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@@ -10,6 +10,7 @@
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// You can turn on dithering and "high quality" using mode.
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//
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// version history:
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+// v1.12 - (ryg) fix bug in single-color table generator
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// v1.11 - (ryg) avoid racy global init, better single-color tables, remove dither
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// v1.10 - (i.c) various small quality improvements
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// v1.09 - (stb) update documentation re: surprising alpha channel requirement
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@@ -92,72 +93,72 @@ STBDDEF void stb_compress_bc5_block(unsigned char *dest, const unsigned char *sr
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#endif
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static const unsigned char stb__OMatch5[256][2] = {
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- { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 1, 1 }, { 1, 1 }, { 1, 1 },
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- { 1, 1 }, { 1, 1 }, { 1, 1 }, { 1, 1 }, { 1, 1 }, { 2, 2 }, { 2, 2 }, { 2, 2 },
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- { 2, 2 }, { 2, 2 }, { 2, 2 }, { 2, 2 }, { 2, 2 }, { 3, 3 }, { 3, 3 }, { 3, 3 },
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- { 3, 3 }, { 3, 3 }, { 3, 3 }, { 3, 3 }, { 3, 3 }, { 4, 4 }, { 4, 4 }, { 4, 4 },
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- { 4, 4 }, { 4, 4 }, { 4, 4 }, { 4, 4 }, { 4, 4 }, { 4, 4 }, { 5, 5 }, { 5, 5 },
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- { 5, 5 }, { 5, 5 }, { 5, 5 }, { 5, 5 }, { 5, 5 }, { 5, 5 }, { 6, 6 }, { 6, 6 },
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- { 6, 6 }, { 6, 6 }, { 6, 6 }, { 6, 6 }, { 6, 6 }, { 6, 6 }, { 7, 7 }, { 7, 7 },
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- { 7, 7 }, { 7, 7 }, { 7, 7 }, { 7, 7 }, { 7, 7 }, { 7, 7 }, { 8, 8 }, { 8, 8 },
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- { 8, 8 }, { 8, 8 }, { 8, 8 }, { 8, 8 }, { 8, 8 }, { 8, 8 }, { 8, 8 }, { 9, 9 },
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- { 9, 9 }, { 9, 9 }, { 9, 9 }, { 9, 9 }, { 9, 9 }, { 9, 9 }, { 9, 9 }, { 10, 10 },
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- { 10, 10 }, { 10, 10 }, { 10, 10 }, { 10, 10 }, { 10, 10 }, { 10, 10 }, { 10, 10 }, { 11, 11 },
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- { 11, 11 }, { 11, 11 }, { 11, 11 }, { 11, 11 }, { 11, 11 }, { 11, 11 }, { 11, 11 }, { 12, 12 },
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- { 12, 12 }, { 12, 12 }, { 12, 12 }, { 12, 12 }, { 12, 12 }, { 12, 12 }, { 12, 12 }, { 12, 12 },
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- { 13, 13 }, { 13, 13 }, { 13, 13 }, { 13, 13 }, { 13, 13 }, { 13, 13 }, { 13, 13 }, { 13, 13 },
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- { 14, 14 }, { 14, 14 }, { 14, 14 }, { 14, 14 }, { 14, 14 }, { 14, 14 }, { 14, 14 }, { 14, 14 },
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- { 15, 15 }, { 15, 15 }, { 15, 15 }, { 15, 15 }, { 15, 15 }, { 15, 15 }, { 15, 15 }, { 15, 15 },
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- { 16, 16 }, { 16, 16 }, { 16, 16 }, { 16, 16 }, { 16, 16 }, { 16, 16 }, { 16, 16 }, { 16, 16 },
