From 2e7b7811645bfc26c77b58ba6f55ddd974ebafd8 Mon Sep 17 00:00:00 2001
From: dumbbell <dumbbell@FreeBSD.org>
Date: Fri, 19 Sep 2014 11:02:44 +0000
Subject: vt(4): Remove vt_buf->vb_dirtymask

This structure and the associated functions were unused since the
implementation of vd_bitblt_text_t callbacks.

MFC after:	3 days
---
 sys/dev/vt/vt.h      |  8 +-------
 sys/dev/vt/vt_buf.c  | 41 +----------------------------------------
 sys/dev/vt/vt_core.c |  4 +---
 3 files changed, 3 insertions(+), 50 deletions(-)

(limited to 'sys')

diff --git a/sys/dev/vt/vt.h b/sys/dev/vt/vt.h
index 3fbbdec..f384a60 100644
--- a/sys/dev/vt/vt.h
+++ b/sys/dev/vt/vt.h
@@ -172,11 +172,6 @@ struct vt_device {
  * been modified.
  */
 
-struct vt_bufmask {
-	uint64_t		 vbm_row, vbm_col;
-#define	VBM_DIRTY		UINT64_MAX
-};
-
 struct vt_buf {
 	struct mtx		 vb_lock;	/* Buffer lock. */
 	term_pos_t		 vb_scr_size;	/* (b) Screen dimensions. */
@@ -195,7 +190,6 @@ struct vt_buf {
 	term_pos_t		 vb_mark_end;	/* (b) Copy region end. */
 	int			 vb_mark_last;	/* Last mouse event. */
 	term_rect_t		 vb_dirtyrect;	/* (b) Dirty rectangle. */
-	struct vt_bufmask	 vb_dirtymask;	/* (b) Dirty bitmasks. */
 	term_char_t		*vb_buffer;	/* (u) Data buffer. */
 	term_char_t		**vb_rows;	/* (u) Array of rows */
 };
@@ -209,7 +203,7 @@ void vtbuf_putchar(struct vt_buf *, const term_pos_t *, term_char_t);
 void vtbuf_cursor_position(struct vt_buf *, const term_pos_t *);
 void vtbuf_scroll_mode(struct vt_buf *vb, int yes);
 void vtbuf_dirty(struct vt_buf *vb, const term_rect_t *area);
-void vtbuf_undirty(struct vt_buf *, term_rect_t *, struct vt_bufmask *);
+void vtbuf_undirty(struct vt_buf *, term_rect_t *);
 void vtbuf_sethistory_size(struct vt_buf *, int);
 int vtbuf_iscursor(const struct vt_buf *vb, int row, int col);
 void vtbuf_cursor_visibility(struct vt_buf *, int);
diff --git a/sys/dev/vt/vt_buf.c b/sys/dev/vt/vt_buf.c
index 28a7082..0c184ec 100644
--- a/sys/dev/vt/vt_buf.c
+++ b/sys/dev/vt/vt_buf.c
@@ -195,39 +195,6 @@ vtbuf_iscursor(const struct vt_buf *vb, int row, int col)
 	return (0);
 }
 
-static inline uint64_t
-vtbuf_dirty_axis(unsigned int begin, unsigned int end)
-{
-	uint64_t left, right, mask;
-
-	/*
-	 * Mark all bits between begin % 64 and end % 64 dirty.
-	 * This code is functionally equivalent to:
-	 *
-	 * 	for (i = begin; i < end; i++)
-	 * 		mask |= (uint64_t)1 << (i % 64);
-	 */
-
-	/* Obvious case. Mark everything dirty. */
-	if (end - begin >= 64)
-		return (VBM_DIRTY);
-
-	/* 1....0; used bits on the left. */
-	left = VBM_DIRTY << begin % 64;
-	/* 0....1; used bits on the right. */
-	right = VBM_DIRTY >> -end % 64;
-
-	/*
-	 * Only take the intersection.  If the result of that is 0, it
-	 * means that the selection crossed a 64 bit boundary along the
-	 * way, which means we have to take the complement.
-	 */
-	mask = left & right;
-	if (mask == 0)
-		mask = left | right;
-	return (mask);
-}
-
 static inline void
 vtbuf_dirty_locked(struct vt_buf *vb, const term_rect_t *area)
 {
@@ -240,10 +207,6 @@ vtbuf_dirty_locked(struct vt_buf *vb, const term_rect_t *area)
 		vb->vb_dirtyrect.tr_end.tp_row = area->tr_end.tp_row;
 	if (vb->vb_dirtyrect.tr_end.tp_col < area->tr_end.tp_col)
 		vb->vb_dirtyrect.tr_end.tp_col = area->tr_end.tp_col;
-	vb->vb_dirtymask.vbm_row |=
-	    vtbuf_dirty_axis(area->tr_begin.tp_row, area->tr_end.tp_row);
-	vb->vb_dirtymask.vbm_col |=
-	    vtbuf_dirty_axis(area->tr_begin.tp_col, area->tr_end.tp_col);
 }
 
 void
@@ -272,16 +235,14 @@ vtbuf_make_undirty(struct vt_buf *vb)
 
 	vb->vb_dirtyrect.tr_begin = vb->vb_scr_size;
 	vb->vb_dirtyrect.tr_end.tp_row = vb->vb_dirtyrect.tr_end.tp_col = 0;
-	vb->vb_dirtymask.vbm_row = vb->vb_dirtymask.vbm_col = 0;
 }
 
 void
-vtbuf_undirty(struct vt_buf *vb, term_rect_t *r, struct vt_bufmask *m)
+vtbuf_undirty(struct vt_buf *vb, term_rect_t *r)
 {
 
 	VTBUF_LOCK(vb);
 	*r = vb->vb_dirtyrect;
-	*m = vb->vb_dirtymask;
 	vtbuf_make_undirty(vb);
 	VTBUF_UNLOCK(vb);
 }
diff --git a/sys/dev/vt/vt_core.c b/sys/dev/vt/vt_core.c
index f9e6b25..8f2e245 100644
--- a/sys/dev/vt/vt_core.c
+++ b/sys/dev/vt/vt_core.c
@@ -992,7 +992,6 @@ vt_flush(struct vt_device *vd)
 {
 	struct vt_window *vw;
 	struct vt_font *vf;
-	struct vt_bufmask tmask;
 	term_rect_t tarea;
 	term_pos_t size;
 #ifndef SC_NO_CUTPASTE
@@ -1048,14 +1047,13 @@ vt_flush(struct vt_device *vd)
 		vt_mark_mouse_position_as_dirty(vd);
 #endif
 
-	vtbuf_undirty(&vw->vw_buf, &tarea, &tmask);
+	vtbuf_undirty(&vw->vw_buf, &tarea);
 	vt_termsize(vd, vf, &size);
 
 	/* Force a full redraw when the screen contents are invalid. */
 	if (vd->vd_flags & VDF_INVALID) {
 		tarea.tr_begin.tp_row = tarea.tr_begin.tp_col = 0;
 		tarea.tr_end = size;
-		tmask.vbm_row = tmask.vbm_col = VBM_DIRTY;
 
 		vd->vd_flags &= ~VDF_INVALID;
 	}
-- 
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