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1 | ;;; figl |
2 | ;;; Copyright (C) 2013 Daniel Hartwig <mandyke@gmail.com> | |
3 | ;;; | |
4 | ;;; Figl is free software: you can redistribute it and/or modify it | |
5 | ;;; under the terms of the GNU Lesser General Public License as | |
6 | ;;; published by the Free Software Foundation, either version 3 of the | |
7 | ;;; License, or (at your option) any later version. | |
8 | ;;; | |
9 | ;;; Figl is distributed in the hope that it will be useful, but WITHOUT | |
10 | ;;; ANY WARRANTY; without even the implied warranty of MERCHANTABILITY | |
11 | ;;; or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General | |
12 | ;;; Public License for more details. | |
13 | ;;; | |
14 | ;;; You should have received a copy of the GNU Lesser General Public | |
15 | ;;; License along with this program. If not, see | |
16 | ;;; <http://www.gnu.org/licenses/>. | |
17 | ||
18 | ;;; Commentary: | |
19 | ;; | |
7100c070 | 20 | ;; OpenGL Utility Library (GLUT) binding. |
61ebde6d DH |
21 | ;; |
22 | ;;; Code: | |
23 | ||
24 | (define-module (figl glut) | |
7100c070 DH |
25 | #:use-module (figl contrib) |
26 | #:use-module ((figl glut low-level) #:renamer (symbol-prefix-proc '%)) | |
27 | #:use-module (figl glut enums) | |
61ebde6d | 28 | #:use-module (system foreign) |
7100c070 DH |
29 | #:use-module (srfi srfi-9) |
30 | #:use-module (srfi srfi-39)) ; parameter objects | |
31 | ||
32 | (module-use! (module-public-interface (current-module)) | |
33 | (resolve-interface '(figl glut enums))) | |
34 | ||
35 | ;;; | |
36 | ;;; 2 Initialization | |
37 | ;;; | |
61ebde6d DH |
38 | |
39 | ;; TODO: Most procedures should prevent themself from being called | |
40 | ;; before glut-init. | |
41 | ||
42 | (define glut-init? (make-parameter #f)) | |
43 | ||
44 | ;; Note the use of 'saved-c-strings' to keep a reference to all of the | |
45 | ;; C string buffers that we ever pass to 'glutInit'. This is important | |
46 | ;; because the glut docs specify that 'glutInit' wants the original | |
47 | ;; unmodified 'argv' passed to 'main', which means that it can assume | |
48 | ;; that the strings will never be freed. 'string->pointer' returns a C | |
49 | ;; string buffer managed by the garbage collector, which means that | |
50 | ;; the string may be freed unless the GC can see a pointer to the | |
51 | ;; _beginning_ of the string. | |
52 | (define glut-init | |
53 | (let ((saved-c-strings '())) | |
54 | (lambda (args) | |
55 | ;; Avoid calling init twice as GLUT will exit(). | |
56 | (unless (glut-init?) | |
57 | (let* ((num-args (length args)) | |
58 | (c-strings (map string->pointer args)) | |
59 | (argcp (make-c-struct (list int) | |
60 | (list num-args))) | |
61 | (argv (make-c-struct (make-list (+ 1 num-args) '*) | |
62 | (append c-strings | |
63 | (list %null-pointer))))) | |
64 | (set! saved-c-strings (append c-strings saved-c-strings)) | |
7100c070 | 65 | (%glutInit argcp argv) |
61ebde6d DH |
66 | (glut-init? #t) |
67 | (let ((argc (car (parse-c-struct argcp (list int))))) | |
68 | (map pointer->string | |
69 | (parse-c-struct argv | |
70 | (make-list argc '*))))))))) | |
7100c070 DH |
71 | |
72 | (export glut-init) | |
73 | ||
74 | (re-export (%glutInitWindowPosition . set-initial-window-position) | |
75 | (%glutInitWindowSize . set-initial-window-size) | |
76 | (%glutInitDisplayMode . set-initial-display-mode)) | |
77 | ||
78 | ;;; | |
79 | ;;; 3 Beginning Event Processing | |
80 | ;;; | |
81 | ||
82 | (re-export (%glutMainLoop . glut-main-loop)) | |
83 | ||
84 | \f | |
85 | ;;; | |
86 | ;;; 4 Window Management | |
87 | ;;; | |
88 | ||
89 | ;; Garbage collected windows are not automatically destroyed. Permit | |
90 | ;; them to continue living inside GLUT. | |
91 | ||
92 | (define-record-type window | |
