/*
- * Copyright (C) 2011 Martin Hosken
- * Copyright (C) 2011 SIL International
+ * Copyright © 2011 Martin Hosken
+ * Copyright © 2011 SIL International
+ * Copyright © 2011 Google, Inc.
*
* This is part of HarfBuzz, a text shaping library.
*
* FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
* ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
* PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
+ *
+ * Google Author(s): Behdad Esfahbod
*/
#include "hb-private.hh"
#include <graphite2/Segment.h>
-typedef struct hbgr_tablelist_t {
- hb_blob_t *blob;
- struct hbgr_tablelist_t *next;
- unsigned int tag;
-} hbgr_tablelist_t;
-
-typedef struct hbgr_face_t {
- gr_face *grface;
- hbgr_tablelist_t *tlist;
- hb_destroy_func_t destroy;
- hb_reference_table_func_t get_table;
- hb_face_t *face;
- void *data;
-} hbgr_face_t;
-
-typedef struct hbgr_font_t {
- gr_font *grfont;
- hb_face_t *face;
- hb_font_t *font;
- hb_destroy_func_t destroy;
- hb_font_funcs_t *klass;
- void *data;
-} hbgr_font_t;
-
-typedef struct hbgr_cluster_t {
- unsigned int base_char;
- unsigned int num_chars;
- unsigned int base_glyph;
- unsigned int num_glyphs;
-} hbgr_cluster_t;
-
-static const void *hbgr_get_table(const void *face, unsigned int tag, size_t *len);
-static float hbgr_get_advance(const void *font, unsigned short gid);
-static void hbgr_face_destroy(void *data);
-static hb_blob_t *hbgr_face_get_table(hb_face_t *face, hb_tag_t tag, void *data);
-static void hbgr_font_destroy(void *data);
-/* static hb_codepoint_t hbgr_font_get_glyph (hb_font_t *font, hb_face_t *face, const void *user_data, hb_codepoint_t unicode, hb_codepoint_t variation_selector);
-static void hbgr_font_get_glyph_advance (hb_font_t *font, hb_face_t *face, const void *user_data, hb_codepoint_t glyph, hb_position_t *x_advance, hb_position_t *y_advance);
-static void hbgr_font_get_glyph_extents (hb_font_t *font, hb_face_t *face, const void *user_data, hb_codepoint_t glyph, hb_glyph_extents_t *extents);
-static hb_bool_t hbgr_font_get_contour_point (hb_font_t *font, hb_face_t *face, const void *user_data, unsigned int point_index, hb_codepoint_t glyph, hb_position_t *x, hb_position_t *y);
-static hb_position_t hbgr_font_get_kerning (hb_font_t *font, hb_face_t *face, const void *user_data, hb_codepoint_t first_glyph, hb_codepoint_t second_glyph);
-*/
-
-static const void *hbgr_get_table(const void *data, unsigned int tag, size_t *len)
-{
- const void *res;
- hbgr_tablelist_t *pl, *p;
- hbgr_face_t *face = (hbgr_face_t *)data;
- hbgr_tablelist_t *tlist = face->tlist;
-
- for (p = tlist; p; p = p->next)
- if (p->tag == tag)
- return hb_blob_get_data(p->blob, (unsigned int *)len);
- else
- pl = p;
-
- hb_blob_t *blob = face->get_table(face->face, tag, face->data);
- if (pl->blob)
- {
- p = (hbgr_tablelist_t *)malloc(sizeof(hbgr_tablelist_t));
- if (!p)
- {
- hb_blob_destroy(blob);
- return NULL;
- }
- p->next = NULL;
- pl->next = p;
- pl = p;
- }
- pl->blob = blob;
- pl->tag = tag;
- return hb_blob_get_data(blob, (unsigned int *)len);
