/***************************************************************************\
*
* File: Geom2D.h
*
* Description:
* Geom2D defines a standard lightweight objects for 2D space, including
* size, point, and rect.
*
*
* History:
*  2/10/2001: JStall:       Copied from \windows\AdvCore\Gdiplus\sdkinc\GdiplusTypes.h
*
* Copyright (C) 2001 by Microsoft Corporation.  All rights reserved.
* 
\***************************************************************************/


#if !defined(DUSERX___Types_h__INCLUDED)
#define DUSERX___Types_h__INCLUDED
#pragma once

namespace DirectUser
{
namespace Geometry
{
typedef float REAL;


//--------------------------------------------------------------------------
// Primitive data types
//
// NOTE:
//  Types already defined in standard header files:
//      INT8
//      UINT8
//      INT16
//      UINT16
//      INT32
//      UINT32
//      INT64
//      UINT64
//
//  Avoid using the following types:
//      LONG - use INT
//      ULONG - use UINT
//      DWORD - use UINT32
//--------------------------------------------------------------------------

// Forward declarations
class Size;
class SizeF;
class Point;
class PointF;
class Rect;
class RectF;


//--------------------------------------------------------------------------
// Represents a dimension in a 2D coordinate system
//  (floating-point coordinates)
//--------------------------------------------------------------------------

class SizeF
{
public:

   // Default constructor
    SizeF()
    {
        
    }
   
    SizeF(bool fInit)
    {
        if (fInit) {
            Width = Height = 0.0f;
        }
    }

    SizeF(IN const SizeF& size)
    {
        Width = size.Width;
        Height = size.Height;
    }

    SizeF(IN REAL width,
          IN REAL height)
    {
        Width = width;
        Height = height;
    }

    SizeF operator+(IN const SizeF& sz) const
    {
        return SizeF(Width + sz.Width,
                     Height + sz.Height);
    }

    SizeF operator-(IN const SizeF& sz) const
    {
        return SizeF(Width - sz.Width,
                     Height - sz.Height);
    }

    BOOL Equals(IN const SizeF& sz) const
    {
        return (Width == sz.Width) && (Height == sz.Height);
    }

    BOOL Empty() const
    {
        return (Width == 0.0f && Height == 0.0f);
    }

public:

    REAL Width;
    REAL Height;
};

//--------------------------------------------------------------------------
// Represents a dimension in a 2D coordinate system
//  (integer coordinates)
//--------------------------------------------------------------------------

class Size
{
public:

   // Default constructor
    Size()
    {
        
    }
   
    Size(bool fInit)
    {
        if (fInit) {
            Width = Height = 0;
        }
    }

    Size(IN const Size& size)
    {
        Width = size.Width;
        Height = size.Height;
    }

    Size(IN INT width,
         IN INT height)
    {
        Width = width;
        Height = height;
    }

    Size operator+(IN const Size& sz) const
    {
        return Size(Width + sz.Width,
                    Height + sz.Height);
    }

    Size operator-(IN const Size& sz) const
    {
        return Size(Width - sz.Width,
                    Height - sz.Height);
    }

    BOOL Equals(IN const Size& sz) const
    {
        return (Width == sz.Width) && (Height == sz.Height);
    }

    BOOL Empty() const
    {
        return (Width == 0 && Height == 0);
    }

public:

    INT Width;
    INT Height;
};

//--------------------------------------------------------------------------
// Represents a location in a 2D coordinate system
//  (floating-point coordinates)
//--------------------------------------------------------------------------

class PointF
{
public:
   PointF()
   {
    
   }
    
   PointF(bool fInit)
   {
       if (fInit) {
           X = Y = 0.0f;
       }
   }

   PointF(IN const PointF &point)
   {
       X = point.X;
       Y = point.Y;
   }

   PointF(IN const SizeF &size)
   {
       X = size.Width;
       Y = size.Height;
   }

   PointF(IN REAL x,
          IN REAL y)
   {
       X = x;
       Y = y;
   }

   PointF operator+(IN const PointF& point) const
   {
       return PointF(X + point.X,
                     Y + point.Y);
   }

   PointF operator-(IN const PointF& point) const
   {
       return PointF(X - point.X,
                     Y - point.Y);
   }

   BOOL Equals(IN const PointF& point)
   {
       return (X == point.X) && (Y == point.Y);
   }

public:

    REAL X;
    REAL Y;
};

//--------------------------------------------------------------------------
// Represents a location in a 2D coordinate system
//  (integer coordinates)
//--------------------------------------------------------------------------

class Point
{
public:
   Point()
   {
    
   }
    
   Point(bool fInit)
   {
       if (fInit) {
           X = Y = 0;
       }
   }

   Point(IN const Point &point)
   {
       X = point.X;
       Y = point.Y;
   }

   Point(IN const Size &size)
   {
       X = size.Width;
       Y = size.Height;
   }

