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png: fix gray pix formats

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This commit is contained in:
Maximilian Seidler 2025-09-10 18:19:29 +02:00
parent 621e2e00f1
commit 4c2e424933
1 changed files with 2 additions and 2 deletions
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4
src/image/formats/Png.cpp
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@ -86,13 +86,13 @@ static std::expected<cairo_surface_t*, std::string> loadPNG(png_structp png, png
png_set_palette_to_rgb(png);
if (COLOR_TYPE == PNG_COLOR_TYPE_GRAY && BPP < 8)
png_set_expand_gray_1_2_4_to_8(png);
if (COLOR_TYPE == PNG_COLOR_TYPE_GRAY || COLOR_TYPE == PNG_COLOR_TYPE_GRAY_ALPHA)
png_set_gray_to_rgb(png);
if (png_get_valid(png, info, PNG_INFO_tRNS))
png_set_tRNS_to_alpha(png);
if (COLOR_TYPE == PNG_COLOR_TYPE_RGB || COLOR_TYPE == PNG_COLOR_TYPE_GRAY || COLOR_TYPE == PNG_COLOR_TYPE_PALETTE)
png_set_filler(png, 0xFF, PNG_FILLER_AFTER);
else if (COLOR_TYPE == PNG_COLOR_TYPE_GRAY_ALPHA)
png_set_gray_to_rgb(png);
png_read_update_info(png, info);