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/*
* Copyright (C) 2006 Nikolas Zimmermann <zimmermann@kde.org>
* Copyright (C) 2007 Holger Hans Peter Freyther <zecke@selfish.org>
* Copyright (C) 2008, 2009 Dirk Schulze <krit@webkit.org>
* Copyright (C) 2010 Torch Mobile (Beijing) Co. Ltd. All rights reserved.
* Copyright (C) 2020-2021 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "ImageBufferCairoImageSurfaceBackend.h"
#if USE(CAIRO)
#include "Color.h"
#include "ImageBackingStore.h"
#include <cairo.h>
#include <wtf/IsoMallocInlines.h>
namespace WebCore {
WTF_MAKE_ISO_ALLOCATED_IMPL(ImageBufferCairoImageSurfaceBackend);
IntSize ImageBufferCairoImageSurfaceBackend::calculateSafeBackendSize(const Parameters& parameters)
{
IntSize backendSize = calculateBackendSize(parameters);
if (backendSize.isEmpty())
return { };
if (backendSize.width() > cairoMaxImageSize || backendSize.height() > cairoMaxImageSize)
return { };
int stride = cairo_format_stride_for_width(CAIRO_FORMAT_ARGB32, backendSize.width());
if (stride == -1)
return { };
CheckedSize bytes = CheckedUint32(backendSize.height()) * stride;
if (bytes.hasOverflowed())
return { };
return backendSize;
}
unsigned ImageBufferCairoImageSurfaceBackend::calculateBytesPerRow(const IntSize& backendSize)
{
ASSERT(!backendSize.isEmpty());
return cairo_format_stride_for_width(CAIRO_FORMAT_ARGB32, backendSize.width());
}
size_t ImageBufferCairoImageSurfaceBackend::calculateMemoryCost(const Parameters& parameters)
{
IntSize backendSize = calculateBackendSize(parameters);
return ImageBufferBackend::calculateMemoryCost(backendSize, calculateBytesPerRow(backendSize));
}
std::unique_ptr<ImageBufferCairoImageSurfaceBackend> ImageBufferCairoImageSurfaceBackend::create(const Parameters& parameters, const ImageBufferCreationContext&)
{
ASSERT(parameters.pixelFormat == PixelFormat::BGRA8);
static cairo_user_data_key_t s_surfaceDataKey;
IntSize backendSize = calculateSafeBackendSize(parameters);
if (backendSize.isEmpty())
return nullptr;
int stride = cairo_format_stride_for_width(CAIRO_FORMAT_ARGB32, backendSize.width());
void* surfaceData;
if (!tryFastCalloc(backendSize.height(), stride).getValue(surfaceData))
return nullptr;
auto surface = adoptRef(cairo_image_surface_create_for_data(static_cast<unsigned char*>(surfaceData), CAIRO_FORMAT_ARGB32, backendSize.width(), backendSize.height(), stride));
cairo_surface_set_user_data(surface.get(), &s_surfaceDataKey, surfaceData, [](void* data) {
fastFree(data);
});
if (cairo_surface_status(surface.get()) != CAIRO_STATUS_SUCCESS)
return nullptr;
return std::unique_ptr<ImageBufferCairoImageSurfaceBackend>(new ImageBufferCairoImageSurfaceBackend(parameters, WTFMove(surface)));
}
std::unique_ptr<ImageBufferCairoImageSurfaceBackend> ImageBufferCairoImageSurfaceBackend::create(const Parameters& parameters, const GraphicsContext&)
{
return ImageBufferCairoImageSurfaceBackend::create(parameters, nullptr);
}
ImageBufferCairoImageSurfaceBackend::ImageBufferCairoImageSurfaceBackend(const Parameters& parameters, RefPtr<cairo_surface_t>&& surface)
: ImageBufferCairoSurfaceBackend(parameters, WTFMove(surface))
{
ASSERT(cairo_surface_get_type(m_surface.get()) == CAIRO_SURFACE_TYPE_IMAGE);
}
unsigned ImageBufferCairoImageSurfaceBackend::bytesPerRow() const
{
IntSize backendSize = calculateBackendSize(m_parameters);
return calculateBytesPerRow(backendSize);
}
void ImageBufferCairoImageSurfaceBackend::platformTransformColorSpace(const std::array<uint8_t, 256>& lookUpTable)
{
unsigned char* dataSrc = cairo_image_surface_get_data(m_surface.get());
int stride = cairo_image_surface_get_stride(m_surface.get());
for (int y = 0; y < logicalSize().height(); ++y) {
unsigned* row = reinterpret_cast_ptr<unsigned*>(dataSrc + stride * y);
for (int x = 0; x < logicalSize().width(); x++) {
unsigned* pixel = row + x;
auto pixelComponents = unpremultiplied(asSRGBA(PackedColor::ARGB { *pixel })).resolved();
auto transformedPixelComponents = SRGBA<uint8_t> { lookUpTable[pixelComponents.red], lookUpTable[pixelComponents.green], lookUpTable[pixelComponents.blue], pixelComponents.alpha };
*pixel = PackedColor::ARGB { premultipliedCeiling(transformedPixelComponents) }.value;
}
}
cairo_surface_mark_dirty_rectangle(m_surface.get(), 0, 0, logicalSize().width(), logicalSize().height());
}
} // namespace WebCore
#endif // USE(CAIRO)
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