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/*
* Copyright (C) 2017 Metrological Group B.V.
* Copyright (C) 2017 Igalia S.L.
*
* 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 THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "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 THE COPYRIGHT
* HOLDER 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 "NicosiaPaintingContextCairo.h"
#if USE(CAIRO)
#include "GraphicsContext.h"
#include "GraphicsContextCairo.h"
#include "NicosiaBuffer.h"
#include "NicosiaCairoOperationRecorder.h"
#include "NicosiaPaintingOperationReplayCairo.h"
#include "RefPtrCairo.h"
#include <cairo.h>
#include <utility>
namespace Nicosia {
PaintingContextCairo::ForPainting::ForPainting(Buffer& buffer)
{
// Balanced by the deref in the s_bufferKey user data destroy callback.
buffer.ref();
m_surface = adoptRef(cairo_image_surface_create_for_data(buffer.data(),
CAIRO_FORMAT_ARGB32, buffer.size().width(), buffer.size().height(), buffer.stride()));
static cairo_user_data_key_t s_bufferKey;
cairo_surface_set_user_data(m_surface.get(), &s_bufferKey,
new std::pair<Buffer*, ForPainting*> { &buffer, this },
[](void* data)
{
auto* userData = static_cast<std::pair<Buffer*, ForPainting*>*>(data);
// Deref the Buffer object.
userData->first->deref();
#if ASSERT_ENABLED
// Mark the deletion of the cairo_surface_t object associated with this
// PaintingContextCairo as complete. This way we check that the cairo_surface_t
// object doesn't outlive the PaintingContextCairo through which it was used.
userData->second->m_deletionComplete = true;
#endif
delete userData;
});
m_graphicsContext = makeUnique<WebCore::GraphicsContextCairo>(m_surface.get());
}
PaintingContextCairo::ForPainting::~ForPainting()
{
cairo_surface_flush(m_surface.get());
m_graphicsContext = nullptr;
m_surface = nullptr;
// With all the Cairo references purged, the cairo_surface_t object should be destroyed
// as well. This is checked by asserting that m_deletionComplete is true, which should
// be the case if the s_bufferKey user data destroy callback has been invoked upon the
// cairo_surface_t destruction.
ASSERT(m_deletionComplete);
}
WebCore::GraphicsContext& PaintingContextCairo::ForPainting::graphicsContext()
{
return *m_graphicsContext;
}
void PaintingContextCairo::ForPainting::replay(const PaintingOperations& paintingOperations)
{
PaintingOperationReplayCairo operationReplay { *m_graphicsContext->platformContext() };
for (auto& operation : paintingOperations)
operation->execute(operationReplay);
}
PaintingContextCairo::ForRecording::ForRecording(PaintingOperations& paintingOperations)
{
m_graphicsContext = makeUnique<CairoOperationRecorder>(paintingOperations);
}
PaintingContextCairo::ForRecording::~ForRecording() = default;
WebCore::GraphicsContext& PaintingContextCairo::ForRecording::graphicsContext()
{
return *m_graphicsContext;
}
void PaintingContextCairo::ForRecording::replay(const PaintingOperations&)
{
ASSERT_NOT_REACHED();
}
} // namespace Nicosia
#endif // USE(CAIRO)
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