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|
/* GIMP - The GNU Image Manipulation Program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
#ifndef __GIMP_IMAGE_CONVERT_FSDITHER_H__
#define __GIMP_IMAGE_CONVERT_FSDITHER_H__
/* The following 5 arrays are used in performing floyd-steinberg
* error diffusion dithering. The range array allows the quick
* bounds checking of pixel values. The 4 error arrays contain
* the error computations for the east, south-east, south and
* south-west pixels surrounding the current pixel respectively.
*/
static const guchar range_array[] = {
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, 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, 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, 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, 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, 0, 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, 51, 52, 53,
54, 55, 56, 57, 58, 59, 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, 90, 91, 92, 93,
94, 95, 96, 97, 98, 99, 100, 101, 102, 103,
104, 105, 106, 107, 108, 109, 110, 111, 112, 113,
114, 115, 116, 117, 118, 119, 120, 121, 122, 123,
124, 125, 126, 127, 128, 129, 130, 131, 132, 133,
134, 135, 136, 137, 138, 139, 140, 141, 142, 143,
144, 145, 146, 147, 148, 149, 150, 151, 152, 153,
154, 155, 156, 157, 158, 159, 160, 161, 162, 163,
164, 165, 166, 167, 168, 169, 170, 171, 172, 173,
174, 175, 176, 177, 178, 179, 180, 181, 182, 183,
184, 185, 186, 187, 188, 189, 190, 191, 192, 193,
194, 195, 196, 197, 198, 199, 200, 201, 202, 203,
204, 205, 206, 207, 208, 209, 210, 211, 212, 213,
214, 215, 216, 217, 218, 219, 220, 221, 222, 223,
224, 225, 226, 227, 228, 229, 230, 231, 232, 233,
234, 235, 236, 237, 238, 239, 240, 241, 242, 243,
244, 245, 246, 247, 248, 249, 250, 251, 252, 253,
254, 255, 255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255,
};
static const gshort floyd_steinberg_error1[] = {
-223, -223, -222, -222, -221, -221, -220, -220, -220, -219,
-219, -218, -218, -217, -217, -217, -216, -216, -215, -215,
-214, -214, -213, -213, -213, -212, -212, -211, -211, -210,
-210, -210, -209, -209, -208, -208, -207, -207, -206, -206,
-206, -205, -205, -204, -204, -203, -203, -203, -202, -202,
-201, -201, -200, -200, -199, -199, -199, -198, -198, -197,
-197, -196, -196, -196, -195, -195, -194, -194, -193, -193,
-192, -192, -192, -191, -191, -190, -190, -189, -189, -189,
-188, -188, -187, -187, -186, -186, -185, -185, -185, -184,
-184, -183, -183, -182, -182, -182, -181, -181, -180, -180,
-179, -179, -178, -178, -178, -177, -177, -176, -176, -175,
-175, -175, -174, -174, -173, -173, -172, -172, -171, -171,
