(define-module (gacela video)
#:use-module (gacela sdl)
- #:use-module (gacela gl)
+; #:use-module (gacela gl)
+ #:use-module (figl gl)
+ #:use-module (figl glx)
+ #:use-module (figl glu)
#:use-module (gacela ftgl)
#:use-module (gacela math)
+ #:use-module (gacela utils)
#:use-module (ice-9 optargs)
#:use-module (ice-9 receive)
+ #:use-module (srfi srfi-9)
+ #:use-module (system foreign)
#:export (init-video
get-screen-height
get-screen-width
get-screen-bpp
+ set-screen-bpp!
resize-screen
quit-video
clear-screen
flip-screen
+ set-screen-title!
+ get-screen-title
set-2d-mode
set-3d-mode
3d-mode?
- set-frames-per-second
+ get-frames-per-second
+ set-frames-per-second!
+ get-fullscreen
+ set-fullscreen!
init-frame-time
get-frame-time
delay-frame
get-current-color
set-current-color
with-color
- progn-textures
+ with-textures
draw
load-texture
+ load-texture-without-cache
+ get-texture-properties
draw-texture
draw-line
draw-quad
set-camera
camera-look
load-font
- render-text))
+ load-font-without-texture
+ render-text)
+ #:re-export (with-gl-push-matrix))
+
;;; Screen
-(define init-video #f)
-(define get-screen-height #f)
-(define get-screen-width #f)
-(define get-screen-bpp #f)
-(define resize-screen #f)
-(define quit-video #f)
-
-(let ((screen #f) (flags 0))
- (set! init-video
- (lambda* (width height bpp #:key (mode '2d) (title ""))
- (cond ((not screen)
- (SDL_Init SDL_INIT_VIDEO)
- (let ((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)))))))
-
- (set! get-screen-height
- (lambda ()
- (surface-h screen)))
-
- (set! get-screen-width
- (lambda ()
- (surface-w screen)))
-
- (set! get-screen-bpp
- (lambda ()
- (surface-format-BytesPerPixel screen)))
-
- (set! resize-screen
- (lambda (width height)
- (cond (screen
- (set! screen (SDL_SetVideoMode width height (get-screen-bpp) flags))
- (resize-screen-GL width height)))))
-
- (set! quit-video
- (lambda ()
- (cond (screen
- (SDL_FreeSurface screen)
- (set! screen #f)
- (SDL_Quit))))))
+(define screen #f)
+(define flags 0)
+
+(define* (init-video width height bpp #:key (mode '2d) (title "") (fps 20) (fullscreen 'off))
+ (SDL_Init SDL_INIT_VIDEO)
+ (let ((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)
+ (if (eq? fullscreen 'on) SDL_FULLSCREEN 0)))
+ (set! screen (SDL_SetVideoMode width height bpp flags))
+ (set-screen-title! title)
+ (set-frames-per-second! fps)
+ (set-fullscreen! fullscreen #f)
+ (init-gl)
+ (if (eq? mode '3d) (set-3d-mode) (set-2d-mode))))
+
+(define (get-screen-height)
+ (surface-h screen))
+
+(define (get-screen-width)
+ (surface-w screen))
+
+(define (get-screen-bpp)
+ (* (surface-format-BytesPerPixel screen) 8))
+
+(define (set-screen-bpp! bpp)
+ (cond (screen
+ (set! screen (SDL_SetVideoMode (get-screen-width) (get-screen-height) (get-screen-bpp) flags)))))
+
+(define (resize-screen width height)
+ (cond (screen
+ (set! screen (SDL_SetVideoMode width height (get-screen-bpp) flags))
+ (resize-screen-GL width height))))
+
+(define (quit-video)
+ (cond (screen
+ (SDL_FreeSurface screen)
+ (set! screen #f)
+ (SDL_Quit))))
(define (clear-screen)
- (glClear (+ GL_COLOR_BUFFER_BIT GL_DEPTH_BUFFER_BIT)))
+ (gl-clear (clear-buffer-mask color-buffer depth-buffer)))
(define (flip-screen)
(SDL_GL_SwapBuffers))
-(define set-2d-mode #f)
-(define set-3d-mode #f)
-(define 3d-mode? #f)
+(define screen-title "")
+
+(define (set-screen-title! title)
+ (set! screen-title title)
+ (SDL_WM_SetCaption title ""))
+
+(define (get-screen-title)
+ screen-title)
+
+
+(define mode '2d)
+
+(define (set-2d-mode)
+ (set! mode '2d)
+ (gl-disable (enable-cap depth-test))
+ (resize-screen-GL (get-screen-width) (get-screen-height)))
+
+(define (set-3d-mode)
+ (set! mode '3d)
+ (set-gl-clear-depth 1)
+ (gl-enable (enable-cap depth-test))
+ (set-gl-depth-function (depth-function lequal))
+ (resize-screen-GL (get-screen-width) (get-screen-height)))
+
+(define (3d-mode?)
