Initial checkin

[clg] / gdk / pixbuf.lisp

diff --git a/gdk/pixbuf.lisp b/gdk/pixbuf.lisp
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+;; Common Lisp bindings for GTK+ v2.0
+;; Copyright (C) 2004 Espen S. Johnsen <espen@users.sf.net>
+;;
+;; This library is free software; you can redistribute it and/or
+;; modify it under the terms of the GNU Lesser General Public
+;; License as published by the Free Software Foundation; either
+;; version 2 of the License, or (at your option) any later version.
+;;
+;; This library is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+;; Lesser General Public License for more details.
+;;
+;; You should have received a copy of the GNU Lesser General Public
+;; License along with this library; if not, write to the Free Software
+;; Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
+;; $Id: pixbuf.lisp,v 1.1 2004-12-28 20:26:01 espen Exp $
+
+
+(in-package "GDK")
+
+(defbinding pixbuf-get-option () (copy-of string)
+  (pixbuf pixbuf)
+  (key string))
+
+(defbinding %pixbuf-new-from-file () (referenced pixbuf)
+  (filename pathname)
+  (nil null))
+
+(defbinding %pixbuf-new-from-file-at-size () (referenced pixbuf)
+  (filename pathname)
+  (width int)
+  (height int)
+  (nil null))
+
+#+gtk2.6
+(defbinding %pixbuf-new-from-file-at-scale () (referenced pixbuf)
+  (filename pathname)
+  (width int)
+  (height int)
+  (preserve-aspect-ratio boolean)
+  (nil null))
+
+(defun pixbuf-load (filename &key width height size (preserve-aspect-ratio t))
+  #-gtk2.6
+  (unless preserve-aspect-ratio 
+    (warn ":preserve-aspect-ratio not supported with this version of Gtk"))
+
+  (cond
+   (size 
+    #-gtk2.6(%pixbuf-new-from-file-at-size filename size size)
+    #+gtk2.6(%pixbuf-new-from-file-at-scale filename size size preserve-aspect-ratio))
+   ((and width height)
+    #-gtk2.6(%pixbuf-new-from-file-at-size filename width height)
+    #+gtk2.6(%pixbuf-new-from-file-at-scale filename width height preserve-aspect-ratio))
+   ((or width height)
+    (error "Both :width and :height must be specified"))
+   ((%pixbuf-new-from-file filename))))
+
+
+;; (defbinding pixbuf-get-file-info () (copy-of pixbuf-format)
+;;   (filename pathname)
+;;   (width int :out)
+;;   (height int :out))
+
+(defbinding %pixbuf-savev () boolean
+  (pixbuf pixbuf)
+  (filename pathname)
+  (type string)
+  (keys (vector (or null string)))
+  (values (vector (or null string)))
+  (nil null))
+
+(defun pixbuf-save (pixbuf filename type &rest options)
+  (let ((keys (make-array 0 :adjustable t :fill-pointer t))
+       (values (make-array 0 :adjustable t :fill-pointer t)))
+    (loop 
+     as (key value . rest) = options then rest
+     do (vector-push-extend (string-downcase key) keys)
+        (vector-push-extend 
+        (etypecase value 
+          (string value)
+          (symbol (string-downcase value))
+          (number (format nil "~A" value)))
+        values))
+    (vector-push-extend nil keys)
+    (vector-push-extend nil values)
+    (%pixbuf-savev pixbuf filename type keys values)))
+
+(defbinding pixbuf-new-from-xpm-data () (referenced pixbuf)
+  (data (vector string)))
+
+(defbinding %pixbuf-new-subpixbuf () pixbuf ;; or (referenced pixbuf)?
+  (pixbuf pixbuf)
+  (x int) (y int) (width int) (height int))
+
+(defbinding %pixbuf-copy () (referenced pixbuf)
+  (pixbuf pixbuf))
+
+(defun copy-pixbuf (pixbuf &optional x y width height)
+  (if (and (not x) (not y) (not width) (not height))
+      (%pixbuf-copy pixbuf)
+    (%pixbuf-new-subpixbuf pixbuf x y width height)))
+
+
+;;; Utilities
+
+(defbinding pixbuf-add-alpha 
+    (pixbuf &optional substitute-color (red 255) (green 255) (blue 255))
+    (referenced pixbuf)
+  (pixbuf pixbuf)
+  (substitute-color boolean)
+  (red (unsigned 8))
+  (green (unsigned 8))
+  (blue (unsigned 8)))