forked from enlightenment/efl
285 lines
7.7 KiB
C
285 lines
7.7 KiB
C
#include "evas_common.h"
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#include "evas_font_private.h"
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#include "evas_text_utils.h"
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#include "language/evas_bidi_utils.h"
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#include "language/evas_language_utils.h"
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#include "evas_font_ot.h"
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void
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evas_common_text_props_bidi_set(Evas_Text_Props *props,
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Evas_BiDi_Paragraph_Props *bidi_par_props, size_t start)
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{
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#ifdef BIDI_SUPPORT
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props->bidi.dir = (evas_bidi_is_rtl_char(
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bidi_par_props,
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0,
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start)) ? EVAS_BIDI_DIRECTION_RTL : EVAS_BIDI_DIRECTION_LTR;
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#else
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(void) start;
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(void) bidi_par_props;
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props->bidi.dir = EVAS_BIDI_DIRECTION_LTR;
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#endif
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}
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void
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evas_common_text_props_script_set(Evas_Text_Props *props,
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const Eina_Unicode *str)
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{
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props->script = evas_common_language_script_type_get(str);
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}
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void
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evas_common_text_props_content_copy_and_ref(Evas_Text_Props *dst,
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const Evas_Text_Props *src)
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{
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memcpy(dst, src, sizeof(Evas_Text_Props));
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evas_common_text_props_content_ref(dst);
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}
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void
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evas_common_text_props_content_ref(Evas_Text_Props *props)
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{
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props->info->refcount++;
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}
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void
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evas_common_text_props_content_unref(Evas_Text_Props *props)
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{
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/* We allow this, because sometimes we want to have props without info,
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* and we don't want to diverge the code paths too much. */
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if (!props->info)
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return;
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if (props->info->refcount == 0)
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{
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ERR("Trying to unref props with refount == 0");
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return;
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}
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if (--(props->info->refcount) == 0)
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{
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if (props->info->glyph)
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free(props->info->glyph);
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#ifdef OT_SUPPORT
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if (props->info->ot)
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free(props->info->ot);
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#endif
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free(props->info);
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props->info = NULL;
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}
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}
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/* Won't work in the middle of ligatures */
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EAPI void
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evas_common_text_props_split(Evas_Text_Props *base,
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Evas_Text_Props *ext, int cutoff)
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{
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evas_common_text_props_content_copy_and_ref(ext, base);
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if (base->bidi.dir == EVAS_BIDI_DIRECTION_RTL)
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{
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ext->start = base->start;
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ext->len = base->len - cutoff;
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base->start = (base->start + base->len) - cutoff;
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base->len = cutoff;
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#ifdef OT_SUPPORT
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ext->text_offset =
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ext->info->ot[ext->start + ext->len - 1].source_cluster;
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#else
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ext->text_offset = base->text_offset + base->len;
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#endif
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}
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else
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{
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ext->start = base->start + cutoff;
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ext->len = base->len - cutoff;
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base->len = cutoff;
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#ifdef OT_SUPPORT
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ext->text_offset = ext->info->ot[ext->start].source_cluster;
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#else
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ext->text_offset = base->text_offset + base->len;
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#endif
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}
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}
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/* Won't work in the middle of ligatures */
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EAPI void
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evas_common_text_props_merge(Evas_Text_Props *item1,
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const Evas_Text_Props *item2)
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{
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if (item1->info != item2->info)
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{
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ERR("tried merge back items that weren't together in the first place.");
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return;
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}
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if (item1->bidi.dir == EVAS_BIDI_DIRECTION_RTL)
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{
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item1->start = item2->start;
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}
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item1->len += item2->len;
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}
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EAPI Eina_Bool
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evas_common_text_props_content_create(void *_fn, const Eina_Unicode *text,
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Evas_Text_Props *text_props, int len)
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{
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RGBA_Font *fn = (RGBA_Font *) _fn;
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RGBA_Font_Int *fi;
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size_t char_index;
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if (text_props->info)
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{
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evas_common_text_props_content_unref(text_props);
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}
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text_props->info = calloc(1, sizeof(Evas_Text_Props_Info));
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fi = fn->fonts->data;
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/* evas_common_font_size_use(fn); */
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evas_common_font_int_reload(fi);
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if (fi->src->current_size != fi->size)
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{
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FTLOCK();
