Great, many thanks!
BTW: I'm just in the middle of updating some Cocoa wrapper classes to use LCMS 2.0. Since the "internals" of LCMS changed a lot from 1.x to 2.x some refactoring is needed. But the new concept of Pipelines is awesome! Thank's a lot Marti. This is an awesome library. Best regards Mark On 29.05.2010, at 15:57, marti.ma...@littlecms.com wrote: > > Hi Mark, > > I see. The formatter selection code does revert > your types to the generic formatter instead of > using the Lab template. As a result Lab space > is encoded in range 0..1.0 instead of 0..100, > -127...+128. > > Ok, it may be regarded as a bug, and I have it > already fixed. Will commit the changes on git > probably on monday, as right now the server > where I keep the sandbox is down. > > Thanks for reporting. > Marti > > > > Quoting Mark <d...@cine-scan.com>: > >> Hi, >> >> I'd like to use 16 byte float pixels for RGA, Lab and XYZ conversions - so I >> tried defining these: >> >> #define TYPE_XYZA_FLT >> (FLOAT_SH(1)|COLORSPACE_SH(PT_XYZ)|EXTRA_SH(1)|CHANNELS_SH(3)|BYTES_SH(4)) >> #define TYPE_LabA_FLT >> (FLOAT_SH(1)|COLORSPACE_SH(PT_Lab)|EXTRA_SH(1)|CHANNELS_SH(3)|BYTES_SH(4)) >> #define TYPE_RGBA_FLT >> (FLOAT_SH(1)|COLORSPACE_SH(PT_RGB)|EXTRA_SH(1)|CHANNELS_SH(3)|BYTES_SH(4)) >> >> But it looks like something is wrong. >> >> Using the LCMS built in formats (TYPE_RGB_FLT, TYPE_XYZ_FLT, TYPE_Lab_FLT) I >> get the following: >> >> sRGB -> XYZ -> sRGB >> 1.000000, 1.000000, 1.000000 >> 0.964200, 1.000000, 0.824900 >> 1.000000, 1.000000, 1.000000 >> >> sRGB -> Lab -> sRGB >> 1.000000, 1.000000, 1.000000 >> 100.000000, 0.000008, -0.000008 >> 1.000000, 1.000000, 1.000000 >> >> Lab -> XYZ -> Lab >> 100.000000, 0.000000, 0.000000 >> 0.964200, 1.000000, 0.824900 >> 100.000000, 0.000008, 0.000008 >> >> >> Using the formats I defined (TYPE_XYZA_FLT, TYPE_LabA_FLT, TYPE_RGBA_FLT): >> >> sRGB -> XYZ -> sRGB >> 1.000000, 1.000000, 1.000000, 0.000000 >> 0.482107, 0.500008, 0.412456, 0.000000 >> 1.000000, 1.000000, 1.000000, 0.000000 >> >> sRGB -> Lab -> sRGB >> 1.000000, 1.000000, 1.000000, 0.000000 >> 1.000000, 0.501961, 0.501961, 0.000000 >> 1.000000, 1.000000, 1.000000, 0.000000 >> >> Lab -> XYZ -> Lab >> 100.000000, 0.000000, 0.000000, 0.000000 >> 307598.437500, 321873.781250, 271461.625000, 0.000000 >> 100.000000, -0.000001, 0.000000, 0.000000 >> >> Any ideas what I'm doing wrong? >> >> Thanks >> Mark >> >> >> > > ------------------------------------------------------------------------------ _______________________________________________ Lcms-user mailing list Lcms-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/lcms-user
