cc/surfaces/display.cc

   1 // Copyright 2014 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 "cc/surfaces/display.h"
   6
   7 #include "base/debug/trace_event.h"
   8 #include "base/message_loop/message_loop.h"
   9 #include "cc/output/compositor_frame.h"
  10 #include "cc/output/compositor_frame_ack.h"
  11 #include "cc/output/direct_renderer.h"
  12 #include "cc/output/gl_renderer.h"
  13 #include "cc/output/software_renderer.h"
  14 #include "cc/surfaces/display_client.h"
  15 #include "cc/surfaces/surface.h"
  16 #include "cc/surfaces/surface_aggregator.h"
  17 #include "cc/surfaces/surface_manager.h"
  18
  19 namespace cc {
  20
  21 Display::Display(DisplayClient* client,
  22                  SurfaceManager* manager,
  23                  SharedBitmapManager* bitmap_manager)
  24     : client_(client), manager_(manager), bitmap_manager_(bitmap_manager) {
  25   manager_->AddObserver(this);
  26 }
  27
  28 Display::~Display() {
  29   manager_->RemoveObserver(this);
  30 }
  31
  32 void Display::Resize(SurfaceId id, const gfx::Size& size) {
  33   current_surface_id_ = id;
  34   current_surface_size_ = size;
  35   client_->DisplayDamaged();
  36 }
  37
  38 void Display::InitializeOutputSurface() {
  39   if (output_surface_)
  40     return;
  41   scoped_ptr<OutputSurface> output_surface = client_->CreateOutputSurface();
  42   if (!output_surface->BindToClient(this))
  43     return;
  44
  45   int highp_threshold_min = 0;
  46   bool use_rgba_4444_texture_format = false;
  47   size_t id_allocation_chunk_size = 1;
  48   bool use_distance_field_text = false;
  49   scoped_ptr<ResourceProvider> resource_provider =
  50       ResourceProvider::Create(output_surface.get(),
  51                                bitmap_manager_,
  52                                highp_threshold_min,
  53                                use_rgba_4444_texture_format,
  54                                id_allocation_chunk_size,
  55                                use_distance_field_text);
  56   if (!resource_provider)
  57     return;
  58
  59   if (output_surface->context_provider()) {
  60     TextureMailboxDeleter* texture_mailbox_deleter = NULL;
  61     scoped_ptr<GLRenderer> renderer =
  62         GLRenderer::Create(this,
  63                            &settings_,
  64                            output_surface.get(),
  65                            resource_provider.get(),
  66                            texture_mailbox_deleter,
  67                            highp_threshold_min);
  68     if (!renderer)
  69       return;
  70     renderer_ = renderer.Pass();
  71   } else {
  72     scoped_ptr<SoftwareRenderer> renderer = SoftwareRenderer::Create(
  73         this, &settings_, output_surface.get(), resource_provider.get());
  74     if (!renderer)
  75       return;
  76     renderer_ = renderer.Pass();
  77   }
  78
  79   output_surface_ = output_surface.Pass();
  80   resource_provider_ = resource_provider.Pass();
  81   aggregator_.reset(new SurfaceAggregator(manager_, resource_provider_.get()));
  82 }
  83
  84 bool Display::Draw() {
  85   if (current_surface_id_.is_null())
  86     return false;
  87
  88   InitializeOutputSurface();
  89   if (!output_surface_)
  90     return false;
  91
  92   contained_surfaces_.clear();
  93
  94   scoped_ptr<CompositorFrame> frame =
  95       aggregator_->Aggregate(current_surface_id_, &contained_surfaces_);
  96   if (!frame)
  97     return false;
  98
  99   TRACE_EVENT0("cc", "Display::Draw");
 100   DelegatedFrameData* frame_data = frame->delegated_frame_data.get();
 101
 102   // Only reshape when we know we are going to draw. Otherwise, the reshape
 103   // can leave the window at the wrong size if we never draw and the proper
 104   // viewport size is never set.
 105   output_surface_->Reshape(current_surface_size_, 1.f);
 106   float device_scale_factor = 1.0f;
 107   gfx::Rect device_viewport_rect = gfx::Rect(current_surface_size_);
 108   gfx::Rect device_clip_rect = device_viewport_rect;
 109   bool disable_picture_quad_image_filtering = false;
 110
 111   renderer_->DecideRenderPassAllocationsForFrame(frame_data->render_pass_list);
 112   renderer_->DrawFrame(&frame_data->render_pass_list,
 113                        device_scale_factor,
 114                        device_viewport_rect,
 115                        device_clip_rect,
 116                        disable_picture_quad_image_filtering);
 117   CompositorFrameMetadata metadata;
 118   renderer_->SwapBuffers(metadata);
 119   return true;
 120 }
 121
 122 void Display::OnSurfaceDamaged(SurfaceId surface) {
 123   if (contained_surfaces_.find(surface) != contained_surfaces_.end())
 124     client_->DisplayDamaged();
 125 }
 126
 127 SurfaceId Display::CurrentSurfaceId() {
 128   return current_surface_id_;
 129 }
 130
 131 }  // namespace cc