CMYK support?

[Justanick]

Does Xnview support cmyk ? Can i convert an rgg image > cmyk ???
Tnx a lot.

[xnview]

Does Xnview support cmyk ? Can i convert an rgg image > cmyk ???
Tnx a lot.

No sorry

[roytam1]

Does Xnview support cmyk ? Can i convert an rgg image > cmyk ???
Tnx a lot.

No sorry

maybe xnview should notify user when opening CMYK images at the moment.

but implementing RGB<->CMYK is not hard at all.
FYI: there's Java reference code:

Code: Select all

 public int[] rgb2cmyk(int R,int G,int B){
  int cmyk []= new int[4];
  cmyk[3]=(int)(Math.min(Math.min(255-R,255-G),255-B)/2.55);//cmykK
  int MyR = (int)(R/2.55);
  int Div = 100-cmyk[3];
  if (Div == 0)Div = 1;
  cmyk[0] = ((100-MyR-cmyk[3])/Div)*100;//cmykC
  int MyG = (int)(G/2.55);
  cmyk[1] = ((100-MyG-cmyk[3])/Div)*100;
  int MyB = (int)(B/2.55);
  cmyk[2] = ((100-MyB-cmyk[3])/Div)*100;
  
  return cmyk;
 }
 public Color cmyk2rgb(int C,int M,int Y,int K){
  float MyC = C/100;
  float MyM = M/100;
  float MyY = Y/100;
  float MyK = K/100;
  
  int R = (int)((1-(MyC*(1-MyK)+MyK))*255);
  int G = (int)((1-(MyM*(1-MyK)+MyK))*255);
  int B = (int)((1-(MyY*(1-MyK)+MyK))*255);
  
  if (R<0) R=0;
  if (G<0) G=0;
  if (B<0>255) R=255;
  if (G>255) G=255;
  if (B>255) B=255;
  
  Color rgb = new Color(R,G,B);
  return rgb;
 }

[Troken]

... maybe xnview should notify user when opening CMYK images at the moment. ...

Very nice suggestion, I support it! It could be a notifications with a checkbox "Do not show again". This way, new users will be informed and thus reduce confusion about CMYK.

[oops66]

+1

[JohnFredC]

+1

[oops66]

Done into the V1.96Beta1,
Thanks Pierre

[JohnFredC]

I guess I'm slow. Where is the CMYK conversion?

[oops66]

maybe xnview should notify user when opening CMYK images at the moment.

Right, only this request above is done into V1.96, not the conversion.

[Dstruct]

Does Xnview support cmyk ? Can i convert an rgg image > cmyk ???
Tnx a lot.

No sorry

Why not?

[oops66]

For Information on my computer: Now the conversion is done with the V1.96.5 version between CMYK (32 bits) and RGB (8 bits per component = 24 bits) plus a xnview window notification.
Thanks Pierre.

[surfacecleanerz]

Hi,
I have some files which I converted from RGB .svg (from inkscape) via KDE Krita to CMYK .pdf, but Xnview tells me they are RGB, which is correct? Is Xnview able to do this conversion also? Where is it to find?

The .pdf files look very different in Xnview than in Adobe Acrobat Reader. I think there is an problem within Xnview! I'm using v1.97.2 under Win XP.

regards,
Stefan

[xnview]

XnView can't convert SVG files. CMYK pdf can be different in XnView...

[surfacecleanerz]

Hi,
ok, but why shows Xnview that the CMYK pdf is RGB?

Should I send you the files?

regards,
Stefan

[xnview]

Yes please send me it