/*
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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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#import "ZXByteArray.h"
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#import "ZXInvertedLuminanceSource.h"
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@interface ZXInvertedLuminanceSource ()
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@property (nonatomic, weak, readonly) ZXLuminanceSource *delegate;
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@end
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@implementation ZXInvertedLuminanceSource
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- (id)initWithDelegate:(ZXLuminanceSource *)delegate {
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self = [super initWithWidth:delegate.width height:delegate.height];
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if (self) {
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_delegate = delegate;
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}
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return self;
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}
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- (ZXByteArray *)rowAtY:(int)y row:(ZXByteArray *)row {
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row = [self.delegate rowAtY:y row:row];
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int width = self.width;
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int8_t *rowArray = row.array;
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for (int i = 0; i < width; i++) {
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rowArray[i] = (int8_t) (255 - (rowArray[i] & 0xFF));
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}
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return row;
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}
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- (ZXByteArray *)matrix {
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ZXByteArray *matrix = [self.delegate matrix];
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int length = self.width * self.height;
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ZXByteArray *invertedMatrix = [[ZXByteArray alloc] initWithLength:length];
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int8_t *invertedMatrixArray = invertedMatrix.array;
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int8_t *matrixArray = matrix.array;
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for (int i = 0; i < length; i++) {
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invertedMatrixArray[i] = (int8_t) (255 - (matrixArray[i] & 0xFF));
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}
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return invertedMatrix;
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}
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- (BOOL)cropSupported {
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return self.delegate.cropSupported;
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}
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- (ZXLuminanceSource *)crop:(int)left top:(int)top width:(int)aWidth height:(int)aHeight {
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return [[ZXInvertedLuminanceSource alloc] initWithDelegate:[self.delegate crop:left top:top width:aWidth height:aHeight]];
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}
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- (BOOL)rotateSupported {
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return self.delegate.rotateSupported;
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}
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/**
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* @return original delegate ZXLuminanceSource since invert undoes itself
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*/
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- (ZXLuminanceSource *)invert {
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return self.delegate;
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}
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- (ZXLuminanceSource *)rotateCounterClockwise {
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return [[ZXInvertedLuminanceSource alloc] initWithDelegate:[self.delegate rotateCounterClockwise]];
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}
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- (ZXLuminanceSource *)rotateCounterClockwise45 {
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return [[ZXInvertedLuminanceSource alloc] initWithDelegate:[self.delegate rotateCounterClockwise45]];
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}
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@end
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