Add support for BGR/RGB

[pablodgonzalez]

both formats are valids and many software open those formats correctly

[LinusU]

Just tried this library and are getting some strange colors, could this be the cause?

This is the file:
905.bmp.zip

This is how preview on macOS renders it:

[pablodgonzalez]

Yes! it is.
I've have not time to research. I don't know if it is BGR/RGB or if it is BMP 32bits without alpha. I've hope somebody know about it.

[LinusU]

Hehe, actually, it turns out that the image is just a common normal bmp. The problem is that I tried to use the output as an ImageData, which expects the data to be RGBA, but bmp-js outputs it as BGRA.

I was looking thru the file with a hex-editor and couldn't for the life of me figure out where it would be specified that it would have a non-standard color order 😂

[mooyoul]

#19 provides solution of this ;)

also, i have forked version of bmp-js to prevent incorrect color issues.
See: #19 (comment)