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This commit is contained in:
Anton Ljungdahl 2025-02-03 17:55:56 +01:00
parent bbc1b91772
commit 59874496e9
68 changed files with 39 additions and 12323 deletions
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15
.editorconfig
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# top-most EditorConfig file
root = true
# Unix-style newlines with a newline ending every file
[*]
end_of_line = lf
insert_final_newline = true
indent_style = space
indent_size = 2
# Matches multiple files with brace expansion notation
# Set default charset
[*.{c,h,js,py}]
charset = utf-8

2
README.md
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# app_codebase

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app_codebase_rdbg.rdbg
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110
base_app.10x
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<?xml version="1.0"?>
<N10X>
<Workspace>
<IncludeFilter>*.c,*.cc,*.cpp,*.c++,*.cp,*.cxx,*.h,*.hh,*.hpp,*.h++,*.hp,*.hxx,*.inl,*.cs,*.rs,*.java,*.jav,*.js,*.jsc,*.jsx,*.json,*.cls,*.py,*.rpy,*.php,*.php3,*.phl,*.phtml,*.rhtml,*.tpl,*.phps,*.lua,*.html,*.html5,*.htm,*.xml,*.xaml,*.css,*.ssi,*.haml,*.yaml,*.bat,*.wbf,*.wbt,*.txt,*.cmake,*.make,*.makefile,*.mak,*.mk,*.sh,*.bash,*.csv,*.asp,*.pl,*.mac,*.ws,*.vbs,*.perl,*.src,*.rss,*.inc,*.f,*.go,*.prl,*.plx,*.rb,*.lsp,*.lpx,*.ps1,*.command,*.cbl,*.cob,*.qs,*.wxs,*.ph,*.msc,*.glsl,*.hlsl,*.fx,*.vert,*.tesc,*.tese,*.geom,*.frag,*.comp,*.pssl,*.scons,*.cu,*.jai,</IncludeFilter>
<ExcludeFilter></ExcludeFilter>
<SyncFiles>true</SyncFiles>
<Recursive>true</Recursive>
<ShowEmptyFolders>true</ShowEmptyFolders>
<IsVirtual>false</IsVirtual>
<IsFolder>false</IsFolder>
<BuildCommand>build.bat</BuildCommand>
<RebuildCommand></RebuildCommand>
<BuildFileCommand></BuildFileCommand>
<CleanCommand></CleanCommand>
<BuildWorkingDirectory></BuildWorkingDirectory>
<CancelBuild></CancelBuild>
<RunCommand></RunCommand>
<RunCommandWorkingDirectory></RunCommandWorkingDirectory>
<DebugCommand></DebugCommand>
<ExePathCommand></ExePathCommand>
<DebugSln></DebugSln>
<UseVisualStudioEnvBat>false</UseVisualStudioEnvBat>
<Configurations>
<Configuration>Debug</Configuration>
<Configuration>Release</Configuration>
</Configurations>
<Platforms>
<Platform>x64</Platform>
<Platform>Win32</Platform>
</Platforms>
<AdditionalIncludePaths>
<AdditionalIncludePath>C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Tools\MSVC\14.29.30133\ATLMFC\include
C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Tools\MSVC\14.29.30133\include
C:\Program Files (x86)\Windows Kits\NETFXSDK\4.8\include\um
C:\Program Files (x86)\Windows Kits\10\include\10.0.22000.0\ucrt
C:\Program Files (x86)\Windows Kits\10\include\10.0.22000.0\shared
C:\Program Files (x86)\Windows Kits\10\include\10.0.22000.0\um
C:\Program Files (x86)\Windows Kits\10\include\10.0.22000.0\winrt
C:\Program Files (x86)\Windows Kits\10\include\10.0.22000.0\cppwinrt
C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Tools\MSVC\14.29.30133\ATLMFC\include
C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Tools\MSVC\14.29.30133\include
C:\Program Files (x86)\Windows Kits\NETFXSDK\4.8\include\um
C:\Program Files (x86)\Windows Kits\10\include\10.0.22000.0\ucrt
C:\Program Files (x86)\Windows Kits\10\include\10.0.22000.0\shared
C:\Program Files (x86)\Windows Kits\10\include\10.0.22000.0\um
C:\Program Files (x86)\Windows Kits\10\include\10.0.22000.0\winrt
C:\Program Files (x86)\Windows Kits\10\include\10.0.22000.0\cppwinrt
</AdditionalIncludePath>
</AdditionalIncludePaths>
<Defines>
<Define>OS_WINDOWS 1</Define>
</Defines>
<ConfigProperties>
<ConfigAndPlatform>
<Name>Debug:x64</Name>
<Defines></Defines>
<ForceIncludes>
<ForceInclude>base_inc.h</ForceInclude>
<ForceInclude>os_inc.h</ForceInclude>
</ForceIncludes>
</ConfigAndPlatform>
<Config>
<Name>Debug</Name>
<Defines></Defines>
</Config>
<Platform>
<Name>x64</Name>
<Defines></Defines>
</Platform>
</ConfigProperties>
<Children>
<Folder>
<Path>.git</Path>
<IncludeFilter>*.c,*.cc,*.cpp,*.c++,*.cp,*.cxx,*.h,*.hh,*.hpp,*.h++,*.hp,*.hxx,*.inl,*.cs,*.rs,*.java,*.jav,*.js,*.jsc,*.jsx,*.json,*.cls,*.py,*.rpy,*.php,*.php3,*.phl,*.phtml,*.rhtml,*.tpl,*.phps,*.lua,*.html,*.html5,*.htm,*.xml,*.xaml,*.css,*.ssi,*.haml,*.yaml,*.bat,*.wbf,*.wbt,*.txt,*.cmake,*.make,*.makefile,*.mak,*.mk,*.sh,*.bash,*.csv,*.asp,*.pl,*.mac,*.ws,*.vbs,*.perl,*.src,*.rss,*.inc,*.f,*.go,*.prl,*.plx,*.rb,*.lsp,*.lpx,*.ps1,*.command,*.cbl,*.cob,*.qs,*.wxs,*.ph,*.msc,*.glsl,*.hlsl,*.fx,*.vert,*.tesc,*.tese,*.geom,*.frag,*.comp,*.pssl,*.scons,*.cu,*.jai,</IncludeFilter>
<ExcludeFilter></ExcludeFilter>
<SyncFiles>true</SyncFiles>
<Recursive>true</Recursive>
<ShowEmptyFolders>true</ShowEmptyFolders>
<IsVirtual>false</IsVirtual>
<Children></Children>
</Folder>
<Folder>
<Path>build</Path>
<IncludeFilter>*.c,*.cc,*.cpp,*.c++,*.cp,*.cxx,*.h,*.hh,*.hpp,*.h++,*.hp,*.hxx,*.inl,*.cs,*.rs,*.java,*.jav,*.js,*.jsc,*.jsx,*.json,*.cls,*.py,*.rpy,*.php,*.php3,*.phl,*.phtml,*.rhtml,*.tpl,*.phps,*.lua,*.html,*.html5,*.htm,*.xml,*.xaml,*.css,*.ssi,*.haml,*.yaml,*.bat,*.wbf,*.wbt,*.txt,*.cmake,*.make,*.makefile,*.mak,*.mk,*.sh,*.bash,*.csv,*.asp,*.pl,*.mac,*.ws,*.vbs,*.perl,*.src,*.rss,*.inc,*.f,*.go,*.prl,*.plx,*.rb,*.lsp,*.lpx,*.ps1,*.command,*.cbl,*.cob,*.qs,*.wxs,*.ph,*.msc,*.glsl,*.hlsl,*.fx,*.vert,*.tesc,*.tese,*.geom,*.frag,*.comp,*.pssl,*.scons,*.cu,*.jai,</IncludeFilter>
<ExcludeFilter></ExcludeFilter>
<SyncFiles>true</SyncFiles>
<Recursive>true</Recursive>
<ShowEmptyFolders>true</ShowEmptyFolders>
<IsVirtual>false</IsVirtual>
<Children></Children>
</Folder>
<File>
<Path>build.bat</Path>
</File>
<Folder>
<Path>src</Path>
<IncludeFilter>*.c,*.cc,*.cpp,*.c++,*.cp,*.cxx,*.h,*.hh,*.hpp,*.h++,*.hp,*.hxx,*.inl,*.cs,*.rs,*.java,*.jav,*.js,*.jsc,*.jsx,*.json,*.cls,*.py,*.rpy,*.php,*.php3,*.phl,*.phtml,*.rhtml,*.tpl,*.phps,*.lua,*.html,*.html5,*.htm,*.xml,*.xaml,*.css,*.ssi,*.haml,*.yaml,*.bat,*.wbf,*.wbt,*.txt,*.cmake,*.make,*.makefile,*.mak,*.mk,*.sh,*.bash,*.csv,*.asp,*.pl,*.mac,*.ws,*.vbs,*.perl,*.src,*.rss,*.inc,*.f,*.go,*.prl,*.plx,*.rb,*.lsp,*.lpx,*.ps1,*.command,*.cbl,*.cob,*.qs,*.wxs,*.ph,*.msc,*.glsl,*.hlsl,*.fx,*.vert,*.tesc,*.tese,*.geom,*.frag,*.comp,*.pssl,*.scons,*.cu,*.jai,</IncludeFilter>
<ExcludeFilter></ExcludeFilter>
<SyncFiles>true</SyncFiles>
<Recursive>true</Recursive>
<ShowEmptyFolders>true</ShowEmptyFolders>
<IsVirtual>false</IsVirtual>
<Children></Children>
</Folder>
<File>
<Path>run.bat</Path>
</File>
</Children>
</Workspace>
</N10X>

42
build.bat
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ctime -begin timeBuild.ctm
set CommonCompilerFlags=/nologo /Zi /FC /WX /W4 /wd4201 /wd4100 /wd4189 /wd4244 /wd4127 /wd4456
@rem set Sources=../src/main.c
@rem set OutputName=program.exe
set Sources=../src/algorithms_main.c
set OutputName=algorithms_test.exe
@rem /WX /W4 /wd4201 /wd4100 /wd4189 /wd4244 /wd4127 /wd4456
@rem set CommonCompilerFlags="/nologo /Zi /FC"
set CommonCompilerFlags=/nologo /Zi /FC /Od
@rem /WX /W4 /wd4201 /wd4100 /wd4189 /wd4244 /wd4127 /wd4456
@rem
set mkl_root=D:/lib/oneAPI_mkl/mkl/2021.3.0
set mkl_core=%mkl_root%/lib/intel64/mkl_core.lib
set mkl_intel_lp64=%mkl_root%/lib/intel64/mkl_intel_lp64.lib
set mkl_intel_thread=%mkl_root%/lib/intel64/mkl_intel_thread.lib
set MKLCOMPILER=D:/lib/oneAPI_mkl/compiler/2021.3.0/windows/compiler
set libiomp5md=%MKLCOMPILER%/lib/intel64_win/libiomp5md.lib
set libiompdll_path=D:\lib\oneAPI_mkl\compiler\2021.3.0\windows\redist\intel64_win\compiler
set libiompdll_name=libiomp5md.dll
set libiompdll=%libiompdll_path%\%libiompdll_name%
set Sources=../src/main.c
IF NOT EXIST .\out mkdir .\out
IF NOT EXIST .\build mkdir .\build
pushd .\build
cl %CommonCompilerFlags% %Sources% -Fe%OutputName%
if not exist "%libiompdll_name%" (
echo Copying %libiompdll%
copy "%libiompdll%" .
if errorlevel 1 (
echo Error copying openmp dll
) else (
echo Copied openmp dll: %libiompdll_name%
)
)
cl %CommonCompilerFlags% %Sources% /I"%mkl_root%\include" /link %mkl_core% %mkl_intel_lp64% %mkl_intel_thread% %libiomp5md%
set LastError=%ERRORLEVEL%
popd

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data/LiberationMono-Regular.ttf
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data/arial.ttf
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5
run.bat
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@echo off
pushd build
@rem call program.exe
call algorithms_test.exe
popd

104
src/algorithms_main.c
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// header includes
#include "base/base_inc.h"
#include "os/os_inc.h"
// .c includes
#include "base/base_inc.c"
#include "os/os_inc.c"
#include "os/os_entry_point.c"
#define LOG DebugPrintf
function void
DebugPrintf(const char* format, ...)
{
char buffer[4096];
va_list args;
va_start(args, format);
vsprintf_s(buffer, sizeof(buffer), format, args);
OutputDebugString(buffer);
va_end(args);
}
typedef struct F64Node F64Node;
struct F64Node
{
F64Node *prev;
F64Node *next;
F64 value;
};
typedef struct F64List F64List;
struct F64List
{
F64Node *first;
F64Node *last;
U32 length;
};
F64Node g_f64_nil_node = {0};
function void
F64_push_node(F64List *list, F64Node *n)
{
if(list->first == 0)
{
list->first = n;
list->last = n;
} else {
list->last->next = n;
list->last = n;
}
list->length += 1;
}
function void
F64_push(Arena *arena, F64List *list, F64 value)
{
F64Node *node = PushArrayZero(arena, F64Node, 1);
node->value = value;
F64_push_node(list, node);
}
function void
print_F64_ll(F64List *list)
{
for(F64Node *n = list->first; n != 0; n = n->next)
{
LOG(" %2.f \n", n->value);
}
}
function void
reverse_linked_list_lol(void)
{
Arena *ll_arena = m_make_arena();
F64List list = {0};
for (U32 i = 0; i < 10; i++)
{
F64_push(ll_arena, &list, (F64)i);
}
print_F64_ll(&list);
F64Node *prev = 0;
F64Node *current = list.first;
F64Node *next_temp = 0;
while(current != 0)
{
next_temp = current->next;
current->next = prev;
prev = current;
current = next_temp;
}
list.first = prev;
print_F64_ll(&list);
}
void
EntryPoint(void)
{
reverse_linked_list_lol();
}

178
src/base/base_context_cracking.h
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#ifndef BASE_CONTEXT_CRACKING_H
#define BASE_CONTEXT_CRACKING_H
// NOTE(antonl):
// This header is used for "context cracking", ie figuring out compile time context things like
// platform etc.
// For now this is just copy pasted from RJFs layer, and probably that's all that's needed.
///////////////////////////////////////////////
//~ MSVC extraction
#if defined(_MSC_VER)
# define COMPILER_MSVC 1
# if defined(_WIN32)
# define OS_WINDOWS 1
# else
# error _MSC_VER is defined, but _WIN32 is not. This setup is not supported.
# endif
# if defined(_M_AMD64)
# define ARCH_X64 1
# elif defined(_M_IX86)
# define ARCH_X86 1
# elif defined(_M_ARM64)
# define ARCH_ARM64 1
# elif defined(_M_ARM)
# define ARCH_ARM32 1
# else
# error Target architecture is not supported. _MSC_VER is defined, but one of {_M_AMD64, _M_IX86, _M_ARM64, _M_ARM} is not.
# endif
#if _MSC_VER >= 1920
#define COMPILER_MSVC_YEAR 2019
#elif _MSC_VER >= 1910
#define COMPILER_MSVC_YEAR 2017
#elif _MSC_VER >= 1900
#define COMPILER_MSVC_YEAR 2015
#elif _MSC_VER >= 1800
#define COMPILER_MSVC_YEAR 2013
#elif _MSC_VER >= 1700
#define COMPILER_MSVC_YEAR 2012
#elif _MSC_VER >= 1600
#define COMPILER_MSVC_YEAR 2010
#elif _MSC_VER >= 1500
#define COMPILER_MSVC_YEAR 2008
#elif _MSC_VER >= 1400
#define COMPILER_MSVC_YEAR 2005
#else
#define COMPILER_MSVC_YEAR 0
#endif
////////////////////////////////
//~ rjf: Clang Extraction
#elif defined(__clang__)
# define COMPILER_CLANG 1
# if defined(__APPLE__) && defined(__MACH__)
# define OS_MAC 1
# elif defined(__gnu_linux__)
# define OS_LINUX 1
# else
# error __clang__ is defined, but one of {__APPLE__, __gnu_linux__} is not. This setup is not supported.
# endif
# if defined(__amd64__) || defined(__amd64) || defined(__x86_64__) || defined(__x86_64)
# define ARCH_X64 1
# elif defined(i386) || defined(__i386) || defined(__i386__)
# define ARCH_X86 1
# elif defined(__aarch64__)
# define ARCH_ARM64 1
# elif defined(__arm__)
# define ARCH_ARM32 1
# else
# error Target architecture is not supported. __clang__ is defined, but one of {__amd64__, __amd64, __x86_64__, __x86_64, i386, __i386, __i386__, __aarch64__, __arm__} is not.
# endif
////////////////////////////////
//~ rjf: GCC Extraction
#elif defined(__GNUC__) || defined(__GNUG__)
# define COMPILER_GCC 1
# if defined(__gnu_linux__)
# define OS_LINUX 1
# else
# error __GNUC__ or __GNUG__ is defined, but __gnu_linux__ is not. This setup is not supported.
# endif
# if defined(__amd64__) || defined(__amd64) || defined(__x86_64__) || defined(__x86_64)
# define ARCH_X64 1
# elif defined(i386) || defined(__i386) || defined(__i386__)
# define ARCH_X86 1
# elif defined(__aarch64__)
# define ARCH_ARM64 1
# elif defined(__arm__)
# define ARCH_ARM32 1
# else
# error Target architecture is not supported. __GNU_C__ or __GNUG__ is defined, but one of {__amd64__, __amd64, __x86_64__, __x86_64, i386, __i386, __i386__, __aarch64__, __arm__} is not.
# endif
#else
# error Compiler is not supported. _MSC_VER, __clang__, __GNUC__, or __GNUG__ must be defined.
#endif
#if defined(ARCH_X64)
# define ARCH_64BIT 1
#elif defined(ARCH_X86)
# define ARCH_32BIT 1
#endif
////////////////////////////////
//~ rjf: Language
#if defined(__cplusplus)
# define LANG_CPP 1
#else
# define LANG_C 1
#endif
////////////////////////////////
//~ rjf: Zero
#if !defined(ARCH_32BIT)
# define ARCH_32BIT 0
#endif
#if !defined(ARCH_64BIT)
# define ARCH_64BIT 0
#endif
#if !defined(ARCH_X64)
# define ARCH_X64 0
#endif
#if !defined(ARCH_X86)
# define ARCH_X86 0
#endif
#if !defined(ARCH_ARM64)
# define ARCH_ARM64 0
#endif
#if !defined(ARCH_ARM32)
# define ARCH_ARM32 0
#endif
#if !defined(COMPILER_MSVC)
# define COMPILER_MSVC 0
#endif
#if !defined(COMPILER_GCC)
# define COMPILER_GCC 0
#endif
#if !defined(COMPILER_CLANG)
# define COMPILER_CLANG 0
#endif
#if !defined(OS_WINDOWS)
# define OS_WINDOWS 0
#endif
#if !defined(OS_LINUX)
# define OS_LINUX 0
#endif
#if !defined(OS_MAC)
# define OS_MAC 0
#endif
#if !defined(LANG_CPP)
# define LANG_CPP 0
#endif
#if !defined(LANG_C)
# define LANG_C 0
#endif
// TODO(antonl);
// Build options context cracking, need to figure out what we should use here first.
#define BUILD_DEBUG 1
#endif /* BASE_CONTEXT_CRACKING_H */

294
src/base/base_core.h
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@ -1,294 +0,0 @@
#ifndef BASE_TYPES_H
#define BASE_TYPES_H
#include <stdint.h>
#include <stdlib.h>
#include <stdio.h>
/////////////////////////
//~ Macros
/////////////////////////
//- Linking keywords
// TODO(anton): Understand this, yoinked from rjf's layer.
#if LANG_CPP
# define no_name_mangle extern "C"
#else
# define no_name_mangle
#endif
// TODO(anton): OS_WINDOWS dll import/export macros
/////////////////////////
//- Keywords
// Static is stupid and means different things depending on context in C and C++.
// These defines increases readability.
#define function static // Function internal to compilation unit.
#define local_persist static
#define global static
#define fallthrough // for use in switch statements, for clarity..
// TODO(anton): Understand and add good comment on this.
#if LANG_CPP
# define root_global no_name_mangle
# define root_function function
#else
# define root_global extern
# define root_function function
#endif
#define inline_function inline static
#if OS_WINDOWS
# pragma section(".roglob", read)
# define read_only __declspec(allocate(".roglob"))
#else
# define read_only
#endif
#if COMPILER_MSVC
# define per_thread __declspec(thread)
#else
# error Thread keyword not abstracted on compiler.
#endif
/////////////////////////
//- Memory operations
// It's nice to put these in macros, so we can swap out the functionality from standard library, eventually.
#define MemoryCopy memcpy
#define MemoryMove memmove
#define MemorySet memset
// NOTE(anton): This gives a 4127 compiler warning for the sizeof conditional. This should be ignored
#define MemoryCopyStruct(dst, src) do { Assert(sizeof(*(dst)) == sizeof(*(src))); MemoryCopy((dst), (src), sizeof(*(dst))); } while(0)
#define MemoryZero(ptr, size) MemorySet((ptr), 0, (size))
#define MemoryZeroStruct(ptr) MemoryZero((ptr), sizeof(*(ptr)))
#define MemoryZeroArray(arr) MemoryZero((arr), sizeof(arr))
/////////////////////////
//- Integer/pointer/array/type manipulations
#define ArrayCount(a) (sizeof(a) / sizeof((a)[0]))
#define IntFromPtr(p) (U64)(((U8*)p) - 0)
#define PtrFromInt(i) (void*)(((U8*)0) + i)
#define Member(type, member_name) ((type *)0)->member_name
// TODO(anton): Understand why this becomes offset actually
#define OffsetOf(type, member_name) IntFromPtr(&Member(type, member_name))
// TODO(anton): Understand this
#define BaseFromMember(type, member_name, ptr) (type *)((U8 *)(ptr) - OffsetOf(type, member_name))
#define Bytes(n) (n)
#define Kilobytes(n) (n << 10) // 2^10 == 1024 etc
#define Megabytes(n) (n << 20)
#define Gigabytes(n) (((U64)n) << 30)
#define Terabytes(n) (((U64)n) << 40)
#define Thousand(n) ((n)*1000)
#define Million(n) ((n)*1000000)
#define Billion(n) ((n)*1000000000LL)
#define AbsoluteValueU64(x) (U64)llabs((U64)(x))
/////////////////////////
//- Linked list helpers
#define CheckNull(p) ((p)==0)
#define SetNull(p) ((p)=0)
// Link list helper macros that are a bit involved
// Suffixes N,P,Z means that we have (N)ext, (P)rev arguments and/or a (Z)ero check and/or set argument
// f, l, n are "first", "last", "node" I think?
// DLL
// Doubly Linked List: Each node has a prev and next pointer. Operations: Push back, Push front, remove
#define DLLInsert_NPZ(f,l,p,n,next,prev,zchk,SetNull) \
(zchk(f) ? (((f) = (l) = (n)), SetNull((n)->next), SetNull((n)->prev)) :\
zchk(p) ? (SetNull((n)->prev), (n)->next = (f), (zchk(f) ? (0) : ((f)->prev = (n))), (f) = (n)) :\
((zchk((p)->next) ? (0) : (((p)->next->prev) = (n))), (n)->next = (p)->next, (n)->prev = (p), (p)->next = (n),\
((p) == (l) ? (l) = (n) : (0))))
#define DLLPushBack_NPZ(f,l,n,next,prev,zchk,SetNull) DLLInsert_NPZ(f,l,l,n,next,prev,zchk,SetNull)
#define DLLPushBack_NP(f, l, n, next, prev, zchk) \
(zchk(f) ? ((f)=(l)=(n),(n)->next=(n)->prev=0) : ((n)->prev=(l),(l)->next=(n),(l)=(n),(n)->next=0))
// If f == n we put f to f->next, and f->prev = 0.
// Else if l == n, we put l=l->prev, l->next = 0.
// If l != n and f != n we set n->next->prev to n->prev, and n->prev->next to n->next
#define DLLRemove_NP(f, l, n, next, prev) (((f) == (n) ? \
((f)=(f)->next, (f)->prev=0) : \
(l) == (n) ? \
((l)=(l)->prev, (l)->next=0) : \
((n)->next->prev=(n)->prev, \
(n)->prev->next=(n)->next) ))
#define DLLRemove_NPZ(f,l,n,next,prev,zchk,SetNull) (((f)==(n))?\
((f)=(f)->next, (zchk(f) ? (SetNull(l)) : SetNull((f)->prev))):\
((l)==(n))?\
((l)=(l)->prev, (zchk(l) ? (SetNull(f)) : SetNull((l)->next))):\
((zchk((n)->next) ? (0) : ((n)->next->prev=(n)->prev)),\
(zchk((n)->prev) ? (0) : ((n)->prev->next=(n)->next))))
#define DLLPushBack(f, l, n) DLLPushBack_NPZ(f, l, n, next, prev, CheckNull, SetNull)
// For front push I can just switch prev/next!
#define DLLPushFront(f, l, n) DLLPushBack_NPZ(l, f, n, prev, next, CheckNull, SetNull)
#define DLLRemove(f, l, n) DLLRemove_NPZ(f, l, n, next, prev, CheckNull, SetNull)
// SLL, queue or stack.
// These are from rjf's layer.
////////////////
// Queue
// Queue has only a next pointer. But we can push from front also.
// zchk = zero check, SetNull = zero set
#define QueuePush_NZ(f, l, n, next, zchk, SetNull) (zchk(f)?\
(((f)=(l)=(n)), SetNull((n)->next)):\
((l)->next=(n),(l)=(n),SetNull((n)->next)))
#define QueuePushFront_NZ(f, l, n, next, zchk, SetNull) ( zchk(f) ? \
((f)=(l)=(n)), SetNull((n)->next) : \
((n)->next = (f)), ((f) = (n)) )
#define QueuePop_NZ(f, l, next, zchk, SetNull) ( (f)==(l) ? \
(SetNull(f), SetNull(l)) : ((f)=(f)->next))
#define QueuePush(f, l, n) QueuePush_NZ(f, l, n, next, CheckNull, SetNull)
#define QueuePushFront(f, l, n) QueuePushFront_NZ(f, l, n, next, CheckNull, SetNull)
#define QueuePop(f, l) QueuePop_NZ(f, l, next, CheckNull, SetNull)
////////////////
// Stack
#define StackPush_N(f, n, next) ((n)->next=(f), (f)=(n)) // Take the first element and set it to n->next, and set the first element to the node n.
#define StackPop_NZ(f, next, zchk) (zchk(f) ? 0 : ((f)=(f)->next)) // If first element is not zero we say that the first element is f->next, ie we pop f and put f->next on top.
#define StackPush(f, n) StackPush_N(f, n, next)
#define StackPop(f) StackPop_NZ(f, next, CheckNull)
/////////////////////////
//- Clamp/min/max
#define Min(a, b) (((a)<(b)) ? (a) : (b))
#define Max(a, b) (((a)>(b)) ? (a) : (b))
#define ClampTop(x, a) Min(x,a) // "Top" since we are cutting off anything above Min(x,a)
#define ClampBot(a, x) Max(a,x) // "Bot" since we're cutting off anything below Max(a,x)
// If a > x we get a, else we see if b < x and then get b if true, else x.
// TODO(anton): Is this actually what we want from a Clamp?
#define Clamp(a, x, b) (((a)>(x))?(a):((b)<(x))?(b):(x))
//- loop
#define DeferLoop(start, end) for(int _i_ = ((start), 0); _i_ == 0; _i_ += 1, (end))
#define DeferLoopChecked(begin, end) for(int _i_ = 2 * !(begin); (_i_ == 2 ? ((end), 0) : !_i_); _i_ += 1, (end))
#define EachEnumVal(type, it) type it = (type)0; it < type##_COUNT; it = (type)(it+1)
#define EachNonZeroEnumVal(type, it) type it = (type)1; it < type##_COUNT; it = (type)(it+1)
/////////////////////////
//~ Base types
typedef int8_t S8;
typedef int16_t S16;
typedef int32_t S32;
typedef int64_t S64;
typedef uint8_t U8;
typedef uint16_t U16;
typedef uint32_t U32;
typedef uint64_t U64;
typedef S8 B8;
typedef S16 B16;
typedef S32 B32;
typedef S64 B64;
typedef float F32;
typedef double F64;
typedef void VoidFunction(void);
/////////////////////////
//~ Numerical limits
read_only global U8 U8Max = 0xFF;
read_only global U8 U8Min = 0;
read_only global U32 U32Max = 0xFFFFFFFF;
read_only global U32 U32Min = 0;
read_only global U64 U64Max = 0xFFFFFFFFFFFFFFFF;
// TODO(anton): Rest of the limits, unsigned and signed integer values
read_only global U32 SignF32 = 0x80000000;
//- compiler, shut up! helpers
#define unused_variable(name) (void)name
/////////////////////////
//~ Base enums
// Describing a 2-coordinate system
typedef enum Axis2
{
Axis2_Invalid = -1,
Axis2_X,
Axis2_Y,
Axis2_COUNT
}
Axis2;
#define Axis2_flip(a) ((Axis2)(!(a)))
// Corners of a rectangle.
// 00 ----- 10
// | |
// 01 ----- 11
typedef enum Corner
{
Corner_Invalid = -1,
Corner_00,
Corner_01,
Corner_10,
Corner_11,
Corner_COUNT
}
Corner;
////////////////////////////////
//~ Member Offset Helper
typedef struct MemberOffset MemberOffset;
struct MemberOffset
{
U64 v;
};
#define MemberOff(S, member) (MemberOffset){OffsetOf(S, member)}
#define MemberOffLit(S, member) {OffsetOf(S, member)}
#define MemberFromOff(ptr, type, memoff) (*(type *)((U8 *)ptr + memoff.v))
/////////////////////////
//~ Assertions
#if OS_WINDOWS
# define break_debugger() __debugbreak()
#else
# error not implemented
#endif
#undef Assert
#define Assert(b) do { if(!(b)) { break_debugger(); } } while(0)
#if !defined(LOG_NOT_IMPLEMENTED)
# define LOG_NOT_IMPLEMENTED printf("\nFATAL ERROR: Not implemented yet.\n"); Assert(false); exit(1);
#endif
/////////////////////////
//~ Bit patterns
#define AlignUpToPow2(bytes_to_align, alignment_bytes) (((bytes_to_align) + (alignment_bytes - 1)) & ~(alignment_bytes - 1))
inline_function F32
absolute_value_F32(F32 f)
{
union { U32 u; F32 f; } x;
x.f = f;
x.u = x.u & ~SignF32;
return x.f;
}
// TODO(anton): Understand rjf's bit patterns
#endif //BASE_TYPES_H

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#include "base_math.c"
#include "base_memory.c"
#include "base_strings.c"
#include "base_thread_context.c"

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#ifndef BASE_H
#define BASE_H
#include "base_context_cracking.h"
#include "base_core.h"
#include "base_math.h"
#include "base_memory.h"
#include "base_strings.h"
#include "base_thread_context.h"
#endif //BASE_H

