Re: [Lcms-user] Scanline Transform

[Armindo Da S. <tec...@wa...>]

Hi Marti,

thanks for your tips, it works fine.
You new web site is very nice.

Your delphi sample is very interesting in particular concerning the icc =
files inside the combobox.....

thanks

Armindo


  Hi,

  Just build your own descriptor:

  #define TYPE_LabA_8      =
(COLORSPACE_SH(PT_Lab)|CHANNELS_SH(3)|BYTES_SH(1)|EXTRA_SH(1))

  In delphi this equals to $a0099=20


  Regards,
  Marti.



    Hello,

    in a 24 bits bitmap, instead of storing rgb value I store Lab value,
    I do some process and then I convert it to RGB with

    cmsDoTransform(hTransform, TheScanline, TheScanline, TheWidth);
    where
    hTransform :=3D cmsCreateTransform(LabProfile,
                    TYPE_Lab_8,
                    DisplayProfile,
                    TYPE_BGR_8,
                    INTENT_PERCEPTUAL,0);

    it works fine

    now I want to do the same with a 32 bits picture where instead of =
Having RGBA I have LabA

    but now how can I do my transform with scaline? the problem for me =
is that the TYPE_Lab_8 is only 3 bytes.

    Any idea?

    thanks

    Armindo