-}
+struct hb_gr_cluster_t {
+ unsigned int base_char;
+ unsigned int num_chars;
+ unsigned int base_glyph;
+ unsigned int num_glyphs;
+};
-static float hbgr_get_advance(const void *dat, unsigned short gid)
-{
- hbgr_font_t *font = (hbgr_font_t *)dat;
- return (float)(font->klass->get.glyph_h_advance(font->font, font->data, gid, font->klass->user_data.glyph_h_advance));
-}
-static void hbgr_face_destroy(void *data)
-{
- hbgr_face_t *fcomp = (hbgr_face_t *)data;
- hbgr_tablelist_t *tlist = fcomp->tlist;
- while (tlist)
- {
- hbgr_tablelist_t *old = tlist;
- hb_blob_destroy(tlist->blob);
- tlist = tlist->next;
- free(old);
- }
- fcomp->destroy(fcomp->data);
- gr_face_destroy(fcomp->grface);
-}
+typedef struct hb_gr_tablelist_t {
+ hb_blob_t *blob;
+ struct hb_gr_tablelist_t *next;
+ unsigned int tag;
+} hb_gr_tablelist_t;
-static hb_blob_t *hbgr_face_get_table(hb_face_t *face, hb_tag_t tag, void *data)
-{
- hbgr_face_t *fcomp = (hbgr_face_t *)data;
- return fcomp->get_table(fcomp->face, tag, fcomp->data);
-}
+static struct hb_gr_face_data_t {
+ hb_face_t *face;
+ gr_face *grface;
+ hb_gr_tablelist_t *tlist;
+} _hb_gr_face_data_nil = {NULL, NULL};
-static void hbgr_font_destroy(void *data)
-{
- hbgr_font_t *fcomp = (hbgr_font_t *)data;
- fcomp->destroy(fcomp->data);
- gr_font_destroy(fcomp->grfont);
-}
+static struct hb_gr_font_data_t {
+ hb_font_t *font;
+ gr_font *grfont;
+ gr_face *grface;
+} _hb_gr_font_data_nil = {NULL, NULL, NULL};
-static hb_bool_t hbgr_font_get_glyph (hb_font_t *font,
- void *font_data,
- hb_codepoint_t unicode,
- hb_codepoint_t variation_selector,
- hb_codepoint_t *glyph,
- void *user_data)
-{
- return ((hbgr_font_t *)font)->klass->get.glyph(((hbgr_font_t *)font)->font, font_data, unicode, variation_selector, glyph, user_data);
-}
-static hb_bool_t hbgr_font_get_glyph_h_advance (hb_font_t *font,
- void *font_data,
- hb_codepoint_t glyph,
- void *user_data)
+static const void *hb_gr_get_table (const void *data, unsigned int tag, size_t *len)
{
- return ((hbgr_font_t *)font)->klass->get.glyph_h_advance(((hbgr_font_t *)font)->font, font_data, glyph, user_data);
+ hb_gr_tablelist_t *pl = NULL, *p;
+ hb_gr_face_data_t *face = (hb_gr_face_data_t *) data;
+ hb_gr_tablelist_t *tlist = face->tlist;
+
+ for (p = tlist; p; p = p->next)
+ if (p->tag == tag ) {
+ unsigned int tlen;
+ const char *d = hb_blob_get_data (p->blob, &tlen);
+ *len = tlen;
+ return d;
+ } else
+ pl = p;
+
+ if (!face->face)
+ return NULL;
+ hb_blob_t *blob = hb_face_reference_table (face->face, tag);
+
+ if (!pl || pl->blob)
+ {
+ p = (hb_gr_tablelist_t *) malloc (sizeof (hb_gr_tablelist_t));
+ if (!p) {
+ hb_blob_destroy(blob);
+ return NULL;
+ }
+ p->next = NULL;
+ if (pl)
+ pl->next = p;
+ else
+ face->tlist = p;
+ pl = p;
+ }
+ pl->blob = blob;
+ pl->tag = tag;
+
+ unsigned int tlen;
+ const char *d = hb_blob_get_data (blob, &tlen);
+ *len = tlen;
+ return d;
}
-static hb_position_t hbgr_font_get_glyph_v_advance (hb_font_t *font,
- void *font_data,
- hb_codepoint_t glyph,
