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Add graphite2 integration from Martin Hosken

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To be modified, a lot.
This commit is contained in:
Behdad Esfahbod 2011-08-24 01:29:25 +02:00
parent 0e6d36d8a3
commit 1f49cf32c9
9 changed files with 542 additions and 18 deletions
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9
configure.ac
View File

@ -134,7 +134,14 @@ if $have_icu; then
fi
AM_CONDITIONAL(HAVE_ICU, $have_icu)
dnl ==========================================================================
AC_ARG_ENABLE(graphite,
AC_HELP_STRING([--disable-graphite], [build without graphite support]))
PKG_CHECK_MODULES(GRAPHITE, graphite2, have_graphite=true, have_graphite=false)
if test "x$enable_graphite" != xno -a $have_graphite; then
AC_DEFINE(HAVE_GRAPHITE, 1, [Have Graphite library])
fi
AM_CONDITIONAL(HAVE_GRAPHITE, [test "x$enable_graphite" != xno -a $have_graphite])
PKG_CHECK_MODULES(FREETYPE, freetype2 >= 2.3.8, have_freetype=true, have_freetype=false)
if $have_freetype; then

20
contrib/python/lib/harfbuzz.pyx
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@ -29,17 +29,15 @@ cdef extern from "hb-common.h" :
ctypedef unsigned long hb_tag_t
hb_tag_t hb_tag_from_string (char *s)
ctypedef void (*hb_destroy_func_t) (void *user_data)
ctypedef void *hb_language_t
hb_language_t hb_language_from_string(char *str)
char * hb_language_to_string(hb_language_t language)
cdef extern from "hb-unicode.h" :
# there must be a better way of syncing this list with the true source
ctypedef enum hb_script_t :
HB_SCRIPT_COMMON = 0
cdef extern from "hb-language.h" :
ctypedef void *hb_language_t
hb_language_t hb_language_from_string(char *str)
char * hb_language_to_string(hb_language_t language)
cdef extern from "hb-ot-tag.h" :
hb_script_t hb_ot_tag_to_script (hb_tag_t tag)
@ -80,8 +78,8 @@ cdef extern from "hb-buffer.h" :
void hb_buffer_add_glyph(hb_buffer_t *buffer, hb_codepoint_t codepoint, hb_mask_t mask, unsigned int cluster)
void hb_buffer_add_utf8(hb_buffer_t *buffer, char *text, unsigned int text_length, unsigned int item_offset, unsigned int item_length)
unsigned int hb_buffer_get_length(hb_buffer_t *buffer)
hb_glyph_info_t *hb_buffer_get_glyph_infos(hb_buffer_t *buffer)
hb_glyph_position_t *hb_buffer_get_glyph_positions(hb_buffer_t *buffer)
hb_glyph_info_t *hb_buffer_get_glyph_infos(hb_buffer_t *buffer, unsigned int *len)
hb_glyph_position_t *hb_buffer_get_glyph_positions(hb_buffer_t *buffer, unsigned int *len)
cdef extern from "hb-blob.h" :
cdef struct hb_blob_t :
@ -111,7 +109,7 @@ cdef extern from "hb-shape.h" :
unsigned int start
unsigned int end
void hb_shape (hb_font_t *font, hb_face_t *face, hb_buffer_t *buffer, hb_feature_t *features, unsigned int num_features)
void hb_shape (hb_font_t *font, hb_buffer_t *buffer, hb_feature_t *features, unsigned int num_features)
cdef extern from "hb-ft.h" :
hb_face_t *hb_ft_face_create (FT_Face ft_face, hb_destroy_func_t destroy)
@ -156,8 +154,8 @@ cdef class buffer :
res = []
num = hb_buffer_get_length(self.buffer)
infos = hb_buffer_get_glyph_infos(self.buffer)
positions = hb_buffer_get_glyph_positions(self.buffer)
infos = hb_buffer_get_glyph_infos(self.buffer, &num)
positions = hb_buffer_get_glyph_positions(self.buffer, &num)
for 0 <= i < num :
temp = glyphinfo(infos[i].codepoint, infos[i].cluster, (positions[i].x_advance / scale, positions[i].y_advance / scale), (positions[i].x_offset / scale, positions[i].y_offset / scale), positions[i].var.u32)
res.append(temp)
@ -210,6 +208,6 @@ cdef class ft :
aFeat.start = 0
aFeat.end = -1
aFeat += 1
hb_shape(self.hbfont, self.hbface, aBuffer.buffer, feats, len(features))
hb_shape(self.hbfont, aBuffer.buffer, feats, len(features))