   Point(IN INT x,
         IN INT y)
   {
       X = x;
       Y = y;
   }

   Point operator+(IN const Point& point) const
   {
       return Point(X + point.X,
                    Y + point.Y);
   }

   Point operator-(IN const Point& point) const
   {
       return Point(X - point.X,
                    Y - point.Y);
   }

   BOOL Equals(IN const Point& point)
   {
       return (X == point.X) && (Y == point.Y);
   }

public:

    INT X;
    INT Y;
};

//--------------------------------------------------------------------------
// Represents a rectangle in a 2D coordinate system
//  (floating-point coordinates)
//--------------------------------------------------------------------------

class RectF
{
public:

    // Default constructor

    RectF()
    {
        
    }
    
    RectF(bool fInit)
    {
        if (fInit) {
            X = Y = Width = Height = 0.0f;
        }
    }

    RectF(IN REAL x,
          IN REAL y,
          IN REAL width,
          IN REAL height)
    {
        X = x;
        Y = y;
        Width = width;
        Height = height;
    }

    RectF(IN const PointF& location,
          IN const SizeF& size)
    {
        X = location.X;
        Y = location.Y;
        Width = size.Width;
        Height = size.Height;
    }

    RectF* Clone() const
    {
        return new RectF(X, Y, Width, Height);
    }

    VOID GetLocation(OUT PointF* point) const
    {
        point->X = X;
        point->Y = Y;
    }

    VOID GetSize(OUT SizeF* size) const
    {
        size->Width = Width;
        size->Height = Height;
    }

    VOID GetBounds(OUT RectF* rect) const
    {
        rect->X = X;
        rect->Y = Y;
        rect->Width = Width;
        rect->Height = Height;
    }

    // Return the left, top, right, and bottom
    // coordinates of the rectangle

    REAL GetLeft() const
    {
        return X;
    }

    void SetLeft(REAL x)
    {
        X = x;
    }

    REAL GetTop() const
    {
        return Y;
    }

    void SetTop(REAL y)
    {
        Y = y;
    }

    REAL GetRight() const
    {
        return X+Width;
    }

    REAL GetBottom() const
    {
        return Y+Height;
    }

    // Determine if the rectangle is empty
    BOOL IsEmptyArea() const
    {
        REAL epsilon = 1.192092896e-07F;        /* FLT_EPSILON */

        return (Width <= epsilon) || (Height <= epsilon);
    }

    BOOL Equals(IN const RectF & rect) const
    {
        return X == rect.X &&
               Y == rect.Y &&
               Width == rect.Width &&
               Height == rect.Height;
    }

    BOOL Contains(IN REAL x,
                  IN REAL y) const
    {
        return x >= X && x < X+Width &&
               y >= Y && y < Y+Height;
    }

    BOOL Contains(IN const PointF& pt) const
    {
        return Contains(pt.X, pt.Y);
    }

    BOOL Contains(IN const RectF& rect) const
    {
        return (X <= rect.X) && (rect.GetRight() <= GetRight()) &&
               (Y <= rect.Y) && (rect.GetBottom() <= GetBottom());
    }

    VOID Inflate(IN REAL dx,
                 IN REAL dy)
    {
        X -= dx;
        Y -= dy;
        Width += 2*dx;
        Height += 2*dy;
    }

    VOID Inflate(IN const PointF& point)
    {
        Inflate(point.X, point.Y);
    }

    // Intersect the current rect with the specified object

    BOOL Intersect(IN const RectF& rect)
    {
        return Intersect(*this, *this, rect);
    }

    // Intersect rect a and b and save the result into c
    // Notice that c may be the same object as a or b.

    static BOOL Intersect(OUT RectF& c,
                          IN const RectF& a,
                          IN const RectF& b)
    {
        REAL right = min(a.GetRight(), b.GetRight());
        REAL bottom = min(a.GetBottom(), b.GetBottom());
        REAL left = max(a.GetLeft(), b.GetLeft());
        REAL top = max(a.GetTop(), b.GetTop());

        c.X = left;
        c.Y = top;
        c.Width = right - left;
        c.Height = bottom - top;
        return !c.IsEmptyArea();
    }

    // Determine if the specified rect intersects with the
    // current rect object.

    BOOL IntersectsWith(IN const RectF& rect) const
    {
        return (GetLeft() < rect.GetRight() &&
                GetTop() < rect.GetBottom() &&
                GetRight() > rect.GetLeft() &&
                GetBottom() > rect.GetTop());
    }

    static BOOL Union(OUT RectF& c,
                      IN const RectF& a,
                      IN const RectF& b)
    {
        REAL right = max(a.GetRight(), b.GetRight());
        REAL bottom = max(a.GetBottom(), b.GetBottom());
        REAL left = min(a.GetLeft(), b.GetLeft());
        REAL top = min(a.GetTop(), b.GetTop());

        c.X = left;
        c.Y = top;
        c.Width = right - left;
        c.Height = bottom - top;
        return !c.IsEmptyArea();
    }

