// dispatched function
static void ImageBridgeShutdownStep1(ReentrantMonitor *aBarrier, bool *aDone)
{
ReentrantMonitorAutoEnter autoMon(*aBarrier);
MOZ_ASSERT(InImageBridgeChildThread(),
"Should be in ImageBridgeChild thread.");
MediaSystemResourceManager::Shutdown();
if (sImageBridgeChildSingleton) {
// Force all managed protocols to shut themselves down cleanly
InfallibleTArray<PCompositableChild*> compositables;
sImageBridgeChildSingleton->ManagedPCompositableChild(compositables);
for (int i = compositables.Length() - 1; i >= 0; --i) {
CompositableClient::FromIPDLActor(compositables[i])->Destroy();
}
InfallibleTArray<PTextureChild*> textures;
sImageBridgeChildSingleton->ManagedPTextureChild(textures);
for (int i = textures.Length() - 1; i >= 0; --i) {
TextureClient* client = TextureClient::AsTextureClient(textures[i]);
if (client) {
client->ForceRemove();
}
}
sImageBridgeChildSingleton->SendWillStop();
sImageBridgeChildSingleton->MarkShutDown();
// From now on, no message can be sent through the image bridge from the
// client side except the final Stop message.
}
*aDone = true;
aBarrier->NotifyAll();
}
void
LayerTransactionChild::Destroy()
{
if (!IPCOpen()) {
return;
}
// mDestroyed is used to prevent calling Send__delete__() twice.
// When this function is called from CompositorChild::Destroy(),
// under Send__delete__() call, this function is called from
// ShadowLayerForwarder's destructor.
// When it happens, IPCOpen() is still true.
// See bug 1004191.
mDestroyed = true;
MOZ_ASSERT(0 == ManagedPLayerChild().Count(),
"layers should have been cleaned up by now");
const ManagedContainer<PTextureChild>& textures = ManagedPTextureChild();
for (auto iter = textures.ConstIter(); !iter.Done(); iter.Next()) {
TextureClient* texture = TextureClient::AsTextureClient(iter.Get()->GetKey());
if (texture) {
texture->Destroy();
}
}
SendShutdown();
}
void
LayerTransactionChild::Destroy()
{
if (!IPCOpen()) {
return;
}
// mDestroyed is used to prevent calling Send__delete__() twice.
// When this function is called from CompositorChild::Destroy(),
// under Send__delete__() call, this function is called from
// ShadowLayerForwarder's destructor.
// When it happens, IPCOpen() is still true.
// See bug 1004191.
mDestroyed = true;
MOZ_ASSERT(0 == ManagedPLayerChild().Length(),
"layers should have been cleaned up by now");
for (size_t i = 0; i < ManagedPTextureChild().Length(); ++i) {
TextureClient* texture = TextureClient::AsTextureClient(ManagedPTextureChild()[i]);
if (texture) {
texture->ForceRemove();
}
}
SendShutdown();
}
TextureClient*
PersistentBufferProviderShared::GetTextureClient()
{
// Can't access the front buffer while drawing.
MOZ_ASSERT(!mDrawTarget);
TextureClient* texture = GetTexture(mFront);
if (texture) {
texture->EnableReadLock();
} else {
gfxCriticalNote << "PersistentBufferProviderShared: front buffer unavailable";
}
return texture;
}
void
PersistentBufferProviderShared::Destroy()
{
mSnapshot = nullptr;
mDrawTarget = nullptr;
for (uint32_t i = 0; i < mTextures.length(); ++i) {
TextureClient* texture = mTextures[i];
if (texture && texture->IsLocked()) {
MOZ_ASSERT(false);
texture->Unlock();
}
}
mTextures.clear();
}
bool
PersistentBufferProviderShared::ReturnDrawTarget(already_AddRefed<gfx::DrawTarget> aDT)
{
RefPtr<gfx::DrawTarget> dt(aDT);
MOZ_ASSERT(mDrawTarget == dt);
// Can't change the current front buffer while its snapshot is borrowed!
