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imgui_freetype: fixed undefined float to integer conversion when de-multiplying a color glyph with a color above its alpha. (#9599)

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Miloš Đorđević 2026-11-02 14:27:23 +01:00 committed by GitHub
parent 391f714c37
commit 7ee4dbac89
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misc/freetype/imgui_freetype.cpp
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@ -295,7 +295,7 @@ static void ImGui_ImplFreeType_BlitGlyph(const FT_Bitmap* ft_bitmap, uint32_t* d
case FT_PIXEL_MODE_BGRA: case FT_PIXEL_MODE_BGRA:
{ {
// FIXME: Converting pre-multiplied alpha to straight. Doesn't smell good. // FIXME: Converting pre-multiplied alpha to straight. Doesn't smell good.
#define DE_MULTIPLY(color, alpha) ImMin((ImU32)(255.0f * (float)color / (float)(alpha + FLT_MIN) + 0.5f), 255u) #define DE_MULTIPLY(color, alpha) (ImU32)ImMin(255.0f * (float)color / (float)(alpha + FLT_MIN) + 0.5f, 255.0f)
for (uint32_t y = 0; y < h; y++, src += src_pitch, dst += dst_pitch) for (uint32_t y = 0; y < h; y++, src += src_pitch, dst += dst_pitch)
for (uint32_t x = 0; x < w; x++) for (uint32_t x = 0; x < w; x++)
{ {