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- { 16, 16 }, { 17, 17 }, { 17, 17 }, { 17, 17 }, { 17, 17 }, { 17, 17 }, { 17, 17 }, { 17, 17 },
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- { 17, 17 }, { 18, 18 }, { 18, 18 }, { 18, 18 }, { 18, 18 }, { 18, 18 }, { 18, 18 }, { 18, 18 },
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- { 18, 18 }, { 19, 19 }, { 19, 19 }, { 19, 19 }, { 19, 19 }, { 19, 19 }, { 19, 19 }, { 19, 19 },
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- { 19, 19 }, { 20, 20 }, { 20, 20 }, { 20, 20 }, { 20, 20 }, { 20, 20 }, { 20, 20 }, { 20, 20 },
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- { 20, 20 }, { 20, 20 }, { 21, 21 }, { 21, 21 }, { 21, 21 }, { 21, 21 }, { 21, 21 }, { 21, 21 },
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- { 21, 21 }, { 21, 21 }, { 22, 22 }, { 22, 22 }, { 22, 22 }, { 22, 22 }, { 22, 22 }, { 22, 22 },
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- { 22, 22 }, { 22, 22 }, { 23, 23 }, { 23, 23 }, { 23, 23 }, { 23, 23 }, { 23, 23 }, { 23, 23 },
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- { 23, 23 }, { 23, 23 }, { 24, 24 }, { 24, 24 }, { 24, 24 }, { 24, 24 }, { 24, 24 }, { 24, 24 },
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- { 24, 24 }, { 24, 24 }, { 24, 24 }, { 25, 25 }, { 25, 25 }, { 25, 25 }, { 25, 25 }, { 25, 25 },
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- { 25, 25 }, { 25, 25 }, { 25, 25 }, { 26, 26 }, { 26, 26 }, { 26, 26 }, { 26, 26 }, { 26, 26 },
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- { 26, 26 }, { 26, 26 }, { 26, 26 }, { 27, 27 }, { 27, 27 }, { 27, 27 }, { 27, 27 }, { 27, 27 },
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- { 27, 27 }, { 27, 27 }, { 27, 27 }, { 28, 28 }, { 28, 28 }, { 28, 28 }, { 28, 28 }, { 28, 28 },
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- { 28, 28 }, { 28, 28 }, { 28, 28 }, { 28, 28 }, { 29, 29 }, { 29, 29 }, { 29, 29 }, { 29, 29 },
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- { 29, 29 }, { 29, 29 }, { 29, 29 }, { 29, 29 }, { 30, 30 }, { 30, 30 }, { 30, 30 }, { 30, 30 },
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- { 30, 30 }, { 30, 30 }, { 30, 30 }, { 30, 30 }, { 31, 31 }, { 31, 31 }, { 31, 31 }, { 31, 31 },
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+ { 0, 0 }, { 0, 0 }, { 0, 1 }, { 0, 1 }, { 1, 0 }, { 1, 0 }, { 1, 0 }, { 1, 1 },
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+ { 1, 1 }, { 1, 1 }, { 1, 2 }, { 0, 4 }, { 2, 1 }, { 2, 1 }, { 2, 1 }, { 2, 2 },
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+ { 2, 2 }, { 2, 2 }, { 2, 3 }, { 1, 5 }, { 3, 2 }, { 3, 2 }, { 4, 0 }, { 3, 3 },
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+ { 3, 3 }, { 3, 3 }, { 3, 4 }, { 3, 4 }, { 3, 4 }, { 3, 5 }, { 4, 3 }, { 4, 3 },
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+ { 5, 2 }, { 4, 4 }, { 4, 4 }, { 4, 5 }, { 4, 5 }, { 5, 4 }, { 5, 4 }, { 5, 4 },
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+ { 6, 3 }, { 5, 5 }, { 5, 5 }, { 5, 6 }, { 4, 8 }, { 6, 5 }, { 6, 5 }, { 6, 5 },
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+ { 6, 6 }, { 6, 6 }, { 6, 6 }, { 6, 7 }, { 5, 9 }, { 7, 6 }, { 7, 6 }, { 8, 4 },
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+ { 7, 7 }, { 7, 7 }, { 7, 7 }, { 7, 8 }, { 7, 8 }, { 7, 8 }, { 7, 9 }, { 8, 7 },
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+ { 8, 7 }, { 9, 6 }, { 8, 8 }, { 8, 8 }, { 8, 9 }, { 8, 9 }, { 9, 8 }, { 9, 8 },
