本文整理汇总了C++中NotNull::InitWithDrawable方法的典型用法代码示例。如果您正苦于以下问题：C++ NotNull::InitWithDrawable方法的具体用法？C++ NotNull::InitWithDrawable怎么用？C++ NotNull::InitWithDrawable使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类NotNull的用法示例。
在下文中一共展示了NotNull::InitWithDrawable方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: SVGDrawingCallback
void
VectorImage::CreateSurfaceAndShow(const SVGDrawingParameters& aParams)
{
mSVGDocumentWrapper->UpdateViewportBounds(aParams.viewportSize);
mSVGDocumentWrapper->FlushImageTransformInvalidation();
RefPtr<gfxDrawingCallback> cb =
new SVGDrawingCallback(mSVGDocumentWrapper,
IntRect(IntPoint(0, 0), aParams.viewportSize),
aParams.size,
aParams.flags);
RefPtr<gfxDrawable> svgDrawable =
new gfxCallbackDrawable(cb, aParams.size);
bool bypassCache = bool(aParams.flags & FLAG_BYPASS_SURFACE_CACHE) ||
// Refuse to cache animated images:
// XXX(seth): We may remove this restriction in bug 922893.
mHaveAnimations ||
// The image is too big to fit in the cache:
!SurfaceCache::CanHold(aParams.size);
if (bypassCache) {
return Show(svgDrawable, aParams);
}
// We're about to rerasterize, which may mean that some of the previous
// surfaces we've rasterized aren't useful anymore. We can allow them to
// expire from the cache by unlocking them here, and then sending out an
// invalidation. If this image is locked, any surfaces that are still useful
// will become locked again when Draw touches them, and the remainder will
// eventually expire.
SurfaceCache::UnlockEntries(ImageKey(this));
// Try to create an imgFrame, initializing the surface it contains by drawing
// our gfxDrawable into it. (We use FILTER_NEAREST since we never scale here.)
NotNull<RefPtr<imgFrame>> frame = WrapNotNull(new imgFrame);
nsresult rv =
frame->InitWithDrawable(svgDrawable, aParams.size,
SurfaceFormat::B8G8R8A8,
SamplingFilter::POINT, aParams.flags);
// If we couldn't create the frame, it was probably because it would end
// up way too big. Generally it also wouldn't fit in the cache, but the prefs
// could be set such that the cache isn't the limiting factor.
if (NS_FAILED(rv)) {
return Show(svgDrawable, aParams);
}
// Take a strong reference to the frame's surface and make sure it hasn't
// already been purged by the operating system.
RefPtr<SourceSurface> surface = frame->GetSourceSurface();
if (!surface) {
return Show(svgDrawable, aParams);
}
// Attempt to cache the frame.
SurfaceKey surfaceKey = VectorSurfaceKey(aParams.size, aParams.svgContext);
NotNull<RefPtr<ISurfaceProvider>> provider =
WrapNotNull(new SimpleSurfaceProvider(ImageKey(this), surfaceKey, frame));
SurfaceCache::Insert(provider);
// Draw.
RefPtr<gfxDrawable> drawable =
new gfxSurfaceDrawable(surface, aParams.size);
Show(drawable, aParams);
// Send out an invalidation so that surfaces that are still in use get
// re-locked. See the discussion of the UnlockSurfaces call above.
mProgressTracker->SyncNotifyProgress(FLAG_FRAME_COMPLETE,
GetMaxSizedIntRect());
}