-171, -170, -170, -169, -169, -168, -168, -168, -167, -167,
-166, -166, -165, -165, -164, -164, -164, -163, -163, -162,
-162, -161, -161, -161, -160, -160, -159, -159, -158, -158,
-157, -157, -157, -156, -156, -155, -155, -154, -154, -154,
-153, -153, -152, -152, -151, -151, -150, -150, -150, -149,
-149, -148, -148, -147, -147, -147, -146, -146, -145, -145,
-144, -144, -143, -143, -143, -142, -142, -141, -141, -140,
-140, -140, -139, -139, -138, -138, -137, -137, -136, -136,
-136, -135, -135, -134, -134, -133, -133, -133, -132, -132,
-131, -131, -130, -130, -129, -129, -129, -128, -128, -127,
-127, -126, -126, -126, -125, -125, -124, -124, -123, -123,
-122, -122, -122, -121, -121, -120, -120, -119, -119, -119,
-118, -118, -117, -117, -116, -116, -115, -115, -115, -114,
-114, -113, -113, -112, -112, -112, -111, -111, -110, -110,
-109, -109, -108, -108, -108, -107, -107, -106, -106, -105,
-105, -105, -104, -104, -103, -103, -102, -102, -101, -101,
-101, -100, -100, -99, -99, -98, -98, -98, -97, -97,
-96, -96, -95, -95, -94, -94, -94, -93, -93, -92,
-92, -91, -91, -91, -90, -90, -89, -89, -88, -88,
-87, -87, -87, -86, -86, -85, -85, -84, -84, -84,
-83, -83, -82, -82, -81, -81, -80, -80, -80, -79,
-79, -78, -78, -77, -77, -77, -76, -76, -75, -75,
-74, -74, -73, -73, -73, -72, -72, -71, -71, -70,
-70, -70, -69, -69, -68, -68, -67, -67, -66, -66,
-66, -65, -65, -64, -64, -63, -63, -63, -62, -62,
-61, -61, -60, -60, -59, -59, -59, -58, -58, -57,
-57, -56, -56, -56, -55, -55, -54, -54, -53, -53,
-52, -52, -52, -51, -51, -50, -50, -49, -49, -49,
-48, -48, -47, -47, -46, -46, -45, -45, -45, -44,
-44, -43, -43, -42, -42, -42, -41, -41, -40, -40,
-39, -39, -38, -38, -38, -37, -37, -36, -36, -35,
-35, -35, -34, -34, -33, -33, -32, -32, -31, -31,
-31, -30, -30, -29, -29, -28, -28, -28, -27, -27,
-26, -26, -25, -25, -24, -24, -24, -23, -23, -22,
-22, -21, -21, -21, -20, -20, -19, -19, -18, -18,
-17, -17, -17, -16, -16, -15, -15, -14, -14, -14,
-13, -13, -12, -12, -11, -11, -10, -10, -10, -9,
-9, -8, -8, -7, -7, -7, -6, -6, -5, -5,
-4, -4, -3, -3, -3, -2, -2, -1, -1, 0,
0, 0, 0, 0, 1, 1, 2, 2, 3, 3,
3, 4, 4, 5, 5, 6, 6, 7, 7, 7,
8, 8, 9, 9, 10, 10, 10, 11, 11, 12,
12, 13, 13, 14, 14, 14, 15, 15, 16, 16,
17, 17, 17, 18, 18, 19, 19, 20, 20, 21,
21, 21, 22, 22, 23, 23, 24, 24, 24, 25,
25, 26, 26, 27, 27, 28, 28, 28, 29, 29,
30, 30, 31, 31, 31, 32, 32, 33, 33, 34,
34, 35, 35, 35, 36, 36, 37, 37, 38, 38,
38, 39, 39, 40, 40, 41, 41, 42, 42, 42,
43, 43, 44, 44, 45, 45, 45, 46, 46, 47,
47, 48, 48, 49, 49, 49, 50, 50, 51, 51,
52, 52, 52, 53, 53, 54, 54, 55, 55, 56,
56, 56, 57, 57, 58, 58, 59, 59, 59, 60,
