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/* Copyright (C) 2009 Wildfire Games.
* This file is part of 0 A.D.
*
* 0 A.D. is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 of the License, or
* (at your option) any later version.
*
* 0 A.D. 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with 0 A.D. If not, see <http://www.gnu.org/licenses/>.
*/

/*
Overlay.h

--Overview--

Class representing 2D screen overlays; includes functionality for overlay
position, color, texture and borders.
*/

#ifndef INCLUDED_OVERLAY
#define INCLUDED_OVERLAY

#include "graphics/SColor.h"

class CStr8;

struct CColor
{
CColor() : r(-1.f), g(-1.f), b(-1.f), a(1.f) {}
CColor(float cr,float cg,float cb,float ca) : r(cr), g(cg), b(cb), a(ca) {}

bool ParseString(const CStr8& Value, float DefaultAlpha);

bool operator == (const CColor &color) const;

bool operator != (const CColor &color) const
{
return !(*this==color);
}

// For passing to glColor[34]fv:
const float* FloatArray() const { return &r; }

// For passing to CRenderer:
SColor4ub AsSColor4ub() const
{
return SColor4ub((u8)(r*255.0), (u8)(g*255.0), (u8)(b*255.0), (u8)(a*255.0));
}

float r, g, b, a;
};

class CPos;
class CSize;


/**
* Rectangle class used for screen rectangles. It's very similar to the MS
* CRect, but with FLOATS because it's meant to be used with OpenGL which
* takes float values.
*
* Changed to floats 2004-08-31 /GL
*/
class CRect
{
public:
CRect();
CRect(const CPos &pos);
CRect(const CSize &size);
CRect(const CPos &upperleft, const CPos &bottomright);
CRect(const CPos &pos, const CSize &size);
CRect(const float l, const float t, const float r, const float b);

// Operators
void operator = (const CRect& a);
bool operator == (const CRect& a) const;
bool operator != (const CRect& a) const;
CRect operator - (void) const;
CRect operator + (void) const;

CRect operator + (const CRect& a) const;
CRect operator + (const CPos& a) const;
CRect operator + (const CSize& a) const;
CRect operator - (const CRect& a) const;
CRect operator - (const CPos& a) const;
CRect operator - (const CSize& a) const;

void operator += (const CRect& a);
void operator += (const CPos& a);
void operator += (const CSize& a);
void operator -= (const CRect& a);
void operator -= (const CPos& a);
void operator -= (const CSize& a);

/**
* @return Width of Rectangle
*/
float GetWidth() const;

/**
* @return Height of Rectangle
*/
float GetHeight() const;

/**
* Get Size
*/
CSize GetSize() const;

/**
* Get Position equivalent to top/left corner
*/
CPos TopLeft() const;

/**
* Get Position equivalent to top/right corner
*/
CPos TopRight() const;

/**
* Get Position equivalent to bottom/left corner
*/
CPos BottomLeft() const;

/**
* Get Position equivalent to bottom/right corner
*/
CPos BottomRight() const;

/**
* Get Position equivalent to the center of the rectangle
*/
CPos CenterPoint() const;

/**
* Evalutates if point is within the rectangle
* @param point CPos representing point
* @return true if inside.
*/
bool PointInside(const CPos &point) const;

CRect Scale(float x, float y) const;

/**
* Returning CPos representing each corner.
*/

public:
/**
* Dimensions
*/
float left, top, right, bottom;
};

/**
* Made to represent screen positions and delta values.
* @see CRect
* @see CSize
*/
class CPos
{
public:
CPos();
CPos(const CSize &pos);
CPos(const float &_x, const float &_y);

// Operators
void operator = (const CPos& a);
bool operator == (const CPos& a) const;
bool operator != (const CPos& a) const;
CPos operator - (void) const;
CPos operator + (void) const;

CPos operator + (const CPos& a) const;
CPos operator + (const CSize& a) const;
CPos operator - (const CPos& a) const;
CPos operator - (const CSize& a) const;

void operator += (const CPos& a);
void operator += (const CSize& a);
void operator -= (const CPos& a);
void operator -= (const CSize& a);

public:
/**
* Position
*/
float x, y;
};

/**
* Made to represent a screen size, should in philosophy
* be made of unsigned ints, but for the sake of compatibility
* with CRect and CPos it's not.
* @see CRect
* @see CPos
*/
class CSize
{
public:
CSize();
CSize(const CRect &rect);
CSize(const CPos &pos);
CSize(const float &_cx, const float &_cy);

// Operators
void operator = (const CSize& a);
bool operator == (const CSize& a) const;
bool operator != (const CSize& a) const;
CSize operator - (void) const;
CSize operator + (void) const;

CSize operator + (const CSize& a) const;
CSize operator - (const CSize& a) const;
CSize operator / (const float &a) const;
CSize operator * (const float &a) const;

void operator += (const CSize& a);
void operator -= (const CSize& a);
void operator /= (const float& a);
void operator *= (const float& a);

public:
/**
* Size
*/
float cx, cy;
};


#endif
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