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/string_util.h"
  13 #include "base/strings/string_split.h"
  14 #include "cc/output/compositor_frame.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 "third_party/khronos/GLES2/gl2ext.h"
  26
  27 using WebKit::WebGraphicsContext3D;
  28
  29 namespace cc {
  30
  31 scoped_ptr<DelegatingRenderer> DelegatingRenderer::Create(
  32     RendererClient* client,
  33     OutputSurface* output_surface,
  34     ResourceProvider* resource_provider) {
  35   scoped_ptr<DelegatingRenderer> renderer(
  36       new DelegatingRenderer(client, output_surface, resource_provider));
  37   if (!renderer->Initialize())
  38     return scoped_ptr<DelegatingRenderer>();
  39   return renderer.Pass();
  40 }
  41
  42 DelegatingRenderer::DelegatingRenderer(
  43     RendererClient* client,
  44     OutputSurface* output_surface,
  45     ResourceProvider* resource_provider)
  46     : Renderer(client),
  47       output_surface_(output_surface),
  48       resource_provider_(resource_provider),
  49       visible_(true) {
  50   DCHECK(resource_provider_);
  51 }
  52
  53 bool DelegatingRenderer::Initialize() {
  54   capabilities_.using_partial_swap = false;
  55   // TODO(danakj): Throttling - we may want to only allow 1 outstanding frame,
  56   // but the parent compositor may pipeline for us.
  57   // TODO(danakj): Can we use this in single-thread mode?
  58   capabilities_.using_swap_complete_callback = true;
  59   capabilities_.max_texture_size = resource_provider_->max_texture_size();
  60   capabilities_.best_texture_format = resource_provider_->best_texture_format();
  61   capabilities_.allow_partial_texture_updates = false;
  62
  63   WebGraphicsContext3D* context3d = resource_provider_->GraphicsContext3D();
  64
  65   if (!context3d) {
  66     // Software compositing.
  67     return true;
  68   }
  69
  70   if (!context3d->makeContextCurrent())
  71     return false;
  72
  73   context3d->setContextLostCallback(this);
  74   context3d->pushGroupMarkerEXT("CompositorContext");
  75
  76   std::string extensions_string =
  77       UTF16ToASCII(context3d->getString(GL_EXTENSIONS));
  78
  79   std::vector<std::string> extensions;
  80   base::SplitString(extensions_string, ' ', &extensions);
  81
  82   // TODO(danakj): We need non-GPU-specific paths for these things. This
  83   // renderer shouldn't need to use context3d extensions directly.
  84   bool has_read_bgra = true;
  85   bool has_set_visibility = true;
  86   bool has_io_surface = true;
  87   bool has_arb_texture_rect = true;
  88   bool has_egl_image = true;
  89   for (size_t i = 0; i < extensions.size(); ++i) {
  90     if (extensions[i] == "GL_EXT_read_format_bgra")
  91       has_read_bgra = true;
  92     else if (extensions[i] == "GL_CHROMIUM_set_visibility")
  93       has_set_visibility = true;
  94     else if (extensions[i] == "GL_CHROMIUM_iosurface")
  95       has_io_surface = true;
  96     else if (extensions[i] == "GL_ARB_texture_rectangle")
  97       has_arb_texture_rect = true;
  98     else if (extensions[i] == "GL_OES_EGL_image_external")
  99       has_egl_image = true;
 100   }
 101
 102   if (has_io_surface)
 103     DCHECK(has_arb_texture_rect);
 104
 105   capabilities_.using_accelerated_painting =
 106       Settings().accelerate_painting &&
 107       capabilities_.best_texture_format == GL_BGRA_EXT &&
 108       has_read_bgra;
 109
 110   // TODO(piman): loop visibility to GPU process?
 111   capabilities_.using_set_visibility = has_set_visibility;
 112
 113   // TODO(danakj): Support GpuMemoryManager.
 114   capabilities_.using_gpu_memory_manager = false;
 115
 116   capabilities_.using_egl_image = has_egl_image;
 117
 118   return true;
 119 }
 120
 121 DelegatingRenderer::~DelegatingRenderer() {
 122   WebGraphicsContext3D* context3d = resource_provider_->GraphicsContext3D();
 123   if (context3d)
 124     context3d->setContextLostCallback(NULL);
 125 }
 126
 127 const RendererCapabilities& DelegatingRenderer::Capabilities() const {
 128   return capabilities_;
 129 }
 130
 131 static ResourceProvider::ResourceId AppendToArray(
 132     ResourceProvider::ResourceIdArray* array,
 133     ResourceProvider::ResourceId id) {
 134   array->push_back(id);
 135   return id;
 136 }
 137
 138 void DelegatingRenderer::DrawFrame(
 139     RenderPassList* render_passes_in_draw_order) {
 140   TRACE_EVENT0("cc", "DelegatingRenderer::DrawFrame");
 141
 142   CompositorFrame out_frame;
 143   out_frame.metadata = client_->MakeCompositorFrameMetadata();
 144
 145   out_frame.delegated_frame_data = make_scoped_ptr(new DelegatedFrameData);
 146
 147   // Collect all resource ids in the render passes into a ResourceIdArray.
 148   ResourceProvider::ResourceIdArray resources;
 149   DrawQuad::ResourceIteratorCallback append_to_array =
 150       base::Bind(&AppendToArray, &resources);
 151   for (size_t i = 0; i < render_passes_in_draw_order->size(); ++i) {
 152     RenderPass* render_pass = render_passes_in_draw_order->at(i);
 153     for (size_t j = 0; j < render_pass->quad_list.size(); ++j)
 154       render_pass->quad_list[j]->IterateResources(append_to_array);
 155   }
 156
 157   // Move the render passes and resources into the |out_frame|.
 158   DelegatedFrameData& out_data = *out_frame.delegated_frame_data;
 159   out_data.render_pass_list.swap(*render_passes_in_draw_order);
 160   resource_provider_->PrepareSendToParent(resources, &out_data.resource_list);
 161
 162   output_surface_->SendFrameToParentCompositor(&out_frame);
 163 }
 164
 165 bool DelegatingRenderer::SwapBuffers() {
 166   return true;
 167 }
 168
 169 void DelegatingRenderer::GetFramebufferPixels(void* pixels, gfx::Rect rect) {
 170   NOTIMPLEMENTED();
 171 }
 172
 173 void DelegatingRenderer::ReceiveCompositorFrameAck(
 174     const CompositorFrameAck& ack) {
 175   resource_provider_->ReceiveFromParent(ack.resources);
 176   if (client_->HasImplThread())
 177     client_->OnSwapBuffersComplete();
 178 }
 179
 180
 181 bool DelegatingRenderer::IsContextLost() {
 182   WebGraphicsContext3D* context3d = resource_provider_->GraphicsContext3D();
 183   if (!context3d)
 184     return false;
 185   return context3d->getGraphicsResetStatusARB() != GL_NO_ERROR;
 186 }
 187
 188 void DelegatingRenderer::SetVisible(bool visible) {
 189   visible_ = visible;
 190 }
 191
 192 void DelegatingRenderer::onContextLost() {
 193   client_->DidLoseOutputSurface();
 194 }
 195
 196 }  // namespace cc