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// AFImageRequestOperation.m
//
// Copyright (c) 2011 Gowalla (http://gowalla.com/)
//
// 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 "AFImageRequestOperation.h"
#import "AFImageCache.h"
static dispatch_queue_t af_image_request_operation_processing_queue;
static dispatch_queue_t image_request_operation_processing_queue() {
if (af_image_request_operation_processing_queue == NULL) {
af_image_request_operation_processing_queue = dispatch_queue_create("com.alamofire.image-request.processing", 0);
}
return af_image_request_operation_processing_queue;
}
@implementation AFImageRequestOperation
+ (AFImageRequestOperation *)operationWithRequest:(NSURLRequest *)urlRequest
success:(void (^)(UIImage *image))success
{
return [self operationWithRequest:urlRequest imageProcessingBlock:nil cacheName:nil success:^(NSURLRequest *request, NSHTTPURLResponse *response, UIImage *image) {
if (success) {
success(image);
}
} failure:nil];
}
+ (AFImageRequestOperation *)operationWithRequest:(NSURLRequest *)urlRequest
imageProcessingBlock:(UIImage *(^)(UIImage *))imageProcessingBlock
cacheName:(NSString *)cacheNameOrNil
success:(void (^)(NSURLRequest *request, NSHTTPURLResponse *response, UIImage *image))success
failure:(void (^)(NSURLRequest *request, NSHTTPURLResponse *response, NSError *error))failure
{
return (AFImageRequestOperation *)[self operationWithRequest:urlRequest completion:^(NSURLRequest *request, NSHTTPURLResponse *response, NSData *data, NSError *error) {
dispatch_async(image_request_operation_processing_queue(), ^(void) {
if (error) {
if (failure) {
dispatch_async(dispatch_get_main_queue(), ^(void) {
failure(request, response, error);
});
}
} else {
UIImage *image = nil;
if ([[UIScreen mainScreen] scale] == 2.0) {
CGImageRef imageRef = [[UIImage imageWithData:data] CGImage];
image = [UIImage imageWithCGImage:imageRef scale:2.0 orientation:UIImageOrientationUp];
} else {
image = [UIImage imageWithData:data];
}
if (imageProcessingBlock) {
image = imageProcessingBlock(image);
}
dispatch_async(dispatch_get_main_queue(), ^(void) {
if (success) {
success(request, response, image);
}
});
if ([request cachePolicy] != NSURLCacheStorageNotAllowed) {
[[AFImageCache sharedImageCache] cacheImage:image forURL:[request URL] cacheName:cacheNameOrNil];
}
}
});
}];
}
@end
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