progs/xdemos/opencloseopen.c

   1 /*
   2  * Copyright (C) 1999-2001  Brian Paul   All Rights Reserved.
   3  * (C) Copyright IBM Corporation 2003
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining a
   6  * copy of this software and associated documentation files (the "Software"),
   7  * to deal in the Software without restriction, including without limitation
   8  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   9  * and/or sell copies of the Software, and to permit persons to whom the
  10  * Software is furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice and this permission notice shall be included
  13  * in all copies or substantial portions of the Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  16  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  19  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  20  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  21  */
  22
  23 #include <stdlib.h>
  24 #include <stdio.h>
  25 #include <unistd.h>
  26 #include <string.h>
  27 #include <X11/Xlib.h>
  28 #include <GL/gl.h>
  29 #include <GL/glx.h>
  30
  31 /** \file opencloseopen.c
  32  * Simple test for Mesa bug #508473.  Create a window and rendering context.
  33  * Draw a single frame.  Close the window, destroy the context, and close
  34  * the display.  Re-open the display, create a new window and context.  This
  35  * should work, but, at least as of Mesa 5.1, it segfaults.  See the bug
  36  * report for more details.
  37  *
  38  * Most of the code here was lifed from various other Mesa xdemos.
  39  */
  40
  41 static void
  42 draw(void)
  43 {
  44    glViewport(0, 0, 300, 300);
  45    glMatrixMode(GL_PROJECTION);
  46    glLoadIdentity();
  47    glOrtho(-1.0, 1.0, -1.0, 1.0, -1.0, 1.0);
  48    glMatrixMode(GL_MODELVIEW);
  49
  50    glShadeModel(GL_FLAT);
  51    glClearColor(0.5, 0.5, 0.5, 1.0);
  52    glClear(GL_COLOR_BUFFER_BIT);
  53
  54    /* draw blue quad */
  55    glLoadIdentity();
  56    glColor3f(0.3, 0.3, 1.0);
  57    glPushMatrix();
  58    glRotatef(0, 0, 0, 1);
  59    glBegin(GL_POLYGON);
  60    glVertex2f(-0.5, -0.25);
  61    glVertex2f( 0.5, -0.25);
  62    glVertex2f( 0.5, 0.25);
  63    glVertex2f(-0.5, 0.25);
  64    glEnd();
  65    glPopMatrix();}
  66
  67
  68 /*
  69  * Create an RGB, double-buffered window.
  70  * Return the window and context handles.
  71  */
  72 static void
  73 make_window( const char * dpyName, const char *name,
  74              int x, int y, int width, int height,
  75              Display **dpyRet, Window *winRet, GLXContext *ctxRet)
  76 {
  77    int attrib[] = { GLX_RGBA,
  78                     GLX_RED_SIZE, 1,
  79                     GLX_GREEN_SIZE, 1,
  80                     GLX_BLUE_SIZE, 1,
  81                     GLX_DOUBLEBUFFER,
  82                     None };
  83    int scrnum;
  84    XSetWindowAttributes attr;
  85    unsigned long mask;
  86    Window root;
  87    Window win;
  88    GLXContext ctx;
  89    XVisualInfo *visinfo;
  90    Display *dpy;
  91
  92    dpy = XOpenDisplay(dpyName);
  93    if (!dpy) {
  94       printf("Error: couldn't open display %s\n", XDisplayName(dpyName));
  95       exit(1);
  96    }
  97
  98    *dpyRet = dpy;
  99    scrnum = DefaultScreen( dpy );
 100    root = RootWindow( dpy, scrnum );
 101
 102    visinfo = glXChooseVisual( dpy, scrnum, attrib );
 103    if (!visinfo) {
 104       printf("Error: couldn't get an RGB, Double-buffered visual\n");
 105       exit(1);
 106    }
 107
 108    /* window attributes */
 109    attr.background_pixel = 0;
 110    attr.border_pixel = 0;
 111    attr.colormap = XCreateColormap( dpy, root, visinfo->visual, AllocNone);
 112    attr.event_mask = StructureNotifyMask | ExposureMask | KeyPressMask;
 113    mask = CWBackPixel | CWBorderPixel | CWColormap | CWEventMask;
 114
 115    win = XCreateWindow( dpy, root, 0, 0, width, height,
 116                         0, visinfo->depth, InputOutput,
 117                         visinfo->visual, mask, &attr );
 118
 119    /* set hints and properties */
 120    {
 121       XSizeHints sizehints;
 122       sizehints.x = x;
 123       sizehints.y = y;
 124       sizehints.width  = width;
 125       sizehints.height = height;
 126       sizehints.flags = USSize | USPosition;
 127       XSetNormalHints(dpy, win, &sizehints);
 128       XSetStandardProperties(dpy, win, name, name,
 129                               None, (char **)NULL, 0, &sizehints);
 130    }
 131
 132    ctx = glXCreateContext( dpy, visinfo, NULL, True );
 133    if (!ctx) {
 134       printf("Error: glXCreateContext failed\n");
 135       exit(1);
 136    }
 137
 138    XFree(visinfo);
 139
 140    *winRet = win;
 141    *ctxRet = ctx;
 142 }
 143
 144
 145 static void
 146 destroy_window( Display *dpy, Window win, GLXContext ctx )
 147 {
 148    glXMakeCurrent(dpy, None, NULL);
 149    glXDestroyContext(dpy, ctx);
 150    XDestroyWindow(dpy, win);
 151    XCloseDisplay(dpy);
 152 }
 153
 154
 155 int
 156 main(int argc, char *argv[])
 157 {
 158    Display *dpy;
 159    Window win;
 160    GLXContext ctx;
 161    char *dpyName = NULL;
 162    int i;
 163
 164    for (i = 1; i < argc; i++) {
 165       if (strcmp(argv[i], "-display") == 0) {
 166          dpyName = argv[i+1];
 167          i++;
 168       }
 169    }
 170
 171    printf("If this program segfaults, then Mesa bug #508473 is probably "
 172           "back.\n");
 173    make_window(dpyName, "Open-close-open", 0, 0, 300, 300, &dpy, &win, &ctx);
 174    XMapWindow(dpy, win);
 175    glXMakeCurrent(dpy, win, ctx);
 176
 177    draw();
 178    glXSwapBuffers(dpy, win);
 179    sleep(2);
 180
 181    destroy_window(dpy, win, ctx);
 182
 183    make_window(dpyName, "Open-close-open", 0, 0, 300, 300, &dpy, &win, &ctx);
 184    XMapWindow(dpy, win);
 185    glXMakeCurrent(dpy, win, ctx);
 186    destroy_window(dpy, win, ctx);
 187
 188    return 0;
 189 }