Trying to encode 16 bit RGB PNG but result is 8 bit

[dk-teknologisk-mlnn]

Hi,

I cannot get it to work with saving a 16 bit RGB image. I end up with 8 bit RGB. Upon decoding the file again it gives me state.raw_info.bitdepth == 8 .
I tried with : lodepng::encode(pstr, VImage, m_x, m_y, LCT_RGB, 16U);
and also using state:
lodepng::State state;
state.info_raw.bitdepth = 16U;
state.info_raw.colortype = LCT_RGB;
state.encoder.auto_convert = 1;
state.info_png.color.bitdepth = 16;
state.info_png.color.colortype = LCT_RGB;

			std::vector<unsigned char> png;
			
			unsigned error = lodepng::encode(png, Vimage, m_x, m_y, state);
		
			if (!error) lodepng::save_file(png, pstr);

[dk-teknologisk-mlnn]

it is working now with "state". It was "autoconvert" that switched it back to 8bit.

[lvandeve]

Indeed, by default it converts to the smallest color model possible, but this can be disabled with the state, thank you for figuring it out :)