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#ifndef _GLTOOLS_H_
#define _GLTOOLS_H_
/* this is the targa header, pragmas are needed to do the voodoo magic */
/* http://gcc.gnu.org/onlinedocs/gcc-4.4.0/gcc/ */
#pragma pack(1)
typedef struct
{
GLbyte identsize; /* Size of id field that follows header (0) */
GLbyte imageType; /* 0 = none, 1 = indexed, 2 = rgb, 3 = grey, +8 = rle */
GLbyte colorMapType; /* 0 = none, 1 = paletted */
unsigned short colorMapStart; /* first colour map entry */
unsigned short colorMapLength; /* number of colors */
unsigned char colorMapBits; /* bits per palette entry */
unsigned short xstart; /* image x origin */
unsigned short ystart; /* image y origin */
unsigned short width; /* width in pixels */
unsigned short height; /* height in pixels */
GLbyte bits; /* bits per pixel (8 16, 24, 32) */
GLbyte descriptor; /* image descriptor */
} TGAHEADER;
#pragma pack()
/* function prototypes */
GLuint gltLoadTGATexture(const char *);
void gltListExtensions(void);
void gltOpenGLInfo(void);
GLboolean gltQueryExtension(const char *);
GLint gltWriteTGA(const char *);
GLbyte *gltLoadTGA(const char *, GLint *, GLint *, GLint *, GLenum *);
#ifdef _WIN32
char *strsep(char**, const char*);
#endif
static inline void gltErrorCheck(void)
{
GLenum err_code;
const GLubyte *err_str;
while ((err_code = glGetError()) != GL_NO_ERROR)
{
err_str = gluErrorString(err_code);
fprintf(stderr, "OpenGL error: %s\n", err_str);
}
}
#endif
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