154 lines
4.5 KiB
Objective-C
154 lines
4.5 KiB
Objective-C
/*
|
|
* 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.
|
|
*/
|
|
|
|
@class ZXBitArray, ZXIntArray;
|
|
|
|
/**
|
|
* Represents a 2D matrix of bits. In function arguments below, and throughout the common
|
|
* module, x is the column position, and y is the row position. The ordering is always x, y.
|
|
* The origin is at the top-left.
|
|
*
|
|
* Internally the bits are represented in a 1-D array of 32-bit ints. However, each row begins
|
|
* with a new NSInteger. This is done intentionally so that we can copy out a row into a BitArray very
|
|
* efficiently.
|
|
*
|
|
* The ordering of bits is row-major. Within each NSInteger, the least significant bits are used first,
|
|
* meaning they represent lower x values. This is compatible with BitArray's implementation.
|
|
*/
|
|
@interface ZXBitMatrix : NSObject <NSCopying>
|
|
|
|
/**
|
|
* @return The width of the matrix
|
|
*/
|
|
@property (nonatomic, assign, readonly) int width;
|
|
|
|
/**
|
|
* @return The height of the matrix
|
|
*/
|
|
@property (nonatomic, assign, readonly) int height;
|
|
|
|
@property (nonatomic, assign, readonly) int32_t *bits;
|
|
|
|
/**
|
|
* @return The row size of the matrix
|
|
*/
|
|
@property (nonatomic, assign, readonly) int rowSize;
|
|
|
|
// A helper to construct a square matrix.
|
|
- (id)initWithDimension:(int)dimension;
|
|
- (id)initWithWidth:(int)width height:(int)height;
|
|
|
|
+ (ZXBitMatrix *)parse:(NSString *)stringRepresentation
|
|
setString:(NSString *)setString
|
|
unsetString:(NSString *)unsetString;
|
|
|
|
/**
|
|
* Gets the requested bit, where true means black.
|
|
*
|
|
* @param x The horizontal component (i.e. which column)
|
|
* @param y The vertical component (i.e. which row)
|
|
* @return value of given bit in matrix
|
|
*/
|
|
- (BOOL)getX:(int)x y:(int)y;
|
|
|
|
/**
|
|
* Sets the given bit to true.
|
|
*
|
|
* @param x The horizontal component (i.e. which column)
|
|
* @param y The vertical component (i.e. which row)
|
|
*/
|
|
- (void)setX:(int)x y:(int)y;
|
|
|
|
- (void)unsetX:(int)x y:(int)y;
|
|
|
|
/**
|
|
* Flips the given bit.
|
|
*
|
|
* @param x The horizontal component (i.e. which column)
|
|
* @param y The vertical component (i.e. which row)
|
|
*/
|
|
- (void)flipX:(int)x y:(int)y;
|
|
|
|
/**
|
|
* Exclusive-or (XOR): Flip the bit in this ZXBitMatrix if the corresponding
|
|
* mask bit is set.
|
|
*
|
|
* @param mask XOR mask
|
|
*/
|
|
- (void)xor:(ZXBitMatrix *)mask;
|
|
|
|
/**
|
|
* Clears all bits (sets to false).
|
|
*/
|
|
- (void)clear;
|
|
|
|
/**
|
|
* Sets a square region of the bit matrix to true.
|
|
*
|
|
* @param left The horizontal position to begin at (inclusive)
|
|
* @param top The vertical position to begin at (inclusive)
|
|
* @param width The width of the region
|
|
* @param height The height of the region
|
|
*/
|
|
- (void)setRegionAtLeft:(int)left top:(int)top width:(int)width height:(int)height;
|
|
|
|
/**
|
|
* A fast method to retrieve one row of data from the matrix as a ZXBitArray.
|
|
*
|
|
* @param y The row to retrieve
|
|
* @param row An optional caller-allocated BitArray, will be allocated if null or too small
|
|
* @return The resulting BitArray - this reference should always be used even when passing
|
|
* your own row
|
|
*/
|
|
- (ZXBitArray *)rowAtY:(int)y row:(ZXBitArray *)row;
|
|
|
|
/**
|
|
* @param y row to set
|
|
* @param row ZXBitArray to copy from
|
|
*/
|
|
- (void)setRowAtY:(int)y row:(ZXBitArray *)row;
|
|
|
|
/**
|
|
* Modifies this ZXBitMatrix to represent the same but rotated 180 degrees
|
|
*/
|
|
- (void)rotate180;
|
|
|
|
/**
|
|
* This is useful in detecting the enclosing rectangle of a 'pure' barcode.
|
|
*
|
|
* @return {left,top,width,height} enclosing rectangle of all 1 bits, or null if it is all white
|
|
*/
|
|
- (ZXIntArray *)enclosingRectangle;
|
|
|
|
/**
|
|
* This is useful in detecting a corner of a 'pure' barcode.
|
|
*
|
|
* @return {x,y} coordinate of top-left-most 1 bit, or null if it is all white
|
|
*/
|
|
- (ZXIntArray *)topLeftOnBit;
|
|
|
|
- (ZXIntArray *)bottomRightOnBit;
|
|
|
|
- (NSString *)descriptionWithSetString:(NSString *)setString unsetString:(NSString *)unsetString;
|
|
|
|
/**
|
|
* @deprecated call descriptionWithSetString:unsetString: only, which uses \n line separator always
|
|
*/
|
|
- (NSString *)descriptionWithSetString:(NSString *)setString unsetString:(NSString *)unsetString
|
|
lineSeparator:(NSString *)lineSeparator DEPRECATED_ATTRIBUTE;
|
|
|
|
@end
|