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)
{
    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 jint JNICALL Java_com_easing_java_HGScannerLib_SaveImage(
        JNIEnv* env, jclass clazz, jlong img, jstring filePath, jobject saveParam)
{
    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->GetIntField(saveParam, env->GetFieldID(cls, "ocr", "I"));
    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 ret;
}

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

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

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

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

    HGLibImageInfo imgInfo2 = {0};
    HGBool ret = HGLib_GetImageInfo((HGLibImage)img, &imgInfo2);
    printf("ret=%d\n", ret);
    if (ret)
    {
        jclass cls = env->GetObjectClass(imgInfo);
        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 ret;
}

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

    jbyteArray ret;
    HGByte *imgData2 = HGLib_GetImageData((HGLibImage)img);
    if (NULL != imgData2)
    {
        HGLibImageInfo imgInfo = {0};
        if (HGLib_GetImageInfo((HGLibImage)img, &imgInfo))
        {
            ret = env->NewByteArray(imgInfo.widthStep * imgInfo.height);
            env->SetByteArrayRegion(ret, 0, imgInfo.widthStep * imgInfo.height, (const jbyte*)imgData2);
        }
    }

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