QR-Code-scanner: integrate QUIRC library, implement QrDecoder, drop ZBar

.gitmodules

@@ -2,3 +2,6 @@
 	path = monero
 	url = https://github.com/monero-project/monero
 	ignore = all
+[submodule "external/quirc"]
+	path = external/quirc
+	url = https://github.com/dlbeer/quirc/

CMakeLists.txt

@@ -131,12 +131,8 @@ message(STATUS "OpenSSL: Version ${OPENSSL_VERSION}")
 message(STATUS "OpenSSL: include dir at ${OPENSSL_INCLUDE_DIR}")
 message(STATUS "OpenSSL: libraries at ${OPENSSL_LIBRARIES} ${OPENSSL_SSL_LIBRARIES}")
 
-# Zbar (for QR scanner)
 if(WITH_SCANNER)
     add_definitions(-DWITH_SCANNER)
-    find_package(ZBar0 REQUIRED)
-    message(STATUS "libzbar: include dir at ${ZBAR_INCLUDE_DIR}")
-    message(STATUS "libzbar: libraries at ${ZBAR_LIBRARIES}")
 endif()
 
 # Sodium
@@ -563,6 +559,6 @@ if (HIDAPI_FOUND OR LibUSB_COMPILE_TEST_PASSED)
   endif()
 endif()
 
+add_subdirectory(external)
 add_subdirectory(translations)
-
 add_subdirectory(src)

Dockerfile.android

@@ -151,25 +151,6 @@ RUN set -ex \
     && make -j${THREADS} install \
     && rm -rf $(pwd)
 
-RUN git clone https://github.com/ZBar/ZBar.git --depth 1 \
-    && cd ZBar \
-    && git reset --hard 854a5d97059e395807091ac4d80c53f7968abb8f \
-    && sed -i 's/SHARED/STATIC/' android/jni/Android.mk \
-    && sed -i -E 's/(.*BUILD_STATIC_LIBRARY.*)/LOCAL_CPP_FEATURES := exceptions rtti features\n\0/' android/jni/Android.mk \
-    && sed -i -E 's/(.*BUILD_STATIC_LIBRARY.*)/LOCAL_CFLAGS := -Wno-multichar\n\0/' android/jni/Android.mk \
-    && sed -i -E 's/(.*BUILD_STATIC_LIBRARY.*)/LOCAL_CFLAGS += -D_ANDROID\n\0/' android/jni/Android.mk \
-    && sed -i -E 's/(.*BUILD_STATIC_LIBRARY.*)/LOCAL_CFLAGS += -DLIBDIR="\\".\\""\n\0/' android/jni/Android.mk \
-    && sed -i -E 's/(.*BUILD_STATIC_LIBRARY.*)/LOCAL_CFLAGS += -DBUILDING_LIBICONV\n\0/' android/jni/Android.mk \
-    && sed -i -E 's/(.*BUILD_STATIC_LIBRARY.*)/LOCAL_CFLAGS += -DBUILDING_LIBCHARSET\n\0/' android/jni/Android.mk \
-    && sed -i -E 's/(.*BUILD_STATIC_LIBRARY.*)/LOCAL_CFLAGS += -DIN_LIBRARY\n\0/' android/jni/Android.mk \
-    && sed -i -E 's/(.*BUILD_STATIC_LIBRARY.*)/LOCAL_CFLAGS += -fno-stack-protector\n\0/' android/jni/Android.mk \
-    && echo "APP_ABI := arm64-v8a \nAPP_STL := c++_shared \nTARGET_PLATFORM := ${ANDROID_API} \nTARGET_ARCH_ABI := arm64-v8a \nAPP_CFLAGS +=  -target aarch64-none-linux-android -fexceptions -fstack-protector-strong -fno-limit-debug-info -mfloat-abi=softfp -fno-builtin-memmove -fno-omit-frame-pointer -fno-stack-protector\n" \
-       >> android/jni/Application.mk \
-    && cd android \
-    && CC=${ANDROID_CLANG} CXX=${ANDROID_CLANGPP} ${ANDROID_NDK_ROOT}/ndk-build ICONV_SRC=${WORKDIR}/libiconv-${ICONV_VERSION} -B V=1 NDK_APPLICATION_MK=jni/Application.mk \
-    && cp obj/local/arm64-v8a/lib* ${PREFIX}/lib \
-    && cp -r ../include/* ${PREFIX}/include
-
 RUN git clone -b libgpg-error-1.38 --depth 1 git://git.gnupg.org/libgpg-error.git \
     && cd libgpg-error \
     && git reset --hard 71d278824c5fe61865f7927a2ed1aa3115f9e439 \

