forked from openkylin/kolourpaint
88 lines
3.2 KiB
C++
88 lines
3.2 KiB
C++
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/*
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Copyright (c) 2003-2007 Clarence Dang <dang@kde.org>
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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are met:
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1. Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef kpCommandSize_H
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#define kpCommandSize_H
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#include "imagelib/kpImage.h"
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class QImage;
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class QPolygon;
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class QString;
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class kpAbstractSelection;
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//
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// Estimates the size of the object being pointed to, in bytes.
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//
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// This is used by the command history to trim stored commands, once a
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// certain amount of memory is used by those commands.
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//
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class kpCommandSize
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{
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public:
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// Force 64-bit arithmetic, instead of 32-bit, to prevent overflow
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// when determining whether to clip the command history -- we might be
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// adding a large number of large sizes. This will eventually help
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// KolourPaint support more than 2GB of image data.
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//
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// For some reason, GCC doesn't warn of accidental casts to smaller types
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// (e.g. 32-bit). An easy way to get around this is to change "SizeType"
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// to be "double" temporarily and recompile - every time an implicit cast to
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// "int" (32-bit) is made, we'll be warned.
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//
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// TODO: Exhaustively test that we're not accidentally doing intermediate
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// calculations using 32-bit in some places (mainly inside
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// implementations of kpCommand::size()).
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typedef qlonglong SizeType;
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static SizeType PixmapSize (const QImage &image);
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static SizeType PixmapSize (const QImage *image);
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static SizeType PixmapSize (int width, int height, int depth);
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static SizeType QImageSize (const QImage &image);
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static SizeType QImageSize (const QImage *image);
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static SizeType QImageSize (int width, int height, int depth);
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static SizeType ImageSize (const kpImage &image);
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static SizeType ImageSize (const kpImage *image);
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static SizeType SelectionSize (const kpAbstractSelection &sel);
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static SizeType SelectionSize (const kpAbstractSelection *sel);
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static SizeType StringSize (const QString &string);
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static SizeType PolygonSize (const QPolygon &points);
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};
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#endif // kpCommandSize_H
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