static hb_script_t findScriptForVerticalGlyphSubstitution(hb_face_t* face) {
static const unsigned maxCount = 32;
unsigned scriptCount = maxCount;
hb_tag_t scriptTags[maxCount];
hb_ot_layout_table_get_script_tags(face, HB_OT_TAG_GSUB, 0, &scriptCount,
scriptTags);
for (unsigned scriptIndex = 0; scriptIndex < scriptCount; ++scriptIndex) {
unsigned languageCount = maxCount;
hb_tag_t languageTags[maxCount];
hb_ot_layout_script_get_language_tags(face, HB_OT_TAG_GSUB, scriptIndex, 0,
&languageCount, languageTags);
for (unsigned languageIndex = 0; languageIndex < languageCount;
++languageIndex) {
unsigned featureIndex;
if (hb_ot_layout_language_find_feature(
face, HB_OT_TAG_GSUB, scriptIndex, languageIndex,
HarfBuzzFace::vertTag, &featureIndex) ||
hb_ot_layout_language_find_feature(
face, HB_OT_TAG_GSUB, scriptIndex, languageIndex,
HarfBuzzFace::vrt2Tag, &featureIndex))
return hb_ot_tag_to_script(scriptTags[scriptIndex]);
}
}
return HB_SCRIPT_INVALID;
}
static hb_script_t findScriptForVerticalGlyphSubstitution(hb_face_t* face)
{
static const unsigned maxCount = 32;
unsigned scriptCount = maxCount;
hb_tag_t scriptTags[maxCount];
hb_ot_layout_table_get_script_tags(face, HB_OT_TAG_GSUB, 0, &scriptCount, scriptTags);
for (unsigned scriptIndex = 0; scriptIndex < scriptCount; ++scriptIndex) {
unsigned languageCount = maxCount;
hb_tag_t languageTags[maxCount];
hb_ot_layout_script_get_language_tags(face, HB_OT_TAG_GSUB, scriptIndex, 0, &languageCount, languageTags);
unsigned featureIndex;
for (unsigned languageIndex = 0; languageIndex < languageCount; ++languageIndex) {
if (hb_ot_layout_language_find_feature(face, HB_OT_TAG_GSUB, scriptIndex, languageIndex, HarfBuzzFace::vertTag, &featureIndex))
return hb_ot_tag_to_script(scriptTags[scriptIndex]);
}
// Try DefaultLangSys if all LangSys failed.
if (hb_ot_layout_language_find_feature(face, HB_OT_TAG_GSUB, scriptIndex, HB_OT_LAYOUT_DEFAULT_LANGUAGE_INDEX, HarfBuzzFace::vertTag, &featureIndex))
return hb_ot_tag_to_script(scriptTags[scriptIndex]);
}
return HB_SCRIPT_INVALID;
}
/**
* pango_ot_tag_to_script:
* @script_tag: A #PangoOTTag OpenType script tag
*
* Finds the #PangoScript corresponding to @script_tag.
*
* The 'DFLT' script tag is mapped to %PANGO_SCRIPT_COMMON.
*
* Note that an OpenType script tag may correspond to multiple
* #PangoScript values. In such cases, the #PangoScript value
* with the smallest value is returned.
* In particular, %PANGO_SCRIPT_HIRAGANA
* and %PANGO_SCRIPT_KATAKANA both map to the OT tag 'kana'.
* This function will return %PANGO_SCRIPT_HIRAGANA for
* 'kana'.
*
* Return value: #PangoScript corresponding to @script_tag or
* %PANGO_SCRIPT_UNKNOWN if none found.
