-
Notifications
You must be signed in to change notification settings - Fork 1
/
link.scm
326 lines (254 loc) · 8.08 KB
/
link.scm
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
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
(c-declare #<<c-declare-end
#include "testlib.h"
c-declare-end
)
(load "scmlib")
(##heartbeat-interval-set! 0.5)
;(##include "scmlib.scm")
(c-define-type ImageResource (pointer (struct "ImageResource_")))
(c-define-type Clock (pointer (struct "Clock_")))
(c-define-type Sprite (pointer (struct "Sprite_")))
(c-define-type SpriteList (pointer (struct "SpriteList_")))
(c-define-type InputState (pointer (struct "InputState_")))
(define (->fixnum x)
(cond
((fixnum? x) x)
((flonum? x) (##flonum->fixnum x))
(else (inexact->exact x))))
(define ->flonum exact->inexact)
(define image-load-internal
(c-lambda (nonnull-char-string)
ImageResource
"image_load"))
(define image-width
(c-lambda (ImageResource)
int
"image_width"))
(define image-height
(c-lambda (ImageResource)
int
"image_height"))
(define images-free
(c-lambda ()
void
"images_free"))
(define clock-free
(c-lambda (Clock)
void
"clock_free"))
(define clock-make
(c-lambda ()
Clock
"clock_make"))
(define clock-time-scale
(c-lambda (Clock)
float
"___result = ___arg1->time_scale;"))
(define clock-time-scale-set!
(c-lambda (Clock float)
void
"___arg1->time_scale = ___arg2;"))
(define (comp2 f g)
(lambda (item x) (f item (g x))))
(define (compose f g)
(lambda (x) (f (g x))))
(define %clock-update
(c-lambda (Clock float)
float
"clock_update"))
(define clock-update (comp2 %clock-update ->flonum))
(define clock-time
(c-lambda (Clock)
long
"clock_time"))
(define %cycles->seconds
(c-lambda (long)
float
"clock_cycles_to_seconds"))
(define %seconds->cycles
(c-lambda (float)
long
"clock_seconds_to_cycles"))
(define input-leftright
(c-lambda (InputState)
float
"___result = ___arg1->leftright;"))
(define input-updown
(c-lambda (InputState)
float
"___result = ___arg1->updown;"))
(define %input-action1
(c-lambda (InputState)
int
"___result = ___arg1->action1;"))
(define (input-action1 input)
(= 1 (%input-action1 input)))
(define cycles->seconds (compose %cycles->seconds ->fixnum))
(define seconds->cycles (compose %seconds->cycles ->flonum))
(define *screen-width* #f)
(define *screen-height* #f)
(define frame/make-sprite
(c-lambda ()
Sprite
"frame_make_sprite"))
(define sprite-resource-set!
(c-lambda (Sprite ImageResource)
void
"___arg1->resource = ___arg2;"))
(define %sprite-x-set!
(c-lambda (Sprite float)
void
"___arg1->displayX = ___arg2;"))
(define %sprite-y-set!
(c-lambda (Sprite float)
void
"___arg1->displayY = ___arg2;"))
(define %sprite-origin-x-set!
(c-lambda (Sprite float)
void
"___arg1->originX = ___arg2;"))
(define %sprite-origin-y-set!
(c-lambda (Sprite float)
void
"___arg1->originY = ___arg2;"))
(define %sprite-angle-set!
(c-lambda (Sprite float)
void
"___arg1->angle = ___arg2;"))
(define %sprite-width-set!
(c-lambda (Sprite float)
void
"___arg1->w = ___arg2;"))
(define %sprite-height-set!
(c-lambda (Sprite float)
void
"___arg1->h = ___arg2;"))
(define sprite-x-set! (comp2 %sprite-x-set! ->flonum))
(define sprite-y-set! (comp2 %sprite-y-set! ->flonum))
(define sprite-origin-x-set! (comp2 %sprite-origin-x-set! ->flonum))
(define sprite-origin-y-set! (comp2 %sprite-origin-y-set! ->flonum))
(define sprite-angle-set! (comp2 %sprite-angle-set! ->flonum))
(define sprite-width-set! (comp2 %sprite-width-set! ->flonum))
(define sprite-height-set! (comp2 %sprite-height-set! ->flonum))
(define %sprite-parms-set!
