File indexing completed on 2024-12-22 04:07:28

 
 /*
    Copyright (c) 2003-2007 Clarence Dang <dang@kde.org>
    All rights reserved.
 
    Redistribution and use in source and binary forms, with or without
    modification, are permitted provided that the following conditions
    are met:
 
    1. Redistributions of source code must retain the above copyright
       notice, this list of conditions and the following disclaimer.
    2. Redistributions in binary form must reproduce the above copyright
       notice, this list of conditions and the following disclaimer in the
       documentation and/or other materials provided with the distribution.
 
    THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
    IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
    OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
    IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
    INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
    NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
    DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
    THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
    (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
    THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
 
 
 #define DEBUG_KP_TOOL_CROP 0
 
 
 #include "kpTransformCrop.h"
 #include "kpTransformCropPrivate.h"
 
 #include "layers/selections/image/kpAbstractImageSelection.h"
 #include "environments/commands/kpCommandEnvironment.h"
 #include "commands/kpCommandHistory.h"
 #include "document/kpDocument.h"
 #include "imagelib/kpImage.h"
 #include "commands/kpMacroCommand.h"
 #include "mainWindow/kpMainWindow.h"
 #include "pixmapfx/kpPixmapFX.h"
 #include "commands/tools/selection/kpToolSelectionCreateCommand.h"
 #include "views/manager/kpViewManager.h"
 
 
 // See the "image selection" part of the kpTransformCrop() API Doc.
 //
 // REFACTOR: Move into commands/
 class SetDocumentToSelectionImageCommand : public kpCommand
 {
 public:
     explicit SetDocumentToSelectionImageCommand (kpCommandEnvironment *environ);
     ~SetDocumentToSelectionImageCommand () override;
 
     /* (uninteresting child of macro cmd) */
     QString name () const override { return {}; }
 
     kpCommandSize::SizeType size () const override
     {
         return ImageSize (m_oldImage) +
                SelectionSize (m_fromSelectionPtr) +
                ImageSize (m_imageIfFromSelectionDoesntHaveOne);
     }
 
     // ASSUMPTION: Document has been resized to be the same size as the
     //             selection.
     void execute () override;
     void unexecute () override;
 
 protected:
     kpColor m_backgroundColor;
     kpImage m_oldImage;
     kpAbstractImageSelection *m_fromSelectionPtr;
     kpImage m_imageIfFromSelectionDoesntHaveOne;
 };
 
 
 SetDocumentToSelectionImageCommand::SetDocumentToSelectionImageCommand (kpCommandEnvironment *environ)
     : kpCommand (environ),
       m_backgroundColor (environ->backgroundColor ()),
       m_fromSelectionPtr (
         dynamic_cast <kpAbstractImageSelection *> (
             environ->document ()->selection ()->clone ()))
 {
     Q_ASSERT (m_fromSelectionPtr);
 
     if ( m_fromSelectionPtr )  // make coverity happy
     {
       m_imageIfFromSelectionDoesntHaveOne =
         m_fromSelectionPtr->hasContent () ?
             kpImage () :
             document ()->getSelectedBaseImage ();
     }
 }
 
 //---------------------------------------------------------------------
 
 SetDocumentToSelectionImageCommand::~SetDocumentToSelectionImageCommand ()
 {
     delete m_fromSelectionPtr;
 }
 
 //---------------------------------------------------------------------
 
 // public virtual [base kpCommand]
 void SetDocumentToSelectionImageCommand::execute ()
 {
 #if DEBUG_KP_TOOL_CROP
     qCDebug(kpLogImagelib) << "SetDocumentToSelectionImageCommand::execute()";
 #endif
 
     viewManager ()->setQueueUpdates ();
     {
         // kpTransformCrop_ImageSelection's <resizeDocCommand> has
         // executed, resizing the document to be the size of the selection
         // bounding rectangle.
         Q_ASSERT (document ()->width () == m_fromSelectionPtr->width ());
         Q_ASSERT (document ()->height () == m_fromSelectionPtr->height ());
         m_oldImage = document ()->image ();
 
 
         //
         // e.g. original elliptical selection:
         //
         //     t/---\    T = original transparent selection pixel
         //     | TT |    t = outside the selection region
         //     t\__/t    [every other character] = original opaque selection pixel
         //
         // Afterwards, the _document_ image becomes:
         //
         //      b/---\   T = [unchanged]
         //      | TT |   b = background color
         //      b\__/b   [every other character] = [unchanged]
         //
         // The selection is deleted.
         //
         // TODO: Do not introduce a mask if the result will not contain
         //       any transparent pixels.
         //
 
