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FreeType: Minor tweaks previous commit (#2285)

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This commit is contained in:
omar 2019-01-15 21:50:43 +01:00
parent daac9c7559
commit 09f1cb642b
5 changed files with 33 additions and 33 deletions
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1
docs/CHANGELOG.txt
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@ -34,6 +34,7 @@ HOW TO UPDATE?
-----------------------------------------------------------------------
Other Changes:
- Fonts: imgui_freetype: Added support for imgui allocators + custom FreeType only SetAllocatorFunctions. (#2285) [@Vuhdo]
- Examples: Win32: Using GetForegroundWindow() instead of GetActiveWindow() to be compatible with windows created
in a different thread. (#1951, #2087, #2156, #2232) [many people]
- Examples: Win32: Added support for XInput games (if ImGuiConfigFlags_NavEnableGamepad is enabled).

2
imgui.cpp
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@ -2951,7 +2951,7 @@ bool ImGui::DebugCheckVersionAndDataLayout(const char* version, size_t sz_io, si
return !error;
}
void ImGui::SetAllocatorFunctions(void* (*alloc_func)(size_t sz, void* user_data), void(*free_func)(void* ptr, void* user_data), void* user_data)
void ImGui::SetAllocatorFunctions(void* (*alloc_func)(size_t sz, void* user_data), void (*free_func)(void* ptr, void* user_data), void* user_data)
{
GImAllocatorAllocFunc = alloc_func;
GImAllocatorFreeFunc = free_func;

2
imgui.h
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@ -670,7 +670,7 @@ namespace ImGui
// Memory Utilities
// - All those functions are not reliant on the current context.
// - If you reload the contents of imgui.cpp at runtime, you may need to call SetCurrentContext() + SetAllocatorFunctions() again.
IMGUI_API void SetAllocatorFunctions(void* (*alloc_func)(size_t sz, void* user_data), void(*free_func)(void* ptr, void* user_data), void* user_data = NULL);
IMGUI_API void SetAllocatorFunctions(void* (*alloc_func)(size_t sz, void* user_data), void (*free_func)(void* ptr, void* user_data), void* user_data = NULL);
IMGUI_API void* MemAlloc(size_t size);
IMGUI_API void MemFree(void* ptr);

