void
LayerManagerComposite::UpdateAndRender()
{
nsIntRegion invalid;
bool didEffectiveTransforms = false;
nsIntRegion opaque;
LayerIntRegion visible;
PostProcessLayers(mRoot, opaque, visible, Nothing());
if (mClonedLayerTreeProperties) {
// Effective transforms are needed by ComputeDifferences().
mRoot->ComputeEffectiveTransforms(gfx::Matrix4x4());
didEffectiveTransforms = true;
// We need to compute layer tree differences even if we're not going to
// immediately use the resulting damage area, since ComputeDifferences
// is also responsible for invalidates intermediate surfaces in
// ContainerLayers.
nsIntRegion changed = mClonedLayerTreeProperties->ComputeDifferences(mRoot, nullptr, &mGeometryChanged);
if (mTarget) {
// Since we're composing to an external target, we're not going to use
// the damage region from layers changes - we want to composite
// everything in the target bounds. Instead we accumulate the layers
// damage region for the next window composite.
mInvalidRegion.Or(mInvalidRegion, changed);
} else {
invalid = Move(changed);
}
}
if (mTarget) {
invalid.Or(invalid, mTargetBounds);
} else {
// If we didn't have a previous layer tree, invalidate the entire render
// area.
if (!mClonedLayerTreeProperties) {
invalid.Or(invalid, mRenderBounds);
}
// Add any additional invalid rects from the window manager or previous
// damage computed during ComposeToTarget().
invalid.Or(invalid, mInvalidRegion);
mInvalidRegion.SetEmpty();
}
if (invalid.IsEmpty() && !mWindowOverlayChanged) {
// Composition requested, but nothing has changed. Don't do any work.
mClonedLayerTreeProperties = LayerProperties::CloneFrom(GetRoot());
return;
}
// We don't want our debug overlay to cause more frames to happen
// so we will invalidate after we've decided if something changed.
InvalidateDebugOverlay(invalid, mRenderBounds);
if (!didEffectiveTransforms) {
// The results of our drawing always go directly into a pixel buffer,
// so we don't need to pass any global transform here.
mRoot->ComputeEffectiveTransforms(gfx::Matrix4x4());
}
Render(invalid, opaque);
#if defined(MOZ_WIDGET_ANDROID)
RenderToPresentationSurface();
#endif
mGeometryChanged = false;
mWindowOverlayChanged = false;
// Update cached layer tree information.
mClonedLayerTreeProperties = LayerProperties::CloneFrom(GetRoot());
}
void
LayerManagerComposite::EndTransaction(const TimeStamp& aTimeStamp,
EndTransactionFlags aFlags)
{
NS_ASSERTION(mInTransaction, "Didn't call BeginTransaction?");
NS_ASSERTION(!(aFlags & END_NO_COMPOSITE),
"Shouldn't get END_NO_COMPOSITE here");
mInTransaction = false;
if (!mIsCompositorReady) {
return;
}
mIsCompositorReady = false;
#ifdef MOZ_LAYERS_HAVE_LOG
MOZ_LAYERS_LOG((" ----- (beginning paint)"));
Log();
#endif
if (mDestroyed) {
NS_WARNING("Call on destroyed layer manager");
return;
}
// Set composition timestamp here because we need it in
// ComputeEffectiveTransforms (so the correct video frame size is picked) and
// also to compute invalid regions properly.
mCompositor->SetCompositionTime(aTimeStamp);
if (mRoot && mClonedLayerTreeProperties) {
MOZ_ASSERT(!mTarget);
nsIntRegion invalid =
mClonedLayerTreeProperties->ComputeDifferences(mRoot, nullptr, &mGeometryChanged);
mClonedLayerTreeProperties = nullptr;
mInvalidRegion.Or(mInvalidRegion, invalid);
} else if (!mTarget) {
mInvalidRegion.Or(mInvalidRegion, mRenderBounds);
}
if (mInvalidRegion.IsEmpty() && !mTarget) {
// Composition requested, but nothing has changed. Don't do any work.
return;
}
if (mRoot && !(aFlags & END_NO_IMMEDIATE_REDRAW)) {
MOZ_ASSERT(!aTimeStamp.IsNull());
// The results of our drawing always go directly into a pixel buffer,
// so we don't need to pass any global transform here.
mRoot->ComputeEffectiveTransforms(gfx::Matrix4x4());
nsIntRegion opaque;
ApplyOcclusionCulling(mRoot, opaque);
Render();
#ifdef MOZ_WIDGET_ANDROID
RenderToPresentationSurface();
#endif
mGeometryChanged = false;
} else {
// Modified layer tree
mGeometryChanged = true;
}
mCompositor->ClearTargetContext();
mTarget = nullptr;
#ifdef MOZ_LAYERS_HAVE_LOG
Log();
MOZ_LAYERS_LOG(("]----- EndTransaction"));
#endif
}
void
LayerManagerComposite::EndTransaction(DrawPaintedLayerCallback aCallback,
void* aCallbackData,
EndTransactionFlags aFlags)
{
NS_ASSERTION(mInTransaction, "Didn't call BeginTransaction?");
NS_ASSERTION(!aCallback && !aCallbackData, "Not expecting callbacks here");
mInTransaction = false;
if (!mIsCompositorReady) {
return;
}
mIsCompositorReady = false;
#ifdef MOZ_LAYERS_HAVE_LOG
MOZ_LAYERS_LOG((" ----- (beginning paint)"));
Log();
#endif
if (mDestroyed) {
NS_WARNING("Call on destroyed layer manager");
return;
}
if (mRoot && mClonedLayerTreeProperties) {
MOZ_ASSERT(!mTarget);
nsIntRegion invalid =
mClonedLayerTreeProperties->ComputeDifferences(mRoot, nullptr, &mGeometryChanged);
mClonedLayerTreeProperties = nullptr;
mInvalidRegion.Or(mInvalidRegion, invalid);
} else if (!mTarget) {
mInvalidRegion.Or(mInvalidRegion, mRenderBounds);
}
if (mRoot && !(aFlags & END_NO_IMMEDIATE_REDRAW)) {
if (aFlags & END_NO_COMPOSITE) {
// Apply pending tree updates before recomputing effective
// properties.
mRoot->ApplyPendingUpdatesToSubtree();
}
// The results of our drawing always go directly into a pixel buffer,
// so we don't need to pass any global transform here.
mRoot->ComputeEffectiveTransforms(gfx::Matrix4x4());
nsIntRegion opaque;
ApplyOcclusionCulling(mRoot, opaque);
Render();
#ifdef MOZ_WIDGET_ANDROID
RenderToPresentationSurface();
#endif
mGeometryChanged = false;
} else {
// Modified layer tree
mGeometryChanged = true;
}
mCompositor->ClearTargetContext();
mTarget = nullptr;
#ifdef MOZ_LAYERS_HAVE_LOG
Log();
MOZ_LAYERS_LOG(("]----- EndTransaction"));
#endif
}