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** Initial file written and documented by:
** Kevin Shepherd <kshepherd@php.net> December 2007
** of Scarlet Line http://www.scarletline.com/
** with contributions from Torben Nielsen.
*******************************************************************************/
/** \file gdpp.h
	\brief Object Oriented C++ wrappers around libgd functionality.

	Example usage, convert png to gif:
	#include <fstream>
	#include <gdpp.h>

	std::ifstream in("image.png", std::ios_base::in | std::ios_base::binary );
	GD::Image im(in, GD::Png_tag());
	if (im.good())
		{
		std::ofstream out("image.gif", std::ios_base::out | std::ios_base::binary );
		im.Gif(out);
		}
*/
#ifndef _gdpp_h
#define _gdpp_h
#ifdef __cplusplus

#include "gd_io_stream.h"
#include <string>

/// namespace GD:: contains the C++ wrapper classes for libgd
/** This namespace is primarily to avoid name clashes, and to
	contain all of the gd classes within one namespace.
	It is not recommended to use the "using namespace" directive with this namespace.
	Example usage:
	GD::Image	im(64, 32, true); // Create a truecolor image 64 pixels wide by 32 pixels high
	GD::Point	pt(10, 8); // The point at x=10, y=8.
	GD::Size	sz(16, 8); // The size width=16, height=8.
	GD::TrueColor	col(0xFF, 0, 0); // The colour red; R=255, G=0, B=0.
	im.Rectangle(pt, sz, col.Int()); // Draw a red rectangle with top left corner at pt, of size sz.
*/
namespace GD
{
/**	This class GD::Point stores a point in two dimensions, somewhere
	on the plane of an image.
*/
class BGD_EXPORT_DATA_PROT Point
{
public:
	// Constructors
	Point(int x, int y)
		:_x(x), _y(y) {}
	Point(const Point & p)
		:_x(p._x), _y(p._y) {}
	Point()
		:_x(0), _y(0) {}
	Point & operator=(const Point & p) {
		_x = p._x;
		_y = p._y;
		return (* this);
	}
	// Accessors
	int X() const {
		return _x;
	}
	int Y() const {
		return _y;
	}
	// Updaters
	void X(int x) {
		_x = x;
	}
	void Y(int y) {
		_y = y;
	}
	void set(int x, int y) {
		_x = x;
		_y = y;
	}
	int & lhsX() {
		return _x;
	}
	int & lhsY() {
		return _y;
	}

	gdPointPtr as_gdPointPtr() {
		return (gdPointPtr) this;
	}
protected:
	int	_x, _y;
};
typedef Point * PointPtr;
/**	This class GD::Size stores length in two dimensions.
	Giving the size of an area as width and height.
*/
class BGD_EXPORT_DATA_PROT Size
{
public:
	// Constructors
	Size(int w, int h)
		:_w(w), _h(h) {}
	Size(const Size & p)
		:_w(p._w), _h(p._h) {}
	Size()
		:_w(0), _h(0) {}
	Size & operator=(const Size & p) {
		_w = p._w;
		_h = p._h;
		return (* this);
	}
	// Accessors
	int W() const {
		return _w;
	}
	int H() const {
		return _h;
	}
	// Updaters
	void W(int w) {
		_w = w;
	}
	void H(int h) {
		_h = h;
	}
	void set(int w, int h) {
		_w = w;
		_h = h;
	}
	int & lhsW() {
		return _w;
	}
	int & lhsH() {
		return _h;
	}
protected:
	int	_w, _h;
};
typedef Size * SizePtr;

/**	This class GD::TrueColor stores a colour as an RGBA quadruplet.
	It can also be read as an integer, and in other colour formats.
*/
class BGD_EXPORT_DATA_PROT TrueColor
{
public:
	union as_types {
		int as_int;
		struct uchars {
			unsigned char blue, green, red, alpha;
		} as_uchar;
	};
	TrueColor() {
		internal.as_int = 0;
	}
	TrueColor(int c) {
		internal.as_int = c;
	}
	TrueColor(unsigned char r, unsigned char g, unsigned char b, unsigned char a = 0) {
		internal.as_uchar.alpha = a;
		internal.as_uchar.red = r;
		internal.as_uchar.green = g;
		internal.as_uchar.blue = b;
	}
	// Accessors
	int Int() const {
		return internal.as_int;
	}
	unsigned char Red() const {
		return internal.as_uchar.red;
	}
	unsigned char Green() const {
		return internal.as_uchar.green;
	}
	unsigned char Blue() const {
		return internal.as_uchar.blue;
	}
	unsigned char Alpha() const {
		return internal.as_uchar.alpha;
	}
	// Updaters
	void set(int c) {
		internal.as_int = c;
	}
	void set(unsigned char r, unsigned char g, unsigned char b, unsigned char a = 0) {
		internal.as_uchar.alph