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GetContentStreamToVariant - strange
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mLipok View Drop Down
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Points: 449 		Post Options Post Options   Thanks (0) Thanks(0)   Quote mLipok Quote  Post ReplyReply Direct Link To This Post Topic: GetContentStreamToVariant - strange
    Posted: 17 May 14 at 10:29AM
I have a document from the bank - the confirmation of the order.
When I retrieves text using ExtractFilePageText, I receive 1701 bytes of text.
But when I use:
BinaryToString ($oQP.GetContentStreamToVariant())
I receive only a short piece:

0x710A3130203020302031302030202D312E3532373620636D0A302E312030203020302E312030203020636D0A2F517569636B504446584F663538326338643320446F0A510A

Below string represtnation of this binary data:

q
10 0 0 10 0 -1.5276 cm
0.1 0 0 0.1 0 0 cm
/QuickPDFXOf582c8d3 Do
Q


Remarks:
When I use ContentStreamCount then I get in results = 1

QUESTIONS:
What am I doing wrong? 
Why function: GetContentStreamToVariant is not getting all the PDF content?
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Ingo View Drop Down
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Points: 3524 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Ingo Quote  Post ReplyReply Direct Link To This Post Posted: 17 May 14 at 11:30AM
Hi,

you have to select the relevant content stream you wanna have first:

Cheers, Ingo
Cheers,
Ingo
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mLipok View Drop Down
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Points: 449 		Post Options Post Options   Thanks (0) Thanks(0)   Quote mLipok Quote  Post ReplyReply Direct Link To This Post Posted: 17 May 14 at 11:53AM
If I understand you that you mean something like this:

$oQP.LoadFromFile($sFileName, '')
Local $sOutput
For $i = 1 to $oQP.ContentStreamCount()
$oQP.SelectContentStream($i)
$sOutput &= BinaryToString($oQP.GetContentStreamToVariant()) & @CRLF
Next
ClipPut($sOutput)


result:
q
10 0 0 10 0 -1.5276 cm
0.1 0 0 0.1 0 0 cm
/QuickPDFXOf582c8d3 Do
Q


Do I understand it? 
Or still I doing something wrong? 
This single PDF file I can send to email (contains only one page of my private data)
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Ingo View Drop Down
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Points: 3524 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Ingo Quote  Post ReplyReply Direct Link To This Post Posted: 17 May 14 at 7:56PM
What about reading the description about SelectContentStream first?
There you can read "...This function selects one of the selected page's content stream parts....".
The selected pages... you've selected no page i think.
And i don#t know the dev-language you're using but i fear in Output will always be only the very last content.

Cheers, Ingo
Cheers,
Ingo
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mLipok View Drop Down
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Points: 449 		Post Options Post Options   Thanks (0) Thanks(0)   Quote mLipok Quote  Post ReplyReply Direct Link To This Post Posted: 17 May 14 at 9:52PM
it is:
Concatenation assignment

http://www.autoitscript.com/autoit3/docs/intro/lang_operators.htm

"
&=
 Concatenation assignment. e.g. $vVar = "one", and then $vVar &= 10    ($vVar now equals "one10")
"

So how yous see it: adds a new string without deleting the previous content

But now I still think the problem is here: 
"
When I use $oQP.ContentStreamCount() then I get in results = 1
"

So there is only one Stream on this Page.
And this file had only one Page.
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AndrewC View Drop Down
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Points: 841 		Post Options Post Options   Thanks (0) Thanks(0)   Quote AndrewC Quote  Post ReplyReply Direct Link To This Post Posted: 18 May 14 at 9:25AM
mLipok,

That is a perfectly valid conten stream.

The PDF content is contained in an XObject.  CapturePage and DrawCapturedPage make use of XObjects.  XObects are like macros and can be nested, rotated and scaled before being drawn.
This is all documented in the PDF Specifications.

Also you can call QP.CombineContentStreams to multiple content streams into a single contentstream.  This will not help you in this case though.


Andrew.
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mLipok View Drop Down
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Points: 449 		Post Options Post Options   Thanks (0) Thanks(0)   Quote mLipok Quote  Post ReplyReply Direct Link To This Post Posted: 18 May 14 at 1:49PM
It is puzzling why ExtractFilePageText() function gets the full content on this page?
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AndrewC View Drop Down
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Points: 841 		Post Options Post Options   Thanks (0) Thanks(0)   Quote AndrewC Quote  Post ReplyReply Direct Link To This Post Posted: 19 May 14 at 1:16PM
mLipok,

It is because the text extraction routines recursively parses the XObjects and takes care of all the scaling and translation that may occur.  Proper text extraction is a complex process.  Our text extraction is actually using the page rendering code to extract the text.  There is no simple way to extract text for all PDF files.  There are many different ways to draw text in a PDF. 

Andrew.
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mLipok View Drop Down
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Points: 449 		Post Options Post Options   Thanks (0) Thanks(0)   Quote mLipok Quote  Post ReplyReply Direct Link To This Post Posted: 19 May 14 at 10:11PM
Thanks for the clarification. 
I still have one concept. 
I have to first do the tests. 
Then if this will have any useful information. then I will share them.
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