4 WARNING: VERY EXPERIMENTAL
6 This is Linux terminal implementation of the game front end. If you replace
7 the input methods, it will most likely run in other terminals as well. This
8 needs root priviledges (sudo) to work (because we need to read keyboard and
9 mouse inputs)! This frontend is more of an experiment, don't expect it to work
10 perfectly and everywhere.
12 by Miloslav Ciz (drummyfish), 2019
14 Released under CC0 1.0 (https://creativecommons.org/publicdomain/zero/1.0/)
15 plus a waiver of all other intellectual property. The goal of this work is
16 be and remain completely in the public domain forever, available for any use
20 #ifndef USE_LINUX_FRAMEBUFFER
21 #define USE_LINUX_FRAMEBUFFER 0
24 // IMPORTANT: You must set these files correctly:
25 #define DEV_KEYBOARD "/dev/input/event3"
26 #define DEV_MOUSE "/dev/input/event1"
27 #define DEV_TTY "/dev/tty3"
28 #define DEV_FRAMBUFFER "/dev/fb0"
34 #include <linux/input.h>
39 #include "smallinput.h"
41 #if USE_LINUX_FRAMEBUFFER
46 #include <sys/ioctl.h>
49 #if USE_LINUX_FRAMEBUFFER
50 #define SFG_SCREEN_RESOLUTION_X 640
51 #define SFG_SCREEN_RESOLUTION_Y 480
53 #define SFG_SCREEN_RESOLUTION_X 127
54 #define SFG_SCREEN_RESOLUTION_Y 42
57 #define SFG_DITHERED_SHADOW 1
62 #define SCREENSIZE ((SFG_SCREEN_RESOLUTION_X + 1) * SFG_SCREEN_RESOLUTION_Y + 1)
64 char screen
[SCREENSIZE
];
65 uint8_t *screenUnsigned
= (uint8_t *) screen
;
67 const char shades
[] = // adjust according to your terminal
69 ' ','.','-',':','\\','h','M','@', // grey
70 '`','.',',',';','/','r','=','n' // non-grey
78 gettimeofday(&now
, NULL
);
79 return now
.tv_sec
* 1000 + now
.tv_usec
/ 1000;
82 void SFG_setPixel(uint16_t x
, uint16_t y
, uint8_t colorIndex
)
84 #if USE_LINUX_FRAMEBUFFER
85 screenUnsigned
[y
* SFG_SCREEN_RESOLUTION_X
+ x
] =
88 screen
[y
* (SFG_SCREEN_RESOLUTION_X
+ 1) + x
] =
89 shades
[(colorIndex
> 7) * 8 + colorIndex
% 8];
93 uint32_t SFG_getTimeMs()
95 return getTime() - timeStart
;
98 void SFG_save(uint8_t data
[SFG_SAVE_SIZE
])
102 uint8_t SFG_load(uint8_t data
[SFG_SAVE_SIZE
])
107 void SFG_sleepMs(uint16_t timeMs
)
109 usleep(timeMs
* 1000);
112 void SFG_getMouseOffset(int16_t *x
, int16_t *y
)
116 input_getMousePos(&a
,&b
);
119 input_setMousePos(0,0);
122 void SFG_processEvent(uint8_t event
, uint8_t data
)
126 int8_t SFG_keyPressed(uint8_t key
)
130 case SFG_KEY_UP
: return input_getKey('w') || input_getKey(SMALLINPUT_ARROW_UP
); break;
131 case SFG_KEY_RIGHT
: return input_getKey('d') || input_getKey(SMALLINPUT_ARROW_RIGHT
); break;
132 case SFG_KEY_DOWN
: return input_getKey('s') || input_getKey(SMALLINPUT_ARROW_DOWN
); break;
133 case SFG_KEY_LEFT
: return input_getKey('a') || input_getKey(SMALLINPUT_ARROW_LEFT
); break;
134 case SFG_KEY_A
: return input_getKey('j') || input_getKey(SMALLINPUT_RETURN
) || input_getKey(SMALLINPUT_MOUSE_L
); break;
135 case SFG_KEY_B
: return input_getKey('k') || input_getKey(SMALLINPUT_CTRL
); break;
136 case SFG_KEY_C
