afglobal.h File Reference

#include "aftypes.h"
#include "afmodule.h"
#include "afshaper.h"
#include "afscript.h"
#include "afstyles.h"

Include dependency graph for afglobal.h:

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Go to the source code of this file.

Classes
struct	AF_FaceGlobalsRec_

Macros
#define	SCRIPT(s, S, d, h, H, ss)    AF_DECLARE_SCRIPT_CLASS( af_ ## s ## _script_class )
#define	STYLE(s, S, d, ws, sc, ss, c)    AF_DECLARE_STYLE_CLASS( af_ ## s ## _style_class )
#define	AF_STYLE_FALLBACK   AF_STYLE_NONE_DFLT
#define	AF_SCRIPT_DEFAULT   AF_SCRIPT_LATN
#define	AF_STYLE_MASK   0x3FFF
#define	AF_STYLE_UNASSIGNED   AF_STYLE_MASK
#define	AF_DIGIT   0x8000U
#define	AF_NONBASE   0x4000U
#define	AF_PROP_INCREASE_X_HEIGHT_MIN   6
#define	AF_PROP_INCREASE_X_HEIGHT_MAX   0

Typedefs
typedef struct AF_FaceGlobalsRec_	AF_FaceGlobalsRec

Functions
	af_face_globals_new (FT_Face face, AF_FaceGlobals *aglobals, AF_Module module)
	af_face_globals_get_metrics (AF_FaceGlobals globals, FT_UInt gindex, FT_UInt options, AF_StyleMetrics *ametrics)
	af_face_globals_free (AF_FaceGlobals globals)
	af_face_globals_is_digit (AF_FaceGlobals globals, FT_UInt gindex)

Variables
FT_BEGIN_HEADER	af_writing_system_classes []
	af_script_classes []
	af_style_classes []

Macro Definition Documentation

AF_DIGIT

#define AF_DIGIT   0x8000U

Definition at line 82 of file afglobal.h.

AF_NONBASE

#define AF_NONBASE   0x4000U

Definition at line 84 of file afglobal.h.

AF_PROP_INCREASE_X_HEIGHT_MAX

#define AF_PROP_INCREASE_X_HEIGHT_MAX   0

Definition at line 88 of file afglobal.h.

AF_PROP_INCREASE_X_HEIGHT_MIN

#define AF_PROP_INCREASE_X_HEIGHT_MIN   6

Definition at line 87 of file afglobal.h.

AF_SCRIPT_DEFAULT

#define AF_SCRIPT_DEFAULT   AF_SCRIPT_LATN

Definition at line 74 of file afglobal.h.

AF_STYLE_FALLBACK

#define AF_STYLE_FALLBACK   AF_STYLE_NONE_DFLT

Definition at line 71 of file afglobal.h.

AF_STYLE_MASK

#define AF_STYLE_MASK   0x3FFF

Definition at line 77 of file afglobal.h.

AF_STYLE_UNASSIGNED

#define AF_STYLE_UNASSIGNED   AF_STYLE_MASK

Definition at line 79 of file afglobal.h.

SCRIPT

#define SCRIPT	(		s,
			S,
			d,
			h,
			H,
			ss
	)		AF_DECLARE_SCRIPT_CLASS( af_ ## s ## _script_class )

Definition at line 37 of file afglobal.h.

STYLE

#define STYLE	(		s,
			S,
			d,
			ws,
			sc,
			ss,
			c
	)		AF_DECLARE_STYLE_CLASS( af_ ## s ## _style_class )

Definition at line 47 of file afglobal.h.

Typedef Documentation

AF_FaceGlobalsRec

typedef struct AF_FaceGlobalsRec_ AF_FaceGlobalsRec

Function Documentation

af_face_globals_free()

af_face_globals_free

(

AF_FaceGlobals

globals

)

Definition at line 382 of file afglobal.c.

  {
    if ( globals )
    {
      FT_Memory  memory = globals->face->memory;
      FT_UInt    nn;
 
 
      for ( nn = 0; nn < AF_STYLE_MAX; nn++ )
      {
        if ( globals->metrics[nn] )
        {
          AF_StyleClass          style_class =
            af_style_classes[nn];
          AF_WritingSystemClass  writing_system_class =
            af_writing_system_classes[style_class->writing_system];
 
 
          if ( writing_system_class->style_metrics_done )
            writing_system_class->style_metrics_done( globals->metrics[nn] );
 
          FT_FREE( globals->metrics[nn] );
        }
      }
 
#ifdef FT_CONFIG_OPTION_USE_HARFBUZZ
      hb_font_destroy( globals->hb_font );
      hb_buffer_destroy( globals->hb_buf );
#endif
 
      /* no need to free `globals->glyph_styles'; */
      /* it is part of the `globals' array        */
      FT_FREE( globals );
    }
  }

Referenced by af_face_globals_new(), af_loader_reset(), and af_property_get_face_globals().

af_face_globals_get_metrics()

af_face_globals_get_metrics	(	AF_FaceGlobals	globals,
		FT_UInt	gindex,
		FT_UInt	options,
		AF_StyleMetrics *	ametrics
	)

Definition at line 420 of file afglobal.c.

