"
> 2008/2/20, Leonard Rosenthol <[EMAIL PROTECTED]>:
>>> Hmm, doesn't help :-( I tried every blend mode, but this doesn't
>>> prevent Acrobat from switching to the CMYK color space.
>>>
>>
>> You need to set the COLORSPACE to DeviceRGB...
>
> Thanks, but how can I achieve it? I tried
>
> 1.
> ImgTemplate image2 = new ImgTemplate(template);
> PdfArray colorspace = new PdfArray();
> colorspace.add(PdfName.DEVICERGB);
> PdfDictionary ad = new PdfDictionary();
> ad.put(PdfName.COLORSPACE, colorspace);
> image2.setAdditional(ad);
>
> 2.
> PdfDictionary ad = new PdfDictionary();
> ad.put(PdfName.COLORSPACE, PdfName.DEVICERGB);
> image2.setAdditional(ad);
Stephan,
We struggled with this problem for a long time too. Our situation was
slightly different than yours in that we make heavy use of transparency
with vector graphics as opposed to transparent images.
The only way I could keep acrobat reader from changing the color space to CMYK
was to set the entire page containing our graphics to a transparency group and
then set the colorspace accordingly. See the VB code snippet below.
Dim pp As PdfDictionary = New PdfDictionary
pp.Put(PdfName.TYPE, PdfName.GROUP)
pp.Put(PdfName.S, PdfName.TRANSPARENCY)
pp.Put(PdfName.CS, PdfName.DEVICERGB)
doc.Open()
Dim cb As PdfContentByte = writer.DirectContent
Dim tp As PdfTemplate = cb.CreateTemplate(x, y)
'Include the below immediately after a doc.NewPage() or after creating
a new doc as above
cb.PdfWriter.Group = pp
cb.SetDefaultColorspace(PdfName.CS, PdfName.DEVICERGB)
tp.SetDefaultColorspace(PdfName.CS, PdfName.DEVICERGB) 'Not sure if
this one is necessary
Anyway, this works for us. Maybe it will be of some help to you as well.
Cheers,
Eliot Cline-------------------------------------------------------------------------
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