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Document/workaround an issue using IMGUI_DISABLE_STB_TRUETYPE_IMPLEMENTATION since 1.92.0. (#8794)

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ocornut 2025-07-23 16:30:30 +09:00
parent 174f37bdaf
commit b884533957
3 changed files with 17 additions and 3 deletions
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9
imgui_draw.cpp
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@ -4622,6 +4622,15 @@ static bool ImGui_ImplStbTrueType_FontBakedInit(ImFontAtlas* atlas, ImFontConfig
return true;
}
// Since 1.92.0 (June 2025) we rely on those 3 functions which are implemented inside stb_truetype.h and require STB_TRUETYPE_IMPLEMENTATION.
// Using IMGUI_DISABLE_STB_TRUETYPE_IMPLEMENTATION became broken, see https://github.com/ocornut/imgui/issues/8794
// One way to fix is to remove the 'static' keywords for those 3 functions in your copy of stb_truetype.h
#ifdef IMGUI_DISABLE_STB_TRUETYPE_IMPLEMENTATION
extern void stbtt__h_prefilter(unsigned char* pixels, int w, int h, int stride_in_bytes, unsigned int kernel_width);
extern void stbtt__v_prefilter(unsigned char* pixels, int w, int h, int stride_in_bytes, unsigned int kernel_width);
extern float stbtt__oversample_shift(int oversample);
#endif
static bool ImGui_ImplStbTrueType_FontBakedLoadGlyph(ImFontAtlas* atlas, ImFontConfig* src, ImFontBaked* baked, void*, ImWchar codepoint, ImFontGlyph* out_glyph, float* out_advance_x)
{
// Search for first font which has the glyph