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// Copyright (c) 2011 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// Whole-tree processing that's likely to be helpful in multiple render models.
#ifndef GPU_TOOLS_COMPOSITOR_MODEL_BENCH_RENDER_MODEL_UTILS_H_
#define GPU_TOOLS_COMPOSITOR_MODEL_BENCH_RENDER_MODEL_UTILS_H_
#include <map>
#include <set>
#include <vector>
#include "base/compiler_specific.h"
#include "base/memory/scoped_ptr.h"
#include "gpu/tools/compositor_model_bench/render_tree.h"
// This is a visitor that runs over the tree structure that was built from the
// configuration file. It creates OpenGL textures (random checkerboards) that
// match the specifications of the original textures and overwrites the old
// texture ID's in the tree, replacing them with the matching new textures.
class TextureGenerator : public RenderNodeVisitor {
public:
typedef scoped_array<uint8> ImagePtr;
typedef std::vector<Tile>::iterator tile_iter;
explicit TextureGenerator(RenderNode* root);
virtual ~TextureGenerator() OVERRIDE;
// RenderNodeVisitor functions look for textures and pass them
// off to HandleTexture (which behaves appropriately depending
// on which pass we are in.)
virtual void BeginVisitRenderNode(RenderNode* node) OVERRIDE;
virtual void BeginVisitCCNode(CCNode* node) OVERRIDE;
private:
enum TextureGenStage {
DiscoveryStage,
RemappingStage,
ImageGenerationStage
};
void DiscoverInputIDs(RenderNode* root);
void GenerateGLTexIDs();
void AssignIDMapping();
void WriteOutNewIDs(RenderNode* root);
void AllocateImageArray();
void BuildTextureImages(RenderNode* root);
void HandleTexture(int* texID, int width, int height, GLenum format);
void GenerateImageForTexture(int texID, int width, int height, GLenum format);
TextureGenStage stage_;
std::set<int> discovered_ids_;
scoped_array<GLuint> tex_ids_;
std::map<int, int> remapped_ids_;
scoped_array<ImagePtr> image_data_;
int images_generated_;
std::set<int> ids_for_completed_textures_;
};
#endif // GPU_TOOLS_COMPOSITOR_MODEL_BENCH_RENDER_MODEL_UTILS_H_
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