code_app/sdk/scannerlib/HGScannerLibJni.cpp

#include <jni.h>
#include "HGScannerLib.h"

extern "C" JNIEXPORT jlong JNICALL Java_com_easing_java_HGScannerLib_LoadImage(
        JNIEnv* env, jclass clazz, jstring filePath)
{
    (void)clazz;
    printf("\nJava_com_easing_java_HGScannerLib_LoadImage\n");

    jboolean isCopy;
    const char* ptr = env->GetStringUTFChars(filePath, &isCopy);
    printf("filePath=%s\n", ptr);
    HGLibImage img = HGLib_LoadImage(ptr);
    printf("img=0x%p\n", img);
    env->ReleaseStringUTFChars(filePath, ptr);

    printf("\n");
    return (jlong)img;
}

extern "C" JNIEXPORT jboolean JNICALL Java_com_easing_java_HGScannerLib_SaveImage(
        JNIEnv* env, jclass clazz, jlong img, jstring filePath, jobject saveParam)
{
    (void)clazz;
    printf("\nJava_com_easing_java_HGScannerLib_SaveImage\n");

    HGLibSaveImageParam saveParam2 = {0};
    saveParam2.size = sizeof(HGLibSaveImageParam);

    jclass cls = env->GetObjectClass(saveParam);
    saveParam2.jpegQuality = (HGUInt)env->GetIntField(saveParam, env->GetFieldID(cls, "jpegQuality", "I"));
    saveParam2.tiffCompression = (HGUInt)env->GetIntField(saveParam, env->GetFieldID(cls, "tiffCompression", "I"));
    saveParam2.tiffJpegQuality = (HGUInt)env->GetIntField(saveParam, env->GetFieldID(cls, "tiffJpegQuality", "I"));
    saveParam2.ocr = (HGBool)env->GetBooleanField(saveParam, env->GetFieldID(cls, "ocr", "Z"));
    printf("jpegQuality=%u\n", saveParam2.jpegQuality);
    printf("tiffCompression=%u\n", saveParam2.tiffCompression);
    printf("tiffJpegQuality=%u\n", saveParam2.tiffJpegQuality);
    printf("ocr=%d\n", saveParam2.ocr);

    jboolean isCopy;
    const char* ptr = env->GetStringUTFChars(filePath, &isCopy);
    printf("img=0x%p, filePath=%s\n", (HGLibImage)img, ptr);
    HGBool ret = HGLib_SaveImage((HGLibImage)img, ptr, &saveParam2);
    printf("ret=%d\n", ret);
    env->ReleaseStringUTFChars(filePath, ptr);

    printf("\n");
    return (jboolean)ret;
}

extern "C" JNIEXPORT jboolean JNICALL Java_com_easing_java_HGScannerLib_ReleaseImage(
        JNIEnv* env, jclass clazz, jlong img)
{
    (void)env;
    (void)clazz;
    printf("\nJava_com_easing_java_HGScannerLib_ReleaseImage\n");

    HGBool ret = HGLib_ReleaseImage((HGLibImage)img);
    printf("ret=%d\n", ret);

    printf("\n");
    return (jboolean)ret;
}

extern "C" JNIEXPORT jobject JNICALL Java_com_easing_java_HGScannerLib_GetImageInfo(
        JNIEnv* env, jclass clazz, jlong img)
{
    (void)clazz;
    printf("\nJava_com_easing_java_HGScannerLib_GetImageInfo\n");

    jclass cls = env->FindClass("com/easing/java/HGLibImageInfo");
    jmethodID init = env->GetMethodID(cls, "<init>", "()V");
    jobject imgInfo = env->NewObject(cls, init);

    HGLibImageInfo imgInfo2 = {0};
    HGBool ret = HGLib_GetImageInfo((HGLibImage)img, &imgInfo2);
    printf("ret=%d\n", ret);
    if (ret)
    {
        env->SetIntField(imgInfo, env->GetFieldID(cls, "width", "I"), imgInfo2.width);
        env->SetIntField(imgInfo, env->GetFieldID(cls, "height", "I"), imgInfo2.height);
        env->SetIntField(imgInfo, env->GetFieldID(cls, "type", "I"), imgInfo2.type);
        env->SetIntField(imgInfo, env->GetFieldID(cls, "widthStep", "I"), imgInfo2.widthStep);
        env->SetIntField(imgInfo, env->GetFieldID(cls, "origin", "I"), imgInfo2.origin);
    }

    printf("\n");
    return imgInfo;
}

extern "C" JNIEXPORT jbyteArray JNICALL Java_com_easing_java_HGScannerLib_GetImageData(
        JNIEnv* env, jclass clazz, jlong img)
{
    (void)clazz;
    printf("\nJava_com_easing_java_HGScannerLib_GetImageData\n");

    jbyteArray imgData;

    HGByte *imgData2 = HGLib_GetImageData((HGLibImage)img);
    printf("imgData=0x%p\n", imgData2);
    if (NULL != imgData2)
    {
        HGLibImageInfo imgInfo = {0};
        if (HGLib_GetImageInfo((HGLibImage)img, &imgInfo))
        {
            imgData = env->NewByteArray(imgInfo.widthStep * imgInfo.height);
            env->SetByteArrayRegion(imgData, 0, imgInfo.widthStep * imgInfo.height, (const jbyte*)imgData2);
        }
        else
        {
            imgData = env->NewByteArray(0);
        }
    }
    else
    {
        imgData = env->NewByteArray(0);
    }

    printf("\n");
    return imgData;
}

extern "C" JNIEXPORT jobject JNICALL Java_com_easing_java_HGScannerLib_GetImageDpi(
        JNIEnv* env, jclass clazz, jlong img)
{
    (void)clazz;
    printf("\nJava_com_easing_java_HGScannerLib_GetImageDpi\n");

    jclass cls = env->FindClass("com/easing/java/HGLibImageDpi");
    jmethodID init = env->GetMethodID(cls, "<init>", "()V");
    jobject imgDpi = env->NewObject(cls, init);

