Add graphite2 integration from Martin Hosken
To be modified, a lot.
diff --git a/src/Makefile.am b/src/Makefile.am
index 0b20709..95980a2 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -116,6 +116,13 @@
HBHEADERS += hb-ft.h
endif
+if HAVE_GRAPHITE
+HBCFLAGS += $(GRAPHITE_CFLAGS)
+HBLIBS += $(GRAPHITE_LIBS)
+HBSOURCES += hb-graphite2.cc
+HBHEADERS += hb-graphite2.h
+endif
+
if HAVE_UNISCRIBE
HBCFLAGS += $(UNISCRIBE_CFLAGS)
HBLIBS += $(UNISCRIBE_LIBS)
diff --git a/src/hb-graphite2.cc b/src/hb-graphite2.cc
new file mode 100644
index 0000000..ccac015
--- /dev/null
+++ b/src/hb-graphite2.cc
@@ -0,0 +1,446 @@
+/*
+ * Copyright (C) 2011 Martin Hosken
+ * Copyright (C) 2011 SIL International
+ *
+ * This is part of HarfBuzz, a text shaping library.
+ *
+ * Permission is hereby granted, without written agreement and without
+ * license or royalty fees, to use, copy, modify, and distribute this
+ * software and its documentation for any purpose, provided that the
+ * above copyright notice and the following two paragraphs appear in
+ * all copies of this software.
+ *
+ * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
+ * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
+ * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
+ * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
+ * DAMAGE.
+ *
+ * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
+ * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ * 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.
+ */
+
+#include "hb-private.hh"
+#include "hb-buffer-private.hh"
+#include "hb-font-private.hh"
+#include "hb-ot-tag.h"
+#include <graphite2/Font.h>
+#include <graphite2/Segment.h>
+#include "hb-graphite2.h"
+#include <stdlib.h>
+#include <string.h>
+
+HB_BEGIN_DECLS
+
+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);
+}
+
+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);
+}
+
+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 void hbgr_font_destroy(void *data)
+{
+ hbgr_font_t *fcomp = (hbgr_font_t *)data;
+ fcomp->destroy(fcomp->data);
+ gr_font_destroy(fcomp->grfont);
+}
+
+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)
+{
+ return ((hbgr_font_t *)font)->klass->get.glyph_h_advance(((hbgr_font_t *)font)->font, font_data, glyph, user_data);
+}
+
+static hb_position_t hbgr_font_get_glyph_v_advance (hb_font_t *font,
+ void *font_data,
+ hb_codepoint_t glyph,
+ void *user_data)
+{
+ return ((hbgr_font_t *)font)->klass->get.glyph_v_advance(((hbgr_font_t *)font)->font, font_data, glyph, user_data);
+}
+
+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)
+{
+ return ((hbgr_font_t *)font)->klass->get.glyph_h_origin(((hbgr_font_t *)font)->font, font_data, glyph, x, y, user_data);
+}
+
+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)
+{
+ return ((hbgr_font_t *)font)->klass->get.glyph_v_origin(((hbgr_font_t *)font)->font, font_data, glyph, x, y, user_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);
+}
+
+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_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)
+{
+ return ((hbgr_font_t *)font)->klass->get.glyph_extents(((hbgr_font_t *)font)->font, font_data, glyph, extents, user_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)
+{
+ 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_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)
+{
+ // 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)
+ {
+ 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
+ }
+ 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))
+ {
+ 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;
+ }
+ 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;
+}
+
+int hb_graphite2_feature_check(const hb_feature_t *feats, unsigned int num_feats)
+{
+ while (num_feats--)
+ {
+ if (feats[num_feats].tag == HB_TAG(' ', 'R', 'N', 'D'))
+ return (feats[num_feats].value == 1);
+ }
+ return 1;
+}
+
+HB_END_DECLS
diff --git a/src/hb-graphite2.h b/src/hb-graphite2.h
new file mode 100644
index 0000000..0d471d5
--- /dev/null
+++ b/src/hb-graphite2.h
@@ -0,0 +1,47 @@
+/*
+ * Copyright (C) 2011 Martin Hosken
+ * Copyright (C) 2011 SIL International
+ *
+ * This is part of HarfBuzz, a text shaping library.
+ *
+ * Permission is hereby granted, without written agreement and without
+ * license or royalty fees, to use, copy, modify, and distribute this
+ * software and its documentation for any purpose, provided that the
+ * above copyright notice and the following two paragraphs appear in
+ * all copies of this software.
+ *
+ * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
+ * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
+ * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
+ * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
+ * DAMAGE.
+ *
+ * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
+ * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ * 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.
+ */
+
+#ifndef HB_GRAPHITE2_H
+#define HB_GRAPHITE2_H
+
+#include "hb.h"
+#include "hb-shape.h"
+
+HB_BEGIN_DECLS
+
+
+#define HB_GRAPHITE_TAG_Silf HB_TAG('S','i','l','f')
+
+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);
+
+int hb_graphite2_feature_check(const hb_feature_t *feats, unsigned int num_feats);
+
+HB_END_DECLS
+
+#endif /* HB_GRAPHITE2_H */
diff --git a/src/hb-shape.cc b/src/hb-shape.cc
index d42be6c..2e86c3c 100644
--- a/src/hb-shape.cc
+++ b/src/hb-shape.cc
@@ -30,6 +30,10 @@
#include "hb-buffer-private.hh"
+#ifdef HAVE_GRAPHITE
+#include "hb-font-private.hh"
+#include "hb-graphite2.h"
+#endif
#ifdef HAVE_UNISCRIBE
# include "hb-uniscribe.h"
#endif
@@ -50,6 +54,9 @@
hb_shape_func_t func;
} shapers[] = {
/* v--- Add new shapers in the right place here */
+#ifdef HAVE_GRAPHITE
+ HB_SHAPER_IMPLEMENT (graphite),
+#endif
#ifdef HAVE_UNISCRIBE
HB_SHAPER_IMPLEMENT (uniscribe),
#endif
