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/*
* Copyright (C) 2009, 2010, 2011, 2012 Research In Motion Limited. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "config.h"
#include "BackingStoreTile.h"
#include "GraphicsContext.h"
#include "SurfacePool.h"
#include <BlackBerryPlatformGraphics.h>
namespace BlackBerry {
namespace WebKit {
Fence::~Fence()
{
if (m_platformSync)
SurfacePool::globalSurfacePool()->destroyPlatformSync(m_platformSync);
}
TileBuffer::TileBuffer(const Platform::IntSize& size)
: m_size(size)
, m_fence(Fence::create())
, m_buffer(0)
, m_scale(1.0)
{
}
TileBuffer::~TileBuffer()
{
destroyBuffer(m_buffer);
}
Platform::IntSize TileBuffer::size() const
{
return m_size;
}
Platform::IntRect TileBuffer::rect() const
{
return Platform::IntRect(Platform::IntPoint::zero(), m_size);
}
bool TileBuffer::isRendered(double scale) const
{
return isRendered(rect(), scale);
}
bool TileBuffer::isRendered(const Platform::IntRectRegion& contents, double scale) const
{
return m_scale == scale && Platform::IntRectRegion::subtractRegions(contents, m_renderedRegion).isEmpty();
}
void TileBuffer::clearRenderedRegion(const Platform::IntRectRegion& region)
{
m_renderedRegion = Platform::IntRectRegion::subtractRegions(m_renderedRegion, region);
}
void TileBuffer::clearRenderedRegion()
{
m_renderedRegion = Platform::IntRectRegion();
}
void TileBuffer::addRenderedRegion(const Platform::IntRectRegion& region)
{
m_renderedRegion = Platform::IntRectRegion::unionRegions(region, m_renderedRegion);
}
Platform::IntRectRegion TileBuffer::renderedRegion() const
{
return m_renderedRegion;
}
Platform::IntRectRegion TileBuffer::notRenderedRegion() const
{
return Platform::IntRectRegion::subtractRegions(rect(), renderedRegion());
}
Platform::Graphics::Buffer* TileBuffer::nativeBuffer() const
{
if (!m_buffer)
m_buffer = createBuffer(m_size, Platform::Graphics::TileBuffer, SurfacePool::globalSurfacePool()->sharedPixmapGroup());
return m_buffer;
}
bool TileBuffer::wasNativeBufferCreated() const
{
return static_cast<bool>(m_buffer);
}
BackingStoreTile::BackingStoreTile(const Platform::IntSize& size, BufferingMode mode)
: m_bufferingMode(mode)
, m_committed(false)
, m_backgroundPainted(false)
, m_horizontalShift(0)
, m_verticalShift(0)
{
m_frontBuffer = new TileBuffer(size);
}
BackingStoreTile::~BackingStoreTile()
{
delete m_frontBuffer;
m_frontBuffer = 0;
}
Platform::IntSize BackingStoreTile::size() const
{
return frontBuffer()->size();
}
Platform::IntRect BackingStoreTile::rect() const
{
return frontBuffer()->rect();
}
TileBuffer* BackingStoreTile::frontBuffer() const
{
ASSERT(m_frontBuffer);
return m_frontBuffer;
}
TileBuffer* BackingStoreTile::backBuffer() const
{
if (m_bufferingMode == SingleBuffered)
return frontBuffer();
return SurfacePool::globalSurfacePool()->backBuffer();
}
void BackingStoreTile::swapBuffers()
{
if (m_bufferingMode == SingleBuffered)
return;
// Store temps.
unsigned front = reinterpret_cast<unsigned>(frontBuffer());
unsigned back = reinterpret_cast<unsigned>(backBuffer());
// Atomic change.
_smp_xchg(reinterpret_cast<unsigned*>(&m_frontBuffer), back);
_smp_xchg(reinterpret_cast<unsigned*>(&SurfacePool::globalSurfacePool()->m_backBuffer), front);
}
void BackingStoreTile::reset()
{
setCommitted(false);
frontBuffer()->clearRenderedRegion();
backBuffer()->clearRenderedRegion();
clearShift();
}
void BackingStoreTile::paintBackground()
{
m_backgroundPainted = true;
clearBuffer(backBuffer()->nativeBuffer(), 0, 0, 0, 0);
}
}
}
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