NSImage PDF -> JPG

unknown
Sage
Posts: 1,403
Joined: 2005.07
Post: #1
Oct 23, 2005 — 10:35 AM
Does anyone know how to convert an NSImage loaded by imageNamed@"somthing.pdf", the type you get with screenshots on .3.9, into a jpeg?
Sir, e^iπ + 1 = 0, hence God exists; reply!
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akb825
Moderator
Posts: 1,140
Joined: 2005.07
Post: #2
Oct 23, 2005 — 11:58 AM
You can open it with NSImage's open image with file init method, then create an NSBitmapImageRep from the TIFFRepresentation of the image. After that, you can get the NSData for various image formats and save them to the disk. (look at the documentation for the exact method names)

Edit: basically exactly what you did with your GlyphTool, but first load the image using NSImage's initWithContentsOfFile method.
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unknown
Sage
Posts: 1,403
Joined: 2005.07
Post: #3
Oct 23, 2005 — 02:51 PM
Oh that works!
Thanks so much I was getting really stressed about not being able to convert pdf's.

Code if anyone wants to convert whatever image type into a jpg
Code:
#import <Cocoa/Cocoa.h>

int main (int argc, const char * argv[]) {
    if(argc != 3)
        return 0;
    
    NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];
    
    NSApplicationLoad();
    
    NSImage *image = [[NSImage alloc] initWithContentsOfFile:[NSString stringWithCString:argv[1]]];
    NSData *tiffRep = [image TIFFRepresentation];
    
    NSBitmapImageRep *rep = [[NSBitmapImageRep alloc] initWithData:tiffRep];
    
    NSData *bitmapData = [rep representationUsingType:NSJPEGFileType properties:NULL];
    [bitmapData writeToFile:[NSString stringWithCString:argv[2]] atomically:YES];
    
    [pool release];
    return 0;
}
Sir, e^iπ + 1 = 0, hence God exists; reply!
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PowerMacX
Moderator
Posts: 766
Joined: 2003.04
Post: #4
Oct 23, 2005 — 08:36 PM
[hint]Bits of code like this would would make an interesting Wiki[/hint]
old site
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