zxing-cpp c++版本的编译

一、动态库编译

工程地址：https://github.com/zxing-cpp/zxing-cpp

编译：

git clone https://github.com/zxing-cpp/zxing-cpp.git --recursive --single-branch --depth 1
cmake -S zxing-cpp -B zxing-cpp.release -DCMAKE_BUILD_TYPE=Release
cmake --build zxing-cpp.release -j8 --config Release

编译过程中会遇到找不到stb,qt的问题，解决方法为：

1）缺少stb

下载stb：

cd {你用来保存stb包的文件夹}
git clone https://github.com/nothings/stb.git

修改：zxing-cpp/zxing.cmake

macro(zxing_add_package_stb)
    unset (STB_FOUND CACHE)
    include_directories("{你用来保存stb包的文件夹}/stb")
    add_library(stb::stb INTERFACE IMPORTED)
    target_include_directories(stb::stb INTERFACE "{你用来保存stb包的文件夹}/stb")

    if (BUILD_DEPENDENCIES STREQUAL "AUTO")
        find_package(PkgConfig)
        # pkg_check_modules (STB IMPORTED_TARGET stb)
    elseif (BUILD_DEPENDENCIES STREQUAL "LOCAL")
        find_package(PkgConfig REQUIRED)
        # pkg_check_modules (STB REQUIRED IMPORTED_TARGET stb)
    endif()

    # if (NOT STB_FOUND)
    #     include(FetchContent)
    #     FetchContent_Declare (stb
    #         GIT_REPOSITORY https://github.com/nothings/stb.git)
    #     FetchContent_MakeAvailable (stb)
    #     add_library(stb::stb INTERFACE IMPORTED)
    #     target_include_directories(stb::stb INTERFACE ${stb_SOURCE_DIR})
    # else()
    #     add_library(stb::stb ALIAS PkgConfig::STB)
    # endif()
endmacro()

2）缺少qt

将CMakeLists.txt文件中，87行到102行注释掉。这样不会影响到动态库的使用

3）编译

git clone https://github.com/zxing-cpp/zxing-cpp.git --recursive --single-branch --depth 1
cmake -S zxing-cpp -B zxing-cpp.release -DCMAKE_BUILD_TYPE=Release
cmake --build zxing-cpp.release -j8 --config Release

参考链接： 

 ubuntu编译zxing-cpp踩坑_autogen: no valid qt version found for target-CSDN博客

4）测试用例

#include "ZXing/ReadBarcode.h"
#include <iostream>

int main(int argc, char** argv)
{
    int width, height;
    unsigned char* data;
    // load your image data from somewhere. ImageFormat::Lum assumes grey scale image data.

    auto image = ZXing::ImageView(data, width, height, ZXing::ImageFormat::Lum);
    auto options = ZXing::ReaderOptions().setFormats(ZXing::BarcodeFormat::Any);
    auto barcodes = ZXing::ReadBarcodes(image, options);

    for (const auto& b : barcodes)
        std::cout << ZXing::ToString(b.format()) << ": " << b.text() << "\n";

    return 0;
}