[reportlab-users] PDF Document Resolution

Robin Becker robin at reportlab.com
Tue Mar 5 06:08:48 EST 2013

On 02/03/2013 22:15, Andy Robinson wrote:

> PDF is a vector graphics format. It has 'infinite resolution'. If

this is true in some abstract sense, but in fact PDF did everything in fixed
point coordinates (or at least it used to) with 16.16 binary numbers.

Acrobat 6 and later use IEEE floats for all numbers which is a variable
precision format; for numbers near 1 the precision is around 1e-8, obviously for
numbers around 1e38 it will obviously be a bit larger.

Even so as Andy often tells me the smallest thing that can be drawn in PDF are
lines of thickness 0, but the actual width will be printer dependent.
Robin Becker

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