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/*
* FTGL - OpenGL font library
*
* Copyright (c) 2001-2004 Henry Maddocks <ftgl@opengl.geek.nz>
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#ifndef __FTSize__
#define __FTSize__
#include <ft2build.h>
#include FT_FREETYPE_H
#include "FTGL/ftgl.h"
/**
* FTSize class provides an abstraction layer for the Freetype Size.
*
* @see "Freetype 2 Documentation"
*
*/
class FTSize
{
public:
/**
* Default Constructor
*/
FTSize();
/**
* Destructor
*/
virtual ~FTSize();
/**
* Sets the char size for the current face.
*
* This doesn't guarantee that the size was set correctly. Clients
* should check errors. If an error does occur the size object isn't modified.
*
* @param face Parent face for this size object
* @param point_size the face size in points (1/72 inch)
* @param x_resolution the horizontal resolution of the target device.
* @param y_resolution the vertical resolution of the target device.
* @return <code>true</code> if the size has been set. Clients should check Error() for more information if this function returns false()
*/
bool CharSize(FT_Face* face, unsigned int point_size,
unsigned int x_resolution, unsigned int y_resolution);
/**
* get the char size for the current face.
*
* @return The char size in points
*/
unsigned int CharSize() const;
/**
* Gets the global ascender height for the face in pixels.
*
* @return Ascender height
*/
float Ascender() const;
/**
* Gets the global descender height for the face in pixels.
*
* @return Ascender height
*/
float Descender() const;
/**
* Gets the global face height for the face.
*
* If the face is scalable this returns the height of the global
* bounding box which ensures that any glyph will be less than or
* equal to this height. If the font isn't scalable there is no
* guarantee that glyphs will not be taller than this value.
*
* @return height in pixels.
*/
float Height() const;
/**
* Gets the global face width for the face.
*
* If the face is scalable this returns the width of the global
* bounding box which ensures that any glyph will be less than or
* equal to this width. If the font isn't scalable this value is
* the max_advance for the face.
*
* @return width in pixels.
*/
float Width() const;
/**
* Gets the underline position for the face.
*
* @return underline position in pixels
*/
float Underline() const;
/**
* Queries for errors.
*
* @return The current error code.
*/
FT_Error Error() const { return err; }
private:
/**
* The current Freetype face that this FTSize object relates to.
*/
FT_Face* ftFace;
/**
* The Freetype size.
*/
FT_Size ftSize;
/**
* The size in points.
*/
unsigned int size;
/**
* The horizontal resolution.
*/
unsigned int xResolution;
/**
* The vertical resolution.
*/
unsigned int yResolution;
/**
* Current error code. Zero means no error.
*/
FT_Error err;
};
#endif // __FTSize__
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