VectorImage::GetFrame(uint32_t aWhichFrame,
uint32_t aFlags)
{
MOZ_ASSERT(aWhichFrame <= FRAME_MAX_VALUE);
if (aWhichFrame > FRAME_MAX_VALUE) {
return nullptr;
}
if (mError || !mIsFullyLoaded) {
return nullptr;
}
// Look up height & width
// ----------------------
SVGSVGElement* svgElem = mSVGDocumentWrapper->GetRootSVGElem();
MOZ_ASSERT(svgElem, "Should have a root SVG elem, since we finished "
"loading without errors");
nsIntSize imageIntSize(svgElem->GetIntrinsicWidth(),
svgElem->GetIntrinsicHeight());
if (imageIntSize.IsEmpty()) {
// We'll get here if our SVG doc has a percent-valued or negative width or
// height.
return nullptr;
}
// Make our surface the size of what will ultimately be drawn to it.
// (either the full image size, or the restricted region)
RefPtr<DrawTarget> dt = gfxPlatform::GetPlatform()->
CreateOffscreenContentDrawTarget(IntSize(imageIntSize.width,
imageIntSize.height),
SurfaceFormat::B8G8R8A8);
if (!dt) {
NS_ERROR("Could not create a DrawTarget");
return nullptr;
}
nsRefPtr<gfxContext> context = new gfxContext(dt);
auto result = Draw(context, imageIntSize,
ImageRegion::Create(imageIntSize),
aWhichFrame, GraphicsFilter::FILTER_NEAREST,
Nothing(), aFlags);
return result == DrawResult::SUCCESS ? dt->Snapshot() : nullptr;
}
VectorImage::GetFrame(uint32_t aWhichFrame, uint32_t aFlags)
{
// Look up height & width
// ----------------------
SVGSVGElement* svgElem = mSVGDocumentWrapper->GetRootSVGElem();
MOZ_ASSERT(svgElem, "Should have a root SVG elem, since we finished "
"loading without errors");
nsIntSize imageIntSize(svgElem->GetIntrinsicWidth(),
svgElem->GetIntrinsicHeight());
if (imageIntSize.IsEmpty()) {
// We'll get here if our SVG doc has a percent-valued or negative width or
// height.
return nullptr;
}
return GetFrameAtSize(imageIntSize, aWhichFrame, aFlags);
}
