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2009.12.28 16:59 "Re: bug in tiff2pdf, when handling Lab images", by Lee Howard
Manlio Perillo wrote: > I'm reporting the bug here, since on the libtiff web site > (http://www.libtiff.org/bugs.html), the link to the bug traker is broken: > That's the "old" domain before it was hijacked. Now look for: http://remotesensing.org/libtiff/ > http://bugzilla.remotesensing.org/buglist.cgi?product=libtiff > http://remotesensing.org/libtiff/bugs.html > By the way, the link to this mailing list is broken, too. > Not surprising. > The problem is with tiff2pdf writing two times the WhitePoint entry in > the Lab dictionary: > > /ColorSpace [/Lab << > /WhitePoint [0.9643 1.0000 0.8251] > [0.9643 1.0000 0.8251] > /Range [-127 127 -127 127] > >>> ] If you look at the code this appears to be intentional: if(t2p->pdf_colorspace & T2P_CS_LAB){ written += t2pWriteFile(output, (tdata_t) "[/Lab << \n", 10); written += t2pWriteFile(output, (tdata_t) "/WhitePoint ", 12); X_W = t2p->tiff_whitechromaticities[0]; Y_W = t2p->tiff_whitechromaticities[1]; Z_W = 1.0F - (X_W + Y_W); X_W /= Y_W; Z_W /= Y_W; Y_W = 1.0F; buflen=sprintf(buffer, "[%.4f %.4f %.4f] \n", X_W, Y_W, Z_W); written += t2pWriteFile(output, (tdata_t) buffer, buflen); X_W = 0.3457F; /* 0.3127F; */ /* D50, commented D65 */ Y_W = 0.3585F; /* 0.3290F; */ Z_W = 1.0F - (X_W + Y_W); X_W /= Y_W; Z_W /= Y_W; Y_W = 1.0F; buflen=sprintf(buffer, "[%.4f %.4f %.4f] \n", X_W, Y_W, Z_W); written += t2pWriteFile(output, (tdata_t) buffer, buflen); written += t2pWriteFile(output, (tdata_t) "/Range ", 7); buflen=sprintf(buffer, "[%d %d %d %d] \n", t2p->pdf_labrange[0], t2p->pdf_labrange[1], t2p->pdf_labrange[2], t2p->pdf_labrange[3]); written += t2pWriteFile(output, (tdata_t) buffer, buflen); written += t2pWriteFile(output, (tdata_t) ">>] \n", 5); } Are you sure that this is the problem? Are you sure that it's not something else? Thanks, Lee.