57
misc/freetype/imgui_freetype.cpp
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@ -5,12 +5,13 @@
// Changelog:
// - v0.50: (2017/08/16) imported from https://github.com/Vuhdo/imgui_freetype into http://www.github.com/ocornut/imgui_club, updated for latest changes in ImFontAtlas, minor tweaks.
// - v0.51: (2017/08/26) cleanup, optimizations, support for ImFontConfig::RasterizerFlags, ImFontConfig::RasterizerMultiply.
// - v0.52: (2017/09/26) fixes for imgui internal changes
// - v0.53: (2017/10/22) minor inconsequential change to match change in master (removed an unnecessary statement)
// - v0.54: (2018/01/22) fix for addition of ImFontAtlas::TexUvscale member
// - v0.52: (2017/09/26) fixes for imgui internal changes.
// - v0.53: (2017/10/22) minor inconsequential change to match change in master (removed an unnecessary statement).
// - v0.54: (2018/01/22) fix for addition of ImFontAtlas::TexUvscale member.
// - v0.55: (2018/02/04) moved to main imgui repository (away from http://www.github.com/ocornut/imgui_club)
// - v0.56: (2018/06/08) added support for ImFontConfig::GlyphMinAdvanceX, GlyphMaxAdvanceX
// - v0.56: (2018/06/08) added support for ImFontConfig::GlyphMinAdvanceX, GlyphMaxAdvanceX.
// - v0.60: (2019/01/10) re-factored to match big update in STB builder. fixed texture height waste. fixed redundant glyphs when merging. support for glyph padding.
// - v0.61: (2019/01/15) added support for imgui allocators + added FreeType only override function SetAllocatorFunctions().
// Gamma Correct Blending:
// FreeType assumes blending in linear space rather than gamma space.
@ -565,46 +566,44 @@ bool ImFontAtlasBuildWithFreeType(FT_Library ft_library, ImFontAtlas* atlas, uns
return true;
}
// Default memory allocators
static void* ImFreeTypeDefaultAllocFunc(size_t size, void* user_data) { (void)user_data; return ImGui::MemAlloc(size); }
static void ImFreeTypeDefaultFreeFunc(void* ptr, void* user_data) { (void)user_data; ImGui::MemFree(ptr); }
static void ImFreeTypeDefaultFreeFunc(void* ptr, void* user_data) { (void)user_data; ImGui::MemFree(ptr); }
// Current memory allocators
static void* (*GImFreeTypeAllocFunc)(size_t size, void* user_data) = ImFreeTypeDefaultAllocFunc;
static void (*GImFreeTypeFreeFunc)(void* ptr, void* user_data) = ImFreeTypeDefaultFreeFunc;
static void (*GImFreeTypeFreeFunc)(void* ptr, void* user_data) = ImFreeTypeDefaultFreeFunc;
static void* GImFreeTypeAllocatorUserData = NULL;
static void* FreeType_Alloc(FT_Memory memory, long size)
// FreeType memory allocation callbacks
static void* FreeType_Alloc(FT_Memory /*memory*/, long size)
{
(void)memory;
return GImFreeTypeAllocFunc(size, GImFreeTypeAllocatorUserData);
return GImFreeTypeAllocFunc((size_t)size, GImFreeTypeAllocatorUserData);
}
static void FreeType_Free(FT_Memory memory, void* block)
static void FreeType_Free(FT_Memory /*memory*/, void* block)
{
(void)memory;
GImFreeTypeFreeFunc(block, GImFreeTypeAllocatorUserData);
}
static void* FreeType_Realloc(FT_Memory memory, long cur_size, long new_size, void* block)
static void* FreeType_Realloc(FT_Memory /*memory*/, long cur_size, long new_size, void* block)
{
// Implement realloc() as we don't ask user to provide it.
(void)memory;
if (!block)
return GImFreeTypeAllocFunc(new_size, GImFreeTypeAllocatorUserData);
if (block == NULL)
return GImFreeTypeAllocFunc((size_t)new_size, GImFreeTypeAllocatorUserData);
if (new_size == 0)
{
GImFreeTypeFreeFunc(block, GImFreeTypeAllocatorUserData);
return nullptr;
return NULL;
}
if (new_size > cur_size)
{
void* new_block = GImFreeTypeAllocFunc(new_size, GImFreeTypeAllocatorUserData);
memcpy(new_block, block, cur_size);
void* new_block = GImFreeTypeAllocFunc((size_t)new_size, GImFreeTypeAllocatorUserData);
memcpy(new_block, block, (size_t)cur_size);
GImFreeTypeFreeFunc(block, GImFreeTypeAllocatorUserData);
block = new_block;
return new_block;
}
return block;
@ -613,18 +612,18 @@ static void* FreeType_Realloc(FT_Memory memory, long cur_size, long new_size, vo
bool ImGuiFreeType::BuildFontAtlas(ImFontAtlas* atlas, unsigned int extra_flags)
{
// FreeType memory management: https://www.freetype.org/freetype2/docs/design/design-4.html
FT_MemoryRec_ memoryRec = {0};
memoryRec.alloc = &FreeType_Alloc;
memoryRec.free = &FreeType_Free;
memoryRec.realloc = &FreeType_Realloc;
FT_MemoryRec_ memory_rec = { 0 };
memory_rec.alloc = &FreeType_Alloc;
memory_rec.free = &FreeType_Free;
memory_rec.realloc = &FreeType_Realloc;
// https://www.freetype.org/freetype2/docs/reference/ft2-module_management.html#FT_New_Library
FT_Library ft_library;
FT_Error error = FT_New_Library(&memoryRec, &ft_library);
FT_Error error = FT_New_Library(&memory_rec, &ft_library);
if (error != 0)
return false;
// NB: If you don't call FT_Add_Default_Modules() the rest of code may work, but FreeType won't use our custom allocator.
// If you don't call FT_Add_Default_Modules() the rest of code may work, but FreeType won't use our custom allocator.
FT_Add_Default_Modules(ft_library);
bool ret = ImFontAtlasBuildWithFreeType(ft_library, atlas, extra_flags);
@ -633,9 +632,9 @@ bool ImGuiFreeType::BuildFontAtlas(ImFontAtlas* atlas, unsigned int extra_flags)
return ret;
}
void ImGuiFreeType::SetAllocatorFunctions(void* (*alloc_func)(size_t sz, void* user_data), void(*free_func)(void* ptr, void* user_data), void* user_data)
void ImGuiFreeType::SetAllocatorFunctions(void* (*alloc_func)(size_t sz, void* user_data), void (*free_func)(void* ptr, void* user_data), void* user_data)
{
GImFreeTypeAllocFunc = alloc_func;
GImFreeTypeFreeFunc = free_func;
GImFreeTypeAllocatorUserData = user_data;
}
}

4
misc/freetype/imgui_freetype.h
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@ -29,7 +29,7 @@ namespace ImGuiFreeType
IMGUI_API bool BuildFontAtlas(ImFontAtlas* atlas, unsigned int extra_flags = 0);
// FreeType does lots of allocations so user might want to provide separate memory heap.
// By default ImGuiFreeType will use ImGui::MemAlloc()/MemFree().
IMGUI_API void SetAllocatorFunctions(void* (*alloc_func)(size_t sz, void* user_data), void(*free_func)(void* ptr, void* user_data), void* user_data = NULL);
// However, as FreeType does lots of allocations we provide a way for the user to redirect it to a separate memory heap if desired:
IMGUI_API void SetAllocatorFunctions(void* (*alloc_func)(size_t sz, void* user_data), void (*free_func)(void* ptr, void* user_data), void* user_data = NULL);
}