--- /dev/null
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <assert.h>
+#include <unistd.h>
+#include <sys/time.h>
+#include <X11/Xlib.h>
+#include <GL/glx.h>
+#include "app.h"
+#include "vroot.h"
+
+#define DEF_WIN_WIDTH 1280
+#define DEF_WIN_HEIGHT 800
+
+static Window create_xwindow(void);
+static int init_gl(void);
+static void destroy_gl(void);
+static int proc_xevent(XEvent *ev);
+
+static Display *dpy;
+static int scr;
+static Window win, root;
+static GLXContext ctx;
+static XVisualInfo *visinf;
+static Atom xa_wm_proto, xa_wm_delwin;
+
+static volatile int quit;
+static int mapped;
+
+static struct timeval tv, tv0;
+
+int main(int argc, char **argv)
+{
+ int i;
+ unsigned int wid;
+ char *endp;
+
+ if((endp = getenv("XSCREENSAVER_WINDOW"))) {
+ printf("XSCREENSAVER_WINDOW: %s\n", endp);
+ }
+
+ if(!(dpy = XOpenDisplay(0))) {
+ fprintf(stderr, "failed to open connection to the X server\n");
+ return 1;
+ }
+ scr = DefaultScreen(dpy);
+ root = RootWindow(dpy, scr);
+
+ xa_wm_proto = XInternAtom(dpy, "WM_PROTOCOLS", False);
+ xa_wm_delwin = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
+
+ for(i=0; i<argc; i++) {
+ printf("argv[%d]: %s\n", i, argv[i]);
+ }
+
+ for(i=1; i<argc; i++) {
+ if(strcmp(argv[i], "-root") == 0) {
+ argv[i] = argv[--argc];
+ if(!(win = VirtualRootWindowOfScreen(ScreenOfDisplay(dpy, scr)))) {
+ fprintf(stderr, "failed to find root window!\n");
+ XCloseDisplay(dpy);
+ return 1;
+ }
+ i--;
+
+ } else if(strcmp(argv[i], "-window-id") == 0) {
+ if((wid = strtol(argv[i+1], &endp, 0)) > 0 && endp != argv[i+1]) {
+ printf("using window: %x\n", wid);
+ win = (Window)wid;
+ memmove(argv + i, argv + i + 2, (argc - i - 2) * sizeof *argv);
+ argc -= 2;
+ i--;
+ } else {
+ fprintf(stderr, "invalid option: -window-id must be followed by a valid window id\n");
+ XCloseDisplay(dpy);
+ return 1;
+ }
+ }
+ }
+
+ if(app_parse_args(argc, argv) == -1) {
+ XCloseDisplay(dpy);
+ return 1;
+ }
+
+ if(!win && !(win = create_xwindow())) {
+ XCloseDisplay(dpy);
+ return 1;
+ }
+ if(init_gl() == -1) {
+ return 1;
+ }
+ if(app_init() == -1) {
+ destroy_gl();
+ XCloseDisplay(dpy);
+ return 1;
+ }
+
+ gettimeofday(&tv0, 0);
+
+ while(!quit) {
+ while(XPending(dpy)) {
+ XEvent ev;
+ XNextEvent(dpy, &ev);
+ if(proc_xevent(&ev) == -1 || quit) {
+ goto done;
+ }
+ }
+
+ gettimeofday(&tv, 0);
+ msec = (tv.tv_sec - tv0.tv_sec) * 1000 + (tv.tv_usec - tv0.tv_usec) / 1000;
+
+ app_display();
+
+ glXSwapBuffers(dpy, win);
+ assert(glGetError() == GL_NO_ERROR);
+ }
+
+done:
+ destroy_gl();
+ XCloseDisplay(dpy);
+ return 0;
+}
+
+void app_quit(void)
+{
+ exit(0);
+}
+
+void app_fullscreen(void)
+{
+}
+
+void app_windowed(void)
+{
+}
+
+static XVisualInfo *choose_visual(void)
+{
+ int glxattr[] = {
+ GLX_RGBA, GLX_DOUBLEBUFFER,
+ GLX_RED_SIZE, 1,
+ GLX_GREEN_SIZE, 1,
+ GLX_BLUE_SIZE, 1,
+ GLX_DEPTH_SIZE, 1,
+ GLX_SAMPLE_BUFFERS, 1,
+ GLX_SAMPLES, 8,
+ None
+ };
+ int *sample_buffers = glxattr + 10;
+ int *num_samples = glxattr + 13;
