Ejemplo n.º 1
0
void LensAutoFixTool::preparePreview()
{
    // Settings information must be get before to disable settings view.
    LensFunContainer settings = d->cameraSelector->settings();
    d->settingsView->assignFilterSettings(settings);
    ImageIface* const iface   = d->previewWidget->imageIface();
    DImg preview              = iface->preview();

    if (d->showGrid->isChecked())
    {
        QBitmap pattern(9, 9);
        pattern.clear();
        QPainter p1(&pattern);
        p1.setPen(QPen(Qt::black, 1));
        p1.drawLine(5, 0, 5, 9);
        p1.drawLine(0, 5, 9, 5);
        p1.end();

        QPixmap pix(preview.size());
        pix.fill(Qt::transparent);
        QPainter p2(&pix);
        p2.setPen(QPen(Qt::gray, 1));
        p2.fillRect(0, 0, pix.width(), pix.height(), QBrush(pattern));
        p2.end();
        DImg grid(pix.toImage());

        DColorComposer* const composer            = DColorComposer::getComposer(DColorComposer::PorterDuffNone);
        DColorComposer::MultiplicationFlags flags = DColorComposer::NoMultiplication;

        // Do alpha blending of template on dest image
        preview.bitBlendImage(composer, &grid, 0, 0, preview.width(), preview.height(), 0, 0, flags);
    }

    setFilter(new LensFunFilter(&preview, this, settings));
}
Ejemplo n.º 2
0
/**
   Take data from image, draw text at x|y with specified parameters.
   If destPainter is null, draw to image,
   if destPainter is not null, draw directly using the painter.
   Returns modified area of image.
*/
QRect InsertTextWidget::composeImage(DImg* const image, QPainter* const destPainter,
                                     int x, int y,
                                     QFont font, float pointSize, int textRotation, QColor textColor,
                                     int textOpacity, int alignMode, const QString& textString,
                                     bool transparentBackground, QColor backgroundColor,
                                     BorderMode borderMode, int borderWidth, int spacing, float fontScale)
{
    /*
        The problem we have to solve is that we have no pixel access to font rendering,
        we have to let Qt do the drawing. On the other hand we need to support 16 bit, which
        cannot be done with QPixmap.
        The current solution cuts out the text area, lets Qt do its drawing, converts back and blits to original.
    */

    int maxWidth, maxHeight;

    if (x == -1 && y == -1)
    {
        maxWidth  = image->width();
        maxHeight = image->height();
    }
    else
    {
        maxWidth  = image->width()  - x;
        maxHeight = image->height() - y;
    }

    fontScale = qMax(0.01f, fontScale);

    // find out size of the area that we are drawing to
    font.setPointSizeF(pointSize);
    QFontMetrics fontMt(font);
    QRect fontRect = fontMt.boundingRect(0, 0,
                                         qRound(maxWidth  / fontScale),
                                         qRound(maxHeight / fontScale),
                                         alignMode, textString);

    fontRect.setWidth(qRound(fontRect.width()   * fontScale));
    fontRect.setHeight(qRound(fontRect.height() * fontScale));

    if (!fontRect.isValid())
    {
        return QRect();
    }

    int fontWidth, fontHeight;

    switch (textRotation)
    {
        case ROTATION_NONE:
        case ROTATION_180:
        default:
            fontWidth = fontRect.width();
            fontHeight = fontRect.height();
            break;

        case ROTATION_90:
        case ROTATION_270:
            fontWidth = fontRect.height();
            fontHeight = fontRect.width();
            break;
    }

    // x, y == -1 means that we have to find a good initial position for the text here
    if (x == -1 && y == -1)
    {
        int boxWidth  = fontWidth  + 2 * borderWidth + 2 * spacing;
        int boxHeight = fontHeight + 2 * borderWidth + 2 * spacing;

        // was a valid position hint stored from last use?
        if (d->positionHint.isValid())
        {
            // We assume that people tend to orient text along the edges,
            // so we do some guessing so that positions such as "in the lower right corner"
            // will be remembered across different image sizes.

            // get relative positions
            float fromTop    =       (float)d->positionHint.top()    / 10000.0;
            float fromBottom = 1.0 - (float)d->positionHint.bottom() / 10000.0;
            float fromLeft   =       (float)d->positionHint.left()   / 10000.0;
            float fromRight  = 1.0 - (float)d->positionHint.right()  / 10000.0;

            // calculate horizontal position
            if (fromLeft < fromRight)
            {
                x = qRound(fromLeft * maxWidth);

                // we are placing from the smaller distance,
                // so if now the larger distance is actually too small,
                // fall back to standard placement, nothing to lose.
                if (x + boxWidth > maxWidth)
                {
                    x = qMax( (maxWidth - boxWidth) / 2, 0);
                }
            }
            else
            {
                x = maxWidth - qRound(fromRight * maxWidth) - boxWidth;

                if ( x < 0 )
                {
                    x = qMax( (maxWidth - boxWidth) / 2, 0);
                }
            }

