progs/xdemos/omlsync.c

   1 /*
   2  * Copyright © 2007-2010 Intel Corporation
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  21  * IN THE SOFTWARE.
  22  *
  23  * Authors:
  24  *    Jesse Barnes <jesse.barnes@intel.com>
  25  *
  26  */
  27
  28 /** @file omlsync.c
  29  * The program is simple:  it paints a window alternating colors (red &
  30  * white) either as fast as possible or synchronized to vblank events
  31  *
  32  * If run normally, the program should display a window that exhibits
  33  * significant tearing between red and white colors (e.g. you might get
  34  * a "waterfall" effect of red and white horizontal bars).
  35  *
  36  * If run with the '-s b' option, the program should synchronize the
  37  * window color changes with the vertical blank period, resulting in a
  38  * window that looks orangish with a high frequency flicker (which may
  39  * be invisible).  If the window is moved to another screen, this
  40  * property should be preserved.  If the window spans two screens, it
  41  * shouldn't tear on whichever screen most of the window is on; the
  42  * portion on the other screen may show some tearing (like the
  43  * waterfall effect above).
  44  *
  45  * Other options include '-w <width>' and '-h <height>' to set the
  46  * window size.
  47  */
  48 #include <stdio.h>
  49 #include <stdlib.h>
  50 #include <string.h>
  51 #include <unistd.h>
  52 #include <GL/gl.h>
  53 #include <GL/glu.h>
  54 #include <GL/glx.h>
  55 #include <GL/glxext.h>
  56 #include <X11/X.h>
  57 #include <X11/Xlib.h>
  58 #include <X11/Xutil.h>
  59
  60 Bool (*glXGetSyncValuesOML)(Display *dpy, GLXDrawable drawable,
  61                             int64_t *ust, int64_t *msc, int64_t *sbc);
  62 Bool (*glXGetMscRateOML)(Display *dpy, GLXDrawable drawable, int32_t *numerator,
  63                          int32_t *denominator);
  64 int64_t (*glXSwapBuffersMscOML)(Display *dpy, GLXDrawable drawable,
  65                                 int64_t target_msc, int64_t divisor,
  66                                 int64_t remainder);
  67 Bool (*glXWaitForMscOML)(Display *dpy, GLXDrawable drawable, int64_t target_msc,
  68                          int64_t divisor, int64_t remainder, int64_t *ust,
  69                          int64_t *msc, int64_t *sbc);
  70 Bool (*glXWaitForSbcOML)(Display *dpy, GLXDrawable drawable, int64_t target_sbc,
  71                          int64_t *ust, int64_t *msc, int64_t *sbc);
  72 int (*glXSwapInterval)(int interval);
  73
  74 static int GLXExtensionSupported(Display *dpy, const char *extension)
  75 {
  76         const char *extensionsString, *pos;
  77
  78         extensionsString = glXQueryExtensionsString(dpy, DefaultScreen(dpy));
  79
  80         pos = strstr(extensionsString, extension);
  81
  82         if (pos != NULL && (pos == extensionsString || pos[-1] == ' ') &&
  83             (pos[strlen(extension)] == ' ' || pos[strlen(extension)] == '\0'))
  84                 return 1;
  85
  86         return 0;
  87 }
  88
  89 extern char *optarg;
  90 extern int optind, opterr, optopt;
  91 static char optstr[] = "w:h:vd:r:n:i:";
  92
  93 static void usage(char *name)
  94 {
  95         printf("usage: %s [-w <width>] [-h <height>] ...\n", name);
  96         printf("\t-d<divisor> - divisor for OML swap\n");
  97         printf("\t-r<remainder> - remainder for OML swap\n");
  98         printf("\t-n<interval> - wait interval for OML WaitMSC\n");
  99         printf("\t-i<swap interval> - swap at most once every n frames\n");
 100         printf("\t-v: verbose (print count)\n");
 101         exit(-1);
 102 }
 103
 104 int main(int argc, char *argv[])
 105 {
 106         Display *disp;
 107         XVisualInfo *pvi;
 108         XSetWindowAttributes swa;
 109         Window winGL;
 110         GLXContext context;
 111         int dummy;
 112         Atom wmDelete;
 113         int64_t ust, msc, sbc;
 114         int width = 500, height = 500, verbose = 0, divisor = 0, remainder = 0,
 115                 wait_interval = 0, swap_interval = 1;
 116         int c, i = 1;
 117         int ret;
 118         int db_attribs[] = { GLX_RGBA,
 119                      GLX_RED_SIZE, 1,
 120                      GLX_GREEN_SIZE, 1,
 121                      GLX_BLUE_SIZE, 1,
 122                      GLX_DOUBLEBUFFER,
 123                      GLX_DEPTH_SIZE, 1,
 124                      None };
 125         XSizeHints sizehints;
 126
 127         opterr = 0;
 128         while ((c = getopt(argc, argv, optstr)) != -1) {
 129                 switch (c) {
 130                 case 'w':
 131                         width = atoi(optarg);
 132                         break;
 133                 case 'h':
 134                         height = atoi(optarg);
 135                         break;
 136                 case 'v':
 137                         verbose = 1;
 138                         break;
 139                 case 'd':
 140                         divisor = atoi(optarg);
 141                         break;
 142                 case 'r':
 143                         remainder = atoi(optarg);
 144                         break;
 145                 case 'n':
