1 bit image appears negative in dark mode

Posted on Fri 24th, June 2022

• #1

blogmywiki

I have a 1 bit image without transparency that appears negative when the watch is in dark mode (BangleJS2).

Is there any way of over-riding this, or should I just use 4-bit mode? (Which would be a shame as I think the string will become longer, and the image just comprises black and white pixels).

Grateful for any advice!

(Reason is building watch face below:)
• #2

PeerDavid

You can fix colors via"g.theme.fg=..." and "g.theme.bg=..." or you can call g.setColor("#fff"); before drawing the image... not sure if there are better options :)
• #3

blogmywiki in reply to @PeerDavid

Thank you - I'll give that a go!
• #4

PeerDavid

Btw the watchface looks really great I will definitely download this one :D
• #5

blogmywiki

Thank you - and thank you for spotting the error in the JSON file. Hope to change the icons as well later tonight or tomorrow.
• #6

Gordon

Yes, the 'issue' is that if you have a 1bpp (or 2) unpaletted image, it's drawn in the current FG and BG colours - it's done so you can easily colour images just by using setColor.

... but it does mean that unless you set the colours first, the current theme gets used.
• #7

blogmywiki in reply to @Gordon

Thanks Gordon - makes sense!

Post a reply
- Bold
- Italics
- Link
- Image
- List
- Quote
- code
- Preview
Formatting Help

Don't worry about formatting, just type in the text and we'll take care of making sense of it. We will auto-convert links, and if you put asterisks around words we will make them bold.

Tips:

Create headers by underlining text with ==== or ----

To *italicise* text put one asterisk each side of the word

To **bold** text put two asterisks each side of the word

Embed images by entering:
![](https://www.google.co.uk/images/srpr/logo4w.png)
That's the hard one: exclamation, square brackets and then the URL to the image in brackets.

* Create lists by starting lines with asterisks

1. Create numbered lists by starting lines with a number and a dot

> Quote text by starting lines with >

Mention another user by @username

For syntax highlighting, surround the code block with three backticks:

```
Your code goes here
```
Just like Github, a blank line must precede a code block.

If you upload more than 5 files we will display all attachments as thumbnails.

For a full reference visit the Markdown syntax.