void DrawingBuffer::paintCompositedResultsToCanvas(ImageBuffer* imageBuffer)
{
if (!m_context || !m_context->makeContextCurrent() || m_context->getGraphicsResetStatusARB() != GL_NO_ERROR)
return;
if (!imageBuffer)
return;
Platform3DObject tex = imageBuffer->getBackingTexture();
if (tex) {
m_context->copyTextureCHROMIUM(GL_TEXTURE_2D, m_frontColorBuffer,
tex, 0, GL_RGBA, GL_UNSIGNED_BYTE);
return;
}
// Since the m_frontColorBuffer was produced and sent to the compositor, it cannot be bound to an fbo.
// We have to make a copy of it here and bind that copy instead.
// FIXME: That's not true any more, provided we don't change texture
// parameters.
unsigned sourceTexture = createColorTexture(m_size);
m_context->copyTextureCHROMIUM(GL_TEXTURE_2D, m_frontColorBuffer, sourceTexture, 0, GL_RGBA, GL_UNSIGNED_BYTE);
// Since we're using the same context as WebGL, we have to restore any state we change (in this case, just the framebuffer binding).
// FIXME: The WebGLRenderingContext tracks the current framebuffer binding, it would be slightly more efficient to use this value
// rather than querying it off of the context.
GLint previousFramebuffer = 0;
m_context->getIntegerv(GL_FRAMEBUFFER_BINDING, &previousFramebuffer);
Platform3DObject framebuffer = m_context->createFramebuffer();
m_context->bindFramebuffer(GL_FRAMEBUFFER, framebuffer);
m_context->framebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, sourceTexture, 0);
paintFramebufferToCanvas(framebuffer, size().width(), size().height(), !m_attributes.premultipliedAlpha, imageBuffer);
m_context->deleteFramebuffer(framebuffer);
m_context->deleteTexture(sourceTexture);
m_context->bindFramebuffer(GL_FRAMEBUFFER, previousFramebuffer);
}
void DrawingBuffer::paintRenderingResultsToCanvas(ImageBuffer* imageBuffer)
{
paintFramebufferToCanvas(framebuffer(), size().width(), size().height(), !m_attributes.premultipliedAlpha, imageBuffer);
}
void GraphicsContext3DPrivate::paintRenderingResultsToCanvas(CanvasRenderingContext* context)
{
ImageBuffer* imageBuffer = context->canvas()->buffer();
paintFramebufferToCanvas(0, m_impl->width(), m_impl->height(), !m_impl->getContextAttributes().premultipliedAlpha, imageBuffer);
}
