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-rw-r--r--app/core/gimpimage-convert-fsdither.h559
1 files changed, 559 insertions, 0 deletions
diff --git a/app/core/gimpimage-convert-fsdither.h b/app/core/gimpimage-convert-fsdither.h
new file mode 100644
index 0000000..ebd9800
--- /dev/null
+++ b/app/core/gimpimage-convert-fsdither.h
@@ -0,0 +1,559 @@
+/* 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__ */
generated by cgit v1.2.3 (git 2.39.1) at 2024-05-18 06:12:05 +0000