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/**
* @file llcoord.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_LLCOORD_H
#define LL_LLCOORD_H
template<typename> class LLCoord;
struct LL_COORD_TYPE_GL;
struct LL_COORD_TYPE_WINDOW;
struct LL_COORD_TYPE_SCREEN;
typedef LLCoord<LL_COORD_TYPE_GL> LLCoordGL;
typedef LLCoord<LL_COORD_TYPE_WINDOW> LLCoordWindow;
typedef LLCoord<LL_COORD_TYPE_SCREEN> LLCoordScreen;
struct LLCoordCommon
{
LLCoordCommon(S32 x, S32 y) : mX(x), mY(y) {}
LLCoordCommon() : mX(0), mY(0) {}
S32 mX;
S32 mY;
};
// A two-dimensional pixel value
template<typename COORD_FRAME>
class LLCoord : protected COORD_FRAME
{
public:
typedef LLCoord<COORD_FRAME> self_t;
typename COORD_FRAME::value_t mX;
typename COORD_FRAME::value_t mY;
LLCoord(): mX(0), mY(0)
{}
LLCoord(typename COORD_FRAME::value_t x, typename COORD_FRAME::value_t y): mX(x), mY(y)
{}
LLCoord(const LLCoordCommon& other)
{
COORD_FRAME::convertFromCommon(other);
}
LLCoordCommon convert() const
{
return COORD_FRAME::convertToCommon();
}
void set(typename COORD_FRAME::value_t x, typename COORD_FRAME::value_t y) { mX = x; mY = y;}
bool operator==(const self_t& other) const { return mX == other.mX && mY == other.mY; }
bool operator!=(const self_t& other) const { return !(*this == other); }
static const self_t& getTypedCoords(const COORD_FRAME& self) { return static_cast<const self_t&>(self); }
static self_t& getTypedCoords(COORD_FRAME& self) { return static_cast<self_t&>(self); }
};
struct LL_COORD_TYPE_GL
{
typedef S32 value_t;
LLCoordCommon convertToCommon() const
{
const LLCoordGL& self = LLCoordGL::getTypedCoords(*this);
return LLCoordCommon(self.mX, self.mY);
}
void convertFromCommon(const LLCoordCommon& from)
{
LLCoordGL& self = LLCoordGL::getTypedCoords(*this);
self.mX = from.mX;
self.mY = from.mY;
}
};
struct LL_COORD_TYPE_WINDOW
{
typedef S32 value_t;
LLCoordCommon convertToCommon() const;
void convertFromCommon(const LLCoordCommon& from);
};
struct LL_COORD_TYPE_SCREEN
{
typedef S32 value_t;
LLCoordCommon convertToCommon() const;
void convertFromCommon(const LLCoordCommon& from);
};
#endif
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