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/**
* @file llimagedimentionsinfo.h
*
* $LicenseInfo:firstyear=2001&license=viewerlgpl$
* Second Life Viewer Source Code
* Copyright (C) 2010, Linden Research, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation;
* version 2.1 of the License only.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA
* $/LicenseInfo$
*/
#ifndef LL_LLIMAGEDIMENSIONSINFO_H
#define LL_LLIMAGEDIMENSIONSINFO_H
//-----------------------------------------------------------------------------
// LLImageDimensionsInfo
// helper class to get image dimensions WITHOUT loading image to memore
// usefull when image may be too large...
//-----------------------------------------------------------------------------
class LLImageDimensionsInfo
{
public:
LLImageDimensionsInfo():
mData(NULL)
,mHeight(0)
,mWidth(0)
{}
~LLImageDimensionsInfo()
{
clean();
}
bool load(const std::string& src_filename,U32 codec);
S32 getWidth() const { return mWidth;}
S32 getHeight() const { return mHeight;}
const std::string& getLastError()
{
return mLastError;
}
protected:
void clean()
{
mInfile.close();
delete[] mData;
mData = NULL;
mWidth = 0;
mHeight = 0;
}
U8* getData()
{
return mData;
}
void setLastError(const std::string& message, const std::string& filename)
{
std::string error = message;
if (!filename.empty())
error += std::string(" FILE: ") + filename;
mLastError = error;
}
bool getImageDimensionsBmp();
bool getImageDimensionsTga();
bool getImageDimensionsPng();
bool getImageDimensionsJpeg();
S32 read_s32()
{
char p[4];
mInfile.read(&p[0],4);
S32 temp = (((S32)p[3]) & 0x000000FF) |
(((S32)p[2] << 8 ) & 0x0000FF00) |
(((S32)p[1] << 16) & 0x00FF0000) |
(((S32)p[0] << 24) & 0xFF000000);
return temp;
}
S32 read_reverse_s32()
{
char p[4];
mInfile.read(&p[0],4);
S32 temp = (((S32)p[0]) & 0x000000FF) |
(((S32)p[1] << 8 ) & 0x0000FF00) |
(((S32)p[2] << 16) & 0x00FF0000) |
(((S32)p[3] << 24) & 0xFF000000);
return temp;
}
U8 read_byte()
{
U8 bt;
mInfile.read(&bt,1);
return bt;
}
U16 read_short()
{
return read_byte() << 8 | read_byte();
}
/// Check if the file is not shorter than min_len bytes.
bool checkFileLength(S32 min_len);
protected:
LLAPRFile mInfile ;
std::string mSrcFilename;
std::string mLastError;
U8* mData;
S32 mWidth;
S32 mHeight;
};
#endif
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