File indexing completed on 2024-04-28 04:20:11

 
 /*
    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.
 */
 
 
 #ifndef kpCommandSize_H
 #define kpCommandSize_H
 
 
 #include "imagelib/kpImage.h"
 
 
 class QImage;
 class QPolygon;
 class QString;
 
 class kpAbstractSelection;
 
 
 //
 // Estimates the size of the object being pointed to, in bytes.
 //
 // This is used by the command history to trim stored commands, once a
 // certain amount of memory is used by those commands.
 //
 class kpCommandSize
 {
 public:
     // Force 64-bit arithmetic, instead of 32-bit, to prevent overflow
     // when determining whether to clip the command history -- we might be
     // adding a large number of large sizes.  This will eventually help
     // KolourPaint support more than 2GB of image data.
     //
     // For some reason, GCC doesn't warn of accidental casts to smaller types
     // (e.g. 32-bit).  An easy way to get around this is to change "SizeType"
     // to be "double" temporarily and recompile - every time an implicit cast to
     // "int" (32-bit) is made, we'll be warned.
     //
     // TODO: Exhaustively test that we're not accidentally doing intermediate
     //       calculations using 32-bit in some places (mainly inside
     //       implementations of kpCommand::size()).
     typedef qlonglong SizeType;
 
     static SizeType PixmapSize (const QImage &image);
     static SizeType PixmapSize (const QImage *image);
     static SizeType PixmapSize (int width, int height, int depth);
 
     static SizeType QImageSize (const QImage &image);
     static SizeType QImageSize (const QImage *image);
     static SizeType QImageSize (int width, int height, int depth);
 
     static SizeType ImageSize (const kpImage &image);
     static SizeType ImageSize (const kpImage *image);
 
     static SizeType SelectionSize (const kpAbstractSelection &sel);
     static SizeType SelectionSize (const kpAbstractSelection *sel);
 
     static SizeType StringSize (const QString &string);
 
     static SizeType PolygonSize (const QPolygon &points);
 };
 
 
 #endif  // kpCommandSize_H