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//- Vec2 F32
root_function Vec2_F32
vec2_F32(F32 x, F32 y)
{
Vec2_F32 result;
result.x = x;
result.y = y;
return result;
}
root_function Vec2_F32 add2_F32(Vec2_F32 a, Vec2_F32 b) { return vec2_F32(a.x+b.x, a.y+b.y); }
root_function Vec2_F32 sub2_F32(Vec2_F32 a, Vec2_F32 b) { return vec2_F32(a.x-b.x, a.y-b.y); }
//- Vec2 S32
root_function Vec2_S32
vec2_S32(S32 x, S32 y)
{
Vec2_S32 result;
result.x = x;
result.y = y;
return result;
}
root_function Vec2_S64
vec2_S64(S64 x, S64 y)
{
Vec2_S64 result;
result.x = x;
result.y = y;
return result;
}
root_function Vec3_F32
vec3_F32(F32 x, F32 y, F32 z)
{
Vec3_F32 result;
result.x = x;
result.y = y;
result.z = z;
return result;
}
root_function Vec4_F32
vec4_F32(F32 x, F32 y, F32 z, F32 w)
{
Vec4_F32 result;
result.x = x;
result.y = y;
result.z = z;
result.w = w;
return result;
}
//~ Range functions
root_function Rng2_F32
rng2_F32(Vec2_F32 min, Vec2_F32 max)
{
Rng2_F32 result = { min, max };
return result;
}
root_function Rng2_F32
shift2_F32(Rng2_F32 r, Vec2_F32 v) {
// Shift the rectangle r by vector v.
r.x0 += v.x;
r.y0 += v.y;
r.x1 += v.x;
r.y1 += v.y;
return r;
}
root_function Rng2_F32
pad2_F32(Rng2_F32 r, F32 x)
{
// Pad subtracts the p0 by value x on both axes, and adds to p1 on both axes,
// resulting in a rectangle that is value x larger than input rectangle r on both axes.
Vec2_F32 min = sub2_F32(r.min, vec2_F32(x, x));
Vec2_F32 max = add2_F32(r.max, vec2_F32(x, x));
return rng2_F32(min, max);
}
root_function Vec2_F32
dim2_F32(Rng2_F32 rng)
{
return vec2_F32(absolute_value_F32(rng.max.x - rng.min.x),
absolute_value_F32(rng.max.y - rng.min.y));
}
// Check if a rect contains a point
root_function B32
rng2_contains_vec2_F32(Rng2_F32 r, Vec2_F32 x)
{
B32 c = (r.min.x <= x.x && x.x < r.max.x && r.min.y <= x.y && x.y < r.max.y);
return c;
}
root_function Rng2_F32
rng2_intersect_f32(Rng2_F32 a, Rng2_F32 b)
{
Rng2_F32 c;
c.p0.x = Max(a.min.x, b.min.x);
c.p0.y = Max(a.min.y, b.min.y);
c.p1.x = Min(a.max.x, b.max.x);
c.p1.y = Min(a.max.y, b.max.y);
return c;
}

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#ifndef BASE_MATH_H
#define BASE_MATH_H
//////////////////////////
//~ Macros
#define floor_F32(f) floorf(f)
//////////////////////////
//~ Vector types
//- 2-vectors
typedef union Vec2_S32 Vec2_S32;
union Vec2_S32
{
struct
{
S32 x;
S32 y;
};
S32 v[2];
};
typedef union Vec2_S64 Vec2_S64;
union Vec2_S64
{
struct
{
S64 x;
S64 y;
};
S64 v[2];
};
typedef union Vec2_F32 Vec2_F32;
union Vec2_F32
{
struct
{
F32 x;
F32 y;
};
F32 v[2];
};
//- 3-vectors
typedef union Vec3_F32 Vec3_F32;
union Vec3_F32
{
struct
{
F32 x;
F32 y;
F32 z;
};
F32 v[3];
};
//- 4-vectors
typedef union Vec4_F32 Vec4_F32;
union Vec4_F32
{
struct
{
F32 x;
F32 y;
F32 z;
F32 w;
};
struct
{
Vec2_F32 xy;
Vec2_F32 zw;
};
F32 v[4];
};
//- vector macros
#define vec2_F32_from_vec(v) vec2_F32((F32)(v).x, (F32)(v).y);
#define vec2_S32_from_vec(v) vec2_S32((S32)(v).x, (S32)(v).y);
#define vec2_S64_from_vec(v) vec2_S64((S64)(v).x, (S64)(v).y);
//////////////////////////
//~ Matrix types
typedef struct Mat3x3_F32 Mat3x3_F32;
struct Mat3x3_F32
{
F32 elements[3][3];
};
typedef struct Mat4x4_F32 Mat4x4_F32;
struct Mat4x4_F32
{
F32 elements[4][4];
};
//////////////////////////
//~ Range types
//- 2D interval
//
typedef union Rng2_F32 Rng2_F32;
union Rng2_F32
{
struct
{
Vec2_F32 min;
Vec2_F32 max;
};
struct
{
Vec2_F32 p0;
Vec2_F32 p1;
};
struct
{
F32 x0;
F32 y0;
F32 x1;
F32 y1;
};
Vec2_F32 v[2];
};
//~ Vector functions
//- Vec2 F32
root_function Vec2_F32 vec2_F32(F32 x, F32 y);
root_function Vec2_F32 add2_F32(Vec2_F32 a, Vec2_F32 b);
root_function Vec2_F32 sub2_F32(Vec2_F32 a, Vec2_F32 b);
//- Vec2 S32
root_function Vec2_S32 vec2_S32(S32 x, S32 y);
root_function Vec2_S64 vec2_S64(S64 x, S64 y);
root_function Vec3_F32 vec3_F32(F32 x, F32 y, F32 z);
root_function Vec4_F32 vec4_F32(F32 x, F32 y, F32 z, F32 w);
//~ Range functions
root_function Rng2_F32 rng2_F32(Vec2_F32 min, Vec2_F32 max);
root_function Rng2_F32 shift2_F32(Rng2_F32 r, Vec2_F32 v);
root_function Rng2_F32 pad2_F32(Rng2_F32 r, F32 x);
root_function Vec2_F32 dim2_F32(Rng2_F32 rng);
root_function B32 rng2_contains_vec2_F32(Rng2_F32 r, Vec2_F32 x);
root_function Rng2_F32 rng2_intersect_f32(Rng2_F32 a, Rng2_F32 b);
#endif //BASE_MATH_H

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#include <stdlib.h>
#include <string.h>
#if !defined(m_reserve)
#error missing definition for 'm_reserve' type: (U64)->void*
#endif
#if !defined(m_commit)
#error missing definition for 'm_commit' type: (void*, U64)->void
#endif
#if !defined(m_decommit)
#error missing definition for 'm_decommit' type: (void*, U64)->void
#endif
#if !defined(m_release)
#error missing definition for 'm_release' type: (void*, U64)->void
#endif
static Arena *g_scratch_arena = 0;
root_function void
m_change_memory_noop(void *ptr, U64 size) {}
// Malloc implementation of the M_Base_memory
root_function void*
m_malloc_reserve(U64 size) {
return malloc(size);
}
root_function void
m_malloc_release(void *ptr, U64 size) {
free(ptr);
}
//~ 64-bit memory arena
root_function Arena
*m_make_arena_reserve(U64 reserve_size) {
Arena *result = 0;
U64 initial_commit_size = ARENA_COMMIT_GRANULARITY;
if (reserve_size >= initial_commit_size) {
void *memory = m_reserve(reserve_size);
// Since we use "header" space we must ensure the initial commit can fit the Arena struct.
Assert(initial_commit_size >= sizeof(Arena));
m_commit(memory, ARENA_COMMIT_GRANULARITY);
result = (Arena*)memory;//(Arena*)result; <- this has to be mistake in Allen's video.. ?
// After we have pointed to our newly reserved and commited memory,
// we fill in the "header" parts, which are just the members of the arena type.
result->capacity = reserve_size;
result->commit_pos = initial_commit_size;
result->align = 8; // 8-bytes alignment?
result->pos = sizeof(Arena); // Here we point the position to after the Arena "header" section.
}
return result;
}
root_function Arena*
m_make_arena() {
Arena* result = m_make_arena_reserve(M_DEFAULT_RESERVE_SIZE);
return result;
}
// NOTE(anton): rjf calls this "arena push no zero", as opposed to pushing a zeroed array.
// Not sure why we would make this differentiation, maybe not important.
root_function void*
m_arena_push(Arena *arena, U64 size) {
void *result = 0;
if (arena->pos + size <= arena->capacity) {
/*U8 *base = (U8 *)arena; // Get memory base pointer.
// Adjust by any alignment if necessary.
// Doing modulo ensures we get a number in the 0-align-1 range.
U64 post_align_pos = (arena->pos + (arena->align-1)):
post_align_pos = post_align_pos % arena->align;
// What's happening here? Almost certainly the align will overflow here?
// Are we filling the allocated space backwards or what's up?
// TODO(anton): UNDERSTAND
U64 align = post_align_pos - arena->pos;
result = base + arena->pos + align;
arena->pos += size + align;*/
// Do Allen4th version until I understand the above.
result = ((U8*) arena) + arena->pos;
arena->pos += size; // increment pos by what we want to push
U64 p = arena->pos;
U64 commit_p = arena->commit_pos;
if (p > commit_p) {
U64 p_aligned = AlignUpToPow2(p, M_COMMIT_BLOCK_SIZE);
U64 next_commit_p = ClampTop(p_aligned, arena->capacity); // Make sure new commit_p won't overshoot capacity
U64 commit_size = next_commit_p - commit_p;
m_commit((U8 *)arena + commit_p, commit_size);
arena->commit_pos = next_commit_p;
}
} else {
// NOTE(anton): Should implement some fallback but now we fail.
}
return result;
}
root_function void
m_arena_pop_to(Arena *arena, U64 pos) {
if (pos < arena->pos) {
arena->pos = pos;
U64 p = arena->pos;
U64 p_aligned = AlignUpToPow2(p, M_COMMIT_BLOCK_SIZE);
U64 next_commit_p = ClampTop(p_aligned, arena->capacity);
U64 commit_p = arena->commit_pos;
if (next_commit_p < commit_p) {
U64 decommit_size = commit_p - next_commit_p;
m_decommit((U8 *)arena + next_commit_p, decommit_size);
arena->commit_pos = next_commit_p;
}
}
}
root_function void m_arena_pop(Arena* arena, U64 size) {
U64 min_pos = sizeof(Arena);
U64 size_to_pop = Min(size, arena->pos);
U64 new_pos = arena->pos - size_to_pop;
new_pos = Max(new_pos, min_pos);
m_arena_pop_to(arena, new_pos);
}
/** Push size and set the memory to zero. */
root_function void*
m_arena_push_zero(Arena *arena, U64 size) {
void *result = m_arena_push(arena, size);
MemoryZero(result, size);
return result;
}
root_function void
m_arena_clear(Arena *arena)
{
// We clear the input arena by popping off everything
// after the actual Arena information.
m_arena_pop_to(arena, sizeof(Arena));
}
root_function void
m_arena_align(Arena *arena, U64 pow2_alignment) {
U64 p = arena->pos;
U64 p_aligned = AlignUpToPow2(p, pow2_alignment);
U64 z = p_aligned - p;
if (z > 0) {
m_arena_push(arena, z);
}
}
root_function void
m_arena_release(Arena* arena) {
m_release(arena, arena->capacity);
}
root_function ArenaTemp
m_arena_temp_begin(Arena *arena) {
ArenaTemp temp = { 0 };
temp.arena = arena;
temp.pos = arena->pos;
return temp;
}
root_function void
m_arena_temp_end(ArenaTemp temp) {
m_arena_pop_to(temp.arena, temp.pos);
}

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/* date = April 20th 2023 9:43 pm */
#ifndef BASE_MEMORY_H
#define BASE_MEMORY_H
#if !defined(ARENA_COMMIT_GRANULARITY)
#define ARENA_COMMIT_GRANULARITY Kilobytes(4)
#endif
#if !defined(ARENA_DECOMMIT_THRESHOLD)
#define ARENA_DECOMMIT_THRESHOLD Megabytes(64)
#endif
#if !defined(M_DEFAULT_RESERVE_SIZE)
#define M_DEFAULT_RESERVE_SIZE Megabytes(512)
#endif
#if !defined(M_COMMIT_BLOCK_SIZE)
#define M_COMMIT_BLOCK_SIZE Megabytes(64)
#endif
// We store this information in the header of the allocated memory for the arena!!!
typedef struct Arena Arena;
struct Arena {
U64 pos;
U64 commit_pos;
U64 capacity;
U64 align;
};
typedef struct ArenaTemp ArenaTemp;
struct ArenaTemp {
Arena *arena;
U64 pos;
};
root_function void m_change_memory_noop(void *ptr, U64 size);
root_function Arena* m_make_arena_reserve(U64 reserve_size);
root_function Arena* m_make_arena();
root_function void m_arena_release(Arena *arena);
root_function void* m_arena_push(Arena *arena, U64 size);
root_function void m_arena_pop_to(Arena *arena, U64 pos);
root_function void m_arena_pop(Arena* arena, U64 size);
root_function void m_arena_align(Arena *arena, U64 pow2_alignment);
root_function void* m_arena_push_zero(Arena *arena, U64 size);
root_function void m_arena_clear(Arena *arena);
#define PushArray(arena, type, count) (type *)m_arena_push((arena), sizeof(type)*(count))
#define PushArrayZero(arena, type, count) (type *)m_arena_push_zero((arena), sizeof(type)*(count))
//~ temp arena
root_function ArenaTemp m_arena_temp_begin(Arena *arena);
root_function void m_arena_temp_end(ArenaTemp temp);
// TODO(anton): Not sure when I should use this?
#define ArenaTempBlock(arena, name) ArenaTemp name = { 0 }; DeferLoop(name = m_arena_temp_begin(arena), m_arena_temp_end(name))
#endif //BASE_MEMORY_H

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#include <stdarg.h>
//~ Helpers
root_function U64
calculate_string_C_string_length(char *cstr) {
/*U64 length = 0;
for(char* p = cstr; p != '\0'; p += 1) {
length += 1;
}
return length;*/
// A cool way to write this is this while loop
U64 length = 0;
for (/* empty here means just while loop*/;
/* While we're not at null terminator */ cstr[length];
/* Increment */ length += 1);
// Then we're actually done and just return length;
return length;
}
//~ Constructors
root_function String8
str8(U8 *str, U64 size) {
String8 string;
string.str = str;
string.size = size;
return string;
}
root_function String8
str8_range(U8 *first, U8 *one_past_last) {
String8 string;
string.str = first;
string.size = (U64)(one_past_last - first);
return string;
}
//~ Substrings
//- String8
root_function String8
str8_substr(String8 string, U64 first, U64 one_past_last) {
// We get a substring from the range one_past_last - first
U64 min = first;
U64 max = one_past_last;
// Logic to prepare for swithing input to a range instead of first/one_past_last
if (max > string.size) {
max = string.size;
}
if (min > string.size) {
min = string.size;
}
if (min > max) {
U64 swap = min;
min = max;
max = swap;
}
string.size = max - min;
string.str += min; // Increment the pointer of the String8 to the min.
return string;
}
root_function String8 str8_prefix(String8 string, U64 size) { return str8_substr(string, 0, size); }
root_function String8 str8_chop(String8 string, U64 amount) { return str8_substr(string, 0, string.size-amount); }
root_function String8 str8_suffix(String8 string, U64 size) { return str8_substr(string, string.size-size, string.size); }
root_function String8 str8_skip(String8 string, U64 amount) { return str8_substr(string, amount, string.size); }
// String16
// String32
//~ Lists
//- String8
root_function void
str8_list_push_node(String8List *list, String8Node *n) {
QueuePush(list->first, list->last, n);
list->node_count += 1;
list->total_size += n->string.size;
}
root_function void
str8_list_push_node_front(String8List *list, String8Node *n) {
QueuePushFront(list->first, list->last, n);
list->node_count += 1;
list->total_size += n->string.size;
}
// Wrapper that pushes the memory for a node onto the arena, and then puts the node in the linked list (in the back).
root_function void
str8_list_push(Arena *arena, String8List *list, String8 string) {
String8Node *n = PushArrayZero(arena, String8Node, 1);
n->string = string;
str8_list_push_node(list, n);
}
// Wrapper that pushes the memory for a node onto the arena, and then puts the node in the linked list (in the front).
root_function void
str8_list_push_front(Arena *arena, String8List *list, String8 string) {
String8Node *n = PushArrayZero(arena, String8Node, 1);
n->string = string;
str8_list_push_node_front(list, n);
}
root_function void
str8_list_concat(String8List *list, String8List *to_push) {
// If to_push is a non-zero length String8List,
// we add it to the input list.
if (to_push->first) {
list->node_count += to_push->node_count;
list->total_size += to_push->total_size;
// If the input list's last element is null
// we had a zero length input list, and we just set the input list equal to to_push
if (list->last == 0) {
*list = *to_push;
} else {
// Else we append the to_push list to the input list.
list->last->next = to_push->first;
list->last = to_push->last;
}
}
// TODO(anton): Why are we zeroing the memory here?
MemoryZero(to_push, sizeof(*to_push));
//LOG_NOT_IMPLEMENTED;
}
// TODO(anton): Understand this function and write comments about the logic.
root_function String8List
str8_split(Arena *arena, String8 string, int split_count, String8 *splits) {
String8List list = { 0 };
U64 split_start = 0;
for (U64 i = 0; i < string.size; i += 1)
{
B32 was_split = 0;
for (int split_idx = 0; split_idx < split_count; split_idx += 1)
{
B32 match = 0;
if (i + splits[split_idx].size <= string.size)
{
match = 1;
for (U64 split_i = 0; split_i < splits[split_idx].size && i + split_i < string.size; split_i += 1)
{
if (splits[split_idx].str[split_i] != string.str[i + split_i])
{
match = 0;
break;
}
}
}
if (match)
{
String8 split_string = str8(string.str + split_start, i - split_start);
str8_list_push(arena, &list, split_string);
split_start = i + splits[split_idx].size;
i += splits[split_idx].size - 1;
was_split = 1;
break;
}
}
if (was_split == 0 && i == string.size - 1)
{
String8 split_string = str8(string.str + split_start, i + 1 - split_start);
str8_list_push(arena, &list, split_string);
break;
}
}
return list;
}
// TODO(anton): Understand this function and write good comments explaining.
root_function String8
str8_list_join(Arena *arena, String8List list, StringJoin *optional_params) {
// rjf: setup join parameters
StringJoin join = { 0 };
if (optional_params != 0)
{
MemoryCopy(&join, optional_params, sizeof(join));
}
// rjf: calculate size & allocate
U64 sep_count = 0;
if (list.node_count > 1)
{
sep_count = list.node_count - 1;
}
String8 result = { 0 };
result.size = (list.total_size + join.pre.size +
sep_count*join.sep.size + join.post.size);
result.str = PushArray(arena, U8, result.size + 1);
// rjf: fill
U8 *ptr = result.str;
MemoryCopy(ptr, join.pre.str, join.pre.size);
ptr += join.pre.size;
for (String8Node *node = list.first; node; node = node->next)
{
MemoryCopy(ptr, node->string.str, node->string.size);
ptr += node->string.size;
if (node != list.last)
{
MemoryCopy(ptr, join.sep.str, join.sep.size);
ptr += join.sep.size;
}
}
MemoryCopy(ptr, join.post.str, join.post.size);
ptr += join.post.size;
// rjf: add null
result.str[result.size] = 0;
return result;
}
//~ Allocation and format strings
root_function String8
str8_copy(Arena *arena, String8 string) {
String8 result;
result.size = string.size;
result.str = PushArray(arena, U8, string.size + 1);
MemoryCopy(result.str, string.str, string.size);
result.str[string.size] = 0; // TODO(anton): What is this?
return result;
}
root_function String8
str8_pushfv(Arena *arena, char *fmt, va_list args) {
// Might need to try a second time so copy args
va_list args2;
va_copy(args2, args);
// Try to build string using 1024 bytes
U64 buffer_size = 1024;
U8 *buffer = PushArray(arena, U8, buffer_size);
// The vsnprintf takes the bundled arguments list args and puts the format strings it into buffer.
U64 actual_size = vsnprintf((char*)buffer, buffer_size, fmt, args);
String8 result = { 0 };
if (actual_size < buffer_size) {
// The first try worked and we can pop whatever wasn't used from the buffer
// and get our resulting string.
m_arena_pop(arena, buffer_size - actual_size - 1); // -1 because of null terminated in char *fmt?
result = str8(buffer, actual_size);
} else {
// If first try failed we try again with better size
m_arena_pop(arena, buffer_size);
U8 *fixed_buffer = PushArray(arena, U8, actual_size + 1);
U64 final_size = vsnprintf((char*)fixed_buffer, actual_size + 1, fmt, args2);
result = str8(fixed_buffer, final_size);
}
// va_end to help compiler do its thing.
va_end(args2);
return result;
}
root_function String8
str8_pushf(Arena *arena, char*fmt, ...) {
String8 result = { 0 };
va_list args;
va_start(args, fmt);
result = str8_pushfv(arena, fmt, args);
va_end(args);
return result;
}
root_function void
str8_list_pushf(Arena *arena, String8List *list, char *fmt, ...) {
va_list args;
va_start(args, fmt);
String8 string = str8_pushfv(arena, fmt, args);
va_end(args);
str8_list_push(arena, list, string);
}
//~ Unicode conversions
#define bitmask1 0x01 // Mask first bit
#define bitmask2 0x03 // Mask 2 bits, 3 = 0x03 = 0000 0011 = 2^2 - 1
#define bitmask3 0x07 // Mask 3 bits, 7 = 0x07 = 0000 0111 = 2^3 - 1
#define bitmask4 0x0F // Mask 4 bits, 15 = 0x0F = 0000 1111 = 2^4 - 1
#define bitmask5 0x1F // Mask 5 bits, 31 = 0x1F = 0001 1111 = 2^5 - 1
#define bitmask6 0x3F // Mask 6 bits, 63 = 0x3F = 0011 1111 = 2^6 - 1
#define bitmask7 0x7F // Mask 7 bits, 127 = 0x7F = 0111 1111 = 2^7 - 1
#define bitmask8 0xFF // Mask 8 bits, 255 = 0xFF = 1111 1111 = 2^8 - 1
// Note that we're only decoding valid cases and not handling invalid/errors
root_function DecodeCodepoint
decode_from_utf8(U8 *str, U64 max) {
// This table will give us wheter or not we have a codepoint encoded by one, two, three or four bytes.
local_persist U8 utf8_class[] = {
1, 1, 1, 1,
1, 1, 1, 1,
1, 1, 1, 1,
1, 1, 1, 1,
0, 0, 0, 0,
0, 0, 0, 0,
2, 2, 2, 2,
3, 3,
4,
5 // error
};
DecodeCodepoint result = { ~((U32)0), 1 };
// We'll shift out the lowest 3 bits since those are not important in the decoding.
// This is the byte >> 3 into the static array.
U8 byte = str[0];
U8 byte_class = utf8_class[byte >> 3];
switch (byte_class) {
case 1: {
// Just a single byte encoding.
result.codepoint = byte; // Actually the 8th bit must be zero for valid UTF encoding.
} break;
case 2: {
if (2 <= max) {
U8 cont_byte = str[1];
// Check the second byte
if (utf8_class[cont_byte >> 3] == 0) {
// codepoint is 32-bits
// The case with two bytes has byte1 110xxxxx, ie encoded in the last 5 bits.
// and byte2 is 10xxxxxx, encoded in the last 6 bits. So we use mask5 on first byte, shift by 6,
// and mask6 on second byte.
result.codepoint = (byte & bitmask5) << 6;
result.codepoint |= (cont_byte & bitmask6);
result.advance = 2;
}
}
} break;
case 3: {
if (3 <= max) {
// encoded by 3 bytes, so we have two more cont_bytes.
U8 cont_byte[2] = { str[1], str[2] };
if (utf8_class[cont_byte[0] >> 3] == 0 && utf8_class[cont_byte[1] >> 3] == 0) {
// For this case the first byte is encoded in the last 4 bits, 1110xxxx
// The second and third is 10xxxxxx (last 6 bits)
result.codepoint = (byte & bitmask4) << 12;
result.codepoint |= (cont_byte[0] & bitmask6) << 6;
result.codepoint |= (cont_byte[1] & bitmask6);
result.advance = 3;
}
}
} break;
case 4: {
if (4 <= max) {
U8 cont_byte[3] = { str[1], str[2], str[3] };
if (utf8_class[cont_byte[0] >> 3] == 0 &&
utf8_class[cont_byte[1] >> 3] == 0 &&
utf8_class[cont_byte[2] >> 3] == 0) {
// Here first byte is encoded in last 3 bits, and byte 2,3,4 are encoded in last 6 bits.
// Thus we shift the first byte by 3*6 = 18 bits into the 32 bit codepoint;
result.codepoint = (byte & bitmask3) << 18;
result.codepoint |= (cont_byte[0] & bitmask6) << 12;
result.codepoint |= (cont_byte[1] & bitmask6) << 6;
result.codepoint |= (cont_byte[2] & bitmask6);
result.advance = 4;
}
}
} break;
}
return result;
}
// Encode function
root_function U32
utf8_from_codepoint(U8* out, U32 codepoint) {
U8 bit8 = 0x80;
U32 advance = 0;
if (codepoint <= bitmask7 /* 0111 1111 */) {
// We know that the whole encoding is in the last 7 bits, so it's a 1 byte encoding
out[0] = (U8)codepoint;
advance = 1;
} else if (codepoint <= 0x07FF /*0000 0111 1111 1111*/) {
// The case with two bytes has byte1 110xxxxx, ie encoded in the last 5 bits.
// and byte2 is 10xxxxxx, encoded in the last 6 bits.
out[0] = (bitmask2 << 6) | ((codepoint >> 6) & bitmask5);
out[1] = bit8 | (codepoint & bitmask6);
advance = 2;
} else if (codepoint <= 0xFFFF /* 1111 1111 1111 1111 */) {
// For this case the first byte is encoded in the last 4 bits, 1110xxxx
// The second and third is 10xxxxxx (last 6 bits)
out[0] = (bitmask3 << 5) | ((codepoint >> 12) & bitmask4);
out[1] = bit8 | ((codepoint >> 6) & bitmask6);
out[2] = bit8 | ((codepoint) & bitmask6);
advance = 3;
} else if (codepoint <= 0x10FFFF /*0001 0000 1111 1111 1111 1111 */) {
// Here first byte is encoded in last 3 bits, and byte 2,3,4 are encoded in last 6 bits.
// Thus we shift the first byte by 3*6 = 18 bits into the 32 bit codepoint;
out[0] = (bitmask4 << 4) | ((codepoint >> 18) & bitmask3);
out[1] = bit8 | ((codepoint >> 12) & bitmask6);
out[2] = bit8 | ((codepoint >> 6) & bitmask6);
out[3] = bit8 | ((codepoint) & bitmask6);
advance = 4;
} else {
out[0] = '?'; // ERrror?
advance = 1;
}
return advance;
}
root_function DecodeCodepoint decode_from_utf16(U16 *str, U64 max) {
DecodeCodepoint result = { ~((U32)0), 1 };
result.codepoint = str[0];
result.advance = 1;
// Usually codepoints fit into a single 16 bit chunk.
// But when we're not in the ranges 0x0000 to 0xD7FF and 0xE000 to 0xFFFF,
// we need two 16 bit stores.
// So what we have in str[0] = W1 is the "high surrogate", and
// str[1] = W2 is the "low surrogate". We then get the codepoint U = U' + 0x10000,
// where U' is a 20-bit number with the 10 lower bits from W1 in the high bits, and 10 lower bits of W2 in the lower.
if (max > 1) {
U16 w1 = str[0];
U16 w2 = str[1];
if (0xD800 <= w1 && w1 < 0xDC00 && 0xDC00 <= w2 && w2 < 0xE000) {
// Get W1 ten bits
U16 y = w1 - 0xD800;
U16 x = w2 - 0xDC00;
U32 uprim = (y << 10) | x;
result.codepoint = uprim + 0x10000;
result.advance = 2;
}
}
return result;
}
root_function U32 utf16_from_codepoint(U16* out, U32 codepoint) {
U32 advance = 1;
if (codepoint == ~((U32)0)) {
// Error?
out[0] = (U16)'?';
} else if (codepoint < 0x10000) {
// single 16 bit code unit
out[0] = (U16)codepoint;
} else {
// store 20 bits in uprim
U32 uprim = codepoint - 0x10000;
// create W1
out[0] = 0xD800 + (uprim >> 10);
// 0x03FF = bitmask for 10 lowest bits
// create W2
out[1] = 0xDC00 + (uprim & 0x03FF);
advance = 2;
}
return advance;
}
// TODO(anton): understand this and write comments on steps
root_function String8
str8_from16(Arena *arena, String16 string) {
U64 cap = string.size*3;
U8 *str = PushArray(arena, U8, cap + 1);
U16 *ptr = string.str;
U16 *one_past_last = ptr + string.size;
U64 size = 0;
DecodeCodepoint consume;
for (; ptr < one_past_last;) {
consume = decode_from_utf16(ptr, one_past_last - ptr);
ptr += consume.advance;
size += utf8_from_codepoint(str + size, consume.codepoint);
}
str[size] = 0;
m_arena_pop(arena, cap - size);
return str8(str, size);
}
root_function String8
str8_from32(Arena *arena, String32 string) {
}
// TODO(anton): understand this and write comments on steps
root_function String16
str16_from8(Arena* arena, String8 string) {
U64 cap = string.size*2;
U16 *str = PushArray(arena, U16, cap + 1);
U8 *ptr = string.str;
U8 *one_past_last = ptr + string.size;
U64 size = 0;
DecodeCodepoint consume;
for (; ptr < one_past_last;) {
consume = decode_from_utf8(ptr, one_past_last - ptr);
ptr += consume.advance;
size += utf16_from_codepoint(str + size, consume.codepoint);
}
str[size] = 0;
m_arena_pop(arena, 2*(cap - size));
String16 result;
result.str = str;
result.size = size;
return result;
}
root_function String32
str32_from8(Arena *arena, String8 string) {
}

124
src/base/base_strings.h
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/* date = April 23rd 2023 10:47 am */
#ifndef BASE_STRINGS_H
#define BASE_STRINGS_H
// We decide that the basic string handling will be immutable.
// This means that whatever memory we got when initialising the string is what we have to live with.
// This will give us easy interfaces and work for most cases.
// The downside is that it might not have the best performance, always.
// In such cases we will develop special code for handling the special cases.
/////////////////////////
//~ Basic string types, lists and arrays
typedef struct String8 String8;
struct String8 {
U8* str;
U64 size;
};
typedef struct String16 String16;
struct String16 {
U16 *str;
U64 size;
};
typedef struct String32 String32;
struct String32 {
U32 *str;
U64 size;
};
typedef struct String8Node String8Node;
struct String8Node {
String8Node *next;
String8 string;
};
typedef struct String8List String8List;
struct String8List {
String8Node *first;
String8Node *last;
U64 node_count;
U64 total_size;
};
typedef struct String8Array String8Array;
struct String8Array {
U64 count;
String8 *v;
};
/////////////////////////
//~ String operations
typedef struct StringJoin StringJoin;
struct StringJoin {
String8 pre;
String8 sep;
String8 post;
};
typedef struct DecodeCodepoint DecodeCodepoint;
struct DecodeCodepoint {
U32 codepoint;
U32 advance;
};
/////////////////////////
//~ String operations
//~ String functions
//- Helpers
root_function U64 calculate_string_C_string_length(char *cstr);
//- Constructors
root_function String8 str8(U8 *str, U64 size);
// Get a String8 from a C-string.
#define str8_C(cstring) str8((U8 *)cstring,calculate_string_C_string_length(cstring))
// Get a String8 from a literal
#define str8_lit(s) str8((U8*)(s), sizeof(s) - 1) // -1 since we don't want null terminated,
// but this still stores the null char for interop with APIs
// that expect Cstrings.
// Specify a Str8 as just its struct members
#define str8_lit_comp(s) {(U8*)(s), sizeof(s)-1}
root_function String8 str8_range(U8 *first, U8 *one_past_last);
#define str8_struct(ptr) str8((U8 *)(ptr), sizeof(*(ptr)))
//- Substrings
root_function String8 str8_substr(String8 string, U64 first, U64 one_past_last);
root_function String8 str8_prefix(String8 string, U64 size);
root_function String8 str8_chop(String8 string, U64 amount);
root_function String8 str8_suffix(String8 string, U64 size);
root_function String8 str8_skip(String8 string, U64 amount);
// Used in format strings!
#define str8_expand(s) (int)((s).size), ((s).str)
//- Lists
root_function void str8_list_push_node(String8List *list, String8Node *n);
root_function void str8_list_push_node_front(String8List *list, String8Node *n);
root_function void str8_list_push(Arena *arena, String8List *list, String8 string);
root_function void str8_list_push_front(Arena *arena, String8List *list, String8 string);
root_function void str8_list_concat(String8List *list, String8List *to_push);
root_function String8List str8_split(Arena *arena, String8 string, int split_count, String8 *splits);
root_function String8 str8_list_join(Arena *arena, String8List list, StringJoin *optional_params);
//- Allocation and format strings
root_function String8 str8_copy(Arena *arena, String8 string);
root_function String8 str8_pushfv(Arena *arena, char *fmt, va_list args);
root_function String8 str8_pushf(Arena *arena, char* fmt, ...);
root_function void str8_list_pushf(Arena *arena, String8List *list, char *fmt, ...);
//~ Unicode conversions
root_function DecodeCodepoint decode_from_utf8(U8 *str, U64 max);
root_function U32 utf8_from_codepoint(U8* out, U32 codepoint);
root_function DecodeCodepoint decode_from_utf16(U16 *str, U64 max);
root_function U32 utf16_from_codepoint(U16* out, U32 codepoint);
root_function String8 str8_from16(Arena *arena, String16 string);
root_function String8 str8_from32(Arena *arena, String32 string);
root_function String16 str16_from8(Arena* arena, String8 string);
root_function String32 str32_from8(Arena *arena, String8 string);
#endif //BASE_STRINGS_H

