progs/xdemos/vindex.c

   1 /* $Id: vindex.c,v 1.1 1999/08/19 00:55:43 jtg Exp $ */
   2
   3 /*
   4  * Test Linux 8-bit SVGA/Mesa color index mode
   5  *
   6  * Compile with:  gcc vindex.c -I../include -L../lib -lMesaGL -lX11 -lXext
   7  *   -lvga -lm -o vindex
   8  *
   9  * This program is in the public domain.
  10  * Brian Paul, January 1996
  11  */
  12
  13
  14
  15 #include <vga.h>
  16 #include "GL/svgamesa.h"
  17 #include "GL/gl.h"
  18
  19
  20
  21 static GLint width = 640, height = 480;
  22
  23
  24
  25 static void display( void )
  26 {
  27    int i, j;
  28    int w, h;
  29
  30    glViewport( 0, 0, width, height );
  31    glMatrixMode( GL_PROJECTION );
  32    glLoadIdentity();
  33    glOrtho( 0.0, (GLfloat) width, 0.0, (GLfloat) height, -1.0, 1.0 );
  34
  35    glClear( GL_COLOR_BUFFER_BIT );
  36
  37    w = width / 16;
  38    h = height / 16;
  39    for (i=0;i<16;i++) {
  40       for (j=0;j<16;j++) {
  41          glIndexi( i*16+j );
  42          glRecti( i*w, j*h, i*w+w, j*h+h );
  43       }
  44    }
  45 }
  46
  47
  48
  49 int main( int argc, char *argv[] )
  50 {
  51    SVGAMesaContext vmc;
  52    int i;
  53
  54    vga_init();
  55    vga_setmode( G640x480x256 );
  56
  57    vmc = SVGAMesaCreateContext( GL_FALSE );
  58    SVGAMesaMakeCurrent( vmc );
  59
  60    display();
  61    sleep(3);
  62
  63    SVGAMesaDestroyContext( vmc );
  64    vga_setmode( TEXT );
  65    return 0;
  66 }