Make GPU back-pressure work with remote CALayers

content/common/gpu/image_transport_surface_fbo_mac.cc

Index: content/common/gpu/image_transport_surface_fbo_mac.cc
diff --git a/content/common/gpu/image_transport_surface_fbo_mac.cc b/content/common/gpu/image_transport_surface_fbo_mac.cc
deleted file mode 100644
index 3e86a484fe9d0ce87b4168c1fbdc9356c2e3c681..0000000000000000000000000000000000000000
--- a/content/common/gpu/image_transport_surface_fbo_mac.cc
+++ /dev/null
@@ -1,349 +0,0 @@
-// Copyright 2014 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 "content/common/gpu/image_transport_surface_fbo_mac.h"
-
-#include "content/common/gpu/gpu_messages.h"
-#include "content/common/gpu/image_transport_surface_iosurface_mac.h"
-#include "ui/gfx/native_widget_types.h"
-#include "ui/gl/gl_context.h"
-#include "ui/gl/gl_implementation.h"
-#include "ui/gl/gl_surface_osmesa.h"
-
-namespace content {
-
-ImageTransportSurfaceFBO::ImageTransportSurfaceFBO(
-    StorageProvider* storage_provider,
-    GpuChannelManager* manager,
-    GpuCommandBufferStub* stub,
-    gfx::PluginWindowHandle handle)
-    : storage_provider_(storage_provider),
-      backbuffer_suggested_allocation_(true),
-      frontbuffer_suggested_allocation_(true),
-      fbo_id_(0),
-      texture_id_(0),
-      depth_stencil_renderbuffer_id_(0),
-      has_complete_framebuffer_(false),
-      context_(NULL),
-      scale_factor_(1.f),
-      made_current_(false),
-      is_swap_buffers_pending_(false),
-      did_unschedule_(false) {
-  helper_.reset(new ImageTransportHelper(this, manager, stub, handle));
-}
-
-ImageTransportSurfaceFBO::~ImageTransportSurfaceFBO() {
-}
-
-bool ImageTransportSurfaceFBO::Initialize() {
-  // Only support IOSurfaces if the GL implementation is the native desktop GL.
-  // IO surfaces will not work with, for example, OSMesa software renderer
-  // GL contexts.
-  if (gfx::GetGLImplementation() != gfx::kGLImplementationDesktopGL &&
-      gfx::GetGLImplementation() != gfx::kGLImplementationAppleGL)
-    return false;
-
-  if (!helper_->Initialize())
-    return false;
-
-  helper_->stub()->AddDestructionObserver(this);
-  return true;
-}
-
-void ImageTransportSurfaceFBO::Destroy() {
-  DestroyFramebuffer();
-
-  helper_->Destroy();
-}
-
-bool ImageTransportSurfaceFBO::DeferDraws() {
-  // The command buffer hit a draw/clear command that could clobber the
-  // IOSurface in use by an earlier SwapBuffers. If a Swap is pending, abort
-  // processing of the command by returning true and unschedule until the Swap
-  // Ack arrives.
-  if(did_unschedule_)
-    return true;  // Still unscheduled, so just return true.
-  if (is_swap_buffers_pending_) {
-    did_unschedule_ = true;
-    helper_->SetScheduled(false);
-    return true;
-  }
-  return false;
-}
-
-bool ImageTransportSurfaceFBO::IsOffscreen() {
-  return false;
-}
-
-bool ImageTransportSurfaceFBO::OnMakeCurrent(gfx::GLContext* context) {
-  context_ = context;
-
-  if (made_current_)
-    return true;
-
-  OnResize(gfx::Size(1, 1), 1.f);
-
-  made_current_ = true;
-  return true;
-}
-
-unsigned int ImageTransportSurfaceFBO::GetBackingFrameBufferObject() {
-  return fbo_id_;
-}
-
-bool ImageTransportSurfaceFBO::SetBackbufferAllocation(bool allocation) {
-  if (backbuffer_suggested_allocation_ == allocation)
-    return true;
-  backbuffer_suggested_allocation_ = allocation;
-  AdjustBufferAllocation();
-  return true;
-}
-
-void ImageTransportSurfaceFBO::SetFrontbufferAllocation(bool allocation) {
-  if (frontbuffer_suggested_allocation_ == allocation)
-    return;
-  frontbuffer_suggested_allocation_ = allocation;
-  AdjustBufferAllocation();
-}
-
-void ImageTransportSurfaceFBO::AdjustBufferAllocation() {
-  // On mac, the frontbuffer and backbuffer are the same buffer. The buffer is
-  // free'd when both the browser and gpu processes have Unref'd the IOSurface.
