Create new GLSurface for cross process image transport.

content/common/gpu/image_transport_surface_linux.cc

+// 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.
+
+#if defined(ENABLE_GPU)
+
+#include "content/common/gpu/image_transport_surface_linux.h"
+
+// This conflicts with the defines in Xlib.h and must come first.
+#include "content/common/gpu/gpu_messages.h"
+
+#include <map>
+#include <X11/Xlib.h>
+#include <X11/extensions/Xcomposite.h>
+
+#include "base/callback.h"
+#include "content/common/gpu/gpu_channel.h"
+#include "content/common/gpu/gpu_channel_manager.h"
+#include "content/common/gpu/gpu_command_buffer_stub.h"
+#include "gpu/command_buffer/service/gpu_scheduler.h"
+#include "third_party/angle/include/EGL/egl.h"
+#include "third_party/angle/include/EGL/eglext.h"
+#include "ui/gfx/gl/gl_bindings.h"
+#include "ui/gfx/gl/gl_implementation.h"
+#include "ui/gfx/gl/gl_surface_egl.h"
+#include "ui/gfx/gl/gl_surface_glx.h"
+#include "ui/gfx/surface/accelerated_surface_linux.h"
+
+namespace {
+
+// We are backed by an Pbuffer offscreen surface for the purposes of creating a
+// context, but use FBOs to render to X Pixmap backed EGLImages.
+class EGLImageTransportSurface : public ImageTransportSurface,
+                                 public gfx::PbufferGLSurfaceEGL {
+ public:
+  explicit EGLImageTransportSurface(GpuCommandBufferStub* stub);
+
+  // GLSurface implementation
+  virtual bool Initialize() OVERRIDE;
+  virtual void Destroy() OVERRIDE;
+  virtual bool IsOffscreen() OVERRIDE;
+  virtual bool SwapBuffers() OVERRIDE;
+  virtual gfx::Size GetSize() OVERRIDE;
+  virtual void OnMakeCurrent() OVERRIDE;
+  virtual unsigned int GetBackingFrameBufferObject() OVERRIDE;
+
+ protected:
+  // ImageTransportSurface implementation
+  virtual void OnSetSurfaceACK(uint64 surface_id) OVERRIDE;
+  virtual void OnBuffersSwappedACK() OVERRIDE;
+  virtual void Resize(gfx::Size size) OVERRIDE;
+
+ private:
+  virtual ~EGLImageTransportSurface() OVERRIDE;
+  void ReleaseSurface(scoped_refptr<AcceleratedSurface>& surface);
+
+  uint32 fbo_id_;
+  uint32 depth_id_;
+  gfx::Size depth_buffer_size_;
+
+  scoped_refptr<AcceleratedSurface> back_surface_;
+  scoped_refptr<AcceleratedSurface> front_surface_;
+
+  DISALLOW_COPY_AND_ASSIGN(EGLImageTransportSurface);
+};
+
+// We are backed by an Pbuffer offscreen surface for the purposes of creating a
+// context, but use FBOs to render to X Pixmap backed EGLImages.
+class GLXImageTransportSurface : public ImageTransportSurface,
+                                 public gfx::NativeViewGLSurfaceGLX {
+ public:
+  explicit GLXImageTransportSurface(GpuCommandBufferStub* stub);
+
+  // gfx::GLSurface implementation:
+  virtual bool Initialize() OVERRIDE;
+  virtual void Destroy() OVERRIDE;
+  virtual bool SwapBuffers() OVERRIDE;
+  virtual gfx::Size GetSize() OVERRIDE;
+
+ protected:
+  // ImageTransportSurface implementation:
+  void OnSetSurfaceACK(uint64 surface_id) OVERRIDE;
+  void OnBuffersSwappedACK() OVERRIDE;
+  void Resize(gfx::Size size) OVERRIDE;
+
+ private:
+  virtual ~GLXImageTransportSurface();
+
+  // Tell the browser to release the surface.
+  void ReleaseSurface();
+
+  XID dummy_parent_;
+  gfx::Size size_;
+
+  // Whether or not the image has been bound on the browser side.
