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-rw-r--r--src/mesa/main/formats.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/src/mesa/main/formats.c b/src/mesa/main/formats.c
index 60e8ae390a5..e88ba43971b 100644
--- a/src/mesa/main/formats.c
+++ b/src/mesa/main/formats.c
@@ -1118,8 +1118,10 @@ _mesa_get_format_name(gl_format format)
* Return bytes needed to store a block of pixels in the given format.
* Normally, a block is 1x1 (a single pixel). But for compressed formats
* a block may be 4x4 or 8x4, etc.
+ *
+ * Note: not GLuint, so as not to coerce math to unsigned. cf. fdo #37351
*/
-GLuint
+GLint
_mesa_get_format_bytes(gl_format format)
{
const struct gl_format_info *info = _mesa_get_format_info(format);