--- /dev/null
+/*
+ * Copyright © 2007-2010 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 omlsync.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>
+
+Bool (*glXGetSyncValuesOML)(Display *dpy, GLXDrawable drawable,
+ int64_t *ust, int64_t *msc, int64_t *sbc);
+Bool (*glXGetMscRateOML)(Display *dpy, GLXDrawable drawable, int32_t *numerator,
+ int32_t *denominator);
+int64_t (*glXSwapBuffersMscOML)(Display *dpy, GLXDrawable drawable,
+ int64_t target_msc, int64_t divisor,
+ int64_t remainder);
+Bool (*glXWaitForMscOML)(Display *dpy, GLXDrawable drawable, int64_t target_msc,
+ int64_t divisor, int64_t remainder, int64_t *ust,
+ int64_t *msc, int64_t *sbc);
+Bool (*glXWaitForSbcOML)(Display *dpy, GLXDrawable drawable, int64_t target_sbc,
+ int64_t *ust, int64_t *msc, int64_t *sbc);
+
+static int GLXExtensionSupported(Display *dpy, const char *extension)
+{
+ const char *extensionsString, *client_extensions, *pos;
+
+ extensionsString = glXQueryExtensionsString(dpy, DefaultScreen(dpy));
+ client_extensions = glXGetClientString(dpy, GLX_EXTENSIONS);
+
+ pos = strstr(extensionsString, extension);
+
+ if (pos != NULL && (pos == extensionsString || pos[-1] == ' ') &&
+ (pos[strlen(extension)] == ' ' || pos[strlen(extension)] == '\0'))
+ return 1;
+
+ pos = strstr(client_extensions, 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:vd:r:n:";
+
+static void usage(char *name)
+{
+ printf("usage: %s [-w <width>] [-h <height>] [-i<swap interval>] "
+ "[-n<wait interval>] [-v]\n", name);
+ printf("\t-i<swap interval> - swap at most once every n frames\n");
+ printf("\t-n<wait interval> - wait n frames between swaps\n");
+ printf("\t-v: verbose (print count)\n");
+ exit(-1);
+}
+
+int main(int argc, char *argv[])
+{
+ Display *disp;
+ XVisualInfo *pvi;
+ XSetWindowAttributes swa;
+ Window winGL;
+ GLXContext context;
+ int dummy;
+ Atom wmDelete;
+ int width = 500, height = 500, verbose = 0, divisor = 0, remainder = 0,
+ wait_interval = 0;
+ int c, i = 1;
+ int ret;
+ 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 'v':
+ verbose = 1;
+ break;
+ case 'd':
+ divisor = atoi(optarg);
+ break;
+ case 'r':
+ remainder = atoi(optarg);
+ break;
+ case 'n':
+ wait_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_OML_sync_control")) {
+ fprintf(stderr, "GLX_OML_sync_control not supported\n");
+ return -1;
+ }
+
+ 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);
+ }
+
+ glXGetSyncValuesOML = (void *)glXGetProcAddress((unsigned char *)"glXGetSyncValuesOML");
+ glXGetMscRateOML = (void *)glXGetProcAddress((unsigned char *)"glXGetMscRateOML");
+ glXSwapBuffersMscOML = (void *)glXGetProcAddress((unsigned char *)"glXSwapBuffersMscOML");
+ glXWaitForMscOML = (void *)glXGetProcAddress((unsigned char *)"glXWaitForMscOML");
+ glXWaitForSbcOML = (void *)glXGetProcAddress((unsigned char *)"glXWaitForSbcOML");
+
+ 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);
+
+ glXSwapBuffersMscOML(disp, winGL, 0, divisor, remainder);
+ }
+
+ XDestroyWindow(disp, winGL);
+ glXDestroyContext(disp, context);
+ XCloseDisplay(disp);
+
+ return 0;
+}
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