BackingStoreTile.cpp [plain text]
#include "config.h"
#include "BackingStoreTile.h"
#include "GraphicsContext.h"
#include "SurfacePool.h"
#include <BlackBerryPlatformGraphics.h>
namespace BlackBerry {
namespace WebKit {
TileBuffer::TileBuffer(const Platform::IntSize& size)
: m_size(size)
, m_buffer(0)
, m_blitGeneration(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() const
{
return isRendered(rect());
}
bool TileBuffer::isRendered(const Platform::IntRectRegion& contents) const
{
return 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;
}
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;
unsigned front = reinterpret_cast<unsigned>(frontBuffer());
unsigned back = reinterpret_cast<unsigned>(backBuffer());
_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);
}
}
}