code_app/app/scantool/dialog_scan.cpp

#include "dialog_scan.h"
#include "ui_dialog_scan.h"
#include <QCloseEvent>
#include <QMessageBox>
#include <QDateTime>
#include <QFileInfo>
#include "base/HGTime.h"
#include "base/HGUtility.h"
#include "imgproc/HGImgProc.h"
#include "imgproc/HGOCR.h"
#include "HGUIGlobal.h"

Dialog_Scan::Dialog_Scan(class MainWindow *mainWnd)
    : QDialog(nullptr)
    , ui(new Ui::Dialog_Scan)
    , m_mainWnd(mainWnd)
    , m_devHandle(nullptr)
    , m_scanning(false)
    , m_dpi(200)
    , m_scanFileName("")
    , m_scanImgFmtWriter(nullptr)
    , m_ocrMsgPump(nullptr)
    , m_ocrThread(nullptr)
{
    ui->setupUi(this);
    setWindowFlags(Qt::Dialog | Qt::WindowCloseButtonHint);

    connect(this, SIGNAL(deviceArrive(QString)), this, SLOT(on_deviceArrive(QString)));
    connect(this, SIGNAL(deviceRemove(QString)), this, SLOT(on_deviceRemove(QString)));
    connect(this, SIGNAL(keyPress(unsigned int)), this, SLOT(on_keyPress(unsigned int)));
    connect(this, SIGNAL(scanWorking()), this, SLOT(on_scanWorking()));
    connect(this, SIGNAL(scanInfo(QString, bool)), this, SLOT(on_scanInfo(QString, bool)));
    connect(this, SIGNAL(scanImage(unsigned int)), this, SLOT(on_scanImage(unsigned int)));
    connect(this, SIGNAL(scanFinish()), this, SLOT(on_scanFinish()));

    SANE_Int version_code = 0;
    sane_init_ex(&version_code, sane_ex_callback, this);
}

Dialog_Scan::~Dialog_Scan()
{
    if (NULL != m_devHandle)
    {
        StopScan();
        sane_close(m_devHandle);
        m_devHandle = NULL;
        m_devName.clear();
    }

    sane_exit();
    delete ui;
}

void Dialog_Scan::StartScan(unsigned int buttonId)
{
    if (nullptr == m_devHandle)
    {
        QMessageBox::information(this, tr("Tips"), tr("Device is offline"));
        return;
    }

    if (m_scanning)
    {
        return;
    }

    std::string deviceType = m_devName.toStdString();
    char v[256] = {0};
    SANE_Status status = sane_control_option(m_devHandle, (SANE_Int)0x886D, SANE_ACTION_GET_VALUE, v, NULL);
    if (SANE_STATUS_GOOD == status)
    {
        deviceType = v;
    }

    ScanParam scanParam;
    if (!m_mainWnd->GetScanParam(deviceType, buttonId, scanParam))
    {
        QMessageBox::information(this, tr("Tips"), tr("No key scanning configuration found"));
        return;
    }

    // 1.恢复默认

    SANE_Int num_dev_options = 0;
    sane_control_option(m_devHandle, 0, SANE_ACTION_GET_VALUE, &num_dev_options, NULL);
    for (int i = 1; i < num_dev_options; ++i)
    {
        const SANE_Option_Descriptor* desp = sane_get_option_descriptor(m_devHandle, i);
        if (NULL == desp)
            continue;

        const char* name = desp->name;
        while (' ' == *name)
            ++name;

        if (0 == strcmp(SANE_STD_OPT_NAME_RESTORE, name) && SANE_TYPE_BUTTON == desp->type)
        {
            sane_control_option(m_devHandle, i, SANE_ACTION_SET_VALUE, NULL, NULL);
            break;
        }
    }

