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/context_support.h"
  20 #include "gpu/command_buffer/client/gles2_interface.h"
  21 #include "gpu/command_buffer/common/gpu_memory_allocation.h"
  22 #include "third_party/skia/include/core/SkCanvas.h"
  23 #include "ui/gfx/geometry/rect_conversions.h"
  24 #include "ui/gfx/skia_util.h"
  25 #include "ui/gfx/transform.h"
  26
  27 namespace content {
  28
  29 namespace {
  30
  31 // Do not limit number of resources, so use an unrealistically high value.
  32 const size_t kNumResourcesLimit = 10 * 1000 * 1000;
  33
  34 } // namespace
  35
  36 class SynchronousCompositorOutputSurface::SoftwareDevice
  37   : public cc::SoftwareOutputDevice {
  38  public:
  39   SoftwareDevice(SynchronousCompositorOutputSurface* surface)
  40     : surface_(surface) {
  41   }
  42   void Resize(const gfx::Size& pixel_size, float scale_factor) override {
  43     // Intentional no-op: canvas size is controlled by the embedder.
  44   }
  45   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   void EndPaint() override {}
  55
  56  private:
  57   SynchronousCompositorOutputSurface* surface_;
  58   SkCanvas null_canvas_;
  59
  60   DISALLOW_COPY_AND_ASSIGN(SoftwareDevice);
  61 };
  62
  63 SynchronousCompositorOutputSurface::SynchronousCompositorOutputSurface(
  64     const scoped_refptr<cc::ContextProvider>& context_provider,
  65     const scoped_refptr<cc::ContextProvider>& worker_context_provider,
  66     int routing_id,
  67     scoped_refptr<FrameSwapMessageQueue> frame_swap_message_queue)
  68     : cc::OutputSurface(
  69           context_provider,
  70           worker_context_provider,
  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       frame_swap_message_queue_(frame_swap_message_queue) {
  77   capabilities_.draw_and_swap_full_viewport_every_frame = true;
  78   capabilities_.adjust_deadline_for_parent = false;
  79   capabilities_.delegated_rendering = true;
  80   capabilities_.max_frames_pending = 1;
  81   memory_policy_.priority_cutoff_when_visible =
  82       gpu::MemoryAllocation::CUTOFF_ALLOW_NICE_TO_HAVE;
  83 }
  84
  85 SynchronousCompositorOutputSurface::~SynchronousCompositorOutputSurface() {
  86   DCHECK(CalledOnValidThread());
  87   if (registered_) {
  88     SynchronousCompositorRegistry::GetInstance()->UnregisterOutputSurface(
  89         routing_id_, this);
  90   }
  91 }
  92
  93 bool SynchronousCompositorOutputSurface::BindToClient(
  94     cc::OutputSurfaceClient* surface_client) {
  95   DCHECK(CalledOnValidThread());
  96   if (!cc::OutputSurface::BindToClient(surface_client))
  97     return false;
  98
  99   client_->SetMemoryPolicy(memory_policy_);
 100
 101   SynchronousCompositorRegistry::GetInstance()->RegisterOutputSurface(
 102       routing_id_, this);
 103   registered_ = true;
 104
 105   return true;
 106 }
 107
 108 void SynchronousCompositorOutputSurface::SetCompositor(
 109     SynchronousCompositorImpl* compositor) {
 110   DCHECK(CalledOnValidThread());
 111   compositor_ = compositor;
 112 }
 113
 114 void SynchronousCompositorOutputSurface::Reshape(
 115     const gfx::Size& size, float scale_factor) {
 116   // Intentional no-op: surface size is controlled by the embedder.
 117 }
 118
 119 void SynchronousCompositorOutputSurface::SwapBuffers(
 120     cc::CompositorFrame* frame) {
 121   DCHECK(CalledOnValidThread());
 122
 123   frame_holder_.reset(new cc::CompositorFrame);
 124   frame->AssignTo(frame_holder_.get());
 125
 126   client_->DidSwapBuffers();
 127 }
 128
 129 void SynchronousCompositorOutputSurface::Invalidate() {
 130   DCHECK(CalledOnValidThread());
 131   compositor_->PostInvalidate();
 132 }
 133
 134 namespace {
 135 void AdjustTransform(gfx::Transform* transform, gfx::Rect viewport) {
 136   // CC's draw origin starts at the viewport.
