radeon: Cope better with texture images with no miptrees.

Fixes crash with compiz magnifier plugin.

diff --git a/src/mesa/drivers/dri/radeon/radeon_texture.c b/src/mesa/drivers/dri/radeon/radeon_texture.c
index 049284ef8c588062d261ddabed6a2e5c826c3351..7b7392b21798ef395f949ff5e7ec335d15932a4e 100644 (file)
--- a/src/mesa/drivers/dri/radeon/radeon_texture.c
+++ b/src/mesa/drivers/dri/radeon/radeon_texture.c
@@ -101,7 +101,12 @@ void radeonFreeTexImageData(GLcontext *ctx, struct gl_texture_image *timage)
 /* Set Data pointer and additional data for mapped texture image */
 static void teximage_set_map_data(radeon_texture_image *image)
 {
-       radeon_mipmap_level *lvl = &image->mt->levels[image->mtlevel];
+       radeon_mipmap_level *lvl;
+
+       if (!image->mt)
+               return;
+
+       lvl = &image->mt->levels[image->mtlevel];
 
        image->base.Data = image->mt->bo->ptr + lvl->faces[image->mtface].offset;
        image->base.RowStride = lvl->rowstride / image->mt->bpp;
@@ -969,7 +974,7 @@ int radeon_validate_texture_miptree(GLcontext * ctx, struct gl_texture_object *t
                        radeon_texture_image *image = get_radeon_texture_image(texObj->Image[face][level]);
                        if (RADEON_DEBUG & RADEON_TEXTURE)
                                fprintf(stderr, " face %i, level %i... %p vs %p ", face, level, t->mt, image->mt);
-                       if (t->mt == image->mt) {
+                       if (t->mt == image->mt || (!image->mt && !image->base.Data)) {
                                if (RADEON_DEBUG & RADEON_TEXTURE)
                                        fprintf(stderr, "OK\n");