;; sprite image x y cx cy angle width height
(c-lambda (Sprite ImageResource float float float float float float float)
void
"
___arg1->resource = ___arg2;
___arg1->displayX = ___arg3;
___arg1->displayY = ___arg4;
___arg1->originX = ___arg5;
___arg1->originY = ___arg6;
___arg1->angle = ___arg7;
___arg1->w = ___arg8;
___arg1->h = ___arg9;
"))
(define (sprite-parms-set! sprite img x y cx cy angle width height)
(%sprite-parms-set! sprite img
(->flonum x) (->flonum y)
(->flonum cx) (->flonum cy)
(->flonum angle)
(->flonum width) (->flonum height)))
(define %sprite-coords-set!
;; u0, v0, u1, v1
(c-lambda (Sprite float float float float)
void
"
___arg1->u0 = ___arg2;
___arg1->v0 = ___arg3;
___arg1->u1 = ___arg4;
___arg1->v1 = ___arg5;"))
(define (sprite-coords-set! sprite u0 v0 u1 v1)
(%sprite-coords-set! sprite
(->flonum u0) (->flonum v0)
(->flonum u1) (->flonum v1)))
(define frame/spritelist-append
(c-lambda (SpriteList Sprite)
SpriteList
"frame_spritelist_append"))
(define spritelist-enqueue-for-screen!
(c-lambda (SpriteList)
void
"spritelist_enqueue_for_screen"))
;;; audio
(c-define-type Sampler (pointer (struct "Sampler_")))
(define %sinsampler-make
(c-lambda (long long float float float)
Sampler
"sinsampler_make"))
(define (sinsampler-make start duration freq amp phase)
(%sinsampler-make (->fixnum start)
(->fixnum duration)
(->flonum freq)
(->flonum amp)
(->flonum phase)))
(define %sawsampler-make
(c-lambda (long long float float float)
Sampler
"sawsampler_make"))
(define (sawsampler-make start duration freq amp phase)
(%sawsampler-make (->fixnum start)
(->fixnum duration)
(->flonum freq)
(->flonum amp)
(->flonum phase)))
(define *sample-freq* ((c-lambda () long "___result = SAMPLE_FREQ;")))
(define *num-channels* 2)
(define (seconds->samples seconds)
(* *num-channels* *sample-freq* seconds))
(define audio-current-sample
(c-lambda ()
long
"audio_current_sample"))
(define audio-enqueue
(c-lambda (Sampler)
void
"audio_enqueue"))
;;; game lifecycle
(define *game-clock* #f)
;; wild hack to keep gambit from trying to kill our process before
;; we're done. We use a continuation to send the gambit exit system
;; off into space after we've told the C side that we need to be torn
;; down when it's ready. Seems to only work on non-arm. Call exit
;; instead of giving the repl a ,q
(define ##exit-cc-hack #f)
(call/cc (lambda (cc) (set! ##exit-cc-hack cc)))
(define (exit)
(terminate))
(define quit exit)
(c-define (scm-init) () void "scm_init" ""
(set! *game-clock* (clock-make))
(##add-exit-job!
(lambda ()
(exit)
(##exit-cc-hack)))
(set! *screen-width*
((c-lambda () int "___result = screen_width;")))
(set! *screen-height*
((c-lambda () int "___result = screen_height;")))
;(clock-time-scale-set! *game-clock* 0.2)
(display "initializing") (newline)
(ensure-resources)
(thread-start!
(make-thread
(lambda ()
(##repl-debug-main)))))
;;; resource lifecycle
(define *resources* (make-table))
(define (image-load path)
(let ((resource (table-ref *resources* path #f)))
(if resource resource
(begin
(let ((new-resource (image-load-internal path)))
(table-set! *resources* path new-resource)
new-resource)))))
(c-define (resources-released) () void "resources_released" ""
(set! *resources* (make-table)))
;;; gameloop
(c-define (step msecs input) (int InputState) void "step" ""
(update-view (clock-update *game-clock* (/ msecs 1000.0)) input))
;;; termination
;; c tells us to terminate
(c-define (terminate) () void "terminate" ""
(display "terminating") (newline))