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WebSVN – planix.SVN – Blame – /os/branches/feature_fixcpp/sys/src/libdraw/cloadimage.c – Rev 2

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#include <u.h>
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#include <libc.h>
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#include <draw.h>
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int
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cloadimage(Image *i, Rectangle r, uchar *data, int ndata)
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{
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	int m, nb, miny, maxy, ncblock;
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	uchar *a;
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	if(!rectinrect(r, i->r)){
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		werrstr("cloadimage: bad rectangle");
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		return -1;
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	}
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	miny = r.min.y;
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	m = 0;
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	ncblock = _compblocksize(r, i->depth);
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	while(miny != r.max.y){
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		maxy = atoi((char*)data+0*12);
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		nb = atoi((char*)data+1*12);
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		if(maxy<=miny || r.max.y<maxy){
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			werrstr("creadimage: bad maxy %d", maxy);
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			return -1;
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		}
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		data += 2*12;
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		ndata -= 2*12;
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		m += 2*12;
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		if(nb<=0 || ncblock<nb || nb>ndata){
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			werrstr("creadimage: bad count %d", nb);
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			return -1;
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		}
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		a = bufimage(i->display, 21+nb);
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		if(a == nil)
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			return -1;
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		a[0] = 'Y';
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		BPLONG(a+1, i->id);
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		BPLONG(a+5, r.min.x);
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		BPLONG(a+9, miny);
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		BPLONG(a+13, r.max.x);
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		BPLONG(a+17, maxy);
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		memmove(a+21, data, nb);
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		miny = maxy;
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		data += nb;
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		ndata += nb;
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		m += nb;
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	}
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	return m;
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}