[CoreText] Add basic Core Text backend for comparison with our native shaping
Does not attempt to handle clusters in a Uniscribe- or HarfBuzz-compatible way; just returns the original string indexes that CT maintains. These may even be out-of-order in the case of reordrant glyphs.
This commit is contained in:
Jonathan Kew
Behdad Esfahbod
parent
ec8d249469
commit
aa6d849838
12
configure.ac
12
configure.ac
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@ -186,6 +186,18 @@ AM_CONDITIONAL(HAVE_UNISCRIBE, $have_uniscribe)
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dnl ===========================================================================
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AC_CHECK_HEADERS(ApplicationServices/ApplicationServices.h, have_coretext=true, have_coretext=false)
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if $have_coretext; then
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CORETEXT_CFLAGS=
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CORETEXT_LIBS=
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AC_SUBST(CORETEXT_CFLAGS)
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AC_SUBST(CORETEXT_LIBS)
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AC_DEFINE(HAVE_CORETEXT, 1, [Have Core Text backend])
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fi
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AM_CONDITIONAL(HAVE_CORETEXT, $have_coretext)
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dnl ===========================================================================
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AC_CACHE_CHECK([for Intel atomic primitives], hb_cv_have_intel_atomic_primitives, [
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hb_cv_have_intel_atomic_primitives=false
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AC_TRY_LINK([
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@ -138,6 +138,13 @@ HBSOURCES += hb-uniscribe.cc hb-uniscribe-private.hh
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HBHEADERS += hb-uniscribe.h
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endif
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if HAVE_CORETEXT
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HBCFLAGS += $(CORETEXT_CFLAGS)
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HBLIBS += $(CORETEXT_LIBS)
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HBSOURCES += hb-coretext.cc hb-coretext-private.hh
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HBHEADERS += hb-coretext.h
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endif
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# Use a C linker, not C++; Don't link to libstdc++
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libharfbuzz_la_LINK = $(LINK) $(libharfbuzz_la_LDFLAGS)
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libharfbuzz_la_SOURCES = $(HBSOURCES) $(HBHEADERS)
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@ -0,0 +1,42 @@
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/*
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* Copyright © 2012 Mozilla Foundation.
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*
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* This is part of HarfBuzz, a text shaping library.
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*
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* Permission is hereby granted, without written agreement and without
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* license or royalty fees, to use, copy, modify, and distribute this
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* software and its documentation for any purpose, provided that the
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* above copyright notice and the following two paragraphs appear in
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* all copies of this software.
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*
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* IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
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* DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
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* ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
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* IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
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* DAMAGE.
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*
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* THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
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* BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
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* FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
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* ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
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* PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
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*
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* Mozilla Author(s): Jonathan Kew
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*/
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#ifndef HB_CORETEXT_PRIVATE_HH
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#define HB_CORETEXT_PRIVATE_HH
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#include "hb-private.hh"
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#include "hb-coretext.h"
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HB_INTERNAL hb_bool_t
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_hb_coretext_shape (hb_font_t *font,
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hb_buffer_t *buffer,
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const hb_feature_t *features,
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unsigned int num_features);
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#endif /* HB_CORETEXT_PRIVATE_HH */
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@ -0,0 +1,323 @@
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/*
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* Copyright © 2012 Mozilla Foundation.
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*
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* This is part of HarfBuzz, a text shaping library.
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*
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* Permission is hereby granted, without written agreement and without
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* license or royalty fees, to use, copy, modify, and distribute this
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* software and its documentation for any purpose, provided that the
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* above copyright notice and the following two paragraphs appear in
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* all copies of this software.
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*
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* IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
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* DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
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* ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
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* IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
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* DAMAGE.