    // 2.设置新的属性

    for (int i = 0; i < (int)scanParam.deviceConfigs.size(); ++i)
    {
        for (int j = 1; j < num_dev_options; ++j)
        {
            const SANE_Option_Descriptor* desp = sane_get_option_descriptor(m_devHandle, j);
            if (NULL == desp)
                continue;

            const char* name = desp->name;
            while (' ' == *name)
                ++name;

            if (0 == strcmp(scanParam.deviceConfigs[i].name.c_str(), name))
            {
                if (SANE_TYPE_STRING == desp->type)
                {
                    sane_control_option(m_devHandle, j, SANE_ACTION_SET_VALUE, (void*)scanParam.deviceConfigs[i].stringValue.c_str(), NULL);
                }
                else if (SANE_TYPE_INT == desp->type)
                {
                    SANE_Int value = scanParam.deviceConfigs[i].intValue;
                    sane_control_option(m_devHandle, j, SANE_ACTION_SET_VALUE, &value, NULL);
                }
                else if (SANE_TYPE_FIXED == desp->type)
                {
                    SANE_Fixed value = SANE_FIX(scanParam.deviceConfigs[i].doubleValue);
                    sane_control_option(m_devHandle, j, SANE_ACTION_SET_VALUE, &value, NULL);
                }
                else if (SANE_TYPE_BOOL == desp->type)
                {
                    SANE_Bool value = (SANE_Bool)scanParam.deviceConfigs[i].boolValue;
                    sane_control_option(m_devHandle, j, SANE_ACTION_SET_VALUE, &value, NULL);
                }

                break;
            }
        }
    }

    // 3. 获取DPI

    for (int i = 1; i < num_dev_options; ++i)
    {
        const SANE_Option_Descriptor* desp = sane_get_option_descriptor(m_devHandle, i);
        if (nullptr == desp)
            continue;

        if (SANE_TYPE_INT == desp->type)
        {
            SANE_Int value = 0;
            sane_control_option(m_devHandle, i, SANE_ACTION_GET_VALUE, &value, nullptr);
            if (0 == strcmp(desp->name, SANE_STD_OPT_NAME_RESOLUTION))
            {
                m_dpi = (HGUInt)value;
            }
        }
    }

    // 4.保存配置
    assert(m_scanFileName.isEmpty());
    assert(nullptr == m_scanImgFmtWriter);
    m_aquireIntoSaveParam = scanParam.saveParam;
    m_aquireIntoInBlank = true;
    m_aquireIntoBatchStartIndex = 0;
    m_aquireIntoPageIndex = 0;
    m_aquireIntoMultiPageCount = 0;

    QDateTime dateTime = QDateTime::currentDateTime();
    if (m_aquireIntoSaveParam.m_isUseSubfolderByTime)
    {
        m_aquireIntoSaveParam.m_savePath = getStdFileName(m_aquireIntoSaveParam.m_savePath + dateTime.toString("yyyy-MM-dd") + "/");
    }

    if (m_aquireIntoSaveParam.m_isOcr)
    {
        HGBase_CreateMsgPump(&m_ocrMsgPump);
        HGBase_OpenThread(ocrThreadFunc, this, &m_ocrThread);
    }

    m_scanning = true;
    ui->comboBox->setEnabled(false);
    ui->pushButtonScan->setEnabled(false);
    status = sane_start(m_devHandle);
    if (SANE_STATUS_GOOD != status)
    {
        if (NULL != m_ocrMsgPump)
        {
            HGBase_ExitMsgPump(m_ocrMsgPump);
            HGBase_CloseThread(m_ocrThread);
            m_ocrThread = NULL;
            HGBase_DestroyMsgPump(m_ocrMsgPump);
            m_ocrMsgPump = NULL;
        }

        m_scanning = false;
        m_dpi = 200;
        ui->comboBox->setEnabled(true);
        ui->pushButtonScan->setEnabled(true);
        return;
    }
}

void Dialog_Scan::StopScan()
{
    if (m_scanning)
    {
        assert(NULL != m_devHandle);
        sane_cancel(m_devHandle);
        m_scanning = false;
        m_dpi = 200;
        ui->comboBox->setEnabled(true);
        ui->pushButtonScan->setEnabled(true);
    }
}

void Dialog_Scan::SaveImage(HGImage image)
{
    if (m_aquireIntoSaveParam.m_isSaveAsMultiPage)
    {
        if (nullptr == m_scanImgFmtWriter)
        {
            assert(m_scanFileName.isEmpty());
            HGBase_CreateDir(getStdString(m_aquireIntoSaveParam.m_savePath).c_str());

