void
BasicShadowableCanvasLayer::Paint(gfxContext* aContext, Layer* aMaskLayer)
{
if (!HasShadow()) {
BasicCanvasLayer::Paint(aContext, aMaskLayer);
return;
}
if (!IsDirty())
return;
if (mGLContext &&
!mForceReadback &&
BasicManager()->GetParentBackendType() == mozilla::layers::LAYERS_OPENGL) {
TextureImage::TextureShareType flags;
// if process type is default, then it is single-process (non-e10s)
if (XRE_GetProcessType() == GeckoProcessType_Default)
flags = TextureImage::ThreadShared;
else
flags = TextureImage::ProcessShared;
SharedTextureHandle handle = GetSharedBackBufferHandle();
if (!handle) {
handle = mGLContext->CreateSharedHandle(flags);
if (handle) {
mBackBuffer = SharedTextureDescriptor(flags, handle, mBounds.Size(), false);
}
}
if (handle) {
mGLContext->MakeCurrent();
mGLContext->UpdateSharedHandle(flags, handle);
// call Painted() to reset our dirty 'bit'
Painted();
FireDidTransactionCallback();
BasicManager()->PaintedCanvas(BasicManager()->Hold(this),
mNeedsYFlip,
mBackBuffer);
// Move SharedTextureHandle ownership to ShadowLayer
mBackBuffer = SurfaceDescriptor();
return;
}
}
bool isOpaque = (GetContentFlags() & CONTENT_OPAQUE);
if (!IsSurfaceDescriptorValid(mBackBuffer) ||
isOpaque != mBufferIsOpaque) {
DestroyBackBuffer();
mBufferIsOpaque = isOpaque;
gfxIntSize size(mBounds.width, mBounds.height);
gfxASurface::gfxContentType type = isOpaque ?
gfxASurface::CONTENT_COLOR : gfxASurface::CONTENT_COLOR_ALPHA;
if (!BasicManager()->AllocBuffer(size, type, &mBackBuffer)) {
NS_RUNTIMEABORT("creating CanvasLayer back buffer failed!");
}
}
AutoOpenSurface autoBackSurface(OPEN_READ_WRITE, mBackBuffer);
if (aMaskLayer) {
static_cast<BasicImplData*>(aMaskLayer->ImplData())
->Paint(aContext, nullptr);
}
UpdateSurface(autoBackSurface.Get(), nullptr);
FireDidTransactionCallback();
BasicManager()->PaintedCanvas(BasicManager()->Hold(this),
mNeedsYFlip, mBackBuffer);
}
virtual void Disconnect()
{
DestroyBackBuffer();
ClientLayer::Disconnect();
}
virtual ~BasicShadowableCanvasLayer()
{
DestroyBackBuffer();
MOZ_COUNT_DTOR(BasicShadowableCanvasLayer);
}
