struct region_cache *width_run_cache;
struct region_cache *bidi_paragraph_cache;
- /* Non-zero means don't use redisplay optimizations for
- displaying this buffer. */
+ /* Non-zero means disable redisplay optimizations when rebuilding the glyph
+ matrices (but not when redrawing). */
bool_bf prevent_redisplay_optimizations_p : 1;
/* Non-zero whenever the narrowing is changed in this buffer. */
set this directly, use SET_FRAME_ICONIFIED instead. */
bool_bf iconified : 1;
- /* True if this frame should be redrawn. */
+ /* True if this frame should be fully redisplayed. Disables all
+ optimizations while rebuilding matrices and redrawing. */
bool_bf garbaged : 1;
/* False means, if this frame has just one window,