import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

gfx/2d/DrawingJob.cpp

@@ -0,0 +1,120 @@
+/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "DrawingJob.h"
+#include "JobScheduler.h"
+#include "mozilla/gfx/2D.h"
+
+namespace mozilla {
+namespace gfx {
+
+DrawingJobBuilder::DrawingJobBuilder()
+{}
+
+DrawingJobBuilder::~DrawingJobBuilder()
+{
+  MOZ_ASSERT(!mDrawTarget);
+}
+
+void
+DrawingJob::Clear()
+{
+  mCommandBuffer = nullptr;
+  mCursor = 0;
+}
+
+void
+DrawingJobBuilder::BeginDrawingJob(DrawTarget* aTarget, IntPoint aOffset,
+                                     SyncObject* aStart)
+{
+  MOZ_ASSERT(mCommandOffsets.empty());
+  MOZ_ASSERT(aTarget);
+  mDrawTarget = aTarget;
+  mOffset = aOffset;
+  mStart = aStart;
+}
+
+DrawingJob*
+DrawingJobBuilder::EndDrawingJob(CommandBuffer* aCmdBuffer,
+                                   SyncObject* aCompletion,
+                                   WorkerThread* aPinToWorker)
+{
+  MOZ_ASSERT(mDrawTarget);
+  DrawingJob* task = new DrawingJob(mDrawTarget, mOffset, mStart, aCompletion, aPinToWorker);
+  task->mCommandBuffer = aCmdBuffer;
+  task->mCommandOffsets = Move(mCommandOffsets);
+
+  mDrawTarget = nullptr;
+  mOffset = IntPoint();
+  mStart = nullptr;
+
+  return task;
+}
+
+DrawingJob::DrawingJob(DrawTarget* aTarget, IntPoint aOffset,
+                         SyncObject* aStart, SyncObject* aCompletion,
+                         WorkerThread* aPinToWorker)
+: Job(aStart, aCompletion, aPinToWorker)
+, mCommandBuffer(nullptr)
+, mCursor(0)
+, mDrawTarget(aTarget)
+, mOffset(aOffset)
+{
+  mCommandOffsets.reserve(64);
+}
+
+JobStatus
+DrawingJob::Run()
+{
+  while (mCursor < mCommandOffsets.size()) {
+
+    const DrawingCommand* cmd = mCommandBuffer->GetDrawingCommand(mCommandOffsets[mCursor]);
+
+    if (!cmd) {
+      return JobStatus::Error;
+    }
+
+    cmd->ExecuteOnDT(mDrawTarget);
+
+    ++mCursor;
+  }
+
+  return JobStatus::Complete;
+}
+
+DrawingJob::~DrawingJob()
+{
+  Clear();
+}
+
+const DrawingCommand*
+CommandBuffer::GetDrawingCommand(ptrdiff_t aId)
+{
+  return static_cast<DrawingCommand*>(mStorage.GetStorage(aId));
+}
+
+CommandBuffer::~CommandBuffer()
+{
+  mStorage.ForEach([](void* item){
+    static_cast<DrawingCommand*>(item)->~DrawingCommand();
+  });
+  mStorage.Clear();
+}
+
+void
+CommandBufferBuilder::BeginCommandBuffer(size_t aBufferSize)
+{
+  MOZ_ASSERT(!mCommands);
+  mCommands = new CommandBuffer(aBufferSize);
+}
+
+already_AddRefed<CommandBuffer>
+CommandBufferBuilder::EndCommandBuffer()
+{
+  return mCommands.forget();
+}
+
+} // namespace
+} // namespace