Update of /project/imago/cvsroot/imago/src In directory clnet:/tmp/cvs-serv10578

Modified Files: file-pnm.lisp Log Message: Allow writing indexed images as PNM files, ascii or binary

--- /project/imago/cvsroot/imago/src/file-pnm.lisp 2005/01/06 22:41:42 1.3 +++ /project/imago/cvsroot/imago/src/file-pnm.lisp 2006/09/28 20:54:31 1.4 @@ -136,7 +136,25 @@ (with-write-pnm-loop (stream x y pixels 5 255) (write-char (code-char (image-pixel image x y)) stream))))

-(defmethod write-pnm-to-stream ((image indexed-image) filespec - output-format) - (error "PNM format not supported for indexed images.")) +(defmethod write-pnm-to-stream ((image indexed-image) stream + (output-format (eql :ascii))) + (let ((pixels (image-pixels image)) + (color-map (image-colormap image))) + (with-write-pnm-loop (stream x y pixels 3 255) + (let ((pixel-rgb (aref color-map (image-pixel image x y)))) + (format stream "~A ~A ~A~%" + (color-red pixel-rgb) + (color-green pixel-rgb) + (color-blue pixel-rgb)))))) + +(defmethod write-pnm-to-stream ((image indexed-image) stream + (output-format (eql :binary))) + (let ((pixels (image-pixels image)) + (color-map (image-colormap image))) + (with-write-pnm-loop (stream x y pixels 6 255) + (let ((pixel-rgb (aref color-map (image-pixel image x y)))) + (write-char (code-char (color-red pixel-rgb)) stream) + (write-char (code-char (color-green pixel-rgb)) stream) + (write-char (code-char (color-blue pixel-rgb)) stream))))) +