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imgui_freetype: removed anonymous namespace + extracting two functions outside of ImGui_ImplFreeType_FontSrcData.
This commit is contained in:
ocornut
@@ -110,210 +110,205 @@ static FT_Error ImGuiLunasvgPortPresetSlot(FT_GlyphSlot slot, FT_Bool cache, FT_
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#define FT_CEIL(X) (((X + 63) & -64) / 64) // From SDL_ttf: Handy routines for converting from fixed point
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#define FT_SCALEFACTOR 64.0f
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namespace
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// Glyph metrics:
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// --------------
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//
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// xmin xmax
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// | |
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// |<-------- width -------->|
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// | |
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// | +-------------------------+----------------- ymax
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// | | ggggggggg ggggg | ^ ^
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// | | g:::::::::ggg::::g | | |
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// | | g:::::::::::::::::g | | |
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// | | g::::::ggggg::::::gg | | |
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// | | g:::::g g:::::g | | |
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// offsetX -|-------->| g:::::g g:::::g | offsetY |
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// | | g:::::g g:::::g | | |
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// | | g::::::g g:::::g | | |
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// | | g:::::::ggggg:::::g | | |
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// | | g::::::::::::::::g | | height
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// | | gg::::::::::::::g | | |
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// baseline ---*---------|---- gggggggg::::::g-----*-------- |
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// / | | g:::::g | |
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// origin | | gggggg g:::::g | |
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// | | g:::::gg gg:::::g | |
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// | | g::::::ggg:::::::g | |
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// | | gg:::::::::::::g | |
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// | | ggg::::::ggg | |
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// | | gggggg | v
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// | +-------------------------+----------------- ymin
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// | |
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// |------------- advanceX ----------->|
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// Stored in ImFontAtlas::FontLoaderData. ALLOCATED BY US.
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struct ImGui_ImplFreeType_Data
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{
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// Glyph metrics:
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// --------------
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//
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// xmin xmax
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// | |
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// |<-------- width -------->|
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// | |
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// | +-------------------------+----------------- ymax
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// | | ggggggggg ggggg | ^ ^
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// | | g:::::::::ggg::::g | | |
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// | | g:::::::::::::::::g | | |
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// | | g::::::ggggg::::::gg | | |
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// | | g:::::g g:::::g | | |
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// offsetX -|-------->| g:::::g g:::::g | offsetY |
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// | | g:::::g g:::::g | | |
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// | | g::::::g g:::::g | | |
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// | | g:::::::ggggg:::::g | | |
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// | | g::::::::::::::::g | | height
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// | | gg::::::::::::::g | | |
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// baseline ---*---------|---- gggggggg::::::g-----*-------- |
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// / | | g:::::g | |
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// origin | | gggggg g:::::g | |
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// | | g:::::gg gg:::::g | |
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// | | g::::::ggg:::::::g | |
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// | | gg:::::::::::::g | |
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// | | ggg::::::ggg | |
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// | | gggggg | v
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// | +-------------------------+----------------- ymin
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// | |
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// |------------- advanceX ----------->|
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FT_Library Library;
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FT_MemoryRec_ MemoryManager;
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ImGui_ImplFreeType_Data() { memset((void*)this, 0, sizeof(*this)); }
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};
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// Stored in ImFontAtlas::FontLoaderData. ALLOCATED BY US.
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struct ImGui_ImplFreeType_Data
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// Stored in ImFontConfig::FontLoaderData. ALLOCATED BY US.
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struct ImGui_ImplFreeType_FontSrcData
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{
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// Initialize from an external data buffer. Doesn't copy data, and you must ensure it stays valid up to this object lifetime.
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bool InitFont(FT_Library ft_library, ImFontConfig* src, ImGuiFreeTypeBuilderFlags extra_user_flags);
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void CloseFont();
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ImGui_ImplFreeType_FontSrcData() { memset((void*)this, 0, sizeof(*this)); }
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~ImGui_ImplFreeType_FontSrcData() { CloseFont(); }
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// Members
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FT_Face FtFace;
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ImGuiFreeTypeBuilderFlags UserFlags; // = ImFontConfig::FontBuilderFlags
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FT_Int32 LoadFlags;
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ImFontBaked* BakedLastActivated;
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};
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// Stored in ImFontBaked::FontLoaderDatas: pointer to SourcesCount instances of this. ALLOCATED BY CORE.
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struct ImGui_ImplFreeType_FontSrcBakedData
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{
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FT_Size FtSize; // This represent a FT_Face with a given size.
