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 "cc/output/compositor_frame_ack.h"
  15 #include "cc/quads/checkerboard_draw_quad.h"
  16 #include "cc/quads/debug_border_draw_quad.h"
  17 #include "cc/quads/render_pass.h"
  18 #include "cc/quads/render_pass_draw_quad.h"
  19 #include "cc/quads/solid_color_draw_quad.h"
  20 #include "cc/quads/texture_draw_quad.h"
  21 #include "cc/quads/tile_draw_quad.h"
  22 #include "cc/quads/yuv_video_draw_quad.h"
  23 #include "cc/resources/resource_provider.h"
  24 #include "third_party/khronos/GLES2/gl2ext.h"
  25
  26 using WebKit::WebGraphicsContext3D;
  27
  28 namespace cc {
  29
  30 scoped_ptr<DelegatingRenderer> DelegatingRenderer::Create(
  31     RendererClient* client,
  32     OutputSurface* output_surface,
  33     ResourceProvider* resource_provider) {
  34   scoped_ptr<DelegatingRenderer> renderer(
  35       new DelegatingRenderer(client, output_surface, resource_provider));
  36   if (!renderer->Initialize())
  37     return scoped_ptr<DelegatingRenderer>();
  38   return renderer.Pass();
  39 }
  40
  41 DelegatingRenderer::DelegatingRenderer(
  42     RendererClient* client,
  43     OutputSurface* output_surface,
  44     ResourceProvider* resource_provider)
  45     : Renderer(client),
  46       output_surface_(output_surface),
  47       resource_provider_(resource_provider),
  48       visible_(true) {
  49   DCHECK(resource_provider_);
  50 }
  51
  52 bool DelegatingRenderer::Initialize() {
  53   capabilities_.using_partial_swap = false;
  54   // TODO(danakj): Throttling - we may want to only allow 1 outstanding frame,
  55   // but the parent compositor may pipeline for us.
  56   capabilities_.max_texture_size = resource_provider_->max_texture_size();
  57   capabilities_.best_texture_format = resource_provider_->best_texture_format();
  58   capabilities_.allow_partial_texture_updates = false;
  59   capabilities_.using_offscreen_context3d = false;
  60
  61   WebGraphicsContext3D* context3d = resource_provider_->GraphicsContext3D();
  62
  63   if (!context3d) {
  64     // Software compositing.
  65     return true;
  66   }
  67
  68   if (!context3d->makeContextCurrent())
  69     return false;
  70
  71   context3d->pushGroupMarkerEXT("CompositorContext");
  72
  73   std::string extensions_string =
  74       UTF16ToASCII(context3d->getString(GL_EXTENSIONS));
  75
  76   std::vector<std::string> extensions;
  77   base::SplitString(extensions_string, ' ', &extensions);
  78
  79   // TODO(danakj): We need non-GPU-specific paths for these things. This
  80   // renderer shouldn't need to use context3d extensions directly.
  81   bool has_set_visibility = false;
  82   bool has_io_surface = false;
  83   bool has_arb_texture_rect = false;
  84   bool has_egl_image = false;
  85   bool has_map_image = false;
  86   for (size_t i = 0; i < extensions.size(); ++i) {
  87     if (extensions[i] == "GL_CHROMIUM_set_visibility") {
  88       has_set_visibility = true;
  89     } else if (extensions[i] == "GL_CHROMIUM_iosurface") {
  90       has_io_surface = true;
  91     } else if (extensions[i] == "GL_ARB_texture_rectangle") {
  92         has_arb_texture_rect = true;
  93     } else if (extensions[i] == "GL_OES_EGL_image_external") {
  94         has_egl_image = true;
  95     } else if (extensions[i] == "GL_CHROMIUM_map_image") {
  96       has_map_image = true;
  97     }
  98   }
  99
 100   if (has_io_surface)
 101     DCHECK(has_arb_texture_rect);
 102
 103   // TODO(piman): loop visibility to GPU process?
 104   capabilities_.using_set_visibility = has_set_visibility;
 105
 106   // TODO(danakj): Support GpuMemoryManager.
 107   capabilities_.using_gpu_memory_manager = false;
 108
 109   capabilities_.using_egl_image = has_egl_image;
 110
 111   capabilities_.using_map_image = has_map_image;
 112
 113   return true;
 114 }
 115
 116 DelegatingRenderer::~DelegatingRenderer() {}
 117
 118 const RendererCapabilities& DelegatingRenderer::Capabilities() const {
 119   return capabilities_;
 120 }
 121
 122 bool DelegatingRenderer::CanReadPixels() const { return false; }
 123
 124 static ResourceProvider::ResourceId AppendToArray(
 125     ResourceProvider::ResourceIdArray* array,
 126     ResourceProvider::ResourceId id) {
 127   array->push_back(id);
 128   return id;
 129 }
 130
 131 void DelegatingRenderer::DrawFrame(
 132     RenderPassList* render_passes_in_draw_order) {
 133   TRACE_EVENT0("cc", "DelegatingRenderer::DrawFrame");
 134
 135   DCHECK(!frame_for_swap_buffers_.delegated_frame_data);
 136
 137   frame_for_swap_buffers_.metadata = client_->MakeCompositorFrameMetadata();
 138
 139   frame_for_swap_buffers_.delegated_frame_data =
 140       make_scoped_ptr(new DelegatedFrameData);
 141   DelegatedFrameData& out_data = *frame_for_swap_buffers_.delegated_frame_data;
 142   // Move the render passes and resources into the |out_frame|.
 143   out_data.render_pass_list.swap(*render_passes_in_draw_order);
 144
 145   // Collect all resource ids in the render passes into a ResourceIdArray.
 146   ResourceProvider::ResourceIdArray resources;
 147   DrawQuad::ResourceIteratorCallback append_to_array =
 148       base::Bind(&AppendToArray, &resources);
 149   for (size_t i = 0; i < out_data.render_pass_list.size(); ++i) {
 150     RenderPass* render_pass = out_data.render_pass_list.at(i);
 151     for (size_t j = 0; j < render_pass->quad_list.size(); ++j)
 152       render_pass->quad_list[j]->IterateResources(append_to_array);
 153   }
 154   resource_provider_->PrepareSendToParent(resources, &out_data.resource_list);
 155 }
 156
 157 void DelegatingRenderer::SwapBuffers() {
 158   TRACE_EVENT0("cc", "DelegatingRenderer::SwapBuffers");
 159
 160   output_surface_->SwapBuffers(&frame_for_swap_buffers_);
 161   frame_for_swap_buffers_.delegated_frame_data.reset();
 162 }
 163
 164 void DelegatingRenderer::GetFramebufferPixels(void* pixels, gfx::Rect rect) {
 165   NOTREACHED();
 166 }
 167
 168 void DelegatingRenderer::ReceiveSwapBuffersAck(
 169     const CompositorFrameAck& ack) {
 170   resource_provider_->ReceiveFromParent(ack.resources);
 171 }
 172
 173
 174 bool DelegatingRenderer::IsContextLost() {
 175   WebGraphicsContext3D* context3d = resource_provider_->GraphicsContext3D();
 176   if (!context3d)
 177     return false;
 178   return context3d->getGraphicsResetStatusARB() != GL_NO_ERROR;
 179 }
 180
 181 void DelegatingRenderer::SetVisible(bool visible) {
 182   visible_ = visible;
 183 }
 184
 185 }  // namespace cc