- void *user_data)
+static float hb_gr_get_advance (const void *data, unsigned short gid)
{
- return ((hbgr_font_t *)font)->klass->get.glyph_v_advance(((hbgr_font_t *)font)->font, font_data, glyph, user_data);
+ hb_gr_font_data_t *font = (hb_gr_font_data_t *) data;
+ if (!font->font)
+ return 0;
+ return (float) hb_font_get_glyph_h_advance (font->font, gid);
}
-static hb_bool_t hbgr_font_get_glyph_h_origin (hb_font_t *font,
- void *font_data,
- hb_codepoint_t glyph,
- hb_position_t *x,
- hb_position_t *y,
- void *user_data)
+static void _hb_gr_face_data_destroy (void *data)
{
- return ((hbgr_font_t *)font)->klass->get.glyph_h_origin(((hbgr_font_t *)font)->font, font_data, glyph, x, y, user_data);
+ hb_gr_face_data_t *f = (hb_gr_face_data_t *) data;
+ hb_gr_tablelist_t *tlist = f->tlist;
+ while (tlist)
+ {
+ hb_gr_tablelist_t *old = tlist;
+ hb_blob_destroy (tlist->blob);
+ tlist = tlist->next;
+ free(old);
+ }
+ gr_face_destroy (f->grface);
}
-static hb_bool_t hbgr_font_get_glyph_v_origin (hb_font_t *font,
- void *font_data,
- hb_codepoint_t glyph,
- hb_position_t *x,
- hb_position_t *y,
- void *user_data)
+static void _hb_gr_font_data_destroy (void *data)
{
- return ((hbgr_font_t *)font)->klass->get.glyph_v_origin(((hbgr_font_t *)font)->font, font_data, glyph, x, y, user_data);
-}
+ hb_gr_font_data_t *f = (hb_gr_font_data_t *) data;
-static hb_position_t hbgr_font_get_glyph_h_kerning (hb_font_t *font,
- void *font_data,
- hb_codepoint_t first_glyph,
- hb_codepoint_t second_glyph,
- void *user_data)
-{
- return ((hbgr_font_t *)font)->klass->get.glyph_h_kerning(((hbgr_font_t *)font)->font, font_data, first_glyph, second_glyph, user_data);
+ gr_font_destroy (f->grfont);
}
-static hb_position_t hbgr_font_get_glyph_v_kerning (hb_font_t *font,
- void *font_data,
- hb_codepoint_t first_glyph,
- hb_codepoint_t second_glyph,
- void *user_data)
-{
- return ((hbgr_font_t *)font)->klass->get.glyph_v_kerning(((hbgr_font_t *)font)->font, font_data, first_glyph, second_glyph, user_data);
-}
+static hb_user_data_key_t hb_gr_data_key;
-static hb_bool_t hbgr_font_get_glyph_extents (hb_font_t *font,
- void *font_data,
- hb_codepoint_t glyph,
- hb_glyph_extents_t *extents,
- void *user_data)
+static hb_gr_face_data_t *
+_hb_gr_face_get_data (hb_face_t *face)
{
- return ((hbgr_font_t *)font)->klass->get.glyph_extents(((hbgr_font_t *)font)->font, font_data, glyph, extents, user_data);
+ hb_gr_face_data_t *data = (hb_gr_face_data_t *) hb_face_get_user_data (face, &hb_gr_data_key);
+ if (likely (data)) return data;
+
+ data = (hb_gr_face_data_t *) calloc (1, sizeof (hb_gr_face_data_t));
+ if (unlikely (!data))
+ return &_hb_gr_face_data_nil;
+
+
+ hb_blob_t *silf_blob = hb_face_reference_table (face, HB_GRAPHITE_TAG_Silf);
+ if (!hb_blob_get_length(silf_blob))
+ {
+ hb_blob_destroy(silf_blob);
+ return &_hb_gr_face_data_nil;
+ }
+
+ data->face = face;
+ data->grface = gr_make_face (data, &hb_gr_get_table, gr_face_preloadGlyphs);
+
+
+ if (unlikely (!hb_face_set_user_data (face, &hb_gr_data_key, data,