: return input_getKey('l'); break;
137 case SFG_KEY_MAP
: return input_getKey(SMALLINPUT_TAB
); break;
138 case SFG_KEY_JUMP
: return input_getKey(' '); break;
139 case SFG_KEY_MENU
: return input_getKey(SMALLINPUT_ESCAPE
); break;
140 case SFG_KEY_NEXT_WEAPON
: return input_getKey('2'); break;
141 case SFG_KEY_PREVIOUS_WEAPON
: return input_getKey('1'); break;
142 case SFG_KEY_CYCLE_WEAPON
: return input_getKey('f'); break;
143 case SFG_KEY_TOGGLE_FREELOOK
: return input_getKey(SMALLINPUT_MOUSE_R
); break;
144 default: return 0; break;
148 void SFG_setMusic(uint8_t value
)
152 void SFG_playSound(uint8_t soundIndex
, uint8_t volume
)
158 void handleSignal(int signal
)
160 #if !USE_LINUX_FRAMEBUFFER
161 puts("\033[?25h"); // show cursor
168 signal(SIGINT
,handleSignal
);
169 signal(SIGQUIT
,handleSignal
);
170 signal(SIGTERM
,handleSignal
);
172 timeStart
= getTime();
174 input_init(SMALLINPUT_MODE_NORMAL
,0,0);
177 screen
[SCREENSIZE
- 1] = 0; // string terminator
179 #if USE_LINUX_FRAMEBUFFER
181 #define CHECK(w,err,msg)\
182 if ((w) == (err)) { puts(msg); return 1; }
184 int tty
= open(DEV_TTY
,O_RDWR
);
185 CHECK(tty
,-1,"couldn't open TTY device")
187 CHECK(ioctl(tty
,KDSETMODE
,KD_GRAPHICS
),-1,"couldn't set graphic mode")
189 int fb
= open(DEV_FRAMBUFFER
,O_RDWR
);
190 CHECK(fb
,-1,"couldn't open framebuffer device")
192 struct fb_fix_screeninfo fixInfo
;
193 struct fb_var_screeninfo varInfo
;
195 CHECK(ioctl(fb
,FBIOGET_FSCREENINFO
,&fixInfo
),-1,"couldn't get fixInfo")
196 CHECK(ioctl(fb
,FBIOGET_VSCREENINFO
,&varInfo
),-1,"couldn't get varInfo")
198 int bpp
= varInfo
.bits_per_pixel
/ 8;
199 uint64_t screenSize
= varInfo
.xres
* varInfo
.yres
* bpp
;
201 char *fbScreen
= mmap(0,screenSize
,PROT_READ
| PROT_WRITE
,MAP_SHARED
,fb
,0);
203 CHECK(fbScreen
,MAP_FAILED
,"couldn't map framebuffer")
205 int r
= varInfo
.red
.offset
/ 8,
206 g
= varInfo
.green
.offset
/ 8,
207 b
= varInfo
.blue
.offset
/ 8,
208 t
= varInfo
.transp
.offset
/ 8;
211 for (uint16_t i
= 1; i
<= SFG_SCREEN_RESOLUTION_Y
; ++i
)
212 screen
[i
* (SFG_SCREEN_RESOLUTION_X
+ 1) - 1] = '\n';
214 setvbuf(stdout
, NULL
, _IOFBF
, SCREENSIZE
+ 1);
216 for (uint8_t i
= 0; i
< 100; ++i
) // clear screen
219 puts("\033[?25l"); // hide cursor
226 #if USE_LINUX_FRAMEBUFFER
230 int linePad
= fixInfo
.line_length
- SFG_SCREEN_RESOLUTION_X
* bpp
;
234 for (int y
= 0; y
< SFG_SCREEN_RESOLUTION_Y
; ++y
)
236 for (int x
= 0; x
< SFG_SCREEN_RESOLUTION_X
; ++x
)
238 // inefficient, should be a precomputed RGB32 palette
239 uint16_t c
= paletteRGB565
[screenUnsigned
[index
]];
241 *(p
+ b
) = (c
<< 3) & 0xf8;
242 *(p
+ g
) = (c
>> 3) & 0xfc;
243 *(p
+ r
) = (c
>> 8) & 0xf8;
252 puts("\033[0;0H"); // move cursor to 0;0
257 if (!SFG_mainLoopBody())
260 // if (SFG_game.frame > 1000) break; // uncomment for testing, prevents locking
266 #if USE_LINUX_FRAMEBUFFER
267 munmap(screen
,screenSize
);
269 ioctl(tty
,KDSETMODE
,KD_TEXT
); // set back to text mode
274 puts("\033[?25h"); // show cursor