void GraphicsContext3D::paintRenderingResultsToCanvas(ImageBuffer* imageBuffer, DrawingBuffer*)
{
int rowBytes = m_currentWidth * 4;
int totalBytes = rowBytes * m_currentHeight;
OwnArrayPtr<unsigned char> pixels = adoptArrayPtr(new unsigned char[totalBytes]);
if (!pixels)
return;
readRenderingResults(pixels.get(), totalBytes);
if (!m_attrs.premultipliedAlpha) {
for (int i = 0; i < totalBytes; i += 4) {
// Premultiply alpha.
pixels[i + 0] = std::min(255, pixels[i + 0] * pixels[i + 3] / 255);
pixels[i + 1] = std::min(255, pixels[i + 1] * pixels[i + 3] / 255);
pixels[i + 2] = std::min(255, pixels[i + 2] * pixels[i + 3] / 255);
}
}
#if PLATFORM(BLACKBERRY)
paintToCanvas(pixels.get(), m_currentWidth, m_currentHeight,
imageBuffer->internalSize().width(), imageBuffer->internalSize().height(), imageBuffer->context());
#else
paintToCanvas(pixels.get(), m_currentWidth, m_currentHeight,
imageBuffer->internalSize().width(), imageBuffer->internalSize().height(), imageBuffer->context()->platformContext());
#endif
}
void GraphicsContext3D::paintRenderingResultsToCanvas(CanvasRenderingContext* context, DrawingBuffer*)
{
HTMLCanvasElement* canvas = context->canvas();
ImageBuffer* imageBuffer = canvas->buffer();
int rowBytes = m_currentWidth * 4;
int totalBytes = rowBytes * m_currentHeight;
OwnArrayPtr<unsigned char> pixels = adoptArrayPtr(new unsigned char[totalBytes]);
if (!pixels)
return;
readRenderingResults(pixels.get(), totalBytes);
if (!m_attrs.premultipliedAlpha) {
for (int i = 0; i < totalBytes; i += 4) {
// Premultiply alpha.
pixels[i + 0] = std::min(255, pixels[i + 0] * pixels[i + 3] / 255);
pixels[i + 1] = std::min(255, pixels[i + 1] * pixels[i + 3] / 255);
pixels[i + 2] = std::min(255, pixels[i + 2] * pixels[i + 3] / 255);
}
}
paintToCanvas(pixels.get(), m_currentWidth, m_currentHeight,
canvas->width(), canvas->height(), imageBuffer->context()->platformContext());
}
void GraphicsContext3D::paintRenderingResultsToCanvas(CanvasRenderingContext* context)
{
HTMLCanvasElement* canvas = context->canvas();
ImageBuffer* imageBuffer = canvas->buffer();
int rowBytes = m_currentWidth * 4;
int totalBytes = rowBytes * m_currentHeight;
OwnArrayPtr<unsigned char> pixels = adoptArrayPtr(new unsigned char[totalBytes]);
if (!pixels)
return;
makeContextCurrent();
bool mustRestoreFBO = false;
if (m_attrs.antialias) {
::glBindFramebufferEXT(GL_READ_FRAMEBUFFER_EXT, m_multisampleFBO);
::glBindFramebufferEXT(GL_DRAW_FRAMEBUFFER_EXT, m_fbo);
::glBlitFramebufferEXT(0, 0, m_currentWidth, m_currentHeight, 0, 0, m_currentWidth, m_currentHeight, GL_COLOR_BUFFER_BIT, GL_LINEAR);
::glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, m_fbo);
mustRestoreFBO = true;
} else {
if (m_boundFBO != m_fbo) {
mustRestoreFBO = true;
::glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, m_fbo);
}
}
GLint packAlignment = 4;
bool mustRestorePackAlignment = false;
::glGetIntegerv(GL_PACK_ALIGNMENT, &packAlignment);
if (packAlignment > 4) {
::glPixelStorei(GL_PACK_ALIGNMENT, 4);
mustRestorePackAlignment = true;
}
::glReadPixels(0, 0, m_currentWidth, m_currentHeight, GL_BGRA, GL_UNSIGNED_INT_8_8_8_8_REV, pixels.get());
if (mustRestorePackAlignment)
::glPixelStorei(GL_PACK_ALIGNMENT, packAlignment);
if (mustRestoreFBO)
::glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, m_boundFBO);
paintToCanvas(pixels.get(), m_currentWidth, m_currentHeight,
canvas->width(), canvas->height(), imageBuffer->context()->platformContext());
}
