How to resize an image ? 🤔

[Adam D. Ruppe]

On Friday, 25 December 2020 at 22:59:55 UTC, vnr wrote:
>    tmp.data = cast(ubyte[]) myImageData;

You set bytes here but an IndexedImage also needs a palette which 
you didn't set up.

What format is your myImageData in? It might be more appropriate 
to set it to a TrueColorImage.

IndexedImage: each pixel is one byte and it refers to a Color[] 
palette.

TrueColorImage: each pixel is 4 bytes, red, green, blue, and 
alpha inline.

If your image data isn't already read, you might load it as a 
different thing instead with loadImageFromMemory. It all depends 
what format you are starting with.

>    writeln(guessImageFormatFromMemory(tci.imageData.bytes)); // 
> "Unknown"

That function is also for reading files, not raw bytes like 
inside the classes. The classes are supposed to already be in a 
specific layout.