Getting a 1bpp bmp from Image<TPixel> (essentially monochrome bmp)

[kevinstampe]

Hi there, fellow JimBobSquarePants fans! (and ofc James himself👍)

I can't seem to figure out how to get a monochrome bitmap out of ImageSharp.
I need to render a bitmap for a monochrome display on an IoT device, with a mobile data cap (5MB per month) and would need to update it several times a day.

A 8bpp bitmap is 32KB (the lowest BmpEncoder can be configured with OOTB), while a 1bpp bitmap is 4KB.

Really hope that this is something that can be done :)

Best regards, Kevin

[brianpopow]

The bitmap encoder indeed does only support 8 bit per pixel at the moment. We will need to change the encoder to support 4 bit and 1 bit encoding.

[JimBobSquarePants]

@kevinstampe

You managed to nerdsnipe @brianpopow and he rocked out the support over the last two days!!

You can now pull this build from our MyGet feed which gives you full support. 😄

https://www.myget.org/feed/sixlabors/package/nuget/SixLabors.ImageSharp/1.0.4-alpha.0.15

[kevinstampe]

@brianpopow you've earned yourself a new fan!!!

[kevinstampe]

Makes me sad :(
Anyway to pull pixel data out of the image?
I could just avoid using the save command, if i could byte % 255

[brianpopow]

To get the pixel data you can use Image.Load<L8>, which will load the pixels as L8 which is one byte per pixel (This is the smallest pixel type we have currently). Then you could use either GetPixelRowSpan or TryGetSinglePixelSpan<L8> and create a bit array manually from that.