60, 61, 61, 62, 62, 63, 63, 63, 64, 64,
65, 65, 66, 66, 66, 67, 67, 68, 68, 69,
69, 70, 70, 70, 71, 71, 72, 72, 73, 73,
73, 74, 74, 75, 75, 76, 76, 77, 77, 77,
78, 78, 79, 79, 80, 80, 80, 81, 81, 82,
82, 83, 83, 84, 84, 84, 85, 85, 86, 86,
87, 87, 87, 88, 88, 89, 89, 90, 90, 91,
91, 91, 92, 92, 93, 93, 94, 94, 94, 95,
95, 96, 96, 97, 97, 98, 98, 98, 99, 99,
100, 100, 101, 101, 101, 102, 102, 103, 103, 104,
104, 105, 105, 105, 106, 106, 107, 107, 108, 108,
108, 109, 109, 110, 110, 111, 111, 112, 112, 112,
113, 113, 114, 114, 115, 115, 115, 116, 116, 117,
117, 118, 118, 119, 119, 119, 120, 120, 121, 121,
122, 122, 122, 123, 123, 124, 124, 125, 125, 126,
126, 126, 127, 127, 128, 128, 129, 129, 129, 130,
130, 131, 131, 132, 132, 133, 133, 133, 134, 134,
135, 135, 136, 136, 136, 137, 137, 138, 138, 139,
139, 140, 140, 140, 141, 141, 142, 142, 143, 143,
143, 144, 144, 145, 145, 146, 146, 147, 147, 147,
148, 148, 149, 149, 150, 150, 150, 151, 151, 152,
152, 153, 153, 154, 154, 154, 155, 155, 156, 156,
157, 157, 157, 158, 158, 159, 159, 160, 160, 161,
161, 161, 162, 162, 163, 163, 164, 164, 164, 165,
165, 166, 166, 167, 167, 168, 168, 168, 169, 169,
170, 170, 171, 171, 171, 172, 172, 173, 173, 174,
174, 175, 175, 175, 176, 176, 177, 177, 178, 178,
178, 179, 179, 180, 180, 181, 181, 182, 182, 182,
183, 183, 184, 184, 185, 185, 185, 186, 186, 187,
187, 188, 188, 189, 189, 189, 190, 190, 191, 191,
192, 192, 192, 193, 193, 194, 194, 195, 195, 196,
196, 196, 197, 197, 198, 198, 199, 199, 199, 200,
200, 201, 201, 202, 202, 203, 203, 203, 204, 204,
205, 205, 206, 206, 206, 207, 207, 208, 208, 209,
209, 210, 210, 210, 211, 211, 212, 212, 213, 213,
213, 214, 214, 215, 215, 216, 216, 217, 217, 217,
218, 218, 219, 219, 220, 220, 220, 221, 221, 222,
222, 223, 223, 224, 224,
};
static const gshort floyd_steinberg_error2[] = {
-95, -95, -95, -95, -95, -94, -94, -94, -94, -94,
-93, -93, -93, -93, -93, -93, -92, -92, -92, -92,
-92, -91, -91, -91, -91, -91, -90, -90, -90, -90,
-90, -90, -89, -89, -89, -89, -89, -88, -88, -88,
-88, -88, -87, -87, -87, -87, -87, -87, -86, -86,
-86, -86, -86, -85, -85, -85, -85, -85, -84, -84,
-84, -84, -84, -84, -83, -83, -83, -83, -83, -82,
-82, -82, -82, -82, -81, -81, -81, -81, -81, -81,
-80, -80, -80, -80, -80, -79, -79, -79, -79, -79,
-78, -78, -78, -78, -78, -78, -77, -77, -77, -77,
-77, -76, -76, -76, -76, -76, -75, -75, -75, -75,
-75, -75, -74, -74, -74, -74, -74, -73, -73, -73,
-73, -73, -72, -72, -72, -72, -72, -72, -71, -71,
-71, -71, -71, -70, -70, -70, -70, -70, -69, -69,
-69, -69, -69, -69, -68, -68, -68, -68, -68, -67,
-67, -67, -67, -67, -66, -66, -66, -66, -66, -66,