MOZ_ASSERT(!mSnapshot);
mDrawTarget = nullptr;
dt = nullptr;
TextureClient* back = GetTexture(mBack);
MOZ_ASSERT(back);
if (back) {
back->Unlock();
mFront = mBack;
}
return !!back;
}
void
ClientLayerManager::ReportClientLost(TextureClient& aClient) {
GetTexturePool(aClient.GetFormat())->ReportClientLost();
}
void
ClientLayerManager::ReturnTextureClient(TextureClient& aClient) {
GetTexturePool(aClient.GetFormat())->ReturnTextureClient(&aClient);
}
void
ClientLayerManager::ReturnTextureClientDeferred(TextureClient& aClient) {
GetTexturePool(aClient.GetFormat(),
aClient.GetFlags())->ReturnTextureClientDeferred(&aClient);
}
already_AddRefed<gfx::DrawTarget>
PersistentBufferProviderShared::BorrowDrawTarget(const gfx::IntRect& aPersistedRect)
{
if (!mFwd->GetTextureForwarder()->IPCOpen()) {
return nullptr;
}
MOZ_ASSERT(!mSnapshot);
if (IsActivityTracked()) {
mFwd->GetActiveResourceTracker().MarkUsed(this);
} else {
mFwd->GetActiveResourceTracker().AddObject(this);
}
if (mDrawTarget) {
RefPtr<gfx::DrawTarget> dt(mDrawTarget);
return dt.forget();
}
mFront = Nothing();
auto previousBackBuffer = mBack;
TextureClient* tex = GetTexture(mBack);
// First try to reuse the current back buffer. If we can do that it means
// we can skip copying its content to the new back buffer.
if (tex && tex->IsReadLocked()) {
// The back buffer is currently used by the compositor, we can't draw
// into it.
tex = nullptr;
}
if (!tex) {
// Try to grab an already allocated texture if any is available.
for (uint32_t i = 0; i < mTextures.length(); ++i) {
if (!mTextures[i]->IsReadLocked()) {
mBack = Some(i);
tex = mTextures[i];
break;
}
}
}
if (!tex) {
// We have to allocate a new texture.
if (mTextures.length() >= 4) {
// We should never need to buffer that many textures, something's wrong.
MOZ_ASSERT(false);
// In theory we throttle the main thread when the compositor can't keep up,
// so we shoud never get in a situation where we sent 4 textures to the
// compositor and the latter as not released any of them.
// This seems to happen, however, in some edge cases such as just after a
// device reset (cf. Bug 1291163).
// It would be pretty bad to keep piling textures up at this point so we
// call NotifyInactive to remove some of our textures.
NotifyInactive();
// Give up now. The caller can fall-back to a non-shared buffer provider.
return nullptr;
}
RefPtr<TextureClient> newTexture = TextureClient::CreateForDrawing(
mFwd, mFormat, mSize,
BackendSelector::Canvas,
TextureFlags::DEFAULT,
TextureAllocationFlags::ALLOC_DEFAULT
);
MOZ_ASSERT(newTexture);
if (newTexture) {
if (mTextures.append(newTexture)) {
tex = newTexture;
mBack = Some<uint32_t>(mTextures.length() - 1);
}
}
}
if (!tex || !tex->Lock(OpenMode::OPEN_READ_WRITE)) {
return nullptr;
}
if (mBack != previousBackBuffer && !aPersistedRect.IsEmpty()) {
TextureClient* previous = GetTexture(previousBackBuffer);
if (previous && previous->Lock(OpenMode::OPEN_READ)) {
DebugOnly<bool> success = previous->CopyToTextureClient(tex, &aPersistedRect, nullptr);
MOZ_ASSERT(success);
previous->Unlock();
}
}
mDrawTarget = tex->BorrowDrawTarget();
RefPtr<gfx::DrawTarget> dt(mDrawTarget);
return dt.forget();
}