+ (hb_destroy_func_t) _hb_gr_face_data_destroy,
+ FALSE)))
+ {
+ _hb_gr_face_data_destroy (data);
+ data = (hb_gr_face_data_t *) hb_face_get_user_data (face, &hb_gr_data_key);
+ if (data)
+ return data;
+ else
+ return &_hb_gr_face_data_nil;
+ }
+
+ return data;
}
-static hb_bool_t hbgr_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)
+static hb_gr_font_data_t *
+_hb_gr_font_get_data (hb_font_t *font)
{
- return ((hbgr_font_t *)font)->klass->get.glyph_contour_point(((hbgr_font_t *)font)->font, font_data, glyph, point_index, x, y, user_data);
+ hb_gr_font_data_t *data = (hb_gr_font_data_t *) hb_font_get_user_data (font, &hb_gr_data_key);
+ if (likely (data)) return data;
+
+ data = (hb_gr_font_data_t *) calloc (1, sizeof (hb_gr_font_data_t));
+ if (unlikely (!data))
+ return &_hb_gr_font_data_nil;
+
+
+ hb_blob_t *silf_blob = hb_face_reference_table (font->face, HB_GRAPHITE_TAG_Silf);
+ if (!hb_blob_get_length (silf_blob))
+ {
+ hb_blob_destroy(silf_blob);
+ return &_hb_gr_font_data_nil;
+ }
+
+ data->font = font;
+ data->grface = _hb_gr_face_get_data (font->face)->grface;
+ int scale;
+ hb_font_get_scale (font, &scale, NULL);
+ data->grfont = gr_make_font_with_advance_fn (scale, data, &hb_gr_get_advance, data->grface);
+
+
+ if (unlikely (!hb_font_set_user_data (font, &hb_gr_data_key, data,
+ (hb_destroy_func_t) _hb_gr_font_data_destroy,
+ FALSE)))
+ {
+ _hb_gr_font_data_destroy (data);
+ data = (hb_gr_font_data_t *) hb_font_get_user_data (font, &hb_gr_data_key);
+ if (data)
+ return data;
+ else
+ return &_hb_gr_font_data_nil;
+ }
+
+ return data;
}
-hb_font_funcs_t hbgr_klass = {
- HB_OBJECT_HEADER_STATIC,
- TRUE,
- {
- hbgr_font_get_glyph,
- hbgr_font_get_glyph_h_advance,
- hbgr_font_get_glyph_v_advance,
- hbgr_font_get_glyph_h_origin,
- hbgr_font_get_glyph_v_origin,
- hbgr_font_get_glyph_h_kerning,
- hbgr_font_get_glyph_v_kerning,
- hbgr_font_get_glyph_extents,
- hbgr_font_get_glyph_contour_point
- }
-};
-// returns 0 = success, 1 = fallback
-static int hbgr_make_fonts(hb_font_t *font, hb_face_t *face)
+hb_bool_t
+hb_graphite_shape (hb_font_t *font,
+ hb_buffer_t *buffer,
+ const hb_feature_t *features,
+ unsigned int num_features,
+ const char * const *shaper_options)
{
- // check face for having already added gr_face (based on destroy fn)
- if (face->destroy != &hbgr_face_destroy)
- {
- hb_blob_t *silf_blob;
- silf_blob = hb_face_reference_table (font->face, HB_GRAPHITE_TAG_Silf);
- if (!hb_blob_get_length(silf_blob)) // return as early as possible if no Silf table
- {
- hb_blob_destroy(silf_blob);
- return 1;
- }
- hbgr_tablelist_t *flist = (hbgr_tablelist_t *)malloc(sizeof(hbgr_tablelist_t));
- hbgr_face_t *fcomp = (hbgr_face_t *)malloc(sizeof(hbgr_face_t));
- if (!flist || !fcomp) return 1;
- flist->next = NULL;
- flist->tag = 0;
- flist->blob = NULL;
- fcomp->tlist = flist;
- fcomp->get_table = face->reference_table;
- fcomp->destroy = face->destroy;
- fcomp->data = face->user_data;
- fcomp->grface = gr_make_face(fcomp, &hbgr_get_table, gr_face_preloadGlyphs);
