XeTeXLayoutEngine
createLayoutEngine(PlatformFontRef fontRef, XeTeXFont font, hb_tag_t script, char *language,
hb_feature_t* features, int nFeatures, char **shapers, uint32_t rgbValue,
float extend, float slant, float embolden)
{
XeTeXLayoutEngine result = new XeTeXLayoutEngine_rec;
result->fontRef = fontRef;
result->font = (XeTeXFontInst*)font;
result->script = script;
result->features = features;
result->ShaperList = shapers;
result->shaper = NULL;
result->nFeatures = nFeatures;
result->rgbValue = rgbValue;
result->extend = extend;
result->slant = slant;
result->embolden = embolden;
result->hbBuffer = hb_buffer_create();
// For Graphite fonts treat the language as BCP 47 tag, for OpenType we
// treat it as a OT language tag for backward compatibility with pre-0.9999
// XeTeX.
if (getReqEngine() == 'G')
result->language = hb_language_from_string(language, -1);
else
result->language = hb_ot_tag_to_language(hb_tag_from_string(language, -1));
free(language);
return result;
}
const char *
get_language_name_for_tag (guint32 tag)
{
hb_language_t lang;
const char *s;
lang = hb_ot_tag_to_language (tag);
s = hb_language_to_string (lang);
return get_language_name (pango_language_from_string (s));
}
/**
* pango_ot_tag_to_language:
* @language_tag: A #PangoOTTag OpenType language-system tag
*
* Finds a #PangoLanguage corresponding to @language_tag.
*
* Return value: #PangoLanguage best matching @language_tag or
* #PangoLanguage corresponding to the string "xx" if none found.
*
* Since: 1.18
**/
PangoLanguage *
pango_ot_tag_to_language (PangoOTTag language_tag)
{
return pango_language_from_string (hb_language_to_string (hb_ot_tag_to_language ((hb_tag_t) language_tag)));
}
JNIEXPORT jboolean JNICALL Java_sun_font_SunLayoutEngine_shape
(JNIEnv *env, jclass cls,
jobject font2D,
jobject fontStrike,
jfloat ptSize,
jfloatArray matrix,
jlong pFace,
jlong pNativeFont,
jboolean aat,
jcharArray text,
jobject gvdata,
jint script,
jint offset,
jint limit,
jint baseIndex,
jobject startPt,
jint flags,
jint slot) {
hb_buffer_t *buffer;
hb_face_t* hbface;
hb_font_t* hbfont;
jchar *chars;
jsize len;
int glyphCount;
hb_glyph_info_t *glyphInfo;
hb_glyph_position_t *glyphPos;
hb_direction_t direction = HB_DIRECTION_LTR;
hb_feature_t *features = NULL;
int featureCount = 0;
char* kern = (flags & TYPO_KERN) ? "kern" : "-kern";
char* liga = (flags & TYPO_LIGA) ? "liga" : "-liga";
jboolean ret;
unsigned int buflen;
JDKFontInfo *jdkFontInfo =
createJDKFontInfo(env, font2D, fontStrike, ptSize,
pNativeFont, matrix, aat);
if (!jdkFontInfo) {
return JNI_FALSE;
}
jdkFontInfo->env = env; // this is valid only for the life of this JNI call.
jdkFontInfo->font2D = font2D;
jdkFontInfo->fontStrike = fontStrike;
hbface = (hb_face_t*) jlong_to_ptr(pFace);
hbfont = hb_jdk_font_create(hbface, jdkFontInfo, NULL);
buffer = hb_buffer_create();
hb_buffer_set_script(buffer, getHBScriptCode(script));
hb_buffer_set_language(buffer,
hb_ot_tag_to_language(HB_OT_TAG_DEFAULT_LANGUAGE));
if ((flags & TYPO_RTL) != 0) {
direction = HB_DIRECTION_RTL;
}
hb_buffer_set_direction(buffer, direction);
hb_buffer_set_cluster_level(buffer,
HB_BUFFER_CLUSTER_LEVEL_MONOTONE_CHARACTERS);
chars = (*env)->GetCharArrayElements(env, text, NULL);
if ((*env)->ExceptionCheck(env)) {
hb_buffer_destroy(buffer);
hb_font_destroy(hbfont);
free((void*)jdkFontInfo);
return JNI_FALSE;
}
len = (*env)->GetArrayLength(env, text);
hb_buffer_add_utf16(buffer, chars, len, offset, limit-offset);
features = calloc(2, sizeof(hb_feature_t));
if (features) {
hb_feature_from_string(kern, -1, &features[featureCount++]);
hb_feature_from_string(liga, -1, &features[featureCount++]);
}
hb_shape_full(hbfont, buffer, features, featureCount, 0);
glyphCount = hb_buffer_get_length(buffer);
glyphInfo = hb_buffer_get_glyph_infos(buffer, 0);
glyphPos = hb_buffer_get_glyph_positions(buffer, &buflen);
ret = storeGVData(env, gvdata, slot, baseIndex, offset, startPt,
limit - offset, glyphCount, glyphInfo, glyphPos,
jdkFontInfo->devScale);
hb_buffer_destroy (buffer);
hb_font_destroy(hbfont);
free((void*)jdkFontInfo);
if (features != NULL) free(features);
(*env)->ReleaseCharArrayElements(env, text, chars, JNI_ABORT);
return ret;
}
