ImageMagick version

7.1.1-47

Operating system

Windows

Operating system, version and so on

Windows 11

Description

ImageMagick does not yet support a completely valid variant of DDS (albeit extremely rarely used) where the data is exclusively 8 bits large composed only of Alpha pixels and presumes every other byte is irrelevant and free to be set to anything the user desires (usually at the program level) as such it is ok to have it default to 0xff or 0x00 for simplicity sake for each pixel or maybe have a argument to override it if it does not exist already.

As I said prior: it is extremely rare but does have a place for rare uses such as: old raster fonts.

I do wish to bring to attention that DDS by default supports literally any combination of pixel layouts: RGBA, A, RA, GA, ARGB, BRG, etc. this is on purpose albeit rarely if ever used due to it being unusual, but allows optimizations such as this ALPHA only format.

Example file

Font.zip

Steps to Reproduce

Try to convert/read a valid alpha only DDS file.

Images

Expected output