+ (eq? mode '3d))
-(let ((mode '2d))
- (set! set-2d-mode
- (lambda ()
- (set! mode '2d)
- (glDisable GL_DEPTH_TEST)
- (resize-screen-GL (get-screen-width) (get-screen-height))))
- (set! set-3d-mode
- (lambda ()
- (set! mode '3d)
- (glClearDepth 1)
- (glEnable GL_DEPTH_TEST)
- (glDepthFunc GL_LEQUAL)
- (resize-screen-GL (get-screen-width) (get-screen-height))))
+(define fullscreen 'off)
- (set! 3d-mode?
- (lambda ()
- (eq? mode '3d))))
+(define* (set-fullscreen! fs #:optional (toggle #t))
+ (cond ((or (and (eq? fullscreen 'on) (eq? fs 'off))
+ (and (eq? fullscreen 'off) (eq? fs 'on)))
+ (set! fullscreen fs)
+ (cond (toggle
+ (SDL_WM_ToggleFullScreen screen))))))
+
+(define (get-fullscreen)
+ fullscreen)
(define (init-gl)
- (glShadeModel GL_SMOOTH)
- (glClearColor 0 0 0 0)
- (glEnable GL_BLEND)
- (glBlendFunc GL_SRC_ALPHA GL_ONE_MINUS_SRC_ALPHA)
- (glHint GL_PERSPECTIVE_CORRECTION_HINT GL_NICEST))
+ (set-gl-shade-model (shading-model smooth))
+ (set-gl-clear-color 0 0 0 0)
+ (gl-enable (enable-cap blend))
+ (set-gl-blend-function (blending-factor-dest src-alpha) (blending-factor-dest one-minus-src-alpha))
+ (set-gl-hint (hint-target perspective-correction-hint) (hint-mode nicest)))
(define (resize-screen-GL width height)
- (glViewport 0 0 width height)
- (glMatrixMode GL_PROJECTION)
- (glLoadIdentity)
+ (gl-viewport 0 0 width height)
+ (set-gl-matrix-mode (matrix-mode projection))
+ (gl-load-identity)
(cond ((3d-mode?)
(let ((ratio (if (= height 0) width (/ width height))))
- (gluPerspective 45 ratio 0.1 100)))
+ (glu-perspective 45 ratio 0.1 100)))
(else
(let* ((w (/ width 2)) (h (/ height 2)))
- (glOrtho (- w) w (- h) h 0 1))))
- (glMatrixMode GL_MODELVIEW)
- (glLoadIdentity))
+ (gl-ortho (- w) w (- h) h 0 1))))
+ (set-gl-matrix-mode (matrix-mode modelview))
+ (gl-load-identity))
;;; Frames per second
-(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*)))
-;; (set! set-frames-per-second
-;; (lambda (fps)
-;; (set! time-per-frame (/ 1000.0 fps))))
+(define time 0)
+(define frames-per-second 20)
+(define time-per-frame 50) ;in ms
-;; (set! init-frame-time
-;; (lambda ()
-;; (set! time (SDL_GetTicks))))
+(define (get-frames-per-second)
+ frames-per-second)
-;; (set! get-frame-time
-;; (lambda ()
-;; time))
+(define (set-frames-per-second! fps)
+ (set! frames-per-second fps)
+ (set! time-per-frame (/ 1000.0 fps)))
-;; (set! delay-frame
-;; (lambda ()
-;; (let ((frame-time (- (SDL_GetTicks) time)))
-;; (cond ((< frame-time time-per-frame)
-;; (SDL_Delay (- time-per-frame frame-time))))))))
+(define (init-frame-time)
+ (set! time (SDL_GetTicks)))
+(define (get-frame-time)
+ time)
-;;; Drawing
+(define (delay-frame)
+ (let ((frame-time (- (SDL_GetTicks) time)))
+ (cond ((< frame-time time-per-frame)
+ (SDL_Delay (- time-per-frame frame-time))))))
-(define get-current-color #f)
-(define set-current-color #f)
-(let ((current-color '(1 1 1 1)))
- (set! get-current-color
- (lambda ()
- current-color))
+;;; Textures
- (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-record-type <texture>
+ (texture id width height)
+ texture?