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+ { 9, 8 }, { 10, 7 }, { 9, 9 }, { 9, 9 }, { 9, 10 }, { 8, 12 }, { 10, 9 }, { 10, 9 },
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+ { 10, 9 }, { 10, 10 }, { 10, 10 }, { 10, 10 }, { 10, 11 }, { 9, 13 }, { 11, 10 }, { 11, 10 },
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+ { 12, 8 }, { 11, 11 }, { 11, 11 }, { 11, 11 }, { 11, 12 }, { 11, 12 }, { 11, 12 }, { 11, 13 },
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+ { 12, 11 }, { 12, 11 }, { 13, 10 }, { 12, 12 }, { 12, 12 }, { 12, 13 }, { 12, 13 }, { 13, 12 },
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+ { 13, 12 }, { 13, 12 }, { 14, 11 }, { 13, 13 }, { 13, 13 }, { 13, 14 }, { 12, 16 }, { 14, 13 },
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+ { 14, 13 }, { 14, 13 }, { 14, 14 }, { 14, 14 }, { 14, 14 }, { 14, 15 }, { 13, 17 }, { 15, 14 },
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+ { 15, 14 }, { 16, 12 }, { 15, 15 }, { 15, 15 }, { 15, 15 }, { 15, 16 }, { 15, 16 }, { 15, 16 },
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+ { 15, 17 }, { 16, 15 }, { 16, 15 }, { 17, 14 }, { 16, 16 }, { 16, 16 }, { 16, 17 }, { 16, 17 },
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+ { 17, 16 }, { 17, 16 }, { 17, 16 }, { 18, 15 }, { 17, 17 }, { 17, 17 }, { 17, 18 }, { 16, 20 },
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+ { 18, 17 }, { 18, 17 }, { 18, 17 }, { 18, 18 }, { 18, 18 }, { 18, 18 }, { 18, 19 }, { 17, 21 },
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+ { 19, 18 }, { 19, 18 }, { 20, 16 }, { 19, 19 }, { 19, 19 }, { 19, 19 }, { 19, 20 }, { 19, 20 },
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+ { 19, 20 }, { 19, 21 }, { 20, 19 }, { 20, 19 }, { 21, 18 }, { 20, 20 }, { 20, 20 }, { 20, 21 },
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+ { 20, 21 }, { 21, 20 }, { 21, 20 }, { 21, 20 }, { 22, 19 }, { 21, 21 }, { 21, 21 }, { 21, 22 },
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+ { 20, 24 }, { 22, 21 }, { 22, 21 }, { 22, 21 }, { 22, 22 }, { 22, 22 }, { 22, 22 }, { 22, 23 },
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+ { 21, 25 }, { 23, 22 }, { 23, 22 }, { 24, 20 }, { 23, 23 }, { 23, 23 }, { 23, 23 }, { 23, 24 },
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+ { 23, 24 }, { 23, 24 }, { 23, 25 }, { 24, 23 }, { 24, 23 }, { 25, 22 }, { 24, 24 }, { 24, 24 },
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+ { 24, 25 }, { 24, 25 }, { 25, 24 }, { 25, 24 }, { 25, 24 }, { 26, 23 }, { 25, 25 }, { 25, 25 },
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+ { 25, 26 }, { 24, 28 }, { 26, 25 }, { 26, 25 }, { 26, 25 }, { 26, 26 }, { 26, 26 }, { 26, 26 },
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+ { 26, 27 }, { 25, 29 }, { 27, 26 }, { 27, 26 }, { 28, 24 }, { 27, 27 }, { 27, 27 }, { 27, 27 },
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+ { 27, 28 }, { 27, 28 }, { 27, 28 }, { 27, 29 }, { 28, 27 }, { 28, 27 }, { 29, 26 }, { 28, 28 },
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+ { 28, 28 }, { 28, 29 }, { 28, 29 }, { 29, 28 }, { 29, 28 }, { 29, 28 }, { 30, 27 }, { 29, 29 },
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+ { 29, 29 }, { 29, 30 }, { 29, 30 }, { 30, 29 }, { 30, 29 }, { 30, 29 }, { 30, 30 }, { 30, 30 },
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+ { 30, 30 }, { 30, 31 }, { 30, 31 }, { 31, 30 }, { 31, 30 }, { 31, 30 }, { 31, 31 }, { 31, 31 },
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};
