content/browser/android/in_process/synchronous_compositor_impl.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_impl.h"
   6
   7 #include "base/lazy_instance.h"
   8 #include "base/message_loop/message_loop.h"
   9 #include "cc/input/input_handler.h"
  10 #include "cc/input/layer_scroll_offset_delegate.h"
  11 #include "content/browser/android/in_process/synchronous_compositor_factory_impl.h"
  12 #include "content/browser/android/in_process/synchronous_input_event_filter.h"
  13 #include "content/browser/renderer_host/render_widget_host_view_android.h"
  14 #include "content/public/browser/android/synchronous_compositor_client.h"
  15 #include "content/public/browser/browser_thread.h"
  16 #include "content/public/browser/render_process_host.h"
  17 #include "content/public/browser/render_view_host.h"
  18 #include "ui/gl/gl_surface.h"
  19
  20 namespace content {
  21
  22 namespace {
  23
  24 int GetInProcessRendererId() {
  25   content::RenderProcessHost::iterator it =
  26       content::RenderProcessHost::AllHostsIterator();
  27   if (it.IsAtEnd()) {
  28     // There should always be one RPH in single process mode.
  29     NOTREACHED();
  30     return 0;
  31   }
  32
  33   int id = it.GetCurrentValue()->GetID();
  34   it.Advance();
  35   DCHECK(it.IsAtEnd());  // Not multiprocess compatible.
  36   return id;
  37 }
  38
  39 base::LazyInstance<SynchronousCompositorFactoryImpl>::Leaky g_factory =
  40     LAZY_INSTANCE_INITIALIZER;
  41
  42 }  // namespace
  43
  44 DEFINE_WEB_CONTENTS_USER_DATA_KEY(SynchronousCompositorImpl);
  45
  46 // static
  47 SynchronousCompositorImpl* SynchronousCompositorImpl::FromID(int process_id,
  48                                                              int routing_id) {
  49   if (g_factory == NULL)
  50     return NULL;
  51   RenderViewHost* rvh = RenderViewHost::FromID(process_id, routing_id);
  52   if (!rvh)
  53     return NULL;
  54   WebContents* contents = WebContents::FromRenderViewHost(rvh);
  55   if (!contents)
  56     return NULL;
  57   return FromWebContents(contents);
  58 }
  59
  60 SynchronousCompositorImpl* SynchronousCompositorImpl::FromRoutingID(
  61     int routing_id) {
  62   return FromID(GetInProcessRendererId(), routing_id);
  63 }
  64
  65 SynchronousCompositorImpl::SynchronousCompositorImpl(WebContents* contents)
  66     : compositor_client_(NULL),
  67       output_surface_(NULL),
  68       contents_(contents),
  69       input_handler_(NULL) {
  70   DCHECK(contents);
  71 }
  72
  73 SynchronousCompositorImpl::~SynchronousCompositorImpl() {
  74   if (compositor_client_)
  75     compositor_client_->DidDestroyCompositor(this);
  76   SetInputHandler(NULL);
  77 }
  78
  79 void SynchronousCompositorImpl::SetClient(
  80     SynchronousCompositorClient* compositor_client) {
  81   DCHECK(CalledOnValidThread());
  82   compositor_client_ = compositor_client;
  83 }
  84
  85 bool SynchronousCompositorImpl::InitializeHwDraw(
  86     scoped_refptr<gfx::GLSurface> surface) {
  87   DCHECK(CalledOnValidThread());
  88   DCHECK(output_surface_);
  89   bool success = output_surface_->InitializeHwDraw(
  90       surface,
  91       g_factory.Get().GetOffscreenContextProviderForCompositorThread());
  92   if (success)
  93     g_factory.Get().CompositorInitializedHardwareDraw();
  94   return success;
  95 }
  96
  97 void SynchronousCompositorImpl::ReleaseHwDraw() {
  98   DCHECK(CalledOnValidThread());
  99   DCHECK(output_surface_);
 100   output_surface_->ReleaseHwDraw();
 101   g_factory.Get().CompositorReleasedHardwareDraw();
 102 }
 103
 104 bool SynchronousCompositorImpl::DemandDrawHw(
 105       gfx::Size surface_size,
 106       const gfx::Transform& transform,
 107       gfx::Rect viewport,
 108       gfx::Rect clip,
 109       bool stencil_enabled) {
 110   DCHECK(CalledOnValidThread());
 111   DCHECK(output_surface_);
 112
 113   return output_surface_->DemandDrawHw(
 114       surface_size, transform, viewport, clip, stencil_enabled);
 115 }
 116
 117 bool SynchronousCompositorImpl::DemandDrawSw(SkCanvas* canvas) {
 118   DCHECK(CalledOnValidThread());
 119   DCHECK(output_surface_);
 120
 121   return output_surface_->DemandDrawSw(canvas);
 122 }
 123
 124 void SynchronousCompositorImpl::SetMemoryPolicy(
 125     const SynchronousCompositorMemoryPolicy& policy) {
 126   DCHECK(CalledOnValidThread());
 127   DCHECK(output_surface_);
 128
 129   return output_surface_->SetMemoryPolicy(policy);
 130 }
 131
 132 void SynchronousCompositorImpl::DidChangeRootLayerScrollOffset() {
 133   if (input_handler_)
 134     input_handler_->OnRootLayerDelegatedScrollOffsetChanged();
 135 }
 136
 137 void SynchronousCompositorImpl::DidBindOutputSurface(
 138       SynchronousCompositorOutputSurface* output_surface) {
 139   DCHECK(CalledOnValidThread());
 140   output_surface_ = output_surface;
 141   if (compositor_client_)
 142     compositor_client_->DidInitializeCompositor(this);
 143 }
 144
 145 void SynchronousCompositorImpl::DidDestroySynchronousOutputSurface(
 146        SynchronousCompositorOutputSurface* output_surface) {
 147   DCHECK(CalledOnValidThread());
 148
 149   // Allow for transient hand-over when two output surfaces may refer to
 150   // a single delegate.