+ (id texture-id)
+ (width texture-width set-texture-width)
+ (height texture-height set-texture-height))
-(define-macro (with-color color . code)
- (cond (color
- `(let ((original-color (get-current-color))
- (result #f))
- (apply set-current-color ,color)
- (set! result (begin ,@code))
- (apply set-current-color original-color)
- result))
- (else `(begin ,@code))))
-
-(define-macro (progn-textures . code)
+(define-macro (with-textures . code)
`(let ((result #f))
- (glEnable GL_TEXTURE_2D)
+ (gl-enable (oes-framebuffer-object texture-2d))
(set! result (begin ,@code))
- (glDisable GL_TEXTURE_2D)
+ (gl-disable (oes-framebuffer-object texture-2d))
result))
-(define (draw . vertexes)
- (begin-draw (length vertexes))
- (draw-vertexes vertexes)
- (glEnd))
-
-(define (begin-draw number-of-points)
- (cond ((= number-of-points 2) (glBegin GL_LINES))
- ((= number-of-points 3) (glBegin GL_TRIANGLES))
- ((= number-of-points 4) (glBegin GL_QUADS))))
-
-(define (draw-vertexes vertexes)
- (cond ((not (null? vertexes))
- (draw-vertex (car vertexes))
- (draw-vertexes (cdr vertexes)))))
-
-(define* (draw-vertex vertex #:key texture-coord)
- (cond ((list? (car vertex))
- (with-color (car vertex)
- (apply simple-draw-vertex (cadr vertex))))
- (else
- (cond (texture-coord (apply glTexCoord2f texture-coord)))
- (apply simple-draw-vertex vertex))))
-
-(define* (simple-draw-vertex x y #:optional (z 0))
- (cond ((3d-mode?) (glVertex3f x y z))
- (else (glVertex2f x y))))
-
(define (load-image filename)
(let ((image (IMG_Load filename)))
(cond (image
(else (let ((zoomx (/ (+ width 0.5) old-width)) (zoomy (/ (+ height 0.5) old-height)))
(zoomSurface surface zoomx zoomy 0))))))
-(define* (load-texture filename #:key (min-filter GL_LINEAR) (mag-filter GL_LINEAR))
- (progn-textures
+(define* (load-texture-without-cache filename #:key (min-filter (texture-min-filter linear)) (mag-filter (texture-mag-filter linear)))
+ (with-textures
(receive
(image real-w real-h) (load-image-for-texture filename)
(cond (image
- (let ((width (surface-w image)) (height (surface-h image))
- (byteorder (if (= SDL_BYTEORDER SDL_LIL_ENDIAN)
- (if (= (surface-format-BytesPerPixel image) 3) GL_BGR GL_BGRA)
- (if (= (surface-format-BytesPerPixel image) 3) GL_RGB GL_RGBA)))
- (texture (car (glGenTextures 1))))
-
- (glBindTexture GL_TEXTURE_2D texture)
- (glTexImage2D GL_TEXTURE_2D 0 4 width height 0 byteorder GL_UNSIGNED_BYTE (surface-pixels image))
- (glTexParameteri GL_TEXTURE_2D GL_TEXTURE_MIN_FILTER min-filter)
- (glTexParameteri GL_TEXTURE_2D GL_TEXTURE_MAG_FILTER mag-filter)
- (set-texture-size! texture real-w real-h)
- texture))))))
-
-(define* (draw-texture texture #:optional (zoom 1))
- (cond (texture
- (let ((width (texture-w texture))
- (height (texture-h texture)))
- (draw-rectangle (* zoom width) (* zoom height) #:texture texture)))))
+ (let ((width (surface-w image)) (height (surface-h image))
+ (byteorder (if (= SDL_BYTEORDER SDL_LIL_ENDIAN)
+ (if (= (surface-format-BytesPerPixel image) 3) (ext-bgra bgr-ext) (ext-bgra bgra-ext))
+ (if (= (surface-format-BytesPerPixel image) 3) (pixel-format rgb) (pixel-format rgba))))
+ (texture-id (gl-generate-texture))
+ (image-pointer (make-pointer
+ (if (> (surface-pixels image) 0)
+ (surface-pixels image)
+ (+ ($expt 2 32) (surface-pixels image))))))
