Consolidate OutputSurface constructors into GL vs Vulkan.

content/renderer/gpu/mailbox_output_surface.cc

Index: content/renderer/gpu/mailbox_output_surface.cc
diff --git a/content/renderer/gpu/mailbox_output_surface.cc b/content/renderer/gpu/mailbox_output_surface.cc
index 4d90944759b1679fcbb90c3def67456d515fad26..de748e813929c322f9f905bd2f660858102044af 100644
--- a/content/renderer/gpu/mailbox_output_surface.cc
+++ b/content/renderer/gpu/mailbox_output_surface.cc
@@ -8,9 +8,13 @@
 #include "cc/output/compositor_frame.h"
 #include "cc/output/compositor_frame_ack.h"
 #include "cc/output/gl_frame_data.h"
+#include "cc/output/managed_memory_policy.h"
+#include "cc/output/output_surface_client.h"
 #include "cc/resources/resource_provider.h"
 #include "content/renderer/gpu/frame_swap_message_queue.h"
+#include "gpu/command_buffer/client/context_support.h"
 #include "gpu/command_buffer/client/gles2_interface.h"
+#include "gpu/command_buffer/common/gpu_memory_allocation.h"
 #include "third_party/khronos/GLES2/gl2.h"
 #include "third_party/khronos/GLES2/gl2ext.h"
 
@@ -23,28 +27,35 @@ using gpu::gles2::GLES2Interface;
 namespace content {
 
 MailboxOutputSurface::MailboxOutputSurface(
-    int32_t routing_id,
     uint32_t output_surface_id,
-    const scoped_refptr<ContextProviderCommandBuffer>& context_provider,
-    const scoped_refptr<ContextProviderCommandBuffer>& worker_context_provider,
-    scoped_refptr<FrameSwapMessageQueue> swap_frame_message_queue,
-    cc::ResourceFormat format)
-    : CompositorOutputSurface(routing_id,
-                              output_surface_id,
-                              context_provider,
-                              worker_context_provider,
-                              nullptr,
-                              nullptr,
-                              swap_frame_message_queue,
-                              true),
+    scoped_refptr<cc::ContextProvider> context_provider,
+    scoped_refptr<cc::ContextProvider> worker_context_provider)
+    : cc::OutputSurface(std::move(context_provider),
+                        std::move(worker_context_provider),
+                        nullptr),
+      output_surface_id_(output_surface_id),
       fbo_(0),
       is_backbuffer_discarded_(false),
-      format_(format) {
+      weak_ptrs_(this) {
   pending_textures_.push_back(TransferableFrame());
   capabilities_.uses_default_gl_framebuffer = false;
 }
 
-MailboxOutputSurface::~MailboxOutputSurface() {}
+MailboxOutputSurface::~MailboxOutputSurface() = default;
+
+bool MailboxOutputSurface::BindToClient(cc::OutputSurfaceClient* client) {
+  if (!cc::OutputSurface::BindToClient(client))
+    return false;
+
+  if (!context_provider()) {
+    // Without a GPU context, the memory policy otherwise wouldn't be set.
+    client->SetMemoryPolicy(cc::ManagedMemoryPolicy(
+        128 * 1024 * 1024, gpu::MemoryAllocation::CUTOFF_ALLOW_NICE_TO_HAVE,
+        base::SharedMemory::GetHandleLimit() / 3));
+  }
+
+  return true;
+}
 