README.md

@@ -217,13 +217,13 @@ The following instructions will fetch Qt from your distribution's repositories i
 
     - For Ubuntu
 
-      `sudo apt install qtmultimedia5-dev qml-module-qtmultimedia libzbar-dev`
+      `sudo apt install qtmultimedia5-dev qml-module-qtmultimedia`
 
     - For Gentoo
 
       The *qml* USE flag must be enabled.
 
-      `emerge dev-qt/qtmultimedia:5 media-gfx/zbar`
+      `emerge dev-qt/qtmultimedia:5`
 
 
 3. Clone repository
@@ -290,12 +290,6 @@ The Monero GUI on Windows is 64 bits only; 32-bit Windows GUI builds are not off
     pacman -S mingw-w64-x86_64-toolchain make mingw-w64-x86_64-cmake mingw-w64-x86_64-boost mingw-w64-x86_64-openssl mingw-w64-x86_64-zeromq mingw-w64-x86_64-libsodium mingw-w64-x86_64-hidapi mingw-w64-x86_64-protobuf-c mingw-w64-x86_64-libusb mingw-w64-x86_64-libgcrypt
     ```
 
-    Optional : To build the flag `WITH_SCANNER`
-
-      ```
-      pacman -S mingw-w64-x86_64-zbar
-      ```
-
     You find more details about those dependencies in the [Monero documentation](https://github.com/monero-project/monero). Note that that there is no more need to compile Boost from source; like everything else, you can install it now with a MSYS2 package.
 
 4. Install Qt5

cmake/FindZBar0.cmake

@@ -1,38 +0,0 @@
-# from http://code.google.com/p/low-cost-vision-2012/source/browse/CMakeModules/FindZBar0.cmake?name=2-helium-1&r=d61f248bd5565b3c086bf4769a04bfd98f7079df
-# - Try to find ZBar
-# This will define
-#
-#  ZBAR_FOUND - 
-#  ZBAR_LIBRARY_DIR - 
-#  ZBAR_INCLUDE_DIR - 
-#  ZBAR_LIBRARIES - 
-#
-
-find_package(PkgConfig)
-if(PkgConfig_FOUND)
-  pkg_check_modules(PC_ZBAR QUIET zbar)
-  if(PC_ZBAR_FOUND)
-    set(ZBAR_DEFINITIONS ${PC_ZBAR_CFLAGS_OTHER})
-    find_library(ZBAR_LIBRARIES NAMES zbar HINTS ${PC_ZBAR_LIBDIR} ${PC_ZBAR_LIBRARY_DIRS})
-    find_path(ZBAR_INCLUDE_DIR Decoder.h HINTS ${PC_ZBAR_INCLUDEDIR} ${PC_ZBAR_INCLUDE_DIRS} PATH_SUFFIXES zbar)
-  endif()
-endif()
-
-if(NOT ZBAR_LIBRARIES AND ANDROID)
-  find_library(ZBARJNI_LIBRARY NAMES zbarjni)
-  find_library(ICONV_LIBRARY NAMES iconv)
-  if(ZBARJNI_LIBRARY AND ICONV_LIBRARY)
-    set(ZBAR_LIBRARIES ${ZBARJNI_LIBRARY} ${ICONV_LIBRARY})
-  endif()
-endif()
-
-if(NOT ZBAR_INCLUDE_DIR)
-  find_path(ZBAR_H_PATH zbar.h)
-  if(ZBAR_H_PATH)
-    set(ZBAR_INCLUDE_DIR "${ZBAR_H_PATH}/zbar")
-  endif()
-endif()
-
-include(FindPackageHandleStandardArgs)
-find_package_handle_standard_args(ZBAR  DEFAULT_MSG  ZBAR_LIBRARIES ZBAR_INCLUDE_DIR)
-message(STATUS "Found zbar libraries ${ZBAR_LIBRARIES}")

