avoid calling compression when there is nothing to do

Signed-off-by: Kimball Thurston <[email protected]>
AcademySoftwareFoundation · Sep 19, 2024 · 76c932a · 76c932a
1 parent 8f76f50
commit 76c932a
Showing 1 changed file with 3 additions and 1 deletion.
diff --git a/src/lib/OpenEXRCore/compression.c b/src/lib/OpenEXRCore/compression.c
@@ -509,7 +509,9 @@ exr_uncompress_chunk (exr_decode_pipeline_t* decode)
         if ((decode->decode_flags & EXR_DECODE_SAMPLE_DATA_ONLY)) return rv;
     }
 
-    if (rv == EXR_ERR_SUCCESS)
+    if (rv == EXR_ERR_SUCCESS &&
+        decode->chunk.packed_size > 0 &&
+        decode->chunk.unpacked_size > 0)
         rv = decompress_data (
             ctxt,
             part->comp_type,