;;; Default values for Gacela
+(define *title* "Gacela")
(define *width-screen* 640)
(define *height-screen* 480)
(define *bpp-screen* 32)
(define *frames-per-second* 20)
+(define *mode* '2d)
;;; SDL Initialization Subsystem
(define init-sdl #f)
+(define sdl-on? #f)
(define quit-sdl #f)
(let ((initialized #f))
(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)
(define init-video-mode #f)
(define video-mode-on? #f)
(define resize-screen #f)
-(define apply-mode-change #f)
(define quit-video-mode #f)
-(let ((screen #f) (flags 0) (current-width *width-screen*) (current-height *height-screen*) (current-bpp *bpp-screen*))
+(let ((screen #f) (flags 0))
(set! init-video-mode
- (lambda* (#:optional (width current-width) (height current-height) (bpp current-bpp))
+ (lambda ()
(cond ((not screen)
(init-sdl)
- (SDL_GL_SetAttribute SDL_GL_DOUBLEBUFFER 1)
- (set! flags (+ SDL_OPENGL SDL_GL_DOUBLEBUFFER SDL_HWPALETTE SDL_RESIZABLE
- (if (= (assoc-ref (SDL_GetVideoInfo) 'hw_available) 0) SDL_SWSURFACE SDL_HWSURFACE)
- (if (= (assoc-ref (SDL_GetVideoInfo) 'blit_hw) 0) 0 SDL_HWACCEL)))
- (set! screen (SDL_SetVideoMode width height bpp flags))
- (init-gl)
- (resize-screen-GL width height)
- (set! current-width width)
- (set! current-height height)
- (set! current-bpp bpp))
+ (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?
(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! current-width width)
- (set! current-height height)))
-
- (set! apply-mode-change
- (lambda () (resize-screen-GL current-width current-height)))
+ (resize-screen-GL width height)))))
(set! quit-video-mode
- (lambda () (set! screen #f))))
+ (lambda ()
+ (SDL_FreeSurface screen)
+ (set! screen #f))))
(define (set-2d-mode)
(cond ((not (3d-mode?))
(glDepthFunc GL_LEQUAL)
(apply-mode-change))))
+(define (apply-mode-change)
+ (let* ((props (get-game-properties))
+ (width (assoc-ref props 'width)) (height (assoc-ref props 'height)))
+ (resize-screen-GL width height)))
+
(define (3d-mode?)
(eq? (assoc-ref (get-game-properties) 'mode) '3d))
(glClearColor 0 0 0 0)
; (glClearDepth 1)
; (glDepthFunc GL_LEQUAL)
-; (glEnable GL_BLEND)
+ (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)
(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))))
-
-(define* (load-image image-file #:key transparent-color)
- (init-video-mode)
- (let ((loaded-image (IMG_Load image-file)))
- (cond ((= loaded-image 0) #f)
- (else (let ((optimized-image (SDL_DisplayFormat loaded-image)))
- (SDL_FreeSurface loaded-image)
- (cond ((= optimized-image 0) #f)
- ((not transparent-color) optimized-image)
- (else (SDL_SetColorKey optimized-image
- SDL_SRCCOLORKEY
- (SDL_MapRGB (surface-format optimized-image)
- (car transparent-color)
- (cadr transparent-color)
- (caddr transparent-color)))
- optimized-image)))))))
-
;;; Audio Subsystem
(set! audio #f))))
-;;; GaCeLa Functions
+;;; Resources Cache
+
+(define resources-cache (make-weak-value-hash-table))
+
+(define get-resource-from-cache #f)
+(define insert-resource-into-cache #f)
-(define (init-gacela)
- (init-sdl)
- (init-gl))
+(let ()
+ (set! get-resource-from-cache
+ (lambda (key)
+ (hash-ref resources-cache key)))
+ (set! insert-resource-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)))
(SDL_Delay (- time-per-frame frame-time))))))))
-(define set-game-properties #f)
+(define set-game-properties! #f)
(define get-game-properties #f)
-(let ((ptitle "") (pwidth *width-screen*) (pheight *height-screen*) (pbpp *bpp-screen*) (pfps *frames-per-second*) (pmode '2d))
- (set! set-game-properties
+(let ((ptitle *title*) (pwidth *width-screen*) (pheight *height-screen*) (pbpp *bpp-screen*) (pfps *frames-per-second*) (pmode *mode*))
+ (set! set-game-properties!
(lambda* (#:key title width height bpp fps mode)
; (init-video-mode)
(if title
(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)
+ (quit! #f)
(do () ((quit?))
(init-frame-time)
-; (check-connections)
-; (eval-from-clients)
+ (check-connections)
+ (eval-from-clients)
(process-events)
(cond ((not (quit?))
- (glClear (+ GL_COLOR_BUFFER_BIT GL_DEPTH_BUFFER_BIT))
- (to-origin)
- (cond ((mobs-changed?) (set! mobs (get-active-mobs))))
- (if (procedure? game-code) (game-code))
- (process-mobs mobs)
- (SDL_GL_SwapBuffers)
+ (cond ((video-mode-on?)
+ (glClear (+ GL_COLOR_BUFFER_BIT GL_DEPTH_BUFFER_BIT))
+ (to-origin)))
+ (refresh-active-mobs)
+ (if (procedure? game-code)
+ (catch #t
+ (lambda () (game-code))
+ (lambda (key . args) #f)))
+ (cond ((video-mode-on?)
+ (run-mobs)
+ (SDL_GL_SwapBuffers)))
(delay-frame))))
(set! running #f)))
(set! set-game-code
(lambda (game-function)
(set! game-code game-function))))
-
-(define (quit-game)
- (quit-audio)
- (quit-video-mode)
-; (quit-all-mobs)
-; (kill-all-objects)
-; (clear-events)
- (quit-events)
- (quit-sdl))
projects / gacela.git / blobdiff