How to get the ICC bytes out of CPDF_ICCBasedCS

[Roman Wueger]

Hello,

how do I get the icc bytes out of CPDF_ICCBasedCS, so I can use it with ImageMagick?

Something like buffer[1024] an iterator + length or similar?

Thanks in advance
Roman

[David Tejnora]

Hello, 

  You have to get stream, load it and get span with data. You have to check all return values.

  

My sample:

   const CPDF_Stream* pStream = mColorSpace->GetArray()->GetStreamAt(1);
   RetainPtr<CPDF_StreamAcc> stream=pdfium::MakeRetain<CPDF_StreamAcc>(pStream);
   stream->LoadAllDataFiltered();
   pdfium::span<const uint8_t> iccProfile=stream->GetSpan();

David

st 7. 4. 2021 v 11:13 odesílatel Roman Wueger <roman....@gmail.com> napsal:

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[Roman Wueger]

Hello David,

thank you I will try your suggestion.

Best Regards

Roman

Am 07.04.2021 um 17:33 schrieb David Tejnora <david....@gmail.com>:



[roman....@gmail.com]

Hi David,

 

Thanks and sorry for the long response, but I don’t get the ICC data out of it.

 

Here is how I get the colorspace:

FPDF_IMAGEOBJ_METADATA metadata;

auto ret = FPDFImageObj_GetImageMetadata(pageObject, page.get(), &metadata);

if (ret) {

//auto iccProfile = static_cast<CPDF_ICCBasedCS *>(metadata.colorspace); // HERE I WANT TO GET THE ICC DATA

//if (iccProfile) {

//    if (StringInfo *stringInfo = BlobToStringInfo(iccProfile->->GetStream()->, iccProfile.size)) {

//        SetImageProfile(pImage, "icc", stringInfo, exception.get());

//    }

//}

}

 

Best Regards

Roman

[David Tejnora]

Hello,

I expected that "pageObject" is CPDF_PageObject. You have to get colorspace from this object:

const CPDF_ColorState* colorState=aPageObject->m_ColorState;

Now select fill or stroke.

const CPDF_Color* fillColor=colorState->GetFillColor();

Select the colorspace, but m_pCS is protected and I can not find getter. Probably you have to add getter, or make it public (comment protected).

const CPDF_ColorSpace* fillColorSpace=fillColor ->m_pCS.Get();

And use it:

auto iccProfile = static_cast<CPDF_ICCBasedCS *>( fillColorSpace  );

...

David

čt 10. 6. 2021 v 13:32 odesílatel <roman....@gmail.com> napsal: