LayoutEngine::LayoutEngine(const LEFontInstance *fontInstance,
le_int32 scriptCode,
le_int32 languageCode,
le_int32 typoFlags,
LEErrorCode &success)
: fHbFont(NULL), fHbBuffer(NULL), fTypoFlags(typoFlags)
{
if (LE_FAILURE(success)) {
return;
}
fHbBuffer = hb_buffer_create ();
if (fHbBuffer == hb_buffer_get_empty ()) {
success = LE_MEMORY_ALLOCATION_ERROR;
return;
}
hb_buffer_set_unicode_funcs (fHbBuffer, hb_icu_get_unicode_funcs ());
hb_buffer_set_script (fHbBuffer, hb_icu_script_to_script ((UScriptCode) scriptCode));
/* TODO set language */
hb_face_t *face = hb_face_create_for_tables (icu_le_hb_reference_table, (void *) fontInstance, NULL);
fHbFont = hb_font_create (face);
hb_face_destroy (face);
if (fHbFont == hb_font_get_empty ()) {
success = LE_MEMORY_ALLOCATION_ERROR;
return;
}
hb_font_set_funcs (fHbFont, icu_le_hb_get_font_funcs (), (void *) fontInstance, NULL);
hb_font_set_scale (fHbFont,
+from_float (fontInstance->getXPixelsPerEm () * fontInstance->getScaleFactorX ()),
-from_float (fontInstance->getYPixelsPerEm () * fontInstance->getScaleFactorY ()));
hb_font_set_ppem (fHbFont,
fontInstance->getXPixelsPerEm (),
fontInstance->getYPixelsPerEm ());
}
TagIncludedValue operator +(TagIncludedValue rhs) const {
switch (this->type()) {
case TYPE_FIXNUM:
switch (rhs.type()) {
case TYPE_FIXNUM: {
fixint_t l = fix2int(this->u.iv);
fixint_t r = fix2int(rhs.u.iv);
r = l + r;
return from_int(r);
}
break;
case TYPE_FLOAT: {
double lv = fix2int(this->u.iv);
Object *ro = rhs.u.obj;
return from_float(lv + ro->u.fv);
}
break;
default:
abort();
}
break;
case TYPE_FLOAT: {
Object *lo = this->u.obj;
switch (rhs.type()) {
case TYPE_FIXNUM: {
/* fl + fi */
fixint_t r = fix2int(rhs.u.iv);
double a = lo->u.fv + r;
return from_float(a);
}
break;
case TYPE_FLOAT: {
Object *ro = rhs.u.obj;
/* fl + fl */
return from_float(lo->u.fv + ro->u.fv);
}
break;
default:
abort(); // ??
break;
}
}
break;
default:
abort(); // ??
}
abort(); // ??
}
static hb_bool_t
icu_le_hb_font_get_glyph_contour_point (hb_font_t *font,
void *font_data,
hb_codepoint_t glyph,
unsigned int point_index,
hb_position_t *x,
hb_position_t *y,
void *user_data)
{
const LEFontInstance *fontInstance = (const LEFontInstance *) font_data;
LEPoint point;
if (!fontInstance->getGlyphPoint (glyph, point_index, point))
return false;
*x = from_float (point.fX);
*y = from_float (point.fY);
return true;
}
static hb_position_t
icu_le_hb_font_get_glyph_h_advance (hb_font_t *font,
void *font_data,
hb_codepoint_t glyph,
void *user_data)
{
const LEFontInstance *fontInstance = (const LEFontInstance *) font_data;
LEPoint advance;
fontInstance->getGlyphAdvance (glyph, advance);
return from_float (advance.fX);
}
/*
* Convert a object into another object
*/
Object *convert_object(Object *o, int type)
{
switch(get_type(o)) {
case T_INT :
return from_int(o, type);
case T_CHAR :
return from_char(o, type);
case T_STRING :
return from_string(o, type);
case T_FLOAT :
return from_float(o, type);
case T_BYTE_ARRAY :
return from_barray(o, type);
}
/* Invalid tyep specified */
return NULL;
}