JNIEXPORT void JNICALL
JNI_FN(MuPDFCore_saveImageInternal)(JNIEnv * env, jobject thiz, jobject bitmap, int imgW, int imgH, int posX, int posY)
{

    AndroidBitmapInfo info;
    void *pixels;
    int ret;
    fz_irect bbox;
    fz_rect rect;
    fz_pixmap *pix = NULL;
    fz_image *img = NULL;
    fz_point pos;
    fz_matrix matrix;

    image_struct *img_s = NULL;

    globals *glo = get_globals(env, thiz);
    fz_context *ctx = glo->ctx;
    pdf_document *doc = glo->doc;
    pdf_page *page = &glo->pages[glo->current];


    fz_var(pix);
    fz_var(img);
    fz_var(pos);

    LOGI("In native method\n");
    if ((ret = AndroidBitmap_getInfo(env, bitmap, &info)) < 0) {
        LOGE("AndroidBitmap_getInfo() failed ! error=%d", ret);
        return 0;
    }

    LOGI("Checking format\n");
    if (info.format != ANDROID_BITMAP_FORMAT_RGBA_8888) {
        LOGE("Bitmap format is not RGBA_8888 !");
        return 0;
    }

    LOGI("locking pixels\n");
    if ((ret = AndroidBitmap_lockPixels(env, bitmap, &pixels)) < 0) {
        LOGE("AndroidBitmap_lockPixels() failed ! error=%d", ret);
        return 0;
    }

    bbox.x0 = 0;
    bbox.y0 = 0;
    bbox.x1 = imgW;
    bbox.y1 = imgH;
    pix = fz_new_pixmap_with_bbox_and_data(ctx, glo->colorspace, &bbox, pixels);
    img = fz_new_image_from_pixmap(ctx, pix, NULL);

    pos.x = posX;
    pos.y = posY;

    fz_matrix ctm = fz_identity;
    float zoom = glo->resolution / 72;
    zoom = 1.0 / zoom;
    fz_scale(&ctm, zoom, zoom);

    fz_transform_point(&pos, &ctm);
    img_s->image = *img;
    img_s->pos = pos;
    matrix.a = imgW;
    matrix.d = imgH;
    matrix.e = posX;
    matrix.f = posY;
    img_s->matrix = matrix;
    img_s->doc = doc;


    pdf_clean_page_contents(doc, page, NULL, my_process_fn, &img_s);

}

static void my_process_fn(void *arg, fz_buffer *buffer, pdf_obj *res)
{
    image_struct *img_s = arg;
    fz_image *img = &img_s->image;
    fz_matrix *matrix = &img_s->matrix;
    pdf_document *doc = img_s->doc;
    fz_matrix ctm = fz_identity;
    fz_device *pdf_dev = NULL;

    fz_var(pdf_dev);

    pdf_dev = pdf_new_pdf_device(doc, NULL, res, &ctm, buffer);

    pdf_dev_fill_image(pdf_dev, img, matrix, 1);

    fz_free_device(pdf_dev);
}