wxBitmap used as an icon, any way to change the colours? This is to convert the colours for dark mode.

[Tony Kennedy]

Hello all,

My app works well in dark mode by taking a colour, converting to HSL, modifying the luminescence and converting back to RGB. I'd like to do the same with the icons if I can.

I've tried using the wxBitmap::GetPalette, but I always get a NULL returned. I've experimented with other things, but failed all the time.

Does anyone know a way of doing this? Most of my icons have less than 5 colours, I was hoping I could get a list of them, modify them and apply them to the original bitmap.

Thanks in advance,

Tony.

[Vadim Zeitlin]

On Sun, 5 Sep 2021 23:48:43 -0700 (PDT) Tony Kennedy wrote:

TK> Hello all,
TK>
TK> My app works well in dark mode by taking a colour, converting to HSL,
TK> modifying the luminescence and converting back to RGB. I'd like to do the
TK> same with the icons if I can.
TK>
TK> I've tried using the wxBitmap::GetPalette, but I always get a NULL
TK> returned. I've experimented with other things, but failed all the time.

Palettes are not really used since a couple of decades already, so this is
not going to work.

TK> Does anyone know a way of doing this? Most of my icons have less than 5
TK> colours, I was hoping I could get a list of them, modify them and apply
TK> them to the original bitmap.

Icons are typically not that big, so you could just convert wxBitmap to
wxImage, transform each pixel individually and then convert it back.

Regards,
VZ

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[Tony Kennedy]

Thanks for the suggestion. It works well, sadly the icons still do not look great in dark mode so it looks like they will need to be updated manually.

Tony.