devongovett / bmp.js Goto Github PK

I'm looking to support a broader range of bmp types. I made my own test images using gimp, plus tried the test set from http://entropymine.com/jason/bmpsuite/ .

Chrome can natively read:
16 bit X1 R5 G5 B5 gimp bmp
24 bit gimp bmp
32 bit A8 R8 G8 B8 gimp bmp

It cannot handle:
16 bit R5 G6 B5 gimp bmp
16 bit A1 R5 G5 B5 gimp bmp
32 bit X8 R8 G8 B8

So I was hoping this could expand that support. :D In testing, your test.bmp works fine. However, of my 6 test images, only one displays nearly correctly - the 24 bit gimp bmp. The others all show serious distortion, as well as a loss of the color info. The 24-bit is fine, save for a 1px black line across the top. It is not visible in the canvas, but when you write the canvas out to jpg with toDataURL("image/jpeg"), the line shows up. It does not show up when using the native Chrome support for a 24-bit bmp.

As for the test suite from http://entropymine.com/jason/bmpsuite/ , none of those images show up correctly.