source: svn/newcon3bcm2_21bu/nexus/app/bgfx_font.h

/***************************************************************
**
** Broadcom Corp. Confidential
** Copyright 2002 Broadcom Corp. All Rights Reserved.
**
** THIS SOFTWARE MAY ONLY BE USED SUBJECT TO AN EXECUTED 
** SOFTWARE LICENSE AGREEMENT BETWEEN THE USER AND BROADCOM. 
** YOU HAVE NO RIGHT TO USE OR EXPLOIT THIS MATERIAL EXCEPT 
** SUBJECT TO THE TERMS OF SUCH AN AGREEMENT.
**
** Description: BGFX bit map font library
**
** Created: 8/22/2002 by Jeffrey P. Fisher
**
**
**
****************************************************************/

#ifndef __bgfx_font_h__
#define __bgfx_font_h__

#include "bgfx_types.h"

/* Uncomment to build with freetype support */
/* #define CONFIG_FREETYPE */

#ifdef CONFIG_FREETYPE
        #include <freetype/freetype.h>
        #include <freetype/ftglyph.h>
#endif /* CONFIG_FREETYPE */
/*
 * Definitions
 */

/* 
 * font flags
 */
#define BGFX_MONO            (1 << 0)
#define BGFX_CACHE_GLYPHS    (1 << 1)
#define BGFX_PRELOAD_GLYPHS  (1 << 2)


#ifdef __cplusplus
extern "C" {
#endif

/****************************************************************
* Initialize global font management structures.  
*               Called by bgfx_init. 
****************************************************************/
        int bgfx_font_init(void);
/****************************************************************
* Cleanup global font management structures.  
*               Called by bgfx_done. 
****************************************************************/
        void bgfx_font_done(void);

/****************************************************************
* Create a new font give an typeface name and size. 
*       The font_p should be a pointer to an allocated
*       but uninitialized bgfx_font_t structure.  The typeface must be 
*       a valid full path name to the font file.  Valid flags can be any 
*       combination of BGFX_MONO,BGFX_CACHE_GLYPHS and BGFX_PRELOAD_GLYPHS
*       REQUIRES FREETYPE SUPPORT
****************************************************************/
        int bgfx_new_font( bgfx_font_t *font_p,                         /* reference to allocated uninitialized bgfx_font_t structure */ 
                                                const char *typeface_name,      /* full path name of the typeface file */
                                                unsigned char height,           /* font size in pixels */
                                                unsigned long flags                     /* font format and handling flags */
                                          );
/****************************************************************
* Free all resources associated with the font 
*       It is important to free fonts when done using them to return memory
*       resources consumed by the font cache and Freetype.
****************************************************************/
        void bgfx_free_font( bgfx_font_t *font_p                        /* reference to initialized bgfx_font_t structure */
                                                );    

/****************************************************************
* Get a glyph from the glyph cache if it exists or by rendering it
* with Freetype 
*       The font_p should be a pointer to an initialized bgfx_font_t structure.
*       Called internally by bgfx.
****************************************************************/
        bgfx_glyph_t *bgfx_get_glyph(bgfx_font_t *font_p,       /* reference to initialized bgfx_font_t structure */ 
                                                                unsigned long a_char /* 32-bit unicode character */
                                                           );

/****************************************************************
* Calculate the width and height of the null terminated string. 
*               Calculate the bounding rectangle for the null terminated string.
****************************************************************/
        void bgfx_string_info(bgfx_font_t *font_p,                      /* initialized font structure */
                                                        const unsigned long *str_p, /* array of single 32-bit unicode characters */
                                                        int     str_len,                                /* number of 32-bit characters in string */
                                                        int *w,                                         /* width in pixels */
                                                        int *h                                          /* height in pixels */
                                                        );

/****************************************************************
* Load the entire set of font info and glyph cache from a file. 
*       The file must have been produced by the bgfx_save_font function.
*       This is the only way to draw text when there is no
*       Freetype support.
****************************************************************/
        int bgfx_load_font(bgfx_font_t *font_p,                         /* reference to initialized bgfx_font_t structure */
                                          void *file_p                                  /* open initialized file pointer to read font from */
                                          );

/****************************************************************
* External function required to load BGFX bitmap font files.
****************************************************************/
extern long bgfx_read(void *buffer, long size, long count, void *fp );

/****************************************************************
* External functions to lock and unlock access to global data structures
*               Required for freetype support only
****************************************************************/
#ifdef CONFIG_FREETYPE
extern void bgfx_lock(void);
extern void bgfx_unlock(void);
#endif /* CONFIG_FREETYPE */

#ifdef __cplusplus
}
#endif

#endif /* __bgfx_font_h__ */