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