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	wrbitmap.c - sam - An updated version of the sam text editor.
	git clone git://vernunftzentrum.de/sam.git
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	wrbitmap.c (1439B)
	---
	1 /* Copyright (c) 1998 Lucent Technologies - All rights reserved. */
	2 #include <u.h>
	3 #include <libg.h>
	4 #include "libgint.h"
	5 #include <X11/Intrinsic.h>
	6
	7 #include <stdio.h>
	8 void
	9 wrbitmap(Bitmap b, int miny, int maxy, unsigned char data)
	10 {
	11 XImage *im;
	12 int w, h, inld, outld, l, offset, px;
	13 GC g;
	14 char *tdata;
	15
	16 w = Dx(b->r);
	17 h = maxy - miny;
	18 inld = b->ldepth;
	19 outld = (b->ldepth == 0) ? 0 : screen.ldepth;
	20 px = 1<<(3-outld); /* pixels per byte */
	21 /* set l to number of bytes of data per scan line */
	22 if(b->r.min.x >= 0)
	23 offset = b->r.min.x % px;
	24 else
	25 offset = px - b->r.min.x % px;
	26 l = (-b->r.min.x+px-1)/px;
	27 if(b->r.max.x >= 0)
	28 l += (b->r.max.x+px-1)/px;
	29 else
	30 l -= b->r.max.x/px;
	31 l *= h;
	32
	33 tdata = (char *)malloc(l);
	34 if (tdata == (char *) 0)
	35 berror("wrbitmap malloc");
	36 if (inld == outld)
	37 memcpy((void)tdata, (void)data, l);
	38 else
	39 _ldconvert((char*)data, inld, tdata, outld, w, h);
	40
	41 im = XCreateImage(_dpy, 0, 1 << outld, ZPixmap, 0, tdata, w, h, 8, 0…
	42
	43 /* Botched interface to XCreateImage doesn't let you set these: */
	44 im->bitmap_bit_order = MSBFirst;
	45 im->byte_order = MSBFirst;
	46
	47 g = _getfillgc(S, b, ~0);
	48 XSetBackground(_dpy, g, b->flag&DP1 ? 0 : _bgpixel);
	49 XPutImage(_dpy, (Drawable)b->id, g, im, offset, 0, 0, miny - b->r.mi…
	50 XDestroyImage(im);
	51 }