Added developer-abandoned KDE3 version of Digikam

git-svn-id: svn://anonsvn.kde.org/home/kde/branches/trinity/applications/digikam@1075997 283d02a7-25f6-0310-bc7c-ecb5cbfe19da

1 files changed, 622 insertions, 0 deletions

diff --git a/digikam/imageplugins/inserttext/inserttextwidget.cpp b/digikam/imageplugins/inserttext/inserttextwidget.cpp
new file mode 100644
index 00000000..63f2eb82
--- /dev/null
+++ b/digikam/imageplugins/inserttext/inserttextwidget.cpp
@@ -0,0 +1,622 @@
+/* ============================================================
+ *
+ * This file is a part of digiKam project
+ * http://www.digikam.org
+ *
+ * Date        : 2005-02-14
+ * Description : a widget to insert a text over an image.
+ *
+ * Copyright (C) 2005-2007 by Gilles Caulier <caulier dot gilles at gmail dot com>
+ * Copyright (C) 2006-2007 by Marcel Wiesweg <marcel dot wiesweg at gmx dot de>
+ *
+ * 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 2, 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.
+ *
+ * ============================================================ */
+
+// C++ includes.
+
+#include <cstdio>
+#include <cmath>
+
+// Qt includes.
+
+#include <qpainter.h>
+#include <qfont.h>
+#include <qfontmetrics.h>
+
+// KDE includes.
+
+#include <kstandarddirs.h>
+#include <kcursor.h>
+#include <kglobal.h>
+
+// Digikam includes.
+
+#include "imageiface.h"
+
+// Local includes.
+
+#include "inserttextwidget.h"
+#include "inserttextwidget.moc"
+
+namespace DigikamInsertTextImagesPlugin
+{
+
+InsertTextWidget::InsertTextWidget(int w, int h, QWidget *parent)
+                : QWidget(parent, 0, Qt::WDestructiveClose)
+{
+    m_currentMoving = false;
+
+    m_iface  = new Digikam::ImageIface(w, h);
+    m_data   = m_iface->getPreviewImage();
+    m_w      = m_iface->previewWidth();
+    m_h      = m_iface->previewHeight();
+    m_pixmap = new QPixmap(w, h);
+    m_pixmap->fill(colorGroup().background());
+
+    setBackgroundMode(Qt::NoBackground);
+    setMinimumSize(w, h);
+    setMouseTracking(true);
+
+    m_rect = QRect(width()/2-m_w/2, height()/2-m_h/2, m_w, m_h);
+    m_textRect = QRect();
+
+    m_backgroundColor = QColor(0xCC, 0xCC, 0xCC);
+    m_transparency    = 210;
+}
+
+InsertTextWidget::~InsertTextWidget()
+{
+    delete [] m_data;
+    delete m_iface;
+    delete m_pixmap;
+}
+
+Digikam::ImageIface* InsertTextWidget::imageIface()
+{
+    return m_iface;
+}
+
+void InsertTextWidget::resetEdit()
+{
+    // signal this needs to be filled by makePixmap
+    m_textRect = QRect();
+    makePixmap();
+    repaint(false);
+}
+
+void InsertTextWidget::setText(QString text, QFont font, QColor color, int alignMode,
+                               bool border, bool transparent, int rotation)
+{
+    m_textString      = text;
+    m_textColor       = color;
+    m_textBorder      = border;
+    m_textTransparent = transparent;
+    m_textRotation    = rotation;
+
+    switch (alignMode)
+    {
+        case ALIGN_LEFT:
+            m_alignMode = Qt::AlignLeft;
+            break;
+
+        case ALIGN_RIGHT:
+            m_alignMode = Qt::AlignRight;
+            break;
+
+        case ALIGN_CENTER:
+            m_alignMode = Qt::AlignHCenter;
+            break;
+
+        case ALIGN_BLOCK:
+            m_alignMode = Qt::AlignJustify;
+            break;
+    }
+
+    // Center text if top left corner text area is not visible.
