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notcurses/src/demo/qrcode.c

40 lines
1.2 KiB
C

#include "demo.h"
int qrcode_demo(struct notcurses* nc, uint64_t startns){
(void)startns;
if(!notcurses_canutf8(nc)){
return 0;
}
#ifdef USE_QRCODEGEN
char data[128];
unsigned dimy, dimx;
struct ncplane *stdn = notcurses_stddim_yx(nc, &dimy, &dimx);
ncplane_erase(stdn);
struct ncplane* n = ncplane_dup(stdn, NULL);
for(int i = 0 ; i < 1024 ; ++i){
ncplane_erase(n);
size_t len = rand() % sizeof(data) + 1;
size_t done = 0;
// done this tedious way because getrand() doesn't exist on freebsd 11
while(done < len){
long r = rand();
memcpy(data + done, &r, sizeof(r));
done += sizeof(r);
}
ncplane_home(n);
unsigned y = dimy, x = dimx;
ncplane_home(n);
int qlen = ncplane_qrcode(n, &y, &x, data, len);
if(qlen > 0){ // FIXME can fail due to being too large for display; distinguish this case
ncplane_move_yx(n, (dimy - y) / 2, (dimx - x) / 2);
ncplane_home(n);
ncplane_set_fg_rgb8(n, rand() % 255 + 1, rand() % 255 + 1, rand() % 255 + 1);
DEMO_RENDER(nc);
}
}
ncplane_mergedown_simple(n, stdn); // leave the last one on-screen
ncplane_destroy(n);
#endif
return 0;
}