/**
* @internal
* Calculate the kerning between "left" and "right.
*
* @param fi the font instance to use
* @param left the left glyph index
* @param right the right glyph index
* @param[out] kerning the kerning calculated.
* @return FALSE on error, TRUE on success.
*/
EAPI int
evas_common_font_query_kerning(RGBA_Font_Int *fi, FT_UInt left, FT_UInt right,
int *kerning)
{
int *result;
FT_Vector delta;
int key[2];
int error = 1;
key[0] = left;
key[1] = right;
result = eina_hash_find(fi->kerning, key);
if (result)
{
*kerning = result[2];
goto on_correct;
}
/* NOTE: ft2 seems to have a bug. and sometimes returns bizarre
* values to kern by - given same font, same size and same
* prev_index and index. auto/bytecode or none hinting doesn't
* matter */
evas_common_font_int_reload(fi);
FTLOCK();
if (FT_Get_Kerning(fi->src->ft.face,
key[0], key[1],
FT_KERNING_DEFAULT, &delta) == 0)
{
int *push;
FTUNLOCK();
*kerning = delta.x;
push = malloc(sizeof (int) * 3);
if (!push) return 1;
push[0] = key[0];
push[1] = key[1];
push[2] = *kerning;
eina_hash_direct_add(fi->kerning, push, push);
goto on_correct;
}
FTUNLOCK();
error = 0;
on_correct:
return error;
}
EAPI Eina_Bool
evas_common_text_props_content_create(void *_fi, const Eina_Unicode *text,
Evas_Text_Props *text_props, const Evas_BiDi_Paragraph_Props *par_props,
size_t par_pos, int len, Evas_Text_Props_Mode mode)
{
RGBA_Font_Int *fi = (RGBA_Font_Int *) _fi;
if (text_props->info)
{
evas_common_text_props_content_unref(text_props);
}
if (len == 0)
{
text_props->info = NULL;
text_props->start = text_props->len = text_props->text_offset = 0;
}
text_props->info = calloc(1, sizeof(Evas_Text_Props_Info));
if (text_props->font_instance != fi)
{
if (text_props->font_instance)
evas_common_font_int_unref(text_props->font_instance);
text_props->font_instance = fi;
fi->references++;
}
evas_common_font_int_reload(fi);
if (fi->src->current_size != fi->size)
{
evas_common_font_source_reload(fi->src);
FTLOCK();
FT_Activate_Size(fi->ft.size);
FTUNLOCK();
fi->src->current_size = fi->size;
}
text_props->changed = EINA_TRUE;
#ifdef OT_SUPPORT
(void) par_props;
(void) par_pos;
_content_create_ot(fi, text, text_props, len, mode);
#else
_content_create_regular(fi, text, text_props, par_props, par_pos, len, mode);
#endif
text_props->text_len = len;
text_props->info->refcount = 1;
return EINA_TRUE;
}
EAPI Eina_Bool
evas_common_text_props_content_create(void *_fi, const Eina_Unicode *text,
Evas_Text_Props *text_props, const Evas_BiDi_Paragraph_Props *par_props,
size_t par_pos, int len)
{
RGBA_Font_Int *fi = (RGBA_Font_Int *) _fi;
if (text_props->info)
{
evas_common_text_props_content_unref(text_props);
}
if (len == 0)
{
text_props->info = NULL;
text_props->start = text_props->len = text_props->text_offset = 0;
}
text_props->info = calloc(1, sizeof(Evas_Text_Props_Info));