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static const unsigned char stb__OMatch6[256][2] = {
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- { 0, 0 }, { 0, 0 }, { 0, 0 }, { 1, 1 }, { 1, 1 }, { 1, 1 }, { 1, 1 }, { 2, 2 },
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- { 2, 2 }, { 2, 2 }, { 2, 2 }, { 3, 3 }, { 3, 3 }, { 3, 3 }, { 3, 3 }, { 4, 4 },
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- { 4, 4 }, { 4, 4 }, { 4, 4 }, { 5, 5 }, { 5, 5 }, { 5, 5 }, { 5, 5 }, { 6, 6 },
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- { 6, 6 }, { 6, 6 }, { 6, 6 }, { 7, 7 }, { 7, 7 }, { 7, 7 }, { 7, 7 }, { 8, 8 },
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- { 8, 8 }, { 8, 8 }, { 8, 8 }, { 9, 9 }, { 9, 9 }, { 9, 9 }, { 9, 9 }, { 10, 10 },
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- { 10, 10 }, { 10, 10 }, { 10, 10 }, { 11, 11 }, { 11, 11 }, { 11, 11 }, { 11, 11 }, { 12, 12 },
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- { 12, 12 }, { 12, 12 }, { 12, 12 }, { 13, 13 }, { 13, 13 }, { 13, 13 }, { 13, 13 }, { 14, 14 },
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- { 14, 14 }, { 14, 14 }, { 14, 14 }, { 15, 15 }, { 15, 15 }, { 15, 15 }, { 15, 15 }, { 16, 16 },
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- { 16, 16 }, { 16, 16 }, { 16, 16 }, { 16, 16 }, { 17, 17 }, { 17, 17 }, { 17, 17 }, { 17, 17 },
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- { 18, 18 }, { 18, 18 }, { 18, 18 }, { 18, 18 }, { 19, 19 }, { 19, 19 }, { 19, 19 }, { 19, 19 },
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- { 20, 20 }, { 20, 20 }, { 20, 20 }, { 20, 20 }, { 21, 21 }, { 21, 21 }, { 21, 21 }, { 21, 21 },
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- { 22, 22 }, { 22, 22 }, { 22, 22 }, { 22, 22 }, { 23, 23 }, { 23, 23 }, { 23, 23 }, { 23, 23 },
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- { 24, 24 }, { 24, 24 }, { 24, 24 }, { 24, 24 }, { 25, 25 }, { 25, 25 }, { 25, 25 }, { 25, 25 },
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- { 26, 26 }, { 26, 26 }, { 26, 26 }, { 26, 26 }, { 27, 27 }, { 27, 27 }, { 27, 27 }, { 27, 27 },
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- { 28, 28 }, { 28, 28 }, { 28, 28 }, { 28, 28 }, { 29, 29 }, { 29, 29 }, { 29, 29 }, { 29, 29 },
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- { 30, 30 }, { 30, 30 }, { 30, 30 }, { 30, 30 }, { 31, 31 }, { 31, 31 }, { 31, 31 }, { 31, 31 },
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- { 32, 32 }, { 32, 32 }, { 32, 32 }, { 32, 32 }, { 32, 32 }, { 33, 33 }, { 33, 33 }, { 33, 33 },
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- { 33, 33 }, { 34, 34 }, { 34, 34 }, { 34, 34 }, { 34, 34 }, { 35, 35 }, { 35, 35 }, { 35, 35 },
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- { 35, 35 }, { 36, 36 }, { 36, 36 }, { 36, 36 }, { 36, 36 }, { 37, 37 }, { 37, 37 }, { 37, 37 },
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- { 37, 37 }, { 38, 38 }, { 38, 38 }, { 38, 38 }, { 38, 38 }, { 39, 39 }, { 39, 39 }, { 39, 39 },
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- { 39, 39 }, { 40, 40 }, { 40, 40 }, { 40, 40 }, { 40, 40 }, { 41, 41 }, { 41, 41 }, { 41, 41 },
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- { 41, 41 }, { 42, 42 }, { 42, 42 }, { 42, 42 }, { 42, 42 }, { 43, 43 }, { 43, 43 }, { 43, 43 },
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- { 43, 43 }, { 44, 44 }, { 44, 44 }, { 44, 44 }, { 44, 44 }, { 45, 45 }, { 45, 45 }, { 45, 45 },
