107 lines
2.7 KiB
C++
107 lines
2.7 KiB
C++
/*
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* @file llpngwrapper.h
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*
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* $LicenseInfo:firstyear=2007&license=viewergpl$
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*
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* Copyright (c) 2007-2009, Linden Research, Inc.
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*
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* Second Life Viewer Source Code
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* The source code in this file ("Source Code") is provided by Linden Lab
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* to you under the terms of the GNU General Public License, version 2.0
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* ("GPL"), unless you have obtained a separate licensing agreement
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* ("Other License"), formally executed by you and Linden Lab. Terms of
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* the GPL can be found in doc/GPL-license.txt in this distribution, or
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* online at http://secondlifegrid.net/programs/open_source/licensing/gplv2
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*
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* There are special exceptions to the terms and conditions of the GPL as
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* it is applied to this Source Code. View the full text of the exception
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* in the file doc/FLOSS-exception.txt in this software distribution, or
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* online at
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* http://secondlifegrid.net/programs/open_source/licensing/flossexception
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*
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* By copying, modifying or distributing this software, you acknowledge
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* that you have read and understood your obligations described above,
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* and agree to abide by those obligations.
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*
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* ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
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* WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
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* COMPLETENESS OR PERFORMANCE.
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* $/LicenseInfo$
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*/
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#ifndef LL_LLPNGWRAPPER_H
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#define LL_LLPNGWRAPPER_H
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#if LL_WINDOWS
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#include "libpng15/png.h"
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#else
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#include "libpng12/png.h"
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#endif
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#include "llimage.h"
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class LLPngWrapper
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{
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public:
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LLPngWrapper();
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virtual ~LLPngWrapper();
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public:
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struct ImageInfo
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{
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U16 mWidth;
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U16 mHeight;
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S8 mComponents;
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};
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BOOL isValidPng(U8* src);
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BOOL readPng(U8* src, LLImageRaw* rawImage, ImageInfo *infop = NULL);
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BOOL writePng(const LLImageRaw* rawImage, U8* dst);
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U32 getFinalSize();
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const std::string& getErrorMessage();
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protected:
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void normalizeImage();
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void updateMetaData();
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private:
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// Structure for writing/reading PNG data to/from memory
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// as opposed to using a file.
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struct PngDataInfo
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{
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U8 *mData;
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U32 mOffset;
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};
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static void writeFlush(png_structp png_ptr);
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static void errorHandler(png_structp png_ptr, png_const_charp msg);
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static void readDataCallback(png_structp png_ptr, png_bytep dest, png_size_t length);
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static void writeDataCallback(png_structp png_ptr, png_bytep src, png_size_t length);
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void releaseResources();
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png_structp mReadPngPtr;
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png_infop mReadInfoPtr;
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png_structp mWritePngPtr;
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png_infop mWriteInfoPtr;
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U8 **mRowPointers;
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png_uint_32 mWidth;
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png_uint_32 mHeight;
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S32 mBitDepth;
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S32 mColorType;
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S32 mChannels;
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S32 mInterlaceType;
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S32 mCompressionType;
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S32 mFilterMethod;
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U32 mFinalSize;
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F64 mGamma;
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std::string mErrorMessage;
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};
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#endif
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