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FXJPGImage.h

00001 /********************************************************************************
00002 *                                                                               *
00003 *                      J P E G   I m a g e   O b j e c t                        *
00004 *                                                                               *
00005 *********************************************************************************
00006 * Copyright (C) 2000,2004 by David Tyree.   All Rights Reserved.                *
00007 *********************************************************************************
00008 * This library is free software; you can redistribute it and/or                 *
00009 * modify it under the terms of the GNU Lesser General Public                    *
00010 * License as published by the Free Software Foundation; either                  *
00011 * version 2.1 of the License, or (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 GNU             *
00016 * Lesser General Public License for more details.                               *
00017 *                                                                               *
00018 * You should have received a copy of the GNU Lesser General Public              *
00019 * License along with this library; if not, write to the Free Software           *
00020 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA.    *
00021 *********************************************************************************
00022 * $Id: FXJPGImage.h,v 1.12 2004/02/08 17:17:33 fox Exp $                        *
00023 ********************************************************************************/
00024 #ifndef FXJPGIMAGE_H
00025 #define FXJPGIMAGE_H
00026 
00027 #ifndef FXIMAGE_H
00028 #include "FXImage.h"
00029 #endif
00030 
00031 namespace FX {
00032 
00033 
00034 /// JPEG Image class
00035 class FXAPI FXJPGImage : public FXImage {
00036   FXDECLARE(FXJPGImage)
00037 protected:
00038   FXint quality;
00039 protected:
00040   FXJPGImage(){}
00041 private:
00042   FXJPGImage(const FXJPGImage&);
00043   FXJPGImage &operator=(const FXJPGImage&);
00044 public:
00045 
00046   /// Construct an image from memory stream formatted in JPEG format
00047   FXJPGImage(FXApp *a,const void *pix=NULL,FXuint opts=0,FXint w=1,FXint h=1);
00048 
00049   /// Save pixels into stream in JPEG format
00050   virtual FXbool loadPixels(FXStream& store);
00051 
00052   /// Load pixels from stream in JPEG format
00053   virtual FXbool savePixels(FXStream& store) const;
00054 
00055   /// Set image quality to save with
00056   void setQuality(FXint q){ quality=q; }
00057 
00058   /// Get image quality setting
00059   FXint getQuality() const { return quality; }
00060 
00061   /// Destroy
00062   virtual ~FXJPGImage();
00063   };
00064 
00065 
00066 /**
00067 * Load an JPEG (Joint Photographics Experts Group) file from a stream.
00068 * Upon successful return, the pixel array and size are returned.
00069 * If an error occurred, the pixel array is set to NULL.
00070 */
00071 extern FXAPI FXbool fxloadJPG(FXStream& store,FXColor*& data,FXint& width,FXint& height,FXint& quality);
00072 
00073 
00074 /**
00075 * Save an JPEG (Joint Photographics Experts Group) file to a stream.
00076 */
00077 extern FXAPI FXbool fxsaveJPG(FXStream& store,const FXColor* data,FXint width,FXint height,FXint quality);
00078 
00079 }
00080 
00081 #endif

Copyright © 1997-2004 Jeroen van der Zijp