+ XVisualInfo *res;
+
+ do {
+ res = glXChooseVisual(dpy, scr, glxattr);
+ *num_samples >>= 1;
+ if(*num_samples <= 1) {
+ *sample_buffers = None;
+ }
+ } while(!res && *num_samples > 0);
+
+ return res;
+}
+
+static XVisualInfo *match_visual(Window win)
+{
+ int numvi, i;
+ XVisualInfo vitmp, *vi;
+ XWindowAttributes wattr;
+ unsigned int mask = VisualScreenMask | VisualDepthMask | VisualClassMask;
+
+ XGetWindowAttributes(dpy, win, &wattr);
+
+ vitmp.visualid = XVisualIDFromVisual(wattr.visual);
+ vi = XGetVisualInfo(dpy, VisualIDMask, &vitmp, &numvi);
+ vitmp = *vi;
+ vi = XGetVisualInfo(dpy, mask, &vitmp, &numvi);
+
+ printf("found %d matching visuals\n", numvi);
+ for(i=0; i<numvi; i++) {
+ int nsamp;
+
+ glXGetConfig(dpy, vi + i, GLX_SAMPLES, &nsamp);
+
+ printf("%x (msaa: %d)\n", (unsigned int)vi[i].visualid, nsamp);
+ }
+ return 0;
+}
+
+static Window create_xwindow(void)
+{
+ XSetWindowAttributes xattr;
+ long xattr_mask, evmask;
+
+ if(!(visinf = choose_visual())) {
+ fprintf(stderr, "failed to find appropriate visual\n");
+ return 0;
+ }
+
+ xattr.colormap = XCreateColormap(dpy, root, visinf->visual, AllocNone);
+ xattr.background_pixel = BlackPixel(dpy, scr);
+ xattr_mask = CWColormap | CWBackPixel;
+
+ if(!(win = XCreateWindow(dpy, root, 0, 0, DEF_WIN_WIDTH, DEF_WIN_HEIGHT, 0,
+ visinf->depth, InputOutput, visinf->visual, xattr_mask, &xattr))) {
+ fprintf(stderr, "failed to create X window\n");
+ XFree(visinf);
+ visinf = 0;
+ return 0;
+ }
+
+ evmask = ExposureMask | StructureNotifyMask | KeyPressMask;
+ XSelectInput(dpy, win, evmask);
+
+ Xutf8SetWMProperties(dpy, win, "census", "census", 0, 0, 0, 0, 0);
+ XSetWMProtocols(dpy, win, &xa_wm_delwin, 1);
+
+ XMapRaised(dpy, win);
+ return win;
+}
+
+static int init_gl(void)
+{
+ XWindowAttributes wattr;
+ int rbits, gbits, bbits, zbits, sbits, nsamp;
+
+ if(!win) return -1;
+
+ XGetWindowAttributes(dpy, win, &wattr);
+
+ if(!visinf && !(visinf = choose_visual())) {
+ fprintf(stderr, "failed to find appropriate visual\n");
+ return -1;
+ }
+
+ if(!(ctx = glXCreateContext(dpy, visinf, 0, 1))) {
+ fprintf(stderr, "failed to create OpenGL context\n");
+ XFree(visinf);
+ if(win != root) {
+ XDestroyWindow(dpy, win);
+ }
+ return -1;
+ }
+
+ glXGetConfig(dpy, visinf, GLX_RED_SIZE, &rbits);
+ glXGetConfig(dpy, visinf, GLX_GREEN_SIZE, &gbits);
+ glXGetConfig(dpy, visinf, GLX_BLUE_SIZE, &bbits);
+ glXGetConfig(dpy, visinf, GLX_DEPTH_SIZE, &zbits);
+ glXGetConfig(dpy, visinf, GLX_STENCIL_SIZE, &sbits);
+ glXGetConfig(dpy, visinf, GLX_SAMPLES, &nsamp);
+
+ printf("created GLX visual %d bpp (%d%d%d), %dz, %ds, %d samp/pix\n",
+ visinf->depth, rbits, gbits, bbits, zbits, sbits, nsamp);
+
+ printf("glXMakeCurrent(%p, %x, %p)\n", (void*)dpy, (unsigned int)win, (void*)ctx);
+ glXMakeCurrent(dpy, win, ctx);
+ app_reshape(wattr.width, wattr.height);
+ win_width = wattr.width;
+ win_height = wattr.height;
+ return 0;
+}
+
+static void destroy_gl(void)
+{
+ if(visinf) {
