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   void Resize(const gfx::Size& pixel_size, float scale_factor) override {
  42     // Intentional no-op: canvas size is controlled by the embedder.
  43   }
  44   SkCanvas* BeginPaint(const gfx::Rect& damage_rect) override {
  45     if (!surface_->current_sw_canvas_) {
  46       NOTREACHED() << "BeginPaint with no canvas set";
  47       return &null_canvas_;
  48     }
  49     LOG_IF(WARNING, surface_->frame_holder_.get())
  50         << "Mutliple calls to BeginPaint per frame";
  51     return surface_->current_sw_canvas_;
  52   }
  53   void EndPaint(cc::SoftwareFrameData* frame_data) override {}
  54   void CopyToPixels(const gfx::Rect& rect, void* pixels) override {
  55     NOTIMPLEMENTED();
  56   }
  57
  58  private:
  59   SynchronousCompositorOutputSurface* surface_;
  60   SkCanvas null_canvas_;
  61
  62   DISALLOW_COPY_AND_ASSIGN(SoftwareDevice);
  63 };
  64
  65 SynchronousCompositorOutputSurface::SynchronousCompositorOutputSurface(
  66     int routing_id,
  67     scoped_refptr<FrameSwapMessageQueue> frame_swap_message_queue)
  68     : cc::OutputSurface(
  69           scoped_ptr<cc::SoftwareOutputDevice>(new SoftwareDevice(this))),
  70       routing_id_(routing_id),
  71       registered_(false),
  72       current_sw_canvas_(nullptr),
  73       memory_policy_(0),
  74       frame_swap_message_queue_(frame_swap_message_queue) {
  75   capabilities_.deferred_gl_initialization = true;
  76   capabilities_.draw_and_swap_full_viewport_every_frame = true;
  77   capabilities_.adjust_deadline_for_parent = false;
  78   capabilities_.delegated_rendering = true;
  79   capabilities_.max_frames_pending = 1;
  80   memory_policy_.priority_cutoff_when_visible =
  81       gpu::MemoryAllocation::CUTOFF_ALLOW_NICE_TO_HAVE;
  82 }
  83
  84 SynchronousCompositorOutputSurface::~SynchronousCompositorOutputSurface() {
  85   DCHECK(CalledOnValidThread());
  86   if (registered_) {
  87     SynchronousCompositorRegistry::GetInstance()->UnregisterOutputSurface(
  88         routing_id_, this);
  89   }
  90 }
  91
  92 bool SynchronousCompositorOutputSurface::BindToClient(
  93     cc::OutputSurfaceClient* surface_client) {
  94   DCHECK(CalledOnValidThread());
  95   if (!cc::OutputSurface::BindToClient(surface_client))
  96     return false;
  97
  98   client_->SetMemoryPolicy(memory_policy_);
  99
 100   SynchronousCompositorRegistry::GetInstance()->RegisterOutputSurface(
 101       routing_id_, this);
 102   registered_ = true;
 103
 104   return true;
 105 }
 106
 107 void SynchronousCompositorOutputSurface::SetCompositor(
 108     SynchronousCompositorImpl* compositor) {
 109   DCHECK(CalledOnValidThread());
 110   compositor_ = compositor;
 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::Invalidate() {
 129   DCHECK(CalledOnValidThread());
 130   compositor_->PostInvalidate();
 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     scoped_refptr<cc::ContextProvider> worker_context_provider) {
 143   DCHECK(CalledOnValidThread());
 144   DCHECK(HasClient());
 145   DCHECK(!context_provider_.get());
 146
 147   return InitializeAndSetContext3d(onscreen_context_provider,
 148                                    worker_context_provider);
 149 }
 150
 151 void SynchronousCompositorOutputSurface::ReleaseHwDraw() {
 152   DCHECK(CalledOnValidThread());
 153   cc::OutputSurface::ReleaseGL();
 154 }
 155
 156 scoped_ptr<cc::CompositorFrame>
 157 SynchronousCompositorOutputSurface::DemandDrawHw(
 158     gfx::Size surface_size,
 159     const gfx::Transform& transform,
 160     gfx::Rect viewport,
 161     gfx::Rect clip,
 162     gfx::Rect viewport_rect_for_tile_priority,
 163     const gfx::Transform& transform_for_tile_priority) {
 164   DCHECK(CalledOnValidThread());
 165   DCHECK(HasClient());
 166   DCHECK(context_provider_.get());
 167
 168   surface_size_ = surface_size;
 169   InvokeComposite(transform,
 170                   viewport,
 171                   clip,
 172                   viewport_rect_for_tile_priority,
 173                   transform_for_tile_priority,
 174                   true);
 175
 176   return frame_holder_.Pass();
 177 }
 178
 179 scoped_ptr<cc::CompositorFrame>
 180 SynchronousCompositorOutputSurface::DemandDrawSw(SkCanvas* canvas) {
 181   DCHECK(CalledOnValidThread());
 182   DCHECK(canvas);
 183   DCHECK(!current_sw_canvas_);
 184
 185   base::AutoReset<SkCanvas*> canvas_resetter(&current_sw_canvas_, canvas);
 186
 187   SkIRect canvas_clip;
 188   canvas->getClipDeviceBounds(&canvas_clip);
 189   gfx::Rect clip = gfx::SkIRectToRect(canvas_clip);
 190
 191   gfx::Transform transform(gfx::Transform::kSkipInitialization);
 192   transform.matrix() = canvas->getTotalMatrix();  // Converts 3x3 matrix to 4x4.
