ukui-search/libsearch/index/ocrobject.cpp

/*
 *
 * Copyright (C) 2023, KylinSoft Co., Ltd.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 *
 */
#include "ocrobject.h"

OcrObject *OcrObject::m_instance = nullptr;
once_flag g_instanceFlag;

OcrObject *OcrObject::getInstance()
{
    std::call_once(g_instanceFlag, [] () {
        m_instance = new OcrObject;
    });
    return m_instance;
}

void OcrObject::getTxtContent(const QString &path, QString &textcontent)
{
//    m_api = new tesseract::TessBaseAPI();
//    if (m_api->Init(NULL, "chi_sim")) {
//        qDebug() << "Could not initialize tesseract.\n";
//        return;
//    }
//    m_api->SetVariable("user_defined_dpi", "1080");//图片中未标明分辨率的默认设置为1080

//    Pix *image = pixRead(path.toStdString().data());
//    if (!image) {
//        qDebug() << "path:" << path <<" pixRead error!";
//        if (m_api) {
//            m_api->End();
//            delete m_api;
//            m_api = nullptr;
//        }
//        return;
//    }
//    m_api->SetImage(image);
//    textcontent = m_api->GetUTF8Text();
//    qDebug() << "path:" << path << " Text:" << textcontent;
//    pixDestroy(&image);
//    m_api->Clear();

//    if (m_api) {
//        m_api->End();
//        delete m_api;
//        m_api = nullptr;
//    }

//多进程版本
    //qDebug() << "path:" << path;
    tesseract::TessBaseAPI  *api = new tesseract::TessBaseAPI();
    if (api->Init(NULL, "chi_sim")) {
        qDebug() << "Could not initialize tesseract.\n";
        return;
    }
    api->SetVariable("user_defined_dpi", "1080");//图片中未标明分辨率的默认设置为1080

    Pix *image = pixRead(path.toStdString().data());
    if (!image) {
//        qDebug() << "path:" << path <<" pixRead error!";
        if (api) {
            api->End();
            delete api;
            api = nullptr;
        }
        return;
    }
    api->SetImage(image);
    char *tmp = api->GetUTF8Text();
    textcontent = QString::fromLocal8Bit(tmp);
    delete [] tmp;
    //qDebug() << " Text:" << textcontent;
    pixDestroy(&image);
    api->Clear();

    if (api) {
        api->End();
        delete api;
        api = nullptr;
    }
}

OcrObject::OcrObject(QObject *parent) : QObject(parent)
{
//    init();
}

OcrObject::~OcrObject()
{
//    if (m_api) {
//        m_api->End();
//        delete m_api;
//        m_api = nullptr;
//    }
}

void OcrObject::init()
{
    m_api = new tesseract::TessBaseAPI();
    if (m_api->Init(NULL, "chi_sim")) {
        qDebug() << "Could not initialize tesseract.\n";
        return;
    }
    m_api->SetVariable("user_defined_dpi", "1080");//图片中未标明分辨率的默认设置为1080
}