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[gacela.git] / gacela_draw.lisp

diff --git a/gacela_draw.lisp b/gacela_draw.lisp
index eeaaac922ae342d450254b4729eb366fc5ec125a..8cff747d38ebc59bb222e10bd49b415d2ea3e1b4 100644 (file)
--- 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)))
@@ -107,13 +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)))