1 files changed, 142 insertions, 0 deletions
diff --git a/gpu/command_buffer/service/gpu_scheduler_mac.cc b/gpu/command_buffer/service/gpu_scheduler_mac.cc
new file mode 100644
index 0000000..f89bfb5
--- /dev/null
+++ b/gpu/command_buffer/service/gpu_scheduler_mac.cc
@@ -0,0 +1,142 @@
+// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "gpu/command_buffer/service/gpu_scheduler.h"
+#include "ui/gfx/gl/gl_context.h"
+
+using ::base::SharedMemory;
+
+namespace gpu {
+
+bool GpuScheduler::Initialize(
+    gfx::PluginWindowHandle window,
+    const gfx::Size& size,
+    const gles2::DisallowedExtensions& disallowed_extensions,
+    const char* allowed_extensions,
+    const std::vector<int32>& attribs,
+    GpuScheduler* parent,
+    uint32 parent_texture_id) {
+  // Get the parent decoder and the GLContext to share IDs with, if any.
+  gles2::GLES2Decoder* parent_decoder = NULL;
+  gfx::GLContext* parent_context = NULL;
+  if (parent) {
+    parent_decoder = parent->decoder_.get();
+    DCHECK(parent_decoder);
+
+    parent_context = parent_decoder->GetGLContext();
+    DCHECK(parent_context);
+  }
+
+  scoped_ptr<gfx::GLContext> context(
+      gfx::GLContext::CreateOffscreenGLContext(parent_context));
+  if (!context.get())
+    return false;
+
+  // On Mac OS X since we can not render on-screen we don't even
+  // attempt to create a view based GLContext. The only difference
+  // between "on-screen" and "off-screen" rendering on this platform
+  // is whether we allocate an AcceleratedSurface, which transmits the
+  // rendering results back to the browser.
+  if (window) {
+    surface_.reset(new AcceleratedSurface());
+
+    // Note that although the GLContext is passed to Initialize and the
+    // GLContext will later be owned by the decoder, AcceleratedSurface does
+    // not hold on to the reference. It simply extracts the underlying GL
+    // context in order to share the namespace with another context.
+    if (!surface_->Initialize(context.get(), false)) {
+      LOG(ERROR) << "GpuScheduler::Initialize failed to "
+                 << "initialize AcceleratedSurface.";
+      Destroy();
+      return false;
+    }
+  }
+
+  return InitializeCommon(context.release(),
+                          size,
+                          disallowed_extensions,
+                          allowed_extensions,
+                          attribs,
+                          parent_decoder,
+                          parent_texture_id);
+}
+
+void GpuScheduler::Destroy() {
+  if (surface_.get()) {
+    surface_->Destroy();
+    surface_.reset();
+  }
+
+  DestroyCommon();
+}
+
+uint64 GpuScheduler::SetWindowSizeForIOSurface(const gfx::Size& size) {
+  // This is called from an IPC handler, so it's undefined which context is
+  // current. Make sure the right one is.
+  decoder_->GetGLContext()->MakeCurrent();
+
+  ResizeOffscreenFrameBuffer(size);
+  decoder_->UpdateOffscreenFrameBufferSize();
+
+  // Note: The following line changes the current context again.
+  return surface_->SetSurfaceSize(size);
+}
+
+TransportDIB::Handle GpuScheduler::SetWindowSizeForTransportDIB(
+    const gfx::Size& size) {
+  ResizeOffscreenFrameBuffer(size);
+  decoder_->UpdateOffscreenFrameBufferSize();
+  return surface_->SetTransportDIBSize(size);
+}
+
+void GpuScheduler::SetTransportDIBAllocAndFree(
+      Callback2<size_t, TransportDIB::Handle*>::Type* allocator,
+      Callback1<TransportDIB::Id>::Type* deallocator) {
+  surface_->SetTransportDIBAllocAndFree(allocator, deallocator);
+}
+
+uint64 GpuScheduler::GetSurfaceId() {
+  if (!surface_.get())
+    return 0;
+  return surface_->GetSurfaceId();
+}
+
+uint64 GpuScheduler::swap_buffers_count() const {
+  return swap_buffers_count_;
+}
+
+void GpuScheduler::set_acknowledged_swap_buffers_count(
+    uint64 acknowledged_swap_buffers_count) {
+  acknowledged_swap_buffers_count_ = acknowledged_swap_buffers_count;
+}
+
+void GpuScheduler::DidDestroySurface() {
+  // When a browser window with a GpuScheduler is closed, the render process
+  // will attempt to finish all GL commands, it will busy-wait on the GPU
+  // process until the command queue is empty. If a paint is pending, the GPU
+  // process won't process any GL commands until the browser sends a paint ack,
+  // but since the browser window is already closed, it will never arrive.
+  // To break this infinite loop, the browser tells the GPU process that the
+  // surface became invalid, which causes the GPU process to not wait for paint
+  // acks.
+  surface_.reset();
+}
+
+void GpuScheduler::WillSwapBuffers() {
+  DCHECK(decoder_.get());
+  DCHECK(decoder_->GetGLContext());
+  DCHECK(decoder_->GetGLContext()->IsCurrent());
+
+  ++swap_buffers_count_;
+
+  if (surface_.get()) {
+    surface_->SwapBuffers();
+  }
+
+  if (wrapped_swap_buffers_callback_.get()) {
+    wrapped_swap_buffers_callback_->Run();
+  }
+}
+
+}  // namespace gpu