-65, -65, -65, -65, -65, -64, -64, -64, -64, -64,
-63, -63, -63, -63, -63, -63, -62, -62, -62, -62,
-62, -61, -61, -61, -61, -61, -60, -60, -60, -60,
-60, -60, -59, -59, -59, -59, -59, -58, -58, -58,
-58, -58, -57, -57, -57, -57, -57, -57, -56, -56,
-56, -56, -56, -55, -55, -55, -55, -55, -54, -54,
-54, -54, -54, -54, -53, -53, -53, -53, -53, -52,
-52, -52, -52, -52, -51, -51, -51, -51, -51, -51,
-50, -50, -50, -50, -50, -49, -49, -49, -49, -49,
-48, -48, -48, -48, -48, -48, -47, -47, -47, -47,
-47, -46, -46, -46, -46, -46, -45, -45, -45, -45,
-45, -45, -44, -44, -44, -44, -44, -43, -43, -43,
-43, -43, -42, -42, -42, -42, -42, -42, -41, -41,
-41, -41, -41, -40, -40, -40, -40, -40, -39, -39,
-39, -39, -39, -39, -38, -38, -38, -38, -38, -37,
-37, -37, -37, -37, -36, -36, -36, -36, -36, -36,
-35, -35, -35, -35, -35, -34, -34, -34, -34, -34,
-33, -33, -33, -33, -33, -33, -32, -32, -32, -32,
-32, -31, -31, -31, -31, -31, -30, -30, -30, -30,
-30, -30, -29, -29, -29, -29, -29, -28, -28, -28,
-28, -28, -27, -27, -27, -27, -27, -27, -26, -26,
-26, -26, -26, -25, -25, -25, -25, -25, -24, -24,
-24, -24, -24, -24, -23, -23, -23, -23, -23, -22,
-22, -22, -22, -22, -21, -21, -21, -21, -21, -21,
-20, -20, -20, -20, -20, -19, -19, -19, -19, -19,
-18, -18, -18, -18, -18, -18, -17, -17, -17, -17,
-17, -16, -16, -16, -16, -16, -15, -15, -15, -15,
-15, -15, -14, -14, -14, -14, -14, -13, -13, -13,
-13, -13, -12, -12, -12, -12, -12, -12, -11, -11,
-11, -11, -11, -10, -10, -10, -10, -10, -9, -9,
-9, -9, -9, -9, -8, -8, -8, -8, -8, -7,
-7, -7, -7, -7, -6, -6, -6, -6, -6, -6,
-5, -5, -5, -5, -5, -4, -4, -4, -4, -4,
-3, -3, -3, -3, -3, -3, -2, -2, -2, -2,
-2, -1, -1, -1, -1, -1, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 1, 1, 1,
1, 1, 2, 2, 2, 2, 2, 3, 3, 3,
3, 3, 3, 4, 4, 4, 4, 4, 5, 5,
5, 5, 5, 6, 6, 6, 6, 6, 6, 7,
7, 7, 7, 7, 8, 8, 8, 8, 8, 9,
9, 9, 9, 9, 9, 10, 10, 10, 10, 10,
11, 11, 11, 11, 11, 12, 12, 12, 12, 12,
12, 13, 13, 13, 13, 13, 14, 14, 14, 14,
14, 15, 15, 15, 15, 15, 15, 16, 16, 16,
16, 16, 17, 17, 17, 17, 17, 18, 18, 18,
18, 18, 18, 19, 19, 19, 19, 19, 20, 20,
20, 20, 20, 21, 21, 21, 21, 21, 21, 22,
22, 22, 22, 22, 23, 23, 23, 23, 23, 24,
24, 24, 24, 24, 24, 25, 25, 25, 25, 25,
26, 26, 26, 26, 26, 27, 27, 27, 27, 27,
27, 28, 28, 28, 28, 28, 29, 29, 29, 29,
29, 30, 30, 30, 30, 30, 30, 31, 31, 31,
31, 31, 32, 32, 32, 32, 32, 33, 33, 33,
33, 33, 33, 34, 34, 34, 34, 34, 35, 35,
35, 35, 35, 36, 36, 36, 36, 36, 36, 37,
37, 37, 37, 37, 38, 38, 38, 38, 38, 39,
39, 39, 39, 39, 39, 40, 40, 40, 40, 40,
41, 41, 41, 41, 41, 42, 42, 42, 42, 42,
42, 43, 43, 43, 43, 43, 44, 44, 44, 44,