         QImage newDocImage(document()->width(), document()->height(), QImage::Format_ARGB32_Premultiplied);
         newDocImage.fill(m_backgroundColor.toQRgb());
 
     #if DEBUG_KP_TOOL_CROP
         qCDebug(kpLogImagelib) << "\tsel: rect=" << m_fromSelectionPtr->boundingRect ()
                    << " pm=" << m_fromSelectionPtr->hasContent ();
     #endif
         QImage setTransparentImage;
 
         if (m_fromSelectionPtr->hasContent ())
         {
             setTransparentImage = m_fromSelectionPtr->transparentImage ();
 
         #if DEBUG_KP_TOOL_CROP
             qCDebug(kpLogImagelib) << "\thave pixmap; rect="
                        << setTransparentImage.rect ();
         #endif
         }
         else
         {
             setTransparentImage = m_imageIfFromSelectionDoesntHaveOne;
         #if DEBUG_KP_TOOL_CROP
             qCDebug(kpLogImagelib) << "\tno pixmap in sel - get it; rect="
                        << setTransparentImage.rect ();
         #endif
         }
 
         kpPixmapFX::paintPixmapAt (&newDocImage,
             QPoint (0, 0),
             setTransparentImage);
 
 
         document ()->setImageAt (newDocImage, QPoint (0, 0));
         document ()->selectionDelete ();
 
 
         environ ()->somethingBelowTheCursorChanged ();
     }
     viewManager ()->restoreQueueUpdates ();
 }
 
 //---------------------------------------------------------------------
 
 // public virtual [base kpCommand]
 void SetDocumentToSelectionImageCommand::unexecute ()
 {
 #if DEBUG_KP_TOOL_CROP
     qCDebug(kpLogImagelib) << "SetDocumentToSelectionImageCommand::unexecute()";
 #endif
 
     viewManager ()->setQueueUpdates ();
     {
         document ()->setImageAt (m_oldImage, QPoint (0, 0));
         m_oldImage = kpImage ();
 
     #if DEBUG_KP_TOOL_CROP
         qCDebug(kpLogImagelib) << "\tsel: rect=" << m_fromSelectionPtr->boundingRect ()
                    << " pm=" << m_fromSelectionPtr->hasContent ();
     #endif
         document ()->setSelection (*m_fromSelectionPtr);
 
         environ ()->somethingBelowTheCursorChanged ();
     }
     viewManager ()->restoreQueueUpdates ();
 }
 
 //---------------------------------------------------------------------
 
 
 void kpTransformCrop_ImageSelection (kpMainWindow *mainWindow,
         const QString &commandName, kpCommand *resizeDocCommand)
 {
     // Save starting selection, minus the border.
     auto *borderImageSel = dynamic_cast <kpAbstractImageSelection *> (
             mainWindow->document ()->selection ()->clone ());
 
     Q_ASSERT (borderImageSel);
 
     if ( !borderImageSel ) {  // make coverity happy
         return;
     }
 
     // (only interested in border)
     borderImageSel->deleteContent ();
     borderImageSel->moveTo (QPoint (0, 0));
 
     auto *environ = mainWindow->commandEnvironment ();
     auto *macroCmd = new kpMacroCommand (commandName, environ);
 
     // (must resize doc _before_ SetDocumentToSelectionImageCommand in case
     //  doc needs to gets bigger - else selection image may not fit)
     macroCmd->addCommand (resizeDocCommand);
 
 #if DEBUG_KP_TOOL_CROP
     qCDebug(kpLogImagelib) << "\tis pixmap sel";
     qCDebug(kpLogImagelib) << "\tcreating SetImage cmd";
 #endif
     macroCmd->addCommand (new SetDocumentToSelectionImageCommand (environ));
 
 
     mainWindow->addImageOrSelectionCommand (
         macroCmd,
         true/*add create cmd*/,
         false/*don't add pull cmd*/);
 
 
     // Add selection border back for convenience.
     mainWindow->commandHistory ()->addCommand (
         new kpToolSelectionCreateCommand (
             i18n ("Selection: Create"),
             *borderImageSel,
             mainWindow->commandEnvironment ()));
 
 
     delete borderImageSel;
 }