llpngwrapper.h
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- /*
- * @file llpngwrapper.h
- *
- * $LicenseInfo:firstyear=2007&license=viewergpl$
- *
- * Copyright (c) 2007-2010, Linden Research, Inc.
- *
- * Second Life Viewer Source Code
- * The source code in this file ("Source Code") is provided by Linden Lab
- * to you under the terms of the GNU General Public License, version 2.0
- * ("GPL"), unless you have obtained a separate licensing agreement
- * ("Other License"), formally executed by you and Linden Lab. Terms of
- * the GPL can be found in doc/GPL-license.txt in this distribution, or
- * online at http://secondlifegrid.net/programs/open_source/licensing/gplv2
- *
- * There are special exceptions to the terms and conditions of the GPL as
- * it is applied to this Source Code. View the full text of the exception
- * in the file doc/FLOSS-exception.txt in this software distribution, or
- * online at
- * http://secondlifegrid.net/programs/open_source/licensing/flossexception
- *
- * By copying, modifying or distributing this software, you acknowledge
- * that you have read and understood your obligations described above,
- * and agree to abide by those obligations.
- *
- * ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
- * WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
- * COMPLETENESS OR PERFORMANCE.
- * $/LicenseInfo$
- */
- #ifndef LL_LLPNGWRAPPER_H
- #define LL_LLPNGWRAPPER_H
- #include "libpng12/png.h"
- #include "llimage.h"
- class LLPngWrapper
- {
- public:
- LLPngWrapper();
- virtual ~LLPngWrapper();
- public:
- struct ImageInfo
- {
- U16 mWidth;
- U16 mHeight;
- S8 mComponents;
- };
- BOOL isValidPng(U8* src);
- BOOL readPng(U8* src, LLImageRaw* rawImage, ImageInfo *infop = NULL);
- BOOL writePng(const LLImageRaw* rawImage, U8* dst);
- U32 getFinalSize();
- const std::string& getErrorMessage();
- protected:
- void normalizeImage();
- void updateMetaData();
- private:
- // Structure for writing/reading PNG data to/from memory
- // as opposed to using a file.
- struct PngDataInfo
- {
- U8 *mData;
- U32 mOffset;
- };
- static void writeFlush(png_structp png_ptr);
- static void errorHandler(png_structp png_ptr, png_const_charp msg);
- static void readDataCallback(png_structp png_ptr, png_bytep dest, png_size_t length);
- static void writeDataCallback(png_structp png_ptr, png_bytep src, png_size_t length);
- void releaseResources();
- png_structp mReadPngPtr;
- png_infop mReadInfoPtr;
- png_structp mWritePngPtr;
- png_infop mWriteInfoPtr;
- U8 **mRowPointers;
- png_uint_32 mWidth;
- png_uint_32 mHeight;
- S32 mBitDepth;
- S32 mColorType;
- S32 mChannels;
- S32 mInterlaceType;
- S32 mCompressionType;
- S32 mFilterMethod;
- U32 mFinalSize;
- bool mHasBKGD;
- png_color_16p mBackgroundColor;
- F64 mGamma;
- std::string mErrorMessage;
- };
- #endif