content/browser/android/in_process/synchronous_compositor_output_surface.cc

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "content/browser/android/in_process/synchronous_compositor_output_surface.h"
   6
   7 #include "base/auto_reset.h"
   8 #include "base/logging.h"
   9 #include "cc/output/compositor_frame.h"
  10 #include "cc/output/context_provider.h"
  11 #include "cc/output/output_surface_client.h"
  12 #include "cc/output/software_output_device.h"
  13 #include "content/browser/android/in_process/synchronous_compositor_external_begin_frame_source.h"
  14 #include "content/browser/android/in_process/synchronous_compositor_impl.h"
  15 #include "content/browser/android/in_process/synchronous_compositor_registry.h"
  16 #include "content/browser/gpu/compositor_util.h"
  17 #include "content/public/browser/browser_thread.h"
  18 #include "content/renderer/gpu/frame_swap_message_queue.h"
  19 #include "gpu/command_buffer/client/gles2_interface.h"
  20 #include "gpu/command_buffer/common/gpu_memory_allocation.h"
  21 #include "third_party/skia/include/core/SkCanvas.h"
  22 #include "ui/gfx/geometry/rect_conversions.h"
  23 #include "ui/gfx/skia_util.h"
  24 #include "ui/gfx/transform.h"
  25
  26 namespace content {
  27
  28 namespace {
  29
  30 // Do not limit number of resources, so use an unrealistically high value.
  31 const size_t kNumResourcesLimit = 10 * 1000 * 1000;
  32
  33 } // namespace
  34
  35 class SynchronousCompositorOutputSurface::SoftwareDevice
  36   : public cc::SoftwareOutputDevice {
  37  public:
  38   SoftwareDevice(SynchronousCompositorOutputSurface* surface)
  39     : surface_(surface) {
  40   }
  41   virtual void Resize(const gfx::Size& pixel_size,
  42                       float scale_factor) override {
  43     // Intentional no-op: canvas size is controlled by the embedder.
  44   }
  45   virtual SkCanvas* BeginPaint(const gfx::Rect& damage_rect) override {
  46     if (!surface_->current_sw_canvas_) {
  47       NOTREACHED() << "BeginPaint with no canvas set";
  48       return &null_canvas_;
  49     }
  50     LOG_IF(WARNING, surface_->frame_holder_.get())
  51         << "Mutliple calls to BeginPaint per frame";
  52     return surface_->current_sw_canvas_;
  53   }
  54   virtual void EndPaint(cc::SoftwareFrameData* frame_data) override {
  55   }
  56   virtual void CopyToPixels(const gfx::Rect& rect, void* pixels) override {
  57     NOTIMPLEMENTED();
  58   }
  59
  60  private:
  61   SynchronousCompositorOutputSurface* surface_;
  62   SkCanvas null_canvas_;
  63
  64   DISALLOW_COPY_AND_ASSIGN(SoftwareDevice);
  65 };
  66
  67 SynchronousCompositorOutputSurface::SynchronousCompositorOutputSurface(
  68     int routing_id,
  69     scoped_refptr<FrameSwapMessageQueue> frame_swap_message_queue)
  70     : cc::OutputSurface(
  71           scoped_ptr<cc::SoftwareOutputDevice>(new SoftwareDevice(this))),
  72       routing_id_(routing_id),
  73       registered_(false),
  74       current_sw_canvas_(nullptr),
  75       memory_policy_(0),
  76       output_surface_client_(nullptr),
  77       frame_swap_message_queue_(frame_swap_message_queue),
  78       begin_frame_source_(nullptr) {
  79   capabilities_.deferred_gl_initialization = true;
  80   capabilities_.draw_and_swap_full_viewport_every_frame = true;
  81   capabilities_.adjust_deadline_for_parent = false;
  82   capabilities_.delegated_rendering = true;
  83   capabilities_.max_frames_pending = 1;
  84   memory_policy_.priority_cutoff_when_visible =
  85       gpu::MemoryAllocation::CUTOFF_ALLOW_NICE_TO_HAVE;
  86 }
  87
  88 SynchronousCompositorOutputSurface::~SynchronousCompositorOutputSurface() {
  89   DCHECK(CalledOnValidThread());
  90   if (registered_) {
  91     SynchronousCompositorRegistry::GetInstance()->UnregisterOutputSurface(
  92         routing_id_, this);
  93   }
  94   DCHECK(!begin_frame_source_);
  95 }
  96
  97 bool SynchronousCompositorOutputSurface::BindToClient(
  98     cc::OutputSurfaceClient* surface_client) {
  99   DCHECK(CalledOnValidThread());
 100   if (!cc::OutputSurface::BindToClient(surface_client))
 101     return false;
 102
 103   output_surface_client_ = surface_client;
 104   output_surface_client_->SetMemoryPolicy(memory_policy_);
 105
 106   SynchronousCompositorRegistry::GetInstance()->RegisterOutputSurface(
 107       routing_id_, this);
 108   registered_ = true;
 109
 110   return true;
 111 }
 112
 113 void SynchronousCompositorOutputSurface::Reshape(
 114     const gfx::Size& size, float scale_factor) {
 115   // Intentional no-op: surface size is controlled by the embedder.