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src/base/base_thread_context.c
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root_function ThreadContext
thread_context_alloc(void)
{
ThreadContext result = { 0 };
for (U64 arena_index = 0; arena_index < ArrayCount(result.arenas); arena_index += 1)
{
result.arenas[arena_index] = m_make_arena_reserve(Gigabytes(8));
}
return result;
}
root_function void
thread_context_release(ThreadContext *context)
{
for (U64 arena_index = 0; arena_index < ArrayCount(context->arenas); arena_index += 1)
{
m_arena_release(context->arenas[arena_index]);
}
}
per_thread ThreadContext *tl_thread_context;
no_name_mangle void
thread_context_set(ThreadContext *context)
{
tl_thread_context = context;
}
no_name_mangle ThreadContext *
thread_context_get(void)
{
return tl_thread_context;
}
root_function B32 is_main_thread(void)
{
ThreadContext *context = thread_context_get();
return context->is_main_thread;
}
root_function ArenaTemp
scratch_get(Arena **conflicts, U64 conflict_count)
{
ArenaTemp scratch = { 0 };
ThreadContext *thread_context = thread_context_get();
for (U64 arena_index = 0; arena_index < ArrayCount(thread_context->arenas); arena_index += 1)
{
B32 is_conflicting = 0;
for(Arena **conflict = conflicts; conflict < conflicts+conflict_count; conflict += 1)
{
if(*conflict == thread_context->arenas[arena_index])
{
is_conflicting = 1;
break;
}
}
if(is_conflicting == 0)
{
scratch.arena = thread_context->arenas[arena_index];
scratch.pos = scratch.arena->pos;
break;
}
}
return scratch;
}
root_function void
base_main_thread_entry(void (*entry)(void), U64 argument_count, char **arguments)
{
// Here we get memory for the thread arenas, and notify that it's a main thread.
ThreadContext thread_context = thread_context_alloc();
thread_context.is_main_thread = 1;
// Here we set it to the global thread context variable
thread_context_set(&thread_context);
// Then call the entry point function for our program
entry();
thread_context_release(&thread_context);
}

39
src/base/base_thread_context.h
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/* date = April 29th 2023 9:18 pm */
#ifndef BASE_THREAD_CONTEXT_H
#define BASE_THREAD_CONTEXT_H
typedef struct ThreadContext ThreadContext;
struct ThreadContext
{
Arena *arenas[2]; // WHy 2 arenas?
char *file_name;
U64 line_number;
U8 thread_name[32];
U64 thread_name_size;
B32 is_main_thread;
};
//root_function ThreadContext make_thread_context(void);
root_function ThreadContext thread_context_alloc(void);
root_function void thread_context_release(ThreadContext *context);
no_name_mangle void
thread_context_set(ThreadContext *context);
no_name_mangle ThreadContext *
thread_context_gett(void);
root_function B32 is_main_thread(void);
//~ scratch memory
root_function ArenaTemp scratch_get(Arena **conflicts, U64 conflict_count);
#define scratch_release(temp) m_arena_temp_end(temp)
//~ entry
// Takes a function pointer to the app entry function.
root_function void
base_main_thread_entry(void (*entry)(void), U64 argument_count, char **arguments);
#endif //BASE_THREAD_CONTEXT_H

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src/draw/draw.c
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/////////////////////////
//~ Draw globals
global D_State *d_state = 0;
per_thread D_ThreadCtx *d_thread_ctx = 0;
// temp color stuff
global F32 g_text_color[4] = {0.95f, 0.9f, 0.94f, 1.0f};
global F32 g_rect_color[4] = {0.6f, 0.5f, 0.6f, 1.0f};
////////////////////////////////
//~ Stack helper macros
#define D_StackPush(node_type, val_type, name, new_val) \
{\
Arena *arena = D_active_arena();\
D_Bucket *bucket = D_active_bucket();\
node_type *node_v = bucket->name##_free;\
if(node_v != 0) {StackPop(bucket->name##_free);}\
else {node_v = PushArray(arena, node_type, 1);}\
node_v->v = new_val;\
new_val = bucket->name##_stack_top->v;\
StackPush(bucket->name##_stack_top, node_v);\
bucket->last_cmd_stack_gen = bucket->current_stack_gen;\
bucket->current_stack_gen += 1;\
return new_val;\
}
#define D_StackPop(node_type, val_type, name) \
{\
val_type result = d_thread_ctx->name##_nil_stack_top.v;\
D_Bucket *bucket = D_active_bucket();\
if(bucket->name##_stack_top != &d_thread_ctx->name##_nil_stack_top)\
{\
node_type *node = bucket->name##_stack_top;\
result = node->v;\
StackPop(bucket->name##_stack_top);\
StackPush(bucket->name##_free, node);\
bucket->last_cmd_stack_gen = bucket->current_stack_gen;\
bucket->current_stack_gen += 1;\
}\
return result;\
}
#define D_StackTop(node_type, val_type, name) \
{\
D_Bucket *bucket = D_active_bucket();\
val_type result = bucket->name##_stack_top->v;\
return result;\
}
/////////////////////////
//~ "Generated" code
#include "draw_meta.c"
/////////////////////////
//~ Layer init
root_function D_InitReceipt
D_init(R_InitReceipt r_init_receipt, F_InitReceipt f_init_receipt)
{
if(is_main_thread() && d_state == 0)
{
Arena* arena = m_make_arena_reserve(Megabytes(2));
d_state = PushArrayZero(arena, D_State, 1);
d_state->arena = arena;
d_state->font_texture = F_atlas_texture_handle();
D_ensure_thread_initialised();
}
D_InitReceipt receipt = {0};
return receipt;
}
root_function void
D_ensure_thread_initialised(void)
{
if(d_thread_ctx == 0)
{
Arena *arena = m_make_arena_reserve(Megabytes(1));
d_thread_ctx = PushArrayZero(arena, D_ThreadCtx, 1);
d_thread_ctx->arena = arena;
d_thread_ctx->fallback_arena = m_make_arena_reserve(Megabytes(256));
D_InitBucketStacks(&d_thread_ctx->fallback_bucket);
d_thread_ctx->bucket_selection_fallback.arena = d_thread_ctx->fallback_arena;
d_thread_ctx->bucket_selection_fallback.bucket = &d_thread_ctx->fallback_bucket;
d_thread_ctx->bucket_selection_top = &d_thread_ctx->bucket_selection_fallback;
D_InitThreadStackTops;
}
}
/////////////////////////
//~ Draw functions
root_function void
D_frame_begin() {
D_ensure_thread_initialised();
}
root_function void
D_frame_end()
{
}
//- Rect
root_function R_Rect2DInst *
D_rect2D_(Rng2_F32 rect, D_RectParams *rect_params)
{
Arena* arena = D_active_arena();
D_Bucket *bucket = D_active_bucket();
R_Pass *pass = D_pass_from_bucket(arena, bucket, R_PassKind_UI);
R_PassParams_UI *pass_params = pass->params_ui;
R_BatchGroup2DNode *batch_group = pass_params->rects.last;
R_Handle tex = d_state->font_texture;
// If we don't have a batch group yet we initialise it here.
// Eventually we will also check for what different textures we have, since
// we batch by texture. What about transform?
// TODO(anton): understand buckets in rjf codebase.
if(batch_group == 0 || bucket->last_cmd_stack_gen != bucket->current_stack_gen)
{
batch_group = PushArrayZero(arena, R_BatchGroup2DNode, 1);
QueuePush(pass_params->rects.first, pass_params->rects.last, batch_group);
pass_params->rects.count += 1;
batch_group->params.albedo_tex = tex;
batch_group->params.albedo_tex_sample_kind = bucket->tex2d_sample_kind_stack_top->v;
Mat3x3_F32 xform2d = {0.0f};
batch_group->params.xform2d = xform2d;
}
// Here we get the available memory in a batch of memory that can be filled with differen things.
// We get a chunk of that memory of the appropriate size for a R_Rect2DInst and fill it out.
R_Rect2DInst *inst = R_batch_list_push_struct(arena, &batch_group->batches, 256 /* capacity */, R_Rect2DInst);
inst->dst_rect = rect;
inst->src_rect = rect_params->src_rect;
inst->colors[Corner_00] = rect_params->color;//vec4_F32(0.6f, 0.5f, 0.6f, 1.0f);
inst->colors[Corner_01] = rect_params->color;//vec4_F32(0.6f, 0.5f, 0.6f, 1.0f);
inst->colors[Corner_10] = rect_params->color;//vec4_F32(0.6f, 0.5f, 0.6f, 1.0f);
inst->colors[Corner_11] = rect_params->color;//vec4_F32(0.6f, 0.5f, 0.6f, 1.0f);
inst->corner_radii[Corner_00] = rect_params->corner_radius;
inst->corner_radii[Corner_01] = rect_params->corner_radius;
inst->corner_radii[Corner_10] = rect_params->corner_radius;
inst->corner_radii[Corner_11] = rect_params->corner_radius;
inst->softness = rect_params->softness;
inst->border_thickness = rect_params->border_thickness;
inst->omit_texture = rect_params->omit_texture;
return inst;
}
root_function F32
D_text2D(Vec2_F32 position, String8 string, Vec4_F32 color)
{
Arena *arena = D_active_arena();
ArenaTemp scratch = scratch_get(&arena, 1);
F_Run run = F_run_from_string(scratch.arena, string, position);
// The position we get in will be the start of where we want to put the text.
// Then we put a draw rectangle for each glyph in the string, and advance the pos.
// The return value from this function then is the length of the text string.
Vec2_F32 p = position;
for(F_Piece *piece = run.first_piece; piece != 0; piece = piece->next)
{
//break_debugger();
D_RectParams params;
params.src_rect = piece->src_rect;
params.omit_texture = 0;
params.color = color;
Vec2_F32 dst_p0 = piece->dst_p0;
Vec2_F32 dst_p1 = piece->dst_p1;
Rng2_F32 rect = rng2_F32(dst_p0, dst_p1);
D_rect2D_(rect, &params);
p.x += piece->advance;
}
scratch_release(scratch);
F32 result = p.x - position.x;
return result;
}
///////////////////////////////////////////////////
//~ Buckets
root_function D_Bucket *
D_bucket_make(Arena *arena)
{
D_Bucket *bucket = PushArrayZero(arena, D_Bucket, 1);
D_InitBucketStacks(bucket);
String8 name = str8_pushf(arena, "HejBucket");
bucket->bucket_name = name;
return bucket;
}
// TODO(anton): bucket and pass list concat in place when needed
root_function void
D_push_bucket(Arena *arena, D_Bucket *bucket)
{
D_BucketSelectionNode *node = d_thread_ctx->bucket_selection_free;
if(node != 0)
{
StackPop(d_thread_ctx->bucket_selection_free);
}
else
{
node = PushArray(d_thread_ctx->arena, D_BucketSelectionNode, 1);
}
node->arena = arena;
node->bucket = bucket;
StackPush(d_thread_ctx->bucket_selection_top, node);
}
root_function void
D_pop_bucket(void)
{
// Get the top bucket node, pop it and put it on the free list.
// If the top node is the fallback arena we will clear and reinit the fallback.
D_BucketSelectionNode *node = d_thread_ctx->bucket_selection_top;
if(node != &d_thread_ctx->bucket_selection_fallback)
{
StackPop(d_thread_ctx->bucket_selection_top);
StackPush(d_thread_ctx->bucket_selection_free, node);
}
if(d_thread_ctx->bucket_selection_top == &d_thread_ctx->bucket_selection_fallback)
{
m_arena_clear(d_thread_ctx->fallback_arena);
MemoryZeroStruct(&d_thread_ctx->fallback_bucket);
D_InitBucketStacks(&d_thread_ctx->fallback_bucket);
}
}
root_function R_Pass *
D_pass_from_bucket(Arena *arena, D_Bucket *bucket, R_PassKind kind)
{
R_PassNode *node = bucket->passes.last;
R_Pass *pass = 0;
// If we dont have a pass node at the last position, we push the pass to the list.
if(node == 0)
{
pass = R_pass_list_push(arena, &bucket->passes, kind);
}
else
{
pass = &node->v;
}
return pass;
}
root_function Arena *
D_active_arena()
{
return d_thread_ctx->bucket_selection_top->arena;
}
root_function D_Bucket *
D_active_bucket(void)
{
return d_thread_ctx->bucket_selection_top->bucket;
}
root_function void
D_submit(R_Handle window_r, D_Bucket *bucket)
{
R_window_submit(window_r, &bucket->passes);
}

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src/draw/draw.h
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/* date = March 19th 2024 10:21 am */
#ifndef DRAW_H
#define DRAW_H
typedef struct D_InitReceipt D_InitReceipt;
struct D_InitReceipt
{
U64 u64[1];
};
///////////////////////////////////////////////////
//~ "Generated" code.
#include "draw_meta.h"
// The drawing bucket contains whatever should be drawn for this frame.
// And we can have several buckets that we submit.
// Each bucket has a list of passes. Each pass has a set of batch groups, ie
// a collection of the data that is supposed to be rendered for that pass. We can have
// several render batches per pass.
typedef struct D_Bucket D_Bucket;
struct D_Bucket
{
R_PassList passes;
String8 bucket_name;
U64 last_cmd_stack_gen;
U64 current_stack_gen;
D_DeclBucketStacks;
};
typedef struct D_State D_State;
struct D_State
{
Arena *arena;
R_Handle font_texture;
};
typedef struct D_BucketSelectionNode D_BucketSelectionNode;
struct D_BucketSelectionNode
{
D_BucketSelectionNode *next;
D_Bucket *bucket;
Arena *arena;
};
typedef struct D_ThreadCtx D_ThreadCtx;
struct D_ThreadCtx
{
Arena *arena;
Arena *fallback_arena;
D_Bucket fallback_bucket;
D_BucketSelectionNode bucket_selection_fallback;
D_BucketSelectionNode *bucket_selection_top;
D_BucketSelectionNode *bucket_selection_free;
D_DeclThreadStackTops;
};
typedef struct D_RectParams D_RectParams;
struct D_RectParams
{
R_Handle albedo_texture;
Rng2_F32 src_rect;
Vec4_F32 color;
F32 corner_radius;
F32 softness;
F32 border_thickness;
F32 omit_texture;
};
///////////////////////////////////////////////////
//~ Draw fwd declarations
root_function D_InitReceipt D_init(R_InitReceipt r_init_receipt, F_InitReceipt f_init_receipt);
root_function void D_ensure_thread_initialised(void);
root_function void D_frame_begin();
root_function void D_frame_end();
///////////////////////////////////////////////////
//~ Buckets
root_function Arena *D_active_arena();
root_function D_Bucket *D_bucket_make(Arena *arena);
root_function void D_bucket_concat_in_place(D_Bucket *to_push);
root_function void D_push_bucket(Arena *arena, D_Bucket *bucket);
root_function void D_pop_bucket(void);
#define D_BucketScope(arena, bucket) DeferLoop(D_push_bucket((arena), (bucket)), D_pop_bucket())
root_function D_Bucket *D_active_bucket(void);
root_function void D_submit(R_Handle window_r, D_Bucket *bucket);
///////////////////////////////////////////////////
//~ Pass helpers
root_function R_Pass *D_pass_from_bucket(Arena *arena, D_Bucket *bucket, R_PassKind kind);
///////////////////////////////////////////////////
//~ UI pass build commands
//- Rect
root_function R_Rect2DInst *D_rect2D_(Rng2_F32 rect, D_RectParams *p);
#define D_rect2D(r, ...) D_rect2D_((r), &(D_RectParams){.color = {1, 1, 1, 1}, __VA_ARGS__})
//- Text
root_function F32 D_text2D(Vec2_F32 pos, String8 string, Vec4_F32 color);
///////////////////////////////////////////////////
//~ Grid build commands
///////////////////////////////////////////////////
//~ Draw stacks.
// The nodes are generated by metadesk code in Ryan's codebase, I will do it manually here first.
// TODO(anton): generate this.
root_function R_Tex2DSampleKind D_push_tex2D_sample_kind(R_Tex2DSampleKind v);
#endif //DRAW_H

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src/draw/draw_inc.c
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#include "draw.c"

8
src/draw/draw_inc.h
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@ -1,8 +0,0 @@
/* date = March 19th 2024 7:46 pm */
#ifndef DRAW_INC_H
#define DRAW_INC_H
#include "draw.h"
#endif //DRAW_INC_H

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src/draw/draw_meta.c
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root_function R_Tex2DSampleKind D_push_tex2D_sample_kind(R_Tex2DSampleKind v) D_StackPush(D_Tex2DSampleKindNode, R_Tex2DSampleKind, tex2d_sample_kind, v)

30
src/draw/draw_meta.h
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@ -1,30 +0,0 @@
/* date = April 6th 2024 11:04 am */
#ifndef DRAW_META_H
#define DRAW_META_H
typedef struct D_Tex2DSampleKindNode D_Tex2DSampleKindNode; struct D_Tex2DSampleKindNode {D_Tex2DSampleKindNode *next; R_Tex2DSampleKind v;};
#define D_DeclThreadStackTops \
struct\
{\
D_Tex2DSampleKindNode tex2d_sample_kind_nil_stack_top;\
}
#define D_InitThreadStackTops \
d_thread_ctx->tex2d_sample_kind_nil_stack_top.v = R_Tex2DSampleKind_Nearest;\
#define D_DeclBucketStacks \
struct\
{\
D_Tex2DSampleKindNode *tex2d_sample_kind_stack_top; D_Tex2DSampleKindNode *tex2d_sample_kind_free;\
}
#define D_InitBucketStacks(b) \
(b)->tex2d_sample_kind_stack_top = &d_thread_ctx->tex2d_sample_kind_nil_stack_top;\
#endif //DRAW_META_H

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src/font/font.c
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global F_State f_state;
root_function F_State *
F_get_state()
{
return &f_state;
}
root_function Arena *
F_get_arena()
{
return f_state.arena;
}
root_function F_InitReceipt
F_init() {
//String8 font_path = str8_lit("D:\\dev\\app_codebase\\data\\LiberationMono-Regular.ttf");
String8 font_path = str8_lit("D:\\dev\\app_codebase\\data\\arial.ttf");
// Load the ttf data into a simple buffer which is just temporary
ArenaTemp scratch = scratch_get(0, 0);
OS_Handle font_file = OS_file_open(OS_AccessFlag_Read, font_path);
OS_FileAttributes attrs = OS_attributes_from_file(font_file);
String8 ttf_temp = OS_file_read(scratch.arena, font_file, 0, attrs.size);
f_state.arena = m_make_arena_reserve(Megabytes(FONT_ARENA_MEMORY_SIZE_MB));
Arena* arena = f_state.arena;
U64 pixel_height = 16;
// ASCII 32..126, 96 glyphs
U64 num_glyphs = 96;
U64 start_glyph = 32;
U64 atlas_size_x = 512;
U64 atlas_size_y = atlas_size_x;
stbtt_bakedchar *cdata = PushArrayZero(arena, stbtt_bakedchar, num_glyphs);
U8 *baked_atlas = PushArrayZero(arena, U8, atlas_size_x*atlas_size_y);
stbtt_BakeFontBitmap(ttf_temp.str, /* loaded font data from file */
0, /* offset */
(float)pixel_height, /* pixel height */
baked_atlas, /* pixel bitmap */
atlas_size_x, atlas_size_y, /* pixel width and height */
start_glyph, num_glyphs,
cdata);
f_state.cdata = cdata;
f_state.baked_atlas = baked_atlas;
//U8 color = 0;
//for(U32 i = 0; i < atlas_size_x; i++)
//{
//for(U32 j = 0; j < atlas_size_y; j++)
//{
//U32 index = j+i*atlas_size_x;
//if(index % 32 == 0) {
//if(color != 0) {
//color = 0;
//} else {
//color = 255;
//}
//}
//baked_atlas[index] = Max(index, 255);
//
//}
//}
Vec2_S64 atlas_size = vec2_S64(atlas_size_x, atlas_size_y);
f_state.atlas.texture = R_tex2d_font_atlas(atlas_size, baked_atlas);
f_state.atlas.size = atlas_size;
f_state.atlas.start_glyph = start_glyph;
f_state.atlas.last_glyph = start_glyph + num_glyphs;
F_InitReceipt result = {0};
scratch_release(scratch);
return result;
}
root_function U8 *
F_get_baked_atlas()
{
return f_state.baked_atlas;
}
root_function R_Handle
F_atlas_texture_handle()
{
return f_state.atlas.texture;
}
root_function F_Run
F_run_from_string(Arena *arena, String8 string, Vec2_F32 pos)
{
F_Run run = {0};
U64 start_glyph = f_state.atlas.start_glyph;
U64 end_glyph = f_state.atlas.last_glyph;
U64 width = f_state.atlas.size.x;
U64 height = f_state.atlas.size.y;
float xpos = pos.x;
float ypos = pos.y;
int fill_rule = 1;
for(U64 i = 0; i < string.size; i++)
{
char c = (char)string.str[i];
if(c < start_glyph || c >= end_glyph) {
continue;
}
stbtt_aligned_quad q;
int glyph_index = c-start_glyph;
stbtt_GetBakedQuad(f_state.cdata, width, height, glyph_index,
&xpos, &ypos, &q, fill_rule);
Vec2_F32 src_p0 = vec2_F32(width*q.s0, height*q.t0);
Vec2_F32 src_p1 = vec2_F32(width*q.s1, height*q.t1);
F_Piece *piece = PushArrayZero(arena, F_Piece, 1);
QueuePush(run.first_piece, run.last_piece, piece);
piece->texture = f_state.atlas.texture;
piece->src_rect = rng2_F32(src_p0, src_p1);
piece->advance = xpos;
piece->offset = vec2_F32(0.0f, ypos);
piece->dst_p0 = vec2_F32(q.x0, q.y0);
piece->dst_p1 = vec2_F32(q.x1, q.y1);
run.piece_count += 1;
run.advance += piece->advance;
}
return run;
}

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src/font/font.h
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#define STB_TRUETYPE_IMPLEMENTATION
#define STBTT_STATIC
#define FONT_ARENA_MEMORY_SIZE_MB 16
#include "stb_truetype.h"
typedef struct F_InitReceipt F_InitReceipt;
struct F_InitReceipt
{
U64 u64[1];
};
typedef struct F_Atlas F_Atlas;
struct F_Atlas
{
R_Handle texture;
U64 start_glyph;
U64 last_glyph;
Vec2_S64 size;
};
typedef struct F_State F_State;
struct F_State
{
Arena* arena;
U8 *baked_atlas;
F_Atlas atlas;
stbtt_bakedchar *cdata;
};
typedef struct F_Piece F_Piece;
struct F_Piece
{
F_Piece *next;
R_Handle texture;
Rng2_F32 src_rect;
Vec2_F32 dst_p0;
Vec2_F32 dst_p1;
Vec2_F32 offset;
F32 advance;
U32 decode_size;
};
// A sequence of glyphs to render, linked list implementation
typedef struct F_Run F_Run;
struct F_Run
{
F_Piece *first_piece;
F_Piece *last_piece;
U64 piece_count;
F32 advance;
};
////////////////////////////
//~ Font forward declarations
root_function Arena *F_get_font_arena();
root_function F_InitReceipt F_init();
root_function U8 *F_get_baked_atlas();
root_function R_Handle F_atlas_texture_handle();
root_function F_Run F_run_from_string(Arena *arena, String8 string, Vec2_F32 position);
root_function F_State *F_get_state(); // TODO remove this its only for d3d11 shutdown crap

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src/font/font_inc.c
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#include "font.c"

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src/font/font_inc.h
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#ifndef FONT_INC_H
#define FONT_INC_H
#include "font.h"
#endif /* FONT_INC_H */

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src/font/stb_truetype.h
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src/main.c
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// header includes
#include "base/base_inc.h"
#include "os/os_inc.h"
#include "render/render_inc.h"
#include "font/font_inc.h"
#include "draw/draw_inc.h"
#include "ui/ui_inc.h"
// .c includes
#include "base/base_inc.c"
#include "os/os_inc.c"
#include "os/os_entry_point.c"
#include "render/render_inc.c"
#include "font/font_inc.c"
#include "draw/draw_inc.c"
#include "ui/ui_inc.c"
#define APP_WINDOW_WIDTH 1280
#define APP_WINDOW_HEIGHT 720
#define OS_REFRESH_RATE 60.0f
#define FRAME_DT 1.0f/OS_REFRESH_RATE
void EntryPoint()
int main()
{
OS_InitReceipt os_receipt = OS_init();
OS_InitGfxReceipt os_gfx_receipt = OS_gfx_init(os_receipt);
//unused_variable(os_gfx_receipt);
R_InitReceipt r_init_receipt = R_init(os_receipt, os_gfx_receipt);
F_InitReceipt f_init_receipt = F_init();
D_InitReceipt d_init_receipt = D_init(r_init_receipt, f_init_receipt);
unused_variable(d_init_receipt);
UI_State *ui = UI_state_alloc();
UI_state_set(ui);
OS_Handle window_handle = OS_window_open(0, vec2_S64(APP_WINDOW_WIDTH, APP_WINDOW_HEIGHT), str8_lit("ello"));
R_Handle window_r = R_window_equip(window_handle);
//break_debugger();
//~ Main loop
MSG msg = {0};
U64 frame_idx = 0;
for (B32 quit = 0; quit == 0;)
{
ArenaTemp scratch = scratch_get(0, 0);
OS_EventList events = OS_get_events(scratch.arena);
if(window_handle.u64[0] == 0)
{
break_debugger();
}
F32 dt = FRAME_DT;
Rng2_F32 client_rect = OS_client_rect_from_window(window_handle);
Vec2_F32 client_rect_dim = dim2_F32(client_rect);
Vec2_S64 resolution = vec2_S64_from_vec(client_rect_dim);
//- Begin frame
R_frame_begin();
D_frame_begin();
UI_frame_begin(dt);
R_window_start(window_r, resolution);
D_Bucket *bucket = D_bucket_make(scratch.arena);
// Anthing within this bucket scope will be pushed onto this the bucket.
D_BucketScope(scratch.arena, bucket)
{
//~ Build UI
UI_build_begin(window_handle, &events); // TODO(anton): events
U64 top_pane_height = 25;
Vec2_F32 top_bar_p0 = vec2_F32(client_rect.x0, client_rect.y0);
Vec2_F32 top_bar_p1 = vec2_F32(client_rect.x0 + client_rect_dim.x, client_rect.y0 + top_pane_height);
Rng2_F32 top_bar_rect = rng2_F32(top_bar_p0, top_bar_p1);
unused_variable(top_bar_rect);
U64 left_pane_width = 0.2f*APP_WINDOW_WIDTH;
///////////////////////////
//- Top bar
{
UI_push_fixed_rect(top_bar_rect);
UI_Box *top_bar_box = UI_box_make(UI_BoxFlag_DrawDropShadow|UI_BoxFlag_DrawBackground|UI_BoxFlag_DrawBorder, str8_lit("top_bar_pane"));
UI_pop_fixed_rect();
UI_push_parent(top_bar_box);
// Top pane
//UI_pane(top_bar_rect, str8_lit("top_bar_pane"))
//UI_width_fill
{
UI_Key file_menu_key = UI_key_from_string(UI_key_zero(), str8_lit("_file_menu_key_"));
UI_ctx_menu(file_menu_key)
{
UI_pref_width(UI_pixels(100, 0.0))
UI_pref_height(UI_pixels(25, 0.0f))
{
String8 buttons[] = {str8_lit("Open"), str8_lit("Exit")};
for(U64 i = 0; i < ArrayCount(buttons); i++)
{
UI_Signal sig = UI_button(buttons[i]);
if(UI_pressed(sig))
{
UI_ctx_menu_close();
}
}
}
}
// Buttons
{
B32 menu_open = 0;
if(ui_state->ctx_menu_open && UI_key_match(file_menu_key, ui_state->ctx_menu_key))
{
menu_open = 1;
}
UI_set_next_pref_width(UI_pixels(100, 0));
UI_set_next_pref_height(UI_pixels(25, 0));
UI_Signal file_button = UI_button(str8_lit("File"));
F32 button_size_y_px = file_button.box->rect.y1-file_button.box->rect.y0;
Vec2_F32 menu_offset = vec2_F32(0, button_size_y_px);
if(menu_open)
{
if(UI_hovering(file_button) && !UI_ctx_menu_is_open(file_menu_key))
{
UI_ctx_menu_open(file_menu_key, file_button.box->key, menu_offset);
}
}
else if(UI_pressed(file_button))
{
if(UI_ctx_menu_is_open(file_menu_key))
{
UI_ctx_menu_close();
}
else
{
UI_ctx_menu_open(file_menu_key, file_button.box->key, menu_offset);
}
}
//UI_ctx_menu_close();
}
}
UI_pop_parent();
}
UI_build_end();
//~ Submit and end frame
UI_draw();
//
//Rng2_F32 range = rng2_F32(vec2_F32(10,10), vec2_F32(100, 35));
//D_rect2D(range, .color = vec4_F32(0, 0, 0, 1.f),
//.corner_radius = 0,
//.softness = 0,
//.omit_texture = 1);
//D_text2D(vec2_F32(range.p0.x, range.p1.y), str8_lit("Testing text"));
//
D_submit(window_r, bucket);
R_window_finish(window_r);
UI_frame_end();
}
//~ Handle Events
for(OS_Event *event = events.first; event != 0; event = event->next)
{
if(event->kind == OS_EventKind_WindowClose)
{
quit = 1;
break;
}
if(event->kind == OS_EventKind_Press && OS_handle_match(event->window, window_handle) &&
event->key == OS_Key_Esc)
{
quit = 1;
break;
}
}
// TODO(anton): Understand this? What is going on?
if(frame_idx == 0)
{
OS_window_first_paint(window_handle);
}
frame_idx += 1;
if(frame_idx == U64Max)
{
frame_idx = 0;
}
scratch_release(scratch);
}
//~ Shutdown
R_window_unequip(window_handle, window_r);
R_shutdown();
return 0;
}
//
//
//UI_padding(UI_pixels(10, 0))
//UI_width_fill
//UI_row
//{
//UI_spacer(UI_pixels(10, 0));
//
//UI_set_next_pref_size(Axis2_X, UI_pixels(100, 1));
//UI_set_next_pref_size(Axis2_Y, UI_pixels(30, 1));
//UI_Signal button1 = UI_button(str8_lit("Button1"));
//unused_variable(button1);
//
//UI_spacer(UI_pixels(10, 0));
//UI_set_next_pref_size(Axis2_X, UI_pixels(100, 0));
//UI_set_next_pref_size(Axis2_Y, UI_pixels(30, 1));
//UI_Signal button2 = UI_button(str8_lit("Button2"));
//unused_variable(button2);
//
//UI_spacer(UI_pixels(10, 0));
//UI_set_next_pref_size(Axis2_X, UI_pixels(100, 0));
//UI_set_next_pref_size(Axis2_Y, UI_pixels(30, 1));
//UI_Signal button3 = UI_button(str8_lit("Button3"));
//unused_variable(button3);
//
//}
//

