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https://github.com/zhigang1992/shadowsocks-iOS.git
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56 lines
2.0 KiB
Objective-C
56 lines
2.0 KiB
Objective-C
/*
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* Copyright 2012 ZXing authors
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/**
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* Represents a 2D matrix of bits. In function arguments below, and throughout the common
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* module, x is the column position, and y is the row position. The ordering is always x, y.
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* The origin is at the top-left.
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*
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* Internally the bits are represented in a 1-D array of 32-bit ints. However, each row begins
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* with a new NSInteger. This is done intentionally so that we can copy out a row into a BitArray very
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* efficiently.
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*
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* The ordering of bits is row-major. Within each NSInteger, the least significant bits are used first,
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* meaning they represent lower x values. This is compatible with BitArray's implementation.
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*/
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@class ZXBitArray;
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@interface ZXBitMatrix : NSObject
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@property (nonatomic, readonly) int width;
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@property (nonatomic, readonly) int height;
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@property (nonatomic, readonly) int32_t *bits;
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+ (ZXBitMatrix *)bitMatrixWithDimension:(int)dimension;
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+ (ZXBitMatrix *)bitMatrixWithWidth:(int)width height:(int)height;
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- (id)initWithDimension:(int)dimension;
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- (id)initWithWidth:(int)width height:(int)height;
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- (BOOL)getX:(int)x y:(int)y;
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- (void)setX:(int)x y:(int)y;
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- (void)flipX:(int)x y:(int)y;
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- (void)clear;
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- (void)setRegionAtLeft:(int)left top:(int)top width:(int)width height:(int)height;
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- (ZXBitArray *)rowAtY:(int)y row:(ZXBitArray *)row;
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- (void)setRowAtY:(int)y row:(ZXBitArray *)row;
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- (NSArray *)enclosingRectangle;
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- (NSArray *)topLeftOnBit;
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- (NSArray *)bottomRightOnBit;
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@end
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