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hh-web-tags / images.lisp

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;; Copyright (c) 2010 Phil Hargett

;; 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.

(in-package :hh-web-tags)

(export `( image get-package-font ))

(defun get-package-font (package font)
  (let* ((font-directory (asdf:system-relative-pathname package 
						       (make-pathname :directory `(:relative "www" "fonts") )))
	(font-file (merge-pathnames (make-pathname :name font :type "ttf") font-directory)))
    (get-font font-file)))

(defmacro image ((&key width height) &rest body)
  "Captures calls to vecto to generate an image"
  `(values (flexi-streams:with-output-to-sequence (os)
	     (with-canvas (:width ,width :height ,height)
	       ,@body
	       (save-png-stream os)))
	   "image/png"))