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use glXGetProcAddress to get extension funcs

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This commit is contained in:
Brian
2007-05-29 08:05:10 -06:00
parent 5237f863ed
commit 0c5662acc7
1 changed files with 16 additions and 3 deletions
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progs/xdemos/texture_from_pixmap.c
+16 -3
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@@ -43,6 +43,9 @@
static float top, bottom;
static PFNGLXBINDTEXIMAGEEXTPROC glXBindTexImageEXT_func = NULL;
static PFNGLXRELEASETEXIMAGEEXTPROC glXReleaseTexImageEXT_func = NULL;
static Display *
OpenDisplay(void)
@@ -60,10 +63,20 @@ OpenDisplay(void)
screen = DefaultScreen(dpy);
ext = glXQueryExtensionsString(dpy, screen);
if (!strstr(ext, "GLX_EXT_texture_from_pixmap")) {
printf("GLX_EXT_texture_from_pixmap not supported by GLX\n");
fprintf(stderr, "GLX_EXT_texture_from_pixmap not supported.\n");
exit(1);
}
glXBindTexImageEXT_func = (PFNGLXBINDTEXIMAGEEXTPROC)
glXGetProcAddress((GLubyte *) "glXBindTexImageEXT");
glXReleaseTexImageEXT_func = (PFNGLXRELEASETEXIMAGEEXTPROC)
glXGetProcAddress((GLubyte*) "glXReleaseTexImageEXT");
if (!glXBindTexImageEXT_func || !glXReleaseTexImageEXT_func) {
fprintf(stderr, "glXGetProcAddress failed!\n");
exit(1);
}
return dpy;
}
@@ -241,14 +254,14 @@ BindPixmapTexture(Display *dpy, GLXPixmap gp)
glGenTextures(1, &texture);
glBindTexture(GL_TEXTURE_2D, texture);
glXBindTexImageEXT(dpy, gp, GLX_FRONT_LEFT_EXT, NULL);
glXBindTexImageEXT_func(dpy, gp, GLX_FRONT_LEFT_EXT, NULL);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glEnable(GL_TEXTURE_2D);
/*
glXReleaseTexImageEXT (display, glxpixmap, GLX_FRONT_LEFT_EXT);
glXReleaseTexImageEXT_func(display, glxpixmap, GLX_FRONT_LEFT_EXT);
*/
}