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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 O3D_COMMAND_BUFFER_SERVICE_CROSS_GL_EFFECT_GL_H_
#define O3D_COMMAND_BUFFER_SERVICE_CROSS_GL_EFFECT_GL_H_
#include <vector>
#include "command_buffer/common/cross/gapi_interface.h"
#include "command_buffer/service/cross/resource.h"
#include "command_buffer/service/cross/gl/gl_utils.h"
namespace o3d {
namespace command_buffer {
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 command_buffer
} // namespace o3d
#endif // O3D_COMMAND_BUFFER_SERVICE_CROSS_GL_EFFECT_GL_H_
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