C++ DImg::convertToPixmap方法代码示例

void ImagePreviewItem::paint(QPainter* painter, const QStyleOptionGraphicsItem* option, QWidget* widget)
{
    Q_D(GraphicsDImgItem);

    QRect   drawRect     = option->exposedRect.intersected(boundingRect()).toAlignedRect();
    QRect   pixSourceRect;
    QPixmap pix;
    QSize   completeSize = boundingRect().size().toSize();

    /* For high resolution ("retina") displays, Mac OS X / Qt
       report only half of the physical resolution in terms of
       pixels, i.e. every logical pixels corresponds to 2x2
       physical pixels. However, UI elements and fonts are
       nevertheless rendered at full resolution, and pixmaps
       as well, provided their resolution is high enough (that
       is, higher than the reported, logical resolution).

       To work around this, we render the photos not a logical
       resolution, but with the photo's full resolution, but
       at the screen's aspect ratio. When we later draw this
       high resolution bitmap, it is up to Qt to scale the
       photo to the true physical resolution.  The ratio
       computed below is the ratio between the photo and
       screen resolutions, or equivalently the factor by which
       we need to increase the pixel size of the rendered
       pixmap.
    */
#ifdef USE_QT_SCALING
    double xratio = double(d->image.width()) / completeSize.width();
    double yratio = double(d->image.height()) / completeSize.height();
    double ratio = qMax(qMin(xratio, yratio), 1.0);
#else
    double ratio = 1.0;
#endif

    QRect  scaledDrawRect = QRectF(ratio*drawRect.x(), ratio*drawRect.y(),
                                   ratio*drawRect.width(), ratio*drawRect.height()).toRect();

    // scale "as if" scaling to whole image, but clip output to our exposed region
    QSize scaledCompleteSize = QSizeF(ratio*completeSize.width(), ratio*completeSize.height()).toSize();
    DImg scaledImage   = d->image.smoothScaleClipped(scaledCompleteSize.width(), scaledCompleteSize.height(),
                                                     scaledDrawRect.x(), scaledDrawRect.y(),
                                                     scaledDrawRect.width(), scaledDrawRect.height());

    if (d->cachedPixmaps.find(scaledDrawRect, &pix, &pixSourceRect))
    {
        if (pixSourceRect.isNull())
        {
            painter->drawPixmap(drawRect, pix);
        }
        else
        {
            painter->drawPixmap(drawRect, pix, pixSourceRect);
        }
    }
    else
    {
        // TODO: factoring ICC settings code using ImageIface/EditorCore methods.

        // Apply CM settings.

        bool doSoftProofing              = EditorCore::defaultInstance()->softProofingEnabled();
        ICCSettingsContainer iccSettings = EditorCore::defaultInstance()->getICCSettings();

        if (iccSettings.enableCM && (iccSettings.useManagedView || doSoftProofing))
        {
            IccManager   manager(scaledImage);
            IccTransform monitorICCtrans;

            if (doSoftProofing)
            {
                monitorICCtrans = manager.displaySoftProofingTransform(iccSettings.defaultProofProfile, widget);
            }
            else
            {
                monitorICCtrans = manager.displayTransform(widget);
            }

            pix = scaledImage.convertToPixmap(monitorICCtrans);
        }
        else
        {
            pix = scaledImage.convertToPixmap();
        }

        d->cachedPixmaps.insert(scaledDrawRect, pix);

        painter->drawPixmap(drawRect, pix);
    }

    // Show the Over/Under exposure pixels indicators

    ExposureSettingsContainer* const expoSettings = EditorCore::defaultInstance()->getExposureSettings();

    if (expoSettings)
    {
        if (expoSettings->underExposureIndicator || expoSettings->overExposureIndicator)
        {
            QImage pureColorMask = scaledImage.pureColorMask(expoSettings);
            QPixmap pixMask      = QPixmap::fromImage(pureColorMask);
//.........这里部分代码省略.........

//.........这里部分代码省略.........
        DColor transparent(backgroundColor);
        transparent.setAlpha(d->transparency);

        if (image->sixteenBit())
        {
            transparent.convertToSixteenBit();
        }

        transparentLayer.fill(transparent);
        textArea.bitBlendImage(composer, &transparentLayer, 0, 0, transparentLayer.width(), transparentLayer.height(),
                               textAreaBackgroundRect.x(), textAreaBackgroundRect.y());
    }

    DImg textNotDrawn;

    if (textArea.sixteenBit())
    {
        textNotDrawn = textArea.copy();
        textNotDrawn.convertToEightBit();
    }
    else
    {
        textNotDrawn = textArea;
    }

    // We have no direct pixel access to font rendering, so now we need to use Qt/X11 for the drawing

    // convert text area to pixmap
    QPixmap pixmap;

    if (destPainter)
    {
        // We working on tool preview, deal with CM as well
        pixmap = d->iface->convertToPixmap(textNotDrawn);
    }
    else
    {
        // We working on target image. Do no apply double CM adjustment here.
        pixmap = textNotDrawn.convertToPixmap();
    }

    int fontScaleWidth  = qRound(fontWidth  / fontScale);
    int fontScaleHeight = qRound(fontHeight / fontScale);

    QPixmap textPixmap(fontScaleWidth, fontScaleHeight);
    textPixmap.fill(Qt::transparent);

