Set blue channel to 128 for BC5S

python-pillow · Sep 21, 2023 · 352bcaa · 352bcaa
1 parent e57b08a
commit 352bcaa
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diff --git a/Tests/images/bc5s.png b/Tests/images/bc5s.png
diff --git a/src/libImaging/BcnDecode.c b/src/libImaging/BcnDecode.c
@@ -854,7 +854,7 @@ decode_bcn(
             int sign = strcmp(pixel_format, "BC5S") == 0 ? 1 : 0;
             while (bytes >= 16) {
                 rgba col[16];
-                memset(col, 0, 16 * sizeof(col[0]));
+                memset(col, sign ? 128 : 0, 16 * sizeof(col[0]));
                 decode_bc5_block(col, ptr, sign);
                 put_block(im, state, (const char *)col, sizeof(col[0]), C);
                 ptr += 16;