ref: acc58dfee42368825f7595d63240fd6e88559776
dir: /utils/cvbit/cvbit.c/
#include <u.h> #include <libc.h> #include <draw.h> #include <memdraw.h> #include <pool.h> static int invert = 0; void main(int argc, char **argv) { Memimage *im, *om; char *s; ulong ofmt; ofmt = 0; ARGBEGIN{ case 'i': invert = 1; break; case 'c': s = ARGF(); if(s==nil) break; ofmt = strtochan(s); if(ofmt == 0){ fprint(2, "cvbit: bad chan: %s\n", s); exits("chan"); } break; }ARGEND memimageinit(); im = readmemimage(0); if(im == nil){ fprint(2, "cvbit: can't read image: %r\n"); exits("read"); } if(ofmt){ om = allocmemimage(im->r, ofmt); if(om == nil){ fprint(2, "cvbit: can't allocate new image: %r\n"); exits("alloc"); } memimagedraw(om, om->r, im, im->r.min, nil, ZP, S); }else om = im; if(invert){ uchar *buf; int bpl, y, x; bpl = bytesperline(om->r, om->depth); buf = malloc(bpl); for(y=om->r.min.y; y<om->r.max.y; y++){ if(unloadmemimage(om, Rpt(Pt(om->r.min.x,y), Pt(om->r.max.x,y+1)), buf, bpl) != bpl){ fprint(2, "cvbit: can't unload image line\n"); exits("unload"); } for(x=0; x<bpl; x++) buf[x] ^= 0xFF; if(loadmemimage(om, Rpt(Pt(om->r.min.x,y), Pt(om->r.max.x,y+1)), buf, bpl) != bpl){ fprint(2, "cvbit: can't load image line\n"); exits("load"); } } } if(writememimage(1, om) < 0){ fprint(2, "cvbit: can't write image: %r\n"); exits("write"); } exits(nil); } char* poolname(Pool *p) { USED(p); return "none"; } void poolsetcompact(Pool *p, void (*f)(void*, void*)) { USED(p); USED(f); }