            QString scanFileName;
            while (1)
            {
                scanFileName = m_aquireIntoSaveParam.m_savePath + m_aquireIntoSaveParam.m_fileNamePrefix + QString("%1.%2")
                    .arg(m_aquireIntoSaveParam.m_fileNameStartIndex, m_aquireIntoSaveParam.m_fileNameDigits, 10, QLatin1Char('0'))
                    .arg(m_aquireIntoSaveParam.m_fileNameExt);
                QFileInfo fileInfo(scanFileName);
                if (fileInfo.isFile())
                {
                    ++m_aquireIntoSaveParam.m_fileNameStartIndex;
                }
                else
                {
                    break;
                }
            }

            HGUInt fmtType = 0;
            if (nullptr != m_ocrMsgPump)
            {
                fmtType = HGIMGFMT_TYPE_TIFF;
            }

            HGImgFmt_OpenImageWriter(getStdString(getStdFileName(scanFileName)).c_str(), fmtType, &m_scanImgFmtWriter);
            if (nullptr != m_scanImgFmtWriter)
            {
                m_scanFileName = scanFileName;
            }
        }

        if (nullptr != m_scanImgFmtWriter)
        {
            HGImgFmtSaveInfo saveInfo;
            saveInfo.jpegQuality = (HGUInt)m_aquireIntoSaveParam.m_jpegQuality;
            saveInfo.tiffCompression = HGIMGFMT_TIFFCOMP_NONE;
            saveInfo.tiffJpegQuality = (HGUInt)m_aquireIntoSaveParam.m_tiffQuality;

            HGImageInfo imgInfo;
            HGBase_GetImageInfo(image, &imgInfo);
            if (HGBASE_IMGTYPE_BINARY == imgInfo.type)
            {
                if (1 == m_aquireIntoSaveParam.m_tiffCompressionBW)
                    saveInfo.tiffCompression = HGIMGFMT_TIFFCOMP_LZW;
                else if (2 == m_aquireIntoSaveParam.m_tiffCompressionBW)
                    saveInfo.tiffCompression = HGIMGFMT_TIFFCOMP_CCITTFAX4;
            }
            else
            {
                if (1 == m_aquireIntoSaveParam.m_tiffCompression)
                    saveInfo.tiffCompression = HGIMGFMT_TIFFCOMP_LZW;
                else if (2 == m_aquireIntoSaveParam.m_tiffCompression)
                    saveInfo.tiffCompression = HGIMGFMT_TIFFCOMP_JPEG;
            }

            if (nullptr != m_ocrMsgPump)
            {
                saveInfo.jpegQuality = 100;
                saveInfo.tiffCompression = HGIMGFMT_TIFFCOMP_NONE;
                saveInfo.tiffJpegQuality = 100;
            }

            if (HGBASE_ERR_OK == HGImgFmt_SaveImageToWriter(m_scanImgFmtWriter, image, &saveInfo))
            {
                ++m_aquireIntoMultiPageCount;
                if (1 == m_aquireIntoSaveParam.m_multiPagesType && m_aquireIntoMultiPageCount == m_aquireIntoSaveParam.m_customMultiPages)
                {
                    HGImgFmt_CloseImageWriter(m_scanImgFmtWriter);
                    m_scanImgFmtWriter = nullptr;

                    if (nullptr != m_ocrMsgPump)
                    {
                        QString *filePath = new QString(m_scanFileName);
                        HGMsg msg;
                        msg.id = 1;
                        msg.data = filePath;
                        if (HGBASE_ERR_OK != HGBase_PostPumpMessage(m_ocrMsgPump, &msg))
                        {
                            delete filePath;
                        }
                    }

                    m_scanFileName.clear();
                    ++m_aquireIntoSaveParam.m_fileNameStartIndex;
                    m_aquireIntoMultiPageCount = 0;
                }
            }
        }
    }
    else
    {
        assert(nullptr == m_scanImgFmtWriter);