 146                         wait_interval = atoi(optarg);
 147                         break;
 148                 case 'i':
 149                         swap_interval = atoi(optarg);
 150                         break;
 151                 default:
 152                         usage(argv[0]);
 153                         break;
 154                 }
 155         }
 156
 157         disp = XOpenDisplay(NULL);
 158         if (!disp) {
 159                 fprintf(stderr, "failed to open display\n");
 160                 return -1;
 161         }
 162
 163         if (!glXQueryExtension(disp, &dummy, &dummy)) {
 164                 fprintf(stderr, "glXQueryExtension failed\n");
 165                 return -1;
 166         }
 167
 168         if (!GLXExtensionSupported(disp, "GLX_OML_sync_control")) {
 169                 fprintf(stderr, "GLX_OML_sync_control not supported\n");
 170                 return -1;
 171         }
 172
 173         if (!GLXExtensionSupported(disp, "GLX_MESA_swap_control")) {
 174                 fprintf(stderr, "GLX_MESA_swap_control not supported\n");
 175                 return -1;
 176         }
 177
 178         pvi = glXChooseVisual(disp, DefaultScreen(disp), db_attribs);
 179
 180         if (!pvi) {
 181                 fprintf(stderr, "failed to choose visual, exiting\n");
 182                 return -1;
 183         }
 184
 185         pvi->screen = DefaultScreen(disp);
 186
 187         swa.colormap = XCreateColormap(disp, RootWindow(disp, pvi->screen),
 188                                        pvi->visual, AllocNone);
 189         swa.border_pixel = 0;
 190         swa.event_mask = ExposureMask | KeyPressMask | ButtonPressMask |
 191                 StructureNotifyMask;
 192         winGL = XCreateWindow(disp, RootWindow(disp, pvi->screen),
 193                               0, 0,
 194                               width, height,
 195                               0, pvi->depth, InputOutput, pvi->visual,
 196                               CWBorderPixel | CWColormap | CWEventMask, &swa);
 197         if (!winGL) {
 198                 fprintf(stderr, "window creation failed\n");
 199                 return -1;
 200         }
 201         wmDelete = XInternAtom(disp, "WM_DELETE_WINDOW", True);
 202         XSetWMProtocols(disp, winGL, &wmDelete, 1);
 203
 204         sizehints.x = 0;
 205         sizehints.y = 0;
 206         sizehints.width  = width;
 207         sizehints.height = height;
 208         sizehints.flags = USSize | USPosition;
 209
 210         XSetNormalHints(disp, winGL, &sizehints);
 211         XSetStandardProperties(disp, winGL, "glsync test", "glsync text",
 212                                None, NULL, 0, &sizehints);
 213
 214         context = glXCreateContext(disp, pvi, NULL, GL_TRUE);
 215         if (!context) {
 216                 fprintf(stderr, "failed to create glx context\n");
 217                 return -1;
 218         }
 219
 220         XMapWindow(disp, winGL);
 221         ret = glXMakeCurrent(disp, winGL, context);
 222         if (!ret) {
 223                 fprintf(stderr, "failed to make context current: %d\n", ret);
 224         }
 225
 226         glXGetSyncValuesOML = (void *)glXGetProcAddress((unsigned char *)"glXGetSyncValuesOML");
 227         glXGetMscRateOML = (void *)glXGetProcAddress((unsigned char *)"glXGetMscRateOML");
 228         glXSwapBuffersMscOML = (void *)glXGetProcAddress((unsigned char *)"glXSwapBuffersMscOML");
 229         glXWaitForMscOML = (void *)glXGetProcAddress((unsigned char *)"glXWaitForMscOML");
 230         glXWaitForSbcOML = (void *)glXGetProcAddress((unsigned char *)"glXWaitForSbcOML");
 231         glXSwapInterval = (void *)glXGetProcAddress((unsigned char *)"glXSwapIntervalMESA");
 232
 233         glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 234
 235         glXSwapInterval(swap_interval);
 236         fprintf(stderr, "set swap interval to %d\n", swap_interval);
 237
 238         glXGetSyncValuesOML(disp, winGL, &ust, &msc, &sbc);
 239         while (i++) {
 240                 /* Alternate colors to make tearing obvious */
 241                 if (i & 1) {
 242                         glClearColor(1.0f, 1.0f, 1.0f, 1.0f);
 243                         glColor3f(1.0f, 1.0f, 1.0f);
 244                 } else {
 245                         glClearColor(1.0f, 0.0f, 0.0f, 0.0f);
 246                         glColor3f(1.0f, 0.0f, 0.0f);
 247                 }
 248
 249                 glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 250                 glRectf(0, 0, width, height);
 251
 252                 if (!wait_interval)
 253                         glXSwapBuffersMscOML(disp, winGL, 0, divisor,
 254                                              remainder);
 255                 else {
 256                         glXWaitForMscOML(disp, winGL, msc + wait_interval,
 257                                          divisor, remainder, &ust, &msc, &sbc);
 258                         glXSwapBuffersMscOML(disp, winGL, 0, 0, 0);
 259                 }
 260         }
 261
 262         XDestroyWindow(disp, winGL);
 263         glXDestroyContext(disp, context);
 264         XCloseDisplay(disp);
 265
 266         return 0;
 267 }