(define *mode* '2d)
-;;; SDL Initialization Subsystem
+;;; Resources Cache
-(define init-sdl #f)
-(define sdl-on? #f)
-(define quit-sdl #f)
+(define resources-cache (make-weak-value-hash-table))
-(let ((initialized #f))
- (set! init-sdl
- (lambda ()
- (cond ((not initialized) (SDL_Init SDL_INIT_EVERYTHING) (set! initialized #t))
- (else initialized))))
-
- (set! sdl-on?
- (lambda ()
- (if initialized #t #f)))
-
- (set! quit-sdl
- (lambda ()
- (SDL_Quit)
- (set! initialized #f))))
-
-
-;;; Video Subsystem
-
-(define init-video-mode #f)
-(define video-mode-on? #f)
-(define resize-screen #f)
-(define quit-video-mode #f)
-
-(let ((screen #f) (flags 0))
- (set! init-video-mode
- (lambda ()
- (cond ((not screen)
- (init-sdl)
- (let* ((props (get-game-properties))
- (width (assoc-ref props 'width)) (height (assoc-ref props 'height))
- (bpp (assoc-ref props 'bpp)) (title (assoc-ref props 'title))
- (mode (assoc-ref props 'mode))
- (info (SDL_GetVideoInfo)))
- (SDL_GL_SetAttribute SDL_GL_DOUBLEBUFFER 1)
- (set! flags (+ SDL_OPENGL SDL_GL_DOUBLEBUFFER SDL_HWPALETTE SDL_RESIZABLE
- (if (= (assoc-ref info 'hw_available) 0) SDL_SWSURFACE SDL_HWSURFACE)
- (if (= (assoc-ref info 'blit_hw) 0) 0 SDL_HWACCEL)))
- (set! screen (SDL_SetVideoMode width height bpp flags))
- (SDL_WM_SetCaption title "")
- (init-gl)
- (if (eq? mode '3d) (set-3d-mode) (set-2d-mode))))
- (else #t))))
-
- (set! video-mode-on?
- (lambda () (if screen #t #f)))
-
- (set! resize-screen
- (lambda* (width height #:optional (bpp current-bpp))
- (cond (screen (set! screen (SDL_SetVideoMode width height bpp flags))
- (resize-screen-GL width height)))))
-
- (set! quit-video-mode
- (lambda ()
- (SDL_FreeSurface screen)
- (set! screen #f))))
-
-(define (set-2d-mode)
- (cond ((not (3d-mode?))
- (init-video-mode)
- (glDisable GL_DEPTH_TEST)
- (apply-mode-change))))
-
-(define (set-3d-mode)
- (cond ((3d-mode?)
- (init-video-mode)
- (glClearDepth 1)
- (glEnable GL_DEPTH_TEST)
- (glDepthFunc GL_LEQUAL)
- (apply-mode-change))))
+(define from-cache #f)
+(define into-cache #f)
-(define (apply-mode-change)
- (let* ((props (get-game-properties))
- (width (assoc-ref props 'width)) (height (assoc-ref props 'height)))
- (resize-screen-GL width height)))
+(let ()
+ (set! from-cache
+ (lambda (key)
+ (hash-ref resources-cache key)))
-(define (3d-mode?)
- (eq? (assoc-ref (get-game-properties) 'mode) '3d))
-
-(define (init-gl)
- (glShadeModel GL_SMOOTH)
- (glClearColor 0 0 0 0)
-; (glClearDepth 1)
-; (glDepthFunc GL_LEQUAL)
- (glEnable GL_BLEND)
-; (glBlendFunc GL_SRC_ALPHA GL_ONE)
- (glBlendFunc GL_SRC_ALPHA GL_ONE_MINUS_SRC_ALPHA)
- (glHint GL_PERSPECTIVE_CORRECTION_HINT GL_NICEST)
- #t)
-
-(define (init-lighting)
- (init-video-mode)
- (glEnable GL_LIGHTING))
-
-(define (resize-screen-GL width height)
- (glViewport 0 0 width height)
- (glMatrixMode GL_PROJECTION)
- (glLoadIdentity)
- (cond ((3d-mode?) (let ((ratio (if (= height 0) width (/ width height))))
- (gluPerspective 45 ratio 0.1 100))) ;0.1
- (else (let* ((w (/ width 2)) (h (/ height 2)))
- (glOrtho (- w) w (- h) h 0 1))))
- (glMatrixMode GL_MODELVIEW)
- (glLoadIdentity)
- #t)
-
-(define get-current-color #f)
-(define set-current-color #f)
-
-(let ((current-color '(1 1 1 1)))
- (set! get-current-color
- (lambda ()
- current-color))
-
- (set! set-current-color
- (lambda* (red green blue #:optional (alpha 1))
- (set! current-color (list red green blue alpha))
- (glColor4f red green blue alpha))))
-
-
-;;; Audio Subsystem
-
-(define init-audio #f)
-(define quit-audio #f)
-
-(let ((audio #f))
- (set! init-audio
- (lambda ()
- (cond ((not audio) (begin (init-sdl) (set! audio (Mix_OpenAudio 22050 MIX_DEFAULT_FORMAT 2 4096))))
- (else audio))))
-
- (set! quit-audio
- (lambda ()
- (Mix_CloseAudio)
- (set! audio #f))))
+ (set! into-cache
+ (lambda (key res)
+ (hash-set! resources-cache key res))))
;;; GaCeLa Functions
(define set-frames-per-second #f)
(define init-frame-time #f)
+(define get-frame-time #f)
(define delay-frame #f)
(let ((time 0) (time-per-frame (/ 1000.0 *frames-per-second*)))
(lambda ()
(set! time (SDL_GetTicks))))
+ (set! get-frame-time
+ (lambda ()
+ time))
+
(set! delay-frame
(lambda ()
(let ((frame-time (- (SDL_GetTicks) time)))
(define game-running? #f)
(define set-game-code #f)
-(let ((running #f) (game-code #f) (mobs '()))
+(let ((running #f) (game-code #f))
(set! game-loop
(lambda ()
- (set! mobs (get-active-mobs))
+ (refresh-active-mobs)
(set! running #t)
(quit! #f)
(do () ((quit?))
(cond ((video-mode-on?)
(glClear (+ GL_COLOR_BUFFER_BIT GL_DEPTH_BUFFER_BIT))
(to-origin)))
- (cond ((mobs-changed?) (set! mobs (get-active-mobs))))
+ (refresh-active-mobs)
(if (procedure? game-code)
(catch #t
(lambda () (game-code))
(lambda (key . args) #f)))
(cond ((video-mode-on?)
- (run-mobs mobs)
+ (run-mobs)
(SDL_GL_SwapBuffers)))
(delay-frame))))
(set! running #f)))
projects / gacela.git / blobdiff