 116 }
 117
 118 void SynchronousCompositorOutputSurface::SwapBuffers(
 119     cc::CompositorFrame* frame) {
 120   DCHECK(CalledOnValidThread());
 121
 122   frame_holder_.reset(new cc::CompositorFrame);
 123   frame->AssignTo(frame_holder_.get());
 124
 125   client_->DidSwapBuffers();
 126 }
 127
 128 void SynchronousCompositorOutputSurface::SetBeginFrameSource(
 129     SynchronousCompositorExternalBeginFrameSource* begin_frame_source) {
 130   begin_frame_source_ = begin_frame_source;
 131 }
 132
 133 namespace {
 134 void AdjustTransform(gfx::Transform* transform, gfx::Rect viewport) {
 135   // CC's draw origin starts at the viewport.
 136   transform->matrix().postTranslate(-viewport.x(), -viewport.y(), 0);
 137 }
 138 } // namespace
 139
 140 bool SynchronousCompositorOutputSurface::InitializeHwDraw(
 141     scoped_refptr<cc::ContextProvider> onscreen_context_provider) {
 142   DCHECK(CalledOnValidThread());
 143   DCHECK(HasClient());
 144   DCHECK(!context_provider_.get());
 145
 146   return InitializeAndSetContext3d(onscreen_context_provider);
 147 }
 148
 149 void SynchronousCompositorOutputSurface::ReleaseHwDraw() {
 150   DCHECK(CalledOnValidThread());
 151   cc::OutputSurface::ReleaseGL();
 152 }
 153
 154 scoped_ptr<cc::CompositorFrame>
 155 SynchronousCompositorOutputSurface::DemandDrawHw(
 156     gfx::Size surface_size,
 157     const gfx::Transform& transform,
 158     gfx::Rect viewport,
 159     gfx::Rect clip,
 160     gfx::Rect viewport_rect_for_tile_priority,
 161     const gfx::Transform& transform_for_tile_priority) {
 162   DCHECK(CalledOnValidThread());
 163   DCHECK(HasClient());
 164   DCHECK(context_provider_.get());
 165
 166   surface_size_ = surface_size;
 167   InvokeComposite(transform,
 168                   viewport,
 169                   clip,
 170                   viewport_rect_for_tile_priority,
 171                   transform_for_tile_priority,
 172                   true);
 173
 174   return frame_holder_.Pass();
 175 }
 176
 177 scoped_ptr<cc::CompositorFrame>
 178 SynchronousCompositorOutputSurface::DemandDrawSw(SkCanvas* canvas) {
 179   DCHECK(CalledOnValidThread());
 180   DCHECK(canvas);
 181   DCHECK(!current_sw_canvas_);
 182   base::AutoReset<SkCanvas*> canvas_resetter(&current_sw_canvas_, canvas);
 183
 184   SkIRect canvas_clip;
 185   canvas->getClipDeviceBounds(&canvas_clip);
 186   gfx::Rect clip = gfx::SkIRectToRect(canvas_clip);
 187
 188   gfx::Transform transform(gfx::Transform::kSkipInitialization);
 189   transform.matrix() = canvas->getTotalMatrix();  // Converts 3x3 matrix to 4x4.
