mirror of
https://github.com/zint/zint
synced 2024-11-16 20:57:25 +13:00
Evaluate QR codes in accordance with ISO 18004 6.8
This commit is contained in:
Benjamin Kunz
parent
d27db1f6e0
commit
2e5fe31ebf
306
backend/qr.c
306
backend/qr.c
@ -39,6 +39,7 @@
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#include "sjis.h"
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#include "qr.h"
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#include "reedsol.h"
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#include <stdlib.h> /* abs */
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int in_alpha(int glyph) {
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/* Returns true if input glyph is in the Alphanumeric set */
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@ -737,14 +738,39 @@ void populate_grid(unsigned char* grid, int size, int* datastream, int cw)
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} while (i < n);
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}
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#ifdef ZINTLOG
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int append_log(char log)
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{
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FILE *file;
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file = fopen("zintlog.txt", "a+");
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fprintf(file, "%c", log);
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fclose(file);
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return 0;
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}
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int write_log(char log[])
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{
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FILE *file;
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file = fopen("zintlog.txt", "a+");
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fprintf(file, log); /*writes*/
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fprintf(file, "\r\n"); /*writes*/
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fclose(file);
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return 0;
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}
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#endif
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int evaluate(unsigned char *grid, int size, int pattern)
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{
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int x, y, block;
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int result = 0;
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int result_b = 0;
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char state;
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int p;
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int dark_mods;
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int percentage, k;
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int percentage, k, k2;
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char str[15];
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#ifndef _MSC_VER
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char local[size * size];
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@ -752,6 +778,14 @@ int evaluate(unsigned char *grid, int size, int pattern)
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char* local = (char *)_alloca((size * size) * sizeof(char));
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#endif
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#ifdef ZINTLOG
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write_log("");
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sprintf(str, "%d", pattern);
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write_log(str);
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#endif
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// all eight bitmask variants have been encoded in the 8 bits of the bytes that make up the grid array. select them for evaluation according to the desired pattern.
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for(x = 0; x < size; x++) {
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for(y = 0; y < size; y++) {
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switch(pattern) {
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@ -767,6 +801,19 @@ int evaluate(unsigned char *grid, int size, int pattern)
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}
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}
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#ifdef ZINTLOG
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//bitmask output
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for(y = 0; y < size; y++) {
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strcpy (str, "");
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for(x = 0; x < size; x++) {
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state =local[(y * size) + x];
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append_log(state);
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}
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write_log("");
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}
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write_log("");
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#endif
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/* Test 1: Adjacent modules in row/column in same colour */
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/* Vertical */
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for(x = 0; x < size; x++) {
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@ -775,17 +822,15 @@ int evaluate(unsigned char *grid, int size, int pattern)
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for(y = 0; y < size; y++) {
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if(local[(y * size) + x] == state) {
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block++;
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if(block ==5)
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result += 3;
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if(block>5)
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result +=1;
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} else {
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if(block > 5) {
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result += (3 + block);
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}
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block=0;
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state = local[(y * size) + x];
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}
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}
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if(block > 5) {
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result += (3 + block);
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}
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}
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/* Horizontal */
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@ -795,34 +840,67 @@ int evaluate(unsigned char *grid, int size, int pattern)
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for(x = 0; x < size; x++) {
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if(local[(y * size) + x] == state) {
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block++;
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if(block ==5)
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result += 3;
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if(block>5)
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result +=1;
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} else {
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if(block > 5) {
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result += (3 + block);
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}
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block=0;
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state = local[(y * size) + x];
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}
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}
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if(block > 5) {
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result += (3 + block);
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}
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}
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/* Test 2 is not implimented */
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#ifdef ZINTLOG
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/* output Test 1 */
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sprintf(str, "%d", result);
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result_b=result;
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write_log(str);
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#endif
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/* Test 3: 1:1:3:1:1 ratio pattern in row/column */
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/* Test 2 fd02131114 */
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for(x = 0; x < size-1; x++) {
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for(y = 0; y < (size - 7) -1; y++) {
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// y + 1???
