/*
  Simple DirectMedia Layer
  Copyright (C) 1997-2022 Sam Lantinga <slouken@libsdl.org>

  This software is provided 'as-is', without any express or implied
  warranty.  In no event will the authors be held liable for any damages
  arising from the use of this software.

  Permission is granted to anyone to use this software for any purpose,
  including commercial applications, and to alter it and redistribute it
  freely, subject to the following restrictions:

  1. The origin of this software must not be misrepresented; you must not
     claim that you wrote the original software. If you use this software
     in a product, an acknowledgment in the product documentation would be
     appreciated but is not required.
  2. Altered source versions must be plainly marked as such, and must not be
     misrepresented as being the original software.
  3. This notice may not be removed or altered from any source distribution.
*/

/* Lookup tables to expand partial bytes to the full 0..255 range */

static Uint8 lookup_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
};
static Uint8 lookup_1[] = {
	0, 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32, 34, 36,
	38, 40, 42, 44, 46, 48, 50, 52, 54, 56, 58, 60, 62, 64, 66, 68, 70, 72,
	74, 76, 78, 80, 82, 84, 86, 88, 90, 92, 94, 96, 98, 100, 102, 104, 106,
	108, 110, 112, 114, 116, 118, 120, 122, 124, 126, 128, 130, 132, 134,
	136, 138, 140, 142, 144, 146, 148, 150, 152, 154, 156, 158, 160, 162,
	164, 166, 168, 170, 172, 174, 176, 178, 180, 182, 184, 186, 188, 190,
	192, 194, 196, 198, 200, 202, 204, 206, 208, 210, 212, 214, 216, 218,
	220, 222, 224, 226, 228, 230, 232, 234, 236, 238, 240, 242, 244, 246,
	248, 250, 252, 255
};
static Uint8 lookup_2[] = {
	0, 4, 8, 12, 16, 20, 24, 28, 32, 36, 40, 44, 48, 52, 56, 60, 64, 68,
	72, 76, 80, 85, 89, 93, 97, 101, 105, 109, 113, 117, 121, 125, 129, 133,
	137, 141, 145, 149, 153, 157, 161, 165, 170, 174, 178, 182, 186, 190,
	194, 198, 202, 206, 210, 214, 218, 222, 226, 230, 234, 238, 242, 246,
	250, 255
};
static Uint8 lookup_3[] = {
	0, 8, 16, 24, 32, 41, 49, 57, 65, 74, 82, 90, 98, 106, 115, 123, 131,
	139, 148, 156, 164, 172, 180, 189, 197, 205, 213, 222, 230, 238, 246,
	255
};
static Uint8 lookup_4[] = {
	0, 17, 34, 51, 68, 85, 102, 119, 136, 153, 170, 187, 204, 221, 238, 255
};
static Uint8 lookup_5[] = {
	0, 36, 72, 109, 145, 182, 218, 255
};
static Uint8 lookup_6[] = {
	0, 85, 170, 255
};
static Uint8 lookup_7[] = {
	0, 255
};
static Uint8 lookup_8[] = {
	255
};

static Uint8 *agExpandByte8[9] = {
    lookup_0,
    lookup_1,
    lookup_2,
    lookup_3,
    lookup_4,
    lookup_5,
    lookup_6,
    lookup_7,
    lookup_8
};