X-Git-Url: https://git.jsancho.org/?a=blobdiff_plain;f=gacela_draw.lisp;h=8cff747d38ebc59bb222e10bd49b415d2ea3e1b4;hb=6a3d1ffb69036e6d4f1c239fd7d52f9bfc48d50c;hp=a3a19c74bb7b7aa0d62c6d81ef68778a72fb2894;hpb=00abf12486704814b6aa12d8b162135df6637141;p=gacela.git

diff --git a/gacela_draw.lisp b/gacela_draw.lisp
index a3a19c7..8cff747 100644
--- a/gacela_draw.lisp
+++ b/gacela_draw.lisp
@@ -71,12 +71,17 @@
     (cond ((/= image 0)
 	   (let* ((width (surface-w image)) (height (surface-h image))
 		  (power-2 (nearest-power-of-two (min width height)))
-		  (zoomx (/ power-2 width)) (zoomy (/ power-2 height))
-		  zoomed-image)
-	     (cond ((and (= zoomx 1) (= zoomy 1)) (values image width height))
-		   (t (setq zoomed-image (zoomSurface image zoomx zoomy 0))
+		  resized-image)
+	     (cond ((and (= width power-2) (= height power-2)) (values image width height))
+		   (t (setq resized-image (resize-surface image power-2 power-2))
 		      (SDL_FreeSurface image)
-		      (cond ((/= zoomed-image 0) (values zoomed-image width height))))))))))
+		      (cond ((/= resized-image 0) (values resized-image width height))))))))))
+
+(defun resize-surface (surface width height)
+  (let ((old-width (surface-w surface)) (old-height (surface-h surface)))
+    (cond ((and (= width old-width) (= height old-height)) surface)
+	  (t (let ((zoomx (/ (+ width 0.5) old-width)) (zoomy (/ (+ height 0.5) old-height)))
+	       (zoomSurface surface zoomx zoomy 0))))))
 
 (defun load-texture (filename &key (min-filter GL_LINEAR) (mag-filter GL_LINEAR) static)
   (let ((key (make-resource-texture :filename filename :min-filter min-filter :mag-filter mag-filter)))
@@ -91,9 +96,10 @@
       (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_RGB GL_RGBA)
-				(if (= (surface-format-BytesPerPixel image) 3) GL_BGR GL_BGRA)))
+				(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)
@@ -106,13 +112,15 @@
 			     :static static)
 	       key)))))))
 
-(defun draw-image-function (filename)
+(defun draw-image (filename &ptional (zoom 1))
   (let ((texture (load-texture filename)))
-    (lambda (&optional (f 1))
-      (cond (texture
-	     (let ((width (getf (get-resource texture) :width))
-		   (height (getf (get-resource texture) :height)))
-	       (draw-rectangle (* f width) (* f height) :texture texture)))))))
+    (cond (texture (draw-texture texture zoom)))))
+
+(defun draw-texture (texture &optional (zoom 1))
+  (cond (texture
+	 (let ((width (getf (get-resource texture) :width))
+	       (height (getf (get-resource texture) :height)))
+	   (draw-rectangle (* zoom width) (* zoom height) :texture texture)))))
 
 (defun draw-quad (v1 v2 v3 v4 &key texture)
   (let ((id-texture (getf (get-resource texture) :id-texture)))