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if((local[((y + 1) * size) + x] == '1') &&
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(local[((y + 1) * size) + x+1] == '1') &&
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(local[(((y + 1)+1) * size) + x] == '1') &&
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(local[(((y + 1)+1) * size) + x+1] == '1')
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) { result += 3; }
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if((local[((y + 1) * size) + x] == '0') &&
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(local[((y + 1) * size) + x+1] == '0') &&
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(local[(((y + 1)+1) * size) + x] == '0') &&
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(local[(((y + 1)+1) * size) + x+1] == '0')
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) { result += 3; }
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}
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}
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#ifdef ZINTLOG
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/* output Test 2 */
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sprintf(str, "%d", result-result_b);
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result_b=result;
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write_log(str);
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#endif
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/* Test 3: fd02131114 */
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/*pattern 10111010000 */
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/* Vertical */
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for(x = 0; x < size; x++) {
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for(y = 0; y < (size - 7); y++) {
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for(y = 0; y < (size - 11); y++) {
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p = 0;
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if(local[(y * size) + x] == '1') { p += 0x40; }
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if(local[((y + 1) * size) + x] == '1') { p += 0x20; }
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if(local[((y + 2) * size) + x] == '1') { p += 0x10; }
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if(local[((y + 3) * size) + x] == '1') { p += 0x08; }
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if(local[((y + 4) * size) + x] == '1') { p += 0x04; }
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if(local[((y + 5) * size) + x] == '1') { p += 0x02; }
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if(local[((y + 6) * size) + x] == '1') { p += 0x01; }
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if(p == 0x5d) {
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if(local[(y * size) + x] == '1') { p += 1; }
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if(local[((y + 1) * size) + x] == '0') { p += 1; }
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if(local[((y + 2) * size) + x] == '1') { p += 1; }
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if(local[((y + 3) * size) + x] == '1') { p += 1; }
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if(local[((y + 4) * size) + x] == '1') { p += 1; }
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if(local[((y + 5) * size) + x] == '0') { p += 1; }
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if(local[((y + 6) * size) + x] == '1') { p += 1; }
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if(local[((y + 7) * size) + x] == '0') { p += 1; }
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if(local[((y + 8) * size) + x] == '0') { p += 1; }
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if(local[((y + 9) * size) + x] == '0') { p += 1; }
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if(local[((y + 10) * size) + x] == '0') { p += 1; }
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if(p == 11) {
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result += 40;
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}
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}
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@ -830,21 +908,75 @@ int evaluate(unsigned char *grid, int size, int pattern)
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/* Horizontal */
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for(y = 0; y < size; y++) {
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for(x = 0; x < (size - 7); x++) {
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for(x = 0; x < (size - 11); x++) {
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p = 0;
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if(local[(y * size) + x] == '1') { p += 0x40; }
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if(local[(y * size) + x + 1] == '1') { p += 0x20; }
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if(local[(y * size) + x + 2] == '1') { p += 0x10; }
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if(local[(y * size) + x + 3] == '1') { p += 0x08; }
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if(local[(y * size) + x + 4] == '1') { p += 0x04; }
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if(local[(y * size) + x + 5] == '1') { p += 0x02; }
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if(local[(y * size) + x + 6] == '1') { p += 0x01; }
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if(p == 0x5d) {
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if(local[(y * size) + x] == '1') { p += 1; }
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if(local[(y * size) + x + 1] == '0') { p += 1; }
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if(local[(y * size) + x + 2] == '1') { p += 1; }
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if(local[(y * size) + x + 3] == '1') { p += 1; }
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if(local[(y * size) + x + 4] == '1') { p += 1; }
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if(local[(y * size) + x + 5] == '0') { p += 1; }
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if(local[(y * size) + x + 6] == '1') { p += 1; }
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if(local[(y * size) + x + 7] == '0') { p += 1; }
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if(local[(y * size) + x + 8] == '0') { p += 1; }
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if(local[(y * size) + x + 9] == '0') { p += 1; }
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if(local[(y * size) + x + 10] == '0') { p += 1; }
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if(p == 11) {
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result += 40;
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}
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}
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}
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/*pattern 00001011101 */
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/* Vertical */
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for(x = 0; x < size; x++) {
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for(y = 0; y < (size - 11); y++) {
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p = 0;
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if(local[(y * size) + x] == '0') { p += 1; }
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if(local[((y + 1) * size) + x] == '0') { p += 1; }
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if(local[((y + 2) * size) + x] == '0') { p += 1; }
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if(local[((y + 3) * size) + x] == '0') { p += 1; }
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if(local[((y + 4) * size) + x] == '1') { p += 1; }
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if(local[((y + 5) * size) + x] == '0') { p += 1; }
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if(local[((y + 6) * size) + x] == '1') { p += 1; }
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if(local[((y + 7) * size) + x] == '1') { p += 1; }
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if(local[((y + 8) * size) + x] == '1') { p += 1; }
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if(local[((y + 9) * size) + x] == '0') { p += 1; }