external/CMakeLists.txt

@@ -0,0 +1,7 @@
+add_library(quirc STATIC
+    quirc/lib/decode.c
+    quirc/lib/identify.c
+    quirc/lib/quirc.c
+    quirc/lib/version_db.c
+)
+target_include_directories(quirc PUBLIC quirc/lib)

external/quirc

@@ -0,0 +1 @@
+Subproject commit 7e7ab596e4d0988faf1c12ae89c354b114181c40

src/CMakeLists.txt

@@ -55,13 +55,6 @@ if(ENABLE_PASS_STRENGTH_METER)
     )
 endif()
 
-if(WITH_SCANNER)
-    file(GLOB QR_CODE_FILES
-    	"QR-Code-scanner/*.h"
-    	"QR-Code-scanner/*.cpp"
-    )
-endif()
-
 set(EXECUTABLE_FLAG)
 if(MINGW)
     set(EXECUTABLE_FLAG WIN32)
@@ -84,7 +77,6 @@ endif()
 set(monero_wallet_gui_sources
     ${SOURCE_FILES}
     ${PASS_STRENGTH_FILES}
-    ${QR_CODE_FILES}
     ${RESOURCES}
 )
 
@@ -128,7 +120,6 @@ target_include_directories(monero-wallet-gui PUBLIC
     ${X11_INCLUDE_DIR}
     ${Boost_INCLUDE_DIRS}
     ${OPENSSL_INCLUDE_DIR}
-    ${ZBAR_INCLUDE_DIR}
 )
 
 target_compile_definitions(monero-wallet-gui
@@ -159,6 +150,7 @@ target_link_libraries(monero-wallet-gui
     ${EXTRA_LIBRARIES}
     ${ICU_LIBRARIES}
     openpgp
+    qrdecoder
     translations
 )
 
@@ -171,16 +163,14 @@ if(X11_FOUND)
 endif()
 
 if(WITH_SCANNER)
-    if(NOT ANDROID)
+    target_link_libraries(monero-wallet-gui qrscanner)
+    if(LINUX AND NOT ANDROID)
         target_link_libraries(monero-wallet-gui
-            ${ZBAR_LIBRARIES}
             jpeg
             v4l2
             v4lconvert
             rt
         )
-    else()
-        target_link_libraries(monero-wallet-gui ${ZBAR_LIBRARIES})
     endif()
 endif()
 

src/QR-Code-scanner/CMakeLists.txt

@@ -1,4 +1,21 @@
-file(GLOB_RECURSE SRC_SOURCES *.cpp)
-file(GLOB_RECURSE SRC_HEADERS *.h)
-
+add_library(qrdecoder STATIC
+    Decoder.cpp
+)
+target_link_libraries(qrdecoder
+    PUBLIC
+        Qt5::Gui
+    PRIVATE
+        quirc
+)
 