2
contrib/python/runpy
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@ -1,2 +0,0 @@
#!/bin/sh
LD_LIBRARY_PATH=../../src/.libs PYTHONPATH=build/lib.`python -c 'import distutils.util, sys; print distutils.util.get_platform()+"-"+str(sys.version_info[0])+"."+str(sys.version_info[1])'` "$@"

4
contrib/python/scripts/hbtestfont
View File

@ -100,9 +100,9 @@ if not opts.nogui :
glyphs = []
org = [0, 0]
for g in res :
glyphs.append((g.gid, org[0] + g.offset[0], org[1] + g.offset[1]))
glyphs.append((g.gid, org[0] + g.offset[0], org[1] - g.offset[1]))
org[0] += g.advance[0]
org[1] += g.advance[1]
org[1] -= g.advance[1]
gobject.type_register(GlyphsWindow)
win = gtk.Window()

18
contrib/python/setup.py
View File

@ -1,10 +1,23 @@
#!/usr/bin/python
from distutils.core import setup
from optparse import OptionParser
from glob import glob
from Pyrex.Distutils.extension import Extension
from Pyrex.Distutils import build_ext
parser = OptionParser()
parser.add_option('-b','--build', help='Build directory in which libraries are found. Relative to project root')
parser.disable_interspersed_args()
(opts, args) = parser.parse_args()
rfile = file("runpy", "w")
rfile.write("""#!/bin/sh
LD_LIBRARY_PATH=../../%s/src/.libs PYTHONPATH=build/lib.`python -c 'import distutils.util, sys; print distutils.util.get_platform()+"-"+str(sys.version_info[0])+"."+str(sys.version_info[1])'` "$@"
""" % opts.build)
rfile.close()
setup(name='harfbuzz',
version='0.0.1',
description='Harfbuzz compatibility layer',
@ -13,13 +26,14 @@ setup(name='harfbuzz',
maintainer_email='martin_hosken@sil.org',
packages=['harfbuzz'],
ext_modules = [
Extension("harfbuzz", ["lib/harfbuzz.pyx"], libraries=["harfbuzz"], library_dirs=["../../src/.libs"], include_dirs=["/usr/include/freetype2", "../../src"]),
Extension("harfbuzz", ["lib/harfbuzz.pyx"], libraries=["harfbuzz"], library_dirs=["../../%s/src/.libs" % opts.build], include_dirs=["/usr/include/freetype2", "../../src", "../../%s/src" % opts.build]),
Extension("fontconfig", ["lib/fontconfig.pyx"], libraries=["fontconfig"])
],
cmdclass = {'build_ext' : build_ext},
scripts = glob('scripts/*'),
license = 'LGPL',
platforms = ['Linux', 'Win32', 'Mac OS X'],
package_dir = {'harfbuzz' : 'lib'}
package_dir = {'harfbuzz' : 'lib'},
script_args = args
)

7
src/Makefile.am
View File

@ -116,6 +116,13 @@ HBSOURCES += hb-ft.cc
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)

446
src/hb-graphite2.cc Normal file
View File

@ -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

47
src/hb-graphite2.h Normal file
View File

@ -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 */

7
src/hb-shape.cc
View File

@ -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 @@ static struct hb_shaper_pair_t {
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