/*
 * Copyright 2012 ZXing authors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

/**
 * This class attempts to find finder patterns in a QR Code. Finder patterns are the square
 * markers at three corners of a QR Code.
 * 
 * This class is thread-safe but not reentrant. Each thread must allocate its own object.
 */

extern int const FINDER_PATTERN_MIN_SKIP;
extern int const FINDER_PATTERN_MAX_MODULES;

@class ZXBitMatrix, ZXDecodeHints, ZXFinderPatternInfo;
@protocol ZXResultPointCallback;

@interface ZXFinderPatternFinder : NSObject

@property (nonatomic, retain, readonly) ZXBitMatrix *image;
@property (nonatomic, retain, readonly) NSMutableArray *possibleCenters;

- (id)initWithImage:(ZXBitMatrix *)image;
- (id)initWithImage:(ZXBitMatrix *)image resultPointCallback:(id <ZXResultPointCallback>)resultPointCallback;
- (ZXFinderPatternInfo *)find:(ZXDecodeHints *)hints error:(NSError **)error;
+ (BOOL)foundPatternCross:(int[])stateCount;
- (BOOL)handlePossibleCenter:(int[])stateCount i:(int)i j:(int)j;

@end