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- /**************************************************************************
-
- HTTABLES.C - halftone tables
-
- **************************************************************************/
- /**************************************************************************
-
- (C) Copyright 1994 Microsoft Corp. All rights reserved.
-
- You have a royalty-free right to use, modify, reproduce and
- distribute the Sample Files (and/or any modified version) in
- any way you find useful, provided that you agree that
- Microsoft has no warranty obligations or liability for any
- Sample Application Files which are modified.
-
- **************************************************************************/
-
- #include<windows.h>
- #include<memory.h>
-
- #include<wing.h>
-
-
- long const PALETTERGBFlag = 0x02000000;
- long const PALETTEINDEXFlag = 0x01000000;
-
- /*----------------------------------------------------------------------------
-
- Division lookup tables. These tables compute 0-255 divided by 51 and
- modulo 51. These tables could approximate gamma correction.
-
- */
-
- char unsigned const aDividedBy51Rounded[256] =
- {
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
- 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
- 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
- 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
- 2, 2, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
- 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
- 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
- 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
- 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,
- 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,
- };
-
- char unsigned const aDividedBy51[256] =
- {
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
- 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
- 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
- 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
- 2, 2, 2, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
- 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
- 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
- 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
- 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 5,
- };
-
- char unsigned const aModulo51[256] =
- {
- 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19,
- 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37,
- 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 0, 1, 2, 3, 4, 5, 6,
- 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25,
- 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43,
- 44, 45, 46, 47, 48, 49, 50, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12,
- 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30,
- 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48,
- 49, 50, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17,
- 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35,
- 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 0, 1, 2, 3,
- 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22,
- 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40,
- 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 0,
- };
-
-
- /*----------------------------------------------------------------------------
-
- Multiplication LUTs. These compute 0-5 times 6 and 36.
-
- */
-
- char unsigned const aTimes6[6] =
- {
- 0, 6, 12, 18, 24, 30
- };
-
- char unsigned const aTimes36[6] =
- {
