st/mesa: fix incorrect RowStride computation

Fixes incorrect stride when getting a compressed tex image.
2010-04-28 10:06:05 -06:00
parent 56f99ee640
commit 7b640f9f70
1 changed files with 4 additions and 1 deletions
@@ -931,7 +931,10 @@ st_get_tex_image(GLcontext * ctx, GLenum target, GLint level,
                                            PIPE_TRANSFER_READ, 0, 0,
                                            stImage->base.Width,
                                            stImage->base.Height);
-      texImage->RowStride = stImage->transfer->stride / util_format_get_blocksize(stImage->pt->format);
+      /* compute stride in texels from stride in bytes */
+      texImage->RowStride = stImage->transfer->stride
+         * util_format_get_blockwidth(stImage->pt->format)
+         / util_format_get_blocksize(stImage->pt->format);
   }
   else {
      /* Otherwise, the image should actually be stored in