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BarcodeReader.cpp
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BarcodeReader.cpp
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/*
* Copyright 2016 Nu-book Inc.
*
* 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.
*/
#include "JNIUtils.h"
#include "MultiFormatReader.h"
#include "DecodeHints.h"
#include "Result.h"
#include <exception>
#include <vector>
#include <stdexcept>
// This is what we have at Java's side and must be kept in sync with.
enum class JavaBarcodeFormat : int {
AZTEC,
CODABAR,
CODE_39,
CODE_93,
CODE_128,
DATA_MATRIX,
EAN_8,
EAN_13,
ITF,
MAXICODE,
PDF_417,
QR_CODE,
RSS_14,
RSS_EXPANDED,
UPC_A,
UPC_E
};
static ZXing::BarcodeFormat ToZXingBarcodeFormat(JNIEnv* env, JavaBarcodeFormat format)
{
switch (format) {
case JavaBarcodeFormat::AZTEC : return ZXing::BarcodeFormat::Aztec;
case JavaBarcodeFormat::CODABAR : return ZXing::BarcodeFormat::Codabar;
case JavaBarcodeFormat::CODE_39 : return ZXing::BarcodeFormat::Code39;
case JavaBarcodeFormat::CODE_93 : return ZXing::BarcodeFormat::Code93;
case JavaBarcodeFormat::CODE_128 : return ZXing::BarcodeFormat::Code128;
case JavaBarcodeFormat::DATA_MATRIX : return ZXing::BarcodeFormat::DataMatrix;
case JavaBarcodeFormat::EAN_8 : return ZXing::BarcodeFormat::EAN8;
case JavaBarcodeFormat::EAN_13 : return ZXing::BarcodeFormat::EAN13;
case JavaBarcodeFormat::ITF : return ZXing::BarcodeFormat::ITF;
case JavaBarcodeFormat::MAXICODE : return ZXing::BarcodeFormat::MaxiCode;
case JavaBarcodeFormat::PDF_417 : return ZXing::BarcodeFormat::PDF417;
case JavaBarcodeFormat::QR_CODE : return ZXing::BarcodeFormat::QRCode;
case JavaBarcodeFormat::RSS_14 : return ZXing::BarcodeFormat::DataBar;
case JavaBarcodeFormat::RSS_EXPANDED : return ZXing::BarcodeFormat::DataBarExpanded;
case JavaBarcodeFormat::UPC_A : return ZXing::BarcodeFormat::UPCA;
case JavaBarcodeFormat::UPC_E : return ZXing::BarcodeFormat::UPCE;
}
ThrowJavaException(env, "Invalid format");
}
static JavaBarcodeFormat FromZXingBarcodeFormat(ZXing::BarcodeFormat format)
{
switch (format) {
case ZXing::BarcodeFormat::Aztec : return JavaBarcodeFormat::AZTEC;
case ZXing::BarcodeFormat::Codabar : return JavaBarcodeFormat::CODABAR;
case ZXing::BarcodeFormat::Code39 : return JavaBarcodeFormat::CODE_39;
case ZXing::BarcodeFormat::Code93 : return JavaBarcodeFormat::CODE_93;
case ZXing::BarcodeFormat::Code128 : return JavaBarcodeFormat::CODE_128;
case ZXing::BarcodeFormat::DataMatrix : return JavaBarcodeFormat::DATA_MATRIX;
case ZXing::BarcodeFormat::EAN8 : return JavaBarcodeFormat::EAN_8;
case ZXing::BarcodeFormat::EAN13 : return JavaBarcodeFormat::EAN_13;
case ZXing::BarcodeFormat::ITF : return JavaBarcodeFormat::ITF;
case ZXing::BarcodeFormat::MaxiCode : return JavaBarcodeFormat::MAXICODE;
case ZXing::BarcodeFormat::PDF417 : return JavaBarcodeFormat::PDF_417;
case ZXing::BarcodeFormat::QRCode : return JavaBarcodeFormat::QR_CODE;
case ZXing::BarcodeFormat::DataBar : return JavaBarcodeFormat::RSS_14;
case ZXing::BarcodeFormat::DataBarExpanded : return JavaBarcodeFormat::RSS_EXPANDED;
case ZXing::BarcodeFormat::UPCA : return JavaBarcodeFormat::UPC_A;
case ZXing::BarcodeFormat::UPCE : return JavaBarcodeFormat::UPC_E;
default: break;
}
throw std::invalid_argument("Invalid format");
}
static ZXing::BarcodeFormats GetFormats(JNIEnv* env, jintArray formats)
{
ZXing::BarcodeFormats result = ZXing::BarcodeFormat::None;
jsize len = env->GetArrayLength(formats);
if (len > 0) {
std::vector<jint> elems(len);
env->GetIntArrayRegion(formats, 0, elems.size(), elems.data());
for (jsize i = 0; i < len; ++i) {
result |= ToZXingBarcodeFormat(env, static_cast<JavaBarcodeFormat>(elems[i]));
}
}
return result;
}
extern "C" JNIEXPORT jlong JNICALL
Java_com_zxing_BarcodeReader_createInstance(JNIEnv* env, jobject thiz, jintArray formats)
{
try
{
ZXing::DecodeHints hints;
if (formats != nullptr) {
hints.setFormats(GetFormats(env, formats));
}
return reinterpret_cast<jlong>(new ZXing::MultiFormatReader(hints));
}
catch (const std::exception& e)
{
ThrowJavaException(env, e.what());
}
catch (...)
{
ThrowJavaException(env, "Unknown exception");
}
return 0;
}
extern "C" JNIEXPORT void JNICALL
Java_com_zxing_BarcodeReader_destroyInstance(JNIEnv* env, jobject thiz, jlong objPtr)
{
try
{
delete reinterpret_cast<ZXing::MultiFormatReader*>(objPtr);
}
catch (const std::exception& e)
{
ThrowJavaException(env, e.what());
}
catch (...)
{
ThrowJavaException(env, "Unknown exception");
}
}
extern "C" JNIEXPORT jint JNICALL
Java_com_zxing_BarcodeReader_readBarcode(JNIEnv* env, jobject thiz, jlong objPtr, jobject bitmap, jint left, jint top, jint width, jint height, jobjectArray result)
{
try
{
auto reader = reinterpret_cast<ZXing::MultiFormatReader*>(objPtr);
auto binImage = BinaryBitmapFromJavaBitmap(env, bitmap, left, top, width, height);
auto readResult = reader->read(*binImage);
if (readResult.isValid()) {
env->SetObjectArrayElement(result, 0, ToJavaString(env, readResult.text()));
return static_cast<int>(FromZXingBarcodeFormat(readResult.format()));
}
}
catch (const std::exception& e)
{
ThrowJavaException(env, e.what());
}
catch (...)
{
ThrowJavaException(env, "Unknown exception");
}
return -1;
}