/*
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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 "ZXQRCodeAlignmentPattern.h"
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@interface ZXQRCodeAlignmentPattern ()
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@property (nonatomic, assign, readonly) float estimatedModuleSize;
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@end
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@implementation ZXQRCodeAlignmentPattern
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- (id)initWithPosX:(float)posX posY:(float)posY estimatedModuleSize:(float)estimatedModuleSize {
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if (self = [super initWithX:posX y:posY]) {
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_estimatedModuleSize = estimatedModuleSize;
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}
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return self;
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}
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- (BOOL)aboutEquals:(float)moduleSize i:(float)i j:(float)j {
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if (fabsf(i - self.y) <= moduleSize && fabsf(j - self.x) <= moduleSize) {
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float moduleSizeDiff = fabsf(moduleSize - self.estimatedModuleSize);
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return moduleSizeDiff <= 1.0f || moduleSizeDiff <= self.estimatedModuleSize;
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}
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return NO;
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}
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- (ZXQRCodeAlignmentPattern *)combineEstimateI:(float)i j:(float)j newModuleSize:(float)newModuleSize {
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float combinedX = (self.x + j) / 2.0f;
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float combinedY = (self.y + i) / 2.0f;
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float combinedModuleSize = (self.estimatedModuleSize + newModuleSize) / 2.0f;
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return [[ZXQRCodeAlignmentPattern alloc] initWithPosX:combinedX posY:combinedY estimatedModuleSize:combinedModuleSize];
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}
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@end
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