+
+ (gl-bind-texture (oes-framebuffer-object texture-2d) texture-id)
+ (set-gl-texture-image (oes-framebuffer-object texture-2d) 0 4 0 byteorder (data-type unsigned-byte) image-pointer width height)
+ (set-gl-texture-parameter (oes-framebuffer-object texture-2d) (texture-parameter-name texture-min-filter) min-filter)
+ (set-gl-texture-parameter (oes-framebuffer-object texture-2d) (texture-parameter-name texture-mag-filter) mag-filter)
+ (texture texture-id real-w real-h)))))))
+
+(define load-texture (use-cache-with load-texture-without-cache))
+
+
+;;; Drawing
+
+(define current-color '(1 1 1 1))
+
+(define (get-current-color)
+ current-color)
+
+(define* (set-current-color red green blue #:optional (alpha 1))
+ (set! current-color (list red green blue alpha))
+ (gl-color red green blue alpha))
+
+(define-macro (with-color color . code)
+ `(cond (,color
+ (let ((original-color (get-current-color))
+ (result #f))
+ (apply set-current-color ,color)
+ (set! result (begin ,@code))
+ (apply set-current-color original-color)
+ result))
+ (else (begin ,@code))))
+
+(define (draw . vertexes)
+ (gl-begin
+ (let ((number-of-points (length vertexes)))
+ (cond ((= number-of-points 2) (begin-mode lines))
+ ((= number-of-points 3) (begin-mode triangles))
+ ((= number-of-points 4) (begin-mode quads))
+ ((> number-of-points 4) (begin-mode polygon))))
+ (draw-vertexes vertexes)))
-(define* (draw-line length #:optional color)
+(define (draw-vertexes vertexes)
+ (cond ((not (null? vertexes))
+ (apply draw-vertex (if (list? (caar vertexes)) (car vertexes) (list (car vertexes))))
+ (draw-vertexes (cdr vertexes)))))
+
+(define* (draw-vertex vertex #:key texture-coord)
+ (cond (texture-coord (apply gl-texture-coordinates texture-coord)))
+ (apply gl-vertex vertex))
+
+(define* (draw-texture texture #:key (zoom 1) (sprite '((0 0) (1 1))))
+ (cond (texture
+ (let ((width (texture-width texture))
+ (height (texture-height texture)))
+ (draw-rectangle (* zoom width (- (caadr sprite) (caar sprite)))
+ (* zoom height (- (cadadr sprite) (cadar sprite)))
+ #:texture texture
+ #:texture-coord sprite)))))
+
+(define* (draw-line length)
(let ((l (/ length 2)))
- (cond (color
- (with-color color (draw (list 0 l) (list 0 (- l)))))
- (else
- (draw (list 0 l) (list 0 (- l)))))))
+ (draw (list 0 l) (list 0 (- l)))))
+
+(define (draw-circle radius)
+ (gl-begin
+ (begin-mode polygon)
+ (do ((i 0 (1+ i)))
+ ((>= i 360))
+ (let ((a (degrees-to-radians i)))
+ (draw-vertex (list (* radius (cos a)) (* radius (sin a))))))))
-(define* (draw-quad v1 v2 v3 v4 #:key texture color)
+(define* (draw-quad v1 v2 v3 v4 #:key texture (texture-coord '((0 0) (1 1))))
(cond (texture
- (progn-textures
- (glBindTexture GL_TEXTURE_2D texture)
- (begin-draw 4)
- (draw-vertex v1 #:texture-coord '(0 0))
- (draw-vertex v2 #:texture-coord '(1 0))
- (draw-vertex v3 #:texture-coord '(1 1))
- (draw-vertex v4 #:texture-coord '(0 1))
- (glEnd)))
- (color
- (with-color color (draw v1 v2 v3 v4)))
+ (with-textures
+ (gl-bind-texture (oes-framebuffer-object texture-2d) (texture-id texture))
+ (draw (list v1 #:texture-coord (car texture-coord))
+ (list v2 #:texture-coord (list (caadr texture-coord) (cadar texture-coord)))
+ (list v3 #:texture-coord (cadr texture-coord))
+ (list v4 #:texture-coord (list (caar texture-coord) (cadadr texture-coord))))))
