Creating a spritesheet instead of many surfaces.

[uxul-world.git] / files.lisp

diff --git a/files.lisp b/files.lisp
index 0a880d1..3d1a253 100755 (executable)
--- a/files.lisp
+++ b/files.lisp
@@ -12,33 +12,81 @@
   "Resize that file to x times y."
   (uxul-world::resize-bmp-blob img x y))
 
-(defun ash-sized-image (img a)
-  "Calculate an image of half/eighth/quarter of the size."
-  (let ((w (bmp-width img))
-       (h (bmp-height img)))
-  (uxul-world::resize-bmp-blob img (max 1 (floor (/ w a))) (max 1 (floor (/ h a))))))
-
-(defun init-bmp-file (file)
-  "Load an image file into a Variable. Set |filename| (without .png
-and path) to a list with all sizes of that image."
-  (si (pathname-name file)
-       (with-open-file (in file :element-type '(unsigned-byte 8)) 
-        (let* ((length (file-length in))
-               (content (make-array (list length)
-                                    :element-type '(unsigned-byte 8)
-                                    :adjustable nil)))
-          (read-sequence content in)
-          content))))
+;; (defun init-bmp-file (file)
+;;   "Load an image file into a Variable. Set |filename| (without .png
+;; and path) to a list with all sizes of that image."
+;;   (si (pathname-name file)
+;;        (with-open-file (in file :element-type '(unsigned-byte 8)) 
+;;      (let* ((length (file-length in))
+;;             (content (make-array (list length)
+;;                                  :element-type '(unsigned-byte 8)
+;;                                  :adjustable nil)))
+;;        (read-sequence content in)
+;;        content))))
 
 (defun bmp-p (file)
   "Is the file relevant for initialization? So far only .png-files are
 relevant."
   (string= (pathname-type file) "bmp"))
 
+;; (defun init-bmp-files ()
+;;   (cl-fad:walk-directory
+;;    (asdf:component-pathname (asdf:find-system :uxul-world))
+;;    #'init-bmp-file :test #'bmp-p))
+
+(defvar *spritesheet*)
+(defvar *spritesheet-id*)
+
 (defun init-bmp-files ()
-  (cl-fad:walk-directory
-   (asdf:component-pathname (asdf:find-system :uxul-world))
-   #'init-bmp-file :test #'bmp-p))
+  (let* ((names (remove-if-not #'bmp-p
+                              (cl-fad:list-directory
+                               (asdf:component-pathname
+                                (asdf:find-system :uxul-world)))))
+        (number (length names))
+        (imagedata (mapcar #'load-file-to-sequence names))
+        (pixeldata (mapcar
+                    (lambda (x)
+                      (bmp-pixel-data x :destructive t))
+                    imagedata))
+        (widths (mapcar #'bmp-width imagedata))
+        (heights (mapcar #'bmp-height imagedata))
+        (max-width (apply #'max widths))
+        (max-height (apply #'max heights))
+        ;; minimize max-height * optimal-x-num + max-width *
+        ;; optimal-y-num, keeping optimal-x-num * optimal-y-num
+        ;; constant at the number of files (of course, round
+        ;; everything up)
+        (optimal-x-num (ceiling
+                        (sqrt (/ (* max-height number) max-width))))
+        (optimal-y-num (ceiling
+                        (sqrt (/ (* max-width number) max-height))))
+        ;; find the smallest powers of two such that both fit in it
+        (sidelength (expt 2 (max
+                             (ceiling (log (* max-width optimal-x-num) 2))
+                             (ceiling (log (* max-height optimal-y-num) 2)))))
+        (new-image-data (make-array (list (* 4 sidelength sidelength))
+                                    :element-type '(unsigned-byte 8)
+                                    :adjustable nil
+                                    :initial-element #x00))
+        (cx 0) (cy 0)
+        (cx* 0) (cy* 0))
+    (mapcar
+     (lambda (name pixels width height)
+       (blit-image cx* cy* width height pixels
+                  sidelength sidelength new-image-data)
+       (si (pathname-name name)
+          `(,width ,height
+                   ,@(mapcar #'(lambda (x) (/ x sidelength 1.0))
+                             (list cx* cy* (+ cx* width) (+ cy* height)))))
+       (incf cx)
+       (cond ((= cx optimal-x-num)
+             (incf cy)
+             (incf cy* max-height)
+             (setf cx 0 cx* 0))
+            (T (incf cx* max-width))))
+     names pixeldata widths heights)
+    (setf *spritesheet* (list new-image-data sidelength))))
+
 
 (defun init-files ()
   "Load the relevant files into variables"