cc/output/delegating_renderer.cc

   1 // Copyright 2012 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/output/delegating_renderer.h"
   6
   7 #include <set>
   8 #include <string>
   9 #include <vector>
  10
  11 #include "base/debug/trace_event.h"
  12 #include "base/strings/string_split.h"
  13 #include "base/strings/string_util.h"
  14 #include "base/strings/stringprintf.h"
  15 #include "cc/output/compositor_frame_ack.h"
  16 #include "cc/quads/checkerboard_draw_quad.h"
  17 #include "cc/quads/debug_border_draw_quad.h"
  18 #include "cc/quads/render_pass.h"
  19 #include "cc/quads/render_pass_draw_quad.h"
  20 #include "cc/quads/solid_color_draw_quad.h"
  21 #include "cc/quads/texture_draw_quad.h"
  22 #include "cc/quads/tile_draw_quad.h"
  23 #include "cc/quads/yuv_video_draw_quad.h"
  24 #include "cc/resources/resource_provider.h"
  25 #include "gpu/command_buffer/client/context_support.h"
  26 #include "gpu/command_buffer/client/gles2_interface.h"
  27 #include "gpu/command_buffer/common/gpu_memory_allocation.h"
  28 #include "third_party/khronos/GLES2/gl2ext.h"
  29
  30
  31 namespace cc {
  32
  33 scoped_ptr<DelegatingRenderer> DelegatingRenderer::Create(
  34     RendererClient* client,
  35     const LayerTreeSettings* settings,
  36     OutputSurface* output_surface,
  37     ResourceProvider* resource_provider) {
  38   scoped_ptr<DelegatingRenderer> renderer(new DelegatingRenderer(
  39       client, settings, output_surface, resource_provider));
  40   if (!renderer->Initialize())
  41     return scoped_ptr<DelegatingRenderer>();
  42   return renderer.Pass();
  43 }
  44
  45 DelegatingRenderer::DelegatingRenderer(RendererClient* client,
  46                                        const LayerTreeSettings* settings,
  47                                        OutputSurface* output_surface,
  48                                        ResourceProvider* resource_provider)
  49     : Renderer(client, settings),
  50       output_surface_(output_surface),
  51       resource_provider_(resource_provider),
  52       visible_(true) {
  53   DCHECK(resource_provider_);
  54 }
  55
  56 bool DelegatingRenderer::Initialize() {
  57   capabilities_.using_partial_swap = false;
  58   capabilities_.max_texture_size = resource_provider_->max_texture_size();
  59   capabilities_.best_texture_format = resource_provider_->best_texture_format();
  60   capabilities_.allow_partial_texture_updates = false;
  61   capabilities_.using_offscreen_context3d = false;
  62
  63   if (!output_surface_->context_provider()) {
  64     capabilities_.using_shared_memory_resources = true;
  65     capabilities_.using_map_image = settings_->use_map_image;
  66     return true;
  67   }
  68
  69   const ContextProvider::Capabilities& caps =
  70       output_surface_->context_provider()->ContextCapabilities();
  71
  72   DCHECK(!caps.gpu.iosurface || caps.gpu.texture_rectangle);
  73
  74   capabilities_.using_egl_image = caps.gpu.egl_image_external;
  75   capabilities_.using_map_image =
  76       settings_->use_map_image && caps.gpu.map_image;
  77
  78   capabilities_.allow_rasterize_on_demand = false;
  79
  80   return true;
  81 }
  82
  83 DelegatingRenderer::~DelegatingRenderer() {}
  84
  85 const RendererCapabilitiesImpl& DelegatingRenderer::Capabilities() const {
  86   return capabilities_;
  87 }
  88
  89 bool DelegatingRenderer::CanReadPixels() const { return false; }
  90
  91 static ResourceProvider::ResourceId AppendToArray(
  92     ResourceProvider::ResourceIdArray* array,
  93     ResourceProvider::ResourceId id) {
  94   array->push_back(id);
  95   return id;
  96 }
  97
  98 void DelegatingRenderer::DrawFrame(RenderPassList* render_passes_in_draw_order,
  99                                    ContextProvider* offscreen_context_provider,
 100                                    float device_scale_factor,
 101                                    const gfx::Rect& device_viewport_rect,
 102                                    const gfx::Rect& device_clip_rect,
 103                                    bool disable_picture_quad_image_filtering) {
 104   TRACE_EVENT0("cc", "DelegatingRenderer::DrawFrame");
 105
 106   DCHECK(!delegated_frame_data_);
 107
 108   delegated_frame_data_ = make_scoped_ptr(new DelegatedFrameData);
 109   DelegatedFrameData& out_data = *delegated_frame_data_;
 110   // Move the render passes and resources into the |out_frame|.