5
src/os/os_core.c
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@ -1,5 +0,0 @@
root_function B32
OS_handle_match(OS_Handle a, OS_Handle b)
{
return a.u64[0] == b.u64[0];
}

89
src/os/os_core.h
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@ -1,89 +0,0 @@
#ifndef OS_CORE_H
#define OS_CORE_H
typedef U32 OS_AccessFlags;
enum {
OS_AccessFlag_Read = (1<<0),
OS_AccessFlag_Write = (1<<1),
OS_AccessFlag_Execute = (1<<2),
OS_AccessFlag_CreateNew = (1<<3),
OS_AccessFlag_All = 0xFFFFFFFF,
};
typedef struct OS_Handle OS_Handle;
struct OS_Handle {
U64 u64[1];
};
typedef enum OS_ErrorCode
{
OS_ErrorCode_Null,
OS_ErrorCode_COUNT
} OS_ErrorCode;
typedef struct OS_Error OS_Error;
struct OS_Error {
OS_Error *next;
OS_ErrorCode code;
};
typedef struct OS_ErrorList OS_ErrorList;
struct OS_ErrorList {
OS_Error *first;
OS_Error *last;
U64 count;
};
typedef struct OS_InitReceipt OS_InitReceipt;
struct OS_InitReceipt
{
U64 u64[1];
};
typedef U64 OS_Timestamp;
typedef struct OS_FileAttributes OS_FileAttributes;
struct OS_FileAttributes
{
U64 size;
OS_Timestamp last_modified;
};
////////////////////////////////
//~ Helpers
root_function B32 OS_handle_match(OS_Handle a, OS_Handle b);
////////////////////////////////
//~ @os_per_backend Memory
root_function U64 OS_page_size(void);
root_function void* OS_reserve(U64 size);
root_function void OS_release(void *ptr, U64 size);
root_function void OS_commit(void *ptr, U64 size);
root_function void OS_decommit(void *ptr, U64 size);
root_function void OS_set_memory_access_flags(void *ptr, U64 size, OS_AccessFlags flags);
////////////////////////////////
//~ Thread and process types
typedef void OS_Thread_Function(void *params); // void function pointer ?
root_function OS_InitReceipt OS_init(void);
root_function void OS_thread_context_set(void *ptr);
root_function void* OS_thread_context_get(void);
////////////////////////////////
//~ @os_per_backend File System
root_function OS_Handle OS_file_open(OS_AccessFlags access_flags, String8 path);
root_function void OS_file_close(OS_Handle file);
root_function String8 OS_file_read(Arena *arena, OS_Handle file, U64 min, U64 max);
// We supply whatever we want to write as a String8List,
// so we can pull data from different places with no intermediate buffer.
root_function void OS_file_write(Arena *arena, OS_Handle file, U64 off,
String8List data, OS_ErrorList *out_errors);
root_function OS_FileAttributes OS_attributes_from_file(OS_Handle file);
#endif /* OS_CORE_H */

5
src/os/os_entry_point.c
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@ -1,5 +0,0 @@
#if OS_WINDOWS
#include "win32/os_entry_point_win32.c"
#else
#error Entry point not defined
#endif

20
src/os/os_gfx.c
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@ -1,20 +0,0 @@
#include "os_gfx_meta.c"
root_function B32
OS_key_press(OS_EventList *events, OS_Handle window, OS_Key key)
{
B32 result = 0;
for(OS_Event *e = events->first; e != 0; e = e->next)
{
if(e->kind == OS_EventKind_Press && OS_handle_match(window, e->window) && e->key == key)
// TODO(anton): modifiers
{
OS_consume_event(events, e);
result = 1;
break;
}
}
return result;
}

94
src/os/os_gfx.h
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@ -1,94 +0,0 @@
#ifndef OS_GFX_H
#define OS_GFX_H
typedef U32 OS_Window_Flags;
typedef struct OS_InitGfxReceipt OS_InitGfxReceipt;
struct OS_InitGfxReceipt
{
U64 u64[1];
};
#include "os_gfx_meta.h"
////////////////////////////////
//~ Cursor Types
typedef enum OS_Cursor
{
OS_Cursor_Pointer,
OS_Cursor_IBar,
OS_Cursor_LeftRight,
OS_Cursor_UpDown,
OS_Cursor_DownRight,
OS_Cursor_UpRight,
OS_Cursor_UpDownLeftRight,
OS_Cursor_HandPoint,
OS_Cursor_Disabled,
OS_Cursor_COUNT,
}
OS_Cursor;
////////////////////////////////
//~ Events
typedef enum OS_EventKind
{
OS_EventKind_Null,
OS_EventKind_Press,
OS_EventKind_Release,
OS_EventKind_MouseMove,
OS_EventKind_Text,
OS_EventKind_Scroll,
OS_EventKind_WindowLoseFocus,
OS_EventKind_WindowClose,
OS_EventKind_FileDrop,
OS_EventKind_Wakeup,
OS_EventKind_COUNT
}
OS_EventKind;
typedef struct OS_Event OS_Event;
struct OS_Event
{
OS_Event *next;
OS_Event *prev;
OS_Handle window;
OS_EventKind kind;
//OS_Modifiers modifiers;
OS_Key key;
U32 character;
Vec2_F32 position;
Vec2_F32 scroll;
String8 path;
};
typedef struct OS_EventList OS_EventList;
struct OS_EventList
{
OS_Event *first;
OS_Event *last;
U64 count;
};
////////////////////////////////
//~ Event Helpers
root_function U64 OS_character_from_key(OS_Key key);
root_function String8 OS_string_from_event(Arena *arena, OS_Event *event);
root_function B32 OS_key_press(OS_EventList *events, OS_Handle window, OS_Key key);
root_function B32 OS_key_release(OS_EventList *events, OS_Handle window);
root_function B32 OS_text_codepoint(OS_EventList *events, OS_Handle window, U32 codepoint);
root_function Vec2_F32 OS_mouse_from_window(OS_Handle handle);
////////////////////////////////
//~ @os_per_backend Init and windowing
root_function OS_InitGfxReceipt OS_gfx_init(OS_InitReceipt os_init_receipt);
root_function OS_Handle OS_window_open(OS_Window_Flags flags, Vec2_S64 size, String8 title);
root_function Rng2_F32 OS_client_rect_from_window(OS_Handle window_handle);
////////////////////////////////
//~ @os_per_backend Events
root_function OS_EventList OS_get_events(Arena *arena);
root_function void OS_consume_event(OS_EventList *events, OS_Event *event);
#endif /* OS_GFX_H */

95
src/os/os_gfx_meta.c
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@ -1,95 +0,0 @@
String8 os_g_key_string_table[92] =
{
str8_lit_comp("Null"),
str8_lit_comp("Escape"),
str8_lit_comp("F1"),
str8_lit_comp("F2"),
str8_lit_comp("F3"),
str8_lit_comp("F4"),
str8_lit_comp("F5"),
str8_lit_comp("F6"),
str8_lit_comp("F7"),
str8_lit_comp("F8"),
str8_lit_comp("F9"),
str8_lit_comp("F10"),
str8_lit_comp("F11"),
str8_lit_comp("F12"),
str8_lit_comp("F13"),
str8_lit_comp("F14"),
str8_lit_comp("F15"),
str8_lit_comp("F16"),
str8_lit_comp("F17"),
str8_lit_comp("F18"),
str8_lit_comp("F19"),
str8_lit_comp("F20"),
str8_lit_comp("F21"),
str8_lit_comp("F22"),
str8_lit_comp("F23"),
str8_lit_comp("F24"),
str8_lit_comp("Grave Accent"),
str8_lit_comp("0"),
str8_lit_comp("1"),
str8_lit_comp("2"),
str8_lit_comp("3"),
str8_lit_comp("4"),
str8_lit_comp("5"),
str8_lit_comp("6"),
str8_lit_comp("7"),
str8_lit_comp("8"),
str8_lit_comp("9"),
str8_lit_comp("Minus"),
str8_lit_comp("Equal"),
str8_lit_comp("Backspace"),
str8_lit_comp("Delete"),
str8_lit_comp("Tab"),
str8_lit_comp("A"),
str8_lit_comp("B"),
str8_lit_comp("C"),
str8_lit_comp("D"),
str8_lit_comp("E"),
str8_lit_comp("F"),
str8_lit_comp("G"),
str8_lit_comp("H"),
str8_lit_comp("I"),
str8_lit_comp("J"),
str8_lit_comp("K"),
str8_lit_comp("L"),
str8_lit_comp("M"),
str8_lit_comp("N"),
str8_lit_comp("O"),
str8_lit_comp("P"),
str8_lit_comp("Q"),
str8_lit_comp("R"),
str8_lit_comp("S"),
str8_lit_comp("T"),
str8_lit_comp("U"),
str8_lit_comp("V"),
str8_lit_comp("W"),
str8_lit_comp("X"),
str8_lit_comp("Y"),
str8_lit_comp("Z"),
str8_lit_comp("Space"),
str8_lit_comp("Enter"),
str8_lit_comp("Ctrl"),
str8_lit_comp("Shift"),
str8_lit_comp("Alt"),
str8_lit_comp("Up"),
str8_lit_comp("Left"),
str8_lit_comp("Down"),
str8_lit_comp("Right"),
str8_lit_comp("Page Up"),
str8_lit_comp("Page Down"),
str8_lit_comp("Home"),
str8_lit_comp("End"),
str8_lit_comp("Forward Slash"),
str8_lit_comp("Period"),
str8_lit_comp("Comma"),
str8_lit_comp("Quote"),
str8_lit_comp("Left Bracket"),
str8_lit_comp("Right Bracket"),
str8_lit_comp("Insert"),
str8_lit_comp("Left Mouse Button"),
str8_lit_comp("Middle Mouse Button"),
str8_lit_comp("Right Mouse Button"),
str8_lit_comp("Semicolon"),
};

114
src/os/os_gfx_meta.h
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@ -1,114 +0,0 @@
/* date = April 5th 2024 7:56 pm */
#ifndef OS_GFX_META_H
#define OS_GFX_META_H
// TODO(anton): This is generated code in Ryans codebase. I just copy it here now and make some generation
// myself later.
typedef enum OS_Key
{
OS_Key_Null,
OS_Key_Esc,
OS_Key_F1,
OS_Key_F2,
OS_Key_F3,
OS_Key_F4,
OS_Key_F5,
OS_Key_F6,
OS_Key_F7,
OS_Key_F8,
OS_Key_F9,
OS_Key_F10,
OS_Key_F11,
OS_Key_F12,
OS_Key_F13,
OS_Key_F14,
OS_Key_F15,
OS_Key_F16,
OS_Key_F17,
OS_Key_F18,
OS_Key_F19,
OS_Key_F20,
OS_Key_F21,
OS_Key_F22,
OS_Key_F23,
OS_Key_F24,
OS_Key_GraveAccent,
OS_Key_0,
OS_Key_1,
OS_Key_2,
OS_Key_3,
OS_Key_4,
OS_Key_5,
OS_Key_6,
OS_Key_7,
OS_Key_8,
OS_Key_9,
OS_Key_Minus,
OS_Key_Equal,
OS_Key_Backspace,
OS_Key_Delete,
OS_Key_Tab,
OS_Key_A,
OS_Key_B,
OS_Key_C,
OS_Key_D,
OS_Key_E,
OS_Key_F,
OS_Key_G,
OS_Key_H,
OS_Key_I,
OS_Key_J,
OS_Key_K,
OS_Key_L,
OS_Key_M,
OS_Key_N,
OS_Key_O,
OS_Key_P,
OS_Key_Q,
OS_Key_R,
OS_Key_S,
OS_Key_T,
OS_Key_U,
OS_Key_V,
OS_Key_W,
OS_Key_X,
OS_Key_Y,
OS_Key_Z,
OS_Key_Space,
OS_Key_Enter,
OS_Key_Ctrl,
OS_Key_Shift,
OS_Key_Alt,
OS_Key_Up,
OS_Key_Left,
OS_Key_Down,
OS_Key_Right,
OS_Key_PageUp,
OS_Key_PageDown,
OS_Key_Home,
OS_Key_End,
OS_Key_ForwardSlash,
OS_Key_Period,
OS_Key_Comma,
OS_Key_Quote,
OS_Key_LeftBracket,
OS_Key_RightBracket,
OS_Key_Insert,
OS_Key_MouseLeft,
OS_Key_MouseMiddle,
OS_Key_MouseRight,
OS_Key_Semicolon,
OS_Key_COUNT,
}
OS_Key;
root_global String8 os_g_key_string_table[92];
#endif //OS_GFX_META_H

9
src/os/os_inc.c
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@ -1,9 +0,0 @@
#include "os/os_core.c"
#include "os/os_gfx.c"
#if OS_WINDOWS
#include "win32/os_core_win32.c"
#include "win32/os_gfx_win32.c"
#else
# error OS layer for this platform not implemented yet
#endif

28
src/os/os_inc.h
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@ -1,28 +0,0 @@
#ifndef OS_INC_H
#define OS_INC_H
// TODO(anton): Change this to OS implementations of the memory
#if !defined(m_reserve)
#define m_reserve OS_reserve
#endif
#if !defined(m_commit)
#define m_commit OS_commit
#endif
#if !defined(m_decommit)
#define m_decommit OS_decommit
#endif
#if !defined(m_release)
#define m_release OS_release
#endif
#include "os/os_core.h"
#include "os/os_gfx.h"
#if OS_WINDOWS
# include "win32/os_core_win32.h"
# include "win32/os_gfx_win32.h"
#else
# error OS layer for this platform not implemented yet
#endif
#endif //OS_INC_H

260
src/os/win32/os_core_win32.c
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@ -1,260 +0,0 @@
#pragma comment(lib, "user32")
#pragma comment(lib, "winmm")
#pragma comment(lib, "shell32")
//~ Memory
root_function U64
OS_page_size(void) {
SYSTEM_INFO info;
GetSystemInfo(&info);
return info.dwPageSize;
}
root_function void
*OS_reserve(U64 size) {
U64 gb_snapped_size = size;
// Align the reserved memory to nearest gigabyte?
gb_snapped_size += M_DEFAULT_RESERVE_SIZE - 1;
gb_snapped_size -= gb_snapped_size % M_DEFAULT_RESERVE_SIZE;
void *ptr = VirtualAlloc(0, gb_snapped_size, MEM_RESERVE, PAGE_NOACCESS);
return ptr;
}
root_function void
OS_release(void *ptr, U64 size) {
VirtualFree(ptr, 0, MEM_RELEASE);
}
root_function void
OS_commit(void *ptr, U64 size) {
U64 page_snapped_size = size;
page_snapped_size += OS_page_size() - 1;
page_snapped_size -= page_snapped_size%OS_page_size();
VirtualAlloc(ptr, page_snapped_size, MEM_COMMIT, PAGE_READWRITE);
}
root_function void
OS_decommit(void *ptr, U64 size){
VirtualFree(ptr, size, MEM_DECOMMIT);
}
//~ Thread
root_function OS_InitReceipt OS_init(void)
{
if (is_main_thread() && os_g_w32_state == 0)
{
Arena *arena = m_make_arena_reserve(Gigabytes(1));
os_g_w32_state = PushArray(arena, OS_W32_State, 1);
os_g_w32_state->arena = arena;
os_g_w32_state->thread_arena = m_make_arena_reserve(Kilobytes(256));
}
OS_InitReceipt out;
out.u64[0] = 1;
return out;
}
root_function void OS_thread_context_set(void *ptr) {
TlsSetValue(os_g_w32_state->thread_context_index, ptr);
}
root_function void* OS_thread_context_get(void) {
void *result = TlsGetValue(os_g_w32_state->thread_context_index);
return result;
}
/* // TODO(anton): This is an interesting function to protect virtual allocs, but it doesn't look like it's
used in the app template right now. I'll add it when I need it.
root_function void
OS_set_memory_access_flags(void *ptr, U64 size, OS_AccessFlags flags) {
U64 page_snapped_size = size;
page_snapped_size += OS_page_size() - 1;
page_snapped_size -= page_snapped_size%OS_page_size();
DWORD new_flags = 0;
{
switch(flags)
{
default:
{
new_flags = PAGE_NOACCESS;
}break;
#define Map(win32_code, bitflags) case bitflags:{new_flags = win32_code;}break
Map(PAGE_EXECUTE, OS_AccessFlag_Execute);
Map(PAGE_EXECUTE_READ, OS_AccessFlag_Execute|OS_AccessFlag_Read);
Map(PAGE_EXECUTE_READWRITE, OS_AccessFlag_Execute|OS_AccessFlag_Read|OS_AccessFlag_Write);
Map(PAGE_EXECUTE_WRITECOPY, OS_AccessFlag_Execute|OS_AccessFlag_Write);
Map(PAGE_READONLY, OS_AccessFlag_Read);
Map(PAGE_READWRITE, OS_AccessFlag_Read|OS_AccessFlag_Write);
#undef Map
}
}
DWORD old_flags = 0;
VirtualProtect(ptr, page_snapped_size, new_flags, &old_flags);
}
*/
//~ @os_per_backend File System
root_function OS_Handle
OS_file_open(OS_AccessFlags access_flags, String8 path) {
ArenaTemp scratch = scratch_get(0, 0);
String16 path16 = str16_from8(scratch.arena, path);
// Map to win32 access flags
DWORD desired_access = 0;
if(access_flags & OS_AccessFlag_Read) { desired_access |= GENERIC_READ; }
if(access_flags & OS_AccessFlag_Write) { desired_access |= GENERIC_WRITE; }
DWORD share_mode = 0;
SECURITY_ATTRIBUTES security_attributes = {
(DWORD)sizeof(SECURITY_ATTRIBUTES),
0,
0,
};
// Map to win32 creation disposition
DWORD creation_disposition = 0;
if(!(access_flags & OS_AccessFlag_CreateNew)) {
creation_disposition = OPEN_EXISTING;
}
DWORD flags_and_attribs = 0;
HANDLE template_file = 0;
HANDLE file = CreateFileW((WCHAR*)path16.str,
desired_access,
share_mode,
&security_attributes,
creation_disposition,
flags_and_attribs,
template_file);
if(file == INVALID_HANDLE_VALUE) {
// TODO(anton): Append to errors
break_debugger();
}
// Map to abstract handle
OS_Handle handle = {0};
handle.u64[0] = (U64)file;
scratch_release(scratch);
return handle;
}
root_function void
OS_file_close(OS_Handle file) {
HANDLE handle = (HANDLE)file.u64[0];
if(handle != INVALID_HANDLE_VALUE) {
CloseHandle(handle);
}
}
root_function String8
OS_file_read(Arena *arena, OS_Handle file, U64 min, U64 max) {
String8 result = {0};
HANDLE handle = (HANDLE)file.u64[0];
if(handle == INVALID_HANDLE_VALUE) {
// TODO(anton): accumulate errors
} else {
U64 bytes_to_read = AbsoluteValueU64(max - min);
U64 bytes_actually_read = 0;
result.str = PushArray(arena, U8, bytes_to_read);
result.size = 0;
U8 *ptr = result.str;
U8 *one_past_last = result.str + bytes_to_read;
for(;;) {
U64 unread = (U64)(one_past_last - ptr);
DWORD to_read = (DWORD)(ClampTop(unread, U32Max));
DWORD did_read = 0;
// TODO(anton): Understand WINAPI
if(!ReadFile(handle, ptr, to_read, &did_read, 0)) {
break;
}
ptr += did_read;
result.size += did_read;
if(ptr >= one_past_last) {
break;
}
}
}
return result;
}
root_function OS_FileAttributes
OS_attributes_from_file(OS_Handle file)
{
HANDLE handle = (HANDLE)file.u64[0];
OS_FileAttributes attrs = {0};
U32 high_bits = 0;
U32 low_bits = GetFileSize(handle, (DWORD *)&high_bits);
FILETIME last_write_time = {0};
GetFileTime(handle, 0, 0, &last_write_time);
attrs.size = (U64)low_bits | (((U64)high_bits) << 32);
attrs.last_modified = ((U64)last_write_time.dwLowDateTime) |
(((U64)last_write_time.dwHighDateTime) << 32);
return attrs;
}
root_function void
OS_file_write(Arena *arena, OS_Handle file, U64 off, String8List data, OS_ErrorList *out_errors) {
HANDLE handle = (HANDLE)file.u64[0];
if(handle == 0 || handle == INVALID_HANDLE_VALUE)
{
// TODO(anton): accumulate errors
}
else for(String8Node *node = data.first; node != 0; node = node->next)
{
U8 *ptr = node->string.str;
U8 *opl = ptr + node->string.size;
for(;;)
{
U64 unwritten = (U64)(opl - ptr);
DWORD to_write = (DWORD)(ClampTop(unwritten, U32Max));
DWORD did_write = 0;
// TODO(anton): understand winapi
if(!WriteFile(handle, ptr, to_write, &did_write, 0))
{
goto fail_out;
}
ptr += did_write;
if(ptr >= opl)
{
break;
}
}
}
fail_out:;
}
root_function Rng2_F32
OS_client_rect_from_window(OS_Handle window_handle)
{
Rng2_F32 rect = {0};
OS_W32_Window *window = (OS_W32_Window *)window_handle.u64[0];
if(window != 0)
{
RECT w32_rect = {0};
if(GetClientRect(window->hwnd, &w32_rect))
{
rect.x0 = (F32)w32_rect.left;
rect.y0 = (F32)w32_rect.top;
rect.x1 = (F32)w32_rect.right;
rect.y1 = (F32)w32_rect.bottom;
}
}
return rect;
}

49
src/os/win32/os_core_win32.h
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@ -1,49 +0,0 @@
/* date = April 25th 2023 9:46 pm */
#ifndef OS_CORE_WIN32_H
#define OS_CORE_WIN32_H
// To avoid C4042 error when including windows we use some
// preprocessor praga macro things.. So when including the windows headers we
// won't have defined the "function" keyword (we define it in base_core.h),
// and then we redefine it after when popping.
#pragma push_macro("function")
#undef function
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
#pragma pop_macro("function")
// We have a nice debugbreak assert macro, but it is nice to have one also specifically for windows HRESULT
#define AssertHR(hr) Assert(SUCCEEDED(hr))
/////////////////////////////////////
// Processes and threads
typedef struct OS_W32_Thread OS_W32_Thread;
struct OS_W32_Thread
{
OS_W32_Thread *next;
HANDLE handle;
DWORD thread_id;
void *params;
OS_Thread_Function *func;
};
/////////////////////////////////////
// Global state
typedef struct OS_W32_State OS_W32_State;
struct OS_W32_State
{
Arena *arena;
Arena *thread_arena;
DWORD thread_context_index;
};
global HINSTANCE os_g_w32_hinstance;
global OS_W32_State *os_g_w32_state;
//root_function OS_W32_Window* OS_W32_window_from_handle(OS_Handle handle);
#endif //OS_CORE_WIN32_H

9
src/os/win32/os_entry_point_win32.c
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@ -1,9 +0,0 @@
function void EntryPoint(void);
int WinMain(HINSTANCE instance, HINSTANCE prev_instance, LPSTR lp_cmd_line, int n_show_cmd)
{
os_g_w32_hinstance = instance;
base_main_thread_entry(EntryPoint, (U64)__argc, __argv);
return 0;
}

328
src/os/win32/os_gfx_win32.c
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@ -1,328 +0,0 @@
#pragma comment(lib, "gdi32")
#define OS_W32_GraphicalWindowClassName L"ApplicationWindowClass"
root_function OS_InitGfxReceipt
OS_gfx_init(OS_InitReceipt os_init_receipt)
{
if (is_main_thread() && os_g_w32_gfx_state == 0)
{
{
// Global state
Arena *arena = m_make_arena_reserve(Gigabytes(1));
os_g_w32_gfx_state = PushArray(arena, OS_W32_Gfx_State, 1);
os_g_w32_gfx_state->arena = arena;
os_g_w32_gfx_state->window_arena = m_make_arena_reserve(Gigabytes(1));
}
// TODO(antonl) DPI awareness
// Register window class
{
/* WNDCLASSW window_class = { 0 }; */
/* window_class.style = CS_HREDRAW | CS_VREDRAW; */
/* window_class.lpfnWndProc = OS_W32_WindowProc; */
/* window_class.hInstance = g_os_w32_hinstance; */
/* window_class.lpszClassName = OS_W32_GraphicalWindowClassName; */
/* window_class.hCursor = LoadCursor(0, IDC_ARROW); */
/* RegisterClassW(&window_class); */
WNDCLASSEXW window_class = {0};
window_class.cbSize = sizeof(WNDCLASSEXW);
window_class.lpfnWndProc = OS_W32_window_proc;
window_class.hInstance = os_g_w32_hinstance;
window_class.lpszClassName = OS_W32_GraphicalWindowClassName;
if(!RegisterClassExW(&window_class))
{
break_debugger();
}
}
// Rjf makes a "global invisible window", but why?
{
os_g_w32_gfx_state->global_hwnd = CreateWindowExW(0,
OS_W32_GraphicalWindowClassName,
L"",
WS_OVERLAPPEDWINDOW,
100,100,
0,0,
0,0,
os_g_w32_hinstance, 0);
os_g_w32_gfx_state->global_hdc = GetDC(os_g_w32_gfx_state->global_hwnd);
}
}
OS_InitGfxReceipt out;
out.u64[0] = 1;
return out;
}
root_function OS_Handle
OS_W32_handle_from_window(OS_W32_Window *window)
{
OS_Handle handle = { 0 };
handle.u64[0] = (U64)window;
return handle;
}
root_function OS_W32_Window*
OS_W32_window_from_handle(OS_Handle handle)
{
OS_W32_Window *window = (OS_W32_Window *)handle.u64[0];
return window;
}
root_function OS_Handle
OS_window_open(OS_Window_Flags flags, Vec2_S64 size, String8 title)
{
OS_Handle handle = { 0 };
{
// Window allocation
OS_W32_Window *window = os_g_w32_gfx_state->free_window;
{
// Windows are stored in a stack on the gfx state
if (window != 0)
{
StackPop(os_g_w32_gfx_state->free_window);
}
else
{
window = PushArray(os_g_w32_gfx_state->window_arena, OS_W32_Window, 1);
}
MemoryZeroStruct(window);
DLLPushBack(os_g_w32_gfx_state->first_window, os_g_w32_gfx_state->last_window, window);
}
// Open window
HWND hwnd = 0;
HDC hdc = 0;
{
ArenaTemp scratch = scratch_get(0, 0);
String16 title16 = str16_from8(scratch.arena, title);
hwnd = CreateWindowExW(0,
OS_W32_GraphicalWindowClassName, (LPCWSTR)title16.str,
WS_OVERLAPPEDWINDOW | WS_VISIBLE,
100, 100,
size.x, size.y, 0, 0, os_g_w32_hinstance, 0);
hdc = GetDC(hwnd);
SetWindowLongPtr(hwnd, GWLP_USERDATA, (LONG_PTR)window);
scratch_release(scratch);
}
{
window->hwnd = hwnd;
window->hdc = hdc;
}
handle = OS_W32_handle_from_window(window);
}
return handle;
}
function LRESULT
OS_W32_window_proc(HWND hwnd, UINT message, WPARAM w_param, LPARAM l_param)
{
LRESULT result = 0;
OS_Event *event = 0;
OS_W32_Window *window = (OS_W32_Window *)GetWindowLongPtr(hwnd, GWLP_USERDATA);
OS_Handle window_handle = OS_W32_handle_from_window(window);
ArenaTemp scratch = scratch_get(&os_w32_tl_events_arena, 1);
OS_EventList fallback_event_list = {0};
if(os_w32_tl_events_arena == 0)
{
os_w32_tl_events_arena = scratch.arena;
os_w32_tl_events_list = &fallback_event_list;
}
B32 is_release = 0;
Axis2 scroll_axis = Axis2_Y;
switch(message)
{
default:
{
result = DefWindowProcW(hwnd, message, w_param, l_param);
} break;
//- General window events
case WM_CLOSE:
{
event = PushArray(os_w32_tl_events_arena, OS_Event, 1);
event->kind = OS_EventKind_WindowClose;
event->window = window_handle;
} break;
//- Mouse buttons
case WM_LBUTTONUP:
case WM_MBUTTONUP:
case WM_RBUTTONUP:
{
ReleaseCapture();
is_release = 1;
} fallthrough;
case WM_LBUTTONDOWN:
case WM_MBUTTONDOWN:
case WM_RBUTTONDOWN:
{
if(is_release == 0)
{
SetCapture(hwnd);
}
OS_EventKind kind = is_release ? OS_EventKind_Release : OS_EventKind_Press;
OS_Key key = OS_Key_MouseLeft;
switch(message)
{
case WM_MBUTTONUP: case WM_MBUTTONDOWN: key = OS_Key_MouseMiddle; break;
case WM_RBUTTONUP: case WM_RBUTTONDOWN: key = OS_Key_MouseRight; break;
}
event = PushArray(os_w32_tl_events_arena, OS_Event, 1);
event->kind = kind;
event->window = window_handle;
event->key = key;
event->position = OS_mouse_from_window(window_handle);
} break;
//- Keyboard events
case WM_SYSKEYDOWN: case WM_SYSKEYUP:
{
result = DefWindowProcW(hwnd, message, w_param, l_param);
} fallthrough;
case WM_KEYDOWN:
case WM_KEYUP:
{
// TODO(anton): Just check this thing with was down, is down.., WINAPI crap
B32 was_down = !!(l_param & (1 << 30));
B32 is_down = !(l_param & (1 << 31));
OS_EventKind kind = is_down ? OS_EventKind_Press : OS_EventKind_Release;
// TODO(anton): Here we use statics but maybe we should not...
// Could just move this out and pre-init or generate it and include or whatever...
// probably should just be in some meta header.
local_persist OS_Key key_table[256] = {0};
local_persist B32 key_table_initialised = 0;
if(!key_table_initialised)
{
key_table_initialised = 1;
for (U32 i = 'A', j = OS_Key_A; i <= 'Z'; i += 1, j += 1)
{
key_table[i] = (OS_Key)j;
}
for (U32 i = '0', j = OS_Key_0; i <= '9'; i += 1, j += 1)
{
key_table[i] = (OS_Key)j;
}
for (U32 i = VK_F1, j = OS_Key_F1; i <= VK_F24; i += 1, j += 1)
{
key_table[i] = (OS_Key)j;
}
key_table[VK_ESCAPE] = OS_Key_Esc;
key_table[VK_OEM_3] = OS_Key_GraveAccent;
key_table[VK_OEM_MINUS] = OS_Key_Minus;
key_table[VK_OEM_PLUS] = OS_Key_Equal;
key_table[VK_BACK] = OS_Key_Backspace;
key_table[VK_TAB] = OS_Key_Tab;
key_table[VK_SPACE] = OS_Key_Space;
key_table[VK_RETURN] = OS_Key_Enter;
key_table[VK_CONTROL] = OS_Key_Ctrl;
key_table[VK_SHIFT] = OS_Key_Shift;
key_table[VK_MENU] = OS_Key_Alt;
key_table[VK_UP] = OS_Key_Up;
key_table[VK_LEFT] = OS_Key_Left;
key_table[VK_DOWN] = OS_Key_Down;
key_table[VK_RIGHT] = OS_Key_Right;
key_table[VK_DELETE] = OS_Key_Delete;
key_table[VK_PRIOR] = OS_Key_PageUp;
key_table[VK_NEXT] = OS_Key_PageDown;
key_table[VK_HOME] = OS_Key_Home;
key_table[VK_END] = OS_Key_End;
key_table[VK_OEM_2] = OS_Key_ForwardSlash;
key_table[VK_OEM_PERIOD] = OS_Key_Period;
key_table[VK_OEM_COMMA] = OS_Key_Comma;
key_table[VK_OEM_7] = OS_Key_Quote;
key_table[VK_OEM_4] = OS_Key_LeftBracket;
key_table[VK_OEM_6] = OS_Key_RightBracket;
key_table[VK_INSERT] = OS_Key_Insert;
key_table[VK_OEM_1] = OS_Key_Semicolon;
}
OS_Key key = OS_Key_Null;
if(w_param < ArrayCount(key_table))
{
key = key_table[w_param];
}
event = PushArray(os_w32_tl_events_arena, OS_Event, 1);
event->kind = kind;
event->window = window_handle;
event->key = key;
} break;
}
// If we registered an event we push it to the event list.
if(event)
{
DLLPushBack(os_w32_tl_events_list->first, os_w32_tl_events_list->last, event);
os_w32_tl_events_list->count += 1;
}
scratch_release(scratch);
return result;
}
root_function Vec2_F32
OS_mouse_from_window(OS_Handle handle)
{
Vec2_F32 result = vec2_F32(-100, -100);
OS_W32_Window *window = OS_W32_window_from_handle(handle);
if(window != 0)
{
POINT point;
if(GetCursorPos(&point))
{
if(ScreenToClient(window->hwnd, &point))
{
result = vec2_F32(point.x, point.y);
}
}
}
return result;
}
root_function OS_EventList
OS_get_events(Arena* arena)
{
OS_EventList list = {0};
os_w32_tl_events_arena = arena;
os_w32_tl_events_list = &list;
for(MSG message; PeekMessage(&message, 0, 0, 0, PM_REMOVE);)
{
TranslateMessage(&message);
DispatchMessage(&message);
}
os_w32_tl_events_arena = 0;
os_w32_tl_events_list = 0;
return list;
}
root_function void
OS_consume_event(OS_EventList *events, OS_Event *event)
{
DLLRemove(events->first, events->last, event);
events->count -= 1;
event->kind = OS_EventKind_Null;
}
root_function void
OS_window_first_paint(OS_Handle handle)
{
ArenaTemp scratch = scratch_get(0,0);
OS_W32_Window *window = OS_W32_window_from_handle(handle);
ShowWindow(window->hwnd, SW_SHOW);
UpdateWindow(window->hwnd);
scratch_release(scratch);
}