        QString savePath = m_aquireIntoSaveParam.m_savePath;
        if (m_aquireIntoSaveParam.m_isUseSubfolderByBlankPages)
        {
            HGBool isBlank = HGFALSE;
            HGImgProc_ImageBlankCheck(image, nullptr, &isBlank);
            if (isBlank)
            {
                m_aquireIntoInBlank = true;
            }
            else
            {
                if (m_aquireIntoInBlank)
                {
                    ++m_aquireIntoBatchStartIndex;
                }

                m_aquireIntoInBlank = false;
            }

            char batchDir[20];
            sprintf(batchDir, "batch%d", m_aquireIntoBatchStartIndex);
            savePath = getStdFileName(savePath + batchDir + "/");
        }

        if (m_aquireIntoSaveParam.m_isUseSubfolderByColor)
        {
            QString colorModeName;
            HGImageInfo imgInfo;
            HGBase_GetImageInfo(image, &imgInfo);
            if (HGBASE_IMGTYPE_BINARY == imgInfo.type)
                colorModeName = tr("binary");
            else if (HGBASE_IMGTYPE_GRAY == imgInfo.type)
                colorModeName = tr("gray");
            else
                colorModeName = tr("rgb");

            savePath = getStdFileName(savePath + colorModeName + "/");
        }

        HGBase_CreateDir(getStdString(savePath).c_str());

        while (1)
        {
            m_scanFileName = savePath + m_aquireIntoSaveParam.m_fileNamePrefix + QString("%1.%2")
                .arg(m_aquireIntoSaveParam.m_fileNameStartIndex, m_aquireIntoSaveParam.m_fileNameDigits, 10, QLatin1Char('0'))
                .arg(m_aquireIntoSaveParam.m_fileNameExt);
            QFileInfo fileInfo(m_scanFileName);
            if (fileInfo.isFile())
            {
                ++m_aquireIntoSaveParam.m_fileNameStartIndex;
            }
            else
            {
                break;
            }
        }

        HGImgFmtSaveInfo saveInfo;
        saveInfo.jpegQuality = (HGUInt)m_aquireIntoSaveParam.m_jpegQuality;
        saveInfo.tiffCompression = HGIMGFMT_TIFFCOMP_NONE;
        saveInfo.tiffJpegQuality = (HGUInt)m_aquireIntoSaveParam.m_tiffQuality;

        HGImageInfo imgInfo;
        HGBase_GetImageInfo(image, &imgInfo);
        if (HGBASE_IMGTYPE_BINARY == imgInfo.type)
        {
            if (1 == m_aquireIntoSaveParam.m_tiffCompressionBW)
                saveInfo.tiffCompression = HGIMGFMT_TIFFCOMP_LZW;
            else if (2 == m_aquireIntoSaveParam.m_tiffCompressionBW)
                saveInfo.tiffCompression = HGIMGFMT_TIFFCOMP_CCITTFAX4;
        }
        else
        {
            if (1 == m_aquireIntoSaveParam.m_tiffCompression)
                saveInfo.tiffCompression = HGIMGFMT_TIFFCOMP_LZW;
            else if (2 == m_aquireIntoSaveParam.m_tiffCompression)
                saveInfo.tiffCompression = HGIMGFMT_TIFFCOMP_JPEG;
        }

        HGUInt fmtType = 0;
        if (nullptr != m_ocrMsgPump)
        {
            fmtType = HGIMGFMT_TYPE_TIFF;
            saveInfo.jpegQuality = 100;
            saveInfo.tiffCompression = HGIMGFMT_TIFFCOMP_NONE;
            saveInfo.tiffJpegQuality = 100;
        }

        if (HGBASE_ERR_OK == HGImgFmt_SaveImage(image, fmtType, &saveInfo, getStdString(m_scanFileName).c_str()))
        {
            if (nullptr != m_ocrMsgPump)
            {
                QString *filePath = new QString(m_scanFileName);
                HGMsg msg;
                msg.id = 1;
                msg.data = filePath;
                if (HGBASE_ERR_OK != HGBase_PostPumpMessage(m_ocrMsgPump, &msg))
                {
                    delete filePath;
                }
            }

