bool GraphicsContext3DInternal::paintCompositedResultsToCanvas(CanvasRenderingContext* context)
{
LOGWEBGL("paintCompositedResultsToCanvas()");
ImageBuffer* imageBuffer = context->canvas()->buffer();
const SkBitmap& canvasBitmap =
imageBuffer->context()->platformContext()->recordingCanvas()->getDevice()->accessBitmap(false);
SkCanvas canvas(canvasBitmap);
MutexLocker lock(m_fboMutex);
FBO* fbo = m_frontFBO;
if (!fbo)
return false;
SkBitmap bitmap;
bitmap.setConfig(SkBitmap::kARGB_8888_Config, m_width, m_height, fbo->bytesPerRow());
unsigned char* bits = NULL;
if (fbo->lockGraphicBuffer((void**)&bits)) {
bitmap.setPixels(bits);
SkRect dstRect;
dstRect.iset(0, 0, imageBuffer->size().width(), imageBuffer->size().height());
canvas.save();
canvas.translate(0, SkIntToScalar(imageBuffer->size().height()));
canvas.scale(SK_Scalar1, -SK_Scalar1);
canvas.drawBitmapRect(bitmap, 0, dstRect);
canvas.restore();
bitmap.setPixels(0);
fbo->unlockGraphicBuffer();
}
return true;
}
PassRefPtr<ImageData> GraphicsContext3DInternal::paintRenderingResultsToImageData()
{
LOGWEBGL("paintRenderingResultsToImageData()");
// Reading premultiplied alpha would involve unpremultiplying, which is lossy.
if (m_attrs.premultipliedAlpha)
return 0;
RefPtr<ImageData> imageData = ImageData::create(IntSize(m_width, m_height));
unsigned char* pixels = imageData->data()->data()->data();
//[CAPPFIX_WEB_WEBGL] - better performance
if (m_canvasDirty) {
glReadPixels(0, 0, m_width, m_height, GL_RGBA, GL_UNSIGNED_BYTE, pixels);
} else {
LOGWEBGL("paintRenderingResultsToImageData() >>> from clean canvas, so read the back buffer >>> m_canvasDirty:%d", m_canvasDirty);
unsigned char* bits;
MutexLocker lock(m_fboMutex);
FBO* fbo = m_frontFBO;
if (!fbo)
return NULL;
if (fbo->lockGraphicBuffer((void**)&bits)) {
memcpy(pixels, bits, (m_width * m_height * 4));
fbo->unlockGraphicBuffer();
}
}
LOGWEBGL("-paintRenderingResultsToImageData()");
// [CAPPFIX_WEB_WEBGL_END]
return imageData;
}