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*
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* THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
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* BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
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* FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
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* ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
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* PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
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*
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* Mozilla Author(s): Jonathan Kew
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*/
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#include "hb-private.hh"
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#define GlyphID GlyphID_mac
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#include <ApplicationServices/ApplicationServices.h>
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#undef GlyphID
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#include "hb-coretext.h"
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#include "hb-ot-name-table.hh"
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#include "hb-ot-tag.h"
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#include "hb-font-private.hh"
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#include "hb-buffer-private.hh"
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#ifndef HB_DEBUG_CORETEXT
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#define HB_DEBUG_CORETEXT (HB_DEBUG+0)
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#endif
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static hb_user_data_key_t hb_coretext_data_key;
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static struct hb_coretext_face_data_t {
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CGFontRef cg_font;
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} _hb_coretext_face_data_nil = {0};
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static void
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_hb_coretext_face_data_destroy (hb_coretext_face_data_t *data)
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{
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if (data->cg_font)
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CFRelease (data->cg_font);
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free (data);
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}
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static void
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release_data (void *info, const void *data, size_t size)
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{
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assert (hb_blob_get_length ((hb_blob_t *) info) == size &&
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hb_blob_get_data ((hb_blob_t *) info, NULL) == data);
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hb_blob_destroy ((hb_blob_t *) info);
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}
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static hb_coretext_face_data_t *
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_hb_coretext_face_get_data (hb_face_t *face)
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{
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hb_coretext_face_data_t *data = (hb_coretext_face_data_t *) hb_face_get_user_data (face, &hb_coretext_data_key);
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if (likely (data)) return data;
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data = (hb_coretext_face_data_t *) calloc (1, sizeof (hb_coretext_face_data_t));
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if (unlikely (!data))
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return &_hb_coretext_face_data_nil;
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hb_blob_t *blob = hb_face_reference_blob (face);
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unsigned int blob_length;
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const char *blob_data = hb_blob_get_data (blob, &blob_length);
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if (unlikely (!blob_length))
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DEBUG_MSG (CORETEXT, face, "Face has empty blob");
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CGDataProviderRef provider = CGDataProviderCreateWithData (blob, blob_data, blob_length, &release_data);
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data->cg_font = CGFontCreateWithDataProvider (provider);
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CGDataProviderRelease (provider);
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if (unlikely (!data->cg_font))
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DEBUG_MSG (CORETEXT, face, "Face CGFontCreateWithDataProvider() failed");
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if (unlikely (!hb_face_set_user_data (face, &hb_coretext_data_key, data,
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(hb_destroy_func_t) _hb_coretext_face_data_destroy,
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false)))
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{
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_hb_coretext_face_data_destroy (data);
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data = (hb_coretext_face_data_t *) hb_face_get_user_data (face, &hb_coretext_data_key);
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if (data)
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return data;
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else
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return &_hb_coretext_face_data_nil;
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}
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return data;
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}
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static struct hb_coretext_font_data_t {
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CTFontRef ct_font;
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} _hb_coretext_font_data_nil = {0};
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static void
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_hb_coretext_font_data_destroy (hb_coretext_font_data_t *data)
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{
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if (data->ct_font)
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CFRelease (data->ct_font);
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free (data);
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}
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static hb_coretext_font_data_t *
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_hb_coretext_font_get_data (hb_font_t *font)
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{
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hb_coretext_font_data_t *data = (hb_coretext_font_data_t *) hb_font_get_user_data (font, &hb_coretext_data_key);
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if (likely (data)) return data;
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data = (hb_coretext_font_data_t *) calloc (1, sizeof (hb_coretext_font_data_t));
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if (unlikely (!data))
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return &_hb_coretext_font_data_nil;
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hb_coretext_face_data_t *face_data = _hb_coretext_face_get_data (font->face);
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data->ct_font = CTFontCreateWithGraphicsFont (face_data->cg_font, font->y_scale, NULL, NULL);
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if (unlikely (!data->ct_font))
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DEBUG_MSG (CORETEXT, font, "Font CTFontCreateWithGraphicsFont() failed");
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if (unlikely (!hb_font_set_user_data (font, &hb_coretext_data_key, data,
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(hb_destroy_func_t) _hb_coretext_font_data_destroy,
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false)))
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{
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_hb_coretext_font_data_destroy (data);
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data = (hb_coretext_font_data_t *) hb_font_get_user_data (font, &hb_coretext_data_key);
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if (data)
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return data;
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else
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return &_hb_coretext_font_data_nil;
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}
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return data;
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}
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CTFontRef
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hb_coretext_font_get_ct_font (hb_font_t *font)
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{
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hb_coretext_font_data_t *font_data = _hb_coretext_font_get_data (font);
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if (unlikely (!font_data))
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return 0;
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return font_data->ct_font;
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}
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hb_bool_t
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_hb_coretext_shape (hb_font_t *font,
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hb_buffer_t *buffer,
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const hb_feature_t *features,
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unsigned int num_features)
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{
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buffer->guess_properties ();
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#define FAIL(...) \
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HB_STMT_START { \
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DEBUG_MSG (CORETEXT, NULL, __VA_ARGS__); \
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return false; \
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} HB_STMT_END;
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hb_coretext_face_data_t *face_data = _hb_coretext_face_get_data (font->face);
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if (unlikely (!face_data->cg_font))
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FAIL ("Couldn't get face data");
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hb_coretext_font_data_t *font_data = _hb_coretext_font_get_data (font);
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if (unlikely (!font_data->ct_font))
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FAIL ("Couldn't get font font");
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if (unlikely (!buffer->len))
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return true;
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unsigned int scratch_size;
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char *scratch = (char *) buffer->get_scratch_buffer (&scratch_size);
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#define utf16_index() var1.u32
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UniChar *pchars = (UniChar *) scratch;
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unsigned int chars_len = 0;
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for (unsigned int i = 0; i < buffer->len; i++) {
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hb_codepoint_t c = buffer->info[i].codepoint;
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buffer->info[i].utf16_index() = chars_len;
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if (likely (c < 0x10000))
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pchars[chars_len++] = c;
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else if (unlikely (c >= 0x110000))
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pchars[chars_len++] = 0xFFFD;
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else {
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pchars[chars_len++] = 0xD800 + ((c - 0x10000