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

gpu/tools/compositor_model_bench/render_tree.h

+// 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:
+  virtual ~RenderNode() {}
+  int layerID;

[piman, 2011/08/26 02:24:16]

according to our style, classes are not supposed to have public members. You can
make them private (and fix the namimg, e.g. layer_id_) and add accessors as
appropriate.
Same with other classes below.

+  int width;
+  int height;
+  bool drawsContent;
+  int targetSurface;
+  float transform[16];
+  std::vector<Tile> tiles;
+  int tile_width;
+  int tile_height;
+
+  virtual void Accept(RenderNodeVisitor* v);
+};
+
+class ContentLayerNode : public RenderNode {
+ public:
+  ScopedVector<RenderNode> children;
+  bool skipsDraw;
+
+  virtual void Accept(RenderNodeVisitor* v) OVERRIDE;
+};
+
+class CCNode : public RenderNode {
+ public:
+  ShaderID vertex_shader;
+  ShaderID fragment_shader;
+  std::vector<Texture> textures;
+
+  virtual void Accept(RenderNodeVisitor* v) OVERRIDE;
+};
+
+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_
+