text_props->font_instance = fi;
evas_common_font_int_reload(fi);
if (fi->src->current_size != fi->size)
{
FTLOCK();
FT_Activate_Size(fi->ft.size);
FTUNLOCK();
fi->src->current_size = fi->size;
}
#ifdef OT_SUPPORT
size_t char_index;
Evas_Font_Glyph_Info *gl_itr;
Evas_Coord pen_x = 0, adjust_x = 0;
(void) par_props;
(void) par_pos;
evas_common_font_ot_populate_text_props(text, text_props, len);
gl_itr = text_props->info->glyph;
for (char_index = 0 ; char_index < text_props->len ; char_index++)
{
FT_UInt idx;
RGBA_Font_Glyph *fg;
Eina_Bool is_replacement = EINA_FALSE;
/* If we got a malformed index, show the replacement char instead */
if (gl_itr->index == 0)
{
gl_itr->index = evas_common_get_char_index(fi, REPLACEMENT_CHAR);
is_replacement = EINA_TRUE;
}
idx = gl_itr->index;
LKL(fi->ft_mutex);
fg = evas_common_font_int_cache_glyph_get(fi, idx);
if (!fg)
{
LKU(fi->ft_mutex);
continue;
}
LKU(fi->ft_mutex);
gl_itr->x_bear = fg->glyph_out->left;
gl_itr->width = fg->glyph_out->bitmap.width;
/* text_props->info->glyph[char_index].advance =
* text_props->info->glyph[char_index].index =
* already done by the ot function */
if (EVAS_FONT_CHARACTER_IS_INVISIBLE(
text[text_props->info->ot[char_index].source_cluster]))
{
gl_itr->index = 0;
/* Reduce the current advance */
if (gl_itr > text_props->info->glyph)
{
adjust_x -= gl_itr->pen_after - (gl_itr - 1)->pen_after;
}
else
{
adjust_x -= gl_itr->pen_after;
}
}
else
{
if (is_replacement)
{
/* Update the advance accordingly */
adjust_x += (pen_x + (fg->glyph->advance.x >> 16)) -
gl_itr->pen_after;
}
pen_x = gl_itr->pen_after;
}
gl_itr->pen_after += adjust_x;
fi = text_props->font_instance;
gl_itr++;
}
#else
/* We are walking the string in visual ordering */
Evas_Font_Glyph_Info *gl_itr;
Eina_Bool use_kerning;
FT_UInt prev_index;
FT_Face pface = NULL;
Evas_Coord pen_x = 0;
int adv_d, i;
#if !defined(OT_SUPPORT) && defined(BIDI_SUPPORT)
Eina_Unicode *base_str = NULL;
if (text_props->bidi.dir == EVAS_BIDI_DIRECTION_RTL)
{
text = base_str = eina_unicode_strndup(text, len);
evas_bidi_shape_string(base_str, par_props, par_pos, len);
}
#else
(void) par_props;
(void) par_pos;
#endif
FTLOCK();
use_kerning = FT_HAS_KERNING(fi->src->ft.face);
FTUNLOCK();
prev_index = 0;
i = len;
text_props->info->glyph = calloc(len,
sizeof(Evas_Font_Glyph_Info));
if (text_props->bidi.dir == EVAS_BIDI_DIRECTION_RTL)
{
text += len - 1;
adv_d = -1;
}
else
{
adv_d = 1;
}
gl_itr = text_props->info->glyph;
for ( ; i > 0 ; gl_itr++, text += adv_d, i--)
{
FT_UInt idx;
RGBA_Font_Glyph *fg;
int _gl, kern;
Evas_Coord adv;
_gl = *text;
if (_gl == 0) break;
idx = evas_common_get_char_index(fi, _gl);
if (idx == 0)
{
idx = evas_common_get_char_index(fi, REPLACEMENT_CHAR);
}
LKL(fi->ft_mutex);
fg = evas_common_font_int_cache_glyph_get(fi, idx);
if (!fg)
{
LKU(fi->ft_mutex);
continue;
}
kern = 0;
