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Diffstat (limited to 'progs/xdemos/glsync.c')
-rw-r--r-- | progs/xdemos/glsync.c | 295 |
1 files changed, 0 insertions, 295 deletions
diff --git a/progs/xdemos/glsync.c b/progs/xdemos/glsync.c deleted file mode 100644 index 3751373e23..0000000000 --- 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; -} |