http://packetstormsecurity.org/UNIX/admin/xscreensaver-4.02.tar.gz

[xscreensaver] / hacks / glx / moebius.c

diff --git a/hacks/glx/moebius.c b/hacks/glx/moebius.c
index 15e3732ee84e41b8743e19bda92df9137a3dd32e..0220cbbb2476a1c5b78a7092df334ce624968f9f 100644 (file)
--- a/hacks/glx/moebius.c
+++ b/hacks/glx/moebius.c
@@ -584,6 +584,7 @@ reshape_moebius(ModeInfo * mi, int width, int height)
 static void
 pinit(void)
 {
+    int status;
        glClearDepth(1.0);
        glClearColor(0.0, 0.0, 0.0, 1.0);
 
@@ -609,8 +610,21 @@ pinit(void)
        glDisable(GL_CULL_FACE);
 
        glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
-       gluBuild2DMipmaps(GL_TEXTURE_2D, 3, WoodTextureWidth, WoodTextureHeight,
-                         GL_RGB, GL_UNSIGNED_BYTE, WoodTextureData);
+
+    clear_gl_error();
+       status = gluBuild2DMipmaps(GL_TEXTURE_2D, 3,
+                               WoodTextureWidth, WoodTextureHeight,
+                               GL_RGB, GL_UNSIGNED_BYTE, WoodTextureData);
+    if (status)
+      {
+        const char *s = gluErrorString (status);
+        fprintf (stderr, "%s: error mipmapping %dx%d texture: %s\n",
+                 progname, WoodTextureWidth, WoodTextureHeight,
+                 (s ? s : "(unknown)"));
+        exit (1);
+      }
+    check_gl_error("mipmapping");
+
        glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
        glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
        glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);