+ XFree(visinf);
+ }
+ if(ctx) {
+ glXMakeCurrent(dpy, 0, 0);
+ glXDestroyContext(dpy, ctx);
+ }
+ if(win && win != root) {
+ XDestroyWindow(dpy, win);
+ }
+}
+
+static int proc_xevent(XEvent *ev)
+{
+ KeySym sym;
+
+ switch(ev->type) {
+ case MapNotify:
+ mapped = 1;
+ break;
+
+ case UnmapNotify:
+ mapped = 0;
+ break;
+
+ case ConfigureNotify:
+ if(ev->xconfigure.width != win_width || ev->xconfigure.height != win_height) {
+ int w = ev->xconfigure.width;
+ int h = ev->xconfigure.height;
+ app_reshape(w, h);
+ win_width = w;
+ win_height = h;
+ }
+ break;
+
+ case KeyPress:
+ case KeyRelease:
+ if((sym = XLookupKeysym(&ev->xkey, 0))) {
+ if(sym == XK_Escape) {
+ sym = 27;
+ }
+ app_keyboard(sym, ev->type == KeyPress);
+ }
+ break;
+
+ case ClientMessage:
+ if(ev->xclient.message_type == xa_wm_proto) {
+ if(ev->xclient.data.l[0] == xa_wm_delwin) {
+ app_quit();
+ }
+ }
+ break;
+
+ default:
+ break;
+ }
+
+ return 0;
+}
--- /dev/null
+/* -*- Mode: C; tab-width: 2 -*- */
+/*****************************************************************************/
+/** Copyright 1991 by Andreas Stolcke **/
+/** Copyright 1990 by Solbourne Computer Inc. **/
+/** Longmont, Colorado **/
+/** **/
+/** All Rights Reserved **/
+/** **/
+/** Permission to use, copy, modify, and distribute this software and **/
+/** its documentation for any purpose and without fee is hereby **/
+/** granted, provided that the above copyright notice appear in all **/
+/** copies and that both that copyright notice and this permis- **/
+/** sion notice appear in supporting documentation, and that the **/
+/** name of Solbourne not be used in advertising **/
+/** in publicity pertaining to distribution of the software without **/
+/** specific, written prior permission. **/
+/** **/
+/** ANDREAS STOLCKE AND SOLBOURNE COMPUTER INC. DISCLAIMS ALL WARRANTIES **/
+/** WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF **/
+/** MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL ANDREAS STOLCKE **/
+/** OR SOLBOURNE BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL **/
+/** DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA **/
+/** OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER **/
+/** TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE **/
+/** OR PERFORMANCE OF THIS SOFTWARE. **/
+/*****************************************************************************/
+/*
+ * vroot.h -- Virtual Root Window handling header file
+ *
+ * This header file redefines the X11 macros RootWindow and DefaultRootWindow,
+ * making them look for a virtual root window as provided by certain `virtual'
+ * window managers like swm and tvtwm. If none is found, the ordinary root
+ * window is returned, thus retaining backward compatibility with standard
+ * window managers.
+ * The function implementing the virtual root lookup remembers the result of
+ * its last invocation to avoid overhead in the case of repeated calls
+ * on the same display and screen arguments.
