include/render/orxShader.h

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/* Orx - Portable Game Engine
 *
 * Copyright (c) 2008-2011 Orx-Project
 *
 * This software is provided 'as-is', without any express or implied
 * warranty. In no event will the authors be held liable for any damages
 * arising from the use of this software.
 *
 * Permission is granted to anyone to use this software for any purpose,
 * including commercial applications, and to alter it and redistribute it
 * freely, subject to the following restrictions:
 *
 *    1. The origin of this software must not be misrepresented; you must not
 *    claim that you wrote the original software. If you use this software
 *    in a product, an acknowledgment in the product documentation would be
 *    appreciated but is not required.
 *
 *    2. Altered source versions must be plainly marked as such, and must not be
 *    misrepresented as being the original software.
 *
 *    3. This notice may not be removed or altered from any source
 *    distribution.
 */

#ifndef _orxSHADER_H_
#define _orxSHADER_H_


#include "orxInclude.h"
#include "math/orxVector.h"
#include "display/orxTexture.h"
#include "object/orxObject.h"
#include "utils/orxLinkList.h"


typedef enum __orxSHADER_PARAM_TYPE_t
{
  orxSHADER_PARAM_TYPE_FLOAT = 0,
  orxSHADER_PARAM_TYPE_TEXTURE,
  orxSHADER_PARAM_TYPE_VECTOR,

  orxSHADER_PARAM_TYPE_NUMBER,

  orxSHADER_PARAM_TYPE_NONE = orxENUM_NONE

} orxSHADER_PARAM_TYPE;


typedef struct __orxSHADER_PARAM_t
{
  orxLINKLIST_NODE      stNode;                 
  orxSHADER_PARAM_TYPE  eType;                  
  const orxSTRING       zName;                  
  orxU32                u32ArraySize;           
} orxSHADER_PARAM;


typedef struct __orxSHADER_t                    orxSHADER;


typedef enum __orxSHADER_EVENT_t
{
  orxSHADER_EVENT_SET_PARAM = 0,                
  orxSHADER_EVENT_NUMBER,

  orxSHADER_EVENT_NONE = orxENUM_NONE

} orxSHADER_EVENT;

typedef struct __orxSHADER_EVENT_PAYLOAD_t
{
  const orxSHADER      *pstShader;              
  const orxSTRING       zShaderName;            
  orxSHADER_PARAM_TYPE  eParamType;             
  const orxSTRING       zParamName;             
  orxS32                s32ParamIndex;          
  union
  {
    orxFLOAT            fValue;                 
    const orxTEXTURE   *pstValue;               
    orxVECTOR           vValue;                 
  };                                            
} orxSHADER_EVENT_PAYLOAD;


extern orxDLLAPI void orxFASTCALL               orxShader_Setup();

extern orxDLLAPI orxSTATUS orxFASTCALL          orxShader_Init();

extern orxDLLAPI void orxFASTCALL               orxShader_Exit();

extern orxDLLAPI orxSHADER *orxFASTCALL         orxShader_Create();

extern orxDLLAPI orxSHADER *orxFASTCALL         orxShader_CreateFromConfig(const orxSTRING _zConfigID);

extern orxDLLAPI orxSTATUS orxFASTCALL          orxShader_Delete(orxSHADER *_pstShader);

extern orxDLLAPI orxSTATUS orxFASTCALL          orxShader_Start(const orxSHADER *_pstShader, const orxSTRUCTURE *_pstOwner);

extern orxDLLAPI orxSTATUS orxFASTCALL          orxShader_Stop(const orxSHADER *_pstShader);


extern orxDLLAPI orxSTATUS orxFASTCALL          orxShader_AddFloatParam(orxSHADER *_pstShader, const orxSTRING _zName, orxU32 _u32ArraySize, const orxFLOAT *_afValueList);

extern orxDLLAPI orxSTATUS orxFASTCALL          orxShader_AddTextureParam(orxSHADER *_pstShader, const orxSTRING _zName, orxU32 _u32ArraySize, const orxTEXTURE **_apstValueList);

extern orxDLLAPI orxSTATUS orxFASTCALL          orxShader_AddVectorParam(orxSHADER *_pstShader, const orxSTRING _zName, orxU32 _u32ArraySize, const orxVECTOR *_avValueList);

extern orxDLLAPI orxSTATUS orxFASTCALL          orxShader_CompileCode(orxSHADER *_pstShader, const orxSTRING _zCode);

extern orxDLLAPI const orxLINKLIST *orxFASTCALL orxShader_GetParamList(const orxSHADER *_pstShader);

extern orxDLLAPI void orxFASTCALL               orxShader_Enable(orxSHADER *_pstShader, orxBOOL _bEnable);

extern orxDLLAPI orxBOOL orxFASTCALL            orxShader_IsEnabled(const orxSHADER *_pstShader);

extern orxDLLAPI const orxSTRING orxFASTCALL    orxShader_GetName(const orxSHADER *_pstShader);

#endif /* _orxSHADER_H_ */