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1 #include "bruyn_common.h"
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2
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3 gray lookup_pattern(int pattern, int c, int r) {
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4 #define A CATEGORY_A
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5 #define B CATEGORY_B
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6
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7 gray pattern1[4][4] =
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8 {{A, A, B, B},
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9 {A, A, B, B},
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10 {B, B, A, A},
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11 {B, B, A, A}};
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12
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13 gray pattern2[8][8] =
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14 {{B, B, B, B, A, A, A, A},
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15 {B, B, B, B, A, A, A, A},
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16 {B, B, B, B, A, A, A, A},
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17 {B, B, B, B, A, A, A, A},
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18 {A, A, A, A, B, B, B, B},
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19 {A, A, A, A, B, B, B, B},
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20 {A, A, A, A, B, B, B, B},
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21 {A, A, A, A, B, B, B, B}};
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22
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23 gray pattern3[2][2] =
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24 {{A, B}, {B, A}};
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25
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26 #undef A
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27 #undef B
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28
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29 switch (pattern) {
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30 case 1:
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31 return pattern1[r % 4][c % 4];
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32 break;
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33 case 2:
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34 return pattern2[r % 8][c % 8];
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35 break;
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36 case 3:
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37 return pattern3[r % 2][c % 2];
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38 break;
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39 }
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40
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41 return CATEGORY_VOID;
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42 }
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43
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44
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