+ * The lookup code itself is taken from Tom LaStrange's ssetroot program.
+ *
+ * Most simple root window changing X programs can be converted to using
+ * virtual roots by just including
+ *
+ * #include <X11/vroot.h>
+ *
+ * after all the X11 header files. It has been tested on such popular
+ * X clients as xphoon, xfroot, xloadimage, and xaqua.
+ * It also works with the core clients xprop, xwininfo, xwd, and editres
+ * (and is necessary to get those clients working under tvtwm).
+ * It does NOT work with xsetroot; get the xsetroot replacement included in
+ * the tvtwm distribution instead.
+ *
+ * Andreas Stolcke <stolcke@ICSI.Berkeley.EDU>, 9/7/90
+ * - replaced all NULL's with properly cast 0's, 5/6/91
+ * - free children list (suggested by Mark Martin <mmm@cetia.fr>), 5/16/91
+ * - include X11/Xlib.h and support RootWindowOfScreen, too 9/17/91
+ *
+ * Jamie Zawinski <jwz@jwz.org>, 28-Apr-1997
+ * - use ANSI C
+ *
+ * Jamie Zawinski <jwz@jwz.org>, 3-Sep-2003
+ * - if the environment variable "XSCREENSAVER_WINDOW" is set, use that
+ * as the root window instead of searching for __SWM_VROOT.
+ *
+ * Jamie Zawinski <jwz@jwz.org>, 14-Aug-2004
+ * - changes to get gcc to stop whining about "type punning".
+ *
+ * Jamie Zawinski <jwz@jwz.org>, 16-Dec-2004
+ * - fixed that last fix.
+ */
+
+#ifndef _VROOT_H_
+#define _VROOT_H_
+#define _XSCREENSAVER_VROOT_H_
+
+#if !defined(lint) && !defined(SABER)
+static const char vroot_rcsid[] =
+"#Id: vroot.h,v 1.8 2004/12/16 05:33:54 jwz Exp #" "\n"
+"#Id: vroot.h,v 1.4 1991/09/30 19:23:16 stolcke Exp stolcke #";
+#endif
+
+#include <X11/X.h>
+#include <X11/Xatom.h>
+#include <X11/Xlib.h>
+
+static Window VirtualRootWindowOfScreen(Screen *screen)
+{
+ static Screen *save_screen = 0;
+ static Window root = (Window)0;
+
+ if(screen != save_screen) {
+ Display *dpy = DisplayOfScreen(screen);
+ Atom __SWM_VROOT = None;
+ int i;
+ Window rootReturn, parentReturn, *children;
+ unsigned int numChildren;
+
+ /* first check for a hex or decimal window ID in the environment */
+ const char *xss_id = getenv("XSCREENSAVER_WINDOW");
+ if(xss_id && *xss_id) {
+ unsigned long id = 0;
+ char c;
+ if(1 == sscanf (xss_id, " 0x%lx %c", &id, &c) ||
+ 1 == sscanf (xss_id, " %lu %c", &id, &c)) {
+ root = (Window) id;
+ save_screen = screen;
+ return root;
+ }
+ }
+
+ root = RootWindowOfScreen(screen);
+
+ /* go look for a virtual root */
+ __SWM_VROOT = XInternAtom(dpy, "__SWM_VROOT", False);
+ if(XQueryTree(dpy, root, &rootReturn, &parentReturn,
+ &children, &numChildren)) {
+ for(i=0; i<numChildren; i++) {
+ Atom actual_type;
+ int actual_format;
+ unsigned long nitems, bytesafter;
+ unsigned char *newRoot = 0;
+
+ if(XGetWindowProperty(dpy, children[i],
+ __SWM_VROOT, 0, 1, False, XA_WINDOW,
+ &actual_type, &actual_format,
+ &nitems, &bytesafter,
+ &newRoot) == Success
+ && newRoot) {
+ root = *((Window*) newRoot);
+ break;
+ }
+ }
+ if(children)
+ XFree((char*)children);
+ }
+
+ save_screen = screen;
+ }
+
+ return root;
+}
+
+#endif /* _VROOT_H_ */
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