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   void BeginVisitRenderNode(RenderNode* v) override { NOTREACHED(); }
  19
  20   void BeginVisitCCNode(CCNode* v) override {
  21     if (!v->drawsContent())
  22       return;
  23     ConfigAndActivateShaderForNode(v);
  24     DrawQuad(v->width(), v->height());
  25   }
  26
  27   void BeginVisitContentLayerNode(ContentLayerNode* l) override {
  28     if (!l->drawsContent())
  29       return;
  30     ConfigAndActivateShaderForTiling(l);
  31     // Now that we capture root layer tiles, a layer without tiles
  32     // should not get drawn.
  33     for (size_t n = 0; n < l->num_tiles(); ++n) {
  34       const Tile* i = l->tile(n);
  35       DrawTileQuad(i->texID, i->x, i->y);
  36     }
  37   }
  38 };
  39
  40 ForwardRenderSimulator::ForwardRenderSimulator(RenderNode* root,
  41                                                int window_width,
  42                                                int window_height)
  43     : RenderModelSimulator(root) {
  44   textures_.reset(new TextureGenerator(root));
  45   visitor_.reset(new ForwardRenderNodeVisitor());
  46   glViewport(0, 0, window_width, window_height);
  47   glDisable(GL_DEPTH_TEST);
  48   glDisable(GL_CULL_FACE);
  49   glEnable(GL_BLEND);
  50   glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
  51 }
  52
  53 ForwardRenderSimulator::~ForwardRenderSimulator() {
  54 }
  55
  56 void ForwardRenderSimulator::Update() {
  57   glClearColor(0, 0, 1, 1);
  58   glColorMask(true, true, true, true);
  59   glClear(GL_COLOR_BUFFER_BIT);
  60   glColorMask(true, true, true, false);
  61   BeginFrame();
  62   root_->Accept(visitor_.get());
  63 }
  64
  65 void ForwardRenderSimulator::Resize(int width, int height) {
  66   glViewport(0, 0, width, height);
  67 }
  68