#include "lib9.h"#include "draw.h"#include "memdraw.h" int_loadmemimage(Memimage *i, Rectangle r, uchar *data, int ndata){ int y, l, lpart, rpart, mx, m, mr; uchar *q; if(!rectinrect(r, i->r)) return -1; l = bytesperline(r, i->depth); if(ndata < l*Dy(r)) return -1; ndata = l*Dy(r); q = byteaddr(i, r.min); mx = 7/i->depth; lpart = (r.min.x & mx) * i->depth; rpart = (r.max.x & mx) * i->depth; m = 0xFF >> lpart; /* may need to do bit insertion on edges */ if(l == 1){ /* all in one byte */ if(rpart) m ^= 0xFF >> rpart; for(y=r.min.y; y<r.max.y; y++){ *q ^= (*data^*q) & m; q += i->width*sizeof(ulong); data++; } return ndata; } if(lpart==0 && rpart==0){ /* easy case */ for(y=r.min.y; y<r.max.y; y++){ memmove(q, data, l); q += i->width*sizeof(ulong); data += l; } return ndata; } mr = 0xFF ^ (0xFF >> rpart); if(lpart!=0 && rpart==0){ for(y=r.min.y; y<r.max.y; y++){ *q ^= (*data^*q) & m; if(l > 1) memmove(q+1, data+1, l-1); q += i->width*sizeof(ulong); data += l; } return ndata; } if(lpart==0 && rpart!=0){ for(y=r.min.y; y<r.max.y; y++){ if(l > 1) memmove(q, data, l-1); q[l-1] ^= (data[l-1]^q[l-1]) & mr; q += i->width*sizeof(ulong); data += l; } return ndata; } for(y=r.min.y; y<r.max.y; y++){ *q ^= (*data^*q) & m; if(l > 2) memmove(q+1, data+1, l-2); q[l-1] ^= (data[l-1]^q[l-1]) & mr; q += i->width*sizeof(ulong); data += l; } return ndata;}
#include "lib9.h"
#include "draw.h"
#include "memdraw.h"
int
_loadmemimage(Memimage *i, Rectangle r, uchar *data, int ndata)
{
int y, l, lpart, rpart, mx, m, mr;
uchar *q;
if(!rectinrect(r, i->r))
return -1;
l = bytesperline(r, i->depth);
if(ndata < l*Dy(r))
return -1;
ndata = l*Dy(r);
q = byteaddr(i, r.min);
mx = 7/i->depth;
lpart = (r.min.x & mx) * i->depth;
rpart = (r.max.x & mx) * i->depth;
m = 0xFF >> lpart;
/* may need to do bit insertion on edges */
if(l == 1){ /* all in one byte */
if(rpart)
m ^= 0xFF >> rpart;
for(y=r.min.y; y<r.max.y; y++){
*q ^= (*data^*q) & m;
q += i->width*sizeof(ulong);
data++;
}
return ndata;
}
if(lpart==0 && rpart==0){ /* easy case */
for(y=r.min.y; y<r.max.y; y++){
memmove(q, data, l);
q += i->width*sizeof(ulong);
data += l;
}
return ndata;
}
mr = 0xFF ^ (0xFF >> rpart);
if(lpart!=0 && rpart==0){
for(y=r.min.y; y<r.max.y; y++){
*q ^= (*data^*q) & m;
if(l > 1)
memmove(q+1, data+1, l-1);
q += i->width*sizeof(ulong);
data += l;
}
return ndata;
}
if(lpart==0 && rpart!=0){
for(y=r.min.y; y<r.max.y; y++){
if(l > 1)
memmove(q, data, l-1);
q[l-1] ^= (data[l-1]^q[l-1]) & mr;
q += i->width*sizeof(ulong);
data += l;
}
return ndata;
}
for(y=r.min.y; y<r.max.y; y++){
*q ^= (*data^*q) & m;
if(l > 2)
memmove(q+1, data+1, l-2);
q[l-1] ^= (data[l-1]^q[l-1]) & mr;
q += i->width*sizeof(ulong);
data += l;
}
return ndata;
}