ladybird/Libraries/LibGfx/CMYKBitmap.cpp
Jelle Raaijmakers 2687246808
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LibGfx: Use NonnullRefPtr<Bitmap> for frame descriptors
This makes it a bit easier to reason about where bitmaps should be
available.
2025-06-25 22:54:48 +12:00

41 lines
1.2 KiB
C++

/*
* Copyright (c) 2024, Nico Weber <thakis@chromium.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <AK/Checked.h>
#include <LibGfx/CMYKBitmap.h>
namespace Gfx {
ErrorOr<NonnullRefPtr<CMYKBitmap>> CMYKBitmap::create_with_size(IntSize const& size)
{
VERIFY(size.width() >= 0 && size.height() >= 0);
Checked<int> final_size { size.width() };
final_size.mul(size.height());
final_size.mul(sizeof(CMYK));
if (final_size.has_overflow())
return Error::from_string_literal("Image dimensions cause an integer overflow");
auto data = TRY(ByteBuffer::create_uninitialized(final_size.value()));
return adopt_ref(*new CMYKBitmap(size, move(data)));
}
ErrorOr<NonnullRefPtr<Bitmap>> CMYKBitmap::to_low_quality_rgb() const
{
if (!m_rgb_bitmap) {
m_rgb_bitmap = TRY(Bitmap::create(BitmapFormat::BGRx8888, m_size));
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;
}
}