Attachment 17521 Details for Bug 16612 – glswap.c

glswap.c

glswap.c (text/plain), 3.18 KB, created by liuhaien on 2008-07-03 23:09:48 UTC

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Creator: liuhaien

Created: 2008-07-03 23:09:48 UTC

Size: 3.18 KB

patch

obsolete

>#include <stdio.h>
>#include <stdlib.h>
>#include <string.h>
>#include <unistd.h>
># define GLX_GLXEXT_PROTOTYPES
>#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>
>
>PFNGLXSWAPINTERVALMESAPROC set_swap_interval = NULL;
>
>static int GLXExtensionSupported(Display *dpy, const char *extension)
>{
>    const char *extensionsString, *pos;
>
>    extensionsString = glXQueryExtensionsString(dpy, DefaultScreen(dpy));
>
>    pos = strstr(extensionsString, extension);
>
>    return pos != NULL && (pos == extensionsString || pos[-1] == ' ') &&
>	    (pos[strlen(extension)] == ' ' || pos[strlen(extension)] == '\0');
>}
>
>
>int main(int argc, char *argv[])
>{
>	Display *disp;
>	XVisualInfo *pvi;
>	XSetWindowAttributes swa;
>	int attrib[]= { GLX_RGBA,
>			GLX_DOUBLEBUFFER,
>			GLX_RED_SIZE, 1,
>			GLX_GREEN_SIZE, 1,
>			GLX_BLUE_SIZE, 1,
>			None };
>	GLXContext context;
>	Window winGL;
>	unsigned int count;
>	int dummy;
>	Atom wmDelete;
>	int width = 500, height = 500, waitforsync = 0, swapcontrol = 0;
>	int c, i = 1;
>
>	opterr = 0;
>
>	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_swap_control")) {
>		fprintf(stderr, "GLX_SGI_swap_control not supported, exiting\n");
>		return -1;
>	}
>
>	pvi = glXChooseVisual(disp, DefaultScreen(disp), attrib);
>	if (!pvi) {
>		fprintf(stderr, "failed to choose visual, exiting\n");
>		return -1;
>	}
>
>	context = glXCreateContext(disp, pvi, None, GL_TRUE);
>	if (!context) {
>		fprintf(stderr, "failed to create glx context\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);
>
>	XSetStandardProperties(disp, winGL, "glswap test", "glswap text",
>			       None, NULL, 0, NULL);
>
>	XMapRaised(disp, winGL);
>
>	glXMakeCurrent(disp, winGL, context);
>
>	set_swap_interval = (PFNGLXSWAPINTERVALMESAPROC) glXGetProcAddressARB( (const GLubyte *) "glXSwapIntervalSGI" );
>
>	swapcontrol = 1;
>
>	if (set_swap_interval && swapcontrol)
>		(*set_swap_interval)( 1 );
>
>	while (i++) {
>
>		/* Alternate colors to make tearing obvious */
>		if (i & 1)
>			glClearColor(1.0f, 1.0f, 1.0f, 1.0f);
>		else
>			glClearColor(1.0f, 0.0f, 0.0f, 0.0f);
>		glClear(GL_COLOR_BUFFER_BIT);
>		glFlush();
>		glXSwapBuffers(disp, winGL);
>	}
>
>	XDestroyWindow(disp, winGL);
>	glXDestroyContext(disp, context);
>	XCloseDisplay(disp);
>
>	return 0;
>}

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Attachments on bug 16612: 17516 | 17517 | 17518 | 17521

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