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

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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
parent 0462858247
commit 09b2b3539b
3 changed files with 23 additions and 19 deletions
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17
Userland/Libraries/LibGfx/CMYKBitmap.cpp
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@ -15,4 +15,21 @@ ErrorOr<NonnullRefPtr<CMYKBitmap>> CMYKBitmap::create_with_size(IntSize const& s
return adopt_ref(*new CMYKBitmap(size, move(data)));
}
ErrorOr<RefPtr<Bitmap>> CMYKBitmap::to_low_quality_rgb() const
{
if (!m_rgb_bitmap) {
m_rgb_bitmap = TRY(Bitmap::create(BitmapFormat::BGRx8888, { m_size.width(), m_size.height() }));
for (int y = 0; y < m_size.height(); ++y) {
for (int x = 0; x < m_size.width(); ++x) {
auto const& cmyk = scanline(y)[x];
u8 k = 255 - cmyk.k;
m_rgb_bitmap->scanline(y)[x] = Color((255 - cmyk.c) * k / 255, (255 - cmyk.m) * k / 255, (255 - cmyk.y) * k / 255).value();
}
}
}
return m_rgb_bitmap;
}
}