44, 45, 45, 45, 45, 45, 45, 46, 46, 46,
46, 46, 47, 47, 47, 47, 47, 48, 48, 48,
48, 48, 48, 49, 49, 49, 49, 49, 50, 50,
50, 50, 50, 51, 51, 51, 51, 51, 51, 52,
52, 52, 52, 52, 53, 53, 53, 53, 53, 54,
54, 54, 54, 54, 54, 55, 55, 55, 55, 55,
56, 56, 56, 56, 56, 57, 57, 57, 57, 57,
57, 58, 58, 58, 58, 58, 59, 59, 59, 59,
59, 60, 60, 60, 60, 60, 60, 61, 61, 61,
61, 61, 62, 62, 62, 62, 62, 63, 63, 63,
63, 63, 63, 64, 64, 64, 64, 64, 65, 65,
65, 65, 65, 66, 66, 66, 66, 66, 66, 67,
67, 67, 67, 67, 68, 68, 68, 68, 68, 69,
69, 69, 69, 69, 69, 70, 70, 70, 70, 70,
71, 71, 71, 71, 71, 72, 72, 72, 72, 72,
72, 73, 73, 73, 73, 73, 74, 74, 74, 74,
74, 75, 75, 75, 75, 75, 75, 76, 76, 76,
76, 76, 77, 77, 77, 77, 77, 78, 78, 78,
78, 78, 78, 79, 79, 79, 79, 79, 80, 80,
80, 80, 80, 81, 81, 81, 81, 81, 81, 82,
82, 82, 82, 82, 83, 83, 83, 83, 83, 84,
84, 84, 84, 84, 84, 85, 85, 85, 85, 85,
86, 86, 86, 86, 86, 87, 87, 87, 87, 87,
87, 88, 88, 88, 88, 88, 89, 89, 89, 89,
89, 90, 90, 90, 90, 90, 90, 91, 91, 91,
91, 91, 92, 92, 92, 92, 92, 93, 93, 93,
93, 93, 93, 94, 94, 94, 94, 94, 95, 95,
95, 95, 95, 96, 96,
};
static const gshort floyd_steinberg_error3[] = {
-159, -159, -159, -158, -158, -158, -157, -157, -157, -156,
-156, -156, -155, -155, -155, -155, -154, -154, -154, -153,
-153, -153, -152, -152, -152, -151, -151, -151, -150, -150,
-150, -150, -149, -149, -149, -148, -148, -148, -147, -147,
-147, -146, -146, -146, -145, -145, -145, -145, -144, -144,
-144, -143, -143, -143, -142, -142, -142, -141, -141, -141,
-140, -140, -140, -140, -139, -139, -139, -138, -138, -138,
-137, -137, -137, -136, -136, -136, -135, -135, -135, -135,
-134, -134, -134, -133, -133, -133, -132, -132, -132, -131,
-131, -131, -130, -130, -130, -130, -129, -129, -129, -128,
-128, -128, -127, -127, -127, -126, -126, -126, -125, -125,
-125, -125, -124, -124, -124, -123, -123, -123, -122, -122,
-122, -121, -121, -121, -120, -120, -120, -120, -119, -119,
-119, -118, -118, -118, -117, -117, -117, -116, -116, -116,
-115, -115, -115, -115, -114, -114, -114, -113, -113, -113,
-112, -112, -112, -111, -111, -111, -110, -110, -110, -110,
-109, -109, -109, -108, -108, -108, -107, -107, -107, -106,
-106, -106, -105, -105, -105, -105, -104, -104, -104, -103,
-103, -103, -102, -102, -102, -101, -101, -101, -100, -100,
-100, -100, -99, -99, -99, -98, -98, -98, -97, -97,
-97, -96, -96, -96, -95, -95, -95, -95, -94, -94,
-94, -93, -93, -93, -92, -92, -92, -91, -91, -91,
-90, -90, -90, -90, -89, -89, -89, -88, -88, -88,
-87, -87, -87, -86, -86, -86, -85, -85, -85, -85,
-84, -84, -84, -83, -83, -83, -82, -82, -82, -81,
-81, -81, -80, -80, -80, -80, -79, -79, -79, -78,
