I haven’t written any code yet, but I’ve encountered a similar problem before. Hopefully

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Asked: May 10, 20262026-05-10T17:21:59+00:00 2026-05-10T17:21:59+00:00

I haven’t written any code yet, but I’ve encountered a similar problem before. Hopefully things have changed since the last time I visited it.

I’m trying to do my own image conversion for games into a special OpenGL image format.

In order to perform the conversion correctly, I need all pixel data and more importantly, i need all the alpha channel data (all 8bits per pixel).

Does the System.Drawing.dll in .NET support full 32-bit alpha transperency loading?

Will I be able to walk the alpha channel with all information retained in C#?

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score 0 · Answer 1 · 2026-05-10T17:21:59+00:00

System.Drawing supports any image formate GDI+ does (PNG-32 included), and getting that information is possible.

Look in to System.Drawing.Bitmap.GetPixel or LockBits

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