font_system.h

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/*
**  ClanLib SDK
**  Copyright (c) 1997-2009 The ClanLib Team
**
**  This software is provided 'as-is', without any express or implied
**  warranty.  In no event will the authors be held liable for any damages
**  arising from the use of this software.
**
**  Permission is granted to anyone to use this software for any purpose,
**  including commercial applications, and to alter it and redistribute it
**  freely, subject to the following restrictions:
**
**  1. The origin of this software must not be misrepresented; you must not
**     claim that you wrote the original software. If you use this software
**     in a product, an acknowledgment in the product documentation would be
**     appreciated but is not required.
**  2. Altered source versions must be plainly marked as such, and must not be
**     misrepresented as being the original software.
**  3. This notice may not be removed or altered from any source distribution.
**
**  Note: Some of the libraries ClanLib may link to may have additional
**  requirements or restrictions.
**
**  File Author(s):
**
**    Mark Page
*/


#pragma once

#include "../api_display.h"
#include "font.h"

#include "../2D/subtexture.h"
#include "../Render/texture.h"

class CL_FontProvider;
class CL_Font_System_Impl;
class CL_TextureGroup;

class CL_FontProvider_System;

typedef struct _CL_Font_System_Position
{
        unsigned int glyph;

        int x_pos;

        int y_pos;

        int width;

        int height;

        int x_offset;

        int y_offset;

        int x_increment;

        int y_increment;
} CL_Font_System_Position;

class CL_Font_TextureGlyph
{
public:
        CL_Font_TextureGlyph() : glyph(0), empty_buffer(true), offset(0,0), increment(0,0) { };

        unsigned int glyph;

        bool empty_buffer;

        CL_Subtexture subtexture;

        CL_Rect geometry;


        CL_Point offset;


        CL_Point increment;
};



class CL_API_DISPLAY CL_Font_System : public CL_Font
{

public:
        CL_Font_System();

        CL_Font_System( CL_GraphicContext &context, const CL_StringRef &typeface_name, int height);

        CL_Font_System( CL_GraphicContext &context, const CL_FontDescription &desc);

        ~CL_Font_System();


public:

        CL_FontProvider_System *get_provider() const;

        CL_Font_TextureGlyph *get_glyph(CL_GraphicContext &gc, int glyph);


public:

        void set_texture_group(CL_TextureGroup &new_texture_group);

        void load_font( CL_GraphicContext &context, const CL_FontDescription &desc);

        void free_font();


        void insert_glyph(CL_GraphicContext &gc, CL_Font_System_Position &position, CL_PixelBuffer &pixel_buffer);


        void insert_glyph(CL_GraphicContext &gc, const CL_StringRef &text);

        void set_font_metrics(const CL_FontMetrics &metrics);

        static void register_font(const CL_StringRef &font_filename, const CL_StringRef &font_typeface);


private:
};

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