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-rw-r--r--progs/xdemos/glsync.c295
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diff --git a/progs/xdemos/glsync.c b/progs/xdemos/glsync.c
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--- a/progs/xdemos/glsync.c
+++ /dev/null
@@ -1,295 +0,0 @@
-/*
- * Copyright © 2007 Intel Corporation
- *
- * 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 (including the next
- * paragraph) 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
- * THE AUTHORS OR COPYRIGHT HOLDERS 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.
- *
- * Authors:
- * Jesse Barnes <jesse.barnes@intel.com>
- *
- */
-
-/** @file glsync.c
- * The program is simple: it paints a window alternating colors (red &
- * white) either as fast as possible or synchronized to vblank events
- *
- * If run normally, the program should display a window that exhibits
- * significant tearing between red and white colors (e.g. you might get
- * a "waterfall" effect of red and white horizontal bars).
- *
- * If run with the '-s b' option, the program should synchronize the
- * window color changes with the vertical blank period, resulting in a
- * window that looks orangish with a high frequency flicker (which may
- * be invisible). If the window is moved to another screen, this
- * property should be preserved. If the window spans two screens, it
- * shouldn't tear on whichever screen most of the window is on; the
- * portion on the other screen may show some tearing (like the
- * waterfall effect above).
- *
- * Other options include '-w <width>' and '-h <height' to set the
- * window size.
- */
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-#include <GL/gl.h>
-#include <GL/glu.h>
-#include <GL/glx.h>
-#include <GL/glxext.h>
-#include <X11/X.h>
-#include <X11/Xlib.h>
-#include <X11/Xutil.h>
-
-void (*video_sync_get)();
-void (*video_sync)();
-void (*swap_interval)();
-
-static int GLXExtensionSupported(Display *dpy, const char *extension)
-{
- const char *extensionsString, *pos;
-
- extensionsString = glXQueryExtensionsString(dpy, DefaultScreen(dpy));
-
- pos = strstr(extensionsString, extension);
-
- if (pos != NULL && (pos == extensionsString || pos[-1] == ' ') &&
- (pos[strlen(extension)] == ' ' || pos[strlen(extension)] == '\0'))
- return 1;
-
- return 0;
-}
-
-extern char *optarg;
-extern int optind, opterr, optopt;
-static char optstr[] = "w:h:s:vi:";
-
-enum sync_type {
- none = 0,
- sgi_video_sync,
- buffer_swap
-};
-
-static void usage(char *name)
-{
- printf("usage: %s [-w <width>] [-h <height>] [-s<sync method>] "
- "[-v]\n", name);
- printf("\t-s<sync method>:\n");
- printf("\t\tn: none\n");
- printf("\t\ts: SGI video sync extension\n");
- printf("\t\tb: buffer swap\n");
- printf("\t-i<swap interval>\n");
- printf("\t-v: verbose (print count)\n");
- exit(-1);
-}
-
-int main(int argc, char *argv[])
-{
- Display *disp;
- XVisualInfo *pvi;
- XSetWindowAttributes swa;
- GLint last_val = -1, count = 0;
- Window winGL;
- GLXContext context;
- int dummy;
- Atom wmDelete;
- enum sync_type waitforsync = none;
- int width = 500, height = 500, verbose = 0, interval = 1;
- int c, i = 1;
- int ret;
- int attribs[] = { GLX_RGBA,
- GLX_RED_SIZE, 1,
- GLX_GREEN_SIZE, 1,
- GLX_BLUE_SIZE, 1,
- None };
- int db_attribs[] = { GLX_RGBA,
- GLX_RED_SIZE, 1,
- GLX_GREEN_SIZE, 1,
- GLX_BLUE_SIZE, 1,
- GLX_DOUBLEBUFFER,
- GLX_DEPTH_SIZE, 1,
- None };
- XSizeHints sizehints;
-
- opterr = 0;
- while ((c = getopt(argc, argv, optstr)) != -1) {
- switch (c) {
- case 'w':
- width = atoi(optarg);
- break;
- case 'h':
- height = atoi(optarg);
- break;
- case 's':
- switch (optarg[0]) {
- case 'n':
- waitforsync = none;
- break;
- case 's':
- waitforsync = sgi_video_sync;
- break;
- case 'b':
