268 lines
8.1 KiB
C
268 lines
8.1 KiB
C
/*
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* Copyright © 2007-2010 Intel Corporation
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*
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* Authors:
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* Jesse Barnes <jesse.barnes@intel.com>
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*
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*/
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/** @file omlsync.c
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* The program is simple: it paints a window alternating colors (red &
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* white) either as fast as possible or synchronized to vblank events
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*
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* If run normally, the program should display a window that exhibits
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* significant tearing between red and white colors (e.g. you might get
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* a "waterfall" effect of red and white horizontal bars).
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*
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* If run with the '-s b' option, the program should synchronize the
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* window color changes with the vertical blank period, resulting in a
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* window that looks orangish with a high frequency flicker (which may
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* be invisible). If the window is moved to another screen, this
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* property should be preserved. If the window spans two screens, it
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* shouldn't tear on whichever screen most of the window is on; the
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* portion on the other screen may show some tearing (like the
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* waterfall effect above).
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*
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* Other options include '-w <width>' and '-h <height>' to set the
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* window size.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <GL/gl.h>
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#include <GL/glu.h>
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#include <GL/glx.h>
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#include <GL/glxext.h>
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#include <X11/X.h>
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#include <X11/Xlib.h>
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#include <X11/Xutil.h>
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Bool (*glXGetSyncValuesOML)(Display *dpy, GLXDrawable drawable,
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int64_t *ust, int64_t *msc, int64_t *sbc);
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Bool (*glXGetMscRateOML)(Display *dpy, GLXDrawable drawable, int32_t *numerator,
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int32_t *denominator);
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int64_t (*glXSwapBuffersMscOML)(Display *dpy, GLXDrawable drawable,
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int64_t target_msc, int64_t divisor,
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int64_t remainder);
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Bool (*glXWaitForMscOML)(Display *dpy, GLXDrawable drawable, int64_t target_msc,
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int64_t divisor, int64_t remainder, int64_t *ust,
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int64_t *msc, int64_t *sbc);
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Bool (*glXWaitForSbcOML)(Display *dpy, GLXDrawable drawable, int64_t target_sbc,
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int64_t *ust, int64_t *msc, int64_t *sbc);
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int (*glXSwapInterval)(int interval);
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static int GLXExtensionSupported(Display *dpy, const char *extension)
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{
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const char *extensionsString, *pos;
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extensionsString = glXQueryExtensionsString(dpy, DefaultScreen(dpy));
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pos = strstr(extensionsString, extension);
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if (pos != NULL && (pos == extensionsString || pos[-1] == ' ') &&
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(pos[strlen(extension)] == ' ' || pos[strlen(extension)] == '\0'))
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return 1;
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return 0;
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}
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extern char *optarg;
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extern int optind, opterr, optopt;
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static char optstr[] = "w:h:vd:r:n:i:";
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static void usage(char *name)
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{
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printf("usage: %s [-w <width>] [-h <height>] ...\n", name);
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printf("\t-d<divisor> - divisor for OML swap\n");
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printf("\t-r<remainder> - remainder for OML swap\n");
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printf("\t-n<interval> - wait interval for OML WaitMSC\n");
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printf("\t-i<swap interval> - swap at most once every n frames\n");
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printf("\t-v: verbose (print count)\n");
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exit(-1);
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}
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int main(int argc, char *argv[])
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{
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Display *disp;
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XVisualInfo *pvi;
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XSetWindowAttributes swa;
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Window winGL;
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GLXContext context;
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int dummy;
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Atom wmDelete;
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int64_t ust, msc, sbc;
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int width = 500, height = 500, verbose = 0, divisor = 0, remainder = 0,
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wait_interval = 0, swap_interval = 1;
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int c, i = 1;
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int ret;
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int db_attribs[] = { GLX_RGBA,
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GLX_RED_SIZE, 1,
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GLX_GREEN_SIZE, 1,
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GLX_BLUE_SIZE, 1,
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GLX_DOUBLEBUFFER,
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GLX_DEPTH_SIZE, 1,
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None };
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XSizeHints sizehints;
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opterr = 0;
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while ((c = getopt(argc, argv, optstr)) != -1) {
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switch (c) {
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case 'w':
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width = atoi(optarg);
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break;
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case 'h':
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height = atoi(optarg);
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break;
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case 'v':
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verbose = 1;
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break;
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case 'd':
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divisor = atoi(optarg);
