Add the DelegatingRenderer class with its initialize path.

cc/delegating_renderer.cc

Index: cc/delegating_renderer.cc
diff --git a/cc/delegating_renderer.cc b/cc/delegating_renderer.cc
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index 0000000000000000000000000000000000000000..fb76922e6e4fb198d7a1098a26e63e04aba37df2
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+++ b/cc/delegating_renderer.cc
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+/*
+ * Copyright (C) 2012 Google Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1.  Redistributions of source code must retain the above copyright
+ *     notice, this list of conditions and the following disclaimer.
+ * 2.  Redistributions in binary form must reproduce the above copyright
+ *     notice, this list of conditions and the following disclaimer in the
+ *     documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "cc/delegating_renderer.h"
+
+#include <set>
+#include <string>
+#include <vector>
+
+#include "base/debug/trace_event.h"
+#include "base/string_split.h"
+#include "base/string_util.h"
+#include "cc/checkerboard_draw_quad.h"
+#include "cc/compositor_frame_ack.h"
+#include "cc/debug_border_draw_quad.h"
+#include "cc/render_pass.h"
+#include "cc/render_pass_draw_quad.h"
+#include "cc/resource_provider.h"
+#include "cc/solid_color_draw_quad.h"
+#include "cc/texture_draw_quad.h"
+#include "cc/tile_draw_quad.h"
+#include "cc/yuv_video_draw_quad.h"
+#include "third_party/khronos/GLES2/gl2ext.h"
+
+using WebKit::WebGraphicsContext3D;
+
+namespace cc {
+
+scoped_ptr<DelegatingRenderer> DelegatingRenderer::Create(
+    RendererClient* client, ResourceProvider* resource_provider) {
+  scoped_ptr<DelegatingRenderer> renderer(
+      new DelegatingRenderer(client, resource_provider));
+  if (!renderer->Initialize())
+    return scoped_ptr<DelegatingRenderer>();
+  return renderer.Pass();
+}
+
+DelegatingRenderer::DelegatingRenderer(
+    RendererClient* client, ResourceProvider* resource_provider)
+    : Renderer(client),
+      resource_provider_(resource_provider),
+      visible_(true) {
+  DCHECK(resource_provider_);
+}
+
+bool DelegatingRenderer::Initialize() {
+  capabilities_.usingPartialSwap = false;
+  // TODO(danakj): Throttling - we may want to only allow 1 outstanding frame,
+  // but the parent compositor may pipeline for us.
+  // TODO(danakj): Can we use this in single-thread mode?
+  capabilities_.usingSwapCompleteCallback = true;
+  capabilities_.maxTextureSize = resource_provider_->maxTextureSize();
+  capabilities_.bestTextureFormat = resource_provider_->bestTextureFormat();
+  capabilities_.allowPartialTextureUpdates = false;
+
+  WebGraphicsContext3D* context3d = resource_provider_->graphicsContext3D();
+
+  if (!context3d) {
+    // Software compositing.
+    return true;
+  }
+
+  if (!context3d->makeContextCurrent())
+    return false;
+
+  context3d->setContextLostCallback(this);
+  context3d->pushGroupMarkerEXT("CompositorContext");
+
+  std::string extensionsString =
+      UTF16ToASCII(context3d->getString(GL_EXTENSIONS));
+
+  std::vector<std::string> extensions;
+  base::SplitString(extensionsString, ' ', &extensions);
+
+  // TODO(danakj): We need non-GPU-specific paths for these things. This
+  // renderer shouldn't need to use context3d extensions directly.
+  bool hasReadBGRA = true;
+  bool hasSetVisibility = true;
+  bool hasIOSurface = true;
+  bool hasARBTextureRect = true;
+  bool hasGpuMemoryManager = true;
+  bool hasEGLImage = true;
+  for (size_t i = 0; i < extensions.size(); ++i) {
+    if (extensions[i] == "GL_EXT_read_format_bgra")
+      hasReadBGRA = true;
+    else if (extensions[i] == "GL_CHROMIUM_set_visibility")
+      hasSetVisibility = true;
+    else if (extensions[i] == "GL_CHROMIUM_iosurface")
+      hasIOSurface = true;
+    else if (extensions[i] == "GL_ARB_texture_rectangle")
+      hasARBTextureRect = true;
+    else if (extensions[i] == "GL_CHROMIUM_gpu_memory_manager")
+      hasGpuMemoryManager = true;
+    else if (extensions[i] == "GL_OES_EGL_image_external")
+      hasEGLImage = true;
+  }
+
+  if (hasIOSurface)
+    DCHECK(hasARBTextureRect);
+
+  capabilities_.usingAcceleratedPainting =
+      settings().acceleratePainting &&
+      capabilities_.bestTextureFormat == GL_BGRA_EXT &&
+      hasReadBGRA;
+
+  // TODO(piman): loop visibility to GPU process?
+  capabilities_.usingSetVisibility = hasSetVisibility;
+
+  // TODO(danakj): Support GpuMemoryManager.
+  capabilities_.usingGpuMemoryManager = false;
+
+  capabilities_.usingEglImage = hasEGLImage;
+
+  return true;
+}
+
+DelegatingRenderer::~DelegatingRenderer() {
+  WebGraphicsContext3D* context3d = resource_provider_->graphicsContext3D();
+  if (context3d)
+    context3d->setContextLostCallback(NULL);
+}
+
+const RendererCapabilities& DelegatingRenderer::capabilities() const {
+  return capabilities_;
+}
+
+void DelegatingRenderer::drawFrame(RenderPassList& render_passes_in_draw_order,
+                                   RenderPassIdHashMap& render_passes_by_id) {
+  TRACE_EVENT0("cc", "DelegatingRenderer::drawFrame");
+  NOTIMPLEMENTED();
+}
+
+bool DelegatingRenderer::swapBuffers() {
+  return true;
+}
+
+void DelegatingRenderer::getFramebufferPixels(void *pixels,
+                                              const gfx::Rect& rect) {
+  NOTIMPLEMENTED();
+}
+
+void DelegatingRenderer::receiveCompositorFrameAck(
+    const CompositorFrameAck& ack) {
+  resource_provider_->receiveFromParent(ack.resources);
+  m_client->onSwapBuffersComplete();
+}
+
+
+bool DelegatingRenderer::isContextLost() {
+  WebGraphicsContext3D* context3d = resource_provider_->graphicsContext3D();
+  if (!context3d)
+    return false;
+  return context3d->getGraphicsResetStatusARB() != GL_NO_ERROR;
+}
+
+void DelegatingRenderer::setVisible(bool visible) {
+  visible_ = visible;
+}
+
+void DelegatingRenderer::onContextLost() {
+  m_client->didLoseOutputSurface();
+}
+
+}  // namespace cc