Touch input is mirrored on the display in touch_demo.py

[CsErik2001]

Description

When touching the screen, the circles are drawn at the opposite location of the touch input. For example, if I touch the top-left corner, the circle appears in the bottom-right corner. It seems like the x and y coordinates are being mirrored.

Steps to reproduce

1. Run the provided demo code on an ESP32 with a CYD touchscreen.
2. Touch anywhere on the display.
3. Observe that the circle is drawn in the opposite location from where you touched.

Expected behavior

The circle should appear where the screen is touched, without mirroring the coordinates.

Code causing the issue

The following lines seem to be the cause of the mirroring:

y = (cyd.display.height - 1) - y
x = (cyd.display.width - 1) - x

Suggested fix:

Remove the mirroring and only ensure the circles are drawn within the screen boundaries:

y = min(max(y, r+1), cyd.display.height - r - 1)
x = min(max(x, r+1), cyd.display.width - r - 1)

[jtobinart]

I'm sorry for not getting back to you sooner. Unfortunately, not all CYDs are created the same and it has plagued MicroPython and CircuitPython implementations. Some require image orientation to be rotated or mirrored. I'll include input mirroring into my upcoming revision. Thanks for letting me know about the issue.