 137   transform->matrix().postTranslate(-viewport.x(), -viewport.y(), 0);
 138 }
 139 } // namespace
 140
 141 scoped_ptr<cc::CompositorFrame>
 142 SynchronousCompositorOutputSurface::DemandDrawHw(
 143     gfx::Size surface_size,
 144     const gfx::Transform& transform,
 145     gfx::Rect viewport,
 146     gfx::Rect clip,
 147     gfx::Rect viewport_rect_for_tile_priority,
 148     const gfx::Transform& transform_for_tile_priority) {
 149   DCHECK(CalledOnValidThread());
 150   DCHECK(HasClient());
 151   DCHECK(context_provider_.get());
 152
 153   surface_size_ = surface_size;
 154   InvokeComposite(transform,
 155                   viewport,
 156                   clip,
 157                   viewport_rect_for_tile_priority,
 158                   transform_for_tile_priority,
 159                   true);
 160
 161   return frame_holder_.Pass();
 162 }
 163
 164 scoped_ptr<cc::CompositorFrame>
 165 SynchronousCompositorOutputSurface::DemandDrawSw(SkCanvas* canvas) {
 166   DCHECK(CalledOnValidThread());
 167   DCHECK(canvas);
 168   DCHECK(!current_sw_canvas_);
 169
 170   base::AutoReset<SkCanvas*> canvas_resetter(&current_sw_canvas_, canvas);
 171
 172   SkIRect canvas_clip;
 173   canvas->getClipDeviceBounds(&canvas_clip);
 174   gfx::Rect clip = gfx::SkIRectToRect(canvas_clip);
 175
 176   gfx::Transform transform(gfx::Transform::kSkipInitialization);
 177   transform.matrix() = canvas->getTotalMatrix();  // Converts 3x3 matrix to 4x4.
 178
 179   surface_size_ = gfx::Size(canvas->getDeviceSize().width(),
 180                             canvas->getDeviceSize().height());
 181
 182   // Pass in the cached hw viewport and transform for tile priority to avoid
 183   // tile thrashing when the WebView is alternating between hardware and
 184   // software draws.
 185   InvokeComposite(transform,
 186                   clip,
 187                   clip,
 188                   cached_hw_viewport_rect_for_tile_priority_,
 189                   cached_hw_transform_for_tile_priority_,
 190                   false);
 191
 192   return frame_holder_.Pass();
 193 }
 194
 195 void SynchronousCompositorOutputSurface::InvokeComposite(
 196     const gfx::Transform& transform,
 197     gfx::Rect viewport,
 198     gfx::Rect clip,
 199     gfx::Rect viewport_rect_for_tile_priority,
 200     gfx::Transform transform_for_tile_priority,
 201     bool hardware_draw) {
 202   DCHECK(!frame_holder_.get());
 203
 204   gfx::Transform adjusted_transform = transform;
 205   AdjustTransform(&adjusted_transform, viewport);
 206   SetExternalDrawConstraints(adjusted_transform,
 207                              viewport,
 208                              clip,
 209                              viewport_rect_for_tile_priority,
 210                              transform_for_tile_priority,
 211                              !hardware_draw);
 212   SetNeedsRedrawRect(gfx::Rect(viewport.size()));
 213
 214   client_->OnDraw();
 215
 216   // After software draws (which might move the viewport arbitrarily), restore
 217   // the previous hardware viewport to allow CC's tile manager to prioritize
 218   // properly.
 219   if (hardware_draw) {
 220     cached_hw_transform_ = adjusted_transform;
 221     cached_hw_viewport_ = viewport;
 222     cached_hw_clip_ = clip;
 223     cached_hw_viewport_rect_for_tile_priority_ =
 224         viewport_rect_for_tile_priority;
 225     cached_hw_transform_for_tile_priority_ = transform_for_tile_priority;
 226   } else {
 227     bool resourceless_software_draw = false;
 228     SetExternalDrawConstraints(cached_hw_transform_,
 229                                cached_hw_viewport_,
 230                                cached_hw_clip_,
 231                                cached_hw_viewport_rect_for_tile_priority_,
 232                                cached_hw_transform_for_tile_priority_,
 233                                resourceless_software_draw);
 234   }
 235
 236   if (frame_holder_.get())
 237     client_->DidSwapBuffersComplete();
 238 }
 239
 240 void SynchronousCompositorOutputSurface::ReturnResources(
 241     const cc::CompositorFrameAck& frame_ack) {
 242   ReclaimResources(&frame_ack);
 243 }
 244
 245 void SynchronousCompositorOutputSurface::SetMemoryPolicy(size_t bytes_limit) {
 246   DCHECK(CalledOnValidThread());
 247   bool became_zero = memory_policy_.bytes_limit_when_visible && !bytes_limit;
 248   bool became_non_zero =
 249       !memory_policy_.bytes_limit_when_visible && bytes_limit;
 250   memory_policy_.bytes_limit_when_visible = bytes_limit;
 251   memory_policy_.num_resources_limit = kNumResourcesLimit;
 252
 253   if (client_)
 254     client_->SetMemoryPolicy(memory_policy_);
 255
 256   if (became_zero) {
 257     // This is small hack to drop context resources without destroying it
 258     // when this compositor is put into the background.
 259     context_provider()->ContextSupport()->SetAggressivelyFreeResources(
 260         true /* aggressively_free_resources */);
 261   } else if (became_non_zero) {
 262     context_provider()->ContextSupport()->SetAggressivelyFreeResources(
 263         false /* aggressively_free_resources */);
 264   }
 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