PureBasic Forums - English

Posted: **Mon Jul 11, 2016 9:07 pm**

Greetings to all,

perhaps I'm tired and overlooking something, but I have a big problem at the moment - if I output a vector drawing to printer via StartVectorDrawing(PrinterVectorOutput()), it seems to be DPI dependent - IOW, if I set my printer to 1200 DPI (ie.), it will print to scale, but if i set it to 600 or 2400 DPI it will print two times smaller and two times bigger respectively.

What is the most convenient way to "fix" such outputs regardless of DPI settings in printer? Crossplatform?

Additionally, how can I define size of the PrinterVectorOutput() "canvas" (page size?)?

With my very best,

Bruno

Posted: **Mon Jul 11, 2016 11:03 pm**

@bbanelli,

I can confirm that. I've been searching for a solution.

Thanks for bringing the matter up.

Posted: **Mon Jul 11, 2016 11:24 pm**

Although it's hellishly hot in my part of Europe and I'm dead tired, I might be on to something.

I have calculated RatioX and RatioY by dividing actual VectorResolutionX/Y() with 1200. I'm not really sure how to get "1200" value (or perhaps that's a default one?) but it seems to be working for me at the moment for all resolutions of printer from 144 to 4000 DPI, triend on Acrobat Distiller, Lexmark T654, HP LaserJet 400 and Ricoh SP C240 with resolutions as available - all scaling properly.

Code looks something like this:

Code: Select all

RatioX = VectorResolutionX()/1200
RatioY = VectorResolutionY()/1200
ScaleCoordinates(RatioX, RatioY)
MovePathCursor(X/RatioX, Y/RatioX)

Perhaps there's a better way?

PureBasic Forums - English

DPI "agnostic" VectorDrawing() output - fixing printout size

DPI "agnostic" VectorDrawing() output - fixing printout size

Re: DPI "agnostic" VectorDrawing() output - fixing printout

Re: DPI "agnostic" VectorDrawing() output - fixing printout