| #!/bin/sh |
| # |
| # png2uri version 1.0.2, July 4, 2012. |
| # |
| # NO COPYRIGHT RIGHTS ARE CLAIMED TO THIS SOFTWARE. |
| # |
| # To the extent possible under law, the author has waived all copyright and |
| # related or neighboring rights to this work. This work is published from |
| # the United States of America in 2012. |
| # |
| # This png2uri software may be used freely in any way. |
| # |
| # The source is the original work of the person named below. No other person |
| # or organization has made contributions to this work. |
| # |
| # ORIGINAL AUTHORS |
| # The following people have contributed to the code or comments in this |
| # file. None of the people below claim any rights with regard to the |
| # contents of this file. |
| # |
| # Glenn Randers-Pehrson <glennrp@users.sourceforge.net> |
| # |
| # png2uri is a command-line application that creates an HTML "img" tag on |
| # standard output containing a data URI in accordance with RFC-2397, from |
| # a PNG file or from a PNG datastream received from standard input. |
| # Other formats besides the default, PNG, are supported, via the "-f or |
| # --format option or, if that option was not supplied, by inspection of the |
| # filename extension. |
| # |
| # Usage: png2uri [-f type|--format type] [-u|--uri_only] [file] |
| # |
| # options: -f|--format TYPE: |
| # write "image/TYPE" instead of "image/png" in the |
| # data uri. TYPE can be png, jpg, jpeg, bmp, or gif, |
| # or any of those in upper case. To write any other |
| # type, include the complete MIME type as in |
| # "--format image/x-jng" or "-f audio/mpeg". |
| # |
| # -u|--uri_only|--url_only |
| # omit the surrounding "img" tag and only write the |
| # data URI. |
| # |
| # Requires /bin/sh and a uuencode(1) that takes the "-m" option to mean |
| # to encode in base64 according to RFC-3548, and a working "sed". |
| # |
| # If you prefer a web-based converter or a java application, this isn't |
| # it. Use your search engine and look for "png data uri" to find one. |
| # |
| |
| uri_only="false" |
| format="unknown" |
| |
| while true |
| do |
| case x$1 in |
| x-f|x--format) |
| shift |
| case x$1 in |
| xpng|xPNG) |
| format=image/png |
| ;; |
| xjpeg|xJPEG|xjpg|xJPG) |
| format=image/jpeg |
| ;; |
| xbmp|xBMP) |
| format=image/bmp |
| ;; |
| xgif|xGIF) |
| format=image/gif |
| ;; |
| *) |
| format=$1 |
| ;; |
| esac |
| shift |
| ;; |
| x-u|x--ur*) |
| uri_only="true" |
| shift |
| ;; |
| x) |
| # Convert standard input. |
| case $format in |
| unknown) |
| format=image/png |
| ;; |
| esac |
| case $uri_only in |
| true) |
| echo "data:$format;base64," |
| uuencode -m ==== | grep -v ==== |
| ;; |
| false) |
| echo "<img alt=\"PNG\" title=\"PNG\" src=\"data:$format;base64," |
| uuencode -m ==== | grep -v ==== |
| echo "\">" |
| ;; |
| esac |
| exit |
| ;; |
| *) |
| # Convert the named file. |
| case $format in |
| unknown) |
| format=image/png |
| extension=`echo $1 | sed "s/.*\.//"` |
| case x$extension in |
| xjpeg|xJPEG|xjpg|xJPG) |
| format=image/jpeg |
| ;; |
| xbmp|xBMP) |
| format=image/bmp |
| ;; |
| xgif|xGIF) |
| format=image/gif |
| ;; |
| esac |
| ;; |
| esac |
| case $uri_only in |
| true) |
| echo "data:$format;base64," |
| uuencode -m $1 ==== | grep -v ==== |
| ;; |
| false) |
| echo "<img alt=\"$1\" title=\"$1\" src=\"data:$format;base64," |
| uuencode -m $1 ==== | grep -v ==== |
| echo "\">" |
| ;; |
| esac |
| exit |
| ;; |
| esac |
| done |