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-rw-r--r--progs/xdemos/texture_from_pixmap.c19
1 files changed, 16 insertions, 3 deletions
diff --git a/progs/xdemos/texture_from_pixmap.c b/progs/xdemos/texture_from_pixmap.c
index 50870c4df4..ab215b0ac3 100644
--- a/progs/xdemos/texture_from_pixmap.c
+++ b/progs/xdemos/texture_from_pixmap.c
@@ -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);
*/
}