Re: representationUsingType:NSBMPFileType == nil
Re: representationUsingType:NSBMPFileType == nil
- Subject: Re: representationUsingType:NSBMPFileType == nil
- From: Florent Pillet <email@hidden>
- Date: Thu, 13 Nov 2003 15:32:23 +0100
Just a quick answer publicly for others to find the source code they
need:
I now use the Quicktime graphics importers and exporters to export
various formats
(including Quickdraw GWorlds, BTW).
For those interested, the source code is in the CVS at the
osx-palm-tools project,
here is a link to a CVS file of interest:
http://cvs.sourceforge.net/viewcvs.py/osx-palm-tools/PalmServices/
NSImage-PalmExtensions.m
(don't get fooled by the "PalmExtensions" category, it's just because
the code is part of a broader project which is a UI editor for Palm
development).
Florent.
On 13 nov. 03, at 12:30, Lorenzo wrote:
Hi Florent,
I have the same problem, and even with the Andrew's suggestion, I
cannot
find the APIs to solve the problem by myself. How to copy over just
the RGB
values? Any sample code? This is what I did and it works for all of the
other NSBitmapImageFileType(s) but for the "NSBMPFileType".
id rep = [[[NSBitmapImageRep alloc] initWithData:
[myImage TIFFRepresentation]] autorelease];
id iconFormatRep = [rep representationUsingType:
NSBMPFileType properties:nil];
When I use NSBMPFileType, iconFormatRep is always nil;
Thank you.
Best Regards
--
Lorenzo
email: email@hidden
On Sep 30, 2003, at 6:10 AM, Florent Pillet wrote:
Hmm after checking the archives, it looks like I'm hitting the
"NSBMPFileType doesn't really work" problem. If I get a NSPNGFileType
representation, everything works fine. However, NSBMPFileType always
return nil. Grr.
The BMP creation code is very limited. Make sure the bitmap is 8 bit
RGB or greyscale, no alpha, no extra components, non-planar.
-initWithFocusedViewRect: may return an image with an alpha channel and
if so, the conversion to BMP won't work and you'll get NULL back. If
there is alpha, allocate a new NSBitmapImageRep and copy over just the
RGB values.
Alternatively, the BMP format is quite simple and you could write it
out yourself especially if you use 8 bit samples.
Andrew
_______________________________
Andrew Platzer
Application Frameworks
Apple Computer, Inc.
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--
Florent Pillet, Code Segment email@hidden
Developer tools and end-user products for Palm OS & Mac OS X
ICQ: 117292463
http://perso.wanadoo.fr/fpillet
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