void
ContentClientRemoteBuffer::CreateBackBuffer(const IntRect& aBufferRect)
{
// gfx::BackendType::NONE means fallback to the content backend
mTextureClient = CreateTextureClientForDrawing(
mSurfaceFormat, mSize, gfx::BackendType::NONE,
mTextureFlags | ExtraTextureFlags(),
TextureAllocationFlags::ALLOC_CLEAR_BUFFER
);
if (!mTextureClient || !AddTextureClient(mTextureClient)) {
AbortTextureClientCreation();
return;
}
if (mTextureFlags & TextureFlags::COMPONENT_ALPHA) {
mTextureClientOnWhite = mTextureClient->CreateSimilar(
mTextureFlags | ExtraTextureFlags(),
TextureAllocationFlags::ALLOC_CLEAR_BUFFER_WHITE
);
if (!mTextureClientOnWhite || !AddTextureClient(mTextureClientOnWhite)) {
AbortTextureClientCreation();
return;
}
}
}
void
ContentClientDoubleBuffered::CreateFrontBuffer(const nsIntRect& aBufferRect)
{
if (!CreateAndAllocateTextureClient(mFrontClient, TEXTURE_ON_BLACK) ||
!AddTextureClient(mFrontClient)) {
AbortTextureClientCreation();
return;
}
if (mTextureInfo.mTextureFlags & TEXTURE_COMPONENT_ALPHA) {
if (!CreateAndAllocateTextureClient(mFrontClientOnWhite, TEXTURE_ON_WHITE) ||
!AddTextureClient(mFrontClientOnWhite)) {
AbortTextureClientCreation();
return;
}
}
mFrontBufferRect = aBufferRect;
mFrontBufferRotation = nsIntPoint();
}
void
ContentClientRemoteBuffer::BuildTextureClients(SurfaceFormat aFormat,
const nsIntRect& aRect,
uint32_t aFlags)
{
// If we hit this assertion, then it might be due to an empty transaction
// followed by a real transaction. Our buffers should be created (but not
// painted in the empty transaction) and then painted (but not created) in the
// real transaction. That is kind of fragile, and this assert will catch
// circumstances where we screw that up, e.g., by unnecessarily recreating our
// buffers.
NS_ABORT_IF_FALSE(!mIsNewBuffer,
"Bad! Did we create a buffer twice without painting?");
mIsNewBuffer = true;
DestroyBuffers();
mSurfaceFormat = aFormat;
mSize = gfx::IntSize(aRect.width, aRect.height);
mTextureInfo.mTextureFlags = TextureFlagsForRotatedContentBufferFlags(aFlags);
if (!CreateAndAllocateTextureClient(mTextureClient, TEXTURE_ON_BLACK) ||
!AddTextureClient(mTextureClient)) {
AbortTextureClientCreation();
return;
}
if (aFlags & BUFFER_COMPONENT_ALPHA) {
if (!CreateAndAllocateTextureClient(mTextureClientOnWhite, TEXTURE_ON_WHITE) ||
!AddTextureClient(mTextureClientOnWhite)) {
AbortTextureClientCreation();
return;
}
mTextureInfo.mTextureFlags |= TEXTURE_COMPONENT_ALPHA;
}
CreateFrontBuffer(aRect);
}
