#include <GL/glut.h> 
#include <stdlib.h> 
#include <stdio.h> 
#define TEX_HEIGHT 317
#define TEX_WIDTH 317
static GLubyte image[TEX_HEIGHT][TEX_WIDTH][4]; 

void initTexture(void) 
{
 FILE *fp; int x, z;

 /* texture file open */ 
if((fp=fopen("niko.tga", "rb"))==NULL){ 
fprintf(stderr, "texture file cannot open\n"); 
return;
 } 

fseek(fp, 18, SEEK_SET);
 for(x=0;x<TEX_HEIGHT;x++){
 for(z=0;z<TEX_WIDTH;z++){ 
image[x][z][2]=fgetc(fp);/* B */ 
image[x][z][1]=fgetc(fp);/* G */
 image[x][z][0]=fgetc(fp);/* R */
 image[x][z][3]=fgetc(fp);/* alpha */
 }
 } 
fclose(fp); 
 }
 
void displayTexPolygon(void) {

 glEnable(GL_TEXTURE_2D);
 glBegin(GL_QUADS);

 glTexCoord2f(0.0, 0.0); glVertex3f(-5.0,-5.0, 0.0);
 glTexCoord2f(0.0, 1.0);glVertex3f(-5.0, 5.0, 0.0);
 glTexCoord2f(1.0, 1.0);glVertex3f( 5.0, 5.0, 0.0); 
 glTexCoord2f(1.0, 0.0);glVertex3f( 5.0,-5.0, 0.0); 
glEnd();
 glDisable(GL_TEXTURE_2D);
 }

 void display(void) { 
static float spin=0.0;
 glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
glPushMatrix();
 {
 glTranslatef(0.0, 0.0,-20.0); 
glRotatef(spin, 0.0, 1.0, 0.0);
 glColor3f(1.0, 1.0, 1.0);
 displayTexPolygon(); 
//glutSolidTeapot(10.0);
}

spin+=0.1;
 glPopMatrix();
glFlush();
 glutSwapBuffers();
 }
 void init(void) { 
glClearColor(0.0, 0.0, 0.0, 0.0);
 glDepthFunc(GL_LEQUAL);
 glEnable(GL_DEPTH_TEST);
 initTexture();
 glPixelStorei(GL_UNPACK_ALIGNMENT, 1); 
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST); 
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST); 
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, TEX_WIDTH, TEX_HEIGHT, 0, GL_RGBA, GL_UNSIGNED_BYTE, image); 
}

 void reshape(int w, int h) { 
glViewport(0, 0, (GLsizei) w, (GLsizei) h);
 glMatrixMode(GL_PROJECTION);
 glLoadIdentity(); 
glFrustum(-5.0, 5.0,-5.0, 5.0, 5.0, 500.0); 
glMatrixMode(GL_MODELVIEW);
 glLoadIdentity(); 
}

 int main(int argc, char** argv) {
 glutInit(&argc, argv);
 glutInitDisplayMode (GLUT_DEPTH|GLUT_DOUBLE|GLUT_RGBA); 
glutInitWindowSize (250, 250); 
glutInitWindowPosition (100, 100);
 glutCreateWindow (argv[0]); 
init(); 
glutIdleFunc(display);
 glutDisplayFunc(display);
 glutReshapeFunc(reshape); 
glutMainLoop(); 
return 0;
 }