rm-hull/luma.led_matrix

retrieve number of pixels of string to be displayed

Closed this issue · 2 comments

3zra commented

Hello,

To foresee whether a string to be displayed fits into a cascaded 8x8 matrix display of given length and height it would be very helpfull to have means of retrieving the number of pixels needed to display a given string. Is there a way to do this?

Supplement:

RPi Model:
RPi2B

Kernel version:

osmc@osmc:~$ uname -a
Linux osmc 4.9.29-9-osmc #1 SMP PREEMPT Sat Jul 29 01:44:42 UTC 2017 armv7l GNU/Linux
rm-hull commented

If you use the non-legacy text drawing methods then you can use the textsize method on pillow's ImageDraw object. Here's an example of where we used it in the demos: https://github.com/rm-hull/luma.examples/blob/master/examples/game_of_life.py#L64

If you are using the legecy text drawing mechanisms, then there is a shadow function (also called textsize) - see http://luma-core.readthedocs.io/en/latest/api-documentation.html#luma.core.legacy.textsize

3zra commented

@rm-hull Thanks a lot. Your suggestion worked out nicely.

  • 👍1