cloadimage.c (933B)
1 #include <u.h> 2 #include <libc.h> 3 #include <draw.h> 4 5 int 6 cloadimage(Image *i, Rectangle r, uchar *data, int ndata) 7 { 8 int m, nb, miny, maxy, ncblock; 9 uchar *a; 10 11 if(!rectinrect(r, i->r)){ 12 werrstr("cloadimage: bad rectangle"); 13 return -1; 14 } 15 16 miny = r.min.y; 17 m = 0; 18 ncblock = _compblocksize(r, i->depth); 19 while(miny != r.max.y){ 20 maxy = atoi((char*)data+0*12); 21 nb = atoi((char*)data+1*12); 22 if(maxy<=miny || r.max.y<maxy){ 23 werrstr("creadimage: bad maxy %d", maxy); 24 return -1; 25 } 26 data += 2*12; 27 ndata -= 2*12; 28 m += 2*12; 29 if(nb<=0 || ncblock<nb || nb>ndata){ 30 werrstr("creadimage: bad count %d", nb); 31 return -1; 32 } 33 a = bufimage(i->display, 21+nb); 34 if(a == nil) 35 return -1; 36 a[0] = 'Y'; 37 BPLONG(a+1, i->id); 38 BPLONG(a+5, r.min.x); 39 BPLONG(a+9, miny); 40 BPLONG(a+13, r.max.x); 41 BPLONG(a+17, maxy); 42 memmove(a+21, data, nb); 43 miny = maxy; 44 data += nb; 45 ndata += nb; 46 m += nb; 47 } 48 return m; 49 }