Completed the implementation for PPB_Graphics3D interface.

- Mostly copied from the implementations for PPB_Surface3D and PPB_Context3D.
- Added the proxy implementation
- Refactored common code between host and plugin side into a common class.

I will send the changes to bind Graphics3D with Instance and OpenGLES2 interface in a separate patch.

BUG=86370,78087

Review URL: http://codereview.chromium.org/6824006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@92885 0039d316-1c4b-4281-b951-d872f2087c98

3 files changed, 168 insertions, 0 deletions

diff --git a/ppapi/shared_impl/DEPS b/ppapi/shared_impl/DEPS
index 512b07b..013d2acf 100644
--- a/ppapi/shared_impl/DEPS
+++ b/ppapi/shared_impl/DEPS
@@ -1,5 +1,6 @@
 include_rules = [
   "+base",
+  "+gpu",
   "+skia",
   "+webkit/glue",
 
diff --git a/ppapi/shared_impl/graphics_3d_impl.cc b/ppapi/shared_impl/graphics_3d_impl.cc
new file mode 100644
index 0000000..e7f5c70
--- /dev/null
+++ b/ppapi/shared_impl/graphics_3d_impl.cc
@@ -0,0 +1,104 @@
+// 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 "ppapi/shared_impl/graphics_3d_impl.h"
+
+#include "gpu/command_buffer/client/gles2_cmd_helper.h"
+#include "gpu/command_buffer/client/gles2_implementation.h"
+#include "ppapi/c/pp_errors.h"
+
+namespace ppapi {
+
+Graphics3DImpl::Graphics3DImpl()
+    : transfer_buffer_id_(-1),
+      swap_callback_(PP_BlockUntilComplete()) {
+}
+
+Graphics3DImpl::~Graphics3DImpl() {
+  // Make sure that GLES2 implementation has already been destroyed.
+  DCHECK_EQ(transfer_buffer_id_, -1);
+  DCHECK(!gles2_helper_.get());
+  DCHECK(!gles2_impl_.get());
+}
+
+int32_t Graphics3DImpl::GetAttribs(int32_t* attrib_list) {
+  // TODO(alokp): Implement me.
+  return PP_ERROR_FAILED;
+}
+
+int32_t Graphics3DImpl::SetAttribs(int32_t* attrib_list) {
+  // TODO(alokp): Implement me.
+  return PP_ERROR_FAILED;
+}
+
+int32_t Graphics3DImpl::SwapBuffers(PP_CompletionCallback callback) {
+  if (!callback.func) {
+    // Blocking SwapBuffers isn't supported (since we have to be on the main
+    // thread).
+    return PP_ERROR_BADARGUMENT;
+  }
+
+  if (HasPendingSwap()) {
+    // Already a pending SwapBuffers that hasn't returned yet.
+    return PP_ERROR_INPROGRESS;
+  }
+
+  swap_callback_ = callback;
+  return DoSwapBuffers();
+}
+
+void Graphics3DImpl::SwapBuffersACK(int32_t pp_error) {
+  DCHECK(HasPendingSwap());
+  PP_RunAndClearCompletionCallback(&swap_callback_, pp_error);
+}
+
+bool Graphics3DImpl::CreateGLES2Impl(int32 command_buffer_size,
+                                     int32 transfer_buffer_size) {
+  gpu::CommandBuffer* command_buffer = GetCommandBuffer();
+  DCHECK(command_buffer);
+
+  // Create the GLES2 helper, which writes the command buffer protocol.
+  gles2_helper_.reset(new gpu::gles2::GLES2CmdHelper(command_buffer));
+  if (!gles2_helper_->Initialize(command_buffer_size))
+    return false;
+
+  // Create a transfer buffer used to copy resources between the renderer