- if (fcomp->grface)
- {
- face->user_data = fcomp;
- face->reference_table = &hbgr_face_get_table;
- face->destroy = &hbgr_face_destroy;
- }
- else
- {
- free(flist);
- free(fcomp);
- return 1;
- }
- }
- // check font for having already added gr_font (based on destroy fn)
- if (font->destroy != &hbgr_font_destroy)
+ buffer->guess_properties ();
+
+ hb_gr_font_data_t *data = _hb_gr_font_get_data (font);
+
+ unsigned int charlen;
+ hb_glyph_info_t *bufferi = hb_buffer_get_glyph_infos (buffer, &charlen);
+
+ int success = 0;
+
+ if (!charlen) return TRUE;
+
+ /* XXX(behdad): Do we need OT lang tag here? */
+ const char *lang = hb_language_to_string (hb_buffer_get_language (buffer));
+ gr_feature_val *feats = gr_face_featureval_for_lang (data->grface, lang ? hb_tag_from_string (lang) : 0);
+
+ while (num_features--)
+ {
+ const gr_feature_ref *fref = gr_face_find_fref (data->grface, features->tag);
+ if (fref)
+ gr_fref_set_feature_value (fref, features->value, feats);
+ features++;
+ }
+
+ unsigned short *gids = NULL;
+ hb_gr_cluster_t *clusters = NULL;
+ gr_segment *seg = NULL;
+ uint32_t *text = NULL;
+ unsigned short *pg;
+ const gr_slot *is;
+ unsigned int ci = 0, ic = 0;
+ float curradvx = 0., curradvy = 0.;
+ unsigned int glyphlen = 0;
+ unsigned int *p;
+
+ text = (uint32_t *) malloc ((charlen + 1) * sizeof (uint32_t));
+ if (!text) goto dieout;
+
+ p = text;
+ for (unsigned int i = 0; i < charlen; ++i)
+ *p++ = bufferi++->codepoint;
+ *p = 0;
+
+ hb_tag_t script_tag[2];
+ hb_ot_tags_from_script (hb_buffer_get_script(buffer), &script_tag[0], &script_tag[1]);
+
+ seg = gr_make_seg (data->grfont, data->grface,
+ script_tag[1] == HB_TAG_NONE ? script_tag[0] : script_tag[1],
+ feats,
+ gr_utf32, text, charlen,
+ 2 | (hb_buffer_get_direction(buffer) == HB_DIRECTION_RTL ? 1 : 0));
+ if (!seg) goto dieout;
+
+ glyphlen = gr_seg_n_slots (seg);
+ clusters = (hb_gr_cluster_t *) calloc (charlen, sizeof (hb_gr_cluster_t));
+ if (!glyphlen || !clusters) goto dieout;
+
+ gids = (unsigned short *) malloc (glyphlen * sizeof (unsigned short));
+ if (!gids) goto dieout;
+
+ pg = gids;
+ for (is = gr_seg_first_slot (seg), ic = 0; is; is = gr_slot_next_in_segment (is), ic++)
+ {
+ unsigned int before = gr_slot_before (is);
+ unsigned int after = gr_slot_after (is);
+ *pg = gr_slot_gid (is);
+ *pg = hb_be_uint16 (*pg); // XXX insane: swap bytes so be16 can swap them back
+ pg++;
+ while (clusters[ci].base_char > before && ci)
{
- hbgr_font_t *fcomp = (hbgr_font_t *)malloc(sizeof(hbgr_font_t));
- if (fcomp)
- {
- int scale;
- gr_face *grface = ((hbgr_face_t *)(face->user_data))->grface;
- hb_font_get_scale(font, &scale, NULL);
- fcomp->face = face;
- fcomp->font = font;
- fcomp->destroy = font->destroy;
- fcomp->klass = font->klass;
- fcomp->data = font->user_data;
- fcomp->grfont = gr_make_font_with_advance_fn(scale, fcomp, &hbgr_get_advance, grface);
- if (fcomp->grfont)
- {
- font->destroy = &hbgr_font_destroy;
- font->klass = &hbgr_klass;
- font->user_data = fcomp;
- return 0;
