/**********************************************************************************                        SAMSUNG INDIA SOFTWARE OPERATIONS*                               Copyright(C) 2006*                              ALL RIGHTS RESERVED** This program is proprietary  to Samsung India  Software Operations Pvt. Ltd.,* and is protected under International Copyright Act as an unpublished work.Its* use and disclosure is limited by the terms and conditions of a license agree-* -ment. It may not be  copied or otherwise  reproduced or disclosed to persons* outside the licensee's  organization except in accordance  with the terms and* conditions of  such an agreement. All copies and  reproductions  shall be the* property of  Samsung  India Software Operations Pvt. Ltd.  and must bear this* notice in its entirety.*********************************************************************************//****************************************************************************//*!** \file        ghHelpers.h* \author    Sandeep Kakarlapudi (s.kakarla@samsung.com)*           Sandeep Virdi (san.virdi@samsung.com)* \brief    GL framework**//*---------------------------------------------------------------------------*/#ifndef __GLHELPERS_H__#define __GLHELPERS_H__//GL_HELPERS_INCLUDED is used by the shader .h files!#define GL_HELPERS_INCLUDED 1#include <gles2/gl2.h>enum {GLH_WIDTH = 800,GLH_HEIGHT=480};//---------- Dummy EGL framework ---------- void _DEGLInitializeContext(int maxSBC);bool _DEGLProcessEvents();void _DEGLSwapBuffers(); //Note: on windows this sleeps for 1ms to prevent things from rendering too fastfloat _DEGLGetElapsedTime();//------------------------------------------ #include <stdio.h>#include <stdlib.h>#include <string>#include <vector>#define PI (3.141592)#define PI_OVER_180 (PI/180.0)#define ERR -1#define NOERR 0#define TGA_RGB         2        // This tells us it's a normal RGB (really BGR) file#define TGA_A         3        // This tells us it's a ALPHA file#define TGA_RLE        10        // struct tImageTGA{public:    int channels;            // The channels in the image (3 = RGB : 4 = RGBA)    int sizeX;            // The width of the image in pixels    int sizeY;            // The height of the image in pixels    unsigned char *data;        // The image pixel data};struct ghShader{    const char* textShader;    const unsigned int* binShader;    int binShaderLen;    int binShaderCheckSum;    ghShader(const char* text, const unsigned int* bin,  int binLen, int binCS);    ghShader();};class ghProgram;int ghLoadShaders(ghProgram& prog);void reloadAllShaders();struct AttribBinding{    AttribBinding(const char* aName, int indx)        :attribName(aName), index(indx)    {}    AttribBinding(const std::string& s, int indx)        :attribName(s), index(indx)    {}    std::string attribName;    int         index;};class ghProgram {public:    GLuint fs;      //GL fragment shader id    GLuint vs;      //GL vertex shader id    GLuint prog;    //GL program shader id    ghShader vertShader;    ghShader fragShader;        bool loadShadersFromFile;        const char* fsFile;    const char* vsFile;    ghProgram(ghShader vertShaderObject, ghShader fragShaderObject);//#ifdef WIN32//#ifndef GLES2LIB        //Loading from files is only supported on WIN32    ghProgram(const char* vsFileName, const char* fsFileName);//#endif//#endif    ~ghProgram();    GLint loc(const char* varName);    void bindAttribLoc(int index, const char* attribName);    int load();    int reload();    void reset();private:    std::vector<AttribBinding> attribBindings;    bool progUsed;    ghProgram& operator= (ghProgram&);    };void checkGLerror(const char* location = "");void checkFBStatus(const char* location = "");extern "C"{void matTranspose(float* m);void matIdentity(float m[16]);bool matInverse(float inverse[16], const float src[16]);void matMult(float* m3, const float* m1, const float* m2) ;void matTranslate(float* m, const float x, const float y, const float z  );bool matRotate(float* m, float DEGAngle, float x, float y, float z);void matScale(float*m, float x, float y, float z);bool matFrustum(float* m,float f32Left, float f32Right,float f32Bottom, float f32Top, float f32ZNear, float f32ZFar);bool matPerspective(float* m ,float fieldOfViewDegree, float aspectRatio, float zNear, float zFar);bool matOrtho(float* m,float f32Left, float f32Right,float f32Top, float f32Bottom, float f32ZNear, float f32ZFar);bool vecNormalize(float& x, float& y, float& z);void vecCrossProduct(float& x,float& y, float& z , float x1,float y1, float z1 ,float x2,float y2, float z2);void vecMult(const float* m, float x, float y, float z);void matLookAt(float* m, float px, float py, float pz,float tx, float ty, float tz, float ux, float uy, float uz);void matPrint(float* m);//No need to expose this perhaps since loadShaders calls these internallyunsigned int simpleCheckSum(const unsigned int* bin, int length);void isCheckSumValid(const unsigned int* bin, int len, int checkSum, const char* name);}#endif //__GLHELPERS_H__