    QPainter tp(&textPixmap);
    tp.setOpacity((qreal)textOpacity / 100.0);
    tp.setPen(QPen(textColor, 1));
    tp.setFont(font);

    switch (textRotation)
    {
        case ROTATION_NONE:
            tp.drawText(0, 0, fontScaleWidth, fontScaleHeight,
                         alignMode, textString);
            break;
        case ROTATION_90:
            tp.translate(fontScaleWidth, 0);
            tp.rotate(90.0);
            tp.drawText(0, 0, fontScaleHeight, fontScaleWidth,
                        alignMode, textString);
            break;
        case ROTATION_180:
            tp.translate(fontScaleWidth, fontScaleHeight);

void ImageRegionItem::paint(QPainter* painter, const QStyleOptionGraphicsItem* option, QWidget* widget)
{
    Q_D(GraphicsDImgItem);

    d_ptr->drawRect      = option->exposedRect.intersected(boundingRect()).toAlignedRect();
    QRect   pixSourceRect;
    QPixmap pix;
    QSize   completeSize = boundingRect().size().toSize();

    // scale "as if" scaling to whole image, but clip output to our exposed region
    DImg scaledImage     = d->image.smoothScaleClipped(completeSize.width(),    completeSize.height(),
                           d_ptr->drawRect.x(),     d_ptr->drawRect.y(),
                           d_ptr->drawRect.width(), d_ptr->drawRect.height());

    if (d->cachedPixmaps.find(d_ptr->drawRect, &pix, &pixSourceRect))
    {
        if (pixSourceRect.isNull())
        {
            painter->drawPixmap(d_ptr->drawRect.topLeft(), pix);
        }
        else
        {
            painter->drawPixmap(d_ptr->drawRect.topLeft(), pix, pixSourceRect);
        }
    }
    else
    {
        // TODO: factoring ICC settings code using ImageIface/EditorCore methods.

        // Apply CM settings.

        bool doSoftProofing              = EditorCore::defaultInstance()->softProofingEnabled();
        ICCSettingsContainer iccSettings = EditorCore::defaultInstance()->getICCSettings();

        if (iccSettings.enableCM && (iccSettings.useManagedView || doSoftProofing))
        {
            IccManager   manager(scaledImage);
            IccTransform monitorICCtrans;

            if (doSoftProofing)
            {
                monitorICCtrans = manager.displaySoftProofingTransform(iccSettings.defaultProofProfile, widget);
            }
            else
            {
                monitorICCtrans = manager.displayTransform(widget);
            }

            pix = scaledImage.convertToPixmap(monitorICCtrans);
        }
        else
        {
            pix = scaledImage.convertToPixmap();
        }

        d->cachedPixmaps.insert(d_ptr->drawRect, pix);

        painter->drawPixmap(d_ptr->drawRect.topLeft(), pix);
    }

    paintExtraData(painter);

    // Show the Over/Under exposure pixels indicators

    ExposureSettingsContainer* const expoSettings = EditorCore::defaultInstance()->getExposureSettings();

    if (expoSettings)
    {
        if (expoSettings->underExposureIndicator || expoSettings->overExposureIndicator)
        {
            QImage pureColorMask = scaledImage.pureColorMask(expoSettings);
            QPixmap pixMask      = QPixmap::fromImage(pureColorMask);
            painter->drawPixmap(d_ptr->drawRect.topLeft(), pixMask);
        }
    }
}

QLayout* ColorCorrectionDlg::createPreviews() const
{
    QGridLayout* const grid     = new QGridLayout;
    QLabel* const originalTitle = new QLabel;

    if (d->mode == ProfileMismatch)
    {
        originalTitle->setText(i18n("Original Colors:"));
    }
    else if (d->mode == MissingProfile)
    {
        originalTitle->setText(i18n("Uncorrected Colors:"));
    }
    else if (d->mode == UncalibratedColor)
    {
        originalTitle->setText(i18n("Raw Colors:"));
    }

    originalTitle->setWordWrap(true);

    QLabel* const previewOriginal = new QLabel;
    DImg copyOriginal             = d->preview.copy();
    IccManager manager(copyOriginal);
    manager.transformForDisplay();
    previewOriginal->setPixmap(copyOriginal.convertToPixmap());

    QLabel* const targetTitle = new QLabel;

    if (d->mode == ProfileMismatch)
    {
        targetTitle->setText(i18n("Resulting Colors:"));
    }
    else if (d->mode == MissingProfile)
    {
        targetTitle->setText(i18n("Correction Applied:"));
    }
    else if (d->mode == UncalibratedColor)
    {
        targetTitle->setText(i18n("Corrected Colors:"));
    }

    targetTitle->setWordWrap(true);

    d->previewTarget = new QLabel;

    if (d->preview.width() > d->preview.height())
    {
        grid->addWidget(originalTitle,    0, 0, Qt::AlignTop);
        grid->addWidget(previewOriginal,  1, 0);
        grid->addWidget(targetTitle,      2, 0, Qt::AlignTop);
        grid->addWidget(d->previewTarget, 3, 0);
    }
    else
    {
        grid->addWidget(originalTitle,    0, 0, Qt::AlignTop);
        grid->addWidget(previewOriginal,  1, 0);
        grid->addWidget(targetTitle,      0, 1, Qt::AlignTop);
        grid->addWidget(d->previewTarget, 1, 1);
    }

    return grid;
}