-  if (!backbuffer_suggested_allocation_ &&
-      !frontbuffer_suggested_allocation_ &&
-      has_complete_framebuffer_) {
-    DestroyFramebuffer();
-    helper_->Suspend();
-  } else if (backbuffer_suggested_allocation_ && !has_complete_framebuffer_) {
-    CreateFramebuffer();
-  }
-}
-
-bool ImageTransportSurfaceFBO::SwapBuffers() {
-  DCHECK(backbuffer_suggested_allocation_);
-  if (!frontbuffer_suggested_allocation_)
-    return true;
-  glFlush();
-
-  GpuHostMsg_AcceleratedSurfaceBuffersSwapped_Params params;
-  params.surface_handle = storage_provider_->GetSurfaceHandle();
-  params.size = GetSize();
-  params.scale_factor = scale_factor_;
-  params.latency_info.swap(latency_info_);
-  helper_->SendAcceleratedSurfaceBuffersSwapped(params);
-
-  DCHECK(!is_swap_buffers_pending_);
-  is_swap_buffers_pending_ = true;
-
-  storage_provider_->WillSwapBuffers();
-  return true;
-}
-
-bool ImageTransportSurfaceFBO::PostSubBuffer(
-    int x, int y, int width, int height) {
-  DCHECK(backbuffer_suggested_allocation_);
-  if (!frontbuffer_suggested_allocation_)
-    return true;
-  glFlush();
-
-  GpuHostMsg_AcceleratedSurfacePostSubBuffer_Params params;
-  params.surface_handle = storage_provider_->GetSurfaceHandle();
-  params.x = x;
-  params.y = y;
-  params.width = width;
-  params.height = height;
-  params.surface_size = GetSize();
-  params.surface_scale_factor = scale_factor_;
-  params.latency_info.swap(latency_info_);
-  helper_->SendAcceleratedSurfacePostSubBuffer(params);
-
-  DCHECK(!is_swap_buffers_pending_);
-  is_swap_buffers_pending_ = true;
-
-  storage_provider_->WillSwapBuffers();
-  return true;
-}
-
-bool ImageTransportSurfaceFBO::SupportsPostSubBuffer() {
-  return true;
-}
-
-gfx::Size ImageTransportSurfaceFBO::GetSize() {
-  return size_;
-}
-
-void* ImageTransportSurfaceFBO::GetHandle() {
-  return NULL;
-}
-
-void* ImageTransportSurfaceFBO::GetDisplay() {
-  return NULL;
-}
-
-void ImageTransportSurfaceFBO::OnBufferPresented(
-    const AcceleratedSurfaceMsg_BufferPresented_Params& params) {
-  DCHECK(is_swap_buffers_pending_);
-
-  context_->share_group()->SetRendererID(params.renderer_id);
-  is_swap_buffers_pending_ = false;
-  if (did_unschedule_) {
-    did_unschedule_ = false;
-    helper_->SetScheduled(true);
-  }
-}
-
-void ImageTransportSurfaceFBO::OnResize(gfx::Size size,
-                                        float scale_factor) {
-  // This trace event is used in gpu_feature_browsertest.cc - the test will need
-  // to be updated if this event is changed or moved.
-  TRACE_EVENT2("gpu", "ImageTransportSurfaceFBO::OnResize",
-               "old_width", size_.width(), "new_width", size.width());
-  // Caching |context_| from OnMakeCurrent. It should still be current.
-  DCHECK(context_->IsCurrent(this));
-
-  size_ = size;
-  scale_factor_ = scale_factor;
-
-  CreateFramebuffer();
-}
-
-void ImageTransportSurfaceFBO::SetLatencyInfo(
-    const std::vector<ui::LatencyInfo>& latency_info) {
-  for (size_t i = 0; i < latency_info.size(); i++)
-    latency_info_.push_back(latency_info[i]);
-}
-
-void ImageTransportSurfaceFBO::WakeUpGpu() {
-  NOTIMPLEMENTED();
-}
-
-void ImageTransportSurfaceFBO::OnWillDestroyStub() {
-  helper_->stub()->RemoveDestructionObserver(this);
-  Destroy();
-}
-
-void ImageTransportSurfaceFBO::DestroyFramebuffer() {
-  // If we have resources to destroy, then make sure that we have a current
-  // context which we can use to delete the resources.
