af_autofitter_load_glyph( AF_Module module,
FT_GlyphSlot slot,
FT_Size size,
FT_UInt glyph_index,
FT_Int32 load_flags )
{
FT_Error error = FT_Err_Ok;
FT_Memory memory = module->root.library->memory;
#ifdef FT_DEBUG_AUTOFIT
/* in debug mode, we use a global object that survives this routine */
AF_GlyphHints hints = _af_debug_hints_rec;
AF_LoaderRec loader[1];
FT_UNUSED( size );
if ( hints->memory )
af_glyph_hints_done( hints );
af_glyph_hints_init( hints, memory );
af_loader_init( loader, hints );
error = af_loader_load_glyph( loader, module, slot->face,
glyph_index, load_flags );
af_glyph_hints_dump_points( hints, 0 );
af_glyph_hints_dump_segments( hints, 0 );
af_glyph_hints_dump_edges( hints, 0 );
af_loader_done( loader );
return error;
#else /* !FT_DEBUG_AUTOFIT */
AF_GlyphHintsRec hints[1];
AF_LoaderRec loader[1];
FT_UNUSED( size );
af_glyph_hints_init( hints, memory );
af_loader_init( loader, hints );
error = af_loader_load_glyph( loader, module, slot->face,
glyph_index, load_flags );
af_loader_done( loader );
af_glyph_hints_done( hints );
return error;
#endif /* !FT_DEBUG_AUTOFIT */
}
af_autofitter_done( FT_Module ft_module ) /* AF_Module */
{
FT_UNUSED( ft_module );
#ifdef FT_DEBUG_AUTOFIT
if ( _af_debug_hints_rec->memory )
af_glyph_hints_done( _af_debug_hints_rec );
#endif
}
af_loader_done( AF_Loader loader )
{
af_glyph_hints_done( &loader->hints );
loader->face = NULL;
loader->globals = NULL;
FT_GlyphLoader_Done( loader->gloader );
loader->gloader = NULL;
}
af_loader_done( AF_Loader loader )
{
af_glyph_hints_done( &loader->hints );
loader->face = NULL;
loader->globals = NULL;
#ifdef FT_DEBUG_AUTOFIT
_af_debug_hints = NULL;
#endif
FT_GlyphLoader_Done( loader->gloader );
loader->gloader = NULL;
}
af_latin_metrics_init_widths( AF_LatinMetrics metrics,
FT_Face face,
FT_ULong charcode )
{
/* scan the array of segments in each direction */
AF_GlyphHintsRec hints[1];
af_glyph_hints_init( hints, face->memory );
metrics->axis[AF_DIMENSION_HORZ].width_count = 0;
metrics->axis[AF_DIMENSION_VERT].width_count = 0;
{
FT_Error error;
FT_UInt glyph_index;
int dim;
AF_LatinMetricsRec dummy[1];
AF_Scaler scaler = &dummy->root.scaler;
glyph_index = FT_Get_Char_Index( face, charcode );
if ( glyph_index == 0 )
goto Exit;
error = FT_Load_Glyph( face, glyph_index, FT_LOAD_NO_SCALE );
if ( error || face->glyph->outline.n_points <= 0 )
goto Exit;
FT_ZERO( dummy );
dummy->units_per_em = metrics->units_per_em;
scaler->x_scale = scaler->y_scale = 0x10000L;
scaler->x_delta = scaler->y_delta = 0;
scaler->face = face;
scaler->render_mode = FT_RENDER_MODE_NORMAL;
scaler->flags = 0;
af_glyph_hints_rescale( hints, (AF_ScriptMetrics)dummy );
error = af_glyph_hints_reload( hints, &face->glyph->outline, 0 );
if ( error )
goto Exit;
for ( dim = 0; dim < AF_DIMENSION_MAX; dim++ )
{
AF_LatinAxis axis = &metrics->axis[dim];
AF_AxisHints axhints = &hints->axis[dim];
AF_Segment seg, limit, link;
FT_UInt num_widths = 0;
error = af_latin_hints_compute_segments( hints,
(AF_Dimension)dim );
if ( error )
goto Exit;
af_latin_hints_link_segments( hints,
(AF_Dimension)dim );
seg = axhints->segments;
limit = seg + axhints->num_segments;
for ( ; seg < limit; seg++ )
{
link = seg->link;
/* we only consider stem segments there! */
if ( link && link->link == seg && link > seg )
{
FT_Pos dist;
dist = seg->pos - link->pos;
if ( dist < 0 )
dist = -dist;
if ( num_widths < AF_LATIN_MAX_WIDTHS )
axis->widths[ num_widths++ ].org = dist;
}
}
af_sort_widths( num_widths, axis->widths );
axis->width_count = num_widths;
}
Exit:
for ( dim = 0; dim < AF_DIMENSION_MAX; dim++ )
{
AF_LatinAxis axis = &metrics->axis[dim];
FT_Pos stdw;
stdw = ( axis->width_count > 0 )
? axis->widths[0].org
: AF_LATIN_CONSTANT( metrics, 50 );
/* let's try 20% of the smallest width */
axis->edge_distance_threshold = stdw / 5;
axis->standard_width = stdw;
axis->extra_light = 0;
}
}
af_glyph_hints_done( hints );
}
