Subversion Repositories planix.SVN

#include <u.h>
#include <libc.h>
#include <draw.h>

int
cloadimage(Image *i, Rectangle r, uchar *data, int ndata)
{
        int m, nb, miny, maxy, ncblock;
        uchar *a;

        if(!rectinrect(r, i->r)){
                werrstr("cloadimage: bad rectangle");
                return -1;
        }

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