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C
chongl43868165
Inspiring
August 14, 2017
Resuelto

How to convert rgb image to cmyk?

  • August 14, 2017
  • 1 respuesta
  • 1177 visualizaciones

I tried 2 methods, none of them worked.

1:

  1.     AVDoc avDoc = AVAppGetActiveDoc();
  2.     PDDoc pdDoc = AVDocGetPDDoc(avDoc);
  4.     PDColorConvertParams colorParams = (PDColorConvertParams) calloc( 1 , sizeof(PDColorConvertParamsRec) ); 
  5.     PDColorConvertAction colorConvertAction = (PDColorConvertAction) calloc( 1 , sizeof( PDColorConvertActionRec ) ); 
  6.     ASBool pageChanged = false; 
  7.     AC_Profile  workingProfile;  
  8.     ACGetWorkingSpaceProfile  (kACWorkingCMYK, &workingProfile); 
  9. //Populate the PDColorConvertAction data members 
  10.     colorConvertAction[0].mMatchAttributesAny = -1;//kColorConvObj_AnyObject; 
  11.     colorConvertAction[0].mMatchSpaceTypeAny = -1;//kColorConvAnySpace; 
  12.     colorConvertAction[0].mMatchIntent= AC_UseProfileIntent; 
  13.     colorConvertAction[0].mConvertIntent = AC_UseProfileIntent; 
  14.     colorConvertAction[0].mConvertProfile= workingProfile; 
  15.     colorConvertAction[0].mEmbed = true; 
  16.     colorConvertAction[0].mPreserveBlack = true; 
  17.     colorConvertAction[0].mUseBlackPointCompensation= true; 
  18.     colorConvertAction[0].mAction = kColorConvConvert; 
  19.     colorConvertAction[0].mIsProcessColor = false; 
  20.     colorParams->mActions = colorConvertAction; 
  21.     colorParams->mNumActions = 1; 
  22.     colorParams->mInks = NULL; 
  23.     colorParams->mNumInks = 0; 
  24.     pageChanged = false; 
  25.     PDDocColorConvertPage( pdDoc , colorParams , 0 , NULL , NULL , 0 , NULL , &pageChanged ); 

2:

  1. AVDoc avDoc = AVAppGetActiveDoc();
  2. PDDoc pdDoc = AVDocGetPDDoc(avDoc);
  3. int pageCount = PDDocGetNumPages(pdDoc);
  4. for(int i=0;i<pageCount;i++)
  5. {
  6.     PDPage page = PDDocAcquirePage(pdDoc, i);
  7.     PDEContent pdeContent = PDPageAcquirePDEContent(page, gExtensionID);
  8.     ASInt32 elementCount = PDEContentGetNumElems(pdeContent);
  9.     for(int j=0;j<elementCount;j++)
  10.     {
  11.         PDEElement e = PDEContentGetElem(pdeContent, j);
  12.         ASInt32 t = PDEObjectGetType(e);
  13.         if(t == kPDEImage)
  14.         {
  15.             PDEImage pdeImage = (PDEImage)element;
  16.             PDEColorSpace space = PDEImageGetColorSpace(pdeImage);
  17.             ASAtom spaceName = PDEColorSpaceGetName(space);
  18.             if(std::string(ASSAtomGetString(spaceName)) == "DeviceCMYK")
  19.             {
  20.                 PDEColorSpace cmyk = PDEColorSpaceCreateFromName(ASAtomFromString("DeviceCMYK"));
  21.                 PDEImageSetColorSpace(pdeImage, cmyk);
  22.             }
  23.         }
  24.     }
  25.     PDPageSetPDEContent(page, gExtensionID);
  26.     PDPageNotifyContentsDidChange(page);
  27.     PDPageReleasePDEContent(page, gExtensionID);
  28.     PDPageRelease(page)
  29. }
Este tema ha sido cerrado para respuestas.
Mejor respuesta de lrosenth

The second method is a definitely fail – that won’t do any color conversion. There is an API for color converting a single PDEElement, though can’t recall it offhand.

On #1

- the BIG issue is that you aren’t setting a value for the mSize member in the ActionRec

- The second issue is that you aren’t clearing the memory and/or setting all unused fields to 0. Memory is a funny thing ☺.

- Finally, not sure why you are using -1’s instead of the proper kColorConvObj_AnyObject, etc. Use the constants, they are there for a reason

1 respuesta

lrosenth
Adobe Employee
lrosenthRespuesta
Adobe Employee
August 14, 2017

The second method is a definitely fail – that won’t do any color conversion. There is an API for color converting a single PDEElement, though can’t recall it offhand.

On #1

- the BIG issue is that you aren’t setting a value for the mSize member in the ActionRec

- The second issue is that you aren’t clearing the memory and/or setting all unused fields to 0. Memory is a funny thing ☺.

- Finally, not sure why you are using -1’s instead of the proper kColorConvObj_AnyObject, etc. Use the constants, they are there for a reason

C
chongl43868165Autor
Inspiring
August 15, 2017

I didn't find mSize member in the PDColorConvertActionRec

I've changed like this, but still not:

  1. AVDoc avDoc = AVAppGetActiveDoc();
  2. PDDoc pdDoc = AVDocGetPDDoc(avDoc);
  4. ASBool pageChanged = false;
  5. PDColorConvertParamsRec colorParams = {0};
  6. PDColorConvertActionRec colorConvertAction = {0};
  7. AC_Profile  workingProfile; 
  8. ACGetWorkingSpaceProfile(kACWorkingCMYK, &workingProfile);
  10. colorConvertAction.mMatchAttributesAny = kColorConvObj_AnyObject;
  11. colorConvertAction.mMatchSpaceTypeAny = kColorConvAnySpace;
  12. colorConvertAction.mMatchIntent= AC_UseProfileIntent;
  13. colorConvertAction.mConvertIntent = AC_UseProfileIntent;
  14. colorConvertAction.mConvertProfile= workingProfile;
  15. colorConvertAction.mEmbed = true;
  16. colorConvertAction.mPreserveBlack = true;
  17. colorConvertAction.mUseBlackPointCompensation= true;
  18. colorConvertAction.mAction = kColorConvConvert;
  19. colorConvertAction.mIsProcessColor = false;
  21. colorParams.mActions = &colorConvertAction;
  22. colorParams.mNumActions = 1;
  23. colorParams.mInks = NULL;
  24. colorParams.mNumInks = 0;
  26. PDDocColorConvertPage( pdDoc , &colorParams , 0 , NULL , NULL , 0 , NULL , &pageChanged ); 
lrosenth
Adobe Employee
lrosenth
Adobe Employee
August 15, 2017

Ah, I see now.

I am looking at the Ex versions of these structures and APIs…

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