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ImGui_ImplFreeType_FontSrcBakedData() { memset((void*)this, 0, sizeof(*this)); }
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};
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bool ImGui_ImplFreeType_FontSrcData::InitFont(FT_Library ft_library, ImFontConfig* src, ImGuiFreeTypeBuilderFlags extra_font_builder_flags)
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{
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FT_Error error = FT_New_Memory_Face(ft_library, (uint8_t*)src->FontData, (uint32_t)src->FontDataSize, (uint32_t)src->FontNo, &FtFace);
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if (error != 0)
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return false;
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error = FT_Select_Charmap(FtFace, FT_ENCODING_UNICODE);
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if (error != 0)
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return false;
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// Convert to FreeType flags (NB: Bold and Oblique are processed separately)
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UserFlags = (ImGuiFreeTypeBuilderFlags)(src->FontBuilderFlags | extra_font_builder_flags);
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LoadFlags = 0;
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if ((UserFlags & ImGuiFreeTypeBuilderFlags_Bitmap) == 0)
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LoadFlags |= FT_LOAD_NO_BITMAP;
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if (UserFlags & ImGuiFreeTypeBuilderFlags_NoHinting)
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LoadFlags |= FT_LOAD_NO_HINTING;
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else
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src->PixelSnapH = true; // FIXME: A bit weird to do this this way.
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if (UserFlags & ImGuiFreeTypeBuilderFlags_NoAutoHint)
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LoadFlags |= FT_LOAD_NO_AUTOHINT;
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if (UserFlags & ImGuiFreeTypeBuilderFlags_ForceAutoHint)
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LoadFlags |= FT_LOAD_FORCE_AUTOHINT;
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if (UserFlags & ImGuiFreeTypeBuilderFlags_LightHinting)
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LoadFlags |= FT_LOAD_TARGET_LIGHT;
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else if (UserFlags & ImGuiFreeTypeBuilderFlags_MonoHinting)
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LoadFlags |= FT_LOAD_TARGET_MONO;
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else
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LoadFlags |= FT_LOAD_TARGET_NORMAL;
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if (UserFlags & ImGuiFreeTypeBuilderFlags_LoadColor)
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LoadFlags |= FT_LOAD_COLOR;
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return true;
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}
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void ImGui_ImplFreeType_FontSrcData::CloseFont()
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{
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if (FtFace)
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{
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FT_Library Library;
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FT_MemoryRec_ MemoryManager;
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ImGui_ImplFreeType_Data() { memset((void*)this, 0, sizeof(*this)); }
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};
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// Stored in ImFontConfig::FontLoaderData. ALLOCATED BY US.
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struct ImGui_ImplFreeType_FontSrcData
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{
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// Initialize from an external data buffer. Doesn't copy data, and you must ensure it stays valid up to this object lifetime.
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bool InitFont(FT_Library ft_library, ImFontConfig* src, ImGuiFreeTypeBuilderFlags extra_user_flags);
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void CloseFont();
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const FT_Glyph_Metrics* LoadGlyph(uint32_t in_codepoint);
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void BlitGlyph(const FT_Bitmap* ft_bitmap, uint32_t* dst, uint32_t dst_pitch);
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ImGui_ImplFreeType_FontSrcData() { memset((void*)this, 0, sizeof(*this)); }
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~ImGui_ImplFreeType_FontSrcData() { CloseFont(); }
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// Members
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FT_Face FtFace;
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ImGuiFreeTypeBuilderFlags UserFlags; // = ImFontConfig::FontBuilderFlags
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FT_Int32 LoadFlags;
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ImFontBaked* BakedLastActivated;
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};
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// Stored in ImFontBaked::FontLoaderDatas: pointer to SourcesCount instances of this. ALLOCATED BY CORE.
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struct ImGui_ImplFreeType_FontSrcBakedData
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{
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FT_Size FtSize; // This represent a FT_Face with a given size.
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ImGui_ImplFreeType_FontSrcBakedData() { memset((void*)this, 0, sizeof(*this)); }
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};
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bool ImGui_ImplFreeType_FontSrcData::InitFont(FT_Library ft_library, ImFontConfig* src, ImGuiFreeTypeBuilderFlags extra_font_builder_flags)
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{
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FT_Error error = FT_New_Memory_Face(ft_library, (uint8_t*)src->FontData, (uint32_t)src->FontDataSize, (uint32_t)src->FontNo, &FtFace);
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if (error != 0)
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return false;
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error = FT_Select_Charmap(FtFace, FT_ENCODING_UNICODE);
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if (error != 0)
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return false;
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// Convert to FreeType flags (NB: Bold and Oblique are processed separately)
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UserFlags = (ImGuiFreeTypeBuilderFlags)(src->FontBuilderFlags | extra_font_builder_flags);
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LoadFlags = 0;
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if ((UserFlags & ImGuiFreeTypeBuilderFlags_Bitmap) == 0)
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LoadFlags |= FT_LOAD_NO_BITMAP;
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if (UserFlags & ImGuiFreeTypeBuilderFlags_NoHinting)
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LoadFlags |= FT_LOAD_NO_HINTING;
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else
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src->PixelSnapH = true; // FIXME: A bit weird to do this this way.
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if (UserFlags & ImGuiFreeTypeBuilderFlags_NoAutoHint)
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LoadFlags |= FT_LOAD_NO_AUTOHINT;
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if (UserFlags & ImGuiFreeTypeBuilderFlags_ForceAutoHint)
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LoadFlags |= FT_LOAD_FORCE_AUTOHINT;
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if (UserFlags & ImGuiFreeTypeBuilderFlags_LightHinting)
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LoadFlags |= FT_LOAD_TARGET_LIGHT;
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else if (UserFlags & ImGuiFreeTypeBuilderFlags_MonoHinting)
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LoadFlags |= FT_LOAD_TARGET_MONO;
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else
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LoadFlags |= FT_LOAD_TARGET_NORMAL;
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if (UserFlags & ImGuiFreeTypeBuilderFlags_LoadColor)
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LoadFlags |= FT_LOAD_COLOR;
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return true;
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FT_Done_Face(FtFace);
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FtFace = nullptr;
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}
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}
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void ImGui_ImplFreeType_FontSrcData::CloseFont()
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{
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if (FtFace)
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{
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FT_Done_Face(FtFace);
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FtFace = nullptr;
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}
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}
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static const FT_Glyph_Metrics* ImGui_ImplFreeType_LoadGlyph(ImGui_ImplFreeType_FontSrcData* src_data, uint32_t codepoint)
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{
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uint32_t glyph_index = FT_Get_Char_Index(src_data->FtFace, codepoint);
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if (glyph_index == 0)
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return nullptr;
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const FT_Glyph_Metrics* ImGui_ImplFreeType_FontSrcData::LoadGlyph(uint32_t codepoint)
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{
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uint32_t glyph_index = FT_Get_Char_Index(FtFace, codepoint);
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if (glyph_index == 0)
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return nullptr;
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// If this crash for you: FreeType 2.11.0 has a crash bug on some bitmap/colored fonts.
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// - https://gitlab.freedesktop.org/freetype/freetype/-/issues/1076
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// - https://github.com/ocornut/imgui/issues/4567
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// - https://github.com/ocornut/imgui/issues/4566
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// You can use FreeType 2.10, or the patched version of 2.11.0 in VcPkg, or probably any upcoming FreeType version.
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FT_Error error = FT_Load_Glyph(src_data->FtFace, glyph_index, src_data->LoadFlags);
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if (error)
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return nullptr;
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// If this crash for you: FreeType 2.11.0 has a crash bug on some bitmap/colored fonts.
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// - https://gitlab.freedesktop.org/freetype/freetype/-/issues/1076
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// - https://github.com/ocornut/imgui/issues/4567
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// - https://github.com/ocornut/imgui/issues/4566
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// You can use FreeType 2.10, or the patched version of 2.11.0 in VcPkg, or probably any upcoming FreeType version.