+
+    /*
+    if ( m_textFont.pointSize() != font.pointSize() &&
+         !rect().contains( m_textRect.x(), m_textRect.y() ) )
+    {
+        m_textFont = font;
+        resetEdit();
+        return;
+    }
+    */
+
+    m_textFont = font;
+
+    makePixmap();
+    repaint(false);
+}
+
+void InsertTextWidget::setPositionHint(QRect hint)
+{
+    // interpreted by composeImage
+    m_positionHint = hint;
+    if (m_textRect.isValid())
+    {
+        // invalidate current position so that hint is certainly interpreted
+        m_textRect = QRect();
+        makePixmap();
+        repaint();
+    }
+}
+
+QRect InsertTextWidget::getPositionHint()
+{
+    QRect hint;
+    if (m_textRect.isValid())
+    {
+        // We normalize on the size of the image, but we store as int. Precision loss is no problem.
+        hint.setX(      (int) ((float)(m_textRect.x() - m_rect.x())     / (float)m_rect.width()  * 10000.0) );
+        hint.setY(      (int) ((float)(m_textRect.y() - m_rect.y())     / (float)m_rect.height() * 10000.0) );
+        hint.setWidth(  (int) ((float)m_textRect.width()  / (float)m_rect.width()  * 10000.0) );
+        hint.setHeight( (int) ((float)m_textRect.height() / (float)m_rect.height() * 10000.0) );
+    }
+    return hint;
+}
+
+Digikam::DImg InsertTextWidget::makeInsertText(void)
+{
+    int orgW = m_iface->originalWidth();
+    int orgH = m_iface->originalHeight();
+    float ratioW = (float)orgW/(float)m_w;
+    float ratioH = (float)orgH/(float)m_h;
+
+    int x, y;
+    if (m_textRect.isValid())
+    {
+        // convert from widget to image coordinates, then to original size
+        x = lroundf( (m_textRect.x() - m_rect.x()) * ratioW);
+        y = lroundf( (m_textRect.y() - m_rect.y()) * ratioH);
+    }
+    else
+    {
+        x = -1;
+        y = -1;
+    }
+
+    // Get original image
+    Digikam::DImg image = m_iface->getOriginalImg()->copy();
+
+    int borderWidth = QMAX(1, lroundf(ratioW));
+    // compose and draw result on image
+    composeImage(&image, 0, x, y,
+                  m_textFont, m_textFont.pointSizeFloat(),
+                  m_textRotation, m_textColor, m_alignMode, m_textString,
+                  m_textTransparent, m_backgroundColor,
+                  m_textBorder ? BORDER_NORMAL : BORDER_NONE, borderWidth, borderWidth);
+
+    return image;
+}
+
+void InsertTextWidget::makePixmap(void)
+{
+    int orgW = m_iface->originalWidth();
+    int orgH = m_iface->originalHeight();
+    float ratioW = (float)m_w / (float)orgW;
+    float ratioH = (float)m_h / (float)orgH;
+
+    int x, y;
+    if (m_textRect.isValid())
+    {
+        // convert from widget to image coordinates
+        x = m_textRect.x() - m_rect.x();
+        y = m_textRect.y() - m_rect.y();
+    }
+    else
+    {
+        x = -1;
+        y = -1;
+    }
+
+    // get preview image data
+    uchar *data = m_iface->getPreviewImage();
+    Digikam::DImg image(m_iface->previewWidth(), m_iface->previewHeight(), m_iface->previewSixteenBit(),
+                        m_iface->previewHasAlpha(), data);
+    delete [] data;
+
+    // paint pixmap for drawing this widget
+    // First, fill with background color
+    m_pixmap->fill(colorGroup().background());
+    QPainter p(m_pixmap);
+    // Convert image to pixmap and draw it
+    QPixmap imagePixmap = image.convertToPixmap();
+    p.drawPixmap(m_rect.x(), m_rect.y(),
+                 imagePixmap, 0, 0, imagePixmap.width(), imagePixmap.height());
+
+    // prepare painter for use by compose image
+    p.setClipRect(m_rect);
+    p.translate(m_rect.x(), m_rect.y());
+
+    // compose image and draw result directly on pixmap, with correct offset
+    QRect textRect = composeImage(&image, &p, x, y,
+                                   m_textFont, m_textFont.pointSizeFloat() * ((ratioW > ratioH) ? ratioW : ratioH),
+                                   m_textRotation, m_textColor, m_alignMode, m_textString,
+                                   m_textTransparent, m_backgroundColor,
+                                   m_textBorder ? BORDER_NORMAL : BORDER_SUPPORT, 1, 1);
+
+    p.end();
+
+    // store new text rectangle
+    // convert from image to widget coordinates
+    m_textRect.setX(textRect.x() + m_rect.x());
+    m_textRect.setY(textRect.y() + m_rect.y());
+    m_textRect.setSize(textRect.size());
+}
+
+/*
+   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(Digikam::DImg *image, QPainter *destPainter,
+                                     int x, int y,
+                                     QFont font, float pointSize, int textRotation, QColor textColor,
+                                     int alignMode, const QString &textString,
+                                     bool transparentBackground, QColor backgroundColor,
+                                     BorderMode borderMode, int borderWidth, int spacing)
+{
+    /*
+        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.
