Re: TiffRep from NSImage problem

[Adam Fedor]

On Thursday, August 28, 2003, at 10:56 AM, Iikka Virkkunen wrote:

> Dear list,
>
> I wrote a small command line tool in Cocoa, which prepares my photos 
> for web. I tried to port it to GNUStep, but run into trouble. The 
> stripped down logic goes like this:
>
> int main (int argc, const char * argv[]) {
>   for (...) // for all input images
>   {
>         NSImage *retimg = ... //Create an empty NSImage
>         NSImage *dimg = ... //Create an NSImage from the input file
> 	[retimg lockFocus]; // lock focus to retimg and draw the final image 
> to it
>                 // draw background, scaled dimg and
>                 // nice corners with NSBezierPath
>         [retimg unlockFocus];
>         [[retimg TIFFRepresentation] writeToFile:outfilename atomically:NO];
>    {
> }
> ... but [retimb TIFFRepresentation] fails silently and returns nil.
It currently doesn't handle converting different types of images (like 
NSCachedImageRep) to NSBitmapImageRep. Unfortunately, it returns nil 
instead of telling you that.


> So, I tried a workaround:
>
>             [retimg lockFocus];
> 	    NSBitmapImageRep *tmpbmp = [[NSBitmapImageRep alloc] 
> initWithFocusedViewRect: NSMakeRect(0,0,w,h)];
>             [retimg unlockFocus];
> 	    [[tmpbmp TIFFRepresentation] writeToFile:outfilename 
> atomically:NO];
>
> ... and got a critical error: initWithFocusedViewRect is not 
> implemented.
>
> So, what could be the reason my call to TIFFRepresentation fails?
> How should I do this, then?

There doesn't appear to be a work around for this currently. Sorry. 
File a bug report and hopefully someone will fix it...