New function SLICE-ALLOC and changes to user data mechanism

[clg] / rsvg / rsvg.lisp

;; Common Lisp bindings for librsvg
;; Copyright 2005 Espen S. Johnsen <espen@users.sf.net>
;;
;; Permission is hereby granted, free of charge, to any person obtaining
;; a copy of this software and associated documentation files (the
;; "Software"), to deal in the Software without restriction, including
;; without limitation the rights to use, copy, modify, merge, publish,
;; distribute, sublicense, and/or sell copies of the Software, and to
;; permit persons to whom the Software is furnished to do so, subject to
;; the following conditions:
;;
;; The above copyright notice and this permission notice shall be
;; included in all copies or substantial portions of the Software.
;;
;; THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
;; EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
;; MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
;; IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
;; CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
;; TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
;; SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

;; $Id: rsvg.lisp,v 1.8 2007/06/18 11:39:43 espen Exp $

(in-package "RSVG")


(eval-when (:compile-toplevel :load-toplevel :execute)
  (init-types-in-library rsvg "librsvg-2" :prefix "rsvg_")

  (define-types-by-introspection "Rsvg"
    ("RsvgError" :ignore t)))


(defbinding init () nil)
(defbinding term () nil)

(defbinding (set-default-dpi "rsvg_set_default_dpi_x_y") (dpi-x &optional (dpi-y dpi-x)) nil
  (dpi-x double-float)
  (dpi-y double-float))


(defbinding handle-write () boolean
  (handle handle)
  (data (vector (integer 8)))
  ((length data) int)
  (nil gerror-signal :out))

(defbinding handle-close () boolean
  (handle handle)
  (nil gerror-signal :out))

(defbinding (handle-get-pixbuf "rsvg_handle_get_pixbuf_sub") (handle &optional id) boolean
  (handle handle)
  (id (or null string)))


(defbinding %handle-new-from-data () pointer
  (data string)
  ((1- (utf8-length data)) int)
  (nil gerror-signal :out))

(defbinding %handle-new-from-file () pointer
  (filename pathname)
  (nil gerror-signal :out))

(defmethod allocate-foreign ((handle handle) &key data filename)
  (cond 
   (filename (%handle-new-from-file filename))
   (data (%handle-new-from-data data))
   (t (call-next-method))))


;;; Cairo interface

(defbinding (render-cairo "rsvg_handle_render_cairo_sub") (handle cr &optional id) nil
  (handle handle)
  (cr cairo:context)
  (id (or null string)))