93 | (%%make-window id live?) | |
94 | window? | |
95 | (id window-id) | |
96 | (live? window-live? set-window-live?!)) | |
97 | ||
98 | (define (assert-live-window! window) | |
99 | (unless (window-live? window) | |
100 | (error "window already destroyed" window))) | |
101 | ||
102 | (define (top-level-window? window) | |
103 | (not (window-parent window))) | |
104 | ||
105 | (define (sub-window? window) | |
106 | (and (window-parent window) | |
107 | #t)) | |
108 | ||
109 | (define (assert-top-level-window! window) | |
110 | (unless (top-level-window? window) | |
111 | (error "not a top-level window" window))) | |
112 | ||
113 | ;; Memoized so state requests can return the same object. | |
114 | (define %make-window (memoize %%make-window)) | |
115 | ||
116 | (define (make-window str) | |
117 | (let ((id (%glutCreateWindow str))) | |
118 | (%make-window id #t))) | |
119 | ||
120 | (define (make-sub-window window x y width height) | |
121 | (let ((id (%glutCreateSubWindow (window-id window) x y width height))) | |
122 | (%make-window id #t))) | |
123 | ||
124 | (define (current-window) | |
125 | (let ((ret (%glutGetWindow))) | |
126 | (and (not (zero? ret)) | |
127 | (%make-window ret #t)))) | |
128 | ||
129 | (define (set-current-window window) | |
130 | (assert-live-window! window) | |
131 | (let ((old (current-window))) | |
132 | (%glutSetWindow (window-id window)) | |
133 | old)) | |
134 | ||
135 | (define (destroy-window window) | |
136 | (set-window-live?! window #f) | |
137 | ;; TODO: Also mark sub-windows. | |
138 | (%glutDestroyWindow (window-id window))) | |
139 | ||
140 | ;; A short detour for some syntax forms, then most window procedures | |
141 | ;; operate on /either/ current-window or a specified window. | |
142 | ||
143 | (define (with-window* window thunk) | |
144 | (let* ((swap-windows (lambda () | |
145 | (set! window (set-current-window window))))) | |
146 | (dynamic-wind swap-windows thunk swap-windows))) | |
147 | ||
148 | ;; emacs: (put 'with-window 'scheme-indent-function 1) | |
149 | (define-syntax with-window | |
150 | (syntax-rules () | |
151 | ((_ window body1 body2 ...) | |
152 | (with-window* window (lambda () body1 body2 ...))))) | |
153 | ||
154 | ;; emacs: (put 'maybe-with-window 'scheme-indent-function 1) | |
155 | (define-syntax maybe-with-window | |
156 | (syntax-rules () | |
157 | ((_ window body1 body2 ...) | |
158 | (if (eqv? window #t) ; use current-window | |
159 | (begin | |
160 | body1 body2 ...) | |
161 | (with-window window | |
162 | (assert-live-window! window) | |
163 | body1 body2 ...))))) | |
164 | ||
165 | (export with-window*) | |
166 | ||
167 | (export-syntax with-window) | |
168 | ||
169 | ;; TODO: These post requests, and do not update the window parameters | |
170 | ;; immediately. Otherwise, names like set-window-position! may be | |
171 | ;; more appropriate on the Scheme side. | |
172 | ||
173 | (define (position-window window x y) | |
174 | (maybe-with-window window | |
175 | (%glutPositionWindow x y))) | |
176 | ||
177 | (define (reshape-window window width height) | |
178 | (maybe-with-window window | |
179 | (%glutReshapeWindow width height))) | |
180 | ||
181 | (define* (post-redisplay #:optional (window #t)) | |
182 | (maybe-with-window window | |
183 | (%glutPostRedisplay))) | |
184 | ||
185 | (define* (swap-buffers #:optional (window #t)) | |
186 | (maybe-with-window window | |
187 | (%glutSwapBuffers))) | |
188 | ||
189 | (define (full-screen window full-screen?) | |
190 | (if full-screen? | |
191 | (maybe-with-window window | |
192 | (%glutFullScreen)) | |
193 | (error "leaving full-screen not supported"))) | |
194 | ||
195 | (define* (show-window #:optional (window #t)) | |
196 | (maybe-with-window window | |
197 | (%glutShowWindow))) | |
198 | ||
199 | (define* (hide-window #:optional (window #t)) | |