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break;
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case 'r':
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remainder = atoi(optarg);
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break;
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case 'n':
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wait_interval = atoi(optarg);
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break;
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case 'i':
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swap_interval = atoi(optarg);
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break;
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default:
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usage(argv[0]);
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break;
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}
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}
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disp = XOpenDisplay(NULL);
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if (!disp) {
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fprintf(stderr, "failed to open display\n");
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return -1;
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}
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if (!glXQueryExtension(disp, &dummy, &dummy)) {
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fprintf(stderr, "glXQueryExtension failed\n");
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return -1;
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}
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if (!GLXExtensionSupported(disp, "GLX_OML_sync_control")) {
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fprintf(stderr, "GLX_OML_sync_control not supported\n");
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return -1;
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}
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if (!GLXExtensionSupported(disp, "GLX_MESA_swap_control")) {
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fprintf(stderr, "GLX_MESA_swap_control not supported\n");
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return -1;
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}
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pvi = glXChooseVisual(disp, DefaultScreen(disp), db_attribs);
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if (!pvi) {
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fprintf(stderr, "failed to choose visual, exiting\n");
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return -1;
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}
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pvi->screen = DefaultScreen(disp);
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swa.colormap = XCreateColormap(disp, RootWindow(disp, pvi->screen),
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pvi->visual, AllocNone);
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swa.border_pixel = 0;
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swa.event_mask = ExposureMask | KeyPressMask | ButtonPressMask |
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StructureNotifyMask;
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winGL = XCreateWindow(disp, RootWindow(disp, pvi->screen),
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0, 0,
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width, height,
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0, pvi->depth, InputOutput, pvi->visual,
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CWBorderPixel | CWColormap | CWEventMask, &swa);
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if (!winGL) {
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fprintf(stderr, "window creation failed\n");
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return -1;
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}
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wmDelete = XInternAtom(disp, "WM_DELETE_WINDOW", True);
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XSetWMProtocols(disp, winGL, &wmDelete, 1);
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sizehints.x = 0;
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sizehints.y = 0;
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sizehints.width = width;
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sizehints.height = height;
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sizehints.flags = USSize | USPosition;
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XSetNormalHints(disp, winGL, &sizehints);
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XSetStandardProperties(disp, winGL, "glsync test", "glsync text",
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None, NULL, 0, &sizehints);
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context = glXCreateContext(disp, pvi, NULL, GL_TRUE);
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if (!context) {
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fprintf(stderr, "failed to create glx context\n");
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return -1;
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}
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XMapWindow(disp, winGL);
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ret = glXMakeCurrent(disp, winGL, context);
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if (!ret) {
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fprintf(stderr, "failed to make context current: %d\n", ret);
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}
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glXGetSyncValuesOML = (void *)glXGetProcAddress((unsigned char *)"glXGetSyncValuesOML");
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glXGetMscRateOML = (void *)glXGetProcAddress((unsigned char *)"glXGetMscRateOML");
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glXSwapBuffersMscOML = (void *)glXGetProcAddress((unsigned char *)"glXSwapBuffersMscOML");
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glXWaitForMscOML = (void *)glXGetProcAddress((unsigned char *)"glXWaitForMscOML");
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glXWaitForSbcOML = (void *)glXGetProcAddress((unsigned char *)"glXWaitForSbcOML");
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glXSwapInterval = (void *)glXGetProcAddress((unsigned char *)"glXSwapIntervalMESA");
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glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
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glXSwapInterval(swap_interval);
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fprintf(stderr, "set swap interval to %d\n", swap_interval);
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glXGetSyncValuesOML(disp, winGL, &ust, &msc, &sbc);
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while (i++) {
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/* Alternate colors to make tearing obvious */
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if (i & 1) {
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glClearColor(1.0f, 1.0f, 1.0f, 1.0f);
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glColor3f(1.0f, 1.0f, 1.0f);
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} else {
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glClearColor(1.0f, 0.0f, 0.0f, 0.0f);
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glColor3f(1.0f, 0.0f, 0.0f);
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}
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glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
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glRectf(0, 0, width, height);
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if (!wait_interval)
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glXSwapBuffersMscOML(disp, winGL, 0, divisor,
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remainder);
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else {
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glXWaitForMscOML(disp, winGL, msc + wait_interval,
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divisor, remainder, &ust, &msc, &sbc);
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glXSwapBuffersMscOML(disp, winGL, 0, 0, 0);
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}
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}
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XDestroyWindow(disp, winGL);
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glXDestroyContext(disp, context);
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XCloseDisplay(disp);
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return 0;
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}
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