if ((use_kerning) && (prev_index) && (idx) &&
(pface == fi->src->ft.face))
{
if (evas_common_font_query_kerning(fi, prev_index, idx, &kern))
{
pen_x += kern;
(gl_itr - 1)->pen_after +=
EVAS_FONT_ROUND_26_6_TO_INT(kern);
}
}
pface = fi->src->ft.face;
LKU(fi->ft_mutex);
gl_itr->index = idx;
gl_itr->x_bear = fg->glyph_out->left;
adv = fg->glyph->advance.x >> 10;
gl_itr->width = fg->glyph_out->bitmap.width;
if (EVAS_FONT_CHARACTER_IS_INVISIBLE(_gl))
{
gl_itr->index = 0;
}
else
{
pen_x += adv;
}
gl_itr->pen_after = EVAS_FONT_ROUND_26_6_TO_INT(pen_x);
prev_index = idx;
}
text_props->len = len;
# if !defined(OT_SUPPORT) && defined(BIDI_SUPPORT)
if (base_str)
free(base_str);
# endif
#endif
text_props->text_len = len;
text_props->info->refcount = 1;
return EINA_TRUE;
}
static inline void
_content_create_regular(RGBA_Font_Int *fi, const Eina_Unicode *text,
Evas_Text_Props *text_props, const Evas_BiDi_Paragraph_Props *par_props,
size_t par_pos, int len, Evas_Text_Props_Mode mode)
{
/* We are walking the string in visual ordering */
Evas_Font_Glyph_Info *gl_itr;
Eina_Bool use_kerning;
FT_UInt prev_index;
FT_Face pface = NULL;
Evas_Coord pen_x = 0;
int adv_d, i;
#if !defined(OT_SUPPORT) && defined(BIDI_SUPPORT)
Eina_Unicode *base_str = NULL;
if (mode == EVAS_TEXT_PROPS_MODE_SHAPE)
{
if (text_props->bidi.dir == EVAS_BIDI_DIRECTION_RTL)
{
text = base_str = eina_unicode_strndup(text, len);
evas_bidi_shape_string(base_str, par_props, par_pos, len);
}
}
#else
(void) mode;
(void) par_props;
(void) par_pos;
#endif
FTLOCK();
use_kerning = FT_HAS_KERNING(fi->src->ft.face);
FTUNLOCK();
prev_index = 0;
i = len;
text_props->info->glyph = calloc(len,
sizeof(Evas_Font_Glyph_Info));
if (text_props->bidi.dir == EVAS_BIDI_DIRECTION_RTL)
{
text += len - 1;
adv_d = -1;
}
else
{
adv_d = 1;
}
gl_itr = text_props->info->glyph;
for ( ; i > 0 ; gl_itr++, text += adv_d, i--)
{
FT_UInt idx;
RGBA_Font_Glyph *fg;
int _gl, kern;
Evas_Coord adv;
_gl = *text;
if (_gl == 0) break;
idx = evas_common_get_char_index(fi, _gl);
if (idx == 0)
{
idx = evas_common_get_char_index(fi, REPLACEMENT_CHAR);
}
fg = evas_common_font_int_cache_glyph_get(fi, idx);
if (!fg) continue;
kern = 0;
if ((use_kerning) && (prev_index) && (idx) &&
(pface == fi->src->ft.face))
{
if (evas_common_font_query_kerning(fi, prev_index, idx, &kern))
{
pen_x += kern;
(gl_itr - 1)->pen_after +=
EVAS_FONT_ROUND_26_6_TO_INT(kern);
}
}
pface = fi->src->ft.face;
gl_itr->index = idx;
gl_itr->x_bear = fg->x_bear;
gl_itr->y_bear = fg->y_bear;
adv = fg->glyph->advance.x >> 10;
gl_itr->width = fg->width;
if (EVAS_FONT_CHARACTER_IS_INVISIBLE(_gl))
{
gl_itr->index = 0;
}
else
{
pen_x += adv;
}
gl_itr->pen_after = EVAS_FONT_ROUND_26_6_TO_INT(pen_x);
prev_index = idx;
}
text_props->len = len;
# if !defined(OT_SUPPORT) && defined(BIDI_SUPPORT)
if (base_str)
free(base_str);
# endif
}
