59 lines
1.3 KiB
C
59 lines
1.3 KiB
C
/*
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* This file is part of the UCB release of Plan 9. It is subject to the license
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* terms in the LICENSE file found in the top-level directory of this
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* distribution and at http://akaros.cs.berkeley.edu/files/Plan9License. No
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* part of the UCB release of Plan 9, including this file, may be copied,
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* modified, propagated, or distributed except according to the terms contained
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* in the LICENSE file.
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*/
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#include <u.h>
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#include <lib9.h>
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#include <draw.h>
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int
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cloadimage(Image *i, Rectangle r, uint8_t *data, int ndata)
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{
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int m, nb, miny, maxy, ncblock;
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uint8_t *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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}
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