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if(local[((y + 10) * size) + x] == '1') { p += 1; }
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if(p == 11) {
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result += 40;
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}
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}
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}
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/* Horizontal */
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for(y = 0; y < size; y++) {
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for(x = 0; x < (size - 11); x++) {
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p = 0;
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if(local[(y * size) + x] == '0') { p += 1; }
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if(local[(y * size) + x + 1] == '0') { p += 1; }
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if(local[(y * size) + x + 2] == '0') { p += 1; }
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if(local[(y * size) + x + 3] == '0') { p += 1; }
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if(local[(y * size) + x + 4] == '1') { p += 1; }
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if(local[(y * size) + x + 5] == '0') { p += 1; }
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if(local[(y * size) + x + 6] == '1') { p += 1; }
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if(local[(y * size) + x + 7] == '1') { p += 1; }
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if(local[(y * size) + x + 8] == '1') { p += 1; }
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if(local[(y * size) + x + 9] == '0') { p += 1; }
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if(local[(y * size) + x + 10] == '1') { p += 1; }
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if(p == 11) {
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result += 40;
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}
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}
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}
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#ifdef ZINTLOG
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/* output Test 3 */
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sprintf(str, "%d", result-result_b);
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result_b=result;
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write_log(str);
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#endif
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/* Test 4: Proportion of dark modules in entire symbol */
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dark_mods = 0;
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for(x = 0; x < size; x++) {
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@ -855,19 +987,72 @@ int evaluate(unsigned char *grid, int size, int pattern)
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}
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}
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percentage = 100 * (dark_mods / (size * size));
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if(percentage <= 50) {
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k = ((100 - percentage) - 50) / 5;
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} else {
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k = (percentage - 50) / 5;
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int m=0;
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for(x = 0; x < 100; x+=5) {
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if(x<percentage)
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m=x;
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}
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result += 10 * k;
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k=abs((m-50)/5);
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k2=abs((m+5-50)/5);
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int smallest=k;
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if(k2<smallest)
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smallest=k2;
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result += 10 * smallest;
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#ifdef ZINTLOG
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/* output Test 4+summary */
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sprintf(str, "%d", result-result_b);
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write_log(str);
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write_log("==========");
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sprintf(str, "%d", result);
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write_log(str);
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#endif
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return result;
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}
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void add_format_info_eval(unsigned char *eval, int size, int ecc_level, int pattern)
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{
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/* Add format information to grid */
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int apply_bitmask(unsigned char *grid, int size)
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int format = pattern;
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unsigned int seq;
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int i;
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switch(ecc_level) {
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case LEVEL_L: format += 0x08; break;
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case LEVEL_Q: format += 0x18; break;
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case LEVEL_H: format += 0x10; break;
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}
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seq = qr_annex_c[format];
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for(i = 0; i < 6; i++) {
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eval[(i * size) + 8] = (seq >> i) & 0x01 ? (0x01 >> pattern) : 0x00;
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}
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for(i = 0; i < 8; i++) {
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eval[(8 * size) + (size - i - 1)] = (seq >> i) & 0x01 ? (0x01 >> pattern) : 0x00;
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}
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for(i = 0; i < 6; i++) {
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eval[(8 * size) + (5 - i)] = (seq >> (i + 9)) & 0x01 ? (0x01 >> pattern) : 0x00;
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}
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for(i = 0; i < 7; i++) {
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eval[(((size - 7) + i) * size) + 8] = (seq >> (i + 8)) & 0x01 ? (0x01 >> pattern) : 0x00;
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}
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eval[(7 * size) + 8] = (seq >> 6) & 0x01 ? (0x01 >> pattern) : 0x00;
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eval[(8 * size) + 8] = (seq >> 7) & 0x01 ? (0x01 >> pattern) : 0x00;
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eval[(8 * size) + 7] = (seq >> 8) & 0x01 ? (0x01 >> pattern) : 0x00;
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}
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int apply_bitmask(unsigned char *grid, int size, int ecc_level)
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{
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int x, y;
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unsigned char p;
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@ -888,7 +1073,8 @@ int apply_bitmask(unsigned char *grid, int size)
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for(y = 0; y < size; y++) {
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mask[(y * size) + x] = 0x00;
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if (!(grid[(y * size) + x] & 0xf0)) {
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// all eight bitmask variants are encoded in the 8 bits of the bytes that make up the mask array.