200 | (maybe-with-window window | |
201 | (%glutHideWindow))) | |
202 | ||
203 | (define* (iconify-window #:optional (window #t)) | |
204 | (maybe-with-window window | |
205 | (%glutIconifyWindow))) | |
206 | ||
207 | (define (set-window-title! window str) | |
208 | (assert-top-level-window! (if (eqv? window #t) | |
209 | (current-window) | |
210 | window)) | |
211 | (maybe-with-window window | |
212 | (%glutSetWindowTitle str))) | |
213 | ||
214 | (define (set-window-icon-title! window str) | |
215 | (assert-top-level-window! (if (eqv? window #t) | |
216 | (current-window) | |
217 | window)) | |
218 | (maybe-with-window window | |
219 | (%glutSetIconTitle str))) | |
220 | ||
221 | (define (set-window-cursor! window cursor) | |
222 | (maybe-with-window window | |
223 | (%glutSetCursor cursor))) | |
224 | ||
225 | (export window? | |
226 | window-id | |
227 | top-level-window? | |
228 | sub-window? | |
229 | window-live? | |
230 | make-window | |
231 | make-sub-window | |
232 | current-window | |
233 | set-current-window | |
234 | destroy-window | |
235 | position-window | |
236 | reshape-window | |
237 | post-redisplay | |
238 | swap-buffers | |
239 | full-screen | |
240 | show-window | |
241 | hide-window | |
242 | iconify-window | |
243 | set-window-title! | |
244 | set-window-icon-title! | |
245 | set-window-cursor!) | |
246 | ||
247 | (re-export (%glutPopWindow . pop-window) | |
248 | (%glutPushWindow . push-window)) | |
249 | ||
250 | \f | |
251 | ;;; | |
252 | ;;; 9 State Retrieval | |
253 | ;;; | |
254 | ||
255 | ;;; | |
256 | ;;; 9.1 glutGet | |
257 | ;;; | |
258 | ||
259 | (define (window-x width) | |
260 | (maybe-with-window window | |
261 | (%glutGet (glut-state window-x)))) | |
262 | ||
263 | (define (window-y width) | |
264 | (maybe-with-window window | |
265 | (%glutGet (glut-state window-y)))) | |
266 | ||
267 | (define (window-position window) | |
268 | (maybe-with-window window | |
269 | (cons (window-x #t) | |
270 | (window-y #t)))) | |
271 | ||
272 | (define (window-width width) | |
273 | (maybe-with-window window | |
274 | (%glutGet (glut-state window-width)))) | |
275 | ||
276 | (define (window-height width) | |
277 | (maybe-with-window window | |
278 | (%glutGet (glut-state window-height)))) | |
279 | ||
280 | (define (window-size window) | |
281 | (maybe-with-window window | |
282 | (cons (window-width #t) | |
283 | (window-height #t)))) | |
284 | ||
285 | (define (window-color-buffer-size window) | |
286 | (maybe-with-window window | |
287 | (%glutGet (glut-state window-buffer-size)))) | |
288 | ||
289 | (define (window-stencil-buffer-size window) | |
290 | (maybe-with-window window | |
291 | (%glutGet (glut-state window-stencil-size)))) | |
292 | ||
293 | (define (window-depth-buffer-size window) | |
294 | (maybe-with-window window | |
295 | (%glutGet (glut-state window-depth-size)))) | |
296 | ||
297 | (define (window-red-size window) | |
298 | (maybe-with-window window | |
299 | (%glutGet (glut-state window-red-size)))) | |
300 | ||
301 | (define (window-green-size window) | |
302 | (maybe-with-window window | |
303 | (%glutGet (glut-state window-green-size)))) | |
304 | ||
305 | (define (window-blue-size window) | |
306 | (maybe-with-window window | |
307 | (%glutGet (glut-state window-blue-size)))) | |
308 | ||
309 | (define (window-alpha-size window) | |
310 | (maybe-with-window window | |
311 | (%glutGet (glut-state window-alpha-size)))) | |
312 | ||
313 | ;; TODO: window-accum | |
314 | ||
315 | (define (window-rgba? window) | |
316 | (maybe-with-window window | |
317 | (eqv? (%glutGet (glut-state window-rgba)) | |
318 | 1))) | |
319 | ||
320 | (define (window-double-buffered? window) | |
321 | (maybe-with-window window | |
322 | (eqv? (%glutGet (glut-state window-doublebuffer)) | |
