Re: [Lcms-user] Scanline Transform

[<ma...@li...>]

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.

  ----- Original Message -----=20
  From: Armindo Da Silva=20
  To: lcm...@li...=20
  Sent: Monday, December 03, 2001 11:07 AM
  Subject: [Lcms-user] Scanline Transform


  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