TR Postscript to PNG \\ How to convert Postscript or PDF images into PNG format. 1.1 Artwork For artwork that is transparent in undrawn-upon areas: {code:none} gs -dSAFTER -dBATCH -dNOPAUSE -sDEVICE=pngalpha \\\ -dBackgroundColor='16#ffeebb' \\\ -sOutputFile=~~output~~.png ~~input.eps~~ {code} The __-BackgroundColor='16#ffeebb'__ option sets the fall-back background color in the resulting PNG image to match the background color of the Community Projects site. This is needed by browsers that don't properly support PNG alpha transparency, (i.e., Internet Explorer), which will otherwise render the image horribly. If the page size isn't specified in the document that you're converting, you may need to set it manually by adding the options __-dDEVICEWIDTHPOINTS=~~w~~ -dDEVICEHEIGHTPOINTS=~~h~~__; otherwise, your resulting PNG file may be the size of a default sheet, typically U.S. letter. If your input document is in EPS format, the __-dEPSCrop__ option will set the correct size automatically. Otherwise, the correct values for ~~w~~ and ~~h~~ can often be determined from the bounding-box comments in the input document, which can be retrieved as follows: {code:none} gs -dSAFTER -dBATCH -dNOPAUSE -sDEVICE=bbox ~~input.ps~~ {code} Then just pick out the right and bottom coordinates from the output: {code:none} %%BoundingBox: 8 13 __487 499__ %%HiResBoundingBox: 8.424000 13.626000 486.953985 498.559968 {code} In this example, ~~w~~=487 and ~~h~~=499. Ref: http://www.cs.wisc.edu/~ghost/doc/cvs/Devices.htm#PNG 1.1 Thumbnails of PDF-based presentations {code:none} gs -dSAFTER -dBATCH -dNOPAUSE -sDEVICE=png16m \\\ -dGraphicsAlphaBits=4 -dTextAlphaBits=4 \\\ -dBackgroundColor='16#ffeebb' -r45 \\\ -sOutputFile=LectroTestTalk-%02d.png \\\ -dFirstPage=1 -dLastPage=1 ../pgh-pm-talk-lectrotest.pdf {code} The __-r45__ flag tells ghostscript to use a 45-ppi rendering resolution. 2007-10-03 21:51:41.187 2004-09-09 00:36:38.161