ref: 22a0cccb4d9d002f33c1ba7a4b36812c7d4f46b5
dir: /src/autofit/afindic.c/
/****************************************************************************
*
* afindic.c
*
* Auto-fitter hinting routines for Indic writing system (body).
*
* Copyright (C) 2007-2022 by
* Rahul Bhalerao <rahul.bhalerao@redhat.com>, <b.rahul.pm@gmail.com>.
*
* This file is part of the FreeType project, and may only be used,
* modified, and distributed under the terms of the FreeType project
* license, LICENSE.TXT. By continuing to use, modify, or distribute
* this file you indicate that you have read the license and
* understand and accept it fully.
*
*/
#include "aftypes.h"
#include "aflatin.h"
#include "afcjk.h"
#ifdef AF_CONFIG_OPTION_INDIC
#include "afindic.h"
#include "aferrors.h"
static FT_Error
af_indic_metrics_init( AF_CJKMetrics metrics,
FT_Face face )
{
/* skip blue zone init in CJK routines */
FT_CharMap oldmap = face->charmap;
metrics->units_per_em = face->units_per_EM;
if ( FT_Select_Charmap( face, FT_ENCODING_UNICODE ) )
face->charmap = NULL;
else
{
af_cjk_metrics_init_widths( metrics, face );
#if 0
/* either need indic specific blue_chars[] or just skip blue zones */
af_cjk_metrics_init_blues( metrics, face, af_cjk_blue_chars );
#endif
af_cjk_metrics_check_digits( metrics, face );
}
FT_Set_Charmap( face, oldmap );
return FT_Err_Ok;
}
static void
af_indic_metrics_scale( AF_CJKMetrics metrics,
AF_Scaler scaler )
{
/* use CJK routines */
af_cjk_metrics_scale( metrics, scaler );
}
static FT_Error
af_indic_hints_init( AF_GlyphHints hints,
AF_CJKMetrics metrics )
{
/* use CJK routines */
return af_cjk_hints_init( hints, metrics );
}
static FT_Error
af_indic_hints_apply( FT_UInt glyph_index,
AF_GlyphHints hints,
FT_Outline* outline,
AF_CJKMetrics metrics )
{
/* use CJK routines */
return af_cjk_hints_apply( glyph_index, hints, outline, metrics );
}
/* Extract standard_width from writing system/script specific */
/* metrics class. */
static void
af_indic_get_standard_widths( AF_CJKMetrics metrics,
FT_Pos* stdHW,
FT_Pos* stdVW )
{
if ( stdHW )
*stdHW = metrics->axis[AF_DIMENSION_VERT].standard_width;
if ( stdVW )
*stdVW = metrics->axis[AF_DIMENSION_HORZ].standard_width;
}
/*************************************************************************/
/*************************************************************************/
/***** *****/
/***** I N D I C S C R I P T C L A S S *****/
/***** *****/
/*************************************************************************/
/*************************************************************************/
AF_DEFINE_WRITING_SYSTEM_CLASS(
af_indic_writing_system_class,
AF_WRITING_SYSTEM_INDIC,
sizeof ( AF_CJKMetricsRec ),
(AF_WritingSystem_InitMetricsFunc) af_indic_metrics_init, /* style_metrics_init */
(AF_WritingSystem_ScaleMetricsFunc)af_indic_metrics_scale, /* style_metrics_scale */
(AF_WritingSystem_DoneMetricsFunc) NULL, /* style_metrics_done */
(AF_WritingSystem_GetStdWidthsFunc)af_indic_get_standard_widths, /* style_metrics_getstdw */
(AF_WritingSystem_InitHintsFunc) af_indic_hints_init, /* style_hints_init */
(AF_WritingSystem_ApplyHintsFunc) af_indic_hints_apply /* style_hints_apply */
)
#else /* !AF_CONFIG_OPTION_INDIC */
AF_DEFINE_WRITING_SYSTEM_CLASS(
af_indic_writing_system_class,
AF_WRITING_SYSTEM_INDIC,
sizeof ( AF_CJKMetricsRec ),
(AF_WritingSystem_InitMetricsFunc) NULL, /* style_metrics_init */
(AF_WritingSystem_ScaleMetricsFunc)NULL, /* style_metrics_scale */
(AF_WritingSystem_DoneMetricsFunc) NULL, /* style_metrics_done */
(AF_WritingSystem_GetStdWidthsFunc)NULL, /* style_metrics_getstdw */
(AF_WritingSystem_InitHintsFunc) NULL, /* style_hints_init */
(AF_WritingSystem_ApplyHintsFunc) NULL /* style_hints_apply */
)
#endif /* !AF_CONFIG_OPTION_INDIC */
/* END */