36 lines
1.1 KiB
C++
36 lines
1.1 KiB
C++
// pbitmap.h
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// Data structures defining a "persistent" bitmap -- a bitmap
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// that can be stored and fetched off of disk
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//
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// A persistent bitmap can either be initialized from the disk
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// when it is created, or it can be initialized later using
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// the FetchFrom method
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//
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// Copyright (c) 1992,1993,1995 The Regents of the University of California.
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// All rights reserved. See copyright.h for copyright notice and limitation
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// of liability and disclaimer of warranty provisions.
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#ifndef PBITMAP_H
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#define PBITMAP_H
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#include "copyright.h"
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#include "bitmap.h"
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#include "openfile.h"
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// The following class defines a persistent bitmap. It inherits all
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// the behavior of a bitmap (see bitmap.h), adding the ability to
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// be read from and stored to the disk.
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class PersistentBitmap : public Bitmap {
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public:
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PersistentBitmap(OpenFile *file,int numItems); //initialize bitmap from disk
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PersistentBitmap(int numItems); // or don't...
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~PersistentBitmap(); // deallocate bitmap
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void FetchFrom(OpenFile *file); // read bitmap from the disk
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void WriteBack(OpenFile *file); // write bitmap contents to disk
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};
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#endif // PBITMAP_H
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