36
src/os/win32/os_gfx_win32.h
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#ifndef OS_GFX_WIN32_H
#define OS_GFX_WIN32_H
typedef struct OS_W32_Window OS_W32_Window;
struct OS_W32_Window
{
OS_W32_Window *next;
OS_W32_Window *prev;
HWND hwnd;
HDC hdc;
};
typedef struct OS_W32_Gfx_State OS_W32_Gfx_State;
struct OS_W32_Gfx_State
{
Arena *arena;
HWND global_hwnd;
HDC global_hdc;
Arena *window_arena;
OS_W32_Window *first_window;
OS_W32_Window *last_window;
OS_W32_Window *free_window;
};
root_global OS_W32_Gfx_State *os_g_w32_gfx_state = 0;
extern per_thread Arena *os_w32_tl_events_arena = 0;
extern per_thread OS_EventList *os_w32_tl_events_list = 0;
root_function OS_Handle OS_W32_handle_from_window(OS_W32_Window *window);
root_function OS_W32_Window *OS_W32_window_from_handle(OS_Handle handle);
function LRESULT OS_W32_window_proc(HWND hwnd, UINT message, WPARAM w_param, LPARAM l_param);
#endif // OS_GFX_WIN32_H

798
src/render/d3d11/render_d3d11.c
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// Global tables generated by the metadesk code in Ryan's codebase,
// here I do them by hand, for now
//////////////////////////////////
//~ Input element descriptions
global D3D11_INPUT_ELEMENT_DESC r_d3d11_g_rect2d_input_layout_elems[] =
{
{"POS", 0, DXGI_FORMAT_R32G32B32A32_FLOAT, 0,
0, D3D11_INPUT_PER_INSTANCE_DATA, 1},
{"TEX", 0, DXGI_FORMAT_R32G32B32A32_FLOAT, 0,
D3D11_APPEND_ALIGNED_ELEMENT, D3D11_INPUT_PER_INSTANCE_DATA, 1},
{"COL", 0, DXGI_FORMAT_R32G32B32A32_FLOAT, 0,
D3D11_APPEND_ALIGNED_ELEMENT, D3D11_INPUT_PER_INSTANCE_DATA, 1},
{"COL", 1, DXGI_FORMAT_R32G32B32A32_FLOAT, 0,
D3D11_APPEND_ALIGNED_ELEMENT, D3D11_INPUT_PER_INSTANCE_DATA, 1},
{"COL", 2, DXGI_FORMAT_R32G32B32A32_FLOAT, 0,
D3D11_APPEND_ALIGNED_ELEMENT, D3D11_INPUT_PER_INSTANCE_DATA, 1},
{"COL", 3, DXGI_FORMAT_R32G32B32A32_FLOAT, 0,
D3D11_APPEND_ALIGNED_ELEMENT, D3D11_INPUT_PER_INSTANCE_DATA, 1},
{ "CRAD", 0, DXGI_FORMAT_R32G32B32A32_FLOAT, 0,
D3D11_APPEND_ALIGNED_ELEMENT, D3D11_INPUT_PER_INSTANCE_DATA, 1 },
{"STY", 0, DXGI_FORMAT_R32G32B32A32_FLOAT, 0,
D3D11_APPEND_ALIGNED_ELEMENT, D3D11_INPUT_PER_INSTANCE_DATA, 1},
};
global R_D3D11_CmdGlobalKindInfo r_d3d11_g_cmd_global_kind_info_table[R_D3D11_CmdGlobalKind_COUNT] =
{
{0}, // Nil
{sizeof(R_D3D11_CmdGlobals_Rect2D)},
};
R_D3D11_ShaderPairKindInfo r_d3d11_g_shader_pair_kind_info_table[R_D3D11_ShaderPairKind_COUNT] = {0};
global R_D3D11_State *r_d3d11_state;
//////////////////////////////////
//~ Render helpers
// Create a buffer holding all the instance data for a current batch
r_function ID3D11Buffer *
R_D3D11_instance_buffer_from_batch_list(R_BatchList *list)
{
U64 needed_size = list->byte_count;
if(needed_size > Kilobytes(64))
{
break_debugger();
}
ID3D11Buffer *buffer = r_d3d11_state->scratch_buffer_64kb;
D3D11_MAPPED_SUBRESOURCE sub_resource = {0};
ID3D11DeviceContext_Map(r_d3d11_state->base_device_context, (ID3D11Resource *)buffer, 0,
D3D11_MAP_WRITE_DISCARD, 0, &sub_resource);
U8 *ptr = (U8 *)sub_resource.pData;
for(R_Batch *batch = list->first; batch != 0; batch = batch->next)
{
MemoryCopy(ptr, batch->v, batch->byte_count);
ptr += batch->byte_count;
}
ID3D11DeviceContext_Unmap(r_d3d11_state->base_device_context, (ID3D11Resource *)buffer, 0);
return buffer;
}
// Temporary initialisation of the shader table, probably we just keep reading the shader src from file here
// in the end, and we generate a table through metaprogramming.
r_function void
R_D3D11_initialise_shader_table(Arena* shader_src_arena)
{
String8 shader_paths[R_D3D11_ShaderPairKind_COUNT] = {0};
shader_paths[R_D3D11_ShaderPairKind_Rect2D] =
str8_lit("D:\\dev\\app_codebase\\src\\render\\d3d11\\shaders\\rect2d.hlsl");
String8 shader_name[R_D3D11_ShaderPairKind_COUNT] = {0};
shader_name[R_D3D11_ShaderPairKind_Rect2D] = str8_lit("r_d3d11_g_rect2d_shader_src");
for(R_D3D11_ShaderPairKind kind = (R_D3D11_ShaderPairKind)(R_D3D11_ShaderPairKind_Nil+1);
kind < R_D3D11_ShaderPairKind_COUNT;
kind = (R_D3D11_ShaderPairKind)(kind+1))
{
// We're on windows anyway so might as well
OS_Handle file = OS_file_open(OS_AccessFlag_Read, shader_paths[kind]);
OS_FileAttributes attrs = OS_attributes_from_file(file);
String8 shader_src = OS_file_read(shader_src_arena, file, 0, attrs.size);
r_d3d11_g_shader_pair_kind_info_table[kind].name = shader_name[kind];
r_d3d11_g_shader_pair_kind_info_table[kind].shader_blob = shader_src;
if(kind == R_D3D11_ShaderPairKind_Rect2D) {
r_d3d11_g_shader_pair_kind_info_table[kind].element_description = r_d3d11_g_rect2d_input_layout_elems;
r_d3d11_g_shader_pair_kind_info_table[kind].element_description_count =
ArrayCount(r_d3d11_g_rect2d_input_layout_elems);
}
OS_file_close(file);
}
}
r_function DXGI_FORMAT
R_D3D11_DXGI_format_from_tex2d_format(R_Tex2DFormat format)
{
DXGI_FORMAT result = DXGI_FORMAT_R8G8B8A8_UNORM;
switch(format)
{
case R_Tex2DFormat_R8: { result = DXGI_FORMAT_R8_UNORM; } break;
default:
case R_Tex2DFormat_RGBA8: {} break;
}
return result;
}
r_function R_D3D11_Tex2D
R_D3D11_tex2d_from_handle(R_Handle handle)
{
R_D3D11_Tex2D tex = {0};
tex.texture = (ID3D11Texture2D *)handle.u64[0];
tex.view = (ID3D11ShaderResourceView *)handle.u64[1];
tex.size.x = handle.u32[4];
tex.size.y = handle.u32[5];
tex.format = (R_Tex2DFormat)handle.u32[6];
tex.kind = (R_Tex2DKind)handle.u32[7];
return tex;
}
r_function R_Handle
R_D3D11_handle_from_tex2d(R_D3D11_Tex2D texture)
{
R_Handle result = {0};
result.u64[0] = (U64)texture.texture;
result.u64[1] = (U64)texture.view;
result.u32[4] = texture.size.x;
result.u32[5] = texture.size.y;
result.u32[6] = texture.format;
result.u32[7] = texture.kind;
return result;
}
////////////////////////////////////////////////////////////////////////////////////////////////////////
//~ Backend hooks, ie implementations of the render backend abstraction (render_core.h)
//
// This initialises the D3D11 layer. We have a big struct that holds all the state.
// How this is done in RJFs codebase really looks like the mmozeiko example but with the big
// global struct holding the state. The Hidden Grove (rjf) uses the C++ style though, and
// also the d3d11_1 header which extends d3d11 in some way... But I will reproduce mmozeiko's C example here.
r_function R_InitReceipt
R_init(OS_InitReceipt os_init, OS_InitGfxReceipt os_gfx_init)
{
if(is_main_thread() && r_d3d11_state == 0)
{
Arena *arena = m_make_arena_reserve(Gigabytes(16));
r_d3d11_state = PushArray(arena, R_D3D11_State, 1);
r_d3d11_state->arena = arena;
HRESULT hr;
// Create D3D11 device & context
UINT flags = 0;
#if BUILD_DEBUG
flags |= D3D11_CREATE_DEVICE_DEBUG;
#endif
D3D_FEATURE_LEVEL feature_levels[] = { D3D_FEATURE_LEVEL_11_0 };
hr = D3D11CreateDevice(
0, // Primary adapter chosen automatically if null
D3D_DRIVER_TYPE_HARDWARE,
0, // null for non-softweare driver types
flags,
feature_levels,
ArrayCount(feature_levels),
D3D11_SDK_VERSION,
&r_d3d11_state->base_device,
0,
&r_d3d11_state->base_device_context
);
AssertHR(hr);
// Enable useful debug messages and breaks
#if BUILD_DEBUG
// for debug builds enable VERY USEFUL debug break on API errors
{
ID3D11InfoQueue* info;
ID3D11Device_QueryInterface(r_d3d11_state->base_device, &IID_ID3D11InfoQueue, (void**)&info);
ID3D11InfoQueue_SetBreakOnSeverity(info, D3D11_MESSAGE_SEVERITY_CORRUPTION, TRUE);
ID3D11InfoQueue_SetBreakOnSeverity(info, D3D11_MESSAGE_SEVERITY_ERROR, TRUE);
ID3D11InfoQueue_Release(info);
}
// enable debug break for DXGI too
{
IDXGIInfoQueue* dxgiInfo;
hr = DXGIGetDebugInterface1(0, &IID_IDXGIInfoQueue, (void**)&dxgiInfo);
AssertHR(hr);
IDXGIInfoQueue_SetBreakOnSeverity(dxgiInfo, DXGI_DEBUG_ALL, DXGI_INFO_QUEUE_MESSAGE_SEVERITY_CORRUPTION, TRUE);
IDXGIInfoQueue_SetBreakOnSeverity(dxgiInfo, DXGI_DEBUG_ALL, DXGI_INFO_QUEUE_MESSAGE_SEVERITY_ERROR, TRUE);
IDXGIInfoQueue_Release(dxgiInfo);
}
// NOTE(anton): from mmozeiko's gist:
// "after this there's no need to check for any errors on device functions manually
// so all HRESULT return values in this code will be ignored
// debugger will break on errors anyway"
// TODO(anton): Remove AssertHR and use of hr below to check this.
#endif
// Create objects for swapchain-creation (dxgi)
{
hr = ID3D11Device_QueryInterface(r_d3d11_state->base_device,
&IID_IDXGIDevice, (void **)&r_d3d11_state->dxgi_device);
AssertHR(hr);
hr = IDXGIDevice_GetAdapter(r_d3d11_state->dxgi_device, &r_d3d11_state->dxgi_adapter);
AssertHR(hr);
hr = IDXGIAdapter_GetParent(r_d3d11_state->dxgi_adapter, &IID_IDXGIFactory2,
(void **)&r_d3d11_state->dxgi_factory2);
AssertHR(hr);
}
}
//- Set up initial pipeline state
{
D3D11_RASTERIZER_DESC desc =
{
.FillMode = D3D11_FILL_SOLID,
.CullMode = D3D11_CULL_NONE,
.DepthClipEnable = TRUE,
};
ID3D11Device_CreateRasterizerState(r_d3d11_state->base_device, &desc, &r_d3d11_state->rasterizer_state);
}
{
{
D3D11_SAMPLER_DESC desc = {0};
{
desc.Filter = D3D11_FILTER_MIN_MAG_MIP_POINT;
desc.AddressU = D3D11_TEXTURE_ADDRESS_WRAP;
desc.AddressV = D3D11_TEXTURE_ADDRESS_WRAP;
desc.AddressW = D3D11_TEXTURE_ADDRESS_WRAP;
desc.ComparisonFunc = D3D11_COMPARISON_NEVER;
}
//r_d3d11_state->device->CreateSamplerState(&desc, &r_d3d11_state->nearest_sampler);
ID3D11Device_CreateSamplerState(r_d3d11_state->base_device, &desc, &r_d3d11_state->nearest_sampler);
}
{
D3D11_SAMPLER_DESC desc = {0};
{
desc.Filter = D3D11_FILTER_MIN_MAG_MIP_LINEAR;
desc.AddressU = D3D11_TEXTURE_ADDRESS_WRAP;
desc.AddressV = D3D11_TEXTURE_ADDRESS_WRAP;
desc.AddressW = D3D11_TEXTURE_ADDRESS_WRAP;
desc.ComparisonFunc = D3D11_COMPARISON_NEVER;
}
//r_d3d11_state->device->CreateSamplerState(&desc, &r_d3d11_state->linear_sampler);
ID3D11Device_CreateSamplerState(r_d3d11_state->base_device, &desc, &r_d3d11_state->linear_sampler);
}
}
{
D3D11_BLEND_DESC desc =
{
.RenderTarget[0] =
{
.BlendEnable = TRUE,
.SrcBlend = D3D11_BLEND_SRC_ALPHA,
.DestBlend = D3D11_BLEND_INV_SRC_ALPHA,
.BlendOp = D3D11_BLEND_OP_ADD,
.SrcBlendAlpha = D3D11_BLEND_SRC_ALPHA,
.DestBlendAlpha = D3D11_BLEND_INV_SRC_ALPHA,
.BlendOpAlpha = D3D11_BLEND_OP_ADD,
.RenderTargetWriteMask = D3D11_COLOR_WRITE_ENABLE_ALL,
},
};
ID3D11Device_CreateBlendState(r_d3d11_state->base_device, &desc, &r_d3d11_state->main_blend_state);
}
{
D3D11_DEPTH_STENCIL_DESC desc =
{
.DepthEnable = FALSE,
.DepthWriteMask = D3D11_DEPTH_WRITE_MASK_ALL,
.DepthFunc = D3D11_COMPARISON_LESS,
.StencilEnable = FALSE,
.StencilReadMask = D3D11_DEFAULT_STENCIL_READ_MASK,
.StencilWriteMask = D3D11_DEFAULT_STENCIL_WRITE_MASK
};
ID3D11Device_CreateDepthStencilState(r_d3d11_state->base_device, &desc,
&r_d3d11_state->depth_stencil_state);
}
//- Global command buffer creation
// Loop over the kind enums that are also the indices into the tables
for(R_D3D11_CmdGlobalKind kind = (R_D3D11_CmdGlobalKind)(R_D3D11_CmdGlobalKind_Nil+1);
kind < R_D3D11_CmdGlobalKind_COUNT;
kind = (R_D3D11_CmdGlobalKind)(kind + 1))
{
D3D11_BUFFER_DESC desc = {0};
// The ByteWidth of the buffer is the size of the CmdGlobalKind struct as defined in the table.
// Then we align it to 16 bytes by adding 15 and subtracting the size mod 16.
desc.ByteWidth = r_d3d11_g_cmd_global_kind_info_table[kind].size;
desc.ByteWidth += 15;
desc.ByteWidth -= desc.ByteWidth % 16;
desc.Usage = D3D11_USAGE_DYNAMIC;
desc.BindFlags = D3D11_BIND_CONSTANT_BUFFER;
desc.CPUAccessFlags = D3D11_CPU_ACCESS_WRITE;
ID3D11Device_CreateBuffer(r_d3d11_state->base_device, &desc, 0 /* subresource data*/,
&r_d3d11_state->cmd_global_buffer_table[kind]);
}
// Temporary hold the source code of the shaders so we can compile them
Arena* shader_src_arena = m_make_arena_reserve(Megabytes(8));
R_D3D11_initialise_shader_table(shader_src_arena);
//- Create shader objects
for(R_D3D11_ShaderPairKind kind = (R_D3D11_ShaderPairKind)(R_D3D11_ShaderPairKind_Nil+1);
kind < R_D3D11_ShaderPairKind_COUNT;
kind = (R_D3D11_ShaderPairKind)(kind + 1))
{
R_D3D11_ShaderPairKindInfo *info = &r_d3d11_g_shader_pair_kind_info_table[kind];
// Compile vertex shader
ID3DBlob *vs_src_blob = 0;
ID3DBlob *vs_src_errors = 0;
ID3D11VertexShader *vs = 0;
String8 vs_errors = {0};
HRESULT hr;
{
hr = D3DCompile(info->shader_blob.str, info->shader_blob.size, (char *)info->name.str, 0, 0,
"vs_main", "vs_5_0", 0 /* flags */, 0, &vs_src_blob, &vs_src_errors);
if(vs_src_errors)
{
vs_errors = str8( (U8 *)ID3D10Blob_GetBufferPointer(vs_src_errors),
(U64)ID3D10Blob_GetBufferSize(vs_src_errors));
break_debugger();
}
else
{
ID3D11Device_CreateVertexShader(r_d3d11_state->base_device, ID3D10Blob_GetBufferPointer(vs_src_blob),
ID3D10Blob_GetBufferSize(vs_src_blob), 0, &vs);
}
}
// Make input layout
ID3D11InputLayout *input_layout = 0;
if(info->element_description != 0)
{
ID3D11Device_CreateInputLayout(r_d3d11_state->base_device, info->element_description,
info->element_description_count,
ID3D10Blob_GetBufferPointer(vs_src_blob), ID3D10Blob_GetBufferSize(vs_src_blob),
&input_layout);
}
// Compile pixel shader
ID3DBlob *ps_src_blob = 0;
ID3DBlob *ps_src_errors = 0;
ID3D11PixelShader *ps = 0;
String8 ps_errors = {0};
{
hr = D3DCompile(info->shader_blob.str, info->shader_blob.size, (char *)info->name.str, 0, 0,
"ps_main", "ps_5_0", 0, 0, &ps_src_blob, &ps_src_errors);
if(ps_src_errors)
{
ps_errors = str8( (U8 *)ID3D10Blob_GetBufferPointer(ps_src_errors),
(U64)ID3D10Blob_GetBufferSize(ps_src_errors));
break_debugger();
}
else
{
ID3D11Device_CreatePixelShader(r_d3d11_state->base_device, ID3D10Blob_GetBufferPointer(ps_src_blob),
ID3D10Blob_GetBufferSize(ps_src_blob), 0, &ps);
}
}
// Store in state
r_d3d11_state->input_layout_table[kind] = input_layout;
r_d3d11_state->vs_table[kind] = vs;
r_d3d11_state->ps_table[kind] = ps;
ID3D10Blob_Release(vs_src_blob);
ID3D10Blob_Release(ps_src_blob);
}
m_arena_release(shader_src_arena);
//- Scratch buffer resources
// 64k
{
D3D11_BUFFER_DESC desc = {0};
{
desc.ByteWidth = Kilobytes(64);
desc.Usage = D3D11_USAGE_DYNAMIC;
desc.BindFlags = D3D11_BIND_VERTEX_BUFFER;
desc.CPUAccessFlags = D3D11_CPU_ACCESS_WRITE;
}
ID3D11Device_CreateBuffer(r_d3d11_state->base_device, &desc, 0, &r_d3d11_state->scratch_buffer_64kb);
}
R_InitReceipt out = {0};
return out;
}
// This creates the swapchain and attaches it to the OS handle.
// Since we want to be able to do this dynamically we will store the necessary creation objects in
// the D3D11 state struct (dxgi device, adapter, factory2).
r_function R_Handle
R_window_equip(OS_Handle window_handle)
{
// We are just doing regular OS alloc for this, ie no arena.
R_D3D11_WindowEquip *equip = (R_D3D11_WindowEquip *)OS_reserve(sizeof(R_D3D11_WindowEquip));
OS_commit(equip, sizeof(*equip));
OS_W32_Window *window = (OS_W32_Window *)window_handle.u64[0];
HWND hwnd = window->hwnd;
DXGI_SWAP_CHAIN_DESC1 swapchain_desc =
{
// default 0 value for width & height means to get it from HWND automatically
//.Width = 0,
//.Height = 0,
// or use DXGI_FORMAT_R8G8B8A8_UNORM_SRGB for storing sRGB
.Format = DXGI_FORMAT_R8G8B8A8_UNORM,
// FLIP presentation model does not allow MSAA framebuffer
// if you want MSAA then you'll need to render offscreen and manually
// resolve to non-MSAA framebuffer
.SampleDesc = { 1, 0 },
.BufferUsage = DXGI_USAGE_RENDER_TARGET_OUTPUT,
.BufferCount = 2,
// we don't want any automatic scaling of window content
// this is supported only on FLIP presentation model
.Scaling = DXGI_SCALING_NONE,
// use more efficient FLIP presentation model
// Windows 10 allows to use DXGI_SWAP_EFFECT_FLIP_DISCARD
// for Windows 8 compatibility use DXGI_SWAP_EFFECT_FLIP_SEQUENTIAL
// for Windows 7 compatibility use DXGI_SWAP_EFFECT_DISCARD
.SwapEffect = DXGI_SWAP_EFFECT_FLIP_DISCARD,
};
HRESULT hr = IDXGIFactory2_CreateSwapChainForHwnd(
r_d3d11_state->dxgi_factory2,
(IUnknown *)r_d3d11_state->base_device,
hwnd,
&swapchain_desc,
0, 0,
&equip->swapchain
);
IDXGISwapChain1_GetBuffer(equip->swapchain, 0, &IID_ID3D11Texture2D, (void **)(&equip->framebuffer));
ID3D11Device_CreateRenderTargetView(r_d3d11_state->base_device, (ID3D11Resource*)equip->framebuffer,
0, &equip->framebuffer_rtv);
IDXGIFactory_MakeWindowAssociation(r_d3d11_state->dxgi_factory2, hwnd, DXGI_MWA_NO_ALT_ENTER);
return R_D3D11_handle_from_window_equip(equip);
}
r_function void
R_window_unequip(OS_Handle window, R_Handle window_equip)
{
R_D3D11_WindowEquip *equip = R_D3D11_window_equip_from_handle(window_equip);
if(equip->framebuffer_rtv) { ID3D11RenderTargetView_Release(equip->framebuffer_rtv); }
if(equip->framebuffer) { ID3D11Texture2D_Release(equip->framebuffer); }
if(equip->swapchain) { IDXGISwapChain_Release(equip->swapchain); }
OS_release(equip, sizeof(*equip));
}
// The render handle is a nice way to abstract way whatever different ways to describe the
// swapchain we have in different graphics APIs... so we just get and set a pointer with these utilities.
r_function R_Handle
R_D3D11_handle_from_window_equip(R_D3D11_WindowEquip *equip)
{
R_Handle handle = {0};
handle.u64[0] = (U64)equip;
return handle;
}
r_function R_D3D11_WindowEquip *
R_D3D11_window_equip_from_handle(R_Handle handle)
{
R_D3D11_WindowEquip *result = (R_D3D11_WindowEquip *)handle.u64[0];
return result;
}
r_function void
R_frame_begin(void)
{
// NOTE(anton): No-op
// TODO(anton): But why is there no-op here? Comment this
}
r_function void
R_frame_end(void)
{
// TODO(anton): Implement and understand OverflowBufferNode stuff
}
r_function void
R_window_start(R_Handle window_equip_handle, Vec2_S64 resolution)
{
R_D3D11_WindowEquip *wnd = R_D3D11_window_equip_from_handle(window_equip_handle);
// TODO(anton): Ryan uses Device1 and Context1 here, I need to understand why and know the difference.
ID3D11Device *device = r_d3d11_state->base_device;
ID3D11DeviceContext *d_ctx = r_d3d11_state->base_device_context;
B32 resolution_changed = (wnd->last_resolution.x != resolution.x ||
wnd->last_resolution.y != resolution.y);
wnd->last_resolution = resolution;
// If the resolution changed we need to remake
// the swap chain and framebuffer.
if(resolution_changed)
{
ID3D11RenderTargetView_Release(wnd->framebuffer_rtv);
ID3D11Texture2D_Release(wnd->framebuffer);
// NOTE(anton): Since we are getting the buffers again I think we can resize it to zero here rather
// than to the resolution as is done in mmozeiko example?
HRESULT hr = IDXGISwapChain1_ResizeBuffers(wnd->swapchain, 0,
/* width*/0, /* height */0, DXGI_FORMAT_UNKNOWN, 0);
if(FAILED(hr))
{
break_debugger();
}
IDXGISwapChain1_GetBuffer(wnd->swapchain, 0, &IID_ID3D11Texture2D, (void**)(&wnd->framebuffer));
ID3D11Device_CreateRenderTargetView(device, (ID3D11Resource*)wnd->framebuffer,
0, &wnd->framebuffer_rtv);
}
// Clear color
Vec4_F32 clear_color = {0};
clear_color.x = 0.2f;
clear_color.y = 0.4f;
clear_color.z = 0.6f;
ID3D11DeviceContext_ClearRenderTargetView(d_ctx, wnd->framebuffer_rtv, clear_color.v);
}
r_function void
R_window_submit(R_Handle window_equip, R_PassList *pass_list)
{
R_D3D11_WindowEquip *wnd = R_D3D11_window_equip_from_handle(window_equip);
ID3D11DeviceContext *d_ctx = r_d3d11_state->base_device_context;
R_PassNode *pass_node = pass_list->first;
R_Pass *pass = &pass_node->v;
R_PassParams_UI* params = pass->params_ui;
//- Draw rectangle batches
for(R_BatchGroup2DNode *group_node = params->rects.first; group_node != 0; group_node = group_node->next)
{
// Unpack node
R_BatchList *batches = &group_node->batches;
R_BatchGroup2DParams *batch_params = &group_node->params;
ID3D11Buffer *instance_buffer = R_D3D11_instance_buffer_from_batch_list(batches);
U64 instance_count = batches->instance_count;
U64 bytes_per_instance = batches->byte_count/batches->instance_count;
R_Handle albedo_texture_handle = batch_params->albedo_tex;
R_D3D11_Tex2D albedo_texture = R_D3D11_tex2d_from_handle(albedo_texture_handle);
if(R_handle_is_zero(batch_params->albedo_tex))
{
break_debugger();
}
ID3D11SamplerState *sampler = r_d3d11_state->linear_sampler;
R_Tex2DSampleKind sample_kind = batch_params->albedo_tex_sample_kind;
switch(sample_kind)
{
default:
case R_Tex2DSampleKind_Nearest: { sampler = r_d3d11_state->nearest_sampler; } break;
case R_Tex2DSampleKind_Linear: { sampler = r_d3d11_state->linear_sampler; } break;
}
/*
Vec2_F32 clip_min = vec2_F32(
Clamp(0, Min(batch_params->clip.x0, batch_params->clip.x1), wnd->last_resolution.x),
Clamp(0, Min(batch_params->clip.y0, batch_params->clip.y1), wnd->last_resolution.y)
);
Vec2_F32 clip_max = vec2_F32(
Clamp(0, Max(batch_params->clip.x0, batch_params->clip.x1), wnd->last_resolution.x),
Clamp(0, Max(batch_params->clip.y0, batch_params->clip.y1), wnd->last_resolution.y)
);
*/
//Rng2_F32 clip = rng2_F32(vec2_F32(0,0), vec2_F32(wnd->last_resolution.x, wnd->last_resolution.y));
// Viewport and rasteriser
{
Vec2_S64 resolution = wnd->last_resolution;
D3D11_VIEWPORT d3d11_viewport = { 0.0f, 0.0f, (F32)resolution.x, (F32)resolution.y, 0.0f, 1.0f };
if(params->viewport.x0 != 0 || params->viewport.x1 != 0 ||
params->viewport.y0 != 0 || params->viewport.y1 != 0)
{
Vec2_F32 dim = dim2_F32(params->viewport);
d3d11_viewport.TopLeftX = params->viewport.x0;
d3d11_viewport.TopLeftY = params->viewport.y0;
d3d11_viewport.Width = dim.x;
d3d11_viewport.Height = dim.y;
}
ID3D11DeviceContext_RSSetViewports(d_ctx, 1, &d3d11_viewport);
ID3D11DeviceContext_RSSetState(d_ctx, r_d3d11_state->rasterizer_state);
}
// Scissor rect
{
D3D11_RECT rect =
{
/* .left = */ 0,
/* .top = */ 0,
/* .right = */ (LONG)wnd->last_resolution.x,
/* .bottom = */ (LONG)wnd->last_resolution.y,
};
/* if(clip.x0 != 0 || clip.y0 != 0 || clip.x1 != 0 || clip.y1 != 0) */
/* { */
/* rect.left = (LONG)clip.x0; */
/* rect.right = (LONG)clip.x1; */
/* rect.top = (LONG)clip.y0; */
/* rect.bottom = (LONG)clip.y1; */
/* } */
ID3D11DeviceContext_RSSetScissorRects(d_ctx, 1, &rect);
}
// Output merger
{
ID3D11DeviceContext_OMSetRenderTargets(d_ctx, 1, &wnd->framebuffer_rtv, 0);
ID3D11DeviceContext_OMSetBlendState(d_ctx, r_d3d11_state->main_blend_state, 0, 0xffffffff);
ID3D11DeviceContext_OMSetDepthStencilState(d_ctx, r_d3d11_state->depth_stencil_state, 0);
}
// Get pipeline objects
ID3D11Buffer *cmd_global_buffer = r_d3d11_state->cmd_global_buffer_table[R_D3D11_CmdGlobalKind_Rect2D];
ID3D11VertexShader *vs = r_d3d11_state->vs_table[R_D3D11_ShaderPairKind_Rect2D];
ID3D11PixelShader *ps = r_d3d11_state->ps_table[R_D3D11_ShaderPairKind_Rect2D];
ID3D11InputLayout *input_layout = r_d3d11_state->input_layout_table[R_D3D11_ShaderPairKind_Rect2D];
// Send per-cmd globals
R_D3D11_CmdGlobals_Rect2D cmd_globals = {0};
{
cmd_globals.viewport_size = vec2_F32_from_vec(wnd->last_resolution);
cmd_globals.albedo_t2d_size = vec2_F32_from_vec(albedo_texture.size);
cmd_globals.transform[0] = vec3_F32(batch_params->xform2d.elements[0][0],
batch_params->xform2d.elements[1][0],
batch_params->xform2d.elements[2][0]);
cmd_globals.transform[1] = vec3_F32(batch_params->xform2d.elements[0][1],
batch_params->xform2d.elements[1][1],
batch_params->xform2d.elements[2][1]);
cmd_globals.transform[2] = vec3_F32(batch_params->xform2d.elements[0][2],
batch_params->xform2d.elements[1][2],
batch_params->xform2d.elements[2][2]);
}
// TODO(anton): Make this into a function
{
D3D11_MAPPED_SUBRESOURCE sub_resource = {0};
ID3D11DeviceContext_Map(d_ctx, (ID3D11Resource *)cmd_global_buffer, 0,
D3D11_MAP_WRITE_DISCARD, 0, &sub_resource);
String8 data = str8_struct(&cmd_globals);
U8 *ptr = (U8 *)sub_resource.pData;
MemoryCopy(ptr, data.str, data.size);
ID3D11DeviceContext_Unmap(d_ctx, (ID3D11Resource *)cmd_global_buffer, 0);
}
// Setup input assembly
U32 stride = bytes_per_instance;
U32 offset = 0;
ID3D11DeviceContext_IASetPrimitiveTopology(d_ctx, D3D11_PRIMITIVE_TOPOLOGY_TRIANGLESTRIP);
ID3D11DeviceContext_IASetInputLayout(d_ctx, input_layout);
ID3D11DeviceContext_IASetVertexBuffers(d_ctx, 0, 1, &instance_buffer, &stride, &offset);
// Setup shaders
ID3D11DeviceContext_VSSetShader(d_ctx, vs, 0, 0);
ID3D11DeviceContext_VSSetConstantBuffers(d_ctx, 0, 1, &cmd_global_buffer);
ID3D11DeviceContext_PSSetShader(d_ctx, ps, 0, 0);
ID3D11DeviceContext_PSSetConstantBuffers(d_ctx, 0, 1, &cmd_global_buffer);
ID3D11DeviceContext_PSSetShaderResources(d_ctx, 0, 1, &albedo_texture.view);
ID3D11DeviceContext_PSSetSamplers(d_ctx, 0, 1, &sampler);
// Draw
ID3D11DeviceContext_DrawInstanced(d_ctx, /* 4 vertices for a rect */4, instance_count, 0, 0);
}
}
r_function void
R_window_finish(R_Handle window_eqp)
{
R_D3D11_WindowEquip *wnd = R_D3D11_window_equip_from_handle(window_eqp);
HRESULT hr = IDXGISwapChain1_Present(wnd->swapchain, 1, 0);
if(FAILED(hr))
{
break_debugger();
}
ID3D11DeviceContext_ClearState(r_d3d11_state->base_device_context);
}
r_function R_Handle
R_tex2d_font_atlas(Vec2_S64 size, U8 *data)
{
D3D11_USAGE usage = data ? D3D11_USAGE_IMMUTABLE : D3D11_USAGE_DEFAULT;
UINT access_flags = 0;
// TODO(anton): Make switch on Tex2DKind here when we generalise
access_flags = 0;
R_Tex2DFormat fmt = R_Tex2DFormat_R8;
D3D11_TEXTURE2D_DESC tex_desc = {0};
{
tex_desc.Width = size.x;
tex_desc.Height = size.y;
tex_desc.MipLevels = 1;
tex_desc.ArraySize = 1;
tex_desc.Format = R_D3D11_DXGI_format_from_tex2d_format(fmt);
tex_desc.SampleDesc.Count = 1;
tex_desc.SampleDesc.Quality = 0;
tex_desc.Usage = usage;
tex_desc.BindFlags = D3D11_BIND_SHADER_RESOURCE;
tex_desc.CPUAccessFlags = access_flags;
}
D3D11_SUBRESOURCE_DATA initial_data = {0};
{
initial_data.pSysMem = data;
initial_data.SysMemPitch = R_bytes_per_pixel_from_tex2d_format(fmt) * size.x;
initial_data.SysMemSlicePitch = 0;
}
R_D3D11_Tex2D texture = {0};
ID3D11Device_CreateTexture2D(r_d3d11_state->base_device, &tex_desc, &initial_data, &texture.texture);
ID3D11Device_CreateShaderResourceView(r_d3d11_state->base_device, (ID3D11Resource *)texture.texture, 0, &texture.view);
texture.size = vec2_S32_from_vec(size);
texture.format = fmt;
return R_D3D11_handle_from_tex2d(texture);
}
// TODO I kind of dont want this release code but I also dont want the debug output when closing app.
#define __ID3D11_Release(t, n) if(r_d3d11_state->##n) { t##_Release(r_d3d11_state->##n); }
// This is mostly to avoid annoying error message from d3d11 debug layer?
r_function void
R_shutdown()
{
R_D3D11_Tex2D atlas_texture = R_D3D11_tex2d_from_handle(F_get_state()->atlas.texture);
if(atlas_texture.texture) { ID3D11Texture2D_Release(atlas_texture.texture); }
if(atlas_texture.view) { ID3D11ShaderResourceView_Release(atlas_texture.view); }
for(R_D3D11_ShaderPairKind kind = (R_D3D11_ShaderPairKind)(R_D3D11_ShaderPairKind_Nil+1);
kind < R_D3D11_ShaderPairKind_COUNT;
kind = (R_D3D11_ShaderPairKind)(kind + 1))
{
__ID3D11_Release(ID3D11InputLayout, input_layout_table[kind]);
__ID3D11_Release(ID3D11VertexShader, vs_table[kind]);
__ID3D11_Release(ID3D11PixelShader, ps_table[kind]);
}
for(R_D3D11_CmdGlobalKind kind = (R_D3D11_CmdGlobalKind)(R_D3D11_CmdGlobalKind_Nil+1);
kind < R_D3D11_CmdGlobalKind_COUNT;
kind = (R_D3D11_CmdGlobalKind)(kind + 1))
{
__ID3D11_Release(ID3D11Buffer, cmd_global_buffer_table[kind]);
}
__ID3D11_Release(ID3D11Buffer, scratch_buffer_64kb);
__ID3D11_Release(ID3D11Buffer, scratch_buffer_8mb);
__ID3D11_Release(ID3D11SamplerState, nearest_sampler);//ID3D11SamplerState_Release(r_d3d11_state->nearest_sampler);
__ID3D11_Release(ID3D11SamplerState, linear_sampler);//ID3D11SamplerState_Release(r_d3d11_state->linear_sampler);
__ID3D11_Release(ID3D11DepthStencilState, depth_stencil_state);
__ID3D11_Release(ID3D11BlendState, main_blend_state);
__ID3D11_Release(ID3D11RasterizerState, rasterizer_state);//ID3D11RasterizerState_Release(r_d3d11_state->rasterizer_state);
__ID3D11_Release(IDXGIFactory2, dxgi_factory2);
__ID3D11_Release(IDXGIAdapter, dxgi_adapter);
__ID3D11_Release(IDXGIDevice, dxgi_device);
__ID3D11_Release(ID3D11Device, base_device);
__ID3D11_Release(ID3D11DeviceContext, base_device_context);
}