+  bool bound_;
+
+  DISALLOW_COPY_AND_ASSIGN(GLXImageTransportSurface);
+};
+
+EGLImageTransportSurface::EGLImageTransportSurface(GpuCommandBufferStub* stub) :
+    ImageTransportSurface(stub),
+    gfx::PbufferGLSurfaceEGL(false, gfx::Size(1,1)),
+    fbo_id_(0) {
+}
+
+EGLImageTransportSurface::~EGLImageTransportSurface() {
+}
+
+bool EGLImageTransportSurface::Initialize() {
+  if (!ImageTransportSurface::Initialize())
+    return false;
+  return PbufferGLSurfaceEGL::Initialize();
+}
+
+void EGLImageTransportSurface::Destroy() {
+  if (depth_id_) {
+    glDeleteRenderbuffersEXT(1, &depth_id_);
+    depth_id_ = 0;
+  }
+
+  if (back_surface_.get())
+    ReleaseSurface(back_surface_);
+  if (front_surface_.get())
+    ReleaseSurface(front_surface_);
+
+  ImageTransportSurface::Destroy();
+  PbufferGLSurfaceEGL::Destroy();
+}
+
+bool EGLImageTransportSurface::IsOffscreen() {
+  return false;
+}
+
+void EGLImageTransportSurface::OnMakeCurrent() {
+  if (fbo_id_)
+    return;
+
+  glGenFramebuffersEXT(1, &fbo_id_);
+  glBindFramebufferEXT(GL_FRAMEBUFFER, fbo_id_);
+  Resize(gfx::Size(1,1));
+
+  GLenum status = glCheckFramebufferStatusEXT(GL_FRAMEBUFFER);
+  if (status != GL_FRAMEBUFFER_COMPLETE) {
+    LOG(ERROR) << "Framebuffer incomplete.";
+  }
+}
+
+unsigned int EGLImageTransportSurface::GetBackingFrameBufferObject() {
+  return fbo_id_;
+}
+
+void EGLImageTransportSurface::ReleaseSurface(
+    scoped_refptr<AcceleratedSurface>& surface) {
+  if (surface.get()) {
+    GpuHostMsg_AcceleratedSurfaceRelease_Params params;
+    params.renderer_id = stub()->renderer_id();
+    params.render_view_id = stub()->render_view_id();
+    params.identifier = back_surface_->pixmap();
+    params.route_id = route_id();
+    Send(new GpuHostMsg_AcceleratedSurfaceRelease(params));
+    surface = NULL;
+  }
+}
+
+void EGLImageTransportSurface::Resize(gfx::Size size) {
+  if (back_surface_.get())
+    ReleaseSurface(back_surface_);
+
+  if (depth_id_ && depth_buffer_size_ != size) {
+    glDeleteRenderbuffersEXT(1, &depth_id_);
+    depth_id_ = 0;
+  }
+
+  if (!depth_id_) {
+    glGenRenderbuffersEXT(1, &depth_id_);
+    glBindRenderbufferEXT(GL_RENDERBUFFER, depth_id_);
+    glRenderbufferStorageEXT(GL_RENDERBUFFER,
+                             GL_DEPTH24_STENCIL8,
+                             size.width(),
+                             size.height());
+    glBindRenderbufferEXT(GL_RENDERBUFFER, 0);
+    glFramebufferRenderbufferEXT(GL_FRAMEBUFFER,
+                                 GL_DEPTH_ATTACHMENT,
+                                 GL_RENDERBUFFER,
+                                 depth_id_);
+    depth_buffer_size_ = size;
+  }
+
+  back_surface_ = new AcceleratedSurface(size);
+  glFramebufferTexture2DEXT(GL_FRAMEBUFFER,
+                            GL_COLOR_ATTACHMENT0,
+                            GL_TEXTURE_2D,
+                            back_surface_->texture(),
+                            0);
+  glFlush();
+
+  GpuHostMsg_AcceleratedSurfaceSetIOSurface_Params params;
+  params.renderer_id = stub()->renderer_id();
+  params.render_view_id = stub()->render_view_id();
