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-rw-r--r--src/mesa/main/formats.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/src/mesa/main/formats.c b/src/mesa/main/formats.c
index cfaac04f13a..999e627c752 100644
--- a/src/mesa/main/formats.c
+++ b/src/mesa/main/formats.c
@@ -315,6 +315,9 @@ void
_mesa_get_format_block_size(mesa_format format, GLuint *bw, GLuint *bh)
{
const struct gl_format_info *info = _mesa_get_format_info(format);
+ /* Use _mesa_get_format_block_size_3d() for 3D blocks. */
+ assert(info->BlockDepth == 1);
+
*bw = info->BlockWidth;
*bh = info->BlockHeight;
}