Information

Pixel Count on retina displays

Retina displays’ pixel size is doubled the screen’s resolution.
For example, a resolution of 1440x900 would have 2880x1800 pixels.
This is because there are 2 pixels/unit.
This doesnt affect the library, since screenshots are taken at the resolution’s size.

Mouse and Screen Position

The X and Y coordinates start at the top left of the screen at (0,0). X coordinate increases going to the right, while Y increases going down

0,0       X increases -->
+---------------------------+
|                           | Y increases
|                           |     |
|   1440 x 900 screen       |     |
|                           |     V
|                           |
|                           |
+---------------------------+ 1439, 899

The bottom-right coordinates will be the resolution - 1. This is because the coordinates start at (0,0)