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());
}
PassRefPtr<ImageData> GraphicsContext3D::paintRenderingResultsToImageData(DrawingBuffer*)
{
// Reading premultiplied alpha would involve unpremultiplying, which is
// lossy.
if (m_attrs.premultipliedAlpha)
return 0;
RefPtr<ImageData> imageData = ImageData::create(IntSize(m_currentWidth, m_currentHeight));
unsigned char* pixels = imageData->data()->data();
int totalBytes = 4 * m_currentWidth * m_currentHeight;
readRenderingResults(pixels, totalBytes);
// Convert to RGBA.
for (int i = 0; i < totalBytes; i += 4)
std::swap(pixels[i], pixels[i + 2]);
return imageData.release();
}