137
src/render/d3d11/render_d3d11.h
View File

@ -1,137 +0,0 @@
#ifndef RENDER_D3D11_H
#define RENDER_D3D11_H
#define COBJMACROS
#include <d3d11.h>
#include <dxgi1_3.h>
#include <d3dcompiler.h>
#include <dxgidebug.h>
#pragma comment(lib, "user32")
#pragma comment(lib, "dxguid")
#pragma comment(lib, "dxgi")
#pragma comment(lib, "d3d11")
#pragma comment(lib, "d3dcompiler")
/////////////////////////////////
//~ Metadata types. Ryan uses metadesk to generate tables, but I hardcode it for now.
// TODO(anton): Use metaprogramming to generate what is necessary here.
typedef struct R_D3D11_CmdGlobalKindInfo R_D3D11_CmdGlobalKindInfo;
struct R_D3D11_CmdGlobalKindInfo
{
U64 size;
};
typedef enum R_D3D11_CmdGlobalKind
{
R_D3D11_CmdGlobalKind_Nil,
R_D3D11_CmdGlobalKind_Rect2D,
R_D3D11_CmdGlobalKind_Grid,
R_D3D11_CmdGlobalKind_COUNT
}
R_D3D11_CmdGlobalKind;
typedef struct R_D3D11_ShaderPairKindInfo R_D3D11_ShaderPairKindInfo;
struct R_D3D11_ShaderPairKindInfo
{
String8 name;
String8 shader_blob; //String8 shader_blob;
D3D11_INPUT_ELEMENT_DESC *element_description;
U64 element_description_count;
};
typedef enum R_D3D11_ShaderPairKind
{
R_D3D11_ShaderPairKind_Nil,
R_D3D11_ShaderPairKind_Rect2D,
R_D3D11_ShaderPairKind_Grid,
R_D3D11_ShaderPairKind_COUNT
}
R_D3D11_ShaderPairKind;
/////////////////////////////////
//~ Pipeline data types
typedef struct R_D3D11_CmdGlobals_Rect2D R_D3D11_CmdGlobals_Rect2D;
struct R_D3D11_CmdGlobals_Rect2D
{
Vec2_F32 viewport_size;
Vec2_F32 albedo_t2d_size;
Vec3_F32 transform[3];
Vec2_F32 _16byte_padding0_;
};
/////////////////////////////////
//~ Resource types
typedef struct R_D3D11_Tex2D R_D3D11_Tex2D;
struct R_D3D11_Tex2D
{
ID3D11Texture2D *texture;
ID3D11ShaderResourceView *view;
Vec2_S32 size;
R_Tex2DFormat format;
R_Tex2DKind kind;
};
typedef struct R_D3D11_Buffer R_D3D11_Buffer;
struct R_D3D11_Buffer
{
ID3D11Buffer *obj;
U64 size;
};
/////////////////////////////////
//~ Main state bundle
typedef struct R_D3D11_State R_D3D11_State;
struct R_D3D11_State
{
Arena *arena;
//- Base d3d11 objects
ID3D11Device *base_device;
ID3D11DeviceContext *base_device_context;
IDXGIDevice *dxgi_device;
IDXGIAdapter *dxgi_adapter;
IDXGIFactory2 *dxgi_factory2;
ID3D11RasterizerState *rasterizer_state;
ID3D11BlendState *main_blend_state;
ID3D11DepthStencilState *depth_stencil_state;
ID3D11SamplerState *nearest_sampler;
ID3D11SamplerState *linear_sampler;
//- Global buffers
// NOTE(anton): We have an extra space for the nil buffer, which is how it will work with nil structs etc.
// That's "wasting" a bit of space, but with huge benefits in terms of codepaths and error handling.
// Nil is a valid state that does nothing.
ID3D11Buffer *cmd_global_buffer_table[R_D3D11_CmdGlobalKind_COUNT];
//- Shader tables
ID3D11InputLayout *input_layout_table[R_D3D11_ShaderPairKind_COUNT];
ID3D11VertexShader *vs_table[R_D3D11_ShaderPairKind_COUNT];
ID3D11PixelShader *ps_table[R_D3D11_ShaderPairKind_COUNT];
// Scratch buffers
ID3D11Buffer *scratch_buffer_64kb;
ID3D11Buffer *scratch_buffer_8mb;
};
typedef struct R_D3D11_WindowEquip R_D3D11_WindowEquip;
struct R_D3D11_WindowEquip
{
IDXGISwapChain1 *swapchain;
ID3D11Texture2D *framebuffer;
ID3D11RenderTargetView *framebuffer_rtv;
Vec2_S64 last_resolution;
};
/////////////////////////////////
//~ D3D11 Functions
r_function R_Handle R_D3D11_handle_from_window_equip(R_D3D11_WindowEquip *equip);
r_function R_D3D11_WindowEquip *R_D3D11_window_equip_from_handle(R_Handle handle);
r_function R_Handle R_D3D11_handle_from_tex2d(R_D3D11_Tex2D texture);
#endif /* RENDER_D3D11_H */

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src/render/d3d11/shaders/rect2d.hlsl
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cbuffer CmdGlobals : register(b0)
{
float2 viewport_size_px;
float2 albedo_t2d_size_px;
row_major float3x3 transform;
}
Texture2D albedo_t2d : register(t0);
SamplerState albedo_t2d_sampler : register(s0);
struct CPU2Vertex
{
float4 dst_rect_px : POS; // Here we have two sets of 2D points, first is the top left corner of the rectnagle, and second is the bottom right corner.
float4 src_rect_px : TEX;
float4 color00 : COL0;
float4 color01 : COL1;
float4 color10 : COL2;
float4 color11 : COL3;
float4 corner_radii_px : CRAD;
float4 style_params : STY; // border_thickness_px, softness_px, omit_texture, unused
uint vertex_id : SV_VertexID;
};
struct Vertex2Pixel
{
float4 position : SV_POSITION;
float2 rect_half_size_px : PSIZE;
float2 texcoord_pct : TEX;
float2 cornercoord_pct : CORC;
float4 color00 : COL0;
float4 color01 : COL1;
float4 color10 : COL2;
float4 color11 : COL3;
float corner_radius_px : CRAD;
float border_thickness_px : BTHC;
float softness_px : SFT;
float omit_texture : OTX;
};
//- Helpers
float rect_SDF(float2 sample_pos, float2 rect_half_size, float radius)
{
return length(max(abs(sample_pos) - rect_half_size + radius, 0.0)) - radius;
}
//~ Vertex shader
Vertex2Pixel
vs_main(CPU2Vertex cpu2vertex)
{
// Here we statically define the vertex as a rectangle over the entire NDC space [-1, 1] for x and y, I think?
// From debugging in RenderDoc I can confirm that -1,-1 is top left corner, and 1,1 bottom right corner.
// Then we can use the input data to scale these points to get proper screen space vertex coordinates for what we want to render.
static float2 vertices[] =
{
{-1, -1},
{-1, +1},
{+1, -1},
{+1, +1},
};
// Unpack input
float2 dst_p0_px = cpu2vertex.dst_rect_px.xy; // top left corner
float2 dst_p1_px = cpu2vertex.dst_rect_px.zw; // bottom right corner
float2 src_p0_px = cpu2vertex.src_rect_px.xy;
float2 src_p1_px = cpu2vertex.src_rect_px.zw;
float2 dst_size_px = abs(dst_p1_px - dst_p0_px);
// unpack style
float border_thickness_px = cpu2vertex.style_params.x;
float softness_px = cpu2vertex.style_params.y;
float omit_texture = cpu2vertex.style_params.z;
// Transform input points to screen destination coordinates
float2 dst_half_size = (dst_p1_px - dst_p0_px) / 2;
float2 dst_center = (dst_p1_px + dst_p0_px) / 2;
// transform the vertex according to the input points
float2 dst_pos = (vertices[cpu2vertex.vertex_id] * dst_half_size + dst_center);
// Swap y-coordinate to have -1,-1 in top left
dst_pos.y = viewport_size_px.y - dst_pos.y;
float2 src_pos[] =
{
float2(src_p0_px.x/albedo_t2d_size_px.x, src_p0_px.y/albedo_t2d_size_px.y),
float2(src_p0_px.x/albedo_t2d_size_px.x, src_p1_px.y/albedo_t2d_size_px.y),
float2(src_p1_px.x/albedo_t2d_size_px.x, src_p0_px.y/albedo_t2d_size_px.y),
float2(src_p1_px.x/albedo_t2d_size_px.x, src_p1_px.y/albedo_t2d_size_px.y),
};
float2 dst_c_verts_pct[] =
{
float2(0, 0),
float2(0, 1),
float2(1, 0),
float2(1, 1),
};
float dst_r_verts_px[] =
{
cpu2vertex.corner_radii_px.x,
cpu2vertex.corner_radii_px.y,
cpu2vertex.corner_radii_px.z,
cpu2vertex.corner_radii_px.w,
};
// Package output
Vertex2Pixel vertex2pixel;
{
vertex2pixel.position.x = 2 * dst_pos.x / viewport_size_px.x - 1.f;
vertex2pixel.position.y = 2 * dst_pos.y / viewport_size_px.y - 1.f;
vertex2pixel.position.z = 0.f;
vertex2pixel.position.w = 1.f;
vertex2pixel.rect_half_size_px = dst_size_px/2.0f;
vertex2pixel.texcoord_pct.x = src_pos[cpu2vertex.vertex_id].x;
vertex2pixel.texcoord_pct.y = src_pos[cpu2vertex.vertex_id].y;
vertex2pixel.cornercoord_pct = dst_c_verts_pct[cpu2vertex.vertex_id];
vertex2pixel.color00 = cpu2vertex.color00;
vertex2pixel.color01 = cpu2vertex.color01;
vertex2pixel.color10 = cpu2vertex.color10;
vertex2pixel.color11 = cpu2vertex.color11;
vertex2pixel.corner_radius_px = dst_r_verts_px[cpu2vertex.vertex_id];
vertex2pixel.border_thickness_px = border_thickness_px;
vertex2pixel.softness_px = softness_px;
vertex2pixel.omit_texture = omit_texture;
}
return vertex2pixel;
}
//~ Pixel shader
float4
ps_main(Vertex2Pixel vertex2pixel) : SV_TARGET
{
float4 top_color = (1 - vertex2pixel.cornercoord_pct.x)*vertex2pixel.color00 + (vertex2pixel.cornercoord_pct.x)*vertex2pixel.color10;
float4 bot_color = (1 - vertex2pixel.cornercoord_pct.x)*vertex2pixel.color01 + (vertex2pixel.cornercoord_pct.x)*vertex2pixel.color11;
float4 tint = (1 - vertex2pixel.cornercoord_pct.y)*top_color + (vertex2pixel.cornercoord_pct.y)*bot_color;
float4 albedo_sample = float4(1, 1, 1, 1);
albedo_sample = albedo_t2d.Sample(albedo_t2d_sampler, vertex2pixel.texcoord_pct) * albedo_sample;
// Corners
float2 sdf_sample_pos = float2(
(2*vertex2pixel.cornercoord_pct.x - 1)*vertex2pixel.rect_half_size_px.x,
(2*vertex2pixel.cornercoord_pct.y - 1)*vertex2pixel.rect_half_size_px.y
);
float2 half_size = vertex2pixel.rect_half_size_px - float2(vertex2pixel.softness_px*2.f, vertex2pixel.softness_px*2.f);
float corner_sdf_s = rect_SDF(sdf_sample_pos, half_size, vertex2pixel.corner_radius_px);
float corner_sdf_t = 1-smoothstep(0, 2*vertex2pixel.softness_px, corner_sdf_s);
// Borders
float border_radius = max(vertex2pixel.corner_radius_px-vertex2pixel.border_thickness_px, 0);
float border_sdf_s = rect_SDF(sdf_sample_pos, half_size - vertex2pixel.border_thickness_px, border_radius);
float border_sdf_t = smoothstep(0, 2*vertex2pixel.softness_px, border_sdf_s);
if(vertex2pixel.border_thickness_px == 0)
{
border_sdf_t = 1;
}
float4 final_color = float4(1, 1, 1, 1);
final_color *= tint;
final_color *= corner_sdf_t;
final_color *= border_sdf_t;
if(vertex2pixel.omit_texture < 1)
{
final_color = float4(1, 1, 1, albedo_sample.r);
}
//float4 final_color = vertex2pixel.color;
return final_color;
}

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src/render/render_core.h
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#ifndef RENDER_CORE_H
#define RENDER_CORE_H
// NOTE(anton):
// The Render layer is an abstraction over whatever rendering backend is chosen.
// Right now I will only support D3D11.
//////////////////////////////////////////
//~ Backend asbtraction
//
r_function R_InitReceipt R_init(OS_InitReceipt os_init, OS_InitGfxReceipt os_gfx_init);
r_function R_Handle R_window_equip(OS_Handle window);
r_function void R_window_unequip(OS_Handle window, R_Handle window_equip);
r_function void R_shutdown();
r_function void R_frame_begin(void);
r_function void R_frame_end(void);
r_function void R_window_start(R_Handle window_equip, Vec2_S64 resolution);
r_function void R_window_submit(R_Handle window_equip, R_PassList *pass_list);
r_function void R_window_finish(R_Handle window_equip);
r_function R_Handle R_tex2d_font_atlas(Vec2_S64 size, U8 *data);
#endif /* RENDER_CORE_H */

11
src/render/render_inc.c
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// Main includes
//
#include "render_types.c"
//#include "render_core.c" // render_core is really whatever backend we have, ie the actual implementations.
// So render_d3d11.c should implement R_init, R_window_equip etc
///////
/// Direct include D3D11 ??
///
#include "d3d11/render_d3d11.c"

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src/render/render_inc.h
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#ifndef RENDER_INC_H
#define RENDER_INC_H
// Backend constants
#define R_BACKEND_D3D11 1
// Pick backend
//
#if !defined(R_BACKEND)
# if OS_WINDOWS
# define R_BACKEND R_BACKEND_D3D11
# else
# error No rendering backend defined for this operating system.
# endif
#endif
////////////////
#include "render_types.h"
#include "render_core.h"
// NOTE(anton): Ryan is doing some thing where he is only directly including d3d11
// if he is doing a C++ build. I think I always want to directly include?
// But why is he doing like this? Because of templating?
// Apparently there is no official C headers for DirectWrite?
#include "d3d11/render_d3d11.h"
#endif /* RENDER_INC_H */

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src/render/render_types.c
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root_function R_Handle
R_handle_zero(void)
{
R_Handle out = {0};
return out;
}
root_function B32
R_handle_match(R_Handle a, R_Handle b)
{
return (a.u64[0] == b.u64[0] &&
a.u64[1] == b.u64[1] &&
a.u64[2] == b.u64[2] &&
a.u64[3] == b.u64[3]);
}
root_function B32
R_handle_is_zero(R_Handle handle)
{
return R_handle_match(handle, R_handle_zero());
}
root_function U64
R_bytes_per_pixel_from_tex2d_format(R_Tex2DFormat fmt)
{
U64 result = 0;
switch(fmt)
{
default:
case R_Tex2DFormat_R8: {result = 1;} break;
case R_Tex2DFormat_RGBA8: {result = 4;} break;
}
return result;
}
root_function R_Pass *
R_pass_list_push(Arena *arena, R_PassList *list, R_PassKind kind)
{
R_PassNode *node = PushArrayZero(arena, R_PassNode, 1);
QueuePush(list->first, list->last, node);
list->count += 1;
R_Pass *pass = &node->v;
pass->kind = kind;
switch(kind)
{
default:{} break;
case R_PassKind_UI: { pass->params_ui = PushArrayZero(arena, R_PassParams_UI, 1); } break;
}
return pass;
}
root_function void *
R_batch_list_push(Arena *arena, R_BatchList *list, U64 cap, U64 instance_size)
{
void *result = 0;
// TODO(anton):
// A batch is a collection of instances. We should make something
// that checks so we can grow batches if possible, or makes a new batch if
// the current batch is full.
// Right now we just have a single batch and we should fit cap number of instances in it.
R_Batch *batch = list->last;
if(batch == 0)
{
batch = PushArrayZero(arena, R_Batch, 1);
// v is just the collection of bytes for this batch.
batch->v = PushArray(arena, U8, instance_size*cap);
batch->instance_cap = cap;
batch->byte_cap = instance_size*cap;
QueuePush(list->first, list->last, batch);
list->batch_count += 1;
}
// Catch full batch
if(batch->instance_count >= cap)
{
break_debugger();
}
// Grab pointer to the memory that holds the new instance.
// This is indexed by the current instance count (previous count)
// and the size in bytes of the instance type.
U64 instance_count = batch->instance_count;
result = &batch->v[instance_count*instance_size];
// Increment count afterwards
batch->instance_count += 1;
batch->byte_count += instance_size;
list->instance_count += 1;
list->byte_count += instance_size;
return result;
}

211
src/render/render_types.h
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#ifndef RENDER_TYPES_H
#define RENDER_TYPES_H
//////////////////////////////
//~
#if LANG_C
# define r_global extern
#else
# define r_global no_name_mangle
#endif
#define r_function no_name_mangle
//////////////////////////////
//~ Basic types
typedef struct R_InitReceipt R_InitReceipt;
struct R_InitReceipt
{
U64 u64[1];
};
//////////////////////////////
//~ Handle types
typedef union R_Handle R_Handle;
union R_Handle
{
U64 u64[4];
U32 u32[8];
};
//////////////////////////////
//~ Blending types
typedef enum R_BlendMode
{
R_BlendMode_Normal,
R_BlendMode_Additive,
R_BlendMode_COUNT
}
R_BlendMode;
//////////////////////////////
//~ Texture types
typedef enum R_Tex2DFormat
{
R_Tex2DFormat_Null,
R_Tex2DFormat_R8,
R_Tex2DFormat_RGBA8,
R_Tex2DFormat_COUNT
}
R_Tex2DFormat;
typedef enum R_Tex2DSampleKind
{
R_Tex2DSampleKind_Nearest,
R_Tex2DSampleKind_Linear,
R_Tex2DSampleKind_COUNT
}
R_Tex2DSampleKind;
typedef enum R_Tex2DKind
{
R_Tex2DKind_Static,
R_Tex2DKind_Dynamic,
}
R_Tex2DKind;
typedef struct R_Slice2F32 R_Slice2F32;
struct R_Slice2F32
{
R_Handle texture;
Rng2_F32 region;
};
//////////////////////////////
//~ Instance types
// These are the structures that pass information about render primitives down to the
// render backend.
typedef struct R_Rect2DInst R_Rect2DInst;
struct R_Rect2DInst
{
Rng2_F32 dst_rect;
Rng2_F32 src_rect;
Vec4_F32 colors[Corner_COUNT];
F32 corner_radii[Corner_COUNT];
F32 border_thickness;
F32 softness;
F32 omit_texture;
F32 _unused_[1];
};
//////////////////////////////
//~ Batch type
typedef struct R_Batch R_Batch;
struct R_Batch
{
R_Batch *next;
U8 *v;
U64 byte_count;
U64 byte_cap;
U64 instance_count;
U64 instance_cap;
};
typedef struct R_BatchList R_BatchList;
struct R_BatchList
{
R_Batch *first;
R_Batch *last;
U64 batch_count;
U64 instance_count;
U64 byte_count;
};
typedef struct R_BatchGroup2DParams R_BatchGroup2DParams;
struct R_BatchGroup2DParams
{
R_Handle albedo_tex; // Color texture to go with this batch of 2D renders
R_Tex2DSampleKind albedo_tex_sample_kind;
Mat3x3_F32 xform2d;
Rng2_F32 clip;
};
typedef struct R_BatchGroup2DNode R_BatchGroup2DNode;
struct R_BatchGroup2DNode
{
R_BatchGroup2DNode *next;
R_BatchList batches;
R_BatchGroup2DParams params;
};
typedef struct R_BatchGroup2DList R_BatchGroup2DList;
struct R_BatchGroup2DList
{
R_BatchGroup2DNode *first;
R_BatchGroup2DNode *last;
U64 count;
};
//////////////////////////////
//~ Pass types
typedef enum R_PassKind
{
R_PassKind_Null,
R_PassKind_UI,
R_PassKind_COUNT
}
R_PassKind;
typedef struct R_PassParams_UI R_PassParams_UI;
struct R_PassParams_UI
{
Rng2_F32 viewport;
R_BatchGroup2DList rects;
};
typedef struct R_Pass R_Pass;
struct R_Pass
{
R_PassKind kind;
union
{
void *params;
R_PassParams_UI *params_ui;
};
};
typedef struct R_PassNode R_PassNode;
struct R_PassNode
{
R_PassNode *next;
R_Pass v;
};
typedef struct R_PassList R_PassList;
struct R_PassList
{
R_PassNode *first;
R_PassNode *last;
U64 count;
};
//////////////////////////////
//~ Handle type functions
root_function R_Handle R_handle_zero(void);
root_function B32 R_handle_match(R_Handle a, R_Handle b);
root_function B32 R_handle_is_zero(R_Handle handle);
//////////////////////////////
//~ Texture type functions
root_function U64 R_bytes_per_pixel_from_tex2d_format(R_Tex2DFormat fmt);
//////////////////////////////
//~ Pass building helper functions
root_function R_Pass *R_pass_list_push(Arena *arena, R_PassList *list, R_PassKind kind);
root_function void *R_batch_list_push(Arena *arena, R_BatchList *list, U64 cap, U64 instance_size);
#define R_batch_list_push_struct(arena, list, cap, type) (type *)R_batch_list_push((arena), (list), (cap), sizeof(type))
//////////////////////////////
//~ Other??
#endif /* RENDER_TYPES_H */

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src/ui/ui_basic_widgets.c
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// We create a box with no flags of size size, and push it to
// the hierarchy.
root_function void
UI_spacer(UI_Size size)
{
UI_Box *parent = UI_top_parent();
Axis2 parent_axis = parent->child_layout_axis;
UI_set_next_pref_size(parent_axis, size);
UI_set_next_pref_size(Axis2_flip(parent_axis), UI_pixels(0, 0));
UI_Box *box = UI_box_make(0, str8_lit(""));
unused_variable(box);
}
root_function UI_Signal
UI_button(String8 string)
{
UI_Box *box = UI_box_make(UI_BoxFlag_DrawBorder |
UI_BoxFlag_DrawBackground |
UI_BoxFlag_DrawText |
UI_BoxFlag_DrawHotEffects |
UI_BoxFlag_DrawActiveEffects |
//UI_BoxFlag_DrawDropShadow |
UI_BoxFlag_Clickable,
string);
UI_Signal result = UI_signal_from_box(box);
return result;
}
root_function void
UI_named_column_begin(String8 name)
{
UI_set_next_child_layout_axis(Axis2_Y);
UI_Box *box = UI_box_make(0, name);
UI_push_parent(box);
}
root_function void
UI_column_begin(void)
{
UI_named_column_begin(str8_lit(""));
}
root_function void
UI_column_end(void)
{
UI_pop_parent();
}
root_function void
UI_named_row_begin(String8 name)
{
UI_set_next_child_layout_axis(Axis2_X);
UI_Box *box = UI_box_make(0, name);
UI_push_parent(box);
}
root_function void
UI_row_begin(void)
{
UI_named_row_begin(str8_lit(""));
}
root_function void
UI_row_end(void)
{
UI_pop_parent();
}
root_function UI_Box *
UI_pane_begin(Rng2_F32 rect, String8 string)
{
UI_push_rect(rect);
UI_set_next_child_layout_axis(Axis2_Y);
UI_Box *box = UI_box_make(UI_BoxFlag_Clickable|UI_BoxFlag_Clip|UI_BoxFlag_DrawBorder|UI_BoxFlag_DrawBackground,
string);
UI_pop_rect();
UI_push_parent(box);
UI_push_pref_width(UI_pct(1, 0));
return box;
}
root_function void
UI_pane_end(void)
{
UI_pop_pref_width();
UI_pop_parent();
}

