1. 编译ncnn

1. 编译opencv和portobuf,也可以直接下载windows版本的opencv
2. 安装vulkan，直接取官网下载
3. 下载ncnn源码：
    git clone https://github.com/Tencent/ncnn.git
4. 下载补充包：
    cd ncnn
    git submodule update --init
5. 打开vs终端(X64 native tools...)
6. 输入编译脚本：
    // 生成Makefile, -DNCNN_VULKAN=ON 编译vulkan，使用gpu加速
    cmake  -G"NMake Makefiles" -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX=./install -DProtobuf_INCLUDE_DIR=D:/working_soft/protobuf/protobuf-3.4.0/build-vs2019/install/include -DProtobuf_LIBRARIES=D:/working_soft/protobuf/protobuf-3.4.0/build-vs2019/install/lib/libprotobuf.lib -DProtobuf_PROTOC_EXECUTABLE=D:/working_soft/protobuf/protobuf-3.4.0/build-vs2019/install/bin/protoc.exe -DNCNN_VULKAN=ON ..
    // 编译
    nmake 
    // 安装
    nmake install

2. 配置ncnn

在vs studio中ncnn配置如下，附加依赖项必须按照文中顺序

包含目录
    D:\working_soft\Vulkan\Include
    D:\working_soft\opencv34111\build\install\include
    D:\working_soft\opencv34111\build\install\include\opencv2
    D:\working_soft\ncnn\ncnn\ncnn\build\install\include
    D:\working_soft\ncnn\ncnn\ncnn\build\install\include\ncnn
附加库目录
    D:\working_soft\Vulkan\Lib
    D:\working_soft\opencv34111\build\install\x64\vc16\lib
    D:\working_soft\ncnn\ncnn\ncnn\build\install\lib
    D:\working_soft\protobuf\protobuf-3.4.0\build-vs2019\install\lib
附加依赖项
    opencv_world341.lib
    D:\working_soft\ncnn\ncnn\ncnn\build\install\lib\ncnn.lib
    D:\working_soft\Vulkan\Lib\vulkan-1.lib
    D:\working_soft\ncnn\ncnn\ncnn\build\install\lib\SPIRV.lib
    D:\working_soft\ncnn\ncnn\ncnn\build\install\lib\glslang.lib
    D:\working_soft\ncnn\ncnn\ncnn\build\install\lib\MachineIndependent.lib
    D:\working_soft\ncnn\ncnn\ncnn\build\install\lib\OGLCompiler.lib
    D:\working_soft\ncnn\ncnn\ncnn\build\install\lib\OSDependent.lib
    D:\working_soft\ncnn\ncnn\ncnn\build\install\lib\GenericCodeGen.lib

3. 调用Vulkan

示例：
    ncnn::create_gpu_instance();
    ncnn::VulkanDevice vkdev(1); // 使用GPU1
    ncnn::Net yolov5; 
    yolov5.opt.use_packing_layout = true;
    yolov5.opt.use_vulkan_compute = true; // 使用vulkan
    yolov5.opt.use_bf16_storage = true;
    yolov5.set_vulkan_device(&vkdev);
    yolov5.load_param("./model/yolov5s_6.0.param");
    yolov5.load_model("./model/yolov5s_6.0.bin");