What are the hard bounds for drawing coordinates in GDI+?

Question

I am rendering an interpolation curve thusly:

e.Graphics.DrawLines(new Pen(Color.Red), _interpolationPoints.ToArray());

which sometimes thr

Answer 1

FYI - I ran into this situation with a simple implementation of a 2D plot. When I zoomed in too far on the image the corresponding pixel locations were WAY off the display area and caused Graphics.DrawLine to throw an OverflowException. So naturally I added a check to ensure that the values where within the limits defined by Paul above. Interestingly though when the Y value got too large (but less than suggested positive value of 1,073,741,951) the resulting line went from being drawn down as expected (to a Y pixel location greater than my last reasonable point) to being drawn up (to the top of the window).

After further investigation I discovered that a value of 8,388,607 (0x7FFFFF) draws the line correctly and a value of 8,388,608 (0x800000) inverts the line.

Looks like signed 24-bit values are used here.