X-Git-Url: https://git.jsancho.org/?a=blobdiff_plain;f=gacela%2Fimage.scm;h=e6c8f4ef74a38fbf24a59213656ec51d8645facf;hb=a586780bf88efb2a54df1e2af26600a549f7113d;hp=6a9710101009f7014360f0ca2ab21c69f2fa3655;hpb=e07174ebbc0c612e7b88ae75e261e14a52b686fd;p=gacela.git

diff --git a/gacela/image.scm b/gacela/image.scm
index 6a97101..e6c8f4e 100644
--- a/gacela/image.scm
+++ b/gacela/image.scm
@@ -17,21 +17,58 @@
 
 (define-module (gacela image)
   #:use-module (gacela scene)
+  #:use-module (gacela game)
+  #:use-module ((sdl2) #:prefix sdl2:)
+  #:use-module ((sdl2 image) #:prefix sdl2:)
+  #:use-module ((sdl2 render) #:prefix sdl2:)
   #:use-module ((sdl2 surface) #:prefix sdl2:)
-  #:export (import-bitmap
-	    move-xy))
+  #:use-module (gl)
+  #:export (image
+            move
+            scale))
 
-(define-syntax-rule (import-bitmap filename)
+(define (calculate proc-or-value)
+  (if (procedure? proc-or-value)
+      (proc-or-value)
+      proc-or-value))
+
+(define (image filename)
+  (make-scene
+   "image"
+   (let ((image (sdl2:load-image filename))
+         (texture #f)
+         (w/2 0)
+         (h/2 0))
+     (lambda ()
+       (when (not texture)
+         (set! texture (sdl2:surface->texture %sdl-renderer image))
+         (set! w/2 (/ (sdl2:surface-width image) 2))
+         (set! h/2 (/ (sdl2:surface-height image) 2)))
+       (gl-enable (oes-framebuffer-object texture-2d))
+       (sdl2:bind-texture texture)
+       (gl-begin (begin-mode quads)
+         (gl-texture-coordinates 0 0)
+         (gl-vertex (- w/2) h/2 0)
+         (gl-texture-coordinates 1 0)
+         (gl-vertex w/2 h/2 0)
+         (gl-texture-coordinates 1 1)
+         (gl-vertex w/2 (- h/2) 0)
+         (gl-texture-coordinates 0 1)
+         (gl-vertex (- w/2) (- h/2) 0))
+       (gl-disable (oes-framebuffer-object texture-2d))))))
+
+(define* (move scene x y #:optional (z 0))
   (make-scene
-   "bitmap"
-   (let ((surface (sdl2:load-bmp filename)))
-     (let ((a 0))
-       (lambda ()
-	 (set! a (+ a 1))
-	 (format #t "Steps: ~a~%" a))))))
+   "move"
+   (lambda ()
+     (gl-translate (calculate x)
+                   (calculate y)
+                   (calculate z))
+     (display-scene scene))))
 
-(define-syntax-rule (move-xy x y scene)
+(define* (scale scene x #:optional (y x) (z y))
   (make-scene
-   "move-xy"
+   "scale"
    (lambda ()
+     (gl-scale x y z)
      (display-scene scene))))