+    */
+    Digikam::DColorComposer *composer = Digikam::DColorComposer::getComposer(Digikam::DColorComposer::PorterDuffNone);
+
+    int maxWidth, maxHeight;
+    if (x == -1 && y == -1)
+    {
+        maxWidth = image->width();
+        maxHeight = image->height();
+    }
+    else
+    {
+        maxWidth = image->width() - x;
+        maxHeight = image->height() - y;
+    }
+
+    // find out size of the area that we are drawing to
+    font.setPointSizeFloat(pointSize);
+    QFontMetrics fontMt( font );
+    QRect fontRect = fontMt.boundingRect(0, 0, maxWidth, maxHeight, 0, textString);
+
+    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)
+    {
+        // was a valid position hint stored from last use?
+        if (m_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)m_positionHint.top()    / 10000.0;
+            float fromBottom = 1.0 - (float)m_positionHint.bottom() / 10000.0;
+            float fromLeft =         (float)m_positionHint.left()   / 10000.0;
+            float fromRight =  1.0 - (float)m_positionHint.right()  / 10000.0;
+
+            // calculate horizontal position
+            if (fromLeft < fromRight)
+            {
+                x = (int)(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 + fontWidth > maxWidth)
+                    x = QMAX( (maxWidth - fontWidth) / 2, 0);
+            }
+            else
+            {
+                x = maxWidth - (int)(fromRight * maxWidth) - fontWidth;
+                if ( x < 0 )
+                    x = QMAX( (maxWidth - fontWidth) / 2, 0);
+            }
+
+            // calculate vertical position
+            if (fromTop < fromBottom)
+            {
+                y = (int)(fromTop * maxHeight);
+                if (y + fontHeight > maxHeight)
+                    y = QMAX( (maxHeight - fontHeight) / 2, 0);
+            }
+            else
+            {
+                y = maxHeight - (int)(fromBottom * maxHeight) - fontHeight;
+                if ( y < 0 )
+                    y = QMAX( (maxHeight - fontHeight) / 2, 0);
+            }
+
+            if (! QRect(x, y, fontWidth, fontHeight).
+                   intersects(QRect(0, 0, maxWidth, maxHeight)) )
+            {
+                // emergency fallback - nothing is visible
+                x = QMAX( (maxWidth - fontWidth) / 2, 0);
+                y = QMAX( (maxHeight - fontHeight) / 2, 0);
+            }
+
+            // invalidate position hint, use only once
+            m_positionHint = QRect();
+        }
+        else
+        {
+            // use standard position
+            x = QMAX( (maxWidth - fontWidth) / 2, 0);
+            y = QMAX( (maxHeight - fontHeight) / 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
+    Digikam::DImg textArea = image->copy(drawRect);
+
+    if (textArea.isNull())
+        return QRect();
+
+    // compose semi-transparent background over textArea
+    if (transparentBackground)
+    {
+        Digikam::DImg transparentLayer(textAreaBackgroundRect.width(), textAreaBackgroundRect.height(), textArea.sixteenBit(), true);
+        Digikam::DColor transparent(backgroundColor);
+        transparent.setAlpha(m_transparency);
+        if (image->sixteenBit())
+            transparent.convertToSixteenBit();
+        transparentLayer.fill(transparent);
+        textArea.bitBlendImage(composer, &transparentLayer, 0, 0, transparentLayer.width(), transparentLayer.height(),
+                               textAreaBackgroundRect.x(), textAreaBackgroundRect.y());
+    }
+
+    Digikam::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 = textNotDrawn.convertToPixmap();
+    // paint on pixmap
+    QPainter p(&pixmap);
+    p.setPen( QPen(textColor, 1) ) ;
+    p.setFont( font );
+    p.save();
+
+    // translate to origin of text, leaving space for the border
+    p.translate(textAreaTextRect.x(), textAreaTextRect.y());