- }
- }
- // something went wrong, back out of the whole thing
- hbgr_face_t *facecomp = (hbgr_face_t *)(face->user_data);
- free(facecomp->tlist);
- face->reference_table = facecomp->get_table;
- face->destroy = facecomp->destroy;
- face->user_data = facecomp->data;
- free(facecomp);
- if (fcomp) free(fcomp);
- return 1;
- // create gr_font and put into struct along with stuff in font
- // replace font component with struct and fns
+ clusters[ci-1].num_chars += clusters[ci].num_chars;
+ clusters[ci-1].num_glyphs += clusters[ci].num_glyphs;
+ --ci;
}
- return 0;
-}
-
-hb_bool_t hb_graphite_shape (hb_font_t *font,
- hb_buffer_t *buffer,
- const hb_feature_t *features,
- unsigned int num_features,
- const char * const *shaper_options)
-{
- hb_face_t *face = font->face;
- gr_face *grface = NULL;
- gr_font *grfont = NULL;
- gr_segment *seg = NULL;
- unsigned int *text = NULL;
- hbgr_cluster_t *clusters = NULL;
- unsigned short *gids = NULL;
- unsigned int charlen;
- hb_glyph_info_t *bufferi = hb_buffer_get_glyph_infos(buffer, &charlen);
-
- int success = 0;
- unsigned int *p;
- const gr_slot *is;
- unsigned int glyphlen;
- unsigned short *pg;
- unsigned int ci = 0, ic = 0;
- float curradvx = 0., curradvy = 0.;
-
- if (!charlen || hbgr_make_fonts(font, face)) return 0;
- grface = ((hbgr_face_t *)face->user_data)->grface;
- grfont = ((hbgr_font_t *)font->user_data)->grfont;
-
- const char *lang = hb_language_to_string(hb_buffer_get_language(buffer));
- gr_feature_val *feats = gr_face_featureval_for_lang(grface, lang ? hb_tag_from_string(lang) : 0);
-
- while (num_features--)
- {
- const gr_feature_ref *fref = gr_face_find_fref(grface, features->tag);
- if (fref)
- gr_fref_set_feature_value(fref, features->value, feats);
- features++;
- }
- text = (unsigned int *)malloc((charlen + 1) * sizeof(unsigned int));
- if (!text) goto dieout;
- p = text;
- for (unsigned int i = 0; i < charlen; ++i)
- *p++ = bufferi++->codepoint;
- *p = 0;
-
- hb_tag_t script_tag_1, script_tag_2;
- hb_ot_tags_from_script(hb_buffer_get_script(buffer), &script_tag_1, &script_tag_2);
- seg = gr_make_seg(grfont, grface, script_tag_2 == HB_TAG_NONE ? script_tag_1 : script_tag_2,
- feats, gr_utf32, text, charlen, hb_buffer_get_direction(buffer) == HB_DIRECTION_RTL ? 3 : 0);
- if (!seg) goto dieout;
- glyphlen = gr_seg_n_slots(seg);
- clusters = (hbgr_cluster_t *)malloc(charlen * sizeof(hbgr_cluster_t));
- if (!glyphlen || !clusters) goto dieout;
- memset(clusters, 0, charlen * sizeof(hbgr_cluster_t));
- gids = (unsigned short *)malloc(glyphlen * sizeof(unsigned short));
- if (!gids) goto dieout;
- pg = gids;
- for (is = gr_seg_first_slot(seg), ic = 0; is; is = gr_slot_next_in_segment(is), ic++)
- {
- unsigned int before = gr_slot_before(is);
- unsigned int after = gr_slot_after(is);
- *pg = gr_slot_gid(is);
- *pg++ = hb_be_uint16(*pg); // insane: swap bytes so be16 can swap them back
- while (clusters[ci].base_char > before && ci)
- {
- clusters[ci-1].num_chars += clusters[ci].num_chars;
