Home | History | Annotate | Download | only in compositor_model_bench 
      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 
     71