mirror of
https://github.com/AquariaOSE/Aquaria.git
synced 2024-11-29 03:33:48 +00:00
276 lines
8 KiB
C++
276 lines
8 KiB
C++
#ifndef __FTFont__
|
|
#define __FTFont__
|
|
|
|
#include <ft2build.h>
|
|
#include FT_FREETYPE_H
|
|
|
|
#include "FTFace.h"
|
|
#include "FTGL.h"
|
|
|
|
class FTGlyphContainer;
|
|
class FTGlyph;
|
|
|
|
|
|
/**
|
|
* FTFont is the public interface for the FTGL library.
|
|
*
|
|
* Specific font classes are derived from this class. It uses the helper
|
|
* classes FTFace and FTSize to access the Freetype library. This class
|
|
* is abstract and deriving classes must implement the protected
|
|
* <code>MakeGlyph</code> function to create glyphs of the
|
|
* appropriate type.
|
|
*
|
|
* It is good practice after using these functions to test the error
|
|
* code returned. <code>FT_Error Error()</code>. Check the freetype file fterrdef.h
|
|
* for error definitions.
|
|
*
|
|
* @see FTFace
|
|
* @see FTSize
|
|
* @see FTGlyphContainer
|
|
* @see FTGlyph
|
|
*/
|
|
class FTGL_EXPORT FTFont
|
|
{
|
|
public:
|
|
/**
|
|
* Open and read a font file. Sets Error flag.
|
|
*
|
|
* @param fontFilePath font file path.
|
|
*/
|
|
FTFont( const char* fontFilePath);
|
|
|
|
/**
|
|
* Open and read a font from a buffer in memory. Sets Error flag.
|
|
* The buffer is owned by the client and is NOT copied by FTGL. The
|
|
* pointer must be valid while using FTGL.
|
|
*
|
|
* @param pBufferBytes the in-memory buffer
|
|
* @param bufferSizeInBytes the length of the buffer in bytes
|
|
*/
|
|
FTFont( const unsigned char *pBufferBytes, size_t bufferSizeInBytes);
|
|
|
|
/**
|
|
* Destructor
|
|
*/
|
|
virtual ~FTFont();
|
|
|
|
/**
|
|
* Attach auxilliary file to font e.g font metrics.
|
|
*
|
|
* Note: not all font formats implement this function.
|
|
*
|
|
* @param fontFilePath auxilliary font file path.
|
|
* @return <code>true</code> if file has been attached
|
|
* successfully.
|
|
*/
|
|
bool Attach( const char* fontFilePath);
|
|
|
|
/**
|
|
* Attach auxilliary data to font e.g font metrics, from memory
|
|
*
|
|
* Note: not all font formats implement this function.
|
|
*
|
|
* @param pBufferBytes the in-memory buffer
|
|
* @param bufferSizeInBytes the length of the buffer in bytes
|
|
* @return <code>true</code> if file has been attached
|
|
* successfully.
|
|
*/
|
|
bool Attach( const unsigned char *pBufferBytes, size_t bufferSizeInBytes);
|
|
|
|
/**
|
|
* Set the character map for the face.
|
|
*
|
|
* @param encoding Freetype enumerate for char map code.
|
|
* @return <code>true</code> if charmap was valid and
|
|
* set correctly
|
|
*/
|
|
bool CharMap( FT_Encoding encoding );
|
|
|
|
/**
|
|
* Get the number of character maps in this face.
|
|
*
|
|
* @return character map count.
|
|
*/
|
|
unsigned int CharMapCount();
|
|
|
|
/**
|
|
* Get a list of character maps in this face.
|
|
*
|
|
* @return pointer to the first encoding.
|
|
*/
|
|
FT_Encoding* CharMapList();
|
|
|
|
/**
|
|
* Set the char size for the current face.
|
|
*
|
|
* @param size the face size in points (1/72 inch)
|
|
* @param res the resolution of the target device.
|
|
* @return <code>true</code> if size was set correctly
|
|
*/
|
|
virtual bool FaceSize( const unsigned int size, const unsigned int res = 72);
|
|
|
|
/**
|
|
* Get the current face size in points.
|
|
*
|
|
* @return face size
|
|
*/
|
|
unsigned int FaceSize() const;
|
|
|
|
/**
|
|
* Set the extrusion distance for the font. Only implemented by
|
|
* FTGLExtrdFont
|
|
*
|
|
* @param depth The extrusion distance.
