mirrors/ladybird
0
0
Fork 0
mirror of https://github.com/LadybirdBrowser/ladybird.git synced 2025-08-22 18:31:13 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions 9

LibGfx/JPEG+CMYKBitmap: Extract the CMYK to RGB conversion code

Browse source 
Right now, the JPEG decoder is the only one supporting CMYK, but that
won't last for long. So, let's move the conversion to CMYKBitmap.
This commit is contained in:
Lucas CHOLLET 2024-01-18 16:59:42 -05:00 • committed by Andrew Kaster
commit 09b2b3539b
Notes: sideshowbarker 2024-07-16 20:08:14 +09:00
3 changed files with 23 additions and 19 deletions
Download patch file Download diff file Expand all files Collapse all files

20
Userland/Libraries/LibGfx/ImageFormats/JPEGLoader.cpp
View file

@ -1694,24 +1694,6 @@ static void invert_colors_for_adobe_images(JPEGLoadingContext const& context, Ve
}
}
static ErrorOr<void> cmyk_to_rgb(JPEGLoadingContext& context)
{
VERIFY(context.cmyk_bitmap);
VERIFY(!context.bitmap);
context.bitmap = TRY(Bitmap::create(BitmapFormat::BGRx8888, { context.frame.width, context.frame.height }));
for (int y = 0; y < context.frame.height; ++y) {
for (int x = 0; x < context.frame.width; ++x) {
auto const& cmyk = context.cmyk_bitmap->scanline(y)[x];
u8 k = 255 - cmyk.k;
context.bitmap->scanline(y)[x] = Color((255 - cmyk.c) * k / 255, (255 - cmyk.m) * k / 255, (255 - cmyk.y) * k / 255).value();
}
}
return {};
}
static void ycck_to_cmyk(Vector<Macroblock>& macroblocks)
{
// 7 - Conversions between colour encodings
@ -2026,7 +2008,7 @@ ErrorOr<ImageFrameDescriptor> JPEGImageDecoderPlugin::frame(size_t index, Option
}
if (m_context->cmyk_bitmap && !m_context->bitmap)
TRY(cmyk_to_rgb(*m_context));
return ImageFrameDescriptor { TRY(m_context->cmyk_bitmap->to_low_quality_rgb()), 0 };
return ImageFrameDescriptor { m_context->bitmap, 0 };
}