    VOID Offset(IN const PointF& point)
    {
        Offset(point.X, point.Y);
    }

    VOID Offset(IN REAL dx,
                IN REAL dy)
    {
        X += dx;
        Y += dy;
    }

public:

    REAL X;
    REAL Y;
    REAL Width;
    REAL Height;
};

//--------------------------------------------------------------------------
// Represents a rectangle in a 2D coordinate system
//  (integer coordinates)
//--------------------------------------------------------------------------

class Rect
{
public:

    // Default constructor

    Rect()
    {
        
    }
    
    Rect(bool fInit)
    {
        if (fInit) {
            X = Y = Width = Height = 0;
        }
    }

    Rect(IN INT x,
         IN INT y,
         IN INT width,
         IN INT height)
    {
        X = x;
        Y = y;
        Width = width;
        Height = height;
    }

    Rect(IN const Point& location,
         IN const Size& size)
    {
        X = location.X;
        Y = location.Y;
        Width = size.Width;
        Height = size.Height;
    }

    Rect* Clone() const
    {
        return new Rect(X, Y, Width, Height);
    }

    VOID GetLocation(OUT Point* point) const
    {
        point->X = X;
        point->Y = Y;
    }

    VOID GetSize(OUT Size* size) const
    {
        size->Width = Width;
        size->Height = Height;
    }

    VOID GetBounds(OUT Rect* rect) const
    {
        rect->X = X;
        rect->Y = Y;
        rect->Width = Width;
        rect->Height = Height;
    }

    // Return the left, top, right, and bottom
    // coordinates of the rectangle

    INT GetLeft() const
    {
        return X;
    }

    INT GetTop() const
    {
        return Y;
    }

    INT GetRight() const
    {
        return X+Width;
    }

    INT GetBottom() const
    {
        return Y+Height;
    }

    // Determine if the rectangle is empty
    BOOL IsEmptyArea() const
    {
        return (Width <= 0) || (Height <= 0);
    }

    BOOL Equals(IN const Rect & rect) const
    {
        return X == rect.X &&
               Y == rect.Y &&
               Width == rect.Width &&
               Height == rect.Height;
    }

    BOOL Contains(IN INT x,
                  IN INT y) const
    {
        return x >= X && x < X+Width &&
               y >= Y && y < Y+Height;
    }

    BOOL Contains(IN const Point& pt) const
    {
        return Contains(pt.X, pt.Y);
    }

    BOOL Contains(IN Rect& rect) const
    {
        return (X <= rect.X) && (rect.GetRight() <= GetRight()) &&
               (Y <= rect.Y) && (rect.GetBottom() <= GetBottom());
    }

    VOID Inflate(IN INT dx,
                 IN INT dy)
    {
        X -= dx;
        Y -= dy;
        Width += 2*dx;
        Height += 2*dy;
    }

    VOID Inflate(IN const Point& point)
    {
        Inflate(point.X, point.Y);
    }

    // Intersect the current rect with the specified object

    BOOL Intersect(IN const Rect& rect)
    {
        return Intersect(*this, *this, rect);
    }

    // Intersect rect a and b and save the result into c
    // Notice that c may be the same object as a or b.

    static BOOL Intersect(OUT Rect& c,
                          IN const Rect& a,
                          IN const Rect& b)
    {
        INT right = min(a.GetRight(), b.GetRight());
        INT bottom = min(a.GetBottom(), b.GetBottom());
        INT left = max(a.GetLeft(), b.GetLeft());
        INT top = max(a.GetTop(), b.GetTop());

        c.X = left;
        c.Y = top;
        c.Width = right - left;
        c.Height = bottom - top;
        return !c.IsEmptyArea();
    }

    // Determine if the specified rect intersects with the
    // current rect object.

    BOOL IntersectsWith(IN const Rect& rect) const
    {
        return (GetLeft() < rect.GetRight() &&
                GetTop() < rect.GetBottom() &&
                GetRight() > rect.GetLeft() &&
                GetBottom() > rect.GetTop());
    }

    static BOOL Union(OUT Rect& c,
                      IN const Rect& a,
                      IN const Rect& b)
    {
        INT right = max(a.GetRight(), b.GetRight());
        INT bottom = max(a.GetBottom(), b.GetBottom());
        INT left = min(a.GetLeft(), b.GetLeft());
        INT top = min(a.GetTop(), b.GetTop());

        c.X = left;
        c.Y = top;
        c.Width = right - left;
        c.Height = bottom - top;
        return !c.IsEmptyArea();
    }

    VOID Offset(IN const Point& point)
    {
        Offset(point.X, point.Y);
    }

    VOID Offset(IN INT dx,
                IN INT dy)
    {
        X += dx;
        Y += dy;
    }

public:

    INT X;
    INT Y;
    INT Width;
    INT Height;
};

} // namespace Geometry
} // namespace DirectUser

#endif // DUSERX___Types_h__INCLUDED