- clusters[ci-1].num_glyphs += clusters[ci].num_glyphs;
- --ci;
- }
-
- if (gr_slot_can_insert_before(is) && clusters[ci].num_chars && before >= clusters[ci].base_char + clusters[ci].num_chars)
- {
- hbgr_cluster_t *c = clusters + ci + 1;
- c->base_char = clusters[ci].base_char + clusters[ci].num_chars;
- c->num_chars = before - c->base_char;
- c->base_glyph = ic;
- c->num_glyphs = 0;
- ++ci;
- }
- ++clusters[ci].num_glyphs;
-
- if (clusters[ci].base_char + clusters[ci].num_chars < after + 1)
- clusters[ci].num_chars = after + 1 - clusters[ci].base_char;
- }
-
- buffer->clear_output();
- for (unsigned int i = 0; i <= ci; ++i)
- buffer->replace_glyphs_be16(clusters[i].num_chars, clusters[i].num_glyphs, gids + clusters[i].base_glyph);
- buffer->swap_buffers();
- hb_glyph_position_t *pPos;
- for (pPos = hb_buffer_get_glyph_positions(buffer, NULL), is = gr_seg_first_slot(seg);
- is; pPos++, is = gr_slot_next_in_segment(is))
+ if (gr_slot_can_insert_before (is) && clusters[ci].num_chars && before >= clusters[ci].base_char + clusters[ci].num_chars)
{
- pPos->x_offset = gr_slot_origin_X(is) - curradvx;
- pPos->y_offset = gr_slot_origin_Y(is) - curradvy;
- pPos->x_advance = gr_slot_advance_X(is, grface, grfont);
- pPos->y_advance = gr_slot_advance_Y(is, grface, grfont);
-// if (pPos->x_advance < 0 && gr_slot_attached_to(is))
-// pPos->x_advance = 0;
- curradvx += pPos->x_advance;
- curradvy += pPos->y_advance;
+ hb_gr_cluster_t *c = clusters + ci + 1;
+ c->base_char = clusters[ci].base_char + clusters[ci].num_chars;
+ c->num_chars = before - c->base_char;
+ c->base_glyph = ic;
+ c->num_glyphs = 0;
+ ++ci;
}
- pPos[-1].x_advance += gr_seg_advance_X(seg) - curradvx;
- success = 1;
+ ++clusters[ci].num_glyphs;
+
+ if (clusters[ci].base_char + clusters[ci].num_chars < after + 1)
+ clusters[ci].num_chars = after + 1 - clusters[ci].base_char;
+ }
+
+ buffer->clear_output();
+ for (unsigned int i = 0; i <= ci; ++i)
+ buffer->replace_glyphs_be16(clusters[i].num_chars, clusters[i].num_glyphs, gids + clusters[i].base_glyph);
+ buffer->swap_buffers();
+
+ hb_glyph_position_t *pPos;
+ for (pPos = hb_buffer_get_glyph_positions(buffer, NULL), is = gr_seg_first_slot(seg);
+ is; pPos++, is = gr_slot_next_in_segment(is))
+ {
+ pPos->x_offset = gr_slot_origin_X(is) - curradvx;
+ pPos->y_offset = gr_slot_origin_Y(is) - curradvy;
+ pPos->x_advance = gr_slot_advance_X(is, data->grface, data->grfont);
+ pPos->y_advance = gr_slot_advance_Y(is, data->grface, data->grfont);
+// if (pPos->x_advance < 0 && gr_slot_attached_to(is))
+// pPos->x_advance = 0;
+ curradvx += pPos->x_advance;
+ curradvy += pPos->y_advance;
+ }
+ pPos[-1].x_advance += gr_seg_advance_X(seg) - curradvx;
+ success = 1;
dieout:
- if (gids) free(gids);
- if (clusters) free(clusters);
- if (seg) gr_seg_destroy(seg);
- if (text) free(text);
- return success;
+ if (gids) free (gids);
+ if (clusters) free (clusters);
+ if (seg) gr_seg_destroy (seg);
+ if (text) free (text);
+ return success;
}
projects / platform / upstream / libHarfBuzzSharp.git / commitdiff