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FXJPGImage.h

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00001 /********************************************************************************
00002 *                                                                               *
00003 *                      J P E G   I m a g e   O b j e c t                        *
00004 *                                                                               *
00005 *********************************************************************************
00006 * Copyright (C) 2000,2009 by David Tyree.   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: FXJPGImage.h,v 1.26 2009/01/06 13:07:25 fox Exp $                        *
00022 ********************************************************************************/
00023 #ifndef FXJPGIMAGE_H
00024 #define FXJPGIMAGE_H
00025 
00026 #ifndef FXIMAGE_H
00027 #include "FXImage.h"
00028 #endif
00029 
00030 namespace FX {
00031 
00032 
00033 /// JPEG Image class
00034 class FXAPI FXJPGImage : public FXImage {
00035   FXDECLARE(FXJPGImage)
00036 protected:
00037   FXint quality;
00038 protected:
00039   FXJPGImage(){}
00040 private:
00041   FXJPGImage(const FXJPGImage&);
00042   FXJPGImage &operator=(const FXJPGImage&);
00043 public:
00044   static const FXchar fileExt[];
00045   static const FXchar mimeType[];
00046 public:
00047 
00048   /// Construct an image from memory stream formatted in JPEG format
00049   FXJPGImage(FXApp *a,const void *pix=NULL,FXuint opts=0,FXint w=1,FXint h=1,FXint q=75);
00050 
00051   /// True if format is supported
00052   static const FXbool supported;
00053 
00054   /// Set image quality to save with
00055   void setQuality(FXint q){ quality=q; }
00056 
00057   /// Get image quality setting
00058   FXint getQuality() const { return quality; }
00059 
00060   /// Save pixels into stream in JPEG format
00061   virtual FXbool loadPixels(FXStream& store);
00062 
00063   /// Load pixels from stream in JPEG format
00064   virtual FXbool savePixels(FXStream& store) const;
00065 
00066   /// Destroy
00067   virtual ~FXJPGImage();
00068   };
00069 
00070 
00071 /**
00072 * Check if stream contains a JPG, return true if so.
00073 */
00074 extern FXAPI FXbool fxcheckJPG(FXStream& store);
00075 
00076 
00077 /**
00078 * Load an JPEG (Joint Photographics Experts Group) file from a stream.
00079 * Upon successful return, the pixel array and size are returned.
00080 * If an error occurred, the pixel array is set to NULL.
00081 */
00082 extern FXAPI FXbool fxloadJPG(FXStream& store,FXColor*& data,FXint& width,FXint& height,FXint& quality);
00083 
00084 
00085 /**
00086 * Save an JPEG (Joint Photographics Experts Group) file to a stream.
00087 */
00088 extern FXAPI FXbool fxsaveJPG(FXStream& store,const FXColor* data,FXint width,FXint height,FXint quality);
00089 
00090 }
00091 
00092 #endif

Copyright © 1997-2009 Jeroen van der Zijp