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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 "CairoPaintingContext.h"
#if USE(CAIRO)
#include "CairoOperationRecorder.h"
#include "CoordinatedTileBuffer.h"
#include "GraphicsContext.h"
#include "GraphicsContextCairo.h"
#include <cairo.h>
#include <utility>
#include <wtf/TZoneMallocInlines.h>
namespace WebCore {
namespace Cairo {
WTF_MAKE_TZONE_ALLOCATED_IMPL(PaintingContext);
std::unique_ptr<PaintingContext> PaintingContext::createForPainting(WebCore::CoordinatedTileBuffer& buffer)
{
return std::unique_ptr<PaintingContext>(new PaintingContext(buffer));
}
std::unique_ptr<PaintingContext> PaintingContext::createForRecording(PaintingOperations& paintingOperations)
{
return std::unique_ptr<PaintingContext>(new PaintingContext(paintingOperations));
}
PaintingContext::PaintingContext(WebCore::CoordinatedTileBuffer& baseBuffer)
{
// All buffers used for painting with Cairo are unaccelerated.
auto& buffer = static_cast<WebCore::CoordinatedUnacceleratedTileBuffer&>(baseBuffer);
// 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, baseBuffer.size().width(), baseBuffer.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<WebCore::CoordinatedTileBuffer*, PaintingContext*> { &buffer, this }, [](void* data) {
auto* userData = static_cast<std::pair<WebCore::CoordinatedTileBuffer*, PaintingContext*>*>(data);
// Deref the CoordinatedTileBuffer 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());
}
PaintingContext::PaintingContext(PaintingOperations& paintingOperations)
: m_graphicsContext(makeUnique<OperationRecorder>(paintingOperations))
{
}
PaintingContext::~PaintingContext()
{
if (!m_surface)
return;
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);
}
void PaintingContext::replay(const PaintingOperations& paintingOperations)
{
ASSERT(m_surface);
auto& context = *m_graphicsContext->platformContext();
for (auto& operation : paintingOperations)
operation->execute(context);
}
} // namespace Cairo
} // namespace WebCore
#endif // USE(CAIRO)
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