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      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 // Whole-tree processing that's likely to be helpful in multiple render models.
      6 
      7 #ifndef GPU_TOOLS_COMPOSITOR_MODEL_BENCH_RENDER_MODEL_UTILS_H_
      8 #define GPU_TOOLS_COMPOSITOR_MODEL_BENCH_RENDER_MODEL_UTILS_H_
      9 
     10 #include <map>
     11 #include <set>
     12 #include <vector>
     13 
     14 #include "base/compiler_specific.h"
     15 #include "base/memory/scoped_ptr.h"
     16 #include "gpu/tools/compositor_model_bench/render_tree.h"
     17 
     18 // This is a visitor that runs over the tree structure that was built from the
     19 // configuration file. It creates OpenGL textures (random checkerboards) that
     20 // match the specifications of the original textures and overwrites the old
     21 // texture ID's in the tree, replacing them with the matching new textures.
     22 class TextureGenerator : public RenderNodeVisitor {
     23  public:
     24   typedef scoped_ptr<uint8[]> ImagePtr;
     25   typedef std::vector<Tile>::iterator tile_iter;
     26 
     27   explicit TextureGenerator(RenderNode* root);
     28   virtual ~TextureGenerator() OVERRIDE;
     29 
     30   // RenderNodeVisitor functions look for textures and pass them
     31   // off to HandleTexture (which behaves appropriately depending
     32   // on which pass we are in.)
     33   virtual void BeginVisitRenderNode(RenderNode* node) OVERRIDE;
     34   virtual void BeginVisitCCNode(CCNode* node) OVERRIDE;
     35 
     36  private:
     37   enum TextureGenStage {
     38     DiscoveryStage,
     39     RemappingStage,
     40     ImageGenerationStage
     41   };
     42 
     43   void DiscoverInputIDs(RenderNode* root);
     44   void GenerateGLTexIDs();
     45   void AssignIDMapping();
     46   void WriteOutNewIDs(RenderNode* root);
     47   void AllocateImageArray();
     48   void BuildTextureImages(RenderNode* root);
     49   void HandleTexture(int* texID, int width, int height, GLenum format);
     50   void GenerateImageForTexture(int texID, int width, int height, GLenum format);
     51 
     52   TextureGenStage stage_;
     53   std::set<int> discovered_ids_;
     54   scoped_ptr<GLuint[]> tex_ids_;
     55   std::map<int, int> remapped_ids_;
     56   scoped_ptr<ImagePtr[]> image_data_;
     57   int images_generated_;
     58   std::set<int> ids_for_completed_textures_;
     59 };
     60 
     61 #endif  // GPU_TOOLS_COMPOSITOR_MODEL_BENCH_RENDER_MODEL_UTILS_H_
     62 
     63