/// Copyright (c) 2009 Ruben Penalva. All rights reserved.
/// Redistribution and use in source and binary forms, with or without modification, 
/// are permitted provided that the following conditions are met:
///    1. Redistributions of source code must retain the above copyright notice, this 
///    list of conditions and the following disclaimer.
///    2. Redistributions in binary form must reproduce the above copyright notice,
///    this list of conditions and the following disclaimer in the documentation and/or
///    other materials provided with the distribution.
///    3. The name of the author may not be used to endorse or promote products derived
///    from this software without specific prior written permission.
///
/// THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
/// INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 
/// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, 
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/// TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
/// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 
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/// THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

/// @file GlyphOutlineLoader.h
/// This source file is part of LetterCDT test.
/// The file holds the GlyphOutlineLoader class interface.
/// @author Ruben Penalva (ruben.penalva@rpenalva.com)
#ifndef _GLHYPH_OUTLINE_LOADER_H_
#define _GLHYPH_OUTLINE_LOADER_H_

#include <string>
#include <map>

#include <ft2build.h>  
#include FT_FREETYPE_H 

namespace LetterCDT
{
class GlyphOutline;

/// @brief Manage loading of glyphs outlines from a font 
/// file and owns the glyphs it loads. Its in charge of
/// loaded glyphs memory management.
class GlyphOutlineLoader
{
public:
	/// Constructor
	/// @param font file path, including name
	GlyphOutlineLoader(const std::wstring& fontFile);
	
	/// Destructor
	~GlyphOutlineLoader(void);

	/// @brief It loads a glyph outline if it isn't
	/// loaded already.
	/// @note It owns the loaded instance.
	GlyphOutline* GetGlyphOutline(wchar_t charCode);

private:
	/// Freetype Library (main entry point of 
	FT_Library m_library;

	/// Freetype face
	FT_Face m_face;

	/// Cache of glyph outlines
	std::map<wchar_t, GlyphOutline*> m_glyphOutlines;

	/// @note hide copy constructor from interface user
	GlyphOutlineLoader(const GlyphOutlineLoader&);

	/// @note hide assignment operator from interface user
	GlyphOutlineLoader& operator=(const GlyphOutlineLoader&);

	/// @brief it loads a font face from a file
	/// @param fontFile path to font file, including name
	void LoadFontFace(const std::wstring& fontFile);
	
	/// @brief Destroy the loader, delete all the memory
	void Destroy(void);
};

}

#endif