  {
    AF_StyleMetrics  metrics = NULL;
 
    AF_Style               style = (AF_Style)options;
    AF_WritingSystemClass  writing_system_class;
    AF_StyleClass          style_class;
 
    FT_Error  error = FT_Err_Ok;
 
 
    if ( gindex >= (FT_ULong)globals->glyph_count )
    {
      error = FT_THROW( Invalid_Argument );
      goto Exit;
    }
 
    /* if we have a forced style (via `options'), use it, */
    /* otherwise look into `glyph_styles' array           */
    if ( style == AF_STYLE_NONE_DFLT || style + 1 >= AF_STYLE_MAX )
      style = (AF_Style)( globals->glyph_styles[gindex] &
                          AF_STYLE_UNASSIGNED           );
 
    style_class          = af_style_classes[style];
    writing_system_class = af_writing_system_classes
                             [style_class->writing_system];
 
    metrics = globals->metrics[style];
    if ( !metrics )
    {
      /* create the global metrics object if necessary */
      FT_Memory  memory = globals->face->memory;
 
 
      if ( FT_ALLOC( metrics, writing_system_class->style_metrics_size ) )
        goto Exit;
 
      metrics->style_class = style_class;
      metrics->globals     = globals;
 
      if ( writing_system_class->style_metrics_init )
      {
        error = writing_system_class->style_metrics_init( metrics,
                                                          globals->face );
        if ( error )
        {
          if ( writing_system_class->style_metrics_done )
            writing_system_class->style_metrics_done( metrics );
 
          FT_FREE( metrics );
          goto Exit;
        }
      }
 
      globals->metrics[style] = metrics;
    }
 
  Exit:
    *ametrics = metrics;
 
    return error;
  }

Referenced by af_loader_load_glyph().

af_face_globals_is_digit()

af_face_globals_is_digit	(	AF_FaceGlobals	globals,
		FT_UInt	gindex
	)

Definition at line 488 of file afglobal.c.

  {
    if ( gindex < (FT_ULong)globals->glyph_count )
      return FT_BOOL( globals->glyph_styles[gindex] & AF_DIGIT );
 
    return FT_BOOL( 0 );
  }

Referenced by af_loader_load_glyph().

af_face_globals_new()

af_face_globals_new	(	FT_Face	face,
		AF_FaceGlobals *	aglobals,
		AF_Module	module
	)

Definition at line 331 of file afglobal.c.

  {
    FT_Error        error;
    FT_Memory       memory;
    AF_FaceGlobals  globals = NULL;
 
 
    memory = face->memory;
 
    /* we allocate an AF_FaceGlobals structure together */
    /* with the glyph_styles array                      */
    if ( FT_ALLOC( globals,
                   sizeof ( *globals ) +
                     (FT_ULong)face->num_glyphs * sizeof ( FT_UShort ) ) )
      goto Exit;
 
    globals->face                      = face;
    globals->glyph_count               = face->num_glyphs;
    /* right after the globals structure come the glyph styles */
    globals->glyph_styles              = (FT_UShort*)( globals + 1 );
    globals->module                    = module;
    globals->stem_darkening_for_ppem   = 0;
    globals->darken_x                  = 0;
    globals->darken_y                  = 0;
    globals->standard_vertical_width   = 0;
    globals->standard_horizontal_width = 0;
    globals->scale_down_factor         = 0;
 
#ifdef FT_CONFIG_OPTION_USE_HARFBUZZ
    globals->hb_font = hb_ft_font_create( face, NULL );
    globals->hb_buf  = hb_buffer_create();
#endif
 
    error = af_face_globals_compute_style_coverage( globals );
    if ( error )
    {
      af_face_globals_free( globals );
      globals = NULL;
    }
    else
      globals->increase_x_height = AF_PROP_INCREASE_X_HEIGHT_MAX;
 
  Exit:
    *aglobals = globals;
    return error;
  }

Referenced by af_loader_reset(), and af_property_get_face_globals().

Variable Documentation

af_script_classes

af_script_classes[]

Definition at line 43 of file afglobal.h.

af_style_classes

af_style_classes[]

Definition at line 53 of file afglobal.h.

af_writing_system_classes

FT_BEGIN_HEADER af_writing_system_classes[]

Definition at line 33 of file afglobal.h.