-78, -78, -77, -77, -77, -76, -76, -76, -75, -75,
-75, -75, -74, -74, -74, -73, -73, -73, -72, -72,
-72, -71, -71, -71, -70, -70, -70, -70, -69, -69,
-69, -68, -68, -68, -67, -67, -67, -66, -66, -66,
-65, -65, -65, -65, -64, -64, -64, -63, -63, -63,
-62, -62, -62, -61, -61, -61, -60, -60, -60, -60,
-59, -59, -59, -58, -58, -58, -57, -57, -57, -56,
-56, -56, -55, -55, -55, -55, -54, -54, -54, -53,
-53, -53, -52, -52, -52, -51, -51, -51, -50, -50,
-50, -50, -49, -49, -49, -48, -48, -48, -47, -47,
-47, -46, -46, -46, -45, -45, -45, -45, -44, -44,
-44, -43, -43, -43, -42, -42, -42, -41, -41, -41,
-40, -40, -40, -40, -39, -39, -39, -38, -38, -38,
-37, -37, -37, -36, -36, -36, -35, -35, -35, -35,
-34, -34, -34, -33, -33, -33, -32, -32, -32, -31,
-31, -31, -30, -30, -30, -30, -29, -29, -29, -28,
-28, -28, -27, -27, -27, -26, -26, -26, -25, -25,
-25, -25, -24, -24, -24, -23, -23, -23, -22, -22,
-22, -21, -21, -21, -20, -20, -20, -20, -19, -19,
-19, -18, -18, -18, -17, -17, -17, -16, -16, -16,
-15, -15, -15, -15, -14, -14, -14, -13, -13, -13,
-12, -12, -12, -11, -11, -11, -10, -10, -10, -10,
-9, -9, -9, -8, -8, -8, -7, -7, -7, -6,
-6, -6, -5, -5, -5, -5, -4, -4, -4, -3,
-3, -3, -2, -2, -2, -1, -1, -1, 0, 0,
0, 0, 0, 0, 0, 1, 1, 1, 2, 2,
2, 3, 3, 3, 4, 4, 4, 5, 5, 5,
5, 6, 6, 6, 7, 7, 7, 8, 8, 8,
9, 9, 9, 10, 10, 10, 10, 11, 11, 11,
12, 12, 12, 13, 13, 13, 14, 14, 14, 15,
15, 15, 15, 16, 16, 16, 17, 17, 17, 18,
18, 18, 19, 19, 19, 20, 20, 20, 20, 21,
21, 21, 22, 22, 22, 23, 23, 23, 24, 24,
24, 25, 25, 25, 25, 26, 26, 26, 27, 27,
27, 28, 28, 28, 29, 29, 29, 30, 30, 30,
30, 31, 31, 31, 32, 32, 32, 33, 33, 33,
34, 34, 34, 35, 35, 35, 35, 36, 36, 36,
37, 37, 37, 38, 38, 38, 39, 39, 39, 40,
40, 40, 40, 41, 41, 41, 42, 42, 42, 43,
43, 43, 44, 44, 44, 45, 45, 45, 45, 46,
46, 46, 47, 47, 47, 48, 48, 48, 49, 49,
49, 50, 50, 50, 50, 51, 51, 51, 52, 52,
52, 53, 53, 53, 54, 54, 54, 55, 55, 55,
55, 56, 56, 56, 57, 57, 57, 58, 58, 58,
59, 59, 59, 60, 60, 60, 60, 61, 61, 61,
62, 62, 62, 63, 63, 63, 64, 64, 64, 65,
65, 65, 65, 66, 66, 66, 67, 67, 67, 68,
68, 68, 69, 69, 69, 70, 70, 70, 70, 71,
71, 71, 72, 72, 72, 73, 73, 73, 74, 74,
74, 75, 75, 75, 75, 76, 76, 76, 77, 77,
77, 78, 78, 78, 79, 79, 79, 80, 80, 80,
80, 81, 81, 81, 82, 82, 82, 83, 83, 83,
84, 84, 84, 85, 85, 85, 85, 86, 86, 86,
87, 87, 87, 88, 88, 88, 89, 89, 89, 90,
90, 90, 90, 91, 91, 91, 92, 92, 92, 93,
93, 93, 94, 94, 94, 95, 95, 95, 95, 96,
96, 96, 97, 97, 97, 98, 98, 98, 99, 99,
99, 100, 100, 100, 100, 101, 101, 101, 102, 102,
102, 103, 103, 103, 104, 104, 104, 105, 105, 105,
105, 106, 106, 106, 107, 107, 107, 108, 108, 108,
109, 109, 109, 110, 110, 110, 110, 111, 111, 111,