            ++m_aquireIntoSaveParam.m_fileNameStartIndex;
        }

        m_scanFileName.clear();
    }
}

int Dialog_Scan::sane_ex_callback(SANE_Handle hdev, int code, void* data, unsigned int* len, void* param)
{
    (void)hdev;
    (void)len;

    Dialog_Scan* p = (Dialog_Scan*)param;
    switch (code)
    {
    case SANE_EVENT_DEVICE_ARRIVED:
        {
            SANE_Device* sane_dev = (SANE_Device*)data;
            emit p->deviceArrive(sane_dev->name);
        }
        break;
    case SANE_EVENT_DEVICE_LEFT:
        {
            SANE_Device* sane_dev = (SANE_Device*)data;
            emit p->deviceRemove(sane_dev->name);
        }
    break;
    case SANE_EVENT_WORKING:
        {
            emit p->scanWorking();
            emit p->scanInfo((const char*)data, false);
        }
        break;
    case SANE_EVENT_SCAN_FINISHED:
        {
            emit p->scanInfo((const char*)data, (0 != *len));
            emit p->scanFinish();
        }
        break;
    case SANE_EVENT_STATUS:
        {
            emit p->scanInfo((const char*)data, false);
        }
        break;
    case SANE_EVENT_ERROR:
        {
            emit p->scanInfo((const char*)data, (0 != *len));
        }
        break;
    case SANE_EVENT_IMAGE_OK:
        {
            ++p->m_aquireIntoPageIndex;
            emit p->scanImage(p->m_aquireIntoPageIndex);

            if ((1 == p->m_aquireIntoSaveParam.m_fileNameOddEventType && 1 != p->m_aquireIntoPageIndex % 2)
                || (2 == p->m_aquireIntoSaveParam.m_fileNameOddEventType && 0 != p->m_aquireIntoPageIndex % 2))
            {
                // 跳过
            }
            else
            {
                SANE_Image* sane_img = (SANE_Image*)data;

                HGUInt imgType = 0;
                if (sane_img->header.format == SANE_FRAME_GRAY)
                {
                    if (1 == sane_img->header.depth)
                        imgType = HGBASE_IMGTYPE_BINARY;
                    else if (8 == sane_img->header.depth)
                        imgType = HGBASE_IMGTYPE_GRAY;
                }
                else if (sane_img->header.format == SANE_FRAME_RGB)
                    imgType = HGBASE_IMGTYPE_RGB;

                HGByte* data = sane_img->data;
                HGImageInfo imgInfo = { (HGUInt)sane_img->header.pixels_per_line, (HGUInt)sane_img->header.lines,
                                       imgType, (HGUInt)sane_img->header.bytes_per_line, HGBASE_IMGORIGIN_TOP };

                HGImage img = NULL;
                HGBase_CreateImageFromData(data, &imgInfo, NULL, 0, HGBASE_IMGORIGIN_TOP, &img);
                if (NULL != img)
                {
                    HGBase_SetImageDpi(img, p->m_dpi, p->m_dpi);
                    p->SaveImage(img);
                    HGBase_DestroyImage(img);
                }
            }
        }
        break;
    }

    return 0;
}

void Dialog_Scan::ocrThreadFunc(HGThread thread, HGPointer param)
{
    Dialog_Scan *p = (Dialog_Scan*)param;
    HGBase_RunMsgPump(p->m_ocrMsgPump, ocrMsgPumpFunc, param);
}

void Dialog_Scan::ocrMsgPumpFunc(HGMsgPump msgPump, const HGMsg *msg, HGPointer param)
{
    Dialog_Scan *p = (Dialog_Scan*)param;
    if (msg->id == 1)
    {
        QString *filePath = (QString *)msg->data;