    HGUInt xDpi, yDpi;
    HGBool ret = HGLib_GetImageDpi((HGLibImage)img, &xDpi, &yDpi);
    printf("ret=%d\n", ret);
    if (ret)
    {
        env->SetIntField(imgDpi, env->GetFieldID(cls, "xDpi", "I"), xDpi);
        env->SetIntField(imgDpi, env->GetFieldID(cls, "yDpi", "I"), yDpi);
    }

    printf("\n");
    return imgDpi;
}

JavaVM *g_VMDeviceHotPlug = NULL;
jobject g_objDeviceHotPlug = NULL;

static void HGAPI DeviceHotPlugEventFunc(HGUInt event, const HGChar *deviceName, HGPointer param)
{
    (void)param;
    if (NULL == g_VMDeviceHotPlug)
    {
        return;
    }

    HGBool needDetach = HGFALSE;
    JNIEnv *env = NULL;

    //获取当前native线程是否有没有被附加到jvm环境中
    int getEnvStat = g_VMDeviceHotPlug->GetEnv((void **)&env, JNI_VERSION_1_6);
    if (getEnvStat == JNI_EDETACHED)
    {
        // 如果没有，主动附加到jvm环境中，获取到env
        if (g_VMDeviceHotPlug->AttachCurrentThread((void **)&env, NULL) != 0)
        {
            return;
        }

        needDetach = HGTRUE;
    }

    //通过全局变量g_obj获取到要回调的类
    jclass cls = env->GetObjectClass(g_objDeviceHotPlug);
    if (NULL != cls)
    {
        jmethodID jmethodId = env->GetMethodID(cls, "onDeviceHotPlugEvent", "(ILjava/lang/String;)V");
        if (NULL != jmethodId)
        {
            env->CallVoidMethod(g_objDeviceHotPlug, jmethodId, (jint)event, env->NewStringUTF(deviceName));
        }
    }

    if (needDetach)
    {
        g_VMDeviceHotPlug->DetachCurrentThread();
    }
}

extern "C" JNIEXPORT jboolean JNICALL Java_com_easing_java_HGScannerLib_InitDevice(
        JNIEnv* env, jobject thiz)
{
    printf("\nJava_com_easing_java_HGScannerLib_InitDevice\n");

    if (NULL != g_VMDeviceHotPlug)
    {
        printf("Already Init Device\n");
        return (jboolean)HGFALSE;
    }

    env->GetJavaVM(&g_VMDeviceHotPlug);
    g_objDeviceHotPlug = env->NewGlobalRef(thiz);

    HGBool ret = HGLib_InitDevice(DeviceHotPlugEventFunc, NULL);
    printf("ret=%d\n", ret);
    if (!ret)
    {
        env->DeleteGlobalRef(g_objDeviceHotPlug);
        g_objDeviceHotPlug = NULL;
        g_VMDeviceHotPlug = NULL;
    }

    printf("\n");
    return (jboolean)ret;
}

extern "C" JNIEXPORT jboolean JNICALL Java_com_easing_java_HGScannerLib_DeinitDevice(
        JNIEnv* env, jclass clazz)
{
    (void)clazz;
    printf("\nJava_com_easing_java_HGScannerLib_DeinitDevice\n");

    if (NULL == g_VMDeviceHotPlug)
    {
        printf("Do not Init Device yet\n");
        return (jboolean)HGFALSE;
    }

    HGBool ret = HGLib_DeinitDevice();
    printf("ret=%d\n", ret);
    if (ret)
    {
        env->DeleteGlobalRef(g_objDeviceHotPlug);
        g_objDeviceHotPlug = NULL;
        g_VMDeviceHotPlug = NULL;
    }

    printf("\n");
    return (jboolean)ret;
}

extern "C" JNIEXPORT jobjectArray JNICALL Java_com_easing_java_HGScannerLib_GetDeviceNameList(
        JNIEnv* env, jclass clazz)
{
    (void)clazz;
    printf("\nJava_com_easing_java_HGScannerLib_GetDeviceNameList\n");

    jobjectArray devNameList;

    HGChar** devNameList2 = HGLib_GetDeviceNameList();
    printf("devNameList=0x%p\n", devNameList2);
    if (NULL != devNameList2)
    {
        HGUInt count = 0;
        HGChar** p = devNameList2;
        while (0 != *p)
        {
            printf("devName=%s\n", *p);
            ++count;
            ++p;
        }

        printf("count=%u\n", count);

        jclass cls = env->FindClass("java/lang/String");
        devNameList = env->NewObjectArray(count, cls, env->NewStringUTF(NULL));

        HGUInt i = 0;
        while (0 != devNameList2[i])
        {
            env->SetObjectArrayElement(devNameList, i, env->NewStringUTF(devNameList2[i]));
            ++i;
        }

        HGLib_ReleaseDeviceNameList(devNameList2);
    }
    else
    {
        printf("cound=%u\n", 0);

        jclass cls = env->FindClass("java/lang/String");
        devNameList = env->NewObjectArray(0, cls, env->NewStringUTF(NULL));
    }

    printf("\n");
    return devNameList;
}