112, 112, 112, 113, 113, 113, 114, 114, 114, 115,
115, 115, 115, 116, 116, 116, 117, 117, 117, 118,
118, 118, 119, 119, 119, 120, 120, 120, 120, 121,
121, 121, 122, 122, 122, 123, 123, 123, 124, 124,
124, 125, 125, 125, 125, 126, 126, 126, 127, 127,
127, 128, 128, 128, 129, 129, 129, 130, 130, 130,
130, 131, 131, 131, 132, 132, 132, 133, 133, 133,
134, 134, 134, 135, 135, 135, 135, 136, 136, 136,
137, 137, 137, 138, 138, 138, 139, 139, 139, 140,
140, 140, 140, 141, 141, 141, 142, 142, 142, 143,
143, 143, 144, 144, 144, 145, 145, 145, 145, 146,
146, 146, 147, 147, 147, 148, 148, 148, 149, 149,
149, 150, 150, 150, 150, 151, 151, 151, 152, 152,
152, 153, 153, 153, 154, 154, 154, 155, 155, 155,
155, 156, 156, 156, 157, 157, 157, 158, 158, 158,
159, 159, 159, 160, 160,
};
static const gshort floyd_steinberg_error4[] = {
-34, -33, -33, -33, -33, -33, -34, -33, -32, -33,
-33, -33, -33, -33, -32, -31, -33, -32, -32, -32,
-32, -32, -33, -32, -31, -32, -32, -32, -32, -32,
-31, -30, -32, -31, -31, -31, -31, -31, -32, -31,
-30, -31, -31, -31, -31, -31, -30, -29, -31, -30,
-30, -30, -30, -30, -31, -30, -29, -30, -30, -30,
-30, -30, -29, -28, -30, -29, -29, -29, -29, -29,
-30, -29, -28, -29, -29, -29, -29, -29, -28, -27,
-29, -28, -28, -28, -28, -28, -29, -28, -27, -28,
-28, -28, -28, -28, -27, -26, -28, -27, -27, -27,
-27, -27, -28, -27, -26, -27, -27, -27, -27, -27,
-26, -25, -27, -26, -26, -26, -26, -26, -27, -26,
-25, -26, -26, -26, -26, -26, -25, -24, -26, -25,
-25, -25, -25, -25, -26, -25, -24, -25, -25, -25,
-25, -25, -24, -23, -25, -24, -24, -24, -24, -24,
-25, -24, -23, -24, -24, -24, -24, -24, -23, -22,
-24, -23, -23, -23, -23, -23, -24, -23, -22, -23,
-23, -23, -23, -23, -22, -21, -23, -22, -22, -22,
-22, -22, -23, -22, -21, -22, -22, -22, -22, -22,
-21, -20, -22, -21, -21, -21, -21, -21, -22, -21,
-20, -21, -21, -21, -21, -21, -20, -19, -21, -20,
-20, -20, -20, -20, -21, -20, -19, -20, -20, -20,
-20, -20, -19, -18, -20, -19, -19, -19, -19, -19,
-20, -19, -18, -19, -19, -19, -19, -19, -18, -17,
-19, -18, -18, -18, -18, -18, -19, -18, -17, -18,
-18, -18, -18, -18, -17, -16, -18, -17, -17, -17,
-17, -17, -18, -17, -16, -17, -17, -17, -17, -17,
-16, -15, -17, -16, -16, -16, -16, -16, -17, -16,
-15, -16, -16, -16, -16, -16, -15, -14, -16, -15,
-15, -15, -15, -15, -16, -15, -14, -15, -15, -15,
-15, -15, -14, -13, -15, -14, -14, -14, -14, -14,
-15, -14, -13, -14, -14, -14, -14, -14, -13, -12,
-14, -13, -13, -13, -13, -13, -14, -13, -12, -13,
-13, -13, -13, -13, -12, -11, -13, -12, -12, -12,
-12, -12, -13, -12, -11, -12, -12, -12, -12, -12,
-11, -10, -12, -11, -11, -11, -11, -11, -12, -11,