+  params.width = size.width();
+  params.height = size.height();
+  params.identifier = back_surface_->pixmap();
+  params.route_id = route_id();
+  Send(new GpuHostMsg_AcceleratedSurfaceSetIOSurface(params));
+
+  scheduler()->SetScheduled(false);
+}
+
+bool EGLImageTransportSurface::SwapBuffers() {
+  front_surface_.swap(back_surface_);
+  DCHECK_NE(front_surface_.get(), static_cast<AcceleratedSurface*>(NULL));
+  glFlush();
+
+  GpuHostMsg_AcceleratedSurfaceBuffersSwapped_Params params;
+  params.renderer_id = stub()->renderer_id();
+  params.render_view_id = stub()->render_view_id();
+  params.surface_id = front_surface_->pixmap();
+  params.route_id = route_id();
+  Send(new GpuHostMsg_AcceleratedSurfaceBuffersSwapped(params));
+
+  gfx::Size expected_size = front_surface_->size();
+  if (!back_surface_.get() || back_surface_->size() != expected_size) {
+    Resize(expected_size);
+  } else {
+    glFramebufferTexture2DEXT(GL_FRAMEBUFFER,
+                              GL_COLOR_ATTACHMENT0,
+                              GL_TEXTURE_2D,
+                              back_surface_->texture(),
+                              0);
+  }
+  scheduler()->SetScheduled(false);
+  return true;
+}
+
+gfx::Size EGLImageTransportSurface::GetSize() {
+  return back_surface_->size();
+}
+
+void EGLImageTransportSurface::OnSetSurfaceACK(
+    uint64 surface_id) {
+  DCHECK_EQ(back_surface_->pixmap(), surface_id);
+  scheduler()->SetScheduled(true);
+}
+
+void EGLImageTransportSurface::OnBuffersSwappedACK() {
+  scheduler()->SetScheduled(true);
+}
+
+GLXImageTransportSurface::GLXImageTransportSurface(GpuCommandBufferStub* stub) :
+    ImageTransportSurface(stub),
+    gfx::NativeViewGLSurfaceGLX(),
+    dummy_parent_(0),
+    size_(1, 1),
+    bound_(false) {
+}
+
+GLXImageTransportSurface::~GLXImageTransportSurface() {
+}
+
+bool GLXImageTransportSurface::Initialize() {
+  // Create a dummy window to host the real window.
+  Display* dpy = gfx::GLSurfaceGLX::GetDisplay();
+  XSetWindowAttributes swa;
+  swa.event_mask = StructureNotifyMask;
+  swa.override_redirect = True;
+  dummy_parent_ = XCreateWindow(
+      dpy,
+      RootWindow(dpy, DefaultScreen(dpy)), // parent
+      -100, -100, 1, 1,
+      0, // border width
+      CopyFromParent, // depth
+      InputOutput,
+      CopyFromParent, // visual
+      CWEventMask | CWOverrideRedirect, &swa);
+  XMapWindow(dpy, dummy_parent_);
+
+  swa.event_mask = StructureNotifyMask;
+  swa.override_redirect = false;
+  window_ = XCreateWindow(dpy,
+                          dummy_parent_,
+                          0, 0, size_.width(), size_.height(),
+                          0, // border width
+                          CopyFromParent, // depth
+                          InputOutput,
+                          CopyFromParent, // visual
+                          CWEventMask, &swa);
+  XMapWindow(dpy, window_);
+  while(1) {
+    XEvent event;
+    XNextEvent(dpy, &event);
+    if (event.type == MapNotify && event.xmap.window == window_)
+      break;
+  }
+  // Manual setting must be used to avoid unnecessary rendering by server.
