gpu/tools/compositor_model_bench/forward_render_model.cc

   1 // Copyright (c) 2011 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 "gpu/tools/compositor_model_bench/forward_render_model.h"
   6
   7 #include <cstdlib>
   8 #include <vector>
   9
  10 #include "gpu/tools/compositor_model_bench/render_model_utils.h"
  11
  12 using std::vector;
  13
  14 class ForwardRenderNodeVisitor : public RenderNodeVisitor {
  15  public:
  16   ForwardRenderNodeVisitor() {}
  17
  18   virtual void BeginVisitRenderNode(RenderNode* v) OVERRIDE {
  19     NOTREACHED();
  20   }
  21
  22   virtual void BeginVisitCCNode(CCNode* v) OVERRIDE {
  23     if (!v->drawsContent())
  24       return;
  25     ConfigAndActivateShaderForNode(v);
  26     DrawQuad(v->width(), v->height());
  27   }
  28
  29   virtual void BeginVisitContentLayerNode(ContentLayerNode* l) OVERRIDE {
  30     if (!l->drawsContent())
  31       return;
  32     ConfigAndActivateShaderForTiling(l);
  33     // Now that we capture root layer tiles, a layer without tiles
  34     // should not get drawn.
  35     for (size_t n = 0; n < l->num_tiles(); ++n) {
  36       const Tile* i = l->tile(n);
  37       DrawTileQuad(i->texID, i->x, i->y);
  38     }
  39   }
  40 };
  41
  42 ForwardRenderSimulator::ForwardRenderSimulator(RenderNode* root,
  43                                                int window_width,
  44                                                int window_height)
  45     : RenderModelSimulator(root) {
  46   textures_.reset(new TextureGenerator(root));
  47   visitor_.reset(new ForwardRenderNodeVisitor());
  48   glViewport(0, 0, window_width, window_height);
  49   glDisable(GL_DEPTH_TEST);
  50   glDisable(GL_CULL_FACE);
  51   glEnable(GL_BLEND);
  52   glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
  53 }
  54
  55 ForwardRenderSimulator::~ForwardRenderSimulator() {
  56 }
  57
  58 void ForwardRenderSimulator::Update() {
  59   glClearColor(0, 0, 1, 1);
  60   glColorMask(true, true, true, true);
  61   glClear(GL_COLOR_BUFFER_BIT);
  62   glColorMask(true, true, true, false);
  63   BeginFrame();
  64   root_->Accept(visitor_.get());
  65 }
  66
  67 void ForwardRenderSimulator::Resize(int width, int height) {
  68   glViewport(0, 0, width, height);
  69 }
  70