-10, -11, -11, -11, -11, -11, -10, -9, -11, -10,
-10, -10, -10, -10, -11, -10, -9, -10, -10, -10,
-10, -10, -9, -8, -10, -9, -9, -9, -9, -9,
-10, -9, -8, -9, -9, -9, -9, -9, -8, -7,
-9, -8, -8, -8, -8, -8, -9, -8, -7, -8,
-8, -8, -8, -8, -7, -6, -8, -7, -7, -7,
-7, -7, -8, -7, -6, -7, -7, -7, -7, -7,
-6, -5, -7, -6, -6, -6, -6, -6, -7, -6,
-5, -6, -6, -6, -6, -6, -5, -4, -6, -5,
-5, -5, -5, -5, -6, -5, -4, -5, -5, -5,
-5, -5, -4, -3, -5, -4, -4, -4, -4, -4,
-5, -4, -3, -4, -4, -4, -4, -4, -3, -2,
-4, -3, -3, -3, -3, -3, -4, -3, -2, -3,
-3, -3, -3, -3, -2, -1, -3, -2, -2, -2,
-2, -2, -3, -2, -1, -2, -2, -2, -2, -2,
-1, 0, 1, 2, 2, 2, 2, 2, 1, 2,
3, 2, 2, 2, 2, 2, 3, 1, 2, 3,
3, 3, 3, 3, 2, 3, 4, 3, 3, 3,
3, 3, 4, 2, 3, 4, 4, 4, 4, 4,
3, 4, 5, 4, 4, 4, 4, 4, 5, 3,
4, 5, 5, 5, 5, 5, 4, 5, 6, 5,
5, 5, 5, 5, 6, 4, 5, 6, 6, 6,
6, 6, 5, 6, 7, 6, 6, 6, 6, 6,
7, 5, 6, 7, 7, 7, 7, 7, 6, 7,
8, 7, 7, 7, 7, 7, 8, 6, 7, 8,
8, 8, 8, 8, 7, 8, 9, 8, 8, 8,
8, 8, 9, 7, 8, 9, 9, 9, 9, 9,
8, 9, 10, 9, 9, 9, 9, 9, 10, 8,
9, 10, 10, 10, 10, 10, 9, 10, 11, 10,
10, 10, 10, 10, 11, 9, 10, 11, 11, 11,
11, 11, 10, 11, 12, 11, 11, 11, 11, 11,
12, 10, 11, 12, 12, 12, 12, 12, 11, 12,
13, 12, 12, 12, 12, 12, 13, 11, 12, 13,
13, 13, 13, 13, 12, 13, 14, 13, 13, 13,
13, 13, 14, 12, 13, 14, 14, 14, 14, 14,
13, 14, 15, 14, 14, 14, 14, 14, 15, 13,
14, 15, 15, 15, 15, 15, 14, 15, 16, 15,
15, 15, 15, 15, 16, 14, 15, 16, 16, 16,
16, 16, 15, 16, 17, 16, 16, 16, 16, 16,
17, 15, 16, 17, 17, 17, 17, 17, 16, 17,
18, 17, 17, 17, 17, 17, 18, 16, 17, 18,
18, 18, 18, 18, 17, 18, 19, 18, 18, 18,
18, 18, 19, 17, 18, 19, 19, 19, 19, 19,
18, 19, 20, 19, 19, 19, 19, 19, 20, 18,
19, 20, 20, 20, 20, 20, 19, 20, 21, 20,
20, 20, 20, 20, 21, 19, 20, 21, 21, 21,
21, 21, 20, 21, 22, 21, 21, 21, 21, 21,
22, 20, 21, 22, 22, 22, 22, 22, 21, 22,
23, 22, 22, 22, 22, 22, 23, 21, 22, 23,
23, 23, 23, 23, 22, 23, 24, 23, 23, 23,
23, 23, 24, 22, 23, 24, 24, 24, 24, 24,
23, 24, 25, 24, 24, 24, 24, 24, 25, 23,
24, 25, 25, 25, 25, 25, 24, 25, 26, 25,
25, 25, 25, 25, 26, 24, 25, 26, 26, 26,
26, 26, 25, 26, 27, 26, 26, 26, 26, 26,
27, 25, 26, 27, 27, 27, 27, 27, 26, 27,
28, 27, 27, 27, 27, 27, 28, 26, 27, 28,
28, 28, 28, 28, 27, 28, 29, 28, 28, 28,
28, 28, 29, 27, 28, 29, 29, 29, 29, 29,
28, 29, 30, 29, 29, 29, 29, 29, 30, 28,
29, 30, 30, 30, 30, 30, 29, 30, 31, 30,
30, 30, 30, 30, 31, 29, 30, 31, 31, 31,
31, 31, 30, 31, 32, 31, 31, 31, 31, 31,
32, 30, 31, 32, 32, 32, 32, 32, 31, 32,
33, 32, 32, 32, 32, 32, 33, 31, 32, 33,
33, 33, 33, 33, 32, 33, 34, 33, 33, 33,
33, 33, 34, 32, 33,
};
#endif /* __GIMP_IMAGE_CONVERT_FSDITHER_H__ */
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