DrawingBufferBlackBerry.cpp [plain text]
#include "config.h"
#include "DrawingBuffer.h"
#include "GraphicsContext3D.h"
#if USE(ACCELERATED_COMPOSITING)
#include "LayerWebKitThread.h"
#endif
namespace WebCore {
struct DrawingBufferInternal {
unsigned offscreenColorTexture;
#if USE(ACCELERATED_COMPOSITING)
RefPtr<LayerWebKitThread> platformLayer;
#endif
};
static unsigned generateColorTexture(GraphicsContext3D* context, const IntSize& size)
{
unsigned offscreenColorTexture = context->createTexture();
if (!offscreenColorTexture)
return 0;
context->bindTexture(GraphicsContext3D::TEXTURE_2D, offscreenColorTexture);
context->texParameteri(GraphicsContext3D::TEXTURE_2D, GraphicsContext3D::TEXTURE_MAG_FILTER, GraphicsContext3D::NEAREST);
context->texParameteri(GraphicsContext3D::TEXTURE_2D, GraphicsContext3D::TEXTURE_MIN_FILTER, GraphicsContext3D::NEAREST);
context->texParameteri(GraphicsContext3D::TEXTURE_2D, GraphicsContext3D::TEXTURE_WRAP_S, GraphicsContext3D::CLAMP_TO_EDGE);
context->texParameteri(GraphicsContext3D::TEXTURE_2D, GraphicsContext3D::TEXTURE_WRAP_T, GraphicsContext3D::CLAMP_TO_EDGE);
context->texImage2D(GraphicsContext3D::TEXTURE_2D, 0, GraphicsContext3D::RGBA, size.width(), size.height(), 0, GraphicsContext3D::RGBA, GraphicsContext3D::UNSIGNED_BYTE, 0);
context->framebufferTexture2D(GraphicsContext3D::FRAMEBUFFER, GraphicsContext3D::COLOR_ATTACHMENT0, GraphicsContext3D::TEXTURE_2D, offscreenColorTexture, 0);
return offscreenColorTexture;
}
DrawingBuffer::DrawingBuffer(GraphicsContext3D* context, const IntSize& size)
: m_context(context)
, m_size(size)
, m_fbo(context->createFramebuffer())
, m_frontColorBuffer(0)
, m_separateFrontTexture(false)
{
m_internal = adoptPtr(new DrawingBufferInternal);
context->bindFramebuffer(GraphicsContext3D::FRAMEBUFFER, m_fbo);
m_internal->offscreenColorTexture = generateColorTexture(context, size);
}
DrawingBuffer::~DrawingBuffer()
{
if (!m_context)
return;
m_context->bindFramebuffer(GraphicsContext3D::FRAMEBUFFER, m_fbo);
m_context->deleteTexture(m_internal->offscreenColorTexture);
clear();
}
bool DrawingBuffer::reset(const IntSize& newSize)
{
if (!m_context)
return false;
if (m_size == newSize)
return false;
m_size = newSize;
m_context->bindTexture(GraphicsContext3D::TEXTURE_2D, m_internal->offscreenColorTexture);
m_context->texImage2D(GraphicsContext3D::TEXTURE_2D, 0, GraphicsContext3D::RGBA, m_size.width(), m_size.height(), 0, GraphicsContext3D::RGBA, GraphicsContext3D::UNSIGNED_BYTE, 0);
return true;
}
#if USE(ACCELERATED_COMPOSITING)
PlatformLayer* DrawingBuffer::platformLayer()
{
return m_internal->platformLayer.get();
}
void DrawingBuffer::prepareBackBuffer()
{
}
bool DrawingBuffer::requiresCopyFromBackToFrontBuffer() const
{
return false;
}
unsigned DrawingBuffer::frontColorBuffer() const
{
return colorBuffer();
}
#endif
}