323 | 1))) | |
324 | ||
325 | (define (window-parent window) | |
326 | (maybe-with-window window | |
327 | (let ((ret (%glutGet (glut-state window-parent)))) | |
328 | (and (not (zero? ret)) | |
329 | (%make-window ret #t))))) | |
330 | ||
331 | (define (window-number-of-children window) | |
332 | (maybe-with-window window | |
333 | (%glutGet (glut-state window-num-children)))) | |
334 | ||
335 | (define (window-colormap-size window) | |
336 | (maybe-with-window window | |
337 | (%glutGet (glut-state window-colormap-size)))) | |
338 | ||
339 | (define (window-number-of-samples window) | |
340 | (maybe-with-window window | |
341 | (%glutGet (glut-state window-num-samples)))) | |
342 | ||
343 | (define (window-stereo? window) | |
344 | (maybe-with-window window | |
345 | (eqv? (%glutGet (glut-state window-stereo)) | |
346 | 1))) | |
347 | ||
348 | ;; TODO: window-cursor | |
349 | ||
350 | (export window-x | |
351 | window-y | |
352 | window-position | |
353 | window-width | |
354 | window-height | |
355 | window-size | |
356 | window-color-buffer-size | |
357 | window-stencil-buffer-size | |
358 | window-depth-buffer-size | |
359 | window-red-size | |
360 | window-green-size | |
361 | window-blue-size | |
362 | window-alpha-size | |
363 | window-rgba | |
364 | window-double-buffered? | |
365 | window-parent | |
366 | window-number-of-children | |
367 | window-colormap-size | |
368 | window-number-of-samples | |
369 | window-stereo?) | |
370 | ||
371 | (define (screen-width) | |
372 | (let ((ret (%glutGet (glut-state screen-width)))) | |
373 | (and (not (zero? ret)) | |
374 | ret))) | |
375 | ||
376 | (define (screen-height) | |
377 | (let ((ret (%glutGet (glut-state screen-height)))) | |
378 | (and (not (zero? ret)) | |
379 | ret))) | |
380 | ||
381 | (define (screen-size) | |
382 | (and (screen-width) | |
383 | (cons (screen-width) | |
384 | (screen-height)))) | |
385 | ||
386 | (define (screen-width-mm) | |
387 | (let ((ret (%glutGet (glut-state screen-width-mm)))) | |
388 | (and (not (zero? ret)) | |
389 | ret))) | |
390 | ||
391 | (define (screen-height-mm) | |
392 | (let ((ret (%glutGet (glut-state screen-height-mm)))) | |
393 | (and (not (zero? ret)) | |
394 | ret))) | |
395 | ||
396 | (define (screen-size-mm) | |
397 | (and (screen-width-mm) | |
398 | (cons (screen-width-mm) | |
399 | (screen-height-mm)))) | |
400 | ||
401 | (export screen-width | |
402 | screen-height | |
403 | screen-size | |
404 | screen-width-mm | |
405 | screen-height-mm | |
406 | screen-size-mm) | |
407 | ||
408 | ;; TODO: menu-number-of-items | |
409 | ||
410 | (define (display-mode-possible?) | |
411 | (eqv? (%glutGet (glut-state display-mode-possible)) | |
412 | 1)) | |
413 | ||
414 | (define (initial-display-mode) | |
415 | (%glutGet (glut-state init-display-mode))) | |
416 | ||
417 | (define (initial-window-x) | |
418 | (%glutGet (glut-state init-window-x))) | |
419 | ||
420 | (define (initial-window-y) | |
421 | (%glutGet (glut-state init-window-y))) | |
422 | ||
423 | (define (initial-window-position) | |
424 | (cons (initial-window-x) | |
425 | (initial-window-y))) | |
426 | ||
427 | (define (initial-window-width) | |
428 | (%glutGet (glut-state init-window-width))) | |
429 | ||
430 | (define (initial-window-height) | |
431 | (%glutGet (glut-state init-window-height))) | |
432 | ||
433 | (define (initial-window-size) | |
434 | (cons (initial-window-width) | |
435 | (initial-window-height))) | |
436 | ||
437 | (define (elapsed-time) | |
438 | (%glutGet (glut-state elapsed-time))) | |
439 | ||
440 | (export display-mode-possible? | |
441 | initial-display-mode | |
442 | initial-window-x | |
443 | initial-window-y | |
444 | initial-window-position | |
445 | initial-window-width | |
446 | initial-window-height | |
447 | initial-window-size | |
448 | elapsed-time) |