140 lines
3.2 KiB
C++
140 lines
3.2 KiB
C++
/**
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* @file llimagedimentionsinfo.h
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*
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* $LicenseInfo:firstyear=2001&license=viewergpl$
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*
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* Copyright (c) 2001-2009, 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_LLIMAGEDIMENSIONSINFO_H
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#define LL_LLIMAGEDIMENSIONSINFO_H
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//-----------------------------------------------------------------------------
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// LLImageDimensionsInfo
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// helper class to get image dimensions WITHOUT loading image to memore
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// usefull when image may be too large...
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//-----------------------------------------------------------------------------
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class LLImageDimensionsInfo
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{
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public:
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LLImageDimensionsInfo():
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mData(NULL)
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,mHeight(0)
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,mWidth(0)
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{}
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~LLImageDimensionsInfo()
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{
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clean();
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}
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bool load(const std::string& src_filename,U32 codec);
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S32 getWidth() const { return mWidth;}
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S32 getHeight() const { return mHeight;}
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const std::string& getLastError()
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{
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return mLastError;
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}
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protected:
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void clean()
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{
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mInfile.close();
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delete[] mData;
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mData = NULL;
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mWidth = 0;
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mHeight = 0;
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}
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U8* getData()
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{
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return mData;
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}
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void setLastError(const std::string& message, const std::string& filename)
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{
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std::string error = message;
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if (!filename.empty())
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error += std::string(" FILE: ") + filename;
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mLastError = error;
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}
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bool getImageDimensionsBmp();
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bool getImageDimensionsTga();
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bool getImageDimensionsPng();
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bool getImageDimensionsJpeg();
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S32 read_s32()
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{
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char p[4];
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mInfile.read(&p[0],4);
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S32 temp = (((S32)p[3]) & 0x000000FF) |
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(((S32)p[2] << 8 ) & 0x0000FF00) |
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(((S32)p[1] << 16) & 0x00FF0000) |
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(((S32)p[0] << 24) & 0xFF000000);
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return temp;
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}
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S32 read_reverse_s32()
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{
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char p[4];
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mInfile.read(&p[0],4);
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S32 temp = (((S32)p[0]) & 0x000000FF) |
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(((S32)p[1] << 8 ) & 0x0000FF00) |
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(((S32)p[2] << 16) & 0x00FF0000) |
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(((S32)p[3] << 24) & 0xFF000000);
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return temp;
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}
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U8 read_byte()
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{
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U8 bt;
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mInfile.read(&bt,1);
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return bt;
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}
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U16 read_short()
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{
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return read_byte() << 8 | read_byte();
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}
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protected:
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LLAPRFile mInfile ;
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std::string mSrcFilename;
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std::string mLastError;
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U8* mData;
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S32 mWidth;
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S32 mHeight;
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};
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#endif
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