A Dilluns, 21 de març de 2011, Thomas Freitag va escriure: > Hi all! > 4. Support of overprint in pdftoppm > To support overprint in pdftoppm we have to enable SPLASH_CMYK in > pdftoppm and use it for rendering. But all output formats defined in > pdftoppm uses RGB as output colorspace, and even the main output formats > ppm and png do not support CMYK colorspace. Therefore we have to > possibilities to support overprinting in pdftoppm: > a) The easiest way would be to specify a new output format like i.e. > jpegcmyk and create a jpeg image in CMYK colorspace where overprinting > will be supported. > b) The more interesting way is to add a new parameter -overprint, when > set use splashCMYK8 as colorMode and when writing the output file > convert it to RGB. The first implementation could use the poor > colorspace conversion in Splash to convert the CMYK bitmap to RGB, but > we should think of use little cms to do that work for us, which of > course means that compiling pdftoppm will become more complex. > > Any suggestions from the community to point 4?
Both seem interesting :-) Albert > > Thomas > > _______________________________________________ > poppler mailing list > [email protected] > http://lists.freedesktop.org/mailman/listinfo/poppler _______________________________________________ poppler mailing list [email protected] http://lists.freedesktop.org/mailman/listinfo/poppler
