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/*
* Copyright (C) 2010 codeaurora.org All rights reserved.
* Copyright (C) 2011 Collabora Ltd.
* Copyright (C) 2011 Samsung Electronics
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * 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 ``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 OWNER 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 "TileCairo.h"
#if USE(TILED_BACKING_STORE) && USE(CAIRO)
#include "CairoUtilities.h"
#include "GraphicsContext.h"
#include "PlatformContextCairo.h"
#include "TiledBackingStore.h"
#include "TiledBackingStoreClient.h"
#include <RefPtrCairo.h>
namespace WebCore {
TileCairo::TileCairo(TiledBackingStore* backingStore, const Coordinate& tileCoordinate)
: m_backingStore(backingStore)
, m_coordinate(tileCoordinate)
, m_rect(m_backingStore->tileRectForCoordinate(tileCoordinate))
{
cairo_rectangle_int_t rect = m_rect;
m_dirtyRegion = adoptRef(cairo_region_create_rectangle(&rect));
}
TileCairo::~TileCairo()
{
}
bool TileCairo::isDirty() const
{
return !cairo_region_is_empty(m_dirtyRegion.get());
}
bool TileCairo::isReadyToPaint() const
{
return m_buffer;
}
void TileCairo::invalidate(const IntRect& dirtyRect)
{
IntRect tileDirtyRect = intersection(dirtyRect, m_rect);
if (tileDirtyRect.isEmpty())
return;
cairo_rectangle_int_t rect = tileDirtyRect;
cairo_region_union_rectangle(m_dirtyRegion.get(), &rect);
}
Vector<IntRect> TileCairo::updateBackBuffer()
{
if (m_buffer && !isDirty())
return Vector<IntRect>();
if (!m_buffer)
m_buffer = adoptRef(cairo_image_surface_create(CAIRO_FORMAT_ARGB32,
m_backingStore->tileSize().width(),
m_backingStore->tileSize().height()));
RefPtr<cairo_t> cr = adoptRef(cairo_create(m_buffer.get()));
GraphicsContext context(cr.get());
context.translate(-m_rect.x(), -m_rect.y());
Vector<IntRect> updateRects;
cairo_rectangle_int_t rect;
int rectCount = cairo_region_num_rectangles(m_dirtyRegion.get());
for (int i = 0; i < rectCount; ++i) {
cairo_region_get_rectangle(m_dirtyRegion.get(), i, &rect);
updateRects.append(IntRect(rect));
context.save();
context.clip(FloatRect(rect));
context.scale(FloatSize(m_backingStore->contentsScale(), m_backingStore->contentsScale()));
m_backingStore->client()->tiledBackingStorePaint(&context, m_backingStore->mapToContents(rect));
context.restore();
}
m_dirtyRegion.clear();
m_dirtyRegion = adoptRef(cairo_region_create());
return updateRects;
}
void TileCairo::swapBackBufferToFront()
{
}
void TileCairo::paint(GraphicsContext* context, const IntRect& rect)
{
if (!m_buffer)
return;
IntRect target = intersection(rect, m_rect);
cairo_t* cr = context->platformContext()->cr();
cairo_set_source_surface(cr, m_buffer.get(), m_rect.x(), m_rect.y());
cairo_rectangle(cr, target.x(), target.y(), target.width(), target.height());
cairo_fill(cr);
}
void TileCairo::resize(const WebCore::IntSize& newSize)
{
IntRect oldRect = m_rect;
m_rect = IntRect(m_rect.location(), newSize);
if (m_rect.maxX() > oldRect.maxX())
invalidate(IntRect(oldRect.maxX(), oldRect.y(), m_rect.maxX() - oldRect.maxX(), m_rect.height()));
if (m_rect.maxY() > oldRect.maxY())
invalidate(IntRect(oldRect.x(), oldRect.maxY(), m_rect.width(), m_rect.maxY() - oldRect.maxY()));
}
}
#endif
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