+if(WITH_SCANNER)
+    add_library(qrscanner
+        QrCodeScanner.cpp
+        QrScanThread.cpp
+    )
+    target_link_libraries(qrscanner
+        PUBLIC
+            Qt5::Multimedia
+            qrdecoder
+    )
+endif()

src/QR-Code-scanner/Decoder.cpp

@@ -0,0 +1,71 @@
+#include "Decoder.h"
+
+#include <limits>
+
+#include "quirc.h"
+
+QrDecoder::QrDecoder()
+    : m_qr(quirc_new())
+{
+    if (m_qr == nullptr)
+    {
+        throw std::runtime_error("QUIRC: failed to allocate memory");
+    }
+}
+
+QrDecoder::~QrDecoder()
+{
+    quirc_destroy(m_qr);
+}
+
+std::vector<std::string> QrDecoder::decode(const QImage &image)
+{
+    if (image.format() == QImage::Format_Grayscale8)
+    {
+        return decodeGrayscale8(image);
+    }
+    return decodeGrayscale8(image.convertToFormat(QImage::Format_Grayscale8));
+}
+
+std::vector<std::string> QrDecoder::decodeGrayscale8(const QImage &image)
+{
+    if (quirc_resize(m_qr, image.width(), image.height()) < 0)
+    {
+        throw std::runtime_error("QUIRC: failed to allocate video memory");
+    }
+
+    uint8_t *rawImage = quirc_begin(m_qr, nullptr, nullptr);
+    if (rawImage == nullptr)
+    {
+        throw std::runtime_error("QUIRC: failed to get image buffer");
+    }
+#if QT_VERSION >= QT_VERSION_CHECK(5, 10, 0)
+    std::copy(image.constBits(), image.constBits() + image.sizeInBytes(), rawImage);
+#else
+    std::copy(image.constBits(), image.constBits() + image.byteCount(), rawImage);
+#endif
+    quirc_end(m_qr);
+
+    const int count = quirc_count(m_qr);
+    if (count < 0)
+    {
+        throw std::runtime_error("QUIRC: failed to get the number of recognized QR-codes");
+    }
+
+    std::vector<std::string> result;
+    result.reserve(static_cast<size_t>(count));
+    for (int index = 0; index < count; ++index)
+    {
+        quirc_code code;
+        quirc_extract(m_qr, index, &code);
+
+        quirc_data data;
+        const quirc_decode_error_t err = quirc_decode(&code, &data);
+        if (err == QUIRC_SUCCESS)
+        {
+            result.emplace_back(&data.payload[0], &data.payload[data.payload_len]);
+        }
+    }
+
+    return result;
+}

src/QR-Code-scanner/Decoder.h

@@ -0,0 +1,21 @@
+#include <QImage>
+
+struct quirc;
+
+class QrDecoder
+{
+public:
+    QrDecoder(const QrDecoder &) = delete;
+    QrDecoder &operator=(const QrDecoder &) = delete;
+
+    QrDecoder();
+    ~QrDecoder();
+
+    std::vector<std::string> decode(const QImage &image);
+
+private:
+    std::vector<std::string> decodeGrayscale8(const QImage &image);
+
+private:
+    quirc *m_qr;
+};

src/QR-Code-scanner/QrCodeScanner.cpp

@@ -27,7 +27,6 @@
 // THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 #include "QrCodeScanner.h"
-#include <WalletManager.h>
 #include <QVideoProbe>
 #include <QCamera>
 
@@ -40,7 +39,7 @@ QrCodeScanner::QrCodeScanner(QObject *parent)
     m_probe = new QVideoProbe(this);
     m_thread = new QrScanThread(this);
     m_thread->start();
-    QObject::connect(m_thread, SIGNAL(decoded(int, QString)), this, SIGNAL(decoded(int, QString)));
+    QObject::connect(m_thread, SIGNAL(decoded(QString)), this, SIGNAL(decoded(QString)));
     QObject::connect(m_thread, SIGNAL(notifyError(const QString &, bool)), this, SIGNAL(notifyError(const QString &, bool)));
     connect(m_probe, SIGNAL(videoFrameProbed(QVideoFrame)), this, SLOT(processFrame(QVideoFrame)));
 }

src/QR-Code-scanner/QrCodeScanner.h

@@ -56,8 +56,7 @@ public Q_SLOTS:
 Q_SIGNALS:
     void enabledChanged();
 