 151   if (output_surface_ == output_surface) {
 152     output_surface_ = NULL;
 153     if (compositor_client_)
 154       compositor_client_->DidDestroyCompositor(this);
 155     compositor_client_ = NULL;
 156   }
 157 }
 158
 159 void SynchronousCompositorImpl::SetInputHandler(
 160     cc::InputHandler* input_handler) {
 161   DCHECK(CalledOnValidThread());
 162
 163   if (input_handler_)
 164     input_handler_->SetRootLayerScrollOffsetDelegate(NULL);
 165
 166   input_handler_ = input_handler;
 167
 168   if (input_handler_)
 169     input_handler_->SetRootLayerScrollOffsetDelegate(this);
 170 }
 171
 172 void SynchronousCompositorImpl::DidOverscroll(
 173     const cc::DidOverscrollParams& params) {
 174   if (compositor_client_) {
 175     compositor_client_->DidOverscroll(params.accumulated_overscroll,
 176                                       params.latest_overscroll_delta,
 177                                       params.current_fling_velocity);
 178   }
 179 }
 180
 181 void SynchronousCompositorImpl::SetContinuousInvalidate(bool enable) {
 182   DCHECK(CalledOnValidThread());
 183   if (compositor_client_)
 184     compositor_client_->SetContinuousInvalidate(enable);
 185 }
 186
 187 InputEventAckState SynchronousCompositorImpl::HandleInputEvent(
 188     const blink::WebInputEvent& input_event) {
 189   DCHECK(CalledOnValidThread());
 190   return g_factory.Get().synchronous_input_event_filter()->HandleInputEvent(
 191       contents_->GetRoutingID(), input_event);
 192 }
 193
 194 void SynchronousCompositorImpl::UpdateFrameMetaData(
 195     const cc::CompositorFrameMetadata& frame_metadata) {
 196   RenderWidgetHostViewAndroid* rwhv = static_cast<RenderWidgetHostViewAndroid*>(
 197       contents_->GetRenderWidgetHostView());
 198   if (rwhv)
 199     rwhv->SynchronousFrameMetadata(frame_metadata);
 200 }
 201
 202 void SynchronousCompositorImpl::DidActivatePendingTree() {
 203   if (compositor_client_)
 204     compositor_client_->DidUpdateContent();
 205 }
 206
 207 void SynchronousCompositorImpl::SetMaxScrollOffset(
 208     gfx::Vector2dF max_scroll_offset) {
 209   DCHECK(CalledOnValidThread());
 210   if (compositor_client_)
 211     compositor_client_->SetMaxRootLayerScrollOffset(max_scroll_offset);
 212 }
 213
 214 void SynchronousCompositorImpl::SetTotalScrollOffset(gfx::Vector2dF new_value) {
 215   DCHECK(CalledOnValidThread());
 216   if (compositor_client_)
 217     compositor_client_->SetTotalRootLayerScrollOffset(new_value);
 218 }
 219
 220 gfx::Vector2dF SynchronousCompositorImpl::GetTotalScrollOffset() {
 221   DCHECK(CalledOnValidThread());
 222   if (compositor_client_)
 223     return compositor_client_->GetTotalRootLayerScrollOffset();
 224   return gfx::Vector2dF();
 225 }
 226
 227 bool SynchronousCompositorImpl::IsExternalFlingActive() const {
 228   DCHECK(CalledOnValidThread());
 229   if (compositor_client_)
 230     return compositor_client_->IsExternalFlingActive();
 231   return false;
 232 }
 233
 234 void SynchronousCompositorImpl::SetTotalPageScaleFactor(
 235     float page_scale_factor) {
 236   DCHECK(CalledOnValidThread());
 237   if (compositor_client_)
 238     compositor_client_->SetRootLayerPageScaleFactor(page_scale_factor);
 239 }
 240
 241 void SynchronousCompositorImpl::SetScrollableSize(gfx::SizeF scrollable_size) {
 242   DCHECK(CalledOnValidThread());
 243   if (compositor_client_)
 244     compositor_client_->SetRootLayerScrollableSize(scrollable_size);
 245 }
 246
 247 // Not using base::NonThreadSafe as we want to enforce a more exacting threading
 248 // requirement: SynchronousCompositorImpl() must only be used on the UI thread.
 249 bool SynchronousCompositorImpl::CalledOnValidThread() const {
 250   return BrowserThread::CurrentlyOn(BrowserThread::UI);
 251 }
 252
 253 // static
 254 void SynchronousCompositor::SetClientForWebContents(
 255     WebContents* contents,
 256     SynchronousCompositorClient* client) {
 257   DCHECK(contents);
 258   if (client) {
 259     g_factory.Get();  // Ensure it's initialized.
 260     SynchronousCompositorImpl::CreateForWebContents(contents);
 261   }
 262   if (SynchronousCompositorImpl* instance =
 263       SynchronousCompositorImpl::FromWebContents(contents)) {
 264     instance->SetClient(client);
 265   }
 266 }
 267
 268 }  // namespace content