Read (or guess) size of raw RGBA/RGB files

[smiRaphi]

Windows OS version

Windows 11 25H2

ImageGlass version

9.4.1.15

ImageGlass release

Classic

1️⃣ Describe the feature

example file name: 512x512.rgba
This should then be parsed to ImageMagick as an RGBA image with dimensions 512 x 512, little endian & bit depth 8.
example file name 2: chr_e_db41a_body_256x512.rgba4444be
This should be parsed as RGBA 256 x 512 big endian with bit depth 4.

But if a file doesn't have the size in the file name, try guessing it based off of file size & format:
example file: 1mb, RGBA
So to calculate the dimensions:

root(size*8/BitsPerPixel)
root(1048576*8/32 = 262144) = 512

Aliases for formats should also be supported, so:
RGBA == RGBA8 == RGBA8888
RGB == RGB8 == RGB888

As ImageMagick also needs the depth, that can also just be derived from the extension with 8 bits per color being the default (so the aliases above are correct).

2️⃣ How to use feature

Open an .rgba/.rgba8/.rgba8888/.rgb565/.rgb/.rgb8/.rgb888/.rgba4/... file
I would also personally say that extensions with endianess also have to specify the bit depth so .rgb8be and .rgba8888le would be allowed but not .rgble

3️⃣ Additional context

No response