-    void decoded(int type, const QString &data);
-    void decode(int type, const QString &data);
+    void decoded(const QString &data);
     void notifyError(const QString &error, bool warning = false);
 
 protected:

src/QR-Code-scanner/QrScanThread.cpp

@@ -38,62 +38,15 @@ QrScanThread::QrScanThread(QObject *parent)
       : QThread(parent)
        ,m_running(true)
 {
-    m_scanner.set_handler(*this);
 }
 
-void QrScanThread::image_callback(zbar::Image &image)
-{
-    qDebug() << "image_callback :  Found Code ! " ;
-    for(zbar::Image::SymbolIterator sym = image.symbol_begin();
-        sym != image.symbol_end();
-        ++sym)
-        if(!sym->get_count()) {
-            QString data = QString::fromStdString(sym->get_data());
-            emit decoded(sym->get_type(), data);
-        }
-}
-
-void QrScanThread::processZImage(zbar::Image &image)
-{
-    m_scanner.recycle_image(image);
-    zbar::Image tmp = image.convert(*(long*)"Y800");
-    m_scanner.scan(tmp);
-    image.set_symbols(tmp.get_symbols());
-}
-
-bool QrScanThread::zimageFromQImage(const QImage &qimg, zbar::Image &dst)
-{
-    switch( qimg.format() ){
-        case QImage::Format_RGB32 :
-        case QImage::Format_ARGB32 :
-        case QImage::Format_ARGB32_Premultiplied : 
-            break;
-        default :
-            emit notifyError(QString("Invalid QImage Format !"));
-            return false;
-    }
-    unsigned int bpl( qimg.bytesPerLine() ), width( bpl / 4), height( qimg.height());
-    dst.set_size(width, height);
-    dst.set_format("BGR4");
-#if QT_VERSION >= QT_VERSION_CHECK(5, 10, 0)
-    unsigned long datalen = qimg.sizeInBytes();
-#else
-    unsigned long datalen = qimg.byteCount();
-#endif
-    dst.set_data(qimg.bits(), datalen);
-    if((width * 4 != bpl) || (width * height * 4 > datalen)){
-        emit notifyError(QString("QImage to Zbar::Image failed !"));
-        return false;
-    }
-    return true;
-}
 void QrScanThread::processQImage(const QImage &qimg)
 {
     try {
-        m_image = QSharedPointer<zbar::Image>(new zbar::Image());
-        if( ! zimageFromQImage(qimg, *m_image) )
-            return;
-        processZImage(*m_image);
+        for (const std::string &code : m_decoder.decode(qimg))
+        {
+            emit decoded(QString::fromStdString(code));
+        }
     }
     catch(std::exception &e) {
         qDebug() << "ERROR: " << e.what();

src/QR-Code-scanner/QrScanThread.h

@@ -35,9 +35,10 @@
 #include <QEvent>
 #include <QVideoFrame>
 #include <QCamera>
-#include <zbar.h>
 
-class QrScanThread : public QThread, public zbar::Image::Handler
+#include "Decoder.h"
+
+class QrScanThread : public QThread
 {
     Q_OBJECT
 
@@ -47,20 +48,16 @@ public:
     virtual void stop();
 
 Q_SIGNALS:
-    void decoded(int type, const QString &data);
+    void decoded(const QString &data);
     void notifyError(const QString &error, bool warning = false);
 
 protected:
     virtual void run();
     void processVideoFrame(const QVideoFrame &);
     void processQImage(const QImage &);
-    void processZImage(zbar::Image &image);
-    virtual void image_callback(zbar::Image &image);
-    bool zimageFromQImage(const QImage&, zbar::Image &);
 
 private:
-    zbar::ImageScanner m_scanner;
-    QSharedPointer<zbar::Image> m_image;
+    QrDecoder m_decoder;
     bool m_running;
     QMutex m_mutex;
     QWaitCondition m_waitCondition;