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Diffstat (limited to 'progs/xdemos/omlsync.c')
| -rw-r--r-- | progs/xdemos/omlsync.c | 250 |
1 files changed, 250 insertions, 0 deletions
diff --git a/progs/xdemos/omlsync.c b/progs/xdemos/omlsync.c new file mode 100644 index 00000000000..4eee849b532 --- /dev/null +++ b/progs/xdemos/omlsync.c @@ -0,0 +1,250 @@ +/* + * 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 <[email protected]> + * + */ + +/** @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; +} |