1 ! Copyright (C) 2006 Chris Double.
2 ! See http://factorcode.org/license.txt for BSD license.
30 "uchar" require-c-array
33 TUPLE: space-invaders < cpu port1 port2i port2o port3o port4lo port4hi port5o bitmap sounds looping? ;
34 CONSTANT: game-width 224
35 CONSTANT: game-height 256
37 : make-opengl-bitmap ( -- array )
38 game-height game-width 3 * * uchar <c-array> ;
40 : bitmap-index ( point -- index )
42 first2 game-width 3 * * swap 3 * + ;
44 : set-bitmap-pixel ( color point array -- )
45 #! 'color' is a {r g b}. Point is {x y}.
46 [ bitmap-index ] dip ! color index array
47 [ [ first ] 2dip set-nth ] 3keep
48 [ [ second ] 2dip [ 1 + ] dip set-nth ] 3keep
49 [ third ] 2dip [ 2 + ] dip set-nth ;
51 : get-bitmap-pixel ( point array -- color )
52 #! Point is a {x y}. color is a {r g b}
55 [ [ 1 + ] dip nth ] 2keep
56 [ 2 + ] dip nth 3array ;
58 CONSTANT: SOUND-SHOT 0
60 CONSTANT: SOUND-BASE-HIT 2
61 CONSTANT: SOUND-INVADER-HIT 3
62 CONSTANT: SOUND-WALK1 4
63 CONSTANT: SOUND-WALK2 5
64 CONSTANT: SOUND-WALK3 6
65 CONSTANT: SOUND-WALK4 7
66 CONSTANT: SOUND-UFO-HIT 8
68 : init-sound ( index cpu filename -- )
69 swapd [ sounds>> nth AL_BUFFER ] dip
70 create-buffer-from-wav set-source-param ;
72 : init-sounds ( cpu -- )
74 [ 9 gen-sources swap (>>sounds) ] keep
75 [ SOUND-SHOT "resource:extra/space-invaders/resources/Shot.wav" init-sound ] keep
76 [ SOUND-UFO "resource:extra/space-invaders/resources/Ufo.wav" init-sound ] keep
77 [ sounds>> SOUND-UFO swap nth AL_LOOPING AL_TRUE set-source-param ] keep
78 [ SOUND-BASE-HIT "resource:extra/space-invaders/resources/BaseHit.wav" init-sound ] keep
79 [ SOUND-INVADER-HIT "resource:extra/space-invaders/resources/InvHit.wav" init-sound ] keep
80 [ SOUND-WALK1 "resource:extra/space-invaders/resources/Walk1.wav" init-sound ] keep
81 [ SOUND-WALK2 "resource:extra/space-invaders/resources/Walk2.wav" init-sound ] keep
82 [ SOUND-WALK3 "resource:extra/space-invaders/resources/Walk3.wav" init-sound ] keep
83 [ SOUND-WALK4 "resource:extra/space-invaders/resources/Walk4.wav" init-sound ] keep
84 [ SOUND-UFO-HIT "resource:extra/space-invaders/resources/UfoHit.wav" init-sound ] keep
87 : <space-invaders> ( -- cpu )
89 make-opengl-bitmap over (>>bitmap)
93 : play-invaders-sound ( cpu sound -- )
94 swap sounds>> nth source-play ;
96 : stop-invaders-sound ( cpu sound -- )
97 swap sounds>> nth source-stop ;
99 : read-port1 ( cpu -- byte )
100 #! Port 1 maps the keys for space invaders
102 #! Bit 1 = two players button
103 #! Bit 2 = one player button
104 #! Bit 4 = player one fire
105 #! Bit 5 = player one left
106 #! Bit 6 = player one right
107 [ port1>> dup HEX: FE bitand ] keep
110 : read-port2 ( cpu -- byte )
111 #! Port 2 maps player 2 controls and dip switches
112 #! Bit 0,1 = number of ships
113 #! Bit 2 = mode (1=easy, 0=hard)
114 #! Bit 4 = player two fire
115 #! Bit 5 = player two left
116 #! Bit 6 = player two right
117 #! Bit 7 = show or hide coin info
118 [ port2i>> HEX: 8F bitand ] keep
119 port1>> HEX: 70 bitand bitor ;
121 : read-port3 ( cpu -- byte )
122 #! Used to compute a special formula
123 [ port4hi>> 8 shift ] keep
124 [ port4lo>> bitor ] keep
125 port2o>> shift -8 shift HEX: FF bitand ;
127 M: space-invaders read-port ( port cpu -- byte )
128 #! Read a byte from the hardware port. 'port' should
129 #! be an 8-bit value.
