The bitmap drawing is not compatible with the img2cpp websites. The data needs to be fliped every 8bits.

[sonictl]

Describe the bug

I'm using https://javl.github.io/image2cpp/ for converting the images into xbm data.
However the data generated cannot be displayed correctly. xbm image is flipped every 8 bit.

ESP8266
0.91 inch 128x32 ssd1306 oled.

This incompatible issue can be rebuilt on web tools:
http://dot2pic.com/
https://diyusthad.com/image2cpp
https://javl.github.io/image2cpp/

They are the most easy to use web tools for xbm binary data generation that I can find.

[khairullaizatt]

ive been struggling with the result which is display not compatible. does flipped every 8 bit. can someone show me the right method ?

[leonardojc]

you must use GIMP to export the images in 1-bit XBM format.
Works perfectly

[eitherway]

@sonictl
You don't need to use Gimp. The website (https://javl.github.io/image2cpp/) works fine, if you adjust the output settings:

• No Image Rotation
• Draw Mode: Horizontal (1bit)
• Swap bits in byte: swap <-- This is the important setting.

Thanks for the issue! Without your information, I wouldn't have figured that out.

[marcelstoer]

@eitherway thanks for the comment. Would you be willing to help support this project by creating a PR which extends the documentation in the README?

[eitherway]

@marcelstoer I opened a pull request