Adds texture tracking.

I need to add a bunch more unit tests for the TextureManager
but this CL is getting large so if you don't mind I'll
do that in the next CL.

I still need to use the texture tracking at draw time but 
that's going to  require uniform tracking! UGH!

Also breaks out a bunch of the tracking classes into their own files.

TEST=none
BUG=none

Review URL: http://codereview.chromium.org/605018

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@39153 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 72 insertions, 0 deletions

diff --git a/gpu/command_buffer/service/shader_manager.h b/gpu/command_buffer/service/shader_manager.h
new file mode 100644
index 0000000..833117b
--- /dev/null
+++ b/gpu/command_buffer/service/shader_manager.h
@@ -0,0 +1,72 @@
+// Copyright (c) 2010 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.
+
+#ifndef GPU_COMMAND_BUFFER_SERVICE_SHADER_MANAGER_H_
+#define GPU_COMMAND_BUFFER_SERVICE_SHADER_MANAGER_H_
+
+#include <map>
+#include <string>
+#include "base/basictypes.h"
+#include "gpu/command_buffer/service/gl_utils.h"
+
+namespace gpu {
+namespace gles2 {
+
+// Tracks the Shaders.
+//
+// NOTE: To support shared resources an instance of this class will
+// need to be shared by multiple GLES2Decoders.
+class ShaderManager {
+ public:
+  // This is used to keep the source code for a shader. This is because in order
+  // to emluate GLES2 the shaders will have to be re-written before passed to
+  // the underlying OpenGL. But, when the user calls glGetShaderSource they
+  // should get the source they passed in, not the re-written source.
+  class ShaderInfo {
+   public:
+    explicit ShaderInfo(GLuint shader)
+        : shader_(shader) {
+    }
+
+    void Update(const std::string& source) {
+      source_ = source;
+    }
+
+    const std::string& source() {
+      return source_;
+    }
+
+   private:
+    // The shader this ShaderInfo is tracking.
+    GLuint shader_;
+
+    // The shader source as passed to glShaderSource.
+    std::string source_;
+  };
+
+  ShaderManager() { };
+
+  // Creates a shader info for the given shader ID.
+  void CreateShaderInfo(GLuint shader);
+
+  // Gets an existing shader info for the given shader ID. Returns NULL if none
+  // exists.
+  ShaderInfo* GetShaderInfo(GLuint shader);
+
+  // Deletes the shader info for the given shader.
+  void RemoveShaderInfo(GLuint shader);
+
+ private:
+  // Info for each shader by service side shader Id.
+  typedef std::map<GLuint, ShaderInfo> ShaderInfoMap;
+  ShaderInfoMap shader_infos_;
+
+  DISALLOW_COPY_AND_ASSIGN(ShaderManager);
+};
+
+}  // namespace gles2
+}  // namespace gpu
+
+#endif  // GPU_COMMAND_BUFFER_SERVICE_SHADER_MANAGER_H_
+