137 : write-port2 ( value cpu -- )
138 #! Setting this value affects the value read from port 3
141 : bit-newly-set? ( old-value new-value bit -- bool )
142 tuck bit? [ bit? not ] dip and ;
144 : port3-newly-set? ( new-value cpu bit -- bool )
145 [ port3o>> swap ] dip bit-newly-set? ;
147 : port5-newly-set? ( new-value cpu bit -- bool )
148 [ port5o>> swap ] dip bit-newly-set? ;
150 : write-port3 ( value cpu -- )
151 #! Connected to the sound hardware
152 #! Bit 0 = spaceship sound (looped)
154 #! Bit 2 = Your ship hit
155 #! Bit 3 = Invader hit
156 #! Bit 4 = Extended play sound
157 over 0 bit? over looping?>> not and [
158 dup SOUND-UFO play-invaders-sound
161 over 0 bit? not over looping?>> and [
162 dup SOUND-UFO stop-invaders-sound
165 2dup 0 port3-newly-set? [ dup SOUND-UFO play-invaders-sound ] when
166 2dup 1 port3-newly-set? [ dup SOUND-SHOT play-invaders-sound ] when
167 2dup 2 port3-newly-set? [ dup SOUND-BASE-HIT play-invaders-sound ] when
168 2dup 3 port3-newly-set? [ dup SOUND-INVADER-HIT play-invaders-sound ] when
171 : write-port4 ( value cpu -- )
172 #! Affects the value returned by reading port 3
177 : write-port5 ( value cpu -- )
179 #! Bit 0 = invaders sound 1
180 #! Bit 1 = invaders sound 2
181 #! Bit 2 = invaders sound 3
182 #! Bit 3 = invaders sound 4
183 #! Bit 4 = spaceship hit
184 #! Bit 5 = amplifier enabled/disabled
185 2dup 0 port5-newly-set? [ dup SOUND-WALK1 play-invaders-sound ] when
186 2dup 1 port5-newly-set? [ dup SOUND-WALK2 play-invaders-sound ] when
187 2dup 2 port5-newly-set? [ dup SOUND-WALK3 play-invaders-sound ] when
188 2dup 3 port5-newly-set? [ dup SOUND-WALK4 play-invaders-sound ] when
189 2dup 4 port5-newly-set? [ dup SOUND-UFO-HIT play-invaders-sound ] when
192 M: space-invaders write-port ( value port cpu -- )
193 #! Write a byte to the hardware port, where 'port' is
196 { 2 [ write-port2 ] }
197 { 3 [ write-port3 ] }
198 { 4 [ write-port4 ] }
199 { 5 [ write-port5 ] }
203 M: space-invaders reset ( cpu -- )
214 : gui-step ( cpu -- )
215 [ read-instruction ] keep ! n cpu
216 over get-cycles over inc-cycles
217 [ swap instructions nth call( cpu -- ) ] keep
218 [ pc>> HEX: FFFF bitand ] keep
221 : gui-frame/2 ( cpu -- )
224 over 16667 < [ ! cycles cpu
227 [ [ 16667 - ] dip (>>cycles) ] keep
228 dup last-interrupt>> HEX: 10 = [
229 HEX: 08 over (>>last-interrupt) HEX: 08 swap interrupt
231 HEX: 10 over (>>last-interrupt) HEX: 10 swap interrupt
235 : gui-frame ( cpu -- )
236 dup gui-frame/2 gui-frame/2 ;
238 : coin-down ( cpu -- )
239 [ port1>> 1 bitor ] keep (>>port1) ;
242 [ port1>> 255 1 - bitand ] keep (>>port1) ;
244 : player1-down ( cpu -- )
245 [ port1>> 4 bitor ] keep (>>port1) ;
247 : player1-up ( cpu -- )
248 [ port1>> 255 4 - bitand ] keep (>>port1) ;
250 : player2-down ( cpu -- )
251 [ port1>> 2 bitor ] keep (>>port1) ;
253 : player2-up ( cpu -- )
254 [ port1>> 255 2 - bitand ] keep (>>port1) ;
256 : fire-down ( cpu -- )
257 [ port1>> HEX: 10 bitor ] keep (>>port1) ;
260 [ port1>> 255 HEX: 10 - bitand ] keep (>>port1) ;
262 : left-down ( cpu -- )
263 [ port1>> HEX: 20 bitor ] keep (>>port1) ;
266 [ port1>> 255 HEX: 20 - bitand ] keep (>>port1) ;
268 : right-down ( cpu -- )
269 [ port1>> HEX: 40 bitor ] keep (>>port1) ;
271 : right-up ( cpu -- )
272 [ port1>> 255 HEX: 40 - bitand ] keep (>>port1) ;
