#ifndef MAIN_H
#define MAIN_H

typedef struct {
  float x, y, z;
} vec3;

#ifndef M_PI
#define M_PI 3.14159265358979323846
#endif

/* Function declarations */
void rotateMatrix(double angle, double x, double y, double z, float *R);
void perspectiveMatrix(double fovy, double aspect, double znear, double zfar, float *P);
void multiplyMatrix(float *A, float *B, float *C);

char *loadShader(char *sFilename);
void processShader(GLuint *shader, char *file, GLint type);

Window CreateXWindow(const char *title, int width, int height,
    Display* display, EGLDisplay sEGLDisplay, EGLConfig FBConfig,
    Colormap *pColormap, XVisualInfo **ppVisual);

/* Defines */
#define DEBUG0(x)
#define DEBUG1(x,a)

#define VERT_FILE "shader.vert"
#define FRAG_FILE "shader.frag"

#define VERT_FILE1 "default_textured.vert"
#define FRAG_FILE1 "default_textured.frag"

#define GL_CHECK(x) \
    x; \
    { \
        GLenum glError = glGetError(); \
        if(glError != GL_NO_ERROR) { \
            fprintf(stderr, "glGetError() = %i (0x%.8x) at line %i\n", glError, glError, __LINE__); \
            exit(1); \
        } \
    }

#define EGL_CHECK(x) \
    x; \
    { \
        EGLint eglError = eglGetError(); \
        if(eglError != EGL_SUCCESS) { \
            fprintf(stderr, "eglGetError() = %i (0x%.8x) at line %i\n", eglError, eglError, __LINE__); \
            exit(1); \
        } \
    }

#endif /* MAIN_H */