void QRcode::drawQRCode(int16_t xOffset, int16_t yOffset, String message) {
// create QR code
message.toCharArray((char *)strinbuf,260);
qrencode();
// print QR Code
for (byte x = 0; x < WD; x+=2) {
for (byte y = 0; y < WD; y++) {
if ( QRBIT(x,y) && QRBIT((x+1),y)) {
// black square on top of black square
render(x * scale + xOffset, y * scale + yOffset, foregroundColor);
render((x+1) * scale + xOffset, y * scale + yOffset, foregroundColor);
}
if (!QRBIT(x,y) && QRBIT((x+1),y)) {
// white square on top of black square
render(x * scale + xOffset, y * scale + yOffset, backgroundColor);
render((x+1) * scale + xOffset, y * scale + yOffset, foregroundColor);
}
if ( QRBIT(x,y) && !QRBIT((x+1),y)) {
// black square on top of white square
render(x * scale + xOffset, y * scale + yOffset, foregroundColor);
render((x+1) * scale + xOffset, y * scale + yOffset, backgroundColor);
}
if (!QRBIT(x,y) && !QRBIT((x+1),y)) {
// white square on top of white square
render(x * scale + xOffset, y * scale + yOffset, backgroundColor);
render((x+1) * scale + xOffset, y * scale + yOffset, backgroundColor);
}
}
Serial.println();
}
}
int main(int argc, char *argv[])
{
unsigned char x, y, v = 0, l = 1;
char *c;
unsigned width, height, j, k;
int argp = 0;
if( argc < 2 ) {
printf( "Usage:\n\nqrjpeg [-v VERS_1_40] [-l ECCLVL_1_4] \"text to encode\" >output.jpg\n" );
printf( "version defaults to auto, same as \"-v 0\"\necc level defaults to 1\n" );
return 1;
}
c = "Test Message";
while( ++argp < argc ) {
if( argv[argp][0] == '-' ) {
if( argv[argp][1] == 'v' )
v = atoi( argv[++argp]);
else if( argv[argp][1] == 'l' )
l = atoi( argv[++argp]);
else {
printf( "Usage:\n\nqrjpeg [-v VERS_1_40] [-l ECCLVL_1_4] \"text to encode\" >output.jpg\n" );
printf( "version defaults to auto, same as \"-v 0\"\necc level defaults to 1\n" );
return 1;
}
}
else
c = argv[argp];
}
if( v > 40 ) {
fprintf( stderr, "Bad version (size) parameter (should be 0 (auto) to 40)\n" );
return -1;
}
if( l < 1 || l > 4 ) {
fprintf( stderr, "Bad ECC level parameter (should be 1 to 4)\n" );
return -1;
}
if( v )
k = initecc(l, v);
else
k = initeccsize( l, strlen(c));
initframe();
strcpy((char *)strinbuf, c );
qrencode();
width = height = WD+8;
// set height and width in header
jpeg0[0x5e] = width >> 5;
jpeg0[0x5f] = width << 3;
jpeg0[0x60] = width >> 5;
jpeg0[0x61] = width << 3;
// write out header
fwrite(jpeg0, 1, sizeof(jpeg0), stdout);
// put half full scale, 3e for white, 40 for black
putchar(0x40);
for (j = 0; j < width * 4 + 3; j++)
putchar(0x80);
for (y = 0; y < WD; y++) {
k = 0;
for (x = 0; x < WD; x++) {
j = QRBIT(x, y);
if (k == j) {
putchar(0x80); // code for no change
continue;
}
putchar(j ? 0 : 0x7e); // full scale flip
k = j;
}
if (k != 0)
putchar(0x7e);
else
putchar(0x80);
for (j = 0; j < 7; j++)
putchar(0x80);
}
for (j = 0; j < width * 4 - 4; j++)
putchar(0x80);
putchar(0x80); // one last for EOF
putchar(0xFF); // end marker
putchar(0xd9);
return 0;
}
