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
|
// Emacs style mode select -*- C++ -*-
//-----------------------------------------------------------------------------
//
// Copyright(C) 2005,2006 Simon Howard
//
// 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 2
// 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, write to the Free Software
// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
// 02111-1307, USA.
//
//-----------------------------------------------------------------------------
//
// Base interface that abstracts the text mode screen.
//
//-----------------------------------------------------------------------------
#ifndef TXT_MAIN_H
#define TXT_MAIN_H
// For the moment, txt_sdl.c is the only implementation of the base
// text mode screen API:
#include "txt_sdl.h"
// textscreen key values:
// Key values are difficult because we have to support multiple conflicting
// address spaces.
// First, Doom's key constants use 0-127 as ASCII and extra values from
// 128-255 to represent special keys. Second, mouse buttons are represented
// as buttons. Finally, we want to be able to support Unicode.
//
// So we define different ranges:
// 0-255: Doom key constants, including ASCII.
// 256-511: Mouse buttons and other reserved.
// >=512: Unicode values greater than 127 are offset up into this range.
// Special keypress values that correspond to mouse button clicks
#define TXT_MOUSE_BASE 256
#define TXT_MOUSE_LEFT (TXT_MOUSE_BASE + 0)
#define TXT_MOUSE_RIGHT (TXT_MOUSE_BASE + 1)
#define TXT_MOUSE_MIDDLE (TXT_MOUSE_BASE + 2)
#define TXT_MOUSE_SCROLLUP (TXT_MOUSE_BASE + 3)
#define TXT_MOUSE_SCROLLDOWN (TXT_MOUSE_BASE + 4)
#define TXT_MAX_MOUSE_BUTTONS 16
#define TXT_KEY_TO_MOUSE_BUTTON(x) \
( (x) >= TXT_MOUSE_BASE \
&& (x) < TXT_MOUSE_BASE + TXT_MAX_MOUSE_BUTTONS ? \
(x) - TXT_MOUSE_BASE : -1 )
// Unicode offset. Unicode values from 128 onwards are offset up into
// this range, so TXT_UNICODE_BASE = Unicode character #128, and so on.
#define TXT_UNICODE_BASE 512
// Convert a key value to a Unicode character:
#define TXT_KEY_TO_UNICODE(x) \
( (x) < 128 ? (x) : \
(x) >= TXT_UNICODE_BASE ? ((x) - TXT_UNICODE_BASE + 128) : 0 )
// Screen size
#define TXT_SCREEN_W 80
#define TXT_SCREEN_H 25
#define TXT_COLOR_BLINKING (1 << 3)
typedef enum
{
TXT_COLOR_BLACK,
TXT_COLOR_BLUE,
TXT_COLOR_GREEN,
TXT_COLOR_CYAN,
TXT_COLOR_RED,
TXT_COLOR_MAGENTA,
TXT_COLOR_BROWN,
TXT_COLOR_GREY,
TXT_COLOR_DARK_GREY,
TXT_COLOR_BRIGHT_BLUE,
TXT_COLOR_BRIGHT_GREEN,
TXT_COLOR_BRIGHT_CYAN,
TXT_COLOR_BRIGHT_RED,
TXT_COLOR_BRIGHT_MAGENTA,
TXT_COLOR_YELLOW,
TXT_COLOR_BRIGHT_WHITE,
} txt_color_t;
// Modifier keys.
typedef enum
{
TXT_MOD_SHIFT,
TXT_MOD_CTRL,
TXT_MOD_ALT,
TXT_NUM_MODIFIERS
} txt_modifier_t;
// Initialize the screen
// Returns 1 if successful, 0 if failed.
int TXT_Init(void);
// Shut down text mode emulation
void TXT_Shutdown(void);
// Get a pointer to the buffer containing the raw screen data.
unsigned char *TXT_GetScreenData(void);
// Update an area of the screen
void TXT_UpdateScreenArea(int x, int y, int w, int h);
// Update the whole screen
void TXT_UpdateScreen(void);
// Read a character from the keyboard
int TXT_GetChar(void);
// Read the current state of modifier keys that are held down.
int TXT_GetModifierState(txt_modifier_t mod);
// Provides a short description of a key code, placing into the
// provided buffer.
void TXT_GetKeyDescription(int key, char *buf);
// Retrieve the current position of the mouse
void TXT_GetMousePosition(int *x, int *y);
// Sleep until an event is received or the screen needs updating
// Optional timeout in ms (timeout == 0 : sleep forever)
void TXT_Sleep(int timeout);
// Controls whether keys are returned from TXT_GetChar based on keyboard
// mapping, or raw key code.
void TXT_EnableKeyMapping(int enable);
// Set the window title of the window containing the text mode screen
void TXT_SetWindowTitle(char *title);
#endif /* #ifndef TXT_MAIN_H */
|