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- { 45, 45 }, { 46, 46 }, { 46, 46 }, { 46, 46 }, { 46, 46 }, { 47, 47 }, { 47, 47 }, { 47, 47 },
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- { 47, 47 }, { 48, 48 }, { 48, 48 }, { 48, 48 }, { 48, 48 }, { 48, 48 }, { 49, 49 }, { 49, 49 },
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- { 49, 49 }, { 49, 49 }, { 50, 50 }, { 50, 50 }, { 50, 50 }, { 50, 50 }, { 51, 51 }, { 51, 51 },
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- { 51, 51 }, { 51, 51 }, { 52, 52 }, { 52, 52 }, { 52, 52 }, { 52, 52 }, { 53, 53 }, { 53, 53 },
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- { 53, 53 }, { 53, 53 }, { 54, 54 }, { 54, 54 }, { 54, 54 }, { 54, 54 }, { 55, 55 }, { 55, 55 },
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- { 55, 55 }, { 55, 55 }, { 56, 56 }, { 56, 56 }, { 56, 56 }, { 56, 56 }, { 57, 57 }, { 57, 57 },
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- { 57, 57 }, { 57, 57 }, { 58, 58 }, { 58, 58 }, { 58, 58 }, { 58, 58 }, { 59, 59 }, { 59, 59 },
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- { 59, 59 }, { 59, 59 }, { 60, 60 }, { 60, 60 }, { 60, 60 }, { 60, 60 }, { 61, 61 }, { 61, 61 },
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- { 61, 61 }, { 61, 61 }, { 62, 62 }, { 62, 62 }, { 62, 62 }, { 62, 62 }, { 63, 63 }, { 63, 63 },
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+ { 0, 0 }, { 0, 1 }, { 1, 0 }, { 1, 1 }, { 1, 1 }, { 1, 2 }, { 2, 1 }, { 2, 2 },
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+ { 2, 2 }, { 2, 3 }, { 3, 2 }, { 3, 3 }, { 3, 3 }, { 3, 4 }, { 4, 3 }, { 4, 4 },
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+ { 4, 4 }, { 4, 5 }, { 5, 4 }, { 5, 5 }, { 5, 5 }, { 5, 6 }, { 6, 5 }, { 6, 6 },
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+ { 6, 6 }, { 6, 7 }, { 7, 6 }, { 7, 7 }, { 7, 7 }, { 7, 8 }, { 8, 7 }, { 8, 8 },
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+ { 8, 8 }, { 8, 9 }, { 9, 8 }, { 9, 9 }, { 9, 9 }, { 9, 10 }, { 10, 9 }, { 10, 10 },
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+ { 10, 10 }, { 10, 11 }, { 11, 10 }, { 8, 16 }, { 11, 11 }, { 11, 12 }, { 12, 11 }, { 9, 17 },
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+ { 12, 12 }, { 12, 13 }, { 13, 12 }, { 11, 16 }, { 13, 13 }, { 13, 14 }, { 14, 13 }, { 12, 17 },
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+ { 14, 14 }, { 14, 15 }, { 15, 14 }, { 14, 16 }, { 15, 15 }, { 15, 16 }, { 16, 14 }, { 16, 15 },
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+ { 17, 14 }, { 16, 16 }, { 16, 17 }, { 17, 16 }, { 18, 15 }, { 17, 17 }, { 17, 18 }, { 18, 17 },
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+ { 20, 14 }, { 18, 18 }, { 18, 19 }, { 19, 18 }, { 21, 15 }, { 19, 19 }, { 19, 20 }, { 20, 19 },
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+ { 20, 20 }, { 20, 20 }, { 20, 21 }, { 21, 20 }, { 21, 21 }, { 21, 21 }, { 21, 22 }, { 22, 21 },
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+ { 22, 22 }, { 22, 22 }, { 22, 23 }, { 23, 22 }, { 23, 23 }, { 23, 23 }, { 23, 24 }, { 24, 23 },
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+ { 24, 24 }, { 24, 24 }, { 24, 25 }, { 25, 24 }, { 25, 25 }, { 25, 25 }, { 25, 26 }, { 26, 25 },
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+ { 26, 26 }, { 26, 26 }, { 26, 27 }, { 27, 26 }, { 24, 32 }, { 27, 27 }, { 27, 28 }, { 28, 27 },
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+ { 25, 33 }, { 28, 28 }, { 28, 29 }, { 29, 28 }, { 27, 32 }, { 29, 29 }, { 29, 30 }, { 30, 29 },
