Verified Commit 51680c11 authored by Lee Salzman's avatar Lee Salzman Committed by ma1
Browse files

Bug 1986185. r=aosmond a=RyanVM 

Backported manually to 128esr, see BB 44199

Differential Revision: https://phabricator.services.mozilla.com/D263287
parent b96034cc

gfx/layers/ipc/CanvasTranslator.cpp

+12 −0
Original line number Diff line number Diff line
@@ -189,6 +189,10 @@ mozilla::ipc::IPCResult CanvasTranslator::RecvInitTranslator( 
  }



  // Use the first buffer as our current buffer.

  if (aBufferHandles.IsEmpty()) {

    Deactivate();

    return IPC_FAIL(this, "No canvas buffer shared memory supplied.");

  }

  mDefaultBufferSize = aBufferSize;

  auto handleIter = aBufferHandles.begin();

  if (!CreateAndMapShmem(mCurrentShmem.shmem, std::move(*handleIter),
@@ -365,11 +369,19 @@ void CanvasTranslator::GetDataSurface(uint64_t aSurfaceRef) { 
}



void CanvasTranslator::RecycleBuffer() {

  if (!mCurrentShmem.IsValid()) {

    return;

  }



  mCanvasShmems.emplace(std::move(mCurrentShmem));

  NextBuffer();

}



void CanvasTranslator::NextBuffer() {

  if (mCanvasShmems.empty()) {

    return;

  }



  // Check and signal the writer when we finish with a buffer, because it

  // might have hit the buffer count limit and be waiting to use our old one.

  CheckAndSignalWriter();