1 files changed, 3 insertions, 3 deletions
diff --git a/sub/sub.h b/sub/sub.h
index 3cb140565c..3463022c88 100644
--- a/sub/sub.h
+++ b/sub/sub.h
@@ -25,11 +25,12 @@
 
 #include "mpvcore/m_option.h"
 
-// NOTE: VOs must support at least SUBBITMAP_RGBA.
+// NOTE: VOs must support at least SUBBITMAP_RGBA or SUBBITMAP_RGBA_STR.
 enum sub_bitmap_format {
     SUBBITMAP_EMPTY = 0,// no bitmaps; always has num_parts==0
     SUBBITMAP_LIBASS,   // A8, with a per-surface blend color (libass.color)
     SUBBITMAP_RGBA,     // B8G8R8A8 (MSB=A, LSB=B), scaled, premultiplied alpha
+    SUBBITMAP_RGBA_STR, // like RGBA, but straight (not premultiplied) alpha
     SUBBITMAP_INDEXED,  // scaled, bitmap points to osd_bmp_indexed
 
     SUBBITMAP_COUNT
@@ -38,8 +39,7 @@ enum sub_bitmap_format {
 // For SUBBITMAP_INDEXED
 struct osd_bmp_indexed {
     uint8_t *bitmap;
-    // Each entry is like a pixel in SUBBITMAP_RGBA format, but using straight
-    // alpha.
+    // Each entry is like a pixel in SUBBITMAP_RGBA_STR format.
     uint32_t palette[256];
 };