Improve text visibility

[fabocode]

Issue

I started to work with this module and wanted to test graphics in the NHD-2.7-12864WDW3-M it's a 128x64 display and I did the following code to setup custom fonts and I found it here #247.

from PIL import ImageFont
FontTemp = ImageFont.truetype("./TestFont.otf",16)
draw.text((0, 0), "Example Text", font=FontTemp)

Type of Raspberry Pi

Raspberry Pi 4

Linux Kernel version

Linux raspberrypi 5.4.51-v7l+ #1327 SMP Thu Jul 23 11:04:39 BST 2020 armv7l GNU/Linux

Expected behaviour

A better visibility and smooth letter writing in the display

Actual behaviour

The problem is that the expected font's visibility is not the best and I want to know how I could improve this without having to use the legacy text used in the module like LCD_FONT, SINCLAIR_FONT. In smaller displays like the adafruit SSD1306 works great but this one since use the same resolution I think is when the problem starts to grow.... Do you have any idea about how to improve the text visibility?

I tested all the fonts included in the luma.examples repository but none of them improves the results.

[rm-hull]

You dont say which driver class you are using ... lets presume ssd1325 as I suspect that your device is a greyscale display based on the image, and so Pillow is trying to anti-alias when drawing the font. You can force it to be monochrome (mode=1 rather than RGB) when you initialize the class, e.g. something like:

device = ssd1325(serial_interface=spi, mode="1")

Issue #280 may also give you some background context.

[fabocode]

Hi and sorry about that!, You're right. I'm actually using the ssd1322_nhd driver.

Thanks to your suggestion, I did have an improvement.

self.device = ssd1322_nhd(self.serial, mode="1", width=128, height=64)

[rm-hull]

Glad you got it working! 👍