+
+    switch(textRotation)
+    {
+        case ROTATION_NONE:
+            p.drawText( 0, 0, textAreaTextRect.width(),
+                        textAreaTextRect.height(), alignMode, textString );
+            break;
+        case ROTATION_90:
+            p.translate(textAreaTextRect.width(), 0);
+            p.rotate(90.0);
+            p.drawText( 0, 0, textAreaTextRect.height(), textAreaTextRect.width(),
+                        alignMode, textString );
+            break;
+        case ROTATION_180:
+            p.translate(textAreaTextRect.width(), textAreaTextRect.height());
+            p.rotate(180.0);
+            p.drawText( 0, 0, textAreaTextRect.width(), textAreaTextRect.height(),
+                        alignMode, textString );
+            break;
+        case ROTATION_270:
+            p.translate(0, textAreaTextRect.height());
+            p.rotate(270.0);
+            p.drawText( 0, 0, textAreaTextRect.height(), textAreaTextRect.width(),
+                        alignMode, textString );
+            break;
+    }
+
+    p.restore();
+
+    // 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.convertToImage();
+        Digikam::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
+        Digikam::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;
+}
+
+void InsertTextWidget::paintEvent( QPaintEvent * )
+{
+    bitBlt(this, 0, 0, m_pixmap);
+}
+
+void InsertTextWidget::resizeEvent(QResizeEvent * e)
+{
+    blockSignals(true);
+    delete m_pixmap;
+
+    int w = e->size().width();
+    int h = e->size().height();
+
+    int textX = m_textRect.x() - m_rect.x();
+    int textY = m_textRect.y() - m_rect.y();
+    int old_w = m_w;
+    int old_h = m_h;
+    m_data    = m_iface->setPreviewImageSize(w, h);
+    m_w       = m_iface->previewWidth();
+    m_h       = m_iface->previewHeight();
+
+    m_pixmap = new QPixmap(w, h);
+    m_rect = QRect(w/2-m_w/2, h/2-m_h/2, m_w, m_h);
+
+    if (m_textRect.isValid())
+    {
+        int textWidth  = m_textRect.width();
+        int textHeight = m_textRect.height();
+
+        textX = lroundf( textX * (float)m_w / (float)old_w );
+        textY = lroundf( textY * (float)m_h / (float)old_h );
+        textWidth  = lroundf(textWidth  * (float)m_w / (float)old_w );
+        textHeight = lroundf(textHeight * (float)m_h / (float)old_h );
+
+        m_textRect.setX(textX + m_rect.x());
+        m_textRect.setY(textY + m_rect.y());
+        m_textRect.setWidth(textWidth);
+        m_textRect.setHeight(textHeight);
+        makePixmap();
+    }
+
+    blockSignals(false);
+}
+
+void InsertTextWidget::mousePressEvent ( QMouseEvent * e )
+{
+    if ( e->button() == Qt::LeftButton &&
+         m_textRect.contains( e->x(), e->y() ) )
+    {
+        m_xpos = e->x();
+        m_ypos = e->y();
+        setCursor ( KCursor::sizeAllCursor() );
+        m_currentMoving = true;
+    }
+}
+
+void InsertTextWidget::mouseReleaseEvent ( QMouseEvent * )
+{
+    setCursor ( KCursor::arrowCursor() );
+    m_currentMoving = false;
+}
+
+void InsertTextWidget::mouseMoveEvent ( QMouseEvent * e )
+{
+    if ( rect().contains( e->x(), e->y() ) )
+    {
+        if ( e->state() == Qt::LeftButton && m_currentMoving )
+        {
+            uint newxpos = e->x();
+            uint newypos = e->y();
+
+            m_textRect.moveBy(newxpos - m_xpos, newypos - m_ypos);
+
+            makePixmap();
+            repaint(false);
+
+            m_xpos = newxpos;
+            m_ypos = newypos;
+            setCursor( KCursor::handCursor() );
+        }
+        else if ( m_textRect.contains( e->x(), e->y() ) )
+        {
+            setCursor ( KCursor::sizeAllCursor() );
+        }
+        else
+        {
+            setCursor ( KCursor::arrowCursor() );
+        }
+    }
+}
+
+}  // NameSpace DigikamInsertTextImagesPlugin