146 lines
3.5 KiB
C++
146 lines
3.5 KiB
C++
/**
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* @file llimagedimentionsinfo.h
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*
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* $LicenseInfo:firstyear=2001&license=viewerlgpl$
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* Second Life Viewer Source Code
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* Copyright (C) 2010, Linden Research, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation;
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* version 2.1 of the License only.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*
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* Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA
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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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#include "llapr.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(nullptr)
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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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const std::string& getWarningName()
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{
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return mWarning;
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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 = nullptr;
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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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/// Check if the file is not shorter than min_len bytes.
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bool checkFileLength(S32 min_len);
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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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std::string mWarning;
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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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