Problem with a PDF file and DrawImage

Hi,

I see in your second PDF near to lower left corner a small image.

But without seeing your code snippet nobody may help you.

Inside the refertoout.pdf I see no trace of drawing with QuickPDF.


Cheers,

Werner

Hi tropenix,

it is rather clear. You use QP.ImageWidth and QP.ImageHeight without thinking about the measurementunits. Both functions will give pixels. But inside your PDF you work with millimeters or points (default).

QP.DrawImage 100 , 100 , lWidth , lHeight

uses the pixelvalues (I guess 48x50 px) as point. A point is here defined as inch/72. An inch is 25.4 mm, so 48 points are 16.9 mm. If I see your refertoout.pdf in Adobe Reader, the image has big white borders, so it looks smaller, as it is. Not good for tests. And its posisition is not 100,100 from SetOrigin(1), which means topleft. It is so, because SetOrigin has to be used after Loadfromfile, origin is set for a document and not over boundaries for all of them.

What is to do? It depends only what you want. It's now your job, to calculate from pixelvalues to the wished scaling of images. Look to SetMeasurementUnits-function.

I wrote: Inside the refertoout.pdf I see no trace of drawing with QuickPDF.

I do not see too the text "PROVA DI INSERIMENTO TESTO" in . Because there SetOrigin is on right place, use a bigger y-value. The referencepoint is on baseline, not on top of text.


Cheers,

Werner

Hi,

I did a look inside of refertoout.pdf. There are the internals generated from Drawtext and Drawimage.

BT
1 0 0 1 100 831 Tm
(PROVA DI INSERIMENTO TESTO)Tj
ET
 q
121.92 0 0 127 254 460 cm
/QuickPDFIm79863349 Do
Q

The text should be drawn sharp on the upper border which is at 841 points. So his height has to be not more than 10 points. Ok. But it is other.

As I zoom with Adobe Reader to 1600% I see your text and image down in lower left corner. So I got another idea about the error-source. Its not in your code, but in the PDF, you want to modify. To proof this, take another input-PDF (made not with the program wich produces referto.pdf). And it explains that you have the problem by random.

I had such effects with same PDFs, whith incorect commands inside. To be more sure against this, set all normally defaults directly before doing your output. This is as first font and its size and measureunits.

You have rather the same situation as a subroutine would use unallowed global values and after its call all goes wrong. Here is the programmer of the PDF-source the bad gay.

 
Cheers
Werner
 

Hi,