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ImDrawList: Fix texture-based anti-aliasing with RGBA textures (#5132, #3245)

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When using an Alpha8 font texture, GetTexDataAsRGBA32 converts 0x00 to transparent white.
When using a RGBA32 font texture, ImFontAtlasBuildRenderLinesTexData was writing transparent black.
This commit is contained in:
cfillion
2022-03-22 20:24:38 -04:00
committed by ocornut
parent 3c07879504
commit 7d7bf993bb
2 changed files with 3 additions and 2 deletions
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4
imgui_draw.cpp
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@ -2738,13 +2738,13 @@ static void ImFontAtlasBuildRenderLinesTexData(ImFontAtlas* atlas)
{
unsigned int* write_ptr = &atlas->TexPixelsRGBA32[r->X + ((r->Y + y) * atlas->TexWidth)];
for (unsigned int i = 0; i < pad_left; i++)
*(write_ptr + i) = IM_COL32_BLACK_TRANS;
*(write_ptr + i) = IM_COL32(255, 255, 255, 0);
for (unsigned int i = 0; i < line_width; i++)
*(write_ptr + pad_left + i) = IM_COL32_WHITE;
for (unsigned int i = 0; i < pad_right; i++)
*(write_ptr + pad_left + line_width + i) = IM_COL32_BLACK_TRANS;
*(write_ptr + pad_left + line_width + i) = IM_COL32(255, 255, 255, 0);
}
// Calculate UVs for this line