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+ { 28, 33 }, { 30, 30 }, { 30, 31 }, { 31, 30 }, { 30, 32 }, { 31, 31 }, { 31, 32 }, { 32, 30 },
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+ { 32, 31 }, { 33, 30 }, { 32, 32 }, { 32, 33 }, { 33, 32 }, { 34, 31 }, { 33, 33 }, { 33, 34 },
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+ { 34, 33 }, { 36, 30 }, { 34, 34 }, { 34, 35 }, { 35, 34 }, { 37, 31 }, { 35, 35 }, { 35, 36 },
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+ { 36, 35 }, { 36, 36 }, { 36, 36 }, { 36, 37 }, { 37, 36 }, { 37, 37 }, { 37, 37 }, { 37, 38 },
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+ { 38, 37 }, { 38, 38 }, { 38, 38 }, { 38, 39 }, { 39, 38 }, { 39, 39 }, { 39, 39 }, { 39, 40 },
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+ { 40, 39 }, { 40, 40 }, { 40, 40 }, { 40, 41 }, { 41, 40 }, { 41, 41 }, { 41, 41 }, { 41, 42 },
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+ { 42, 41 }, { 42, 42 }, { 42, 42 }, { 42, 43 }, { 43, 42 }, { 40, 48 }, { 43, 43 }, { 43, 44 },
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+ { 44, 43 }, { 41, 49 }, { 44, 44 }, { 44, 45 }, { 45, 44 }, { 43, 48 }, { 45, 45 }, { 45, 46 },
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+ { 46, 45 }, { 44, 49 }, { 46, 46 }, { 46, 47 }, { 47, 46 }, { 46, 48 }, { 47, 47 }, { 47, 48 },
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+ { 48, 46 }, { 48, 47 }, { 49, 46 }, { 48, 48 }, { 48, 49 }, { 49, 48 }, { 50, 47 }, { 49, 49 },
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+ { 49, 50 }, { 50, 49 }, { 52, 46 }, { 50, 50 }, { 50, 51 }, { 51, 50 }, { 53, 47 }, { 51, 51 },
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+ { 51, 52 }, { 52, 51 }, { 52, 52 }, { 52, 52 }, { 52, 53 }, { 53, 52 }, { 53, 53 }, { 53, 53 },
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+ { 53, 54 }, { 54, 53 }, { 54, 54 }, { 54, 54 }, { 54, 55 }, { 55, 54 }, { 55, 55 }, { 55, 55 },
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+ { 55, 56 }, { 56, 55 }, { 56, 56 }, { 56, 56 }, { 56, 57 }, { 57, 56 }, { 57, 57 }, { 57, 57 },
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+ { 57, 58 }, { 58, 57 }, { 58, 58 }, { 58, 58 }, { 58, 59 }, { 59, 58 }, { 59, 59 }, { 59, 59 },
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+ { 59, 60 }, { 60, 59 }, { 60, 60 }, { 60, 60 }, { 60, 61 }, { 61, 60 }, { 61, 61 }, { 61, 61 },
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+ { 61, 62 }, { 62, 61 }, { 62, 62 }, { 62, 62 }, { 62, 63 }, { 63, 62 }, { 63, 63 }, { 63, 63 },
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};
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static int stb__Mul8Bit(int a, int b)
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@@ -649,7 +650,7 @@ int main()
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for (mx=0;mx<size;mx++) {
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int mine = (mn * dequant) >> 4;
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int maxe = (mx * dequant) >> 4;
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- int err = abs(stb__Lerp13(maxe, mine) - j);
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+ int err = abs(stb__Lerp13(maxe, mine) - j) * 100;
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// DX10 spec says that interpolation must be within 3% of "correct" result,
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// add this as error term. Normally we'd expect a random distribution of
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Fabian Giesen