(else
(draw v1 v2 v3 v4))))
-(define* (draw-rectangle width height #:key texture color)
+(define* (draw-rectangle width height #:key texture texture-coord)
(let ((w (/ width 2)) (h (/ height 2)))
(draw-quad (list (- w) h 0)
(list w h 0)
(list w (- h) 0)
(list (- w) (- h) 0)
#:texture texture
- #:color color)))
+ #:texture-coord texture-coord)))
-(define* (draw-square #:key (size 1) texture color)
- (draw-rectangle size size #:texture texture #:color color))
+(define* (draw-square size #:key texture)
+ (draw-rectangle size size #:texture texture))
(define* (draw-cube #:key (size 1)
texture texture-1 texture-2 texture-3 texture-4 texture-5 texture-6
- color color-1 color-2 color-3 color-4 color-5 color-6)
+ color-1 color-2 color-3 color-4 color-5 color-6)
(let ((-size (- size)))
- (progn-textures
- (glNormal3f 0 0 1)
- (draw-quad (list -size size size) (list size size size) (list size -size size) (list -size -size size) #:texture (or texture-1 texture) #:color (or color-1 color))
- (glNormal3f 0 0 -1)
- (draw-quad (list -size -size -size) (list size -size -size) (list size size -size) (list -size size -size) #:texture (or texture-2 texture) #:color (or color-2 color))
- (glNormal3f 0 1 0)
- (draw-quad (list size size size) (list -size size size) (list -size size -size) (list size size -size) #:texture (or texture-3 texture) #:color (or color-3 color))
- (glNormal3f 0 -1 0)
- (draw-quad (list -size -size size) (list size -size size) (list size -size -size) (list -size -size -size) :texture (or texture-4 texture) #:color (or color-4 color))
- (glNormal3f 1 0 0)
- (draw-quad (list size -size -size) (list size -size size) (list size size size) (list size size -size) :texture (or texture-5 texture) #:color (or color-5 color))
- (glNormal3f -1 0 0)
- (draw-quad (list -size -size size) (list -size -size -size) (list -size size -size) (list -size size size) :texture (or texture-6 texture) #:color (or color-6 color)))))
-
-(define* (translate x y #:optional (z 0))
- (glTranslatef x y z))
-
-(define* (rotate #:rest rot)
+ (with-textures
+ (gl-normal 0 0 1)
+ (with-color color-1 (draw-quad (list -size size size) (list size size size) (list size -size size) (list -size -size size) #:texture (or texture-1 texture)))
+ (gl-normal 0 0 -1)
+ (with-color color-2 (draw-quad (list -size -size -size) (list size -size -size) (list size size -size) (list -size size -size) #:texture (or texture-2 texture)))
+ (gl-normal 0 1 0)
+ (with-color color-3 (draw-quad (list size size size) (list -size size size) (list -size size -size) (list size size -size) #:texture (or texture-3 texture)))
+ (gl-normal 0 -1 0)
+ (with-color color-4 (draw-quad (list -size -size size) (list size -size size) (list size -size -size) (list -size -size -size) #:texture (or texture-4 texture)))
+ (gl-normal 1 0 0)
+ (with-color color-5 (draw-quad (list size -size -size) (list size -size size) (list size size size) (list size size -size) #:texture (or texture-5 texture)))
+ (gl-normal -1 0 0)
+ (with-color color-6 (draw-quad (list -size -size size) (list -size -size -size) (list -size size -size) (list -size size size) #:texture (or texture-6 texture))))))
+
+(define* (gtranslate x y #:optional (z 0))
+ (gl-translate x y z))
+
+(define (grotate . rot)
(cond ((3d-mode?)