- waitforsync = buffer_swap;
- break;
- default:
- usage(argv[0]);
- break;
- }
- break;
- case 'v':
- verbose = 1;
- break;
- case 'i':
- interval = atoi(optarg);
- break;
- default:
- usage(argv[0]);
- break;
- }
- }
-
- disp = XOpenDisplay(NULL);
- if (!disp) {
- fprintf(stderr, "failed to open display\n");
- return -1;
- }
-
- if (!glXQueryExtension(disp, &dummy, &dummy)) {
- fprintf(stderr, "glXQueryExtension failed\n");
- return -1;
- }
-
- if (!GLXExtensionSupported(disp, "GLX_SGI_video_sync")) {
- fprintf(stderr, "GLX_SGI_video_sync not supported, exiting\n");
- return -1;
- }
-
- if (waitforsync != buffer_swap) {
- pvi = glXChooseVisual(disp, DefaultScreen(disp), attribs);
- } else {
- pvi = glXChooseVisual(disp, DefaultScreen(disp), db_attribs);
- }
-
- if (!pvi) {
- fprintf(stderr, "failed to choose visual, exiting\n");
- return -1;
- }
-
- pvi->screen = DefaultScreen(disp);
-
- swa.colormap = XCreateColormap(disp, RootWindow(disp, pvi->screen),
- pvi->visual, AllocNone);
- swa.border_pixel = 0;
- swa.event_mask = ExposureMask | KeyPressMask | ButtonPressMask |
- StructureNotifyMask;
- winGL = XCreateWindow(disp, RootWindow(disp, pvi->screen),
- 0, 0,
- width, height,
- 0, pvi->depth, InputOutput, pvi->visual,
- CWBorderPixel | CWColormap | CWEventMask, &swa);
- if (!winGL) {
- fprintf(stderr, "window creation failed\n");
- return -1;
- }
- wmDelete = XInternAtom(disp, "WM_DELETE_WINDOW", True);
- XSetWMProtocols(disp, winGL, &wmDelete, 1);
-
- sizehints.x = 0;
- sizehints.y = 0;
- sizehints.width = width;
- sizehints.height = height;
- sizehints.flags = USSize | USPosition;
-
- XSetNormalHints(disp, winGL, &sizehints);
- XSetStandardProperties(disp, winGL, "glsync test", "glsync text",
- None, NULL, 0, &sizehints);
-
- context = glXCreateContext(disp, pvi, NULL, GL_TRUE);
- if (!context) {
- fprintf(stderr, "failed to create glx context\n");
- return -1;
- }
-
- XMapWindow(disp, winGL);
- ret = glXMakeCurrent(disp, winGL, context);
- if (!ret) {
- fprintf(stderr, "failed to make context current: %d\n", ret);
- }
-
- video_sync_get = glXGetProcAddress((unsigned char *)"glXGetVideoSyncSGI");
- video_sync = glXGetProcAddress((unsigned char *)"glXWaitVideoSyncSGI");
-
- swap_interval = glXGetProcAddress((unsigned char *)"glXSwapIntervalSGI");
-
- if (!video_sync_get || !video_sync || !swap_interval) {
- fprintf(stderr, "failed to get sync functions\n");
- return -1;
- }
-
- if (waitforsync == buffer_swap) {
- swap_interval(interval);
- fprintf(stderr, "set swap interval to %d\n", interval);
- }
- video_sync_get(&count);
- count++;
- glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
- while (i++) {
- /* Alternate colors to make tearing obvious */
- if (i & 1) {
- glClearColor(1.0f, 1.0f, 1.0f, 1.0f);
- glColor3f(1.0f, 1.0f, 1.0f);
- } else {
- glClearColor(1.0f, 0.0f, 0.0f, 0.0f);
- glColor3f(1.0f, 0.0f, 0.0f);
- }
-
- glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
- glRectf(0, 0, width, height);
-
- /* Wait for vsync */
- if (waitforsync == sgi_video_sync) {
- if (verbose)
- fprintf(stderr, "waiting on count %d\n", count);
- video_sync(2, (count + 1) % 2, &count);
- if (count < last_val)
- fprintf(stderr, "error: vblank count went backwards: %d -> %d\n", last_val, count);
- if (count == last_val)
- fprintf(stderr, "error: count didn't change: %d\n", count);
- last_val = count;
- glFlush();
- } else if (waitforsync == buffer_swap) {
- glXSwapBuffers(disp, winGL);
- } else {
- video_sync_get(&count);
- sleep(1);
- glFinish();
- }
-
- if (verbose) {
- video_sync_get(&count);
- fprintf(stderr, "current count: %d\n", count);
- }
- }
-
- XDestroyWindow(disp, winGL);
- glXDestroyContext(disp, context);
- XCloseDisplay(disp);
-
- return 0;
-}
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