unsigned char *Mask_mask(int width, unsigned char *frame, QRecLevel level)
{
int i;
unsigned char *mask, *bestMask;
int minDemerit = INT_MAX;
int blacks;
int bratio;
int demerit;
int w2 = width * width;
mask = (unsigned char *)malloc(w2);
if(mask == NULL) return NULL;
bestMask = NULL;
for(i=0; i<maskNum; i++) {
// n1 = n2 = n3 = n4 = 0;
demerit = 0;
blacks = maskMakers[i](width, frame, mask);
blacks += Mask_writeFormatInformation(width, mask, i, level);
bratio = (200 * blacks + w2) / w2 / 2; /* (int)(100*blacks/w2+0.5) */
demerit = (abs(bratio - 50) / 5) * N4;
// n4 = demerit;
demerit += Mask_evaluateSymbol(width, mask);
// printf("(%d,%d,%d,%d)=%d\n", n1, n2, n3 ,n4, demerit);
if(demerit < minDemerit) {
minDemerit = demerit;
free(bestMask);
bestMask = mask;
mask = (unsigned char *)malloc(w2);
if(mask == NULL) break;
}
}
free(mask);
return bestMask;
}
unsigned char *Mask_makeMask(int width, unsigned char *frame, int mask, QRecLevel level)
{
unsigned char *masked;
masked = (unsigned char *)malloc(width * width);
if(masked == NULL) return NULL;
maskMakers[mask](width, frame, masked);
Mask_writeFormatInformation(width, masked, mask, level);
return masked;
}
unsigned char *Mask_mask(int width, unsigned char *frame, QRecLevel level)
{
int i;
unsigned char *mask, *bestMask;
int minDemerit = INT_MAX;
// int bestMaskNum = 0;
int blacks;
int demerit = 0;
mask = (unsigned char *)malloc(width * width);
if(mask == NULL) return NULL;
bestMask = NULL;
for(i=0; i<8; i++) {
// n1 = n2 = n3 = n4 = 0;
// demerit = 0;
blacks = maskMakers[i](width, frame, mask);
blacks += Mask_writeFormatInformation(width, mask, i, level);
blacks = 100 * blacks / (width * width);
demerit = (abs(blacks - 50) / 5) * N4;
// n4 = demerit;
demerit += Mask_evaluateSymbol(width, mask);
// printf("(%d,%d,%d,%d)=%d\n", n1, n2, n3 ,n4, demerit);
if(demerit < minDemerit) {
minDemerit = demerit;
// bestMaskNum = i;
if(bestMask != NULL) {
free(bestMask);
}
bestMask = (unsigned char *)malloc(width * width);
if(bestMask == NULL) break;
memcpy(bestMask, mask, width * width);
}
}
free(mask);
return bestMask;
}
void test_format(void)
{
unsigned char *frame;
unsigned int format;
int width;
int i;
unsigned int decode;
int blacks, b1 = 0, b2 = 0;
testStart("Test format information(level L,mask 0)");
width = QRspec_getWidth(1);
frame = QRspec_newFrame(1);
format = QRspec_getFormatInfo(1, QR_ECLEVEL_L);
blacks = Mask_writeFormatInformation(width, frame, 1, QR_ECLEVEL_L);
decode = 0;
for(i=0; i<15; i++) {
if((1<<i) & format) b2 += 2;
}
for(i=0; i<8; i++) {
decode = decode << 1;
decode |= frame[width * 8 + i + (i > 5)] & 1;
if(decode & 1) b1++;
}
for(i=0; i<7; i++) {
decode = decode << 1;
decode |= frame[width * ((6 - i) + (i < 1)) + 8] & 1;
if(decode & 1) b1++;
}
if(decode != format) {
printf("Upper-left format information is invalid.\n");
printf("%08x, %08x\n", format, decode);
testEnd(1);
return;
}
decode = 0;
for(i=0; i<7; i++) {
decode = decode << 1;
decode |= frame[width * (width - 1 - i) + 8] & 1;
if(decode & 1) b1++;
}
for(i=0; i<8; i++) {
decode = decode << 1;
decode |= frame[width * 8 + width - 8 + i] & 1;
if(decode & 1) b1++;
}
if(decode != format) {
printf("Bottom and right format information is invalid.\n");
printf("%08x, %08x\n", format, decode);
testEnd(1);
return;
}
if(b2 != blacks || b1 != b2) {
printf("Number of dark modules is incorrect.\n");
printf("Return value: %d, dark modules in frame: %d, should be: %d\n", blacks, b1, b2);
testEnd(1);
return;
}
free(frame);
testEnd(0);
}