(apply 3d-rotate rot))
(else
- (apply 2d-rotate rot))))
+ (2d-rotate (car (last-pair rot))))))
(define (3d-rotate xrot yrot zrot)
- (glRotatef xrot 1 0 0)
- (glRotatef yrot 0 1 0)
- (glRotatef zrot 0 0 1))
+ (gl-rotate xrot 1 0 0)
+ (gl-rotate yrot 0 1 0)
+ (gl-rotate zrot 0 0 1))
(define (2d-rotate rot)
- (glRotatef rot 0 0 1))
+ (gl-rotate rot 0 0 1))
(define (to-origin)
- (glLoadIdentity)
+ (gl-load-identity)
(cond ((3d-mode?) (camera-look))))
;;; Lights
-(define* (add-light #:key light position ambient (id GL_LIGHT1) (turn-on t))
- (init-lighting)
- (and light (glLightfv id GL_DIFFUSE (first light) (second light) (third light) (fourth light)))
- (and light position (glLightfv GL_POSITION (first position) (second position) (third position) (fourth position)))
- (and ambient (glLightfv id GL_AMBIENT (first ambient) (second ambient) (third ambient) (fourth ambient)))
- (and turn-on (glEnable id))
- id)
+;; (define* (add-light #:key light position ambient (id GL_LIGHT1) (turn-on t))
+;; (init-lighting)
+;; (and light (glLightfv id GL_DIFFUSE (car light) (cadr light) (caddr light) (cadddr light)))
+;; (and light position (glLightfv GL_POSITION (car position) (cadr position) (caddr position) (cadddr position)))
+;; (and ambient (glLightfv id GL_AMBIENT (car ambient) (cadr ambient) (caddr ambient) (cadddr ambient)))
+;; (and turn-on (gl-enable id))
+;; id)
;;; Camera
-(define set-camera #f)
-(define camera-look #f)
+(define camera-eye '(0 0 0))
+(define camera-center '(0 0 -100))
+(define camera-up '(0 1 0))
-(let ((camera-eye '(0 0 0)) (camera-center '(0 0 -100)) (camera-up '(0 1 0)))
- (set! set-camera
- (lambda* (#:key eye center up)
- (cond (eye (set! camera-eye eye)))
- (cond (center (set! camera-center center)))
- (cond (up (set! camera-up up)))))
+(define* (set-camera #:key eye center up)
+ (cond (eye (set! camera-eye eye)))
+ (cond (center (set! camera-center center)))
+ (cond (up (set! camera-up up))))
- (set! camera-look
- (lambda ()
- (apply gluLookAt (append camera-eye camera-center camera-up)))))
+(define (camera-look)
+ (apply glu-look-at (append camera-eye camera-center camera-up)))
;;; Text and fonts
-(define* (load-font font-file #:key (size 40) (encoding ft_encoding_unicode))
- (let ((font (ftglCreateTextureFont font-file)))
+(define* (load-font-without-cache font-file #:key (size 40) (encoding ft_encoding_unicode))
+ (let ((font (ftglCreateTextureFont font-file size)))
(ftglSetFontFaceSize font size 72)
(ftglSetFontCharMap font encoding)
font))
+(define load-font (use-cache-with load-font-without-cache))
+
(define* (render-text text font #:key (size #f))
- (cond (size (ftglSetFontFaceSize font size 72)))
+ (cond (size
+ (cond ((not (= (ftglGetFontFaceSize font) size))
+ (ftglSetFontFaceSize font size 72))))
+ ((not (= (ftglGetFontFaceSize font) (font-size font)))
+ (ftglSetFontFaceSize font (font-size font) 72)))
(ftglRenderFont font text FTGL_RENDER_ALL))
+
+
+;;; Meshes
+
+(define mesh-type
+ (make-record-type "mesh"
+ '(draw translate turn rotate color inner-properties inner-property properties properties-set! property property-set!)
+ (lambda (record port)
+ (format port "#<mesh: ~a" (mesh-inner-property record 'type))
+ (for-each (lambda (x) (format port " ~a" x))
+ (mesh-properties record))
+ (display ">" port))))
+
+(define mesh? (record-predicate mesh-type))
+
+(define (make-mesh type proc)
+ (apply
+ (record-constructor mesh-type)
+ (let ((px 0) (py 0) (pz 0)
+ (ax 0) (ay 0) (az 0)
+ (rx 0) (ry 0) (rz 0)
+ (color #f)
+ (properties '()))
+ (let ((inner-properties
+ (lambda ()
+ `((type . ,type) (color . ,color)
+ (x . ,px) (y . ,py) (z . ,pz)
+ (ax . ,ax) (ay . ,ay) (az . ,az)
+ (rx . ,rx) (ry . ,ry) (rz . ,rz)))))
+ (list
+ (lambda ()
+ "draw"
+ (with-gl-push-matrix
+ (grotate ax ay az)
+ (gtranslate px py pz)
+ (grotate rx ry rz)
+ (with-color color (proc properties))))
+ (lambda (x y z)
+ "translate"
+ (set! px (+ px x))
+ (set! py (+ py y))
+ (set! pz (+ pz z)))
+ (lambda (x y z)
+ "turn"
+ (set! ax (+ ax x))
+ (set! ay (+ ay y))
+ (set! az (+ az z)))
+ (lambda (x y z)
+ "rotate"
+ (set! rx (+ rx x))
+ (set! ry (+ ry y))
+ (set! rz (+ rz z)))
+ (lambda (c)
+ "color"
+ (set! color c))
+ (lambda ()
+ "inner-properties"
+ (inner-properties))
+ (lambda (prop-name)
+ "inner-property"
+ (assoc-ref (inner-properties) prop-name))
+ (lambda ()
+ "properties"
+ properties)
+ (lambda (new-properties)
+ "properties-set!"