- 0, 36, 72, 108, 144, 180
- };
-
-
- /*----------------------------------------------------------------------------
-
- Dither matrices for 8 bit to 2.6 bit halftones.
-
- */
-
- char unsigned const aHalftone16x16[256] =
- {
- 0, 44, 9, 41, 3, 46, 12, 43, 1, 44, 10, 41, 3, 46, 12, 43,
- 34, 16, 25, 19, 37, 18, 28, 21, 35, 16, 26, 19, 37, 18, 28, 21,
- 38, 6, 47, 3, 40, 9, 50, 6, 38, 7, 47, 4, 40, 9, 49, 6,
- 22, 28, 13, 31, 25, 31, 15, 34, 22, 29, 13, 32, 24, 31, 15, 34,
- 2, 46, 12, 43, 1, 45, 10, 42, 2, 45, 11, 42, 1, 45, 11, 42,
- 37, 18, 27, 21, 35, 17, 26, 20, 36, 17, 27, 20, 36, 17, 26, 20,
- 40, 8, 49, 5, 38, 7, 48, 4, 39, 8, 48, 5, 39, 7, 48, 4,
- 24, 30, 15, 33, 23, 29, 13, 32, 23, 30, 14, 33, 23, 29, 14, 32,
- 2, 46, 12, 43, 0, 44, 10, 41, 3, 47, 12, 44, 0, 44, 10, 41,
- 37, 18, 27, 21, 35, 16, 25, 19, 37, 19, 28, 22, 35, 16, 25, 19,
- 40, 9, 49, 5, 38, 7, 47, 4, 40, 9, 50, 6, 38, 6, 47, 3,
- 24, 30, 15, 34, 22, 29, 13, 32, 25, 31, 15, 34, 22, 28, 13, 31,
- 1, 45, 11, 42, 2, 46, 11, 42, 1, 45, 10, 41, 2, 46, 11, 43,
- 36, 17, 26, 20, 36, 17, 27, 21, 35, 16, 26, 20, 36, 18, 27, 21,
- 39, 8, 48, 4, 39, 8, 49, 5, 38, 7, 48, 4, 39, 8, 49, 5,
- 23, 29, 14, 33, 24, 30, 14, 33, 23, 29, 13, 32, 24, 30, 14, 33,
- };
-
- char unsigned const aHalftone8x8[64] =
- {
- 0, 38, 9, 47, 2, 40, 11, 50,
- 25, 12, 35, 22, 27, 15, 37, 24,
- 6, 44, 3, 41, 8, 47, 5, 43,
- 31, 19, 28, 15, 34, 21, 31, 18,
- 1, 39, 11, 49, 0, 39, 10, 48,
- 27, 14, 36, 23, 26, 13, 35, 23,
- 7, 46, 4, 43, 7, 45, 3, 42,
- 33, 20, 30, 17, 32, 19, 29, 16,
- };
-
- char unsigned const aHalftone4x4_1[16] =
- {
- 0, 25, 6, 31,
- 38, 12, 44, 19,
- 9, 35, 3, 28,
- 47, 22, 41, 15
- };
-
- char unsigned const aHalftone4x4_2[16] =
- {
- 41, 3, 9, 28,
- 35, 15, 22, 47,
- 6, 25, 38, 0,
- 19, 44, 31, 12
- };
-
- /***************************************************************************
- aWinGHalftoneTranslation
-
- Translates a 2.6 bit-per-pixel halftoned representation into the
- slightly rearranged WinG Halftone Palette.
- */
-
- char unsigned const aWinGHalftoneTranslation[216] =
- {
- 0,
- 29,
- 30,
- 31,
- 32,
- 249,
- 33,
- 34,
- 35,
- 36,
- 37,
- 38,
- 39,
- 40,
- 41,
- 42,
- 43,
- 44,
- 45,
- 46,
- 47,
- 48,
- 49,
- 50,
- 51,
- 52,
- 53,
- 54,
- 55,
- 56,
- 250,
- 250,
- 57,
- 58,
- 59,
- 251,
- 60,
- 61,
- 62,
- 63,
- 64,
- 65,
- 66,
- 67,
- 68,
- 69,
- 70,
- 71,
- 72,
- 73,
- 74,
- 75,
- 76,
- 77,
- 78,
- 79,
- 80,
- 81,
- 82,
- 83,
- 84,
- 85,
- 86,
- 87,
- 88,
- 89,
- 250,
- 90,
- 91,
- 92,
- 93,
- 94,
- 95,
- 96,
- 97,
- 98,
- 99,
- 100,
- 101,
- 102,
- 103,
- 104,
- 105,
- 106,
- 107,
- 108,
- 109,
- 110,
- 111,
- 227,
- 112,
- 113,
- 114,
- 115,
- 116,
- 117,
- 118,
- 119,
- 151,
- 120,
- 121,
- 122,
- 123,
- 124,
- 228,
- 125,
- 126,
- 229,
- 133,
- 162,
- 135,
- 131,
- 132,
- 137,
- 166,
- 134,
- 140,
- 130,
- 136,
- 143,
- 138,
- 139,
- 174,
- 141,
- 142,
- 177,
- 129,
- 144,
- 145,
- 146,
- 147,
- 148,
- 149,
- 150,
- 157,
- 152,
- 153,
- 154,
- 155,
- 156,
- 192,
- 158,
- 159,
- 160,
- 161,
- 196,
- 163,
- 164,
- 165,
- 127,
- 199,
- 167,
- 168,
- 169,
- 170,
- 171,
- 172,
- 173,
- 207,
- 175,
- 176,
- 210,
- 178,
- 179,
- 180,
- 181,
- 182,
- 183,
- 184,
- 185,
- 186,
- 187,
- 188,
- 189,
- 190,
- 191,
- 224,
- 193,
- 194,
- 195,
- 252,
- 252,
- 197,
- 198,
- 128,
- 253,
- 252,
- 200,
- 201,
- 202,
- 203,
- 204,
- 205,
- 206,
- 230,
- 208,
- 209,
- 231,
- 211,
- 212,
- 213,
- 214,
- 215,
- 216,
- 217,
- 218,
- 219,
- 220,
- 221,
- 222,
- 254,
- 223,
- 232,
- 225,
- 226,
- 255,
- };
-
-