+  // process and the GPU process.
+  transfer_buffer_id_ =
+      command_buffer->CreateTransferBuffer(transfer_buffer_size, -1);
+  if (transfer_buffer_id_ < 0)
+    return false;
+
+  // Map the buffer into the renderer process's address space.
+  gpu::Buffer transfer_buffer =
+      command_buffer->GetTransferBuffer(transfer_buffer_id_);
+  if (!transfer_buffer.ptr)
+    return false;
+
+  // Create the object exposing the OpenGL API.
+  gles2_impl_.reset(new gpu::gles2::GLES2Implementation(
+      gles2_helper_.get(),
+      transfer_buffer.size,
+      transfer_buffer.ptr,
+      transfer_buffer_id_,
+      false));
+
+  return true;
+}
+
+void Graphics3DImpl::DestroyGLES2Impl() {
+  gles2_impl_.reset();
+
+  if (transfer_buffer_id_ != -1) {
+    gpu::CommandBuffer* command_buffer = GetCommandBuffer();
+    DCHECK(command_buffer);
+    command_buffer->DestroyTransferBuffer(transfer_buffer_id_);
+    transfer_buffer_id_ = -1;
+  }
+
+  gles2_helper_.reset();
+}
+
+}  // namespace ppapi
+
diff --git a/ppapi/shared_impl/graphics_3d_impl.h b/ppapi/shared_impl/graphics_3d_impl.h
new file mode 100644
index 0000000..41a71af
--- /dev/null
+++ b/ppapi/shared_impl/graphics_3d_impl.h
@@ -0,0 +1,63 @@
+// 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.
+
+#ifndef PPAPI_SHARED_IMPL_GRAPHICS_3D_IMPL_H_
+#define PPAPI_SHARED_IMPL_GRAPHICS_3D_IMPL_H_
+
+#include "base/basictypes.h"
+#include "base/memory/scoped_ptr.h"
+#include "ppapi/c/pp_completion_callback.h"
+#include "ppapi/thunk/ppb_graphics_3d_api.h"
+
+namespace gpu {
+class CommandBuffer;
+namespace gles2 {
+class GLES2CmdHelper;
+class GLES2Implementation;
+}  // namespace gles2
+}  // namespace gpu.
+
+namespace ppapi {
+
+class Graphics3DImpl : public thunk::PPB_Graphics3D_API {
+ public:
+  // PPB_Graphics3D_API implementation.
+  virtual int32_t GetAttribs(int32_t* attrib_list) OVERRIDE;
+  virtual int32_t SetAttribs(int32_t* attrib_list) OVERRIDE;
+  virtual int32_t SwapBuffers(PP_CompletionCallback callback) OVERRIDE;
+
+  gpu::gles2::GLES2Implementation* gles2_impl() {
+    return gles2_impl_.get();
+  }
+
+  // Sends swap-buffers notification to the plugin.
+  void SwapBuffersACK(int32_t pp_error);
+
+ protected:
+  Graphics3DImpl();
+  virtual ~Graphics3DImpl();
+
+  virtual gpu::CommandBuffer* GetCommandBuffer() = 0;
+  virtual int32 DoSwapBuffers() = 0;
+
+  bool HasPendingSwap() { return swap_callback_.func != NULL; }
+  bool CreateGLES2Impl(int32 command_buffer_size,
+                       int32 transfer_buffer_size);
+  void DestroyGLES2Impl();
+
+ private:
+  int32 transfer_buffer_id_;
+  scoped_ptr<gpu::gles2::GLES2CmdHelper> gles2_helper_;
+  scoped_ptr<gpu::gles2::GLES2Implementation> gles2_impl_;
+
+  // Callback that needs to be executed when swap-buffers is completed.
+  PP_CompletionCallback swap_callback_;
+
+  DISALLOW_COPY_AND_ASSIGN(Graphics3DImpl);
+};
+
+}  // namespace ppapi
+
+#endif  // PPAPI_SHARED_IMPL_GRAPHICS_3D_IMPL_H_
+