275 TUPLE: invaders-gadget < gadget cpu quit? windowed? ;
278 { T{ key-down f f "ESC" } [ t over (>>quit?) dup windowed?>> [ close-window ] [ drop ] if ] }
279 { T{ key-down f f "BACKSPACE" } [ cpu>> coin-down ] }
280 { T{ key-up f f "BACKSPACE" } [ cpu>> coin-up ] }
281 { T{ key-down f f "1" } [ cpu>> player1-down ] }
282 { T{ key-up f f "1" } [ cpu>> player1-up ] }
283 { T{ key-down f f "2" } [ cpu>> player2-down ] }
284 { T{ key-up f f "2" } [ cpu>> player2-up ] }
285 { T{ key-down f f "UP" } [ cpu>> fire-down ] }
286 { T{ key-up f f "UP" } [ cpu>> fire-up ] }
287 { T{ key-down f f "LEFT" } [ cpu>> left-down ] }
288 { T{ key-up f f "LEFT" } [ cpu>> left-up ] }
289 { T{ key-down f f "RIGHT" } [ cpu>> right-down ] }
290 { T{ key-up f f "RIGHT" } [ cpu>> right-up ] }
293 : <invaders-gadget> ( cpu -- gadget )
298 M: invaders-gadget pref-dim* drop { 224 256 } ;
300 M: invaders-gadget draw-gadget* ( gadget -- )
303 [ 224 256 GL_RGB GL_UNSIGNED_BYTE ] dip
304 cpu>> bitmap>> glDrawPixels ;
306 CONSTANT: black { 0 0 0 }
307 CONSTANT: white { 255 255 255 }
308 CONSTANT: green { 0 255 0 }
309 CONSTANT: red { 255 0 0 }
311 : addr>xy ( addr -- point )
312 #! Convert video RAM address to base X Y value. point is a {x y}.
314 dup HEX: 1f bitand 8 * 255 swap - ! n y
315 swap -5 shift swap 2array ;
317 : plot-bitmap-pixel ( bitmap point color -- )
318 #! point is a {x y}. color is a {r g b}.
319 spin set-bitmap-pixel ;
321 : within ( n a b -- bool )
323 rot tuck swap <= [ swap >= ] dip and ;
325 : get-point-color ( point -- color )
326 #! Return the color to use for the given x/y position.
329 { [ dup 184 238 within pick 0 223 within and ] [ 2drop green ] }
330 { [ dup 240 247 within pick 16 133 within and ] [ 2drop green ] }
331 { [ dup 247 215 - 247 184 - within pick 0 223 within and ] [ 2drop red ] }
335 : plot-bitmap-bits ( bitmap point byte bit -- )
338 dup swapd -1 * shift 1 bitand 0 =
340 [ black ] [ dup get-point-color ] if
343 : do-bitmap-update ( bitmap value addr -- )
345 [ 0 plot-bitmap-bits ] 3keep
346 [ 1 plot-bitmap-bits ] 3keep
347 [ 2 plot-bitmap-bits ] 3keep
348 [ 3 plot-bitmap-bits ] 3keep
349 [ 4 plot-bitmap-bits ] 3keep
350 [ 5 plot-bitmap-bits ] 3keep
351 [ 6 plot-bitmap-bits ] 3keep
354 M: space-invaders update-video ( value addr cpu -- )
356 bitmap>> -rot do-bitmap-update
361 : sync-frame ( millis -- millis )
362 #! Sleep until the time for the next frame arrives.
363 1000 60 / >fixnum + system:millis - dup 0 >
364 [ milliseconds threads:sleep ] [ drop threads:yield ] if system:millis ;
366 : invaders-process ( millis gadget -- )
367 #! Run a space invaders gadget inside a
368 #! concurrent process. Messages can be sent to
369 #! signal key presses, etc.
374 [ cpu>> gui-frame ] keep
379 M: invaders-gadget graft* ( gadget -- )
380 dup cpu>> init-sounds
382 [ system:millis swap invaders-process ] curry
383 "Space invaders" threads:spawn drop ;
385 M: invaders-gadget ungraft* ( gadget -- )
388 : (run) ( title cpu rom-info -- )
389 over load-rom* <invaders-gadget> t >>windowed? swap open-window ;
392 { HEX: 0000 "invaders/invaders.h" }
393 { HEX: 0800 "invaders/invaders.g" }
394 { HEX: 1000 "invaders/invaders.f" }
395 { HEX: 1800 "invaders/invaders.e" }
400 "Space Invaders" <space-invaders> rom-info (run)