From 4a1965d81c140561d9970574e7e6bb04ae1f8d9a Mon Sep 17 00:00:00 2001
From: David du Colombier <0intro@gmail.com>
Date: Mon, 1 Jul 1991 00:00:00 +0000
Subject: [PATCH] Plan 9 from Bell Labs 1991-07-01

---
 port/devbit.c | 63 ++++-----------------------------------------------
 1 file changed, 4 insertions(+), 59 deletions(-)

diff --git a/port/devbit.c b/port/devbit.c
index 42f1c986baf960d4741d206ff4199c9b8cecf181..e5014161ca7d62277be3508433f7419a6dea6fc6 100644
--- a/port/devbit.c
+++ b/port/devbit.c
@@ -886,66 +886,11 @@ bitwrite(Chan *c, void *va, long n, ulong offset)
 			if(v<0 || v>=conf.nbitmap || src->ldepth<0)
 				error(Ebadbitmap);
 			v = GSHORT(p+21);
-			x = src->r.min.x;
-			y = src->r.min.y;
-			tw = src->r.max.x - x;
-			th = src->r.max.y - y;
-			if(x==0 && y==0 && 16%tw == 0 && 16%th == 0){
-				GTexture t;
-
-				if(tw==16 && th==16)
-					for(y=0; y<16; y++)
-						t.bits[y] = src->base[y]>>16;
-				else
-					for(y=0; y<16; y++){
-						l = src->base[y%th] >> (32-tw);
-						for(i=16/tw, ws=l; i > 1; i--)
-							ws = (ws<<tw) | l;
-						t.bits[y] = ws;
-					}
-				if(off && !isoff){
-					cursoroff(1);
-					isoff = 1;
-				}
-				gtexture(dst, rect, &t, v);
-			}else{
-				GBitmap d;
-
-				d = *dst;
-				rect = rcanon(rect);
-				if(rectclip(&d.r, rect)==0)
-					return;
-				/*
-				 * Find x, maxx such that
-				 * x <= rect.min.x < x+tw,
-				 * maxx-tw < rect.max.x <= maxx
-				 * and x, maxx are integral multiples of tw
-				 * away from src->r.min.x
-				 * Similarly for y, maxy
-				 */
-				if(x > rect.min.x)
-					x -= ((x-rect.min.x+tw-1)/tw)*tw;
-				else if(x+tw <= rect.min.x)
-					x += ((rect.min.x-x)/tw)*tw;
-				if(y > rect.min.y)
-					y -= ((y-rect.min.y+th-1)/th)*th;
-				else if(y+tw <= rect.min.y)
-					y += ((rect.min.y-y)/th)*th;
-				maxx = x+tw;
-				if(maxx < rect.max.x)
-					maxx += ((rect.max.x-maxx+tw-1)/tw)*tw;
-				maxy = y+th;
-				if(maxy < rect.max.y)
-					maxy += ((rect.max.y-maxy+th-1)/th)*th;
-				minx = x;
-				if(off && !isoff){
-					cursoroff(1);
-					isoff = 1;
-				}
-				for( ; y<maxy; y+=th)
-					for(x=minx; x<maxx; x+=tw)
-						gbitblt(&d, Pt(x,y), src, src->r, v);
+			if(off && !isoff){
+				cursoroff(1);
+				isoff = 1;
 			}
+			gtexture(dst, rect, src, v);
 			m -= 23;
 			p += 23;
 			break;