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src/ui/ui_basic_widgets.h
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/* date = April 2nd 2024 2:13 pm */
#ifndef UI_BASIC_WIDGETS_H
#define UI_BASIC_WIDGETS_H
root_function void UI_spacer(UI_Size size);
root_function UI_Signal UI_button(String8 string);
root_function void UI_named_column_begin(String8 name);
root_function void UI_column_begin(void);
root_function void UI_column_end(void);
root_function void UI_named_row_begin(String8 name);
root_function void UI_row_begin(void);
root_function void UI_row_end();
#define UI_padding(size) DeferLoop(UI_spacer(size), UI_spacer(size))
#define UI_column DeferLoop(UI_column_begin(), UI_column_end())
#define UI_row DeferLoop(UI_row_begin(), UI_row_end())
#endif //UI_BASIC_WIDGETS_H

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src/ui/ui_colors.h
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/* date = April 10th 2024 8:19 pm */
#ifndef UI_COLORS_H
#define UI_COLORS_H
#endif //UI_COLORS_H

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src/ui/ui_core.c
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per_thread UI_State* ui_state;
global F32 ui_g_dt;
////////////////////////////////
//~ "Generated"/meta functions
#include "ui_meta.c"
////////////////////////////////
//~ Basic type functions
//- Boxes
root_function B32
UI_box_is_nil(UI_Box *box)
{
return box == 0 || box == &ui_g_nil_box;
}
root_function UI_BoxRec
UI_box_recurse_depth_first(UI_Box *box, UI_Box *stopper, MemberOffset sib, MemberOffset child)
{
UI_BoxRec rec = {0};
rec.next = &ui_g_nil_box;
// We check what we get from the child offset.
// If it is not nil we set the next pointer to that box.
if(!UI_box_is_nil(MemberFromOff(box, UI_Box *, child)))
{
rec.next = MemberFromOff(box, UI_Box *, child);
rec.push_count = 1;
}
else
{
// If the child is nil, we loop over all boxes going up the parent chain,
// until we hit stopper.
// As soon as we hit a sibling that is non-nil, we put that in next and return.
for(UI_Box *b = box; !UI_box_is_nil(b) && b != stopper; b = b->parent)
{
if(!UI_box_is_nil(MemberFromOff(b, UI_Box *, sib)))
{
rec.next = MemberFromOff(b, UI_Box *, sib);
break;
}
rec.pop_count += 1;
}
}
return rec;
}
//- sizes
root_function UI_Size
UI_size_make(UI_SizeKind kind, F32 value, F32 strictness)
{
UI_Size result = {0};
result.kind = kind;
result.value = value;
result.strictness = strictness;
return result;
}
//- ID strings
root_function String8
UI_hash_part_from_box_string(String8 string)
{
// TODO(anton): Implement ryans stuff here with substrings
return string;
}
//- Keys
root_function UI_Key
UI_key_zero(void)
{
UI_Key key = {0};
return key;
}
root_function UI_Key
UI_key_from_string(UI_Key seed, String8 string)
{
UI_Key key = {0};
if(string.size > 0)
{
MemoryCopyStruct(&key, &seed);
for(U64 i = 0; i < string.size; i += 1)
{
key.u64[0] = ((key.u64[0] << 5) + key.u64[0]) + string.str[i];
}
}
return key;
}
root_function B32
UI_key_match(UI_Key a, UI_Key b)
{
return a.u64[0] == b.u64[0];
}
root_function UI_Signal UI_signal_from_box(UI_Box *box)
{
UI_Signal sig = {box};
// TODO(anton): possibly clipped box rect
Rng2_F32 rect = box->rect;
B32 ctx_menu_is_ancestor = 0;
{
for(UI_Box *parent = box; !UI_box_is_nil(parent); parent = parent->parent)
{
if(parent == ui_state->ctx_menu_root)
{
ctx_menu_is_ancestor = 1;
break;
}
}
}
for(OS_Event *event = ui_state->events->first, *next = 0; event !=0; event = next)
{
B32 taken = 0; // flag for consume
next = event->next;
//- unpack event
Vec2_F32 event_mouse = event->position;
B32 event_mouse_in_bounds = rng2_contains_vec2_F32(rect, event_mouse);
UI_MouseButtonKind event_mouse_button_kind = (event->key == OS_Key_MouseLeft ? UI_MouseButtonKind_Left :
event->key == OS_Key_MouseRight ? UI_MouseButtonKind_Right :
event->key == OS_Key_MouseMiddle ? UI_MouseButtonKind_Middle :
UI_MouseButtonKind_Left);
B32 event_key_is_mouse = (event->key == OS_Key_MouseLeft ||
event->key == OS_Key_MouseRight ||
event->key == OS_Key_MouseMiddle);
//- Mouse presses
if(box->flags & UI_BoxFlag_MouseClickable &&
event->kind == OS_EventKind_Press &&
event_mouse_in_bounds &&
event_key_is_mouse)
{
ui_state->hot_box_key = box->key;
ui_state->active_box_key[event_mouse_button_kind] = box->key;
sig.flag |= (UI_SignalFlag_LeftPressed<<event_mouse_button_kind);
taken = 1;
}
if(taken)
{
OS_consume_event(ui_state->events, event);
}
}
//////////////////////////////
//- mouse is over this box's rect -> always mark mouse-over
// But the rect may be non-visible
Vec2_F32 mouse_pos = ui_state->mouse;
B32 rect_contains_mouse = rng2_contains_vec2_F32(rect, mouse_pos);
if(rect_contains_mouse)
{
sig.flag |= UI_SignalFlag_MouseOver;
}
//////////////////////////////
//- mouse is over this box's rect, no other hot key? -> set hot key, mark hovering
//
if(box->flags & UI_BoxFlag_MouseClickable &&
rect_contains_mouse) // &&
//(UI_key_match(ui_state->hot_box_key, UI_key_zero()) || UI_key_match(ui_state->hot_box_key, box->key)) //&&
//(UI_key_match(ui_state->active_box_key[UI_MouseButtonKind_Left], UI_key_zero()) || UI_key_match(ui_state->active_box_key[UI_MouseButtonKind_Left], box->key)) &&
//(UI_key_match(ui_state->active_box_key[UI_MouseButtonKind_Middle], UI_key_zero()) || UI_key_match(ui_state->active_box_key[UI_MouseButtonKind_Middle], box->key)) &&
//(UI_key_match(ui_state->active_box_key[UI_MouseButtonKind_Right], UI_key_zero()) || UI_key_match(ui_state->active_box_key[UI_MouseButtonKind_Right], box->key)))
{
ui_state->hot_box_key = box->key;
sig.flag |= UI_SignalFlag_Hovering;
}
//////////////////////////////
//- rjf: clicking on something outside the context menu kills the context menu
//
if(!ctx_menu_is_ancestor && sig.flag & (UI_SignalFlag_LeftPressed|UI_SignalFlag_RightPressed|UI_SignalFlag_MiddlePressed))
{
UI_ctx_menu_close();
}
return sig;
}
////////////////////////////////
//~ UI State functions
root_function UI_State*
UI_state_alloc(void)
{
ui_g_nil_box.hash_next = &ui_g_nil_box;
ui_g_nil_box.hash_prev = &ui_g_nil_box;
ui_g_nil_box.first = &ui_g_nil_box;
ui_g_nil_box.last = &ui_g_nil_box;
ui_g_nil_box.next = &ui_g_nil_box;
ui_g_nil_box.prev = &ui_g_nil_box;
ui_g_nil_box.parent = &ui_g_nil_box;
Arena* arena = m_make_arena_reserve(Gigabytes(1));
UI_State *state = PushArrayZero(arena, UI_State, 1);
state->arena = arena;
state->box_table_size = 4096;
state->box_table = PushArrayZero(arena, UI_BoxSlot, state->box_table_size);
// TODO(anton): make some better system for setting and getting theme colors
state->colors[UI_Color_Null] = vec4_F32(0, 0, 0, 1);
state->colors[UI_Color_PlainBackground] = vec4_F32(0.3f, 0.2f, 0.2f, 1);
state->colors[UI_Color_PlainBorder] = vec4_F32(0.4f, 0.4f, 0.4f, 1);
state->colors[UI_Color_PlainText] = vec4_F32(0.85f, 0.85f, 0.85f, 1);
state->colors[UI_Color_PlainOverlay] = vec4_F32(0.9f, 0.6f, 0.3f, 1);
for(U64 index = 0; index < ArrayCount(state->frame_arenas); index += 1)
{
state->frame_arenas[index] = m_make_arena_reserve(Gigabytes(1));
}
state->last_frame_arena_index = 1;
state->current_frame_arena_index = 0;
// TODO(anton): drag data arena
UI_init_stack_nils(state);
return state;
}
root_function void
UI_state_set(UI_State *ui)
{
ui_state = ui;
}
////////////////////////////////
//~ Build phase
root_function void
UI_build_begin(OS_Handle window, OS_EventList *events)
{
//- Reset per frame state
{
UI_init_stacks(ui_state);
ui_state->build_gen += 1;
m_arena_clear(UI_frame_arena());
ui_state->root = &ui_g_nil_box;
ui_state->ctx_menu_touched_this_frame = 0;
ui_state->ctx_menu_changed = 0;
}
//- Fill per build parameters
{
ui_state->events = events;
ui_state->window = window;
ui_state->mouse = OS_mouse_from_window(window);// TODO(anton): window focused and last time moved stuff.
}
//- "Prune stale boxes"
for(U64 slot = 0; slot < ui_state->box_table_size; slot += 1)
{
for(UI_Box *box = ui_state->box_table[slot].first, *next = 0;
!UI_box_is_nil(box);
box = next)
{
// Set the next box
next = box->hash_next;
// Any boxes existing in the hash table, that has a zero key or has a last_gen_touched+1 that is less
// than the current build gen, are removed from the table. The resulting free slots in the table are pushed
// onto the free list.
if(UI_key_match(box->key, UI_key_zero()) || box->last_gen_touched+1 < ui_state->build_gen)
{
DLLRemove_NPZ(ui_state->box_table[slot].first, ui_state->box_table[slot].last,
box, hash_next, hash_prev,
UI_box_is_nil, UI_box_set_nil);
StackPush(ui_state->first_free_box, box);
ui_state->free_box_list_count += 1;
}
}
}
//- Build root
// This is a UI box that extends the whole of the window.
{
Rng2_F32 client_rect = OS_client_rect_from_window(window);
Vec2_F32 client_rect_size = dim2_F32(client_rect);
UI_set_next_pref_width(UI_pixels(client_rect_size.x, 1));
UI_set_next_pref_height(UI_pixels(client_rect_size.y, 1));
UI_set_next_child_layout_axis(Axis2_Y);
String8 root_name = str8_lit("root_box");
UI_Box *root = UI_box_make(0 /* zero box flags for root box */, root_name);
UI_push_parent(root);
ui_state->root = root;
}
//- Context menu setup
ui_state->ctx_menu_open = ui_state->next_ctx_menu_open;
ui_state->ctx_menu_anchor_key = ui_state->next_ctx_menu_anchor_key;
{
UI_Box *anchor_box = UI_box_from_key(ui_state->ctx_menu_anchor_key);
if(!UI_box_is_nil(anchor_box))
{
ui_state->ctx_menu_anchor_box_last_pos = anchor_box->rect.p0;
}
Vec2_F32 anchor = add2_F32(ui_state->ctx_menu_anchor_box_last_pos, ui_state->ctx_menu_anchor_offset);
UI_fixed_x(anchor.x) UI_fixed_y(anchor.y)
UI_pref_width(UI_size_by_children(0, 1)) UI_pref_height(UI_size_by_children(0, 1))
{
UI_set_next_child_layout_axis(Axis2_Y);
ui_state->ctx_menu_root = UI_box_make(UI_BoxFlag_FloatingX|UI_BoxFlag_FloatingY, str8_lit("ctx_menu"));
}
}
// Reset hot if we don't have an active widget
B32 has_active = 0;
for(EachEnumVal(UI_MouseButtonKind, k))
{
if(!UI_key_match(ui_state->active_box_key[k], UI_key_zero()))
{
has_active = 1;
}
}
if(!has_active)
{
ui_state->hot_box_key = UI_key_zero();
}
//- rjf: reset active keys if they have been pruned
for(EachEnumVal(UI_MouseButtonKind, k))
{
UI_Box *box = UI_box_from_key(ui_state->active_box_key[k]);
if(UI_box_is_nil(box))
{
ui_state->active_box_key[k] = UI_key_zero();
}
}
}
root_function void
UI_build_end(void)
{
ui_state->ctx_menu_touched_this_frame = 1;
if(ui_state->ctx_menu_open != 0 || ui_state->ctx_menu_touched_this_frame == 0)
{
//UI_ctx_menu_close();
}
UI_layout();
// TODO(anton): When I need this and understand why
//if(ui_state->ctx_menu_touched_this_frame && !ui_state->ctx_menu_changed)
//{
//UI_Box *anchor_box = UI_box_from_key(ui_state->ctx_menu_anchor_key);
//if(!UI_box_is_nil(anchor_box))
//{
//Rng2_F32 root_rect = ui_state->ctx_menu_root->rect;
//Vec2_F32 pos =
//{
//anchor_box->rect.x0 + ui_state->ctx_menu_anchor_offset.x,
//anchor_box->rect.y0 + ui_state->ctx_menu_anchor_offset.y,
//};
//Vec2_F32 shift = sub2_F32(pos, root_rect.p0);
//Rng2_F32 new_root_rect = shift2_F32(root_rect, shift);
//ui_state->ctx_menu_root->fixed_position = new_root_rect.p0;
//ui_state->ctx_menu_root->fixed_size = dim2_F32(new_root_rect);
//ui_state->ctx_menu_root->rect = new_root_rect;
//}
//}
//
}
////////////////////////////////
//~ Context menu
root_function void
UI_ctx_menu_open(UI_Key key, UI_Key anchor_key, Vec2_F32 anchor_offset)
{
anchor_offset.x = (F32)(int)anchor_offset.x;
anchor_offset.y = (F32)(int)anchor_offset.y;
ui_state->next_ctx_menu_open = 1;
ui_state->ctx_menu_changed = 1;
// TODO(anton): time parameter for ctx menu animation
ui_state->ctx_menu_key = key;
ui_state->next_ctx_menu_anchor_key = anchor_key;
ui_state->ctx_menu_anchor_offset = anchor_offset;
ui_state->ctx_menu_touched_this_frame = 1;
ui_state->ctx_menu_anchor_box_last_pos = vec2_F32(100, 100);
}
root_function void
UI_ctx_menu_close(void)
{
ui_state->next_ctx_menu_open = 0;
}
root_function B32
UI_begin_ctx_menu(UI_Key key)
{
UI_push_parent(ui_state->root);
UI_push_parent(ui_state->ctx_menu_root);
B32 result = UI_key_match(key, ui_state->ctx_menu_key) && ui_state->ctx_menu_open;
if(result)
{
ui_state->ctx_menu_touched_this_frame = 1;
ui_state->ctx_menu_root->flags |= UI_BoxFlag_DrawBackground;
ui_state->ctx_menu_root->flags |= UI_BoxFlag_DrawDropShadow;
UI_push_pref_width(UI_pixels(100, 0));
UI_push_pref_height(UI_pixels(200, 0));
}
return result;
}
root_function B32
UI_ctx_menu_is_open(UI_Key key)
{
return ui_state->ctx_menu_open && UI_key_match(key, ui_state->ctx_menu_key);
}
root_function void
UI_end_ctx_menu(void)
{
//UI_Box* top_parent = UI_top_parent();
UI_pop_pref_width();
UI_pop_pref_height();
UI_pop_parent();
//top_parent = UI_top_parent();
UI_pop_parent();
//top_parent = UI_top_parent();
}
////////////////////////////////
//~ UI Frame
root_function Arena *
UI_frame_arena(void)
{
return ui_state->frame_arenas[ui_state->current_frame_arena_index];
}
root_function void
UI_frame_begin(F32 delta_time)
{
ui_g_dt = delta_time;
}
root_function void
UI_frame_end(void)
{
U32 last = ui_state->last_frame_arena_index;
ui_state->last_frame_arena_index = ui_state->current_frame_arena_index;
ui_state->current_frame_arena_index = last;
}
////////////////////////////////
//~ Box hierarchy construction
root_function UI_Box *
UI_box_from_key(UI_Key key)
{
UI_Box *result = &ui_g_nil_box;
// The box table contains all the hashed boxes, so we mod by the size to get the slot in the table.
U64 slot = key.u64[0] % ui_state->box_table_size;
if(!UI_key_match(key, UI_key_zero()))
{
// We check if we have a box corresponding to the key in the hash table, and return that if we find it.
for(UI_Box *b = ui_state->box_table[slot].first; !UI_box_is_nil(b); b = b->hash_next)
{
if(UI_key_match(b->key, key))
{
result = b;
break;
}
}
}
return result;
}
root_function UI_Box *
UI_box_make_from_key(UI_BoxFlags flags, UI_Key key)
{
// Get the nil box or a box from the hash table.
UI_Box *box = UI_box_from_key(key);
// If the key has already been used, we "trample" over the key/box pair to make an id-less box.
if(box->last_gen_touched == ui_state->build_gen)
{
box = &ui_g_nil_box;
key = UI_key_zero();
}
// Allocate the box if it's not allocated, or if it's a duplicate key
B32 first_frame = 0;
if(UI_box_is_nil(box))
{
U64 slot = key.u64[0] % ui_state->box_table_size;
first_frame = 1;
box = ui_state->first_free_box;
// If the first free box is nil we push a new box on the arena.
if(UI_box_is_nil(box))
{
box = PushArrayZero(ui_state->arena, UI_Box, 1);
}
else
{
// If the first free box is non-nil, we pop it from the stack.
// This macro works since the first_free_box is a UI_Box type, which has a next member.
// So this will but the ui_state->first_free_box pointer to the next member of the previous
// element pointed to by ui_state->first_free_box.
StackPop(ui_state->first_free_box);
MemoryZeroStruct(box);
ui_state->free_box_list_count -= 1;
}
// We push back the box to the doubly linked list in the table slot, using custom functions for
// zero check and zero set.
DLLPushBack_NPZ(ui_state->box_table[slot].first,
ui_state->box_table[slot].last, box, hash_next, hash_prev,
UI_box_is_nil, UI_box_set_nil);
box->key = key;
}
//- Link to the tree by getting the parent. If the parent is nil, the current box should actually be the root.
UI_Box *parent = UI_top_parent();
if(UI_box_is_nil(parent))
{
ui_state->root = box;
}
else
{
DLLPushBack_NPZ(parent->first, parent->last, box, next, prev, UI_box_is_nil, UI_box_set_nil);
parent->child_count += 1;
box->parent = parent;
}
//- Fill the state of the current box
if(!UI_box_is_nil(box))
{
if(first_frame)
{
box->first_gen_touched = ui_state->build_gen;
}
box->child_count = 0;
box->first = box->last = &ui_g_nil_box;
box->flags = flags | UI_top_flags();
if(ui_state->fixed_width_stack.top != &ui_state->fixed_width_nil_stack_top)
{
box->flags |= UI_BoxFlag_FixedWidth;
box->fixed_size.x = ui_state->fixed_width_stack.top->v;
} else {
box->pref_size[Axis2_X] = UI_top_pref_width();
}
if(ui_state->fixed_height_stack.top != &ui_state->fixed_height_nil_stack_top)
{
box->flags |= UI_BoxFlag_FixedHeight;
box->fixed_size.y = ui_state->fixed_height_stack.top->v;
} else {
box->pref_size[Axis2_Y] = UI_top_pref_height();
}
box->calc_rel_pos.x = UI_top_fixed_x();
box->calc_rel_pos.y = UI_top_fixed_y();
box->child_layout_axis = UI_top_child_layout_axis();
box->last_gen_touched = ui_state->build_gen;
// TODO(anton): Text and color drawing properties here
box->background_color = ui_state->colors[UI_Color_PlainBackground];
box->text_color = ui_state->colors[UI_Color_PlainText];
box->border_color = ui_state->colors[UI_Color_PlainBorder];
box->overlay_color = ui_state->colors[UI_Color_PlainOverlay];
}
UI_auto_pop_stacks(ui_state);
return box;
}
root_function UI_Box *
UI_box_make(UI_BoxFlags flags, String8 string)
{
UI_Key seed = UI_top_seed_key();
String8 string_hash_part = UI_hash_part_from_box_string(string);
UI_Key key = UI_key_from_string(seed, string_hash_part);
UI_Box *box = UI_box_make_from_key(flags, key);
box->string = str8_copy(UI_frame_arena(), string);
return box;
}
////////////////////////////////
//~ layout
root_function void
UI_solve_independent_sizes(UI_Box *root, Axis2 axis)
{
switch(root->pref_size[axis].kind)
{
default:break;
case UI_SizeKind_Pixels:
{
root->calc_size.v[axis] = root->pref_size[axis].value;
root->calc_size.v[axis] = floor_F32(root->calc_size.v[axis]);
} break;
}
// Recurse
for(UI_Box *child = root->first; !UI_box_is_nil(child); child = child->next)
{
UI_solve_independent_sizes(child, axis);
}
}
root_function void
UI_solve_upward_dependent_sizes(UI_Box *root, Axis2 axis)
{
switch(root->pref_size[axis].kind)
{
default:break;
case UI_SizeKind_Percent:
{
UI_Box *ancestor = &ui_g_nil_box;
// Move up the parents and get the first ancestor that does not have
// size by children.
for(UI_Box *p = root->parent; !UI_box_is_nil(p); p = p->parent)
{
if(p->pref_size[axis].kind != UI_SizeKind_SizeByChildren)
{
ancestor = p;
break;
}
}
// The calculated size of the argument box to this function is then
// the ancestor calculated size, scaled by the preferred size of this box, which is
// assumed to be given as a percentage by the SizeKind
if(!UI_box_is_nil(ancestor))
{
root->calc_size.v[axis] = ancestor->calc_size.v[axis] * root->pref_size[axis].value;
root->calc_size.v[axis] = floor_F32(root->calc_size.v[axis]);
}
} break;
}
for(UI_Box *child = root->first; !UI_box_is_nil(child); child = child->next)
{
UI_solve_upward_dependent_sizes(child, axis);
}
}
root_function void
UI_solve_downward_dependent_sizes(UI_Box *root, Axis2 axis)
{
// Here we first recurse since we will depend on the result for this input.
for(UI_Box *child = root->first; !UI_box_is_nil(child); child = child->next)
{
UI_solve_downward_dependent_sizes(child, axis);
}
switch(root->pref_size[axis].kind)
{
default:break;
case UI_SizeKind_SizeByChildren:
{
F32 value = 0;
{
// We will calculate the size to be the sum of the child sizes on this axis,
// if we are on the layout axis.
// If we are not on the layout axis the size will just be the maximum size of any child on that axis.
if(axis == root->child_layout_axis)
{
for(UI_Box *child = root->first; !UI_box_is_nil(child); child = child->next)
{
value += child->calc_size.v[axis];
}
}
else
{
for(UI_Box *child = root->first; !UI_box_is_nil(child); child = child->next)
{
value = Max(value, child->calc_size.v[axis]);
}
}
}
root->calc_size.v[axis] = value;
root->calc_size.v[axis] = floor_F32(root->calc_size.v[axis]);
} break;
}
}
root_function void
UI_solve_size_violations(UI_Box *root, Axis2 axis)
{
// Determine maximum available space from the root size.
F32 available_space = root->calc_size.v[axis];
F32 taken_space = 0.0f;
F32 total_fix_budget = 0.0f;
B32 is_overflow_x_on_axis = (root->flags & (UI_BoxFlag_OverflowX<<axis));
if(!is_overflow_x_on_axis)
{
for(UI_Box *child = root->first; !UI_box_is_nil(child); child = child->next)
{
if(!(child->flags & (UI_BoxFlag_FloatingX<<axis)))
{
if(axis == root->child_layout_axis)
{
taken_space += child->calc_size.v[axis];
}
else
{
taken_space = Max(taken_space, child->calc_size.v[axis]);
}
F32 fix_budget_this_child = child->calc_size.v[axis] * (1.0f - child->pref_size[axis].strictness);
total_fix_budget += fix_budget_this_child;
}
}
}
//- Fix children as much as possible within the calculated budget
if(!is_overflow_x_on_axis)
{
F32 violation = taken_space - available_space;
if(violation > 0 && total_fix_budget > 0)
{
for(UI_Box *child = root->first; !UI_box_is_nil(child); child = child->next)
{
if(!(child->flags & (UI_BoxFlag_FloatingX<<axis)))
{
F32 fix_budget_this_child = child->calc_size.v[axis] * (1.0f - child->pref_size[axis].strictness);
F32 fix_size_this_child = 0.0f;
if(axis == root->child_layout_axis)
{
fix_size_this_child = fix_budget_this_child * (violation / total_fix_budget);
}
else
{
fix_size_this_child = child->calc_size.v[axis] - available_space;
}
fix_size_this_child = Clamp(0, fix_size_this_child, fix_budget_this_child);
child->calc_size.v[axis] -= fix_size_this_child;
child->calc_size.v[axis] = floor_F32(child->calc_size.v[axis]);
}
}
}
}
//- Position all children after fixup
{
if(axis == root->child_layout_axis)
{
// Determine the relative offset by incrementing p by the size of a child on the relevant axis.
F32 p = 0.0f;
for(UI_Box *child = root->first; !UI_box_is_nil(child); child = child->next)
{
if(!(child->flags & (UI_BoxFlag_FloatingX<<axis)))
{
child->calc_rel_pos.v[axis] = p;
p += child->calc_size.v[axis];
}
}
}
else
{
// If we're not on the layout axis the relative position is just zero
for(UI_Box *child = root->first; !UI_box_is_nil(child); child = child->next)
{
if(!(child->flags & (UI_BoxFlag_FloatingX<<axis)))
{
child->calc_rel_pos.v[axis] = 0;
}
}
}
// Set the actual position values and rectangles
for(UI_Box *child = root->first; !UI_box_is_nil(child); child = child->next)
{
Rng2_F32 last_rel_rect = child->rel_rect;
unused_variable(last_rel_rect);
// The relative rectangle starts at the relative position, and ends at the relative rectangle p0 + size.
// TODO(anton): What does the relative rectangle mean?
child->rel_rect.p0.v[axis] = child->calc_rel_pos.v[axis];
child->rel_rect.p1.v[axis] = child->rel_rect.p0.v[axis] + child->calc_size.v[axis];
// TODO(anton): Corner stuff here
// The actual rectangle is the root rect p0, plus th relative p0, minus view offset of the root.
// And the p1 is the p0 + the size of the child.
child->rect.p0.v[axis] = root->rect.p0.v[axis] + child->rel_rect.p0.v[axis] - root->view_offset.v[axis];
child->rect.p1.v[axis] = child->rect.p0.v[axis] + child->calc_size.v[axis];
if(!(child->flags & (UI_BoxFlag_FloatingX<<axis)))
{
// If we are not floating on this axis, we floor the rectangle? Because we want to align to pixel sizes?
child->rect.p0.v[axis] = floor_F32(child->rect.p0.v[axis]);
child->rect.p1.v[axis] = floor_F32(child->rect.p1.v[axis]);
}
}
}
// Recurse
for(UI_Box *child = root->first; !UI_box_is_nil(child); child = child->next)
{
UI_solve_size_violations(child, axis);
}
}
root_function void
UI_layout_root(UI_Box *root, Axis2 axis)
{
UI_solve_independent_sizes(root, axis);
UI_solve_upward_dependent_sizes(root, axis);
UI_solve_downward_dependent_sizes(root, axis);
UI_solve_size_violations(root, axis);
}
root_function void UI_layout(void)
{
for(Axis2 axis = (Axis2)0; axis < Axis2_COUNT; axis = (Axis2)(axis+1))
{
UI_layout_root(ui_state->root, axis);
}
}
////////////////////////////////
//~ Compositions
root_function void
UI_push_pref_size(Axis2 axis, UI_Size v)
{
if(axis == Axis2_X)
{
UI_push_pref_width(v);
}
else
{
UI_push_pref_height(v);
}
}
root_function void UI_pop_pref_size(Axis2 axis)
{
if(axis == Axis2_X)
{
UI_pop_pref_width();
}
else
{
UI_pop_pref_height();
}
}
root_function void
UI_set_next_pref_size(Axis2 axis, UI_Size v)
{
if(axis == Axis2_X)
{
UI_set_next_pref_width(v);
}
else
{
UI_set_next_pref_height(v);
}
}
root_function void
UI_push_fixed_pos(Vec2_F32 v)
{
UI_push_fixed_x(v.x);
UI_push_fixed_y(v.y);
}
root_function void
UI_pop_fixed_pos()
{
UI_pop_fixed_x();
UI_pop_fixed_y();
}
root_function void
UI_set_next_fixed_pos(Vec2_F32 v)
{
UI_set_next_fixed_x(v.x);
UI_set_next_fixed_y(v.y);
}
root_function void
UI_push_fixed_rect(Rng2_F32 rect)
{
Vec2_F32 dim = dim2_F32(rect);
UI_push_fixed_pos(rect.p0);
UI_push_pref_size(Axis2_X, UI_pixels(dim.x, 1));
UI_push_pref_size(Axis2_Y, UI_pixels(dim.y, 1));
}
root_function void
UI_pop_fixed_rect()
{
UI_pop_fixed_pos();
UI_pop_pref_size(Axis2_X);
UI_pop_pref_size(Axis2_Y);
}
root_function void
UI_set_next_fixed_rect(Rng2_F32 rect)
{
Vec2_F32 dim = dim2_F32(rect);
UI_set_next_fixed_pos(rect.p0);
UI_set_next_pref_size(Axis2_X, UI_pixels(dim.x, 1));
UI_set_next_pref_size(Axis2_Y, UI_pixels(dim.y, 1));
}
root_function Rng2_F32
UI_push_rect(Rng2_F32 rect)
{
Rng2_F32 replaced = {0};
Vec2_F32 size = dim2_F32(rect);
replaced.x0 = UI_push_fixed_x(rect.x0);
replaced.y0 = UI_push_fixed_y(rect.y0);
replaced.x1 = replaced.x0 + UI_push_fixed_width(size.x);
replaced.y1 = replaced.y0 + UI_push_fixed_height(size.y);
return replaced;
}
root_function Rng2_F32
UI_pop_rect(void)
{
Rng2_F32 popped = {0};
popped.x0 = UI_pop_fixed_x();
popped.y0 = UI_pop_fixed_y();
popped.x1 = popped.x0 + UI_pop_fixed_width();
popped.y1 = popped.y0 + UI_pop_fixed_height();
return popped;
}
////////////////////////////////
//~ Drawing and text
root_function Vec2_F32
UI_text_pos_from_box(UI_Box *box)
{
// The stb assumes that the supplied start position will give
// the _BASELINE_ of the text that is to be produced.
// So the text position we give here is adjusted to x of the box rect's p0,
// and to the y of the box rect's p1.
F32 offset_x_pixels = 0.1f*(box->rect.x1-box->rect.x0);
F32 offset_y_pixels = 0.30*(box->rect.y1-box->rect.y0);
Vec2_F32 result = {0};
result.x = box->rect.x0 + offset_x_pixels;
result.y = box->rect.y1 - offset_y_pixels;
return result;
}
root_function String8
UI_display_string_from_box(UI_Box *box)
{
return box->string;
}

