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42 lines
1.3 KiB
C++
42 lines
1.3 KiB
C++
/*
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* Copyright (c) 2024, Nico Weber <thakis@chromium.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <AK/Checked.h>
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#include <LibGfx/CMYKBitmap.h>
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namespace Gfx {
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ErrorOr<NonnullRefPtr<CMYKBitmap>> CMYKBitmap::create_with_size(IntSize const& size)
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{
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VERIFY(size.width() >= 0 && size.height() >= 0);
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Checked<int> final_size { size.width() };
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final_size.mul(size.height());
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final_size.mul(sizeof(CMYK));
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if (final_size.has_overflow())
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return Error::from_string_literal("Image dimensions cause an integer overflow");
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auto data = TRY(ByteBuffer::create_uninitialized(final_size.value()));
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return adopt_ref(*new CMYKBitmap(size, move(data)));
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}
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ErrorOr<RefPtr<Bitmap>> CMYKBitmap::to_low_quality_rgb() const
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{
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if (!m_rgb_bitmap) {
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m_rgb_bitmap = TRY(Bitmap::create(BitmapFormat::BGRx8888, { m_size.width(), m_size.height() }));
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for (int y = 0; y < m_size.height(); ++y) {
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for (int x = 0; x < m_size.width(); ++x) {
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auto const& cmyk = scanline(y)[x];
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u8 k = 255 - cmyk.k;
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m_rgb_bitmap->scanline(y)[x] = Color((255 - cmyk.c) * k / 255, (255 - cmyk.m) * k / 255, (255 - cmyk.y) * k / 255).value();
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}
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}
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}
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return m_rgb_bitmap;
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}
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}
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