(else `(begin ,@code))))
(define-macro (progn-textures . code)
- `(let (values)
+ `(let ((result #f))
(init-video-mode)
(glEnable GL_TEXTURE_2D)
- (set! values (multiple-value-list (begin ,@code)))
+ (set! result (begin ,@code))
(glDisable GL_TEXTURE_2D)
- (apply values values)))
+ result))
(define (draw . vertexes)
(begin-draw (length vertexes))
(glEnd))
(define (begin-draw number-of-points)
- (cond ((= number-of-points 3) (glBegin GL_TRIANGLES))
+ (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 ((3d-mode?) (glVertex3f x y z))
(else (glVertex2f x y))))
-(define (load-image-for-texture filename)
- (init-video-mode)
+(define (load-image filename)
+ (init-sdl)
(let ((image (IMG_Load filename)))
+ (cond (image
+ (SDL_DisplayFormatAlpha image)))))
+
+(define (load-image-for-texture filename)
+ (init-sdl)
+ (let ((image (load-image filename)))
(cond (image
(let* ((width (surface-w image)) (height (surface-h image))
(power-2 (nearest-power-of-two (min width height)))
(resized-image #f))
(cond ((and (= width power-2) (= height power-2)) (values image width height))
(else (set! resized-image (resize-surface image power-2 power-2))
- (if resized-image (values resized-image width height)))))))))
+ (if resized-image (values resized-image width height))))))
+ (else
+ (values #f 0 0)))))
(define (resize-surface surface width height)
(let ((old-width (surface-w surface)) (old-height (surface-h surface)))
(zoomSurface surface zoomx zoomy 0))))))
(define* (load-texture filename #:key (min-filter GL_LINEAR) (mag-filter GL_LINEAR))
- (progn-textures
- (receive
- (image real-w real-h) (load-image-for-texture filename)
- (cond (image
- (let ((width (get-surface-width image)) (height (get-surface-height 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 3 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)
- texture))))))
+ (let* ((key (list filename min-filter mag-filter))
+ (res (get-resource-from-cache key)))
+ (cond (res res)
+ (else
+ (progn-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)
+ (insert-resource-into-cache key texture)
+ texture)))))))))
(define* (draw-image filename #:optional (zoom 1))
(let ((texture (load-texture filename)))
(height (texture-h texture)))
(draw-rectangle (* zoom width) (* zoom height) #:texture texture)))))
+(define* (draw-line length #:optional color)
+ (let ((l (/ length 2)))
+ (cond (color
+ (with-color color (draw (list 0 l) (list 0 (- l)))))
+ (else
+ (draw (list 0 l) (list 0 (- l)))))))
+
(define* (draw-quad v1 v2 v3 v4 #:key texture color)
(cond (texture
(progn-textures
(draw v1 v2 v3 v4))))
(define* (draw-rectangle width height #:key texture color)
- (draw-quad (list (- width) height 0)
- (list width height 0)
- (list width (- height) 0)
- (list (- width) (- height) 0)
- #:texture texture
- #:color color))
+ (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)))
(define* (draw-square #:key (size 1) texture color)
(draw-rectangle size size #:texture texture #:color color))