/*
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* Copyright 2013 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 "ZXAztecCode.h"
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#import "ZXAztecEncoder.h"
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#import "ZXAztecWriter.h"
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#import "ZXBitMatrix.h"
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#import "ZXByteArray.h"
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#import "ZXEncodeHints.h"
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const NSStringEncoding ZX_AZTEC_DEFAULT_ENCODING = NSISOLatin1StringEncoding;
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@implementation ZXAztecWriter
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- (ZXBitMatrix *)encode:(NSString *)contents format:(ZXBarcodeFormat)format width:(int)width height:(int)height error:(NSError **)error {
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return [self encode:contents format:format width:width height:height hints:nil error:error];
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}
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- (ZXBitMatrix *)encode:(NSString *)contents format:(ZXBarcodeFormat)format width:(int)width height:(int)height hints:(ZXEncodeHints *)hints error:(NSError **)error {
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NSStringEncoding encoding = hints.encoding;
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NSNumber *eccPercent = hints.errorCorrectionPercent;
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NSNumber *layers = hints.aztecLayers;
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return [self encode:contents
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format:format
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width:width
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height:height
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encoding:encoding == 0 ? ZX_AZTEC_DEFAULT_ENCODING : encoding
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eccPercent:eccPercent == nil ? ZX_AZTEC_DEFAULT_EC_PERCENT : [eccPercent intValue]
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layers:layers == nil ? ZX_AZTEC_DEFAULT_LAYERS : [layers intValue]];
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}
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- (ZXBitMatrix *)encode:(NSString *)contents format:(ZXBarcodeFormat)format width:(int)width
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height:(int)height encoding:(NSStringEncoding)encoding eccPercent:(int)eccPercent layers:(int)layers {
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if (format != kBarcodeFormatAztec) {
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@throw [NSException exceptionWithName:NSInvalidArgumentException
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reason:[NSString stringWithFormat:@"Can only encode kBarcodeFormatAztec (%d), but got %d", kBarcodeFormatAztec, format]
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userInfo:nil];
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}
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NSData *data = [contents dataUsingEncoding:encoding];
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ZXByteArray *bytes = [[ZXByteArray alloc] initWithLength:(unsigned int)[data length]];
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memcpy(bytes.array, [data bytes], bytes.length * sizeof(int8_t));
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ZXAztecCode *aztec = [ZXAztecEncoder encode:bytes minECCPercent:eccPercent userSpecifiedLayers:layers];
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return [self renderResult:aztec width:width height:height];
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}
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- (ZXBitMatrix *)renderResult:(ZXAztecCode *)aztec width:(int)width height:(int)height {
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ZXBitMatrix *input = aztec.matrix;
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if (!input) {
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return nil;
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}
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int inputWidth = input.width;
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int inputHeight = input.height;
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int outputWidth = MAX(width, inputWidth);
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int outputHeight = MAX(height, inputHeight);
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int multiple = MIN(outputWidth / inputWidth, outputHeight / inputHeight);
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int leftPadding = (outputWidth - (inputWidth * multiple)) / 2;
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int topPadding = (outputHeight - (inputHeight * multiple)) / 2;
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ZXBitMatrix *output = [[ZXBitMatrix alloc] initWithWidth:outputWidth height:outputHeight];
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for (int inputY = 0, outputY = topPadding; inputY < inputHeight; inputY++, outputY += multiple) {
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// Write the contents of this row of the barcode
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for (int inputX = 0, outputX = leftPadding; inputX < inputWidth; inputX++, outputX += multiple) {
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if ([input getX:inputX y:inputY]) {
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[output setRegionAtLeft:outputX top:outputY width:multiple height:multiple];
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}
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}
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}
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return output;
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}
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@end
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