Second Life viewer sources 1.17.2.0

1 files changed, 102 insertions, 0 deletions

diff --git a/linden/indra/llimage/llpngwrapper.h b/linden/indra/llimage/llpngwrapper.h
new file mode 100644
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+++ b/linden/indra/llimage/llpngwrapper.h
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+/*
+ * @file llpngwrapper.h
+ *
+ * Copyright (c) 2007 Peekay Semyorka.
+ * Copyright (c) 2007-2007, 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://secondlife.com/developers/opensource/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://secondlife.com/developers/opensource/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.
+ */
+
+#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();
+        LLString 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;
+
+        LLString mErrorMessage;
+};
+
+#endif