 111   out_data.render_pass_list.swap(*render_passes_in_draw_order);
 112
 113   // Collect all resource ids in the render passes into a ResourceIdArray.
 114   ResourceProvider::ResourceIdArray resources;
 115   DrawQuad::ResourceIteratorCallback append_to_array =
 116       base::Bind(&AppendToArray, &resources);
 117   for (size_t i = 0; i < out_data.render_pass_list.size(); ++i) {
 118     RenderPass* render_pass = out_data.render_pass_list.at(i);
 119     for (size_t j = 0; j < render_pass->quad_list.size(); ++j)
 120       render_pass->quad_list[j]->IterateResources(append_to_array);
 121   }
 122   resource_provider_->PrepareSendToParent(resources, &out_data.resource_list);
 123 }
 124
 125 void DelegatingRenderer::SwapBuffers(const CompositorFrameMetadata& metadata) {
 126   TRACE_EVENT0("cc,benchmark", "DelegatingRenderer::SwapBuffers");
 127   CompositorFrame compositor_frame;
 128   compositor_frame.metadata = metadata;
 129   compositor_frame.delegated_frame_data = delegated_frame_data_.Pass();
 130   output_surface_->SwapBuffers(&compositor_frame);
 131 }
 132
 133 void DelegatingRenderer::GetFramebufferPixels(void* pixels,
 134                                               const gfx::Rect& rect) {
 135   NOTREACHED();
 136 }
 137
 138 void DelegatingRenderer::ReceiveSwapBuffersAck(
 139     const CompositorFrameAck& ack) {
 140   resource_provider_->ReceiveReturnsFromParent(ack.resources);
 141 }
 142
 143 bool DelegatingRenderer::IsContextLost() {
 144   ContextProvider* context_provider = output_surface_->context_provider();
 145   if (!context_provider)
 146     return false;
 147   return context_provider->IsContextLost();
 148 }
 149
 150 void DelegatingRenderer::SetVisible(bool visible) {
 151   if (visible == visible_)
 152     return;
 153
 154   visible_ = visible;
 155   ContextProvider* context_provider = output_surface_->context_provider();
 156   if (!visible_) {
 157     TRACE_EVENT0("cc", "DelegatingRenderer::SetVisible dropping resources");
 158     resource_provider_->ReleaseCachedData();
 159     if (context_provider)
 160       context_provider->ContextGL()->Flush();
 161   }
 162   // We loop visibility to the GPU process, since that's what manages memory.
 163   // That will allow it to feed us with memory allocations that we can act
 164   // upon.
 165   if (context_provider)
 166     context_provider->ContextSupport()->SetSurfaceVisible(visible);
 167 }
 168
 169 void DelegatingRenderer::SendManagedMemoryStats(size_t bytes_visible,
 170                                                 size_t bytes_visible_and_nearby,
 171                                                 size_t bytes_allocated) {
 172   ContextProvider* context_provider = output_surface_->context_provider();
 173   if (!context_provider) {
 174     // In the software path each child process manages its memory separately,
 175     // so memory stats don't have to be sent anywhere.
 176     return;
 177   }
 178   gpu::ManagedMemoryStats stats;
 179   stats.bytes_required = bytes_visible;
 180   stats.bytes_nice_to_have = bytes_visible_and_nearby;
 181   stats.bytes_allocated = bytes_allocated;
 182   stats.backbuffer_requested = false;
 183
 184   context_provider->ContextSupport()->SendManagedMemoryStats(stats);
 185 }
 186
 187 }  // namespace cc