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FT_Activate_Size(fi->ft.size);
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FTUNLOCK();
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fi->src->current_size = fi->size;
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}
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#ifdef OT_SUPPORT
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evas_common_font_ot_populate_text_props(fn, text, text_props, len);
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/* Load the glyph according to the first letter of the script, preety
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* bad, but will have to do */
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{
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/* Skip common chars */
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const Eina_Unicode *tmp;
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for (tmp = text ;
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*tmp &&
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evas_common_language_char_script_get(*tmp) ==
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EVAS_SCRIPT_COMMON ;
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tmp++)
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;
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if (!*tmp && (tmp > text)) tmp--;
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evas_common_font_glyph_search(fn, &fi, *tmp);
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}
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for (char_index = 0 ; char_index < text_props->len ; char_index++)
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{
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FT_UInt index;
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RGBA_Font_Glyph *fg;
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index = text_props->info->glyph[char_index].index;
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LKL(fi->ft_mutex);
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fg = evas_common_font_int_cache_glyph_get(fi, index);
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if (!fg)
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{
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LKU(fi->ft_mutex);
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continue;
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}
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LKU(fi->ft_mutex);
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text_props->info->glyph[char_index].x_bear =
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fg->glyph_out->left;
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text_props->info->glyph[char_index].width =
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fg->glyph_out->bitmap.width;
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/* text_props->info->glyph[char_index].advance =
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* text_props->info->glyph[char_index].index =
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* already done by the ot function */
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if (EVAS_FONT_CHARACTER_IS_INVISIBLE(
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text[text_props->info->ot[char_index].source_cluster]))
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text_props->info->glyph[char_index].index = 0;
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}
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#else
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/* We are walking the string in visual ordering */
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Eina_Bool use_kerning;
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FT_UInt prev_index;
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FT_Face pface = NULL;
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int adv_d, i;
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FTLOCK();
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use_kerning = FT_HAS_KERNING(fi->src->ft.face);
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FTUNLOCK();
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prev_index = 0;
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i = len;
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text_props->info->glyph = calloc(len,
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sizeof(Evas_Font_Glyph_Info));
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if (text_props->bidi.dir == EVAS_BIDI_DIRECTION_RTL)
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{
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text += len - 1;
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adv_d = -1;
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}
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else
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{
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adv_d = 1;
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}
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char_index = 0;
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for ( ; i > 0 ; char_index++, text += adv_d, i--)
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{
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FT_UInt index;
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RGBA_Font_Glyph *fg;
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int _gl, kern;
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_gl = *text;
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if (_gl == 0) break;
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index = evas_common_font_glyph_search(fn, &fi, _gl);
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LKL(fi->ft_mutex);
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fg = evas_common_font_int_cache_glyph_get(fi, index);
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if (!fg)
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{
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LKU(fi->ft_mutex);
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continue;
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}
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kern = 0;
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if ((use_kerning) && (prev_index) && (index) &&
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(pface == fi->src->ft.face))
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{
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# ifdef BIDI_SUPPORT
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/* if it's rtl, the kerning matching should be reversed, */
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/* i.e prev index is now the index and the other way */
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/* around. There is a slight exception when there are */
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/* compositing chars involved.*/
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if (text_props &&
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(text_props->bidi.dir != EVAS_BIDI_DIRECTION_RTL))
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{
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if (evas_common_font_query_kerning(fi, index, prev_index, &kern))
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{
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text_props->info->glyph[char_index - 1].advance +=
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kern;
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}
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}
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else
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# endif
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{
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if (evas_common_font_query_kerning(fi, prev_index, index, &kern))
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{
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text_props->info->glyph[char_index - 1].advance +=
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kern;
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}
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}
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}
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pface = fi->src->ft.face;
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LKU(fi->ft_mutex);
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if (EVAS_FONT_CHARACTER_IS_INVISIBLE(_gl))
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text_props->info->glyph[char_index].index = 0;
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text_props->info->glyph[char_index].index = index;
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text_props->info->glyph[char_index].x_bear =
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fg->glyph_out->left;
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text_props->info->glyph[char_index].advance =
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fg->glyph->advance.x >> 10;
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text_props->info->glyph[char_index].width =
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fg->glyph_out->bitmap.width;
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prev_index = index;
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}
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text_props->len = len;
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#endif
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text_props->info->refcount = 1;
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return EINA_TRUE;
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}
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