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+/*
+ * Copyright 2009, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+
+// This file contains the declaration of the EffectParamGL and EffectGL classes.
+
+#ifndef GPU_COMMAND_BUFFER_SERVICE_CROSS_GL_EFFECT_GL_H_
+#define GPU_COMMAND_BUFFER_SERVICE_CROSS_GL_EFFECT_GL_H_
+
+#include <vector>
+
+#include "command_buffer/common/gapi_interface.h"
+#include "command_buffer/service/resource.h"
+#include "command_buffer/service/gl_utils.h"
+
+namespace command_buffer {
+namespace o3d {
+
+class GAPIGL;
+class EffectGL;
+
+// GL version of EffectParam.
+class EffectParamGL: public EffectParam {
+ public:
+  EffectParamGL(effect_param::DataType data_type,
+                EffectGL *effect,
+                unsigned int param_index);
+  virtual ~EffectParamGL();
+
+  // Sets the data into the GL effect parameter.
+  bool SetData(GAPIGL *gapi, unsigned int size, const void * data);
+
+  // Gets the description of the parameter.
+  bool GetDesc(unsigned int size, void *data);
+
+  // Resets the effect back-pointer. This is called when the effect gets
+  // destroyed, to invalidate the parameter.
+  void ResetEffect() { effect_ = NULL; }
+
+  // Creates an EffectParamGL from the EffectGL, by index.
+  static EffectParamGL *Create(EffectGL *effect,
+                               unsigned int index);
+ private:
+  EffectGL *effect_;
+  unsigned int low_level_param_index_;
+  DISALLOW_COPY_AND_ASSIGN(EffectParamGL);
+};
+
+// GL version of Effect.
+class EffectGL : public Effect {
+ public:
+  EffectGL(CGprogram vertex_program,
+           CGprogram fragment_program);
+  virtual ~EffectGL();
+
+  // Compiles and creates an effect from source code.
+  static EffectGL *Create(GAPIGL *gapi,
+                          const String &effect_code,
+                          const String &vertex_program_entry,
+                          const String &fragment_program_entry);
+
+  // Applies the effect states (vertex shader, pixel shader) to GL.
+  bool Begin(GAPIGL *gapi);
+
+  // Resets the effect states (vertex shader, pixel shader) to GL.
+  void End(GAPIGL *gapi);
+
+  // Gets the number of parameters in the effect.
+  unsigned int GetParamCount() const;
+
+  // Gets the number of streams in the effect.
+  unsigned int GetStreamCount() const;
+
+  // Creates an effect parameter with the specified index.
+  EffectParamGL *CreateParam(unsigned int index);
+
+  // Gets the stream data with the specified index.
+  bool GetStreamDesc(unsigned int index, unsigned int size, void *data);
+
+  // Creates an effect parameter of the specified name.
+  EffectParamGL *CreateParamByName(const char *name);
+
+ private:
+  struct LowLevelParam {
+    const char *name;
+    CGparameter vp_param;
+    CGparameter fp_param;
+    int num_elements;
+    std::vector<ResourceId> sampler_ids;
+  };
+  typedef std::vector<LowLevelParam> LowLevelParamList;
+  typedef std::vector<EffectParamGL *> ParamList;
+  typedef std::vector<effect_stream::Desc> StreamList;
+
+  static CGparameter GetEitherCgParameter(
+      const LowLevelParam &low_level_param) {
+    return low_level_param.vp_param ?
+        low_level_param.vp_param : low_level_param.fp_param;
+  }
+
+  int GetLowLevelParamIndexByName(const char *name);
+  void AddLowLevelParams(CGprogram prog, CGenum name_space, bool vp);
+  void AddStreams(CGprogram prog, CGenum name_space);
+
+  // Creates the low level structures.
+  void Initialize();
+
+  // Links a param into this effect.
+  void LinkParam(EffectParamGL *param);
+
+  // Unlinks a param into this effect.
+  void UnlinkParam(EffectParamGL *param);
+
+  CGprogram vertex_program_;
+  CGprogram fragment_program_;
+  // List of all the Params created.
+  ParamList params_;
+  StreamList streams_;
+  // List of all the Cg parameters present in either the vertex program or the
+  // fragment program.
+  LowLevelParamList low_level_params_;
+
+  // List of the indices of the low level params that are samplers.
+  std::vector<unsigned int> sampler_params_;
+  bool update_samplers_;
+
+  friend class EffectParamGL;
+  DISALLOW_COPY_AND_ASSIGN(EffectGL);
+};
+
+}  // namespace o3d
+}  // namespace command_buffer
+
+#endif  // GPU_COMMAND_BUFFER_SERVICE_CROSS_GL_EFFECT_GL_H_