|
|
*/
|
|
virtual void Depth( float depth){}
|
|
|
|
/**
|
|
* Enable or disable the use of Display Lists inside FTGL
|
|
*
|
|
* @param useList <code>true</code> turns ON display lists.
|
|
* <code>false</code> turns OFF display lists.
|
|
*/
|
|
void UseDisplayList( bool useList);
|
|
|
|
/**
|
|
* Get the global ascender height for the face.
|
|
*
|
|
* @return Ascender height
|
|
*/
|
|
float Ascender() const;
|
|
|
|
/**
|
|
* Gets the global descender height for the face.
|
|
*
|
|
* @return Descender height
|
|
*/
|
|
float Descender() const;
|
|
|
|
/**
|
|
* Gets the line spacing for the font.
|
|
*
|
|
* @return Line height
|
|
*/
|
|
float LineHeight() const;
|
|
|
|
/**
|
|
* Get the bounding box for a string.
|
|
*
|
|
* @param string a char string
|
|
* @param llx lower left near x coord
|
|
* @param lly lower left near y coord
|
|
* @param llz lower left near z coord
|
|
* @param urx upper right far x coord
|
|
* @param ury upper right far y coord
|
|
* @param urz upper right far z coord
|
|
*/
|
|
void BBox( const char* string, float& llx, float& lly, float& llz, float& urx, float& ury, float& urz);
|
|
|
|
/**
|
|
* Get the bounding box for a string.
|
|
*
|
|
* @param string a wchar_t string
|
|
* @param llx lower left near x coord
|
|
* @param lly lower left near y coord
|
|
* @param llz lower left near z coord
|
|
* @param urx upper right far x coord
|
|
* @param ury upper right far y coord
|
|
* @param urz upper right far z coord
|
|
*/
|
|
void BBox( const wchar_t* string, float& llx, float& lly, float& llz, float& urx, float& ury, float& urz);
|
|
|
|
/**
|
|
* Get the advance width for a string.
|
|
*
|
|
* @param string a wchar_t string
|
|
* @return advance width
|
|
*/
|
|
float Advance( const wchar_t* string);
|
|
|
|
/**
|
|
* Get the advance width for a string.
|
|
*
|
|
* @param string a char string
|
|
* @return advance width
|
|
*/
|
|
float Advance( const char* string);
|
|
|
|
/**
|
|
* Render a string of characters
|
|
*
|
|
* @param string 'C' style string to be output.
|
|
*/
|
|
virtual void Render( const char* string );
|
|
|
|
/**
|
|
* Render a string of characters
|
|
*
|
|
* @param string wchar_t string to be output.
|
|
*/
|
|
virtual void Render( const wchar_t* string );
|
|
|
|
/**
|
|
* Queries the Font for errors.
|
|
*
|
|
* @return The current error code.
|
|
*/
|
|
FT_Error Error() const { return err;}
|
|
|
|
protected:
|
|
/**
|
|
* Construct a glyph of the correct type.
|
|
*
|
|
* Clients must overide the function and return their specialised
|
|
* FTGlyph.
|
|
*
|
|
* @param g The glyph index NOT the char code.
|
|
* @return An FT****Glyph or <code>null</code> on failure.
|
|
*/
|
|
virtual FTGlyph* MakeGlyph( unsigned int g) = 0;
|
|
|
|
/**
|
|
* Current face object
|
|
*/
|
|
FTFace face;
|
|
|
|
/**
|
|
* Current size object
|
|
*/
|
|
FTSize charSize;
|
|
|
|
/**
|
|
* Flag to enable or disable the use of Display Lists inside FTGL
|
|
* <code>true</code> turns ON display lists.
|
|
* <code>false</code> turns OFF display lists.
|
|
*/
|
|
bool useDisplayLists;
|
|
|
|
/**
|
|
* Current error code. Zero means no error.
|
|
*/
|
|
FT_Error err;
|
|
|
|
private:
|
|
/**
|
|
* Check that the glyph at <code>chr</code> exist. If not load it.
|
|
*
|
|
* @param chr character index
|
|
* @return <code>true</code> if the glyph can be created.
|
|
*/
|
|
inline bool CheckGlyph( const unsigned int chr);
|
|
|
|
/**
|
|
* An object that holds a list of glyphs
|
|
*/
|
|
FTGlyphContainer* glyphList;
|
|
|
|
/**
|
|
* Current pen or cursor position;
|
|
*/
|
|
FTPoint pen;
|
|
|
|
};
|
|
|
|
|
|
#endif // __FTFont__
|
|
|