*
* Since: 1.18
**/
PangoScript
pango_ot_tag_to_script (PangoOTTag script_tag)
{
return (PangoScript) hb_glib_script_from_script (hb_ot_tag_to_script ((hb_tag_t) script_tag));
}
int
layoutChars(XeTeXLayoutEngine engine, uint16_t chars[], int32_t offset, int32_t count, int32_t max,
bool rightToLeft)
{
bool res;
hb_script_t script = HB_SCRIPT_INVALID;
hb_direction_t direction = HB_DIRECTION_LTR;
hb_segment_properties_t segment_props;
hb_shape_plan_t *shape_plan;
hb_font_t* hbFont = engine->font->getHbFont();
hb_face_t* hbFace = hb_font_get_face(hbFont);
if (engine->font->getLayoutDirVertical())
direction = HB_DIRECTION_TTB;
else if (rightToLeft)
direction = HB_DIRECTION_RTL;
script = hb_ot_tag_to_script (engine->script);
if (hbUnicodeFuncs == NULL)
hbUnicodeFuncs = _get_unicode_funcs();
hb_buffer_reset(engine->hbBuffer);
hb_buffer_set_unicode_funcs(engine->hbBuffer, hbUnicodeFuncs);
hb_buffer_add_utf16(engine->hbBuffer, chars, max, offset, count);
hb_buffer_set_direction(engine->hbBuffer, direction);
hb_buffer_set_script(engine->hbBuffer, script);
hb_buffer_set_language(engine->hbBuffer, engine->language);
hb_buffer_guess_segment_properties(engine->hbBuffer);
hb_buffer_get_segment_properties(engine->hbBuffer, &segment_props);
if (engine->ShaperList == NULL) {
// HarfBuzz gives graphite2 shaper a priority, so that for hybrid
// Graphite/OpenType fonts, Graphite will be used. However, pre-0.9999
// XeTeX preferred OpenType over Graphite, so we are doing the same
// here for sake of backward compatibility.
engine->ShaperList = (char**) xcalloc(4, sizeof(char*));
engine->ShaperList[0] = (char*) "ot";
engine->ShaperList[1] = (char*) "graphite2";
engine->ShaperList[2] = (char*) "fallback";
engine->ShaperList[3] = NULL;
}
shape_plan = hb_shape_plan_create_cached(hbFace, &segment_props, engine->features, engine->nFeatures, engine->ShaperList);
res = hb_shape_plan_execute(shape_plan, hbFont, engine->hbBuffer, engine->features, engine->nFeatures);
if (res) {
engine->shaper = strdup(hb_shape_plan_get_shaper(shape_plan));
hb_buffer_set_content_type(engine->hbBuffer, HB_BUFFER_CONTENT_TYPE_GLYPHS);
} else {
// all selected shapers failed, retrying with default
// we don't use _cached here as the cached plain will always fail.
hb_shape_plan_destroy(shape_plan);
shape_plan = hb_shape_plan_create(hbFace, &segment_props, engine->features, engine->nFeatures, NULL);
res = hb_shape_plan_execute(shape_plan, hbFont, engine->hbBuffer, engine->features, engine->nFeatures);
if (res) {
engine->shaper = strdup(hb_shape_plan_get_shaper(shape_plan));
hb_buffer_set_content_type(engine->hbBuffer, HB_BUFFER_CONTENT_TYPE_GLYPHS);
} else {
fprintf(stderr, "\nERROR: all shapers failed\n");
exit(3);
}
}
hb_shape_plan_destroy(shape_plan);
int glyphCount = hb_buffer_get_length(engine->hbBuffer);
#ifdef DEBUG
char buf[1024];
unsigned int consumed;
printf ("shaper: %s\n", engine->shaper);
hb_buffer_serialize_flags_t flags = HB_BUFFER_SERIALIZE_FLAGS_DEFAULT;
hb_buffer_serialize_format_t format = HB_BUFFER_SERIALIZE_FORMAT_JSON;
hb_buffer_serialize_glyphs (engine->hbBuffer, 0, glyphCount, buf, sizeof(buf), &consumed, hbFont, format, flags);
if (consumed)
printf ("buffer glyphs: %s\n", buf);
#endif
return glyphCount;
}
