#ifndef __global_h_
#define __global_h_

#include <assert.h>

#include "glm.h"
#include "camera.h"
#include "mesh.h"
#include "color.h"
#include "change.h"
#include "buffers.h"

//	For progress update.
#include	"GeoMesh.h"

#ifndef TRUE
#define TRUE	1
#endif /* TRUE */

#ifndef FALSE
#define FALSE	0
#endif /* FALSE */

#ifndef false
#define false	((char) 0)
#endif
#ifndef true
#define true	((char) 1)
#endif

#ifndef MAX
#define MAX(a,b) ( (a) > (b) ? (a) : (b) )
#endif
#ifndef MIN
#define MIN(a,b) ( (a) < (b) ? (a) : (b) )
#endif
#ifndef ABS
#define ABS(a)   ( (a) >= 0 ? (a) : (-(a)) )
#endif

#define MAX_CHAR 256

//#define DEBUG

// Geometry acceleration technique
//#define IMMEDIATE_MODE
//#define VERTEX_ARRAY_INTERLEAVE
//#define VERTEX_ARRAY
#define VERTEX_BUFFER_OBJECTS

// Viewpoint metric
//#define KL
#define MI
//#define HE
//#define CS

// Histogram technique
//#define USE_OCCLUSION_QUERY
#define HYBRID_HW_SW_HISTOGRAM

//#define SALIENCY

#define CHECK_LOCAL_INVERSION

// Extension added into the filename
#ifdef KL // Kullback-Leibler
#define EXT "VKL"
#endif
#ifdef MI // Mutual Information
#define EXT "VMI"
#endif
#ifdef HE // Hellinger
#define EXT "VHE"
#endif
#ifdef CS // Chi-Square
#define EXT "VCS"
#endif

#define CHECK_OPENGL_ERROR( cmd ) \
{ GLenum error; \
    while ( ( error = glGetError() ) != GL_NO_ERROR ) { \
    printf( "[%s:%d] ’%s’failed with error %s\n", \
    __FILE__, __LINE__, \
    cmd, gluErrorString(error) ); \
    } \
}

#define CHECK_FRAMEBUFFER_STATUS()                            \
{                                                             \
    GLenum status;                                            \
    status = glCheckFramebufferStatusEXT(GL_FRAMEBUFFER_EXT); \
    switch(status) {                                          \
    case GL_FRAMEBUFFER_COMPLETE_EXT:                         \
        break;                                                \
    case GL_FRAMEBUFFER_UNSUPPORTED_EXT:                      \
        /* choose different formats */                        \
        break;                                                \
    default:                                                  \
        /* programming error; will fail on all hardware */    \
        assert(0);                                            \
    } \
}

namespace	VMI
{

extern GLMmodel* pmodel; // Vertices start at position 1

extern GLubyte *pixels;

extern Camera *cameras;
extern int numCameras;

extern Color *colors;

extern int **histogram;
extern GLuint *queries;

extern Mesh *mesh;

extern GLdouble *initialIs;

extern GLdouble  radius;
extern GLdouble  fov;
extern int    numDemandedTriangles,
                 cameraType;
extern GLboolean bBeQuiet,
                 bEnableOffScreen,
                 bSaveLog,
                 bLoadCamerasFromFile,
								 bRemoveRedundantVertices;

extern GLsizei width, height;

extern GLuint vertex_buf, color_buf;

extern Vertex_ *buf_vertices;
extern Color   *buf_colors;

extern int vmiWin;

extern char filename[MAX_CHAR];

extern void init(void);

extern void resetProjectedAreas(int **histogram, int numCameras);
extern void getProjectedAreas(int **histogram, int numCameras);
extern void getProjectedAreasWin(int **histogram, int numCameras, Change *c);

extern void renderGeometry(void);

extern void drawTexture(void);

extern void display(void);

extern void freeMemory(void);

extern void applyHWAcceleration(void);
extern void updateHWAcceleration(Change *c);
extern void setOrthographicProjection(void);
extern void resetPerspectiveProjection(void);
extern void renderBitmapString(float x, float y, void *font, char *string);

//	For progress update
extern	Geometry::TIPOFUNC	mUPB;

}

#endif