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FT_Error error = FT_Load_Glyph(FtFace, glyph_index, LoadFlags);
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if (error)
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return nullptr;
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// Need an outline for this to work
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FT_GlyphSlot slot = FtFace->glyph;
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// Need an outline for this to work
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FT_GlyphSlot slot = src_data->FtFace->glyph;
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#if defined(IMGUI_ENABLE_FREETYPE_LUNASVG) || defined(IMGUI_ENABLE_FREETYPE_PLUTOSVG)
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IM_ASSERT(slot->format == FT_GLYPH_FORMAT_OUTLINE || slot->format == FT_GLYPH_FORMAT_BITMAP || slot->format == FT_GLYPH_FORMAT_SVG);
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IM_ASSERT(slot->format == FT_GLYPH_FORMAT_OUTLINE || slot->format == FT_GLYPH_FORMAT_BITMAP || slot->format == FT_GLYPH_FORMAT_SVG);
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#else
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#if ((FREETYPE_MAJOR >= 2) && (FREETYPE_MINOR >= 12))
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IM_ASSERT(slot->format != FT_GLYPH_FORMAT_SVG && "The font contains SVG glyphs, you'll need to enable IMGUI_ENABLE_FREETYPE_PLUTOSVG or IMGUI_ENABLE_FREETYPE_LUNASVG in imconfig.h and install required libraries in order to use this font");
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IM_ASSERT(slot->format != FT_GLYPH_FORMAT_SVG && "The font contains SVG glyphs, you'll need to enable IMGUI_ENABLE_FREETYPE_PLUTOSVG or IMGUI_ENABLE_FREETYPE_LUNASVG in imconfig.h and install required libraries in order to use this font");
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#endif
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IM_ASSERT(slot->format == FT_GLYPH_FORMAT_OUTLINE || slot->format == FT_GLYPH_FORMAT_BITMAP);
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IM_ASSERT(slot->format == FT_GLYPH_FORMAT_OUTLINE || slot->format == FT_GLYPH_FORMAT_BITMAP);
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#endif // IMGUI_ENABLE_FREETYPE_LUNASVG
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// Apply convenience transform (this is not picking from real "Bold"/"Italic" fonts! Merely applying FreeType helper transform. Oblique == Slanting)
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if (UserFlags & ImGuiFreeTypeBuilderFlags_Bold)
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FT_GlyphSlot_Embolden(slot);
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if (UserFlags & ImGuiFreeTypeBuilderFlags_Oblique)
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{
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FT_GlyphSlot_Oblique(slot);
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//FT_BBox bbox;
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//FT_Outline_Get_BBox(&slot->outline, &bbox);
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//slot->metrics.width = bbox.xMax - bbox.xMin;
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//slot->metrics.height = bbox.yMax - bbox.yMin;
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}
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return &slot->metrics;
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}
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void ImGui_ImplFreeType_FontSrcData::BlitGlyph(const FT_Bitmap* ft_bitmap, uint32_t* dst, uint32_t dst_pitch)
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// Apply convenience transform (this is not picking from real "Bold"/"Italic" fonts! Merely applying FreeType helper transform. Oblique == Slanting)
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if (src_data->UserFlags & ImGuiFreeTypeBuilderFlags_Bold)
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FT_GlyphSlot_Embolden(slot);
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if (src_data->UserFlags & ImGuiFreeTypeBuilderFlags_Oblique)
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{
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IM_ASSERT(ft_bitmap != nullptr);
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const uint32_t w = ft_bitmap->width;
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const uint32_t h = ft_bitmap->rows;
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const uint8_t* src = ft_bitmap->buffer;
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const uint32_t src_pitch = ft_bitmap->pitch;
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switch (ft_bitmap->pixel_mode)
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{
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case FT_PIXEL_MODE_GRAY: // Grayscale image, 1 byte per pixel.
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{
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for (uint32_t y = 0; y < h; y++, src += src_pitch, dst += dst_pitch)
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for (uint32_t x = 0; x < w; x++)
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dst[x] = IM_COL32(255, 255, 255, src[x]);
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break;
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}
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case FT_PIXEL_MODE_MONO: // Monochrome image, 1 bit per pixel. The bits in each byte are ordered from MSB to LSB.
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{
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for (uint32_t y = 0; y < h; y++, src += src_pitch, dst += dst_pitch)
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{
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uint8_t bits = 0;
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const uint8_t* bits_ptr = src;
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for (uint32_t x = 0; x < w; x++, bits <<= 1)
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{
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if ((x & 7) == 0)
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bits = *bits_ptr++;
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dst[x] = IM_COL32(255, 255, 255, (bits & 0x80) ? 255 : 0);
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}
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}
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break;
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}
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case FT_PIXEL_MODE_BGRA:
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{
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// FIXME: Converting pre-multiplied alpha to straight. Doesn't smell good.
