fprintf(fp, "P6\n# CREATOR: glReadPixel()\n%d %d\n%d\n",
win_width, win_height, UCHAR_MAX);
q = 0;
for (i = 0; i < win_height; i++)
for (j = 0; j < win_width; j++)
fprintf(fp, "P6\n# CREATOR: glReadPixel()\n%d %d\n%d\n",
win_width, win_height, UCHAR_MAX);
q = 0;
for (i = 0; i < win_height; i++)
for (j = 0; j < win_width; j++)