        HGOCRMgr ocrMgr = NULL;
        HGImgProc_CreateOCRMgr(HGIMGPROC_OCRALGO_DEFAULT, &ocrMgr);
        if (NULL != ocrMgr)
        {
            HGImgFmtReader reader = NULL;
            HGImgFmt_OpenImageReader(filePath->toLocal8Bit().toStdString().c_str(), 0, &reader);
            if (NULL != reader)
            {
                HGUInt count = 0;
                HGImgFmt_GetImagePageCount(reader, &count);
                for (HGUInt i = 0; i < count; ++i)
                {
                    HGImage image = NULL;
                    HGImgFmt_LoadImageFromReader(reader, i, NULL, 0, 0, &image);
                    if (NULL != image)
                    {
                        HGImgProc_AddToImageOCRList(ocrMgr, image);
                        HGBase_DestroyImage(image);
                    }
                }

                HGImgFmt_CloseImageReader(reader);
            }

            //HGBase_DeleteFile(filePath->toLocal8Bit().toStdString().c_str());
            HGImgProc_ImageListOCRToFile(ocrMgr, 0, filePath->toLocal8Bit().toStdString().c_str(), NULL, NULL);

            HGImgProc_DestroyOCRMgr(ocrMgr);
        }

        delete filePath;
    }
}

void Dialog_Scan::closeEvent(QCloseEvent *e)
{
    hide(); // 隐藏主窗口
    e->ignore(); //忽略关闭事件，这样才不会关闭程序
}

void Dialog_Scan::on_deviceArrive(QString devName)
{
    ui->comboBox->addItem(devName);
    if (nullptr == m_devHandle)
    {
        SANE_Status status = sane_open(devName.toStdString().c_str(), &m_devHandle);
        if (SANE_STATUS_GOOD == status)
        {
            m_devName = devName;
        }
    }
}

void Dialog_Scan::on_deviceRemove(QString devName)
{
    if (devName == m_devName)
    {
        StopScan();
        sane_close(m_devHandle);
        m_devHandle = NULL;
        m_devName.clear();
    }

    for (int i = 0; i < ui->comboBox->count(); ++i)
    {
        if (ui->comboBox->itemText(i) == devName)
        {
            ui->comboBox->removeItem(i);
            break;
        }
    }
}

void Dialog_Scan::on_keyPress(unsigned int buttonId)
{
    assert(NULL != m_devHandle);
    StartScan(buttonId);
}

void Dialog_Scan::on_scanWorking()
{
    // TODO 显示扫描进度窗口
}

void Dialog_Scan::on_scanInfo(QString info, bool error)
{
    // TODO 更新扫描信息到进度窗口
}

void Dialog_Scan::on_scanImage(unsigned int count)
{
    // TODO 更新扫描数量到进度窗口
}

void Dialog_Scan::on_scanFinish()
{
    if (nullptr != m_scanImgFmtWriter)
    {
        HGImgFmt_CloseImageWriter(m_scanImgFmtWriter);
        m_scanImgFmtWriter = nullptr;

        if (nullptr != m_ocrMsgPump)
        {
            QString *filePath = new QString(m_scanFileName);
            HGMsg msg;
            msg.id = 1;
            msg.data = filePath;
            if (HGBASE_ERR_OK != HGBase_PostPumpMessage(m_ocrMsgPump, &msg))
            {
                delete filePath;
            }
        }

        m_scanFileName.clear();
        ++m_aquireIntoSaveParam.m_fileNameStartIndex;
        m_aquireIntoMultiPageCount = 0;
    }

    if (NULL != m_ocrMsgPump)
    {
        HGBase_ExitMsgPump(m_ocrMsgPump);
        HGBase_CloseThread(m_ocrThread);
        m_ocrThread = NULL;
        HGBase_DestroyMsgPump(m_ocrMsgPump);
        m_ocrMsgPump = NULL;
    }

    // TODO 隐藏扫描进度窗口

    StopScan();
}

void Dialog_Scan::on_comboBox_currentIndexChanged(const QString &arg1)
{
    if (NULL != m_devHandle)
    {
        StopScan();
        sane_close(m_devHandle);
        m_devHandle = NULL;
        m_devName.clear();
    }

    SANE_Status status = sane_open(arg1.toStdString().c_str(), &m_devHandle);
    if (SANE_STATUS_GOOD == status)
    {
        m_devName = arg1;
    }
}

void Dialog_Scan::on_pushButtonScan_clicked()
{
    assert(!m_scanning);
    StartScan(0);
}