Re: Transparency error when converting a png to bmp
张铎 <[email protected]>
| Newsgroups | gmane.comp.video.graphicsmagick.help |
|---|---|
| Message-ID | <CAAAYAnMzhNUYYrNO_ZMRxmwucxxD-PWUXwNQrPUCXkbB+OSDhQ@mail.gmail.com> |
Got it. Thanks. 2015-08-18 11:22 GMT+08:00 Bob Friesenhahn <[email protected]>: > On Tue, 18 Aug 2015, 张铎 wrote: > > Thanks! So will it be fixed in the next release? >> > > Yes. It is fixed in Mercurial (source code control) already. > > Bob > > > >> 2015-08-17 21:29 GMT+08:00 Bob Friesenhahn <[email protected] >> >: >> On Mon, 17 Aug 2015, 张铎 wrote: >> >> Modify coders/bmp.c, change line 1736 from >> *q++=ScaleQuantumToChar(p->opacity); to >> *q++=MaxRGB-ScaleQuantumToChar(p->opacity); >> >> It fix my problem but I'm not sure whether it is the >> right approach. >> >> >> This is likely a more appropriate fix: >> >> if (bmp_info.bits_per_pixel == 32) >> *q++==ScaleQuantumToChar(MaxRGB-p->opacity); >> >> since otherwise there will be a problem for anything but the Q8 >> build. >> >> The alpha channel is inverted in GraphicsMagick from the way it is >> stored in most file formats. >> >> Bob >> -- >> Bob Friesenhahn >> [email protected], >> http://www.simplesystems.org/users/bfriesen/ >> GraphicsMagick Maintainer, http://www.GraphicsMagick.org/ >> >> ------------------------------------------------------------------------------ >> >> _______________________________________________ >> Graphicsmagick-help mailing list >> [email protected] >> https://lists.sourceforge.net/lists/listinfo/graphicsmagick-help >> >> >> >> >> > -- > Bob Friesenhahn > [email protected], http://www.simplesystems.org/users/bfriesen/ > GraphicsMagick Maintainer, http://www.GraphicsMagick.org/ > > > ------------------------------------------------------------------------------ > > _______________________________________________ > Graphicsmagick-help mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/graphicsmagick-help > > ------------------------------------------------------------------------------ _______________________________________________ Graphicsmagick-help mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/graphicsmagick-help