Re: NSImage initWithData: and jpegs

[Adam Fedor]

On Wednesday, October 8, 2003, at 07:13 AM, Björn Giesler wrote:

> Hi,
>
> another one... I haven't quite grokked the backend/frontend weaving of 
> images, so maybe someone who knows better can tell me this: Why, if I 
> have a jpeg file called "pic.jpg", does
>         [[NSImage alloc] initWithContentsOfFile: @"pic.jpg"]
> return a valid NSImage, but
> 	[[NSImage alloc] initWithData: [NSData dataWithContentsOfFile: 
> @"pic.jpg"]]
> return nil? Is this some problem with JPEG magic numbers?

Image reading is really hacked together (I can say that because I did 
it :-) ), currently it uses functions from wrlib (WIndowMaker) to read 
jpg, pnm files, etc which only take filenames as input. Really 
NSBitmapImageRep should be re-written to use libjpg, etc directly to 
read images from anywhere.