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macega.h
1 /* ScummVM - Graphic Adventure Engine
2  *
3  * ScummVM is the legal property of its developers, whose names
4  * are too numerous to list here. Please refer to the COPYRIGHT
5  * file distributed with this source distribution.
6  *
7  * This program is free software: you can redistribute it and/or modify
8  * it under the terms of the GNU General Public License as published by
9  * the Free Software Foundation, either version 3 of the License, or
10  * (at your option) any later version.
11  *
12  * This program is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15  * GNU General Public License for more details.
16  *
17  * You should have received a copy of the GNU General Public License
18  * along with this program. If not, see <http://www.gnu.org/licenses/>.
19  */
20 
21 #ifndef GRAPHICS_MACEGA_H
22 #define GRAPHICS_MACEGA_H
23 
24 namespace Graphics {
25 
26 // Each color has its own 2x2 dithering pattern. This array remaps them to the
27 // color indexes for black and white. The order of the pixels is upper left,
28 // upper right, lower left, lower right. I don't know if this is the standard
29 // method, but it does seem to be what LucasArts used so maybe it's useful for
30 // other games as well.
31 //
32 // One obvious candidate would be the Mac AGI games, though looking at
33 // screenshots makes me suspect that they used 3x2 pixels for each color.
34 
35 const byte macEGADither[16][4] = {
36  { 0, 0, 0, 0 }, // Black
37  { 0, 0, 0, 15 }, // Blue
38  { 0, 0, 15, 0 }, // Green
39  { 0, 0, 15, 15 }, // Cyan
40  { 0, 15, 0, 0 }, // Red
41  { 0, 15, 0, 15 }, // Magenta
42  { 0, 15, 15, 0 }, // Brown
43  { 0, 15, 15, 15 }, // Light Gray
44  { 15, 0, 0, 0 }, // Dark Gray
45  { 15, 0, 0, 15 }, // Bright Blue
46  { 15, 0, 15, 0 }, // Bright Green
47  { 15, 0, 15, 15 }, // Bright Cyan
48  { 15, 15, 0, 0 }, // Bright Red
49  { 15, 15, 0, 15 }, // Bright Magenta
50  { 15, 15, 15, 0 }, // Bright Yellow
51  { 15, 15, 15, 15 } // White
52 };
53 
54 } // end of namespace Graphics
55 
56 #endif // GRAPHICS_MACEGA_H
Graphics
Definition: formatinfo.h:28