Move PlatformContext3DImpl to separate file

chrome/renderer/pepper_platform_context_3d_impl.cc

+// Copyright (c) 2010 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 "chrome/renderer/pepper_platform_context_3d_impl.h"
+
+#include "chrome/renderer/ggl/ggl.h"
+#include "chrome/renderer/gpu_channel_host.h"
+#include "chrome/renderer/render_thread.h"
+
+#ifdef ENABLE_GPU
+PlatformContext3DImpl::PlatformContext3DImpl(ggl::Context* parent_context)
+  : parent_context_(parent_context),
+  context_(NULL) {
+}
+
+PlatformContext3DImpl::~PlatformContext3DImpl() {
+  if (context_) {
+    ggl::DestroyContext(context_);
+    context_ = NULL;
+  }
+}
+
+bool PlatformContext3DImpl::Init() {
+  // Ignore initializing more than once.
+  if (context_)
+    return true;
+
+  RenderThread* render_thread = RenderThread::current();
+  if (!render_thread)
+    return false;
+
+  GpuChannelHost* host = render_thread->GetGpuChannel();
+  if (!host)
+    return false;
+
+  DCHECK(host->state() == GpuChannelHost::kConnected);
+
+  // TODO(apatrick): Let Pepper plugins configure their back buffer surface.
+  static const int32 attribs[] = {
+    ggl::GGL_ALPHA_SIZE, 8,
+    ggl::GGL_DEPTH_SIZE, 24,
+    ggl::GGL_STENCIL_SIZE, 8,
+    ggl::GGL_SAMPLES, 0,
+    ggl::GGL_SAMPLE_BUFFERS, 0,
+    ggl::GGL_NONE,
+  };
+
+  // TODO(apatrick): Decide which extensions to expose to Pepper plugins.
+  // Currently they get only core GLES2.
+  context_ = ggl::CreateOffscreenContext(host,
+                                         parent_context_,
+                                         gfx::Size(1, 1),
+                                         "",
+                                         attribs);
+  if (!context_)
+    return false;
+
+  return true;
+}
+
+bool PlatformContext3DImpl::SwapBuffers() {
+  DCHECK(context_);
+  return ggl::SwapBuffers(context_);
+}
+
+unsigned PlatformContext3DImpl::GetError() {
+  DCHECK(context_);
+  return ggl::GetError(context_);
+}
+
+void PlatformContext3DImpl::ResizeBackingTexture(const gfx::Size& size) {
+  DCHECK(context_);
+  ggl::ResizeOffscreenContext(context_, size);
+}
+
+void PlatformContext3DImpl::SetSwapBuffersCallback(Callback0::Type* callback) {
+  DCHECK(context_);
+  ggl::SetSwapBuffersCallback(context_, callback);
+}
+
+unsigned PlatformContext3DImpl::GetBackingTextureId() {
+  DCHECK(context_);
+  return ggl::GetParentTextureId(context_);
+}
+
+gpu::gles2::GLES2Implementation*
+    PlatformContext3DImpl::GetGLES2Implementation() {
+  DCHECK(context_);
+  return ggl::GetImplementation(context_);
+}
+
+#endif  // ENABLE_GPU
+