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/* $Id: miniglxtest.c,v 1.1.4.7 2003/02/21 22:18:24 keithw Exp $ */
/*
* Test the mini GLX interface.
*/
#include <stdio.h>
#include <stdlib.h>
#include <GL/gl.h>
#define USE_MINI_GLX 1
#if USE_MINI_GLX
#include <GL/miniglx.h>
#else
#include <GL/glx.h>
#endif
#define FRONTBUFFER 1
#define NR 6
#define DO_SLEEPS 1
#define NR_DISPLAYS 2
GLXContext ctx;
static void _subset_Rectf( GLfloat x1, GLfloat y1, GLfloat x2, GLfloat y2 )
{
glBegin( GL_QUADS );
glVertex2f( x1, y1 );
glVertex2f( x2, y1 );
glVertex2f( x2, y2 );
glVertex2f( x1, y2 );
glEnd();
}
static void redraw( Display *dpy, Window w, int rot )
{
printf("Redraw event\n");
#if FRONTBUFFER
glDrawBuffer( GL_FRONT );
#else
/* glDrawBuffer( GL_BACK ); */
#endif
glClearColor( rand()/(float)RAND_MAX,
rand()/(float)RAND_MAX,
rand()/(float)RAND_MAX,
1);
glClear( GL_COLOR_BUFFER_BIT );
#if 1
glColor3f( rand()/(float)RAND_MAX,
rand()/(float)RAND_MAX,
rand()/(float)RAND_MAX );
glPushMatrix();
glRotatef(rot, 0, 0, 1);
glScalef(.5, .5, .5);
_subset_Rectf( -1, -1, 1, 1 );
glPopMatrix();
#endif
#if FRONTBUFFER
glFlush();
#else
glXSwapBuffers( dpy, w );
#endif
glFinish();
}
static Window make_rgb_db_window( Display *dpy,
unsigned int width, unsigned int height )
{
int attrib[] = { GLX_RGBA,
GLX_RED_SIZE, 1,
GLX_GREEN_SIZE, 1,
GLX_BLUE_SIZE, 1,
#if !FRONT_BUFFER
GLX_DOUBLEBUFFER,
#endif
None };
int scrnum;
XSetWindowAttributes attr;
unsigned long mask;
Window root;
Window win;
XVisualInfo *visinfo;
scrnum = 0;
root = RootWindow( dpy, scrnum );
visinfo = glXChooseVisual( dpy, scrnum, attrib );
if (!visinfo) {
printf("Error: couldn't get an RGB, Double-buffered visual\n");
exit(1);
}
ctx = glXCreateContext( dpy, visinfo, NULL, True );
if (!ctx) {
printf("Error: glXCreateContext failed\n");
exit(1);
}
/* window attributes */
attr.background_pixel = 0;
attr.border_pixel = 0;
attr.colormap = XCreateColormap( dpy, root, visinfo->visual, AllocNone);
attr.event_mask = StructureNotifyMask | ExposureMask;
mask = CWBackPixel | CWBorderPixel | CWColormap | CWEventMask;
win = XCreateWindow( dpy, root, 0, 0, width, height,
0, visinfo->depth, InputOutput,
visinfo->visual, mask, &attr );
if (!win) {
printf("Error: XCreateWindow failed\n");
exit(1);
}
glXMakeCurrent( dpy, win, ctx );
return win;
}
static void event_loop( Display *dpy, Window win )
{
int i;
printf("Hang on... drawing %d frames\n", NR);
for (i = 0; i < NR; i++) {
redraw( dpy, win, i*10 );
if (DO_SLEEPS) {
printf("sleep(1)\n");
sleep(1);
}
}
}
int foo( )
{
Display *dpy;
Window win;
dpy = XOpenDisplay(NULL);
if (!dpy) {
printf("Error: XOpenDisplay failed\n");
return 1;
}
win = make_rgb_db_window( dpy, 800, 600);
srand(getpid());
glShadeModel( GL_FLAT );
glClearColor( 0.5, 0.5, 0.5, 1.0 );
XMapWindow( dpy, win );
#if !USE_MINI_GLX
{
XEvent e;
while (1) {
XNextEvent( dpy, &e );
if (e.type == MapNotify && e.xmap.window == win) {
break;
}
}
}
#endif
event_loop( dpy, win );
glXDestroyContext( dpy, ctx );
XDestroyWindow( dpy, win );
XCloseDisplay( dpy );
return 0;
}
int main()
{
int i;
for (i = 0 ; i < NR_DISPLAYS ; i++) {
if (foo() != 0)
break;
}
return 0;
}
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