Good day folks,

the included patch (also available via git[1]) adds a bridge to PNG-READ[2] by Jakub Higersberger, adding pure CL PNG support to McCLIM.

diff --git a/Extensions/Bitmap-formats/png.lisp b/Extensions/Bitmap-formats/png.lisp new file mode 100644 index 0000000..3c75b13 --- /dev/null +++ b/Extensions/Bitmap-formats/png.lisp @@ -0,0 +1,44 @@ +;;; -*- Mode: Lisp; Package: MCCLIM-IMAGES -*- + +;;; (c) copyright 2009 by +;;; Samium Gromoff (_deepfire@feelingofgreen.ru) + +;;; This library is free software; you can redistribute it and/or +;;; modify it under the terms of the GNU Library 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 +;;; Library General Public License for more details. +;;; +;;; You should have received a copy of the GNU Library 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. + +(in-package :clim-internals) + +(define-bitmap-file-reader :png (image-pathname) + (let* ((png-state (png-read:read-png-file image-pathname)) + (data (png-read:image-data png-state)) + (depth (png-read:bit-depth png-state)) + (height (png-read:height png-state)) + (width (png-read:width png-state)) + (array (make-array (list height width) :element-type '(unsigned-byte 32)))) + (unless (member depth '(8 32)) + (error "~@<PNG-encoded images with bit depth ~D are not supported. The only supported bit depths are 8 and 32.~:@>" depth)) + (dotimes (y height) + (dotimes (x width) + (case depth + ((8 32) + (let ((red (aref data x y 0)) + (green (aref data x y 1)) + (blue (aref data x y 2))) + (setf (aref array y x) + (dpb red (byte 8 0) + (dpb green (byte 8 8) + (dpb blue (byte 8 16) + (dpb (- 255 0) (byte 8 24) 0)))))))))) + array)) diff --git a/mcclim-png-bitmaps.asd b/mcclim-png-bitmaps.asd new file mode 100644 index 0000000..0a63f70 --- /dev/null +++ b/mcclim-png-bitmaps.asd @@ -0,0 +1,24 @@ +;;; -*- Mode: Lisp -*- + +;;; (c) copyright 2009 by +;;; Samium Gromoff (_deepfire@feelingofgreen.ru) +;;; +;;; This library is free software; you can redistribute it and/or +;;; modify it under the terms of the GNU Library 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 +;;; Library General Public License for more details. +;;; +;;; You should have received a copy of the GNU Library 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. + +(asdf:defsystem :mcclim-png-bitmaps + :description "Support for PNG images in McCLIM bitmap reading functions." + :depends-on (:mcclim :png-read) + :components ((:file "png" :pathname #P"Extensions/Bitmap-formats/png")))

regards, Samium Gromoff -- 1. git://git.feelingofgreen.ru/mcclim, branch 'png-bitmaps' 2. git://github.com/Ramarren/png-read.git

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