+  XCompositeRedirectWindow(dpy, window_, CompositeRedirectManual);
+  Resize(size_);
+
+  if (!ImageTransportSurface::Initialize())
+    return false;
+  return gfx::NativeViewGLSurfaceGLX::Initialize();
+}
+
+void GLXImageTransportSurface::Destroy() {
+  if (bound_)
+    ReleaseSurface();
+
+  if (window_) {
+    Display* dpy = gfx::GLSurfaceGLX::GetDisplay();
+    XDestroyWindow(dpy, window_);
+    XDestroyWindow(dpy, dummy_parent_);
+  }
+
+  ImageTransportSurface::Destroy();
+  gfx::NativeViewGLSurfaceGLX::Destroy();
+}
+
+void GLXImageTransportSurface::ReleaseSurface() {
+  DCHECK(bound_);
+  GpuHostMsg_AcceleratedSurfaceRelease_Params params;
+  params.renderer_id = stub()->renderer_id();
+  params.render_view_id = stub()->render_view_id();
+  params.identifier = window_;
+  params.route_id = route_id();
+  Send(new GpuHostMsg_AcceleratedSurfaceRelease(params));
+}
+
+void GLXImageTransportSurface::Resize(gfx::Size size) {
+  size_ = size;
+  if (bound_) {
+    ReleaseSurface();
+    bound_ = false;
+  }
+
+  Display* dpy = gfx::GLSurfaceGLX::GetDisplay();
+  XResizeWindow(dpy, window_, size_.width(), size_.height());
+  XFlush(dpy);
+
+  GpuHostMsg_AcceleratedSurfaceSetIOSurface_Params params;
+  params.renderer_id = stub()->renderer_id();
+  params.render_view_id = stub()->render_view_id();
+  params.width = size_.width();
+  params.height = size_.height();
+  params.identifier = window_;
+  params.route_id = route_id();
+  Send(new GpuHostMsg_AcceleratedSurfaceSetIOSurface(params));
+
+  scheduler()->SetScheduled(false);
+}
+
+bool GLXImageTransportSurface::SwapBuffers() {
+  gfx::NativeViewGLSurfaceGLX::SwapBuffers();
+  glFlush();
+
+  GpuHostMsg_AcceleratedSurfaceBuffersSwapped_Params params;
+  params.renderer_id = stub()->renderer_id();
+  params.render_view_id = stub()->render_view_id();
+  params.surface_id = window_;
+  params.route_id = route_id();
+  Send(new GpuHostMsg_AcceleratedSurfaceBuffersSwapped(params));
+
+  return true;
+}
+
+gfx::Size GLXImageTransportSurface::GetSize() {
+  return size_;
+}
+
+void GLXImageTransportSurface::OnSetSurfaceACK(
+    uint64 surface_id) {
+  DCHECK(!bound_);
+  bound_ = true;
+  scheduler()->SetScheduled(true);
+}
+
+void GLXImageTransportSurface::OnBuffersSwappedACK() {
+}
+
+}  // namespace
+
+ImageTransportSurface::ImageTransportSurface(GpuCommandBufferStub* stub) :
+    stub_(stub) {
+  GpuChannelManager* gpu_channel_manager
+      = stub_->channel()->gpu_channel_manager();
+  route_id_ = gpu_channel_manager->GenerateRouteID();
+  gpu_channel_manager->AddRoute(route_id_, this);
+}
+
+ImageTransportSurface::~ImageTransportSurface() {
+  GpuChannelManager* gpu_channel_manager
+      = stub_->channel()->gpu_channel_manager();
+  gpu_channel_manager->RemoveRoute(route_id_);
+}
+
+bool ImageTransportSurface::Initialize() {
+  scheduler()->SetResizeCallback(
+     NewCallback(this, &ImageTransportSurface::Resize));
+  return true;
+}
+
+void ImageTransportSurface::Destroy() {
+  scheduler()->SetResizeCallback(NULL);
+}
+
+bool ImageTransportSurface::OnMessageReceived(const IPC::Message& message) {
+  bool handled = true;
+  IPC_BEGIN_MESSAGE_MAP(ImageTransportSurface, message)
+    IPC_MESSAGE_HANDLER(AcceleratedSurfaceMsg_SetSurfaceACK,
+                        OnSetSurfaceACK)
+    IPC_MESSAGE_HANDLER(AcceleratedSurfaceMsg_BuffersSwappedACK,
+                        OnBuffersSwappedACK)
+    IPC_MESSAGE_UNHANDLED(handled = false)
+  IPC_END_MESSAGE_MAP()
+  return handled;
+}
+
+bool ImageTransportSurface::Send(IPC::Message* message) {
+  GpuChannelManager* gpu_channel_manager =
+      stub_->channel()->gpu_channel_manager();
+  return gpu_channel_manager->Send(message);
+}
+
+gpu::GpuScheduler* ImageTransportSurface::scheduler() {
+  return stub_->scheduler();
+}
+
+// static
+scoped_refptr<gfx::GLSurface> ImageTransportSurface::CreateSurface(
+    GpuCommandBufferStub* stub) {
+  scoped_refptr<gfx::GLSurface> surface;
+  switch (gfx::GetGLImplementation()) {
+    case gfx::kGLImplementationDesktopGL:
+      surface = new GLXImageTransportSurface(stub);
+      break;
+    case gfx::kGLImplementationEGLGLES2:
+      surface = new EGLImageTransportSurface(stub);
+      break;
+    default:
+      NOTREACHED();
+      return NULL;
+  }
+  if (surface->Initialize())
+    return surface;
+  else
+    return NULL;
+}
+
+#endif  // defined(USE_GPU)