            // calculate vertical position
            if (fromTop < fromBottom)
            {
                y = qRound(fromTop * maxHeight);

                if (y + boxHeight > maxHeight)
                {
                    y = qMax( (maxHeight - boxHeight) / 2, 0);
                }
            }
            else
            {
                y = maxHeight - qRound(fromBottom * maxHeight) - boxHeight;

                if ( y < 0 )
                {
                    y = qMax( (maxHeight - boxHeight) / 2, 0);
                }
            }

            if (! QRect(x, y, boxWidth, boxHeight).
                intersects(QRect(0, 0, maxWidth, maxHeight)) )
            {
                // emergency fallback - nothing is visible
                x = qMax( (maxWidth - boxWidth)   / 2, 0);
                y = qMax( (maxHeight - boxHeight) / 2, 0);
            }

            // invalidate position hint, use only once
            d->positionHint = QRect();
        }
        else
        {
            // use standard position
            x = qMax( (maxWidth - boxWidth)   / 2, 0);
            y = qMax( (maxHeight - boxHeight) / 2, 0);
        }
    }

    // create a rectangle relative to image
    QRect drawRect( x, y, fontWidth + 2 * borderWidth + 2 * spacing, fontHeight + 2 * borderWidth  + 2 * spacing);

    // create a rectangle relative to textArea, excluding the border
    QRect textAreaBackgroundRect( borderWidth, borderWidth, fontWidth + 2 * spacing, fontHeight + 2 * spacing);

    // create a rectangle relative to textArea, excluding the border and spacing
    QRect textAreaTextRect( borderWidth + spacing, borderWidth + spacing, fontWidth, fontHeight );

    // create a rectangle relative to textArea, including the border,
    // for drawing the rectangle, taking into account that the width of the QPen goes in and out in equal parts
    QRect textAreaDrawRect( borderWidth / 2, borderWidth / 2, fontWidth + borderWidth + 2 * spacing,
                            fontHeight + borderWidth + 2 * spacing );

    // cut out the text area
    DImg textArea = image->copy(drawRect);

    if (textArea.isNull())
    {
        return QRect();
    }

    // compose semi-transparent background over textArea
    DColorComposer* composer = DColorComposer::getComposer(DColorComposer::PorterDuffNone);

    if (transparentBackground)
    {
        DImg transparentLayer(textAreaBackgroundRect.width(), textAreaBackgroundRect.height(), textArea.sixteenBit(), true);
        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);
            tp.rotate(180.0);
            tp.drawText(0, 0, fontScaleWidth, fontScaleHeight,
                        alignMode, textString);
            break;
        case ROTATION_270:
            tp.translate(0, fontScaleHeight);
            tp.rotate(270.0);
            tp.drawText(0, 0, fontScaleHeight, fontScaleWidth,
                        alignMode, textString);
            break;
    }

    tp.end();

    // paint on pixmap
    QPainter p(&pixmap);

    p.drawPixmap(textAreaTextRect, textPixmap.scaled(fontWidth,
                                                     fontHeight,
                                                     Qt::IgnoreAspectRatio,
                                                     Qt::SmoothTransformation));
    // Drawing rectangle around text.

    if (borderMode == BORDER_NORMAL)      // Decorative border using text color.
    {
        p.setPen( QPen(textColor, borderWidth, Qt::SolidLine,
                       Qt::SquareCap, Qt::RoundJoin) ) ;
        p.drawRect(textAreaDrawRect);
    }
    else if (borderMode == BORDER_SUPPORT)  // Make simple dot line border to help user.
    {
        p.setPen(QPen(Qt::white, 1, Qt::SolidLine));
        p.drawRect(textAreaDrawRect);
        p.setPen(QPen(Qt::red, 1, Qt::DotLine));
        p.drawRect(textAreaDrawRect);
    }

    p.end();

    if (!destPainter)
    {
        // convert to QImage, then to DImg
        QImage pixmapImage = pixmap.toImage();
        DImg textDrawn(pixmapImage.width(), pixmapImage.height(), false, true, pixmapImage.bits());

        // This does not work: during the conversion, colors are altered significantly (diffs of 1 to 10 in each component),
        // so we cannot find out which pixels have actually been touched.
/*
        // Compare the result of drawing with the previous version.
        // Set all unchanged pixels to transparent
        DColor color, ncolor;
        uchar *ptr, *nptr;
        ptr = textDrawn.bits();
        nptr = textNotDrawn.bits();
        int bytesDepth = textDrawn.bytesDepth();
        int numPixels = textDrawn.width() * textDrawn.height();
        for (int i = 0; i < numPixels; ++i, ptr+= bytesDepth, nptr += bytesDepth)
        {
            color.setColor(ptr, false);
            ncolor.setColor(nptr, false);
            if ( color.red()   == ncolor.red() &&
                color.green() == ncolor.green() &&
                color.blue()  == ncolor.blue())
            {
                color.setAlpha(0);
                color.setPixel(ptr);
            }
        }
        // convert to 16 bit if needed
*/
        textDrawn.convertToDepthOfImage(&textArea);

        // now compose to original: only pixels affected by drawing text and border are changed, not whole area
        textArea.bitBlendImage(composer, &textDrawn, 0, 0, textDrawn.width(), textDrawn.height(), 0, 0);

        // copy result to original image
        image->bitBltImage(&textArea, drawRect.x(), drawRect.y());
    }
    else
    {
        destPainter->drawPixmap(drawRect.x(), drawRect.y(), pixmap, 0, 0, pixmap.width(), pixmap.height());
    }

    delete composer;

    return drawRect;
}