st/mesa: fix computation of last_level in GenerateMipmap

Array textures were broken.

NOTE: This is a candidate for the stable branches.

Reviewed-by: Brian Paul <[email protected]>
Reviewed-by: Dave Airlie <[email protected]>

1 files changed, 7 insertions, 21 deletions

diff --git a/src/mesa/state_tracker/st_gen_mipmap.c b/src/mesa/state_tracker/st_gen_mipmap.c
index 889200686e4..c0926131254 100644
--- a/src/mesa/state_tracker/st_gen_mipmap.c
+++ b/src/mesa/state_tracker/st_gen_mipmap.c
@@ -121,30 +121,16 @@ compute_num_levels(struct gl_context *ctx,
                    struct gl_texture_object *texObj,
                    GLenum target)
 {
-   if (target == GL_TEXTURE_RECTANGLE_ARB) {
-      return 1;
-   }
-   else {
-      const struct gl_texture_image *baseImage = 
-         _mesa_get_tex_image(ctx, texObj, target, texObj->BaseLevel);
-      GLuint size, numLevels;
+   const struct gl_texture_image *baseImage;
+   GLuint numLevels;
 
-      size = MAX2(baseImage->Width2, baseImage->Height2);
-      size = MAX2(size, baseImage->Depth2);
+   baseImage = _mesa_get_tex_image(ctx, texObj, target, texObj->BaseLevel);
 
-      numLevels = texObj->BaseLevel;
-
-      while (size > 0) {
-         numLevels++;
-         size >>= 1;
-      }
+   numLevels = texObj->BaseLevel + baseImage->MaxNumLevels;
+   numLevels = MIN2(numLevels, texObj->MaxLevel + 1);
+   assert(numLevels >= 1);
 
-      numLevels = MIN2(numLevels, texObj->MaxLevel + 1);
-
-      assert(numLevels >= 1);
-
-      return numLevels;
-   }
+   return numLevels;
 }