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FXGIFCursor.h

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00001 /********************************************************************************
00002 *                                                                               *
00003 *                        G I F   C u r so r   O b j e c t                       *
00004 *                                                                               *
00005 *********************************************************************************
00006 * Copyright (C) 2000,2009 by Daniel Gehriger.   All Rights Reserved.            *
00007 *********************************************************************************
00008 * This library is free software; you can redistribute it and/or modify          *
00009 * it under the terms of the GNU Lesser General Public License as published by   *
00010 * the Free Software Foundation; either version 3 of the License, or             *
00011 * (at your option) any later version.                                           *
00012 *                                                                               *
00013 * This library is distributed in the hope that it will be useful,               *
00014 * but WITHOUT ANY WARRANTY; without even the implied warranty of                *
00015 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the                 *
00016 * GNU Lesser General Public License for more details.                           *
00017 *                                                                               *
00018 * You should have received a copy of the GNU Lesser General Public License      *
00019 * along with this program.  If not, see <http://www.gnu.org/licenses/>          *
00020 *********************************************************************************
00021 * $Id: FXGIFCursor.h,v 1.29 2009/01/06 13:07:24 fox Exp $                       *
00022 ********************************************************************************/
00023 #ifndef FXGIFCURSOR_H
00024 #define FXGIFCURSOR_H
00025 
00026 #ifndef FXCURSOR_H
00027 #include "FXCursor.h"
00028 #endif
00029 
00030 namespace FX {
00031 
00032 
00033 /// GIF Cursor class
00034 class FXAPI FXGIFCursor : public FXCursor {
00035   FXDECLARE(FXGIFCursor)
00036 protected:
00037   FXGIFCursor(){}
00038 private:
00039   FXGIFCursor(const FXGIFCursor&);
00040   FXGIFCursor &operator=(const FXGIFCursor&);
00041 public:
00042   static const FXchar fileExt[];
00043 public:
00044 
00045   /**
00046   * Construct a cursor from memory stream in Compuserve GIF format.
00047   * Hot spot may be specified using hx and hy parameters, since the GIF
00048   * format does not specify a hot spot. The image must be smaller than
00049   * 32x32 pixels.
00050   */
00051   FXGIFCursor(FXApp* a,const void* pix,FXint hx=0,FXint hy=0);
00052 
00053   /// Save pixel data only, in GIF format
00054   virtual FXbool savePixels(FXStream& store) const;
00055 
00056   /// Load pixel data only, in GIF format
00057   virtual FXbool loadPixels(FXStream& store);
00058 
00059   /// Destroy
00060   virtual ~FXGIFCursor(){}
00061   };
00062 
00063 
00064 #ifndef FXLOADGIF
00065 #define FXLOADGIF
00066 
00067 /**
00068 * Check if stream contains a GIF, return true if so.
00069 */
00070 extern FXAPI FXbool fxcheckGIF(FXStream& store);
00071 
00072 
00073 /**
00074 * Load an GIF (Graphics Interchange Format) file from a stream; if the flag
00075 * flag is true, the background color is considered transparent.  Upon successful return,
00076 * the pixel array and size are returned.  If an error occurred, the pixel array is set to NULL.
00077 */
00078 extern FXAPI FXbool fxloadGIF(FXStream& store,FXColor*& data,FXint& width,FXint& height,FXbool flag=true);
00079 
00080 
00081 /**
00082 * Save an GIF (Graphics Interchange Format) file to a stream.  If flag
00083 * is true, the faster Floyd-Steinberg dither method instead of the slower Wu
00084 * quantization algorithm.
00085 */
00086 extern FXAPI FXbool fxsaveGIF(FXStream& store,const FXColor *data,FXint width,FXint height,FXbool flag=true);
00087 
00088 #endif
00089 
00090 }
00091 
00092 #endif

Copyright © 1997-2009 Jeroen van der Zijp