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src/ui/ui_core.h
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/* date = March 25th 2024 10:14 pm */
#ifndef UI_CORE_H
#define UI_CORE_H
////////////////////////////////
//~ Keys
typedef enum UI_Color
{
UI_Color_Null,
UI_Color_PlainBackground,
UI_Color_PlainText,
UI_Color_PlainBorder,
UI_Color_PlainOverlay,
UI_Color_COUNT
} UI_Color;
////////////////////////////////
//~ Keys
// The UI Key is used to hash a "widget" so we can get events from it.
typedef struct UI_Key UI_Key;
struct UI_Key
{
U64 u64[1];
};
////////////////////////////////
//~ Mouse Button Kinds
typedef enum UI_MouseButtonKind
{
UI_MouseButtonKind_Left,
UI_MouseButtonKind_Middle,
UI_MouseButtonKind_Right,
UI_MouseButtonKind_COUNT
}
UI_MouseButtonKind;
////////////////////////////////
//~ Focus Types (for hot, active widget states)
typedef enum UI_FocusKind
{
UI_FocusKind_Null,
UI_FocusKind_Off,
UI_FocusKind_On,
UI_FocusKind_Root,
UI_FocusKind_COUNT
}
UI_FocusKind;
////////////////////////////////
//~ Semantic sizes
// The size kind specifies how the size of a box should be computed
typedef enum UI_SizeKind
{
UI_SizeKind_Pixels,
UI_SizeKind_TextDim,
UI_SizeKind_Percent,
UI_SizeKind_SizeByChildren,
UI_SizeKind_COUNT
}
UI_SizeKind;
typedef struct UI_Size UI_Size;
struct UI_Size
{
UI_SizeKind kind;
F32 value;
F32 strictness;
};
////////////////////////////////
//~ Main UI hierarchy
typedef enum UI_TextAlignment
{
UI_TextAlignment_Left,
UI_TextAlignment_COUNT,
}
UI_TextAlignment;
typedef U32 UI_BoxFlags;
enum
{
// Interaction
UI_BoxFlag_Disabled = (1<<0),
UI_BoxFlag_MouseClickable = (1<<1),
UI_BoxFlag_FocusHot = (1<<3),
UI_BoxFlag_FocusActive = (1<<4),
// Layout
UI_BoxFlag_FloatingX = (1<<5),
UI_BoxFlag_FloatingY = (1<<6),
UI_BoxFlag_FixedWidth = (1<<7),
UI_BoxFlag_FixedHeight = (1<<8),
UI_BoxFlag_OverflowX = (1<<9),
UI_BoxFlag_OverflowY = (1<<10),
// Appearance
UI_BoxFlag_Clip = (1<<11),
UI_BoxFlag_DrawText = (1<<12),
UI_BoxFlag_DrawBackground = (1<<13),
UI_BoxFlag_DrawBorder = (1<<14),
UI_BoxFlag_DrawHotEffects = (1<<15),
UI_BoxFlag_DrawActiveEffects = (1<<16),
UI_BoxFlag_DisableTextTruncate = (1<<17),
UI_BoxFlag_DrawDropShadow = (1<<18),
// Helpers, when either X or Y is active etc.
UI_BoxFlag_Floating = UI_BoxFlag_FloatingX | UI_BoxFlag_FloatingY,
UI_BoxFlag_Clickable = UI_BoxFlag_MouseClickable, //| UI_BoxFlag_KeyboardClickable,
};
// UI Box is the big struct that handles all of the information of a "node" in the ui hierarchy.
// The box is a part of the composition that can be described as a "widget".
// It has both the tree information adn the state information in it.
typedef struct UI_Box UI_Box;
struct UI_Box
{
// Hash links, persistent across frames
UI_Box *hash_next;
UI_Box *hash_prev;
// Tree link data, updates every frame.
// This enables us to encode an n-ary tree to describe the "box" hierarchy that defines the UI.
UI_Box *first;
UI_Box *last;
UI_Box *next;
UI_Box *prev;
UI_Box *parent;
U64 child_count;
// Key and generation info
UI_Key key;
U64 last_frame_touched_index;
// Per-build parameters
UI_BoxFlags flags;
String8 string;
Vec2_F32 fixed_position;
Vec2_F32 fixed_size;
UI_Size pref_size[Axis2_COUNT];
Axis2 child_layout_axis;
Vec4_F32 background_color;
Vec4_F32 text_color;
Vec4_F32 border_color;
Vec4_F32 overlay_color;
F32 corner_radii[Corner_COUNT];
// Post size determination
Vec2_F32 calc_size;
Vec2_F32 calc_rel_pos;
// Post-layout data
Rng2_F32 rel_rect;
Rng2_F32 rect;
// State that is persistent across frames
F32 hot_t;
F32 active_t;
F32 disabled_t;
F32 focus_hot_t;
F32 focus_active_t;
U64 first_gen_touched;
U64 last_gen_touched;
Vec2_F32 view_offset;
Vec2_F32 target_view_offset;
};
typedef struct UI_BoxRec UI_BoxRec;
struct UI_BoxRec
{
UI_Box *next;
S32 push_count;
S32 pop_count;
};
//~ Signal
typedef U32 UI_SignalFlags;
enum
{
// mouse press -> box was pressed while hovering
UI_SignalFlag_LeftPressed = (1<<0),
UI_SignalFlag_MiddlePressed = (1<<1),
UI_SignalFlag_RightPressed = (1<<2),
// released -> box was previously pressed & user released, in or out of bounds
UI_SignalFlag_LeftReleased = (1<<12),
UI_SignalFlag_MiddleReleased = (1<<13),
UI_SignalFlag_RightReleased = (1<<14),
// clicked -> box was previously pressed & user released, in bounds
UI_SignalFlag_LeftClicked = (1<<15),
UI_SignalFlag_MiddleClicked = (1<<16),
UI_SignalFlag_RightClicked = (1<<17),
UI_SignalFlag_Hovering = (1<<25), // hovering specifically this box
UI_SignalFlag_MouseOver = (1<<26), // mouse is over, but may be occluded
UI_SignalFlag_Pressed = UI_SignalFlag_LeftPressed | UI_SignalFlag_MiddlePressed | UI_SignalFlag_RightPressed,
UI_SignalFlag_Clicked = UI_SignalFlag_LeftClicked | UI_SignalFlag_MiddleClicked | UI_SignalFlag_RightClicked
};
// The UI Signal is the struct which carries the information about user interaction with a box
typedef struct UI_Signal UI_Signal;
struct UI_Signal
{
UI_Box *box;
UI_SignalFlags flag;
};
#define UI_hovering(s) !!((s).flag & UI_SignalFlag_Hovering)
#define UI_pressed(s) !!((s).flag & UI_SignalFlag_Pressed)
/////////////////////////////////
//~ Generated/meta
// This is "metaprogramming" code that eventually will be generated externally.
// Right now I am doing some thing by hand, but it basically contains macros that define
// different stack members for the UI state.
#include "ui_meta.h"
////////////////////////////////
//~ UI State
// This is a slot in the hash table that helps caching of UI boxes between frames.
typedef struct UI_BoxSlot UI_BoxSlot;
struct UI_BoxSlot
{
UI_Box *first;
UI_Box *last;
};
typedef struct UI_State UI_State;
struct UI_State
{
// Permanent state
U64 build_gen;
Arena *arena;
// Frame arenas. We have two since we want to use information from the previous frame to
// compute things in the current frame.
U32 last_frame_arena_index;
U32 current_frame_arena_index;
Arena *frame_arenas[2];
//- Persistent box state
UI_Box *first_free_box;
U64 free_box_list_count;
UI_BoxSlot *box_table;
U64 box_table_size;
//- Per UI build parameters
OS_Handle window;
OS_EventList *events;
UI_Box *root;
UI_Box *ctx_menu_root;
B32 ctx_menu_touched_this_frame;
Vec2_F32 mouse;
//- User interaction state
UI_Key hot_box_key;
UI_Key active_box_key[UI_MouseButtonKind_COUNT];
//- Color, rendering properties
Vec4_F32 colors[UI_Color_COUNT];
//- Context menu state
UI_Key ctx_menu_anchor_key;
UI_Key next_ctx_menu_anchor_key;
Vec2_F32 ctx_menu_anchor_box_last_pos;
Vec2_F32 ctx_menu_anchor_offset;
B32 ctx_menu_open;
B32 next_ctx_menu_open;
UI_Key ctx_menu_key;
B32 ctx_menu_changed;
// TODO(anton): tooltip root
// Stack state. Here Ryan uses generated code from metadesk. I will do it by hand to start with.
UI_declare_stack_nils;
UI_declare_stacks;
};
////////////////////////////////
//~ Globals
// Nil structs
global UI_Box ui_g_nil_box;
////////////////////////////////
//~ Basic type functions
//- Boxes
root_function B32 UI_box_is_nil(UI_Box *box);
#define UI_box_set_nil(b) ((b) = &ui_g_nil_box)
root_function UI_BoxRec UI_box_recurse_depth_first(UI_Box *box, UI_Box *stopper, MemberOffset sib, MemberOffset child);
#define UI_box_recurse_depth_first_post(box, stopper) UI_box_recurse_depth_first((box), (stopper), MemberOff(UI_Box, prev), MemberOff(UI_Box, last));
//- Sizes
root_function UI_Size UI_size_make(UI_SizeKind kind, F32 value, F32 strictness);
#define UI_pixels(v, strictness) UI_size_make(UI_SizeKind_Pixels, (v), (strictness))
#define UI_size_by_children(v, strictness) UI_size_make(UI_SizeKind_SizeByChildren, (v), (strictness))
#define UI_pct(v, strictness) UI_size_make(UI_SizeKind_Percent, (v), (strictness))
//- ID strings
root_function String8 UI_hash_part_from_box_string(String8 string);
//- Keys
root_function UI_Key UI_key_zero(void);
root_function UI_Key UI_key_from_string(UI_Key seed, String8 string);
root_function B32 UI_key_match(UI_Key a, UI_Key b);
//- Signal
root_function UI_Signal UI_signal_from_box(UI_Box *box);
////////////////////////////////
//~ UI State functions
root_function UI_State *UI_state_alloc(void);
root_function void UI_state_set(UI_State *ui);
////////////////////////////////
//~ Build phase
root_function void UI_build_begin(OS_Handle window, OS_EventList *events);
root_function void UI_build_end(void);
////////////////////////////////
//~ Context menu
root_function void UI_ctx_menu_open(UI_Key key, UI_Key anchor_key, Vec2_F32 anchor_offset);
root_function void UI_ctx_menu_close(void);
root_function B32 UI_begin_ctx_menu(UI_Key key);
root_function void UI_end_ctx_menu(void);
////////////////////////////////
//~ UI Frame
root_function Arena *UI_frame_arena(void);
root_function void UI_frame_begin(F32 delta_time);
root_function void UI_frame_end(void);
////////////////////////////////
//~ Box hierarchy construction
root_function UI_Box *UI_box_from_key(UI_Key key);
root_function UI_Box *UI_box_make_from_key(UI_BoxFlags flags, UI_Key key);
root_function UI_Box *UI_box_make(UI_BoxFlags flags, String8 string);
////////////////////////////////
//~ layout
root_function void UI_solve_independent_sizes(UI_Box *root, Axis2 axis);
root_function void UI_solve_upward_dependent_sizes(UI_Box *root, Axis2 axis);
root_function void UI_solve_downward_dependent_sizes(UI_Box *root, Axis2 axis);
root_function void UI_solve_size_violations(UI_Box *root, Axis2 axis);
root_function void UI_layout_root(UI_Box *root, Axis2 axis);
root_function void UI_layout(void);
////////////////////////////////
//~ Compositions
root_function void UI_push_pref_size(Axis2 axis, UI_Size v);
root_function void UI_pop_pref_size(Axis2 axis);
root_function void UI_set_next_pref_size(Axis2 axis, UI_Size v);
root_function void UI_push_fixed_pos(Vec2_F32 v);
root_function void UI_pop_fixed_pos();
root_function void UI_set_next_fixed_pos(Vec2_F32 v);
root_function void UI_push_fixed_rect(Rng2_F32 rect);
root_function void UI_pop_fixed_rect();
root_function void UI_set_next_fixed_rect(Rng2_F32 rect);
////////////////////////////////
//~ Drawing and text
root_function Vec2_F32 UI_text_pos_from_box(UI_Box *box);
root_function String8 UI_display_string_from_box(UI_Box *box);
////////////////////////////////
//~ Defer helpers
//- base
#define UI_parent(v) DeferLoop(UI_push_parent(v), UI_pop_parent())
#define UI_pref_width(v) DeferLoop(UI_push_pref_width(v), UI_pop_pref_width())
#define UI_pref_height(v) DeferLoop(UI_push_pref_height(v), UI_pop_pref_height())
//- pane
#define UI_pane(r, s) DeferLoop(UI_pane_begin((r), (s)), UI_pane_end())
//- compositions
#define UI_width_fill UI_pref_width(UI_pct(1, 0))
#define UI_height_fill UI_pref_height(UI_pct(1, 0))
#define UI_fixed_x(v) DeferLoop(UI_push_fixed_x((v)), UI_pop_fixed_x())
#define UI_fixed_y(v) DeferLoop(UI_push_fixed_y((v)), UI_pop_fixed_y())
#define UI_fixed_pos(v) DeferLoop(UI_push_fixed_pos(v), UI_pop_fixed_pos())
#define UI_ctx_menu(key) DeferLoopChecked(UI_begin_ctx_menu(key), UI_end_ctx_menu())
#endif //UI_CORE_H

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src/ui/ui_draw.c
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root_function void
UI_draw(void)
{
//OS_Handle window = ui_state->window;
for(UI_Box *box = ui_state->root, *next_box = &ui_g_nil_box; !UI_box_is_nil(box); box = next_box)
{
// We do a depth first recursion to go through the nodes.
// The post part means that the sibling is UI_Box prev, and the child is UI_Box last.
// TODO(anton): Draw this with pen and paper and make sure I understand how this works
UI_BoxRec rec = UI_box_recurse_depth_first_post(box, &ui_g_nil_box);
next_box = rec.next;
//- Draw shadow
if(box->flags & UI_BoxFlag_DrawDropShadow)
{
F32 shift = 3.0f; // TODO make relative precent, is pixelsn ow
Rng2_F32 shadow_rect = shift2_F32(pad2_F32(box->rect, 2), vec2_F32(shift, shift));
R_Rect2DInst *rect = D_rect2D(shadow_rect,
.color = vec4_F32(0, 0, 0, 1.f),
.corner_radius = 1,
.softness = 3.f,
.omit_texture = 1);
}
//- Draw background
if(box->flags & UI_BoxFlag_DrawBackground)
{
R_Rect2DInst *rect = D_rect2D(box->rect,
.color = box->background_color,
.corner_radius = 0.0f,
.softness = 0.0f,
.omit_texture = 1);
if(box->flags & UI_BoxFlag_DrawHotEffects)
{
if(UI_key_match(ui_state->hot_box_key, box->key))
{
rect->colors[Corner_00] = box->overlay_color;
rect->colors[Corner_10] = box->overlay_color;
rect->colors[Corner_01] = box->background_color;
rect->colors[Corner_11] = box->background_color;
}
}
}
//- Draw text
if(box->flags & UI_BoxFlag_DrawText)
{
// The stb assumes that the supplied start position will give
// the _BASELINE_ of the text that is to be produced.
// So the text position we give here is adjusted to x of the box rect's p0,
// and to the y of the box rect's p1.
Vec2_F32 text_pos = UI_text_pos_from_box(box);
String8 display_string = UI_display_string_from_box(box);
B32 truncated = 0;
if(!(box->flags & UI_BoxFlag_DisableTextTruncate))
{
// TODO(anton): Do stuff for truncating
D_text2D(text_pos, display_string, box->text_color);
}
}
//- Draw border
if(box->flags & UI_BoxFlag_DrawBorder)
{
Rng2_F32 border_rect = pad2_F32(box->rect, 0);
R_Rect2DInst *rect = D_rect2D(border_rect);
Vec4_F32 border_top_color = box->border_color;
Vec4_F32 border_bot_color = box->background_color;
rect->colors[Corner_00] = border_top_color;
rect->colors[Corner_10] = border_top_color;
rect->colors[Corner_01] = border_bot_color;
rect->colors[Corner_11] = border_bot_color;
rect->corner_radii[Corner_00] = 1;
rect->corner_radii[Corner_10] = 1;
rect->corner_radii[Corner_01] = 1;
rect->corner_radii[Corner_11] = 1;
rect->border_thickness = 1.f;
rect->softness = 0.f;
rect->omit_texture = 1;
}
}
}

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src/ui/ui_draw.h
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/* date = April 2nd 2024 3:11 pm */
#ifndef UI_DRAW_H
#define UI_DRAW_H
root_function void UI_draw(void);
#endif //UI_DRAW_H

3
src/ui/ui_inc.c
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#include "ui_core.c"
#include "ui_basic_widgets.c"
#include "ui_draw.c"

10
src/ui/ui_inc.h
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/* date = March 25th 2024 10:14 pm */
#ifndef UI_INC_H
#define UI_INC_H
#include "ui_core.h"
#include "ui_basic_widgets.h"
#include "ui_draw.h"
#endif //UI_INC_H

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src/ui/ui_meta.c
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// TODO(anton): This code should be generated by some metaprogram at some point.
// Macro that generalises the code for setting the next implementation on
// a particular stack.
// The convention is that a node type has UI_<name_upper>Node,
// and the corresponding stack struct in the UI state has a top pointer, a free pointer and an auto_pop B32 value.
// And that struct is called <name_lower>_stack.
// The nodes have values of different types, which the <type> argument to this macro designates.
// A ParentNode, for example, has a UI_Box *value, and the PrefWidth has a UI_Size value.
#define UI_stack_top_impl(state, name_upper, name_lower) \
return state->name_lower##_stack.top->v;
#define UI_stack_push_impl(state, name_upper, name_lower, type, new_value) \
UI_##name_upper##Node *node = state->name_lower##_stack.free; \
if(node != 0) {StackPop(state->name_lower##_stack.free);} \
else {node = PushArrayZero(UI_frame_arena(), UI_##name_upper##Node, 1);} \
type old_value = state->name_lower##_stack.top->v; \
node->v = new_value; \
StackPush(state->name_lower##_stack.top, node); \
state->name_lower##_stack.auto_pop = 0; \
return old_value;
#define UI_stack_pop_impl(state, name_upper, name_lower) \
UI_##name_upper##Node *popped = state->name_lower##_stack.top;\
if(popped != &state->name_lower##_nil_stack_top)\
{\
StackPop(state->name_lower##_stack.top);\
StackPush(state->name_lower##_stack.free, popped);\
state->name_lower##_stack.auto_pop = 0;\
}\
return popped->v;\
// NOTE(anton): Only difference from push is auto pop = 1?
#define UI_stack_set_next_impl(state, name_upper, name_lower, type, new_value) \
UI_##name_upper##Node *node = state->name_lower##_stack.free; \
if(node != 0) {StackPop(state->name_lower##_stack.free);}\
else {node = PushArray(UI_frame_arena(), UI_##name_upper##Node, 1);}\
type old_value = state->name_lower##_stack.top->v;\
node->v = new_value;\
StackPush(state->name_lower##_stack.top, node);\
state->name_lower##_stack.auto_pop = 1;\
return old_value;
///////////////////////////////////////
//~ Stack functions
//- Top
root_function UI_Box *UI_top_parent(void) { UI_stack_top_impl(ui_state, Parent, parent) }
root_function UI_BoxFlags UI_top_flags(void) { UI_stack_top_impl(ui_state, Flags, flags) }
root_function F32 UI_top_fixed_x(void) { UI_stack_top_impl(ui_state, FixedX, fixed_x) }
root_function F32 UI_top_fixed_y(void) { UI_stack_top_impl(ui_state, FixedY, fixed_y) }
root_function F32 UI_top_fixed_width(void) { UI_stack_top_impl(ui_state, FixedWidth, fixed_width) }
root_function F32 UI_top_fixed_height(void) { UI_stack_top_impl(ui_state, FixedHeight, fixed_height) }
root_function UI_Key UI_top_seed_key(void) { UI_stack_top_impl(ui_state, SeedKey, seed_key) }
root_function UI_Size UI_top_pref_width(void) { UI_stack_top_impl(ui_state, PrefWidth, pref_width) }
root_function UI_Size UI_top_pref_height(void) { UI_stack_top_impl(ui_state, PrefHeight, pref_height) }
root_function Axis2 UI_top_child_layout_axis(void) { UI_stack_top_impl(ui_state, ChildLayoutAxis, child_layout_axis) }
//- Push
root_function UI_Box *UI_push_parent(UI_Box *v) { UI_stack_push_impl(ui_state, Parent, parent, UI_Box *, v) }
root_function UI_BoxFlags UI_push_flags(UI_BoxFlags v) { UI_stack_push_impl(ui_state, Flags, flags, UI_BoxFlags, v) }
root_function F32 UI_push_fixed_x(F32 v) { UI_stack_push_impl(ui_state, FixedX, fixed_x, F32, v) }
root_function F32 UI_push_fixed_y(F32 v) { UI_stack_push_impl(ui_state, FixedY, fixed_y, F32, v) }
root_function F32 UI_push_fixed_width(F32 v) { UI_stack_push_impl(ui_state, FixedWidth, fixed_width, F32, v) }
root_function F32 UI_push_fixed_height(F32 v) { UI_stack_push_impl(ui_state, FixedHeight, fixed_height, F32, v) }
root_function UI_Key UI_push_seed_key(UI_Key v) { UI_stack_push_impl(ui_state, SeedKey, seed_key, UI_Key, v) }
root_function UI_Size UI_push_pref_width(UI_Size v) { UI_stack_push_impl(ui_state, PrefWidth, pref_width, UI_Size, v) }
root_function UI_Size UI_push_pref_height(UI_Size v) { UI_stack_push_impl(ui_state, PrefHeight, pref_height, UI_Size, v) }
root_function Axis2 UI_push_child_layout_axis(Axis2 v) { UI_stack_push_impl(ui_state, ChildLayoutAxis, child_layout_axis, Axis2, v) }
//- Pop
root_function UI_Box *UI_pop_parent(void) { UI_stack_pop_impl(ui_state, Parent, parent) }
root_function UI_BoxFlags UI_pop_flags(void) { UI_stack_pop_impl(ui_state, Flags, flags) }
root_function F32 UI_pop_fixed_x(void) { UI_stack_pop_impl(ui_state, FixedX, fixed_x) }
root_function F32 UI_pop_fixed_y(void) { UI_stack_pop_impl(ui_state, FixedY, fixed_y) }
root_function F32 UI_pop_fixed_width(void) { UI_stack_pop_impl(ui_state, FixedWidth, fixed_width) }
root_function F32 UI_pop_fixed_height(void) { UI_stack_pop_impl(ui_state, FixedHeight, fixed_height) }
root_function UI_Key UI_pop_seed_key(void) { UI_stack_pop_impl(ui_state, SeedKey, seed_key) }
root_function UI_Size UI_pop_pref_width(void) { UI_stack_pop_impl(ui_state, PrefWidth, pref_width) }
root_function UI_Size UI_pop_pref_height(void) { UI_stack_pop_impl(ui_state, PrefHeight, pref_height) }
root_function Axis2 UI_pop_child_layout_axis(void) { UI_stack_pop_impl(ui_state, ChildLayoutAxis, child_layout_axis) }
//- Set next
root_function UI_Box *UI_set_next_parent(UI_Box *v) { UI_stack_set_next_impl(ui_state, Parent, parent, UI_Box *, v) }
root_function UI_BoxFlags UI_set_next_flags(UI_BoxFlags v) { UI_stack_set_next_impl(ui_state, Flags, flags, UI_BoxFlags, v) }
root_function F32 UI_set_next_fixed_x(F32 v) { UI_stack_set_next_impl(ui_state, FixedX, fixed_x, F32, v) }
root_function F32 UI_set_next_fixed_y(F32 v) { UI_stack_set_next_impl(ui_state, FixedY, fixed_y, F32, v) }
root_function F32 UI_set_next_fixed_width(F32 v) { UI_stack_set_next_impl(ui_state, FixedWidth, fixed_width, F32, v) }
root_function F32 UI_set_next_fixed_height(F32 v) { UI_stack_set_next_impl(ui_state, FixedHeight, fixed_height, F32, v) }
root_function UI_Key UI_set_next_seed_key(UI_Key v) { UI_stack_set_next_impl(ui_state, SeedKey, seed_key, UI_Key, v) }
root_function UI_Size UI_set_next_pref_width(UI_Size v) { UI_stack_set_next_impl(ui_state, PrefWidth, pref_width, UI_Size, v) }
root_function UI_Size UI_set_next_pref_height(UI_Size v) { UI_stack_set_next_impl(ui_state, PrefHeight, pref_height, UI_Size, v) }
root_function Axis2 UI_set_next_child_layout_axis(Axis2 v) { UI_stack_set_next_impl(ui_state, ChildLayoutAxis, child_layout_axis, Axis2, v) }
#define UI_auto_pop_stacks(state) \
if(state->parent_stack.auto_pop) { UI_pop_parent(); state->parent_stack.auto_pop = 0; }\
if(state->flags_stack.auto_pop) { UI_pop_flags(); state->flags_stack.auto_pop = 0; }\
if(state->fixed_x_stack.auto_pop) { UI_pop_fixed_x(); state->fixed_x_stack.auto_pop = 0; }\
if(state->fixed_y_stack.auto_pop) { UI_pop_fixed_y(); state->fixed_y_stack.auto_pop = 0; }\
if(state->fixed_x_stack.auto_pop) { UI_pop_fixed_width(); state->fixed_width_stack.auto_pop = 0; }\
if(state->fixed_y_stack.auto_pop) { UI_pop_fixed_height(); state->fixed_height_stack.auto_pop = 0; }\
if(state->seed_key_stack.auto_pop) { UI_pop_seed_key(); state->seed_key_stack.auto_pop = 0; }\
if(state->pref_width_stack.auto_pop) { UI_pop_pref_width(); state->pref_width_stack.auto_pop = 0; }\
if(state->pref_height_stack.auto_pop) { UI_pop_pref_height(); state->pref_height_stack.auto_pop = 0; }\
if(state->child_layout_axis_stack.auto_pop) { UI_pop_child_layout_axis(); state->child_layout_axis_stack.auto_pop = 0; }\

80
src/ui/ui_meta.h
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@ -1,80 +0,0 @@
/* date = April 1st 2024 9:04 pm */
#ifndef UI_META_H
#define UI_META_H
// TODO(anton): This code should be generated by a metaprogram at some point.
//~ Node structs
typedef struct UI_ParentNode UI_ParentNode; struct UI_ParentNode{UI_ParentNode *next; UI_Box * v;};
typedef struct UI_FlagsNode UI_FlagsNode; struct UI_FlagsNode{UI_FlagsNode *next; UI_BoxFlags v;};
typedef struct UI_FixedXNode UI_FixedXNode; struct UI_FixedXNode{UI_FixedXNode *next; F32 v;};
typedef struct UI_FixedYNode UI_FixedYNode; struct UI_FixedYNode{UI_FixedYNode *next; F32 v;};
typedef struct UI_FixedWidthNode UI_FixedWidthNode; struct UI_FixedWidthNode{UI_FixedWidthNode *next; F32 v;};
typedef struct UI_FixedHeightNode UI_FixedHeightNode; struct UI_FixedHeightNode{UI_FixedHeightNode *next; F32 v;};
typedef struct UI_PrefWidthNode UI_PrefWidthNode; struct UI_PrefWidthNode{UI_PrefWidthNode *next; UI_Size v;};
typedef struct UI_PrefHeightNode UI_PrefHeightNode; struct UI_PrefHeightNode{UI_PrefHeightNode *next; UI_Size v;};
typedef struct UI_ChildLayoutAxisNode UI_ChildLayoutAxisNode; struct UI_ChildLayoutAxisNode{UI_ChildLayoutAxisNode *next; Axis2 v;};
typedef struct UI_SeedKeyNode UI_SeedKeyNode; struct UI_SeedKeyNode{UI_SeedKeyNode *next; UI_Key v;};
//~ Declaration macros for use in the UI_State
//- Stacks
#define UI_declare_stacks \
struct \
{ \
struct { UI_ParentNode *top; UI_ParentNode *free; B32 auto_pop; } parent_stack; \
struct { UI_FlagsNode *top; UI_FlagsNode *free; B32 auto_pop; } flags_stack; \
struct { UI_FixedXNode *top; UI_FixedXNode *free; B32 auto_pop; } fixed_x_stack; \
struct { UI_FixedYNode *top; UI_FixedYNode *free; B32 auto_pop; } fixed_y_stack; \
struct { UI_FixedWidthNode *top; UI_FixedWidthNode *free; B32 auto_pop; } fixed_width_stack; \
struct { UI_FixedHeightNode *top; UI_FixedHeightNode *free; B32 auto_pop; } fixed_height_stack; \
struct { UI_PrefWidthNode *top; UI_PrefWidthNode *free; B32 auto_pop; } pref_width_stack; \
struct { UI_PrefHeightNode *top; UI_PrefHeightNode *free; B32 auto_pop; } pref_height_stack; \
struct { UI_ChildLayoutAxisNode *top; UI_ChildLayoutAxisNode *free; B32 auto_pop; } child_layout_axis_stack; \
struct { UI_SeedKeyNode *top; UI_SeedKeyNode *free; B32 auto_pop; } seed_key_stack; \
}
#define UI_init_stacks(state) \
state->parent_stack.top = &state->parent_nil_stack_top; state->parent_stack.free = 0; state->parent_stack.auto_pop = 0; \
state->flags_stack.top = &state->flags_nil_stack_top; state->flags_stack.free = 0; state->flags_stack.auto_pop = 0; \
state->fixed_x_stack.top = &state->fixed_x_nil_stack_top; state->fixed_x_stack.free = 0; state->fixed_x_stack.auto_pop = 0;\
state->fixed_y_stack.top = &state->fixed_y_nil_stack_top; state->fixed_y_stack.free = 0; state->fixed_y_stack.auto_pop = 0;\
state->fixed_width_stack.top = &state->fixed_width_nil_stack_top; state->fixed_width_stack.free = 0; state->fixed_width_stack.auto_pop = 0;\
state->fixed_height_stack.top = &state->fixed_height_nil_stack_top; state->fixed_height_stack.free = 0; state->fixed_height_stack.auto_pop = 0;\
state->pref_width_stack.top = &state->pref_width_nil_stack_top; state->pref_width_stack.free = 0; state->pref_width_stack.auto_pop = 0; \
state->pref_height_stack.top = &state->pref_height_nil_stack_top; state->pref_height_stack.free = 0; state->pref_height_stack.auto_pop = 0; \
state->child_layout_axis_stack.top = &state->child_layout_axis_nil_stack_top; state->child_layout_axis_stack.free = 0; state->child_layout_axis_stack.auto_pop = 0; \
state->seed_key_stack.top = &state->seed_key_nil_stack_top; state->seed_key_stack.free = 0; state->seed_key_stack.auto_pop = 0; \
//- Stack nils
#define UI_declare_stack_nils \
struct \
{ \
UI_ParentNode parent_nil_stack_top; \
UI_FlagsNode flags_nil_stack_top; \
UI_FixedXNode fixed_x_nil_stack_top; \
UI_FixedYNode fixed_y_nil_stack_top; \
UI_FixedWidthNode fixed_width_nil_stack_top; \
UI_FixedHeightNode fixed_height_nil_stack_top; \
UI_PrefWidthNode pref_width_nil_stack_top; \
UI_PrefHeightNode pref_height_nil_stack_top; \
UI_ChildLayoutAxisNode child_layout_axis_nil_stack_top; \
UI_SeedKeyNode seed_key_nil_stack_top; \
}
#define UI_init_stack_nils(state) \
state->parent_nil_stack_top.v = &ui_g_nil_box; \
state->flags_nil_stack_top.v = 0; \
state->fixed_x_nil_stack_top.v = 0; \
state->fixed_y_nil_stack_top.v = 0; \
state->fixed_width_nil_stack_top.v = 0; \
state->fixed_height_nil_stack_top.v = 0; \
state->pref_width_nil_stack_top.v = UI_pixels(200.f, 1.f); \
state->pref_height_nil_stack_top.v = UI_pixels(2.f, 1.f); \
state->child_layout_axis_nil_stack_top.v = Axis2_X;\
state->seed_key_nil_stack_top.v = UI_key_zero(); \
#endif //UI_META_H