/* static */ already_AddRefed<ImageBitmap>
ImageBitmap::CreateInternal(nsIGlobalObject* aGlobal, HTMLImageElement& aImageEl,
const Maybe<IntRect>& aCropRect, ErrorResult& aRv)
{
// Check if the image element is completely available or not.
if (!aImageEl.Complete()) {
aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
return nullptr;
}
// Check if the image element is a bitmap (e.g. it's a vector graphic) or not.
if (!HasRasterImage(aImageEl)) {
aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
return nullptr;
}
// Get the SourceSurface out from the image element and then do security
// checking.
RefPtr<SourceSurface> surface = GetSurfaceFromElement(aGlobal, aImageEl, aRv);
if (NS_WARN_IF(aRv.Failed())) {
return nullptr;
}
// Create ImageBitmap.
RefPtr<layers::Image> data = CreateImageFromSurface(surface);
if (NS_WARN_IF(!data)) {
aRv.Throw(NS_ERROR_NOT_AVAILABLE);
return nullptr;
}
RefPtr<ImageBitmap> ret = new ImageBitmap(aGlobal, data);
// Set the picture rectangle.
if (ret && aCropRect.isSome()) {
ret->SetPictureRect(aCropRect.ref(), aRv);
}
return ret.forget();
}