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#define DE_MULTIPLY(color, alpha) ImMin((ImU32)(255.0f * (float)color / (float)(alpha + FLT_MIN) + 0.5f), 255u)
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for (uint32_t y = 0; y < h; y++, src += src_pitch, dst += dst_pitch)
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for (uint32_t x = 0; x < w; x++)
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{
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uint8_t r = src[x * 4 + 2], g = src[x * 4 + 1], b = src[x * 4], a = src[x * 4 + 3];
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dst[x] = IM_COL32(DE_MULTIPLY(r, a), DE_MULTIPLY(g, a), DE_MULTIPLY(b, a), a);
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}
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#undef DE_MULTIPLY
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break;
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}
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default:
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IM_ASSERT(0 && "FreeTypeFont::BlitGlyph(): Unknown bitmap pixel mode!");
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}
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FT_GlyphSlot_Oblique(slot);
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//FT_BBox bbox;
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//FT_Outline_Get_BBox(&slot->outline, &bbox);
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//slot->metrics.width = bbox.xMax - bbox.xMin;
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//slot->metrics.height = bbox.yMax - bbox.yMin;
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}
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} // namespace
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return &slot->metrics;
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}
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static void ImGui_ImplFreeType_BlitGlyph(const FT_Bitmap* ft_bitmap, uint32_t* dst, uint32_t dst_pitch)
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{
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IM_ASSERT(ft_bitmap != nullptr);
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const uint32_t w = ft_bitmap->width;
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const uint32_t h = ft_bitmap->rows;
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const uint8_t* src = ft_bitmap->buffer;
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const uint32_t src_pitch = ft_bitmap->pitch;
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switch (ft_bitmap->pixel_mode)
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{
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case FT_PIXEL_MODE_GRAY: // Grayscale image, 1 byte per pixel.
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{
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for (uint32_t y = 0; y < h; y++, src += src_pitch, dst += dst_pitch)
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for (uint32_t x = 0; x < w; x++)
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dst[x] = IM_COL32(255, 255, 255, src[x]);
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break;
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}
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case FT_PIXEL_MODE_MONO: // Monochrome image, 1 bit per pixel. The bits in each byte are ordered from MSB to LSB.
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{
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for (uint32_t y = 0; y < h; y++, src += src_pitch, dst += dst_pitch)
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{
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uint8_t bits = 0;
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const uint8_t* bits_ptr = src;
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for (uint32_t x = 0; x < w; x++, bits <<= 1)
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{
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if ((x & 7) == 0)
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bits = *bits_ptr++;
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dst[x] = IM_COL32(255, 255, 255, (bits & 0x80) ? 255 : 0);
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}
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}
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break;
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}
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case FT_PIXEL_MODE_BGRA:
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{
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// FIXME: Converting pre-multiplied alpha to straight. Doesn't smell good.
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#define DE_MULTIPLY(color, alpha) ImMin((ImU32)(255.0f * (float)color / (float)(alpha + FLT_MIN) + 0.5f), 255u)
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for (uint32_t y = 0; y < h; y++, src += src_pitch, dst += dst_pitch)
|
||||
for (uint32_t x = 0; x < w; x++)
|
||||
{
|
||||
uint8_t r = src[x * 4 + 2], g = src[x * 4 + 1], b = src[x * 4], a = src[x * 4 + 3];
|
||||
dst[x] = IM_COL32(DE_MULTIPLY(r, a), DE_MULTIPLY(g, a), DE_MULTIPLY(b, a), a);
|
||||
}
|
||||
#undef DE_MULTIPLY
|
||||
break;
|
||||
}
|
||||
default:
|
||||
IM_ASSERT(0 && "FreeTypeFont::BlitGlyph(): Unknown bitmap pixel mode!");
|
||||
}
|
||||
}
|
||||
|
||||
// FreeType memory allocation callbacks
|
||||
static void* FreeType_Alloc(FT_Memory /*memory*/, long size)
|
||||
@@ -492,7 +487,7 @@ ImFontGlyph* ImGui_ImplFreeType_FontBakedLoadGlyph(ImFontAtlas* atlas, ImFontCon
|
||||
bd_font_data->BakedLastActivated = baked;
|
||||
}
|
||||
|
||||
const FT_Glyph_Metrics* metrics = bd_font_data->LoadGlyph(codepoint);
|
||||
const FT_Glyph_Metrics* metrics = ImGui_ImplFreeType_LoadGlyph(bd_font_data, codepoint);
|
||||
if (metrics == NULL)
|
||||
return NULL;
|
||||
|
||||
@@ -530,7 +525,7 @@ ImFontGlyph* ImGui_ImplFreeType_FontBakedLoadGlyph(ImFontAtlas* atlas, ImFontCon
|
||||
// Render pixels to our temporary buffer
|
||||
atlas->Builder->TempBuffer.resize(w * h * 4);
|
||||
uint32_t* temp_buffer = (uint32_t*)atlas->Builder->TempBuffer.Data;
|
||||
bd_font_data->BlitGlyph(ft_bitmap, temp_buffer, w);
|
||||
ImGui_ImplFreeType_BlitGlyph(ft_bitmap, temp_buffer, w);
|
||||
|
||||
const float offsets_scale = baked->Size / baked->ContainerFont->Sources[0]->SizePixels;
|
||||
float font_off_x = (src->GlyphOffset.x * offsets_scale);
|
||||
|
||||
Reference in New Issue
Block a user