void LayerTextureSubImage::uploadWithMapTexSubImage(const uint8_t* image, const IntRect& imageRect,
const IntRect& sourceRect, const IntRect& destRect,
GC3Denum format, GraphicsContext3D* context)
{
TRACE_EVENT("LayerTextureSubImage::uploadWithMapTexSubImage", this, 0);
// Offset from image-rect to source-rect.
IntPoint offset(sourceRect.x() - imageRect.x(), sourceRect.y() - imageRect.y());
// Upload tile data via a mapped transfer buffer
Extensions3DChromium* extensions = static_cast<Extensions3DChromium*>(context->getExtensions());
uint8_t* pixelDest = static_cast<uint8_t*>(extensions->mapTexSubImage2DCHROMIUM(GraphicsContext3D::TEXTURE_2D, 0, destRect.x(), destRect.y(), destRect.width(), destRect.height(), format, GraphicsContext3D::UNSIGNED_BYTE, Extensions3DChromium::WRITE_ONLY));
if (!pixelDest) {
uploadWithTexSubImage(image, imageRect, sourceRect, destRect, format, context);
return;
}
if (imageRect.width() == sourceRect.width() && !offset.x())
memcpy(pixelDest, &image[4 * offset.y() * imageRect.width()], imageRect.width() * destRect.height() * 4);
else {
// Strides not equal, so do a row-by-row memcpy from the
// paint results into the pixelDest
for (int row = 0; row < destRect.height(); ++row)
memcpy(&pixelDest[destRect.width() * 4 * row],
&image[4 * (offset.x() + (offset.y() + row) * imageRect.width())],
destRect.width() * 4);
}
extensions->unmapTexSubImage2DCHROMIUM(pixelDest);
}
void LayerTextureSubImage::uploadWithMapTexSubImage(const uint8_t* image, const IntRect& imageRect,
const IntRect& sourceRect, const IntSize& destOffset,
GC3Denum format, WebGraphicsContext3D* context)
{
TRACE_EVENT0("cc", "LayerTextureSubImage::uploadWithMapTexSubImage");
// Offset from image-rect to source-rect.
IntPoint offset(sourceRect.x() - imageRect.x(), sourceRect.y() - imageRect.y());
// Upload tile data via a mapped transfer buffer
uint8_t* pixelDest = static_cast<uint8_t*>(context->mapTexSubImage2DCHROMIUM(GraphicsContext3D::TEXTURE_2D, 0, destOffset.width(), destOffset.height(), sourceRect.width(), sourceRect.height(), format, GraphicsContext3D::UNSIGNED_BYTE, Extensions3DChromium::WRITE_ONLY));
if (!pixelDest) {
uploadWithTexSubImage(image, imageRect, sourceRect, destOffset, format, context);
return;
}
unsigned int componentsPerPixel;
unsigned int bytesPerComponent;
if (!GraphicsContext3D::computeFormatAndTypeParameters(format, GraphicsContext3D::UNSIGNED_BYTE, &componentsPerPixel, &bytesPerComponent)) {
ASSERT_NOT_REACHED();
return;
}
if (imageRect.width() == sourceRect.width() && !offset.x())
memcpy(pixelDest, &image[offset.y() * imageRect.width() * componentsPerPixel * bytesPerComponent], imageRect.width() * sourceRect.height() * componentsPerPixel * bytesPerComponent);
else {
// Strides not equal, so do a row-by-row memcpy from the
// paint results into the pixelDest
for (int row = 0; row < sourceRect.height(); ++row)
memcpy(&pixelDest[sourceRect.width() * row * componentsPerPixel * bytesPerComponent],
&image[4 * (offset.x() + (offset.y() + row) * imageRect.width())],
sourceRect.width() * componentsPerPixel * bytesPerComponent);
}
GLC(context, context->unmapTexSubImage2DCHROMIUM(pixelDest));
}
void LayerTextureSubImage::upload(const uint8_t* image, const IntRect& imageRect,
const IntRect& sourceRect, const IntSize& destOffset,
GC3Denum format, WebGraphicsContext3D* context)
{
if (m_useMapTexSubImage)
uploadWithMapTexSubImage(image, imageRect, sourceRect, destOffset, format, context);
else
uploadWithTexSubImage(image, imageRect, sourceRect, destOffset, format, context);
}