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/*
* Copyright (C) 1999-2001 Brian Paul All Rights Reserved.
* (C) Copyright IBM Corporation 2003
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
* AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <X11/Xlib.h>
#include <GL/gl.h>
#include <GL/glx.h>
/** \file opencloseopen.c
* Simple test for Mesa bug #508473. Create a window and rendering context.
* Draw a single frame. Close the window, destroy the context, and close
* the display. Re-open the display, create a new window and context. This
* should work, but, at least as of Mesa 5.1, it segfaults. See the bug
* report for more details.
*
* Most of the code here was lifed from various other Mesa xdemos.
*/
static void
draw(void)
{
glViewport(0, 0, 300, 300);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glOrtho(-1.0, 1.0, -1.0, 1.0, -1.0, 1.0);
glMatrixMode(GL_MODELVIEW);
glShadeModel(GL_FLAT);
glClearColor(0.5, 0.5, 0.5, 1.0);
glClear(GL_COLOR_BUFFER_BIT);
/* draw blue quad */
glLoadIdentity();
glColor3f(0.3, 0.3, 1.0);
glPushMatrix();
glRotatef(0, 0, 0, 1);
glBegin(GL_POLYGON);
glVertex2f(-0.5, -0.25);
glVertex2f( 0.5, -0.25);
glVertex2f( 0.5, 0.25);
glVertex2f(-0.5, 0.25);
glEnd();
glPopMatrix();}
/*
* Create an RGB, double-buffered window.
* Return the window and context handles.
*/
static void
make_window( const char * dpyName, const char *name,
int x, int y, int width, int height,
Display **dpyRet, Window *winRet, GLXContext *ctxRet)
{
int attrib[] = { GLX_RGBA,
GLX_RED_SIZE, 1,
GLX_GREEN_SIZE, 1,
GLX_BLUE_SIZE, 1,
GLX_DOUBLEBUFFER,
None };
int scrnum;
XSetWindowAttributes attr;
unsigned long mask;
Window root;
Window win;
GLXContext ctx;
XVisualInfo *visinfo;
Display *dpy;
dpy = XOpenDisplay(dpyName);
if (!dpy) {
printf("Error: couldn't open display %s\n", dpyName);
exit(1);
}
*dpyRet = dpy;
scrnum = DefaultScreen( dpy );
root = RootWindow( dpy, scrnum );
visinfo = glXChooseVisual( dpy, scrnum, attrib );
if (!visinfo) {
printf("Error: couldn't get an RGB, Double-buffered visual\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 | KeyPressMask;
mask = CWBackPixel | CWBorderPixel | CWColormap | CWEventMask;
win = XCreateWindow( dpy, root, 0, 0, width, height,
0, visinfo->depth, InputOutput,
visinfo->visual, mask, &attr );
/* set hints and properties */
{
XSizeHints sizehints;
sizehints.x = x;
sizehints.y = y;
sizehints.width = width;
sizehints.height = height;
sizehints.flags = USSize | USPosition;
XSetNormalHints(dpy, win, &sizehints);
XSetStandardProperties(dpy, win, name, name,
None, (char **)NULL, 0, &sizehints);
}
ctx = glXCreateContext( dpy, visinfo, NULL, True );
if (!ctx) {
printf("Error: glXCreateContext failed\n");
exit(1);
}
XFree(visinfo);
*winRet = win;
*ctxRet = ctx;
}
static void
destroy_window( Display *dpy, Window win, GLXContext ctx )
{
glXMakeCurrent(dpy, None, NULL);
glXDestroyContext(dpy, ctx);
XDestroyWindow(dpy, win);
XCloseDisplay(dpy);
}
int
main(int argc, char *argv[])
{
Display *dpy;
Window win;
GLXContext ctx;
char *dpyName = ":0";
int i;
for (i = 1; i < argc; i++) {
if (strcmp(argv[i], "-display") == 0) {
dpyName = argv[i+1];
i++;
}
}
printf("If this program segfaults, then Mesa bug #508473 is probably "
"back.\n");
make_window(dpyName, "Open-close-open", 0, 0, 300, 300, &dpy, &win, &ctx);
XMapWindow(dpy, win);
glXMakeCurrent(dpy, win, ctx);
draw();
glXSwapBuffers(dpy, win);
sleep(2);
destroy_window(dpy, win, ctx);
make_window(dpyName, "Open-close-open", 0, 0, 300, 300, &dpy, &win, &ctx);
XMapWindow(dpy, win);
glXMakeCurrent(dpy, win, ctx);
destroy_window(dpy, win, ctx);
return 0;
}
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