 193
 194   surface_size_ = gfx::Size(canvas->getDeviceSize().width(),
 195                             canvas->getDeviceSize().height());
 196
 197   // Pass in the cached hw viewport and transform for tile priority to avoid
 198   // tile thrashing when the WebView is alternating between hardware and
 199   // software draws.
 200   InvokeComposite(transform,
 201                   clip,
 202                   clip,
 203                   cached_hw_viewport_rect_for_tile_priority_,
 204                   cached_hw_transform_for_tile_priority_,
 205                   false);
 206
 207   return frame_holder_.Pass();
 208 }
 209
 210 void SynchronousCompositorOutputSurface::InvokeComposite(
 211     const gfx::Transform& transform,
 212     gfx::Rect viewport,
 213     gfx::Rect clip,
 214     gfx::Rect viewport_rect_for_tile_priority,
 215     gfx::Transform transform_for_tile_priority,
 216     bool hardware_draw) {
 217   DCHECK(!frame_holder_.get());
 218
 219   gfx::Transform adjusted_transform = transform;
 220   AdjustTransform(&adjusted_transform, viewport);
 221   SetExternalDrawConstraints(adjusted_transform,
 222                              viewport,
 223                              clip,
 224                              viewport_rect_for_tile_priority,
 225                              transform_for_tile_priority,
 226                              !hardware_draw);
 227   SetNeedsRedrawRect(gfx::Rect(viewport.size()));
 228
 229   client_->OnDraw();
 230
 231   // After software draws (which might move the viewport arbitrarily), restore
 232   // the previous hardware viewport to allow CC's tile manager to prioritize
 233   // properly.
 234   if (hardware_draw) {
 235     cached_hw_transform_ = adjusted_transform;
 236     cached_hw_viewport_ = viewport;
 237     cached_hw_clip_ = clip;
 238     cached_hw_viewport_rect_for_tile_priority_ =
 239         viewport_rect_for_tile_priority;
 240     cached_hw_transform_for_tile_priority_ = transform_for_tile_priority;
 241   } else {
 242     bool resourceless_software_draw = false;
 243     SetExternalDrawConstraints(cached_hw_transform_,
 244                                cached_hw_viewport_,
 245                                cached_hw_clip_,
 246                                cached_hw_viewport_rect_for_tile_priority_,
 247                                cached_hw_transform_for_tile_priority_,
 248                                resourceless_software_draw);
 249   }
 250
 251   if (frame_holder_.get())
 252     client_->DidSwapBuffersComplete();
 253 }
 254
 255 void SynchronousCompositorOutputSurface::ReturnResources(
 256     const cc::CompositorFrameAck& frame_ack) {
 257   ReclaimResources(&frame_ack);
 258 }
 259
 260 void SynchronousCompositorOutputSurface::SetMemoryPolicy(size_t bytes_limit) {
 261   DCHECK(CalledOnValidThread());
 262   memory_policy_.bytes_limit_when_visible = bytes_limit;
 263   memory_policy_.num_resources_limit = kNumResourcesLimit;
 264
 265   if (client_)
 266     client_->SetMemoryPolicy(memory_policy_);
 267 }
 268
 269 void SynchronousCompositorOutputSurface::SetTreeActivationCallback(
 270     const base::Closure& callback) {
 271   DCHECK(client_);
 272   client_->SetTreeActivationCallback(callback);
 273 }
 274
 275 void SynchronousCompositorOutputSurface::GetMessagesToDeliver(
 276     ScopedVector<IPC::Message>* messages) {
 277   DCHECK(CalledOnValidThread());
 278   scoped_ptr<FrameSwapMessageQueue::SendMessageScope> send_message_scope =
 279       frame_swap_message_queue_->AcquireSendMessageScope();
 280   frame_swap_message_queue_->DrainMessages(messages);
 281 }
 282
 283 // Not using base::NonThreadSafe as we want to enforce a more exacting threading
 284 // requirement: SynchronousCompositorOutputSurface() must only be used on the UI
 285 // thread.
 286 bool SynchronousCompositorOutputSurface::CalledOnValidThread() const {
 287   return BrowserThread::CurrentlyOn(BrowserThread::UI);
 288 }
 289
 290 }  // namespace content