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if (!(grid[(y * size) + x] & 0xf0)) { // exclude areas not to be masked.
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if(((y + x) & 1) == 0) { mask[(y * size) + x] += 0x01; }
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if((y & 1) == 0) { mask[(y * size) + x] += 0x02; }
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if((x % 3) == 0) { mask[(y * size) + x] += 0x04; }
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@ -901,9 +1087,12 @@ int apply_bitmask(unsigned char *grid, int size)
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}
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}
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// apply data masks to grid, result in eval
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for(x = 0; x < size; x++) {
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for(y = 0; y < size; y++) {
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if(grid[(y * size) + x] & 0x01) { p = 0xff; } else { p = 0x00; }
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if(grid[(y * size) + x] & 0x01)
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{ p = 0xff; }
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else { p = 0x00; }
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eval[(y * size) + x] = mask[(y * size) + x] ^ p;
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}
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@ -912,6 +1101,9 @@ int apply_bitmask(unsigned char *grid, int size)
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/* Evaluate result */
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for(pattern = 0; pattern < 8; pattern++) {
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add_format_info_eval(eval, size, ecc_level, pattern);
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penalty[pattern] = evaluate(eval, size, pattern);
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}
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@ -924,6 +1116,13 @@ int apply_bitmask(unsigned char *grid, int size)
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}
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}
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#ifdef ZINTLOG
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char str[15];
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sprintf(str, "%d", best_val);
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write_log("choosed pattern:");
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write_log(str);
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#endif
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/* Apply mask */
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for(x = 0; x < size; x++) {
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for(y = 0; y < size; y++) {
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@ -995,12 +1194,12 @@ void add_version_info(unsigned char *grid, int size, int version)
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long int version_data = qr_annex_d[version - 7];
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for(i = 0; i < 6; i++) {
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grid[((size - 11) * size) + i] += (version_data >> (i * 3)) & 0x01;
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grid[((size - 10) * size) + i] += (version_data >> ((i * 3) + 1)) & 0x01;
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grid[((size - 9) * size) + i] += (version_data >> ((i * 3) + 2)) & 0x01;
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grid[(i * size) + (size - 11)] += (version_data >> (i * 3)) & 0x01;
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grid[(i * size) + (size - 10)] += (version_data >> ((i * 3) + 1)) & 0x01;
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grid[(i * size) + (size - 9)] += (version_data >> ((i * 3) + 2)) & 0x01;
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grid[((size - 11) * size) + i] += (version_data >> (i * 3)) & 0x41;
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grid[((size - 10) * size) + i] += (version_data >> ((i * 3) + 1)) & 0x41;
|
||||
grid[((size - 9) * size) + i] += (version_data >> ((i * 3) + 2)) & 0x41;
|
||||
grid[(i * size) + (size - 11)] += (version_data >> (i * 3)) & 0x41;
|
||||
grid[(i * size) + (size - 10)] += (version_data >> ((i * 3) + 1)) & 0x41;
|
||||
grid[(i * size) + (size - 9)] += (version_data >> ((i * 3) + 2)) & 0x41;
|
||||
}
|
||||
}
|
||||
|
||||
@ -1148,12 +1347,17 @@ int qr_code(struct zint_symbol *symbol, unsigned char source[], int length)
|
||||
|
||||
setup_grid(grid, size, version);
|
||||
populate_grid(grid, size, fullstream, qr_total_codewords[version - 1]);
|
||||
bitmask = apply_bitmask(grid, size);
|
||||
add_format_info(grid, size, ecc_level, bitmask);
|
||||
|
||||
if(version >= 7) {
|
||||
add_version_info(grid, size, version);
|
||||
}
|
||||
|
||||
bitmask = apply_bitmask(grid, size, ecc_level);
|
||||
|
||||
add_format_info(grid, size, ecc_level, bitmask);
|
||||
|
||||
|
||||
|
||||
symbol->width = size;
|
||||
symbol->rows = size;
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user