mdw@git.distorted.org.uk Git - clg/blob - gdk/pixbuf.lisp

   1 ;; Common Lisp bindings for GTK+ v2.x
   2 ;; Copyright 2004-2005 Espen S. Johnsen <espen@users.sf.net>
   3 ;;
   4 ;; Permission is hereby granted, free of charge, to any person obtaining
   5 ;; a copy of this software and associated documentation files (the
   6 ;; "Software"), to deal in the Software without restriction, including
   7 ;; without limitation the rights to use, copy, modify, merge, publish,
   8 ;; distribute, sublicense, and/or sell copies of the Software, and to
   9 ;; permit persons to whom the Software is furnished to do so, subject to
  10 ;; the following conditions:
  11 ;;
  12 ;; The above copyright notice and this permission notice shall be
  13 ;; included in all copies or substantial portions of the Software.
  14 ;;
  15 ;; THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  16 ;; EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  17 ;; MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
  18 ;; IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
  19 ;; CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  20 ;; TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  21 ;; SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  22
  23 ;; $Id: pixbuf.lisp,v 1.6 2007-06-18 10:14:39 espen Exp $
  24
  25
  26 (in-package "GDK")
  27
  28 (defbinding pixbuf-get-option () (copy-of string)
  29   (pixbuf pixbuf)
  30   (key string))
  31
  32 (defbinding %pixbuf-new-from-file () (referenced pixbuf)
  33   (filename pathname)
  34   (nil gerror :out))
  35
  36 (defbinding %pixbuf-new-from-file-at-size () (referenced pixbuf)
  37   (filename pathname)
  38   (width int)
  39   (height int)
  40   (nil gerror :out))
  41
  42 #?(pkg-exists-p "gtk+-2.0" :atleast-version "2.6.0")
  43 (defbinding %pixbuf-new-from-file-at-scale () (referenced pixbuf)
  44   (filename pathname)
  45   (width int)
  46   (height int)
  47   (preserve-aspect-ratio boolean)
  48   (nil gerror :out))
  49
  50 (defun pixbuf-load (filename &key width height size (preserve-aspect-ratio t))
  51   #?-(pkg-exists-p "gtk+-2.0" :atleast-version "2.6.0")
  52   (unless preserve-aspect-ratio
  53     (warn ":preserve-aspect-ratio not supported with this version of Gtk"))
  54
  55   (multiple-value-bind (pixbuf gerror)
  56       (cond
  57        (size
  58         #?-(pkg-exists-p "gtk+-2.0" :atleast-version "2.6.0")
  59         (%pixbuf-new-from-file-at-size filename size size)
  60         #?(pkg-exists-p "gtk+-2.0" :atleast-version "2.6.0")
  61         (%pixbuf-new-from-file-at-scale filename size size preserve-aspect-ratio))
  62        ((and width height)
  63         #?-(pkg-exists-p "gtk+-2.0" :atleast-version "2.6.0")
  64         (%pixbuf-new-from-file-at-size filename width height)
  65         #?(pkg-exists-p "gtk+-2.0" :atleast-version "2.6.0")
  66         (%pixbuf-new-from-file-at-scale filename width height preserve-aspect-ratio))
  67        ((or width height)
  68         (error "Both :width and :height must be specified"))
  69        (t (%pixbuf-new-from-file filename)))
  70     (if gerror
  71         (signal-gerror gerror)
  72       pixbuf)))
  73
  74
  75 ;; (defbinding pixbuf-get-file-info () (copy-of pixbuf-format)
  76 ;;   (filename pathname)
  77 ;;   (width int :out)
  78 ;;   (height int :out))
  79
  80 (defbinding %pixbuf-savev () boolean
  81   (pixbuf pixbuf)
  82   (filename pathname)
  83   (type string)
  84   (keys strings)
  85   (values strings)
  86   (nil gerror :out))
  87
  88 (defun pixbuf-save (pixbuf filename type &rest options)
  89   (let ((keys (make-array 0 :adjustable t :fill-pointer t))
  90         (values (make-array 0 :adjustable t :fill-pointer t)))
  91     (loop
  92      as (key value . rest) = options then rest
  93      while key
  94      do (vector-push-extend (string-downcase key) keys)
  95         (vector-push-extend
  96          (etypecase value
  97            (string value)
  98            (symbol (string-downcase value))
  99            (number (format nil "~A" value)))
 100          values))
 101     (multiple-value-bind (ok-p gerror)
 102         (%pixbuf-savev pixbuf filename (string-downcase type) keys values)
 103       (unless ok-p
 104         (signal-gerror gerror)))))
 105
 106 (defbinding pixbuf-new-from-xpm-data () (referenced pixbuf)
 107   (data (vector string)))
 108
 109 (defbinding %pixbuf-new-subpixbuf () pixbuf ;; or (referenced pixbuf)?
 110   (pixbuf pixbuf)
 111   (x int) (y int) (width int) (height int))
 112
 113 (defbinding %pixbuf-copy () (referenced pixbuf)
 114   (pixbuf pixbuf))
 115
 116 (defun copy-pixbuf (pixbuf &optional x y width height)
 117   (if (and (not x) (not y) (not width) (not height))
 118       (%pixbuf-copy pixbuf)
 119     (%pixbuf-new-subpixbuf pixbuf x y width height)))
 120
 121 (defbinding %pixbuf-get-from-drawable () (referenced pixbuf)
 122   (dest (or null pixbuf))
 123   (drawable drawable)
 124   (colormap (or null colormap))
 125   (src-x int)
 126   (src-y int)
 127   (dest-x int)
 128   (dest-y int)
 129   (width int)
 130   (height int))
 131
 132 (defun pixbuf-get-from-drawable (drawable &key (src-x 0) (src-y 0) (dest-x 0) (dest-y 0) width height colormap dest)
 133   (unless (or (and width height) (not (typep drawable 'window)))
 134     (error "Width and height must be specified for windows"))
 135   (or
 136    (%pixbuf-get-from-drawable dest drawable
 137     (cond
 138      (colormap)
 139      ((slot-boundp drawable 'colormap) nil)
 140      ((colormap-get-system)))
 141     src-x src-y dest-x dest-y (or width -1) (or height -1))
 142    (error "Couldn't get pixbuf from drawable")))
 143
 144
 145 ;;; Utilities
 146
 147 (defbinding pixbuf-add-alpha
 148     (pixbuf &optional substitute-color (red 255) (green 255) (blue 255))
 149     (referenced pixbuf)
 150   (pixbuf pixbuf)
 151   (substitute-color boolean)
 152   (red (unsigned 8))
 153   (green (unsigned 8))
 154   (blue (unsigned 8)))