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libpng: interlaced support

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Vinicius Rangel 2024-11-22 04:14:00 -03:00 committed by georgemoralis
parent 3f0e4f3718
commit 7a3827395c
1 changed files with 8 additions and 5 deletions
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9
src/core/libraries/libpng/pngdec.cpp
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@ -158,18 +158,21 @@ s32 PS4_SYSV_ABI scePngDecDecode(OrbisPngDecHandle handle, const OrbisPngDecDeco
color_type == PNG_COLOR_TYPE_PALETTE) color_type == PNG_COLOR_TYPE_PALETTE)
png_set_add_alpha(pngh->png_ptr, param->alphaValue, PNG_FILLER_AFTER); png_set_add_alpha(pngh->png_ptr, param->alphaValue, PNG_FILLER_AFTER);
int pass = png_set_interlace_handling(pngh->png_ptr);
png_read_update_info(pngh->png_ptr, pngh->info_ptr); png_read_update_info(pngh->png_ptr, pngh->info_ptr);
auto ptr = (png_bytep)param->imageMemAddr;
auto const numChannels = png_get_channels(pngh->png_ptr, pngh->info_ptr); auto const numChannels = png_get_channels(pngh->png_ptr, pngh->info_ptr);
auto horizontal_bytes = numChannels * width; auto horizontal_bytes = numChannels * width;
int stride = param->imagePitch > 0 ? param->imagePitch : horizontal_bytes; int stride = param->imagePitch > 0 ? param->imagePitch : horizontal_bytes;
for (int j = 0; j < pass; j++) { // interlaced
auto ptr = (png_bytep)param->imageMemAddr;
for (int y = 0; y < height; y++) { for (int y = 0; y < height; y++) {
png_read_row(pngh->png_ptr, ptr, NULL); png_read_row(pngh->png_ptr, ptr, nullptr);
ptr += stride; ptr += stride;
} }
}
return (width > 32767 || height > 32767) ? 0 : (width << 16) | height; return (width > 32767 || height > 32767) ? 0 : (width << 16) | height;
} }