darling-cocotron/Onyx2D/O2ImageSource.m

/* Copyright (c) 2007 Christopher J. W. Lloyd

Permission is hereby granted, free of charge, to any person obtaining a copy of
this software and associated documentation files (the "Software"), to deal in
the Software without restriction, including without limitation the rights to
use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
the Software, and to permit persons to whom the Software is furnished to do so,
subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */

#import <Foundation/NSData.h>
#import <Onyx2D/O2DataProvider.h>
#import <Onyx2D/O2Exceptions.h>
#import <Onyx2D/O2ImageSource.h>

NSString *kO2ImagePropertyDPIWidth = @"DPIWidth";
NSString *kO2ImagePropertyDPIHeight = @"DPIHeight";
NSString *kO2ImagePropertyPixelHeight = @"PixelHeight";
NSString *kO2ImagePropertyPixelWidth = @"PixelWidth";
NSString *kO2ImagePropertyOrientation = @"Orientation";

NSString *kO2ImagePropertyTIFFDictionary = @"{TIFF}";
NSString *kO2ImagePropertyExifDictionary = @"{Exif}";

NSString *kO2ImagePropertyTIFFXResolution = @"XResolution";
NSString *kO2ImagePropertyTIFFYResolution = @"YResolution";
NSString *kO2ImagePropertyTIFFOrientation = @"Orientation";

@interface _O2ImageSource : O2ImageSource
@end

@implementation O2ImageSource

+ (O2ImageSourceRef) newImageSourceWithDataProvider: (O2DataProvider *) provider
                                            options: (CFDictionaryRef) options
{
    NSString *classes[] = {@"O2ImageSource_PNG",
                           @"O2ImageSource_TIFF",
                           @"O2ImageSource_JPEG",
                           @"O2ImageSource_BMP",
                           @"O2ImageSource_GIF",
                           @"O2ImageSource_ICNS",
                           nil};
    int i;

    for (i = 0; classes[i] != nil; i++) {
        Class cls = NSClassFromString(classes[i]);

        if ([cls isPresentInDataProvider: provider]) {
            [provider rewind];
            return [[cls alloc] initWithDataProvider: provider
                                             options: (NSDictionary *) options];
        }
    }

    return nil;
}

+ (O2ImageSourceRef) newImageSourceWithData: (CFDataRef) data
                                    options: (CFDictionaryRef) options
{
    O2DataProviderRef provider = O2DataProviderCreateWithCFData(data);
    O2ImageSourceRef result = [self newImageSourceWithDataProvider: provider
                                                           options: options];
    O2DataProviderRelease(provider);
    return result;
}

+ (O2ImageSourceRef) newImageSourceWithURL: (NSURL *) url
                                   options: (CFDictionaryRef) options
{
    O2DataProviderRef provider = [[O2DataProvider alloc] initWithURL: url];
    O2ImageSourceRef result = [self newImageSourceWithDataProvider: provider
                                                           options: options];
    O2DataProviderRelease(provider);
    return result;
}

+ (BOOL) isPresentInDataProvider: (O2DataProvider *) provider {
    return NO;
}

- initWithDataProvider: (O2DataProvider *) provider
               options: (NSDictionary *) options
{
    _provider = [provider retain];
    _options = [options retain];
    return self;
}

- (void) dealloc {
    [_provider release];
    [_options release];
    [super dealloc];
}

- (CFStringRef) type {
    O2InvalidAbstractInvocation();
    return nil;
}

- (NSUInteger) count {
    O2InvalidAbstractInvocation();
    return 0;
}

- (CFDictionaryRef) copyPropertiesAtIndex: (NSUInteger) index
                                  options: (CFDictionaryRef) options
{
    return [[NSDictionary alloc] init];
}

- (O2Image *) createImageAtIndex: (NSUInteger) index
                         options: (CFDictionaryRef) options
{
    O2InvalidAbstractInvocation();
    return nil;
}

O2ImageRef O2ImageSourceCreateImageAtIndex(O2ImageSourceRef self, size_t index,
                                           CFDictionaryRef options)
{
    return [(O2ImageSource *) self createImageAtIndex: index options: options];
}

@end