void
ClientThebesLayer::RenderLayer()
{
if (GetMaskLayer()) {
ToClientLayer(GetMaskLayer())->RenderLayer();
}
if (!mContentClient) {
mContentClient = ContentClient::CreateContentClient(ClientManager()->AsShadowForwarder());
if (!mContentClient) {
return;
}
mContentClient->Connect();
ClientManager()->AsShadowForwarder()->Attach(mContentClient, this);
MOZ_ASSERT(mContentClient->GetForwarder());
}
mContentClient->BeginPaint();
PaintThebes();
mContentClient->EndPaint();
// It is very important that this is called after EndPaint, because destroying
// textures is a three stage process:
// 1. We are done with the buffer and move it to ContentClient::mOldTextures,
// that happens in DestroyBuffers which is may be called indirectly from
// PaintThebes.
// 2. The content client calls RemoveTextureClient on the texture clients in
// mOldTextures and forgets them. They then become invalid. The compositable
// client keeps a record of IDs. This happens in EndPaint.
// 3. An IPC message is sent to destroy the corresponding texture host. That
// happens from OnTransaction.
// It is important that these steps happen in order.
mContentClient->OnTransaction();
}
bool
ClientTiledLayerBuffer::ProgressiveUpdate(nsIntRegion& aValidRegion,
nsIntRegion& aInvalidRegion,
const nsIntRegion& aOldValidRegion,
BasicTiledLayerPaintData* aPaintData,
LayerManager::DrawThebesLayerCallback aCallback,
void* aCallbackData)
{
bool repeat = false;
bool isBufferChanged = false;
do {
// Compute the region that should be updated. Repeat as many times as
// is required.
nsIntRegion regionToPaint;
repeat = ComputeProgressiveUpdateRegion(aInvalidRegion,
aOldValidRegion,
regionToPaint,
aPaintData,
repeat);
// There's no further work to be done.
if (regionToPaint.IsEmpty()) {
break;
}
isBufferChanged = true;
// Keep track of what we're about to refresh.
aValidRegion.Or(aValidRegion, regionToPaint);
// aValidRegion may have been altered by InvalidateRegion, but we still
// want to display stale content until it gets progressively updated.
// Create a region that includes stale content.
nsIntRegion validOrStale;
validOrStale.Or(aValidRegion, aOldValidRegion);
// Paint the computed region and subtract it from the invalid region.
PaintThebes(validOrStale, regionToPaint, aCallback, aCallbackData);
aInvalidRegion.Sub(aInvalidRegion, regionToPaint);
} while (repeat);
// Return false if nothing has been drawn, or give what has been drawn
// to the shadow layer to upload.
return isBufferChanged;
}
void
ClientThebesLayer::RenderLayer()
{
if (GetMaskLayer()) {
ToClientLayer(GetMaskLayer())->RenderLayer();
}
if (!mContentClient) {
mContentClient = ContentClient::CreateContentClient(ClientManager());
if (!mContentClient) {
return;
}
mContentClient->Connect();
ClientManager()->Attach(mContentClient, this);
MOZ_ASSERT(mContentClient->GetForwarder());
}
mContentClient->BeginPaint();
PaintThebes();
mContentClient->EndPaint();
}
void
ClientPaintedLayer::RenderLayerWithReadback(ReadbackProcessor *aReadback)
{
RenderMaskLayers(this);
if (!EnsureContentClient()) {
return;
}
if (CanRecordLayer(aReadback)) {
if (PaintOffMainThread()) {
return;
}
}
nsTArray<ReadbackProcessor::Update> readbackUpdates;
nsIntRegion readbackRegion;
if (aReadback && UsedForReadback()) {
aReadback->GetPaintedLayerUpdates(this, &readbackUpdates);
}
PaintThebes(&readbackUpdates);
}