+ (set! properties new-properties))
+ (lambda (prop-name)
+ "property"
+ (assoc-ref properties prop-name))
+ (lambda (prop-name value)
+ "property-set!"
+ (set! properties (assoc-set! properties prop-name value))))))))
+
+(define (mesh-draw mesh)
+ (((record-accessor mesh-type 'draw) mesh)))
+
+(define (mesh-inner-properties mesh)
+ (((record-accessor mesh-type 'inner-properties) mesh)))
+
+(define (mesh-inner-property mesh prop-name)
+ (((record-accessor mesh-type 'inner-property) mesh) prop-name))
+
+(define (mesh-properties mesh)
+ (((record-accessor mesh-type 'properties) mesh)))
+
+(define (mesh-properties-set! mesh new-properties)
+ (((record-accessor mesh-type 'properties-set!) mesh) new-properties))
+
+(define (mesh-property mesh prop-name)
+ (((record-accessor mesh-type 'property) mesh) prop-name))
+
+(define (mesh-property-set! mesh prop-name value)
+ (((record-accessor mesh-type 'property-set!) mesh) prop-name value))
+
+(define* (translate mesh x y #:optional (z 0))
+ (((record-accessor mesh-type 'translate) mesh) x y z)
+ mesh)
+
+(define (turn mesh . params)
+ (apply ((record-accessor mesh-type 'turn) mesh)
+ (if (>= (length params) 3)
+ params
+ (list 0 0 (car params))))
+ mesh)
+
+(define (rotate mesh . params)
+ (apply ((record-accessor mesh-type 'rotate) mesh)
+ (if (>= (length params) 3)
+ params
+ (list 0 0 (car params))))
+ mesh)
+
+(define (color mesh c)
+ (((record-accessor mesh-type 'color) mesh) c)
+ mesh)
+
+
+;;; Advanced meshes
+
+(define (mesh-join . meshes)
+ (make-mesh
+ 'joined-meshes
+ (lambda (props)
+ (for-each (lambda (m) (with-gl-push-matrix (mesh-draw m))) meshes))))
+
+
+;;; Primitives
+
+(define-macro (primitive header . body)
+ (let* ((type (car header))
+ (args (cdr header))
+ (list-args (names-arguments args)))
+ `(lambda* ,args
+ (let ((m (make-mesh
+ ',type
+ (lambda (props)
+ (apply (lambda* ,(cons #:key list-args) ,@body)
+ (list
+ ,@(let get-params ((l list-args))
+ (cond ((null? l) '())
+ (else
+ (cons (symbol->keyword (car l))
+ (cons `(assoc-ref props ',(car l))
+ (get-params (cdr l)))))))))))))
+ (mesh-properties-set! m (list ,@(map (lambda (a) `(cons ',a ,a)) list-args)))
+ m))))
+
+(define-macro (define-primitive header . body)
+ `(define ,(car header) (primitive ,header ,@body)))
+
+
+;;; Primitives definition
+
+(define-primitive (square size #:key texture)
+ (draw-square size #:texture texture))
+
+(define-primitive (rectangle width height #:key texture texture-coord)
+ (draw-rectangle width height #:texture texture #:texture-coord texture-coord))
+
+(define-primitive (circle radius)
+ (draw-circle radius))
+
+(define-primitive (picture filename #:key (min-filter (texture-min-filter linear)) (mag-filter (texture-mag-filter linear)) (zoom 1) (sprite '((0 0) (1 1))))
+ (draw-texture (load-texture filename #:min-filter min-filter #:mag-filter mag-filter) #:zoom zoom #:sprite sprite))
+
+
+(module-map (lambda (sym var)
+ (if (not (eq? sym '%module-public-interface))
+ (module-export! (current-module) (list sym))))
+ (current-module))
\ No newline at end of file
projects / gacela.git / blobdiff