-  if (context_ || fbo_id_ || texture_id_ || depth_stencil_renderbuffer_id_) {
-    DCHECK(gfx::GLContext::GetCurrent() == context_);
-    DCHECK(context_->IsCurrent(this));
-    DCHECK(CGLGetCurrentContext());
-  }
-
-  if (fbo_id_) {
-    glDeleteFramebuffersEXT(1, &fbo_id_);
-    fbo_id_ = 0;
-  }
-
-  if (texture_id_) {
-    glDeleteTextures(1, &texture_id_);
-    texture_id_ = 0;
-  }
-
-  if (depth_stencil_renderbuffer_id_) {
-    glDeleteRenderbuffersEXT(1, &depth_stencil_renderbuffer_id_);
-    depth_stencil_renderbuffer_id_ = 0;
-  }
-
-  storage_provider_->FreeColorBufferStorage();
-
-  has_complete_framebuffer_ = false;
-}
-
-void ImageTransportSurfaceFBO::CreateFramebuffer() {
-  gfx::Size new_rounded_size = storage_provider_->GetRoundedSize(size_);
-
-  // Only recreate surface when the rounded up size has changed.
-  if (has_complete_framebuffer_ && new_rounded_size == rounded_size_)
-    return;
-
-  // This trace event is used in gpu_feature_browsertest.cc - the test will need
-  // to be updated if this event is changed or moved.
-  TRACE_EVENT2("gpu", "ImageTransportSurfaceFBO::CreateFramebuffer",
-               "width", new_rounded_size.width(),
-               "height", new_rounded_size.height());
-
-  rounded_size_ = new_rounded_size;
-
-  // GL_TEXTURE_RECTANGLE_ARB is the best supported render target on
-  // Mac OS X and is required for IOSurface interoperability.
-  GLint previous_texture_id = 0;
-  glGetIntegerv(GL_TEXTURE_BINDING_RECTANGLE_ARB, &previous_texture_id);
-
-  // Free the old IO Surface first to reduce memory fragmentation.
-  DestroyFramebuffer();
-
-  glGenFramebuffersEXT(1, &fbo_id_);
-  glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, fbo_id_);
-
-  glGenTextures(1, &texture_id_);
-
-  glBindTexture(GL_TEXTURE_RECTANGLE_ARB, texture_id_);
-  glTexParameteri(GL_TEXTURE_RECTANGLE_ARB, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
-  glTexParameteri(GL_TEXTURE_RECTANGLE_ARB, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
-  glTexParameteri(GL_TEXTURE_RECTANGLE_ARB,
-                  GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
-  glTexParameteri(GL_TEXTURE_RECTANGLE_ARB,
-                  GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
-
-  glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT,
-                            GL_COLOR_ATTACHMENT0_EXT,
-                            GL_TEXTURE_RECTANGLE_ARB,
-                            texture_id_,
-                            0);
-
-  // Search through the provided attributes; if the caller has
-  // requested a stencil buffer, try to get one.
-
-  int32 stencil_bits =
-      helper_->stub()->GetRequestedAttribute(EGL_STENCIL_SIZE);
-  if (stencil_bits > 0) {
-    // Create and bind the stencil buffer
-    bool has_packed_depth_stencil =
-         GLSurface::ExtensionsContain(
-             reinterpret_cast<const char *>(glGetString(GL_EXTENSIONS)),
-                                            "GL_EXT_packed_depth_stencil");
-
-    if (has_packed_depth_stencil) {
-      glGenRenderbuffersEXT(1, &depth_stencil_renderbuffer_id_);
-      glBindRenderbufferEXT(GL_RENDERBUFFER_EXT,
-                            depth_stencil_renderbuffer_id_);
-      glRenderbufferStorageEXT(GL_RENDERBUFFER_EXT, GL_DEPTH24_STENCIL8_EXT,
-                              rounded_size_.width(), rounded_size_.height());
-      glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT,
-                                  GL_STENCIL_ATTACHMENT_EXT,
-                                  GL_RENDERBUFFER_EXT,
-                                  depth_stencil_renderbuffer_id_);
-    }
-
-    // If we asked for stencil but the extension isn't present,
-    // it's OK to silently fail; subsequent code will/must check
-    // for the presence of a stencil buffer before attempting to
-    // do stencil-based operations.
-  }
-
-  bool allocated_color_buffer = storage_provider_->AllocateColorBufferStorage(
-      static_cast<CGLContextObj>(context_->GetHandle()), texture_id_,
-      rounded_size_, scale_factor_);
-  if (!allocated_color_buffer) {
-    DLOG(ERROR) << "Failed to allocate color buffer storage.";
-    DestroyFramebuffer();
-    return;
-  }
-
-  GLenum status = glCheckFramebufferStatusEXT(GL_FRAMEBUFFER_EXT);
-  if (status != GL_FRAMEBUFFER_COMPLETE_EXT) {
-    DLOG(ERROR) << "Framebuffer was incomplete: " << status;
-    DestroyFramebuffer();
-    return;
-  }
-
-  has_complete_framebuffer_ = true;
-
-  glBindTexture(GL_TEXTURE_RECTANGLE_ARB, previous_texture_id);
-  // The FBO remains bound for this GL context.
-}
-
-}  // namespace content