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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) 2000,2005 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 1.16 2005/01/16 16:06:06 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 static const FXchar fileExt[]; 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); 00050 00051 /// Save pixels into stream in JPEG format 00052 virtual FXbool loadPixels(FXStream& store); 00053 00054 /// Load pixels from stream in JPEG format 00055 virtual FXbool savePixels(FXStream& store) const; 00056 00057 /// Set image quality to save with 00058 void setQuality(FXint q){ quality=q; } 00059 00060 /// Get image quality setting 00061 FXint getQuality() const { return quality; } 00062 00063 /// True if format is supported 00064 static const FXbool supported; 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 © 1997-2005 Jeroen van der Zijp