 190
 191   surface_size_ = gfx::Size(canvas->getDeviceSize().width(),
 192                             canvas->getDeviceSize().height());
 193
 194   // Pass in the cached hw viewport and transform for tile priority to avoid
 195   // tile thrashing when the WebView is alternating between hardware and
 196   // software draws.
 197   InvokeComposite(transform,
 198                   clip,
 199                   clip,
 200                   cached_hw_viewport_rect_for_tile_priority_,
 201                   cached_hw_transform_for_tile_priority_,
 202                   false);
 203
 204   return frame_holder_.Pass();
 205 }
 206
 207 void SynchronousCompositorOutputSurface::InvokeComposite(
 208     const gfx::Transform& transform,
 209     gfx::Rect viewport,
 210     gfx::Rect clip,
 211     gfx::Rect viewport_rect_for_tile_priority,
 212     gfx::Transform transform_for_tile_priority,
 213     bool hardware_draw) {
 214   DCHECK(!frame_holder_.get());
 215   DCHECK(begin_frame_source_);
 216
 217   gfx::Transform adjusted_transform = transform;
 218   AdjustTransform(&adjusted_transform, viewport);
 219   SetExternalDrawConstraints(adjusted_transform,
 220                              viewport,
 221                              clip,
 222                              viewport_rect_for_tile_priority,
 223                              transform_for_tile_priority,
 224                              !hardware_draw);
 225   SetNeedsRedrawRect(gfx::Rect(viewport.size()));
 226
 227   begin_frame_source_->BeginFrame();
 228
 229   // After software draws (which might move the viewport arbitrarily), restore
 230   // the previous hardware viewport to allow CC's tile manager to prioritize
 231   // properly.
 232   if (hardware_draw) {
 233     cached_hw_transform_ = adjusted_transform;
 234     cached_hw_viewport_ = viewport;
 235     cached_hw_clip_ = clip;
 236     cached_hw_viewport_rect_for_tile_priority_ =
 237         viewport_rect_for_tile_priority;
 238     cached_hw_transform_for_tile_priority_ = transform_for_tile_priority;
 239   } else {
 240     bool resourceless_software_draw = false;
 241     SetExternalDrawConstraints(cached_hw_transform_,
 242                                cached_hw_viewport_,
 243                                cached_hw_clip_,
 244                                cached_hw_viewport_rect_for_tile_priority_,
 245                                cached_hw_transform_for_tile_priority_,
 246                                resourceless_software_draw);
 247   }
 248
 249   if (frame_holder_.get())
 250     client_->DidSwapBuffersComplete();
 251 }
 252
 253 void SynchronousCompositorOutputSurface::ReturnResources(
 254     const cc::CompositorFrameAck& frame_ack) {
 255   ReclaimResources(&frame_ack);
 256 }
 257
 258 void SynchronousCompositorOutputSurface::SetMemoryPolicy(size_t bytes_limit) {
 259   DCHECK(CalledOnValidThread());
 260   memory_policy_.bytes_limit_when_visible = bytes_limit;
 261   memory_policy_.num_resources_limit = kNumResourcesLimit;
 262
 263   if (output_surface_client_)
 264     output_surface_client_->SetMemoryPolicy(memory_policy_);
 265 }
 266
 267 void SynchronousCompositorOutputSurface::SetTreeActivationCallback(
 268     const base::Closure& callback) {
 269   DCHECK(client_);
 270   client_->SetTreeActivationCallback(callback);
 271 }
 272
 273 void SynchronousCompositorOutputSurface::GetMessagesToDeliver(
 274     ScopedVector<IPC::Message>* messages) {
 275   DCHECK(CalledOnValidThread());
 276   scoped_ptr<FrameSwapMessageQueue::SendMessageScope> send_message_scope =
 277       frame_swap_message_queue_->AcquireSendMessageScope();
 278   frame_swap_message_queue_->DrainMessages(messages);
 279 }
 280
 281 // Not using base::NonThreadSafe as we want to enforce a more exacting threading
 282 // requirement: SynchronousCompositorOutputSurface() must only be used on the UI
 283 // thread.
 284 bool SynchronousCompositorOutputSurface::CalledOnValidThread() const {
 285   return BrowserThread::CurrentlyOn(BrowserThread::UI);
 286 }
 287
 288 }  // namespace content