196 lines
3.5 KiB
C
196 lines
3.5 KiB
C
/* $Id: miniglxtest.c,v 1.2 2003/08/23 01:28:59 jonsmirl Exp $ */
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/*
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* Test the mini GLX interface.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <GL/gl.h>
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#define USE_MINI_GLX 1
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#if USE_MINI_GLX
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#include <GL/miniglx.h>
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#else
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#include <GL/glx.h>
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#endif
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#define FRONTBUFFER 1
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#define NR 6
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#define DO_SLEEPS 1
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#define NR_DISPLAYS 2
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GLXContext ctx;
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static void _subset_Rectf( GLfloat x1, GLfloat y1, GLfloat x2, GLfloat y2 )
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{
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glBegin( GL_QUADS );
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glVertex2f( x1, y1 );
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glVertex2f( x2, y1 );
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glVertex2f( x2, y2 );
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glVertex2f( x1, y2 );
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glEnd();
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}
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static void redraw( Display *dpy, Window w, int rot )
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{
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printf("Redraw event\n");
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#if FRONTBUFFER
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glDrawBuffer( GL_FRONT );
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#else
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/* glDrawBuffer( GL_BACK ); */
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#endif
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glClearColor( rand()/(float)RAND_MAX,
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rand()/(float)RAND_MAX,
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rand()/(float)RAND_MAX,
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1);
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glClear( GL_COLOR_BUFFER_BIT );
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#if 1
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glColor3f( rand()/(float)RAND_MAX,
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rand()/(float)RAND_MAX,
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rand()/(float)RAND_MAX );
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glPushMatrix();
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glRotatef(rot, 0, 0, 1);
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glScalef(.5, .5, .5);
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_subset_Rectf( -1, -1, 1, 1 );
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glPopMatrix();
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#endif
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#if FRONTBUFFER
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glFlush();
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#else
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glXSwapBuffers( dpy, w );
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#endif
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glFinish();
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}
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static Window make_rgb_db_window( Display *dpy,
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unsigned int width, unsigned int height )
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{
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int attrib[] = { GLX_RGBA,
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GLX_RED_SIZE, 1,
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GLX_GREEN_SIZE, 1,
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GLX_BLUE_SIZE, 1,
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#if !FRONT_BUFFER
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GLX_DOUBLEBUFFER,
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#endif
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None };
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int scrnum;
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XSetWindowAttributes attr;
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unsigned long mask;
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Window root;
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Window win;
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XVisualInfo *visinfo;
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scrnum = 0;
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root = RootWindow( dpy, scrnum );
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if (!(visinfo = glXChooseVisual( dpy, scrnum, attrib ))) {
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printf("Error: couldn't get an RGB, Double-buffered visual\n");
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exit(1);
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}
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if(!(ctx = glXCreateContext( dpy, visinfo, NULL, True ))) {
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printf("Error: glXCreateContext failed\n");
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exit(1);
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}
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/* window attributes */
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attr.background_pixel = 0;
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attr.border_pixel = 0;
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attr.colormap = XCreateColormap( dpy, root, visinfo->visual, AllocNone);
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attr.event_mask = StructureNotifyMask | ExposureMask;
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mask = CWBackPixel | CWBorderPixel | CWColormap | CWEventMask;
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win = XCreateWindow( dpy, root, 0, 0, width, height,
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0, visinfo->depth, InputOutput,
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visinfo->visual, mask, &attr );
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if (!win) {
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printf("Error: XCreateWindow failed\n");
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exit(1);
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}
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glXMakeCurrent( dpy, win, ctx );
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glViewport(0, 0, width, height);
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return win;
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}
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static void event_loop( Display *dpy, Window win )
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{
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int i;
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printf("Hang on... drawing %d frames\n", NR);
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for (i = 0; i < NR; i++) {
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redraw( dpy, win, i*10 );
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if (DO_SLEEPS) {
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printf("sleep(1)\n");
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sleep(1);
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}
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}
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}
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int foo( )
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{
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Display *dpy;
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Window win;
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dpy = XOpenDisplay(NULL);
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if (!dpy) {
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printf("Error: XOpenDisplay failed\n");
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return 1;
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}
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win = make_rgb_db_window( dpy, 800, 600);
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srand(getpid());
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glShadeModel( GL_FLAT );
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glClearColor( 0.5, 0.5, 0.5, 1.0 );
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XMapWindow( dpy, win );
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{
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XEvent e;
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while (1) {
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XNextEvent( dpy, &e );
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if (e.type == MapNotify && e.xmap.window == win) {
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break;
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}
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}
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}
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event_loop( dpy, win );
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glXDestroyContext( dpy, ctx );
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XDestroyWindow( dpy, win );
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XCloseDisplay( dpy );
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return 0;
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}
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int main()
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{
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int i;
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for (i = 0 ; i < NR_DISPLAYS ; i++) {
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if (foo() != 0)
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break;
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}
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return 0;
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}
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