Initial checkin of the compositor_model_bench tool, which simulates the GPU demands of Chromium's...

gpu/tools/compositor_model_bench/render_tree.h

Index: gpu/tools/compositor_model_bench/render_tree.h
===================================================================
--- gpu/tools/compositor_model_bench/render_tree.h	(revision 0)
+++ gpu/tools/compositor_model_bench/render_tree.h	(revision 0)
@@ -0,0 +1,218 @@
+// 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.
+
+// Data structures for representing parts of Chromium's composited layer tree
+// and a function to load it from the JSON configuration file
+
+#ifndef GPU_TOOLS_COMPOSITOR_MODEL_BENCH_RENDER_TREE_H_
+#define GPU_TOOLS_COMPOSITOR_MODEL_BENCH_RENDER_TREE_H_
+
+#include <string>
+#include <vector>
+
+#include "base/compiler_specific.h"
+#include "base/memory/scoped_vector.h"
+#include "gpu/tools/compositor_model_bench/shaders.h"
+#include "ui/gfx/gl/gl_bindings.h"
+#include "ui/gfx/gl/gl_implementation.h"
+
+// These are fairly arbitrary values based on how big my actual browser
+// window was.
+const int WINDOW_WIDTH = 1609;
+const int WINDOW_HEIGHT = 993;
+
+struct Tile {
+  int x;
+  int y;
+  int texID;
+};
+
+struct Texture {
+  int texID;
+  int height;
+  int width;
+  GLenum format;
+};
+
+GLenum TextureFormatFromString(std::string format);
+const char* TextureFormatName(GLenum format);
+int FormatBytesPerPixel(GLenum format);
+
+struct RenderNodeVisitor;
+
+class RenderNode {
+ public:
+  RenderNode() {}
+  virtual ~RenderNode() {}
+  virtual void Accept(RenderNodeVisitor* v);
+
+  int layerID() {
+    return layerID_;
+  }
+
+  void set_layerID(int id) {
+    layerID_ = id;
+  }
+
+  int width() {
+    return width_;
+  }
+
+  void set_width(int width) {
+    width_ = width;
+  }
+
+  int height() {
+    return height_;
+  }
+
+  void set_height(int height) {
+    height_ = height;
+  }
+
+  bool drawsContent() {
+    return drawsContent_;
+  }
+
+  void set_drawsContent(bool draws) {
+    drawsContent_ = draws;
+  }
+
+  void set_targetSurface(int surface) {
+    targetSurface_ = surface;
+  }
+
+  float* transform() {
+    return transform_;
+  }
+
+  void set_transform(float* mat) {
+    memcpy(reinterpret_cast<void*>(transform_),
+           reinterpret_cast<void*>(mat),
+           16 * sizeof(transform_[0]));
+  }
+
+  void add_tile(Tile t) {
+    tiles_.push_back(t);
+  }
+
+  size_t num_tiles() {
+    return tiles_.size();
+  }
+
+  Tile* tile(size_t index) {
+    return &tiles_[index];
+  }
+
+  int tile_width() {
+    return tile_width_;
+  }
+
+  void set_tile_width(int width) {
+    tile_width_ = width;
+  }
+
+  int tile_height() {
+    return tile_height_;
+  }
+
+  void set_tile_height(int height) {
+    tile_height_ = height;
+  }
+
+ private:
+  int layerID_;
+  int width_;
+  int height_;
+  bool drawsContent_;
+  int targetSurface_;
+  float transform_[16];
+  std::vector<Tile> tiles_;
+  int tile_width_;
+  int tile_height_;
+};
+
+class ContentLayerNode : public RenderNode {
+ public:
+  ContentLayerNode() {}
+  virtual void Accept(RenderNodeVisitor* v) OVERRIDE;
+
+  void set_skipsDraw(bool skips) {
+    skipsDraw_ = skips;
+  }
+
+  void add_child(RenderNode* child) {
+    children_.push_back(child);
+  }
+
+ private:
+  ScopedVector<RenderNode> children_;
+  bool skipsDraw_;
+};
+
+class CCNode : public RenderNode {
+ public:
+  CCNode() {}
+
+  virtual void Accept(RenderNodeVisitor* v) OVERRIDE;
+
+  ShaderID vertex_shader() {
+    return vertex_shader_;
+  }
+
+  void set_vertex_shader(ShaderID shader) {
+    vertex_shader_ = shader;
+  }
+
+  ShaderID fragment_shader() {
+    return fragment_shader_;
+  }
+
+  void set_fragment_shader(ShaderID shader) {
+    fragment_shader_ = shader;
+  }
+
+  void add_texture(Texture t) {
+    textures_.push_back(t);
+  }
+
+  size_t num_textures() {
+    return textures_.size();
+  }
+
+  Texture* texture(size_t index) {
+    return &textures_[index];
+  }
+
+ private:
+  ShaderID vertex_shader_;
+  ShaderID fragment_shader_;
+  std::vector<Texture> textures_;
+};
+
+class RenderNodeVisitor {
+ public:
+  virtual ~RenderNodeVisitor() {}
+
+  virtual void BeginVisitRenderNode(RenderNode* v) = 0;
+  virtual void BeginVisitContentLayerNode(ContentLayerNode* v) {
+    this->BeginVisitRenderNode(v);
+  }
+  virtual void BeginVisitCCNode(CCNode* v) {
+    this->BeginVisitRenderNode(v);
+  }
+
+  virtual void EndVisitRenderNode(RenderNode* v) {}
+  virtual void EndVisitContentLayerNode(ContentLayerNode* v) {
+    this->EndVisitRenderNode(v);
+  }
+  virtual void EndVisitCCNode(CCNode* v) {
+    this->EndVisitRenderNode(v);
+  }
+};
+
+RenderNode* BuildRenderTreeFromFile(const FilePath& path);
+
+#endif  // GPU_TOOLS_COMPOSITOR_MODEL_BENCH_RENDER_TREE_H_
+