 void MailboxOutputSurface::DetachFromClient() {
   DiscardBackbuffer();
@@ -87,14 +98,9 @@ void MailboxOutputSurface::EnsureBackbuffer() {
       gl->TexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
       gl->TexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
       gl->TexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
-      gl->TexImage2D(GL_TEXTURE_2D,
-                     0,
-                     GLInternalFormat(format_),
-                     surface_size_.width(),
-                     surface_size_.height(),
-                     0,
-                     GLDataFormat(format_),
-                     GLDataType(format_),
+      gl->TexImage2D(GL_TEXTURE_2D, 0, GLInternalFormat(cc::RGBA_8888),
+                     surface_size_.width(), surface_size_.height(), 0,
+                     GLDataFormat(cc::RGBA_8888), GLDataType(cc::RGBA_8888),
                      NULL);
       gl->GenMailboxCHROMIUM(current_backing_.mailbox.name);
       gl->ProduceTextureCHROMIUM(GL_TEXTURE_2D, current_backing_.mailbox.name);
@@ -157,10 +163,9 @@ void MailboxOutputSurface::OnSwapAck(uint32_t output_surface_id,
                                      const cc::CompositorFrameAck& ack) {
   // Ignore message if it's a stale one coming from a different output surface
   // (e.g. after a lost context).
-  if (output_surface_id != output_surface_id_) {
-    CompositorOutputSurface::OnSwapAck(output_surface_id, ack);
+  if (output_surface_id != output_surface_id_)
     return;
-  }
+
   if (!ack.gl_frame_data->mailbox.IsZero()) {
     DCHECK(!ack.gl_frame_data->size.IsEmpty());
     // The browser could be returning the oldest or any other pending texture
@@ -195,10 +200,36 @@ void MailboxOutputSurface::OnSwapAck(uint32_t output_surface_id,
       context_provider_->ContextGL()->DeleteTextures(1, &texture_id);
     pending_textures_.pop_front();
   }
-  CompositorOutputSurface::OnSwapAck(output_surface_id, ack);
+
+  ReclaimResources(&ack);
+  client_->DidSwapBuffersComplete();
+}
+
+void MailboxOutputSurface::ShortcutSwapAck(
+    uint32_t output_surface_id,
+    std::unique_ptr<cc::GLFrameData> gl_frame_data) {
+  if (!previous_frame_ack_) {
+    previous_frame_ack_.reset(new cc::CompositorFrameAck);
+    previous_frame_ack_->gl_frame_data.reset(new cc::GLFrameData);
+  }
+
+  OnSwapAck(output_surface_id, *previous_frame_ack_);
+
+  previous_frame_ack_->gl_frame_data = std::move(gl_frame_data);
 }
 
 void MailboxOutputSurface::SwapBuffers(cc::CompositorFrame* frame) {
+  // This class is here to support layout tests that are currently
+  // doing a readback in the renderer instead of the browser. So they
+  // are using deprecated code paths in the renderer and don't need to
+  // actually swap anything to the browser. We shortcut the swap to the
+  // browser here and just ack directly within the renderer process.
+  // Once crbug.com/311404 is fixed, this can be removed.
+
+  // This would indicate that crbug.com/311404 is being fixed, and this
+  // block needs to be removed.
+  DCHECK(!frame->delegated_frame_data);
+
   DCHECK(frame->gl_frame_data);
   DCHECK(!surface_size_.IsEmpty());
   DCHECK(surface_size_ == current_backing_.size);
@@ -213,19 +244,21 @@ void MailboxOutputSurface::SwapBuffers(cc::CompositorFrame* frame) {
 
   const GLuint64 fence_sync = gl->InsertFenceSyncCHROMIUM();
   gl->Flush();
-
   gl->GenSyncTokenCHROMIUM(fence_sync,
                            frame->gl_frame_data->sync_token.GetData());
 
-  CompositorOutputSurface::SwapBuffers(frame);
+  // Copy the |sync_token| out of the GLFrameData before moving it into the
+  // closure.
+  gpu::SyncToken sync_token = frame->gl_frame_data->sync_token;
+  context_provider()->ContextSupport()->SignalSyncToken(
+      sync_token, base::Bind(&MailboxOutputSurface::ShortcutSwapAck,
+                             weak_ptrs_.GetWeakPtr(), output_surface_id_,
+                             base::Passed(&frame->gl_frame_data)));
 
   pending_textures_.push_back(current_backing_);
   current_backing_ = TransferableFrame();
-}
 
-size_t MailboxOutputSurface::GetNumAcksPending() {
-  DCHECK(pending_textures_.size());
-  return pending_textures_.size() - 1;
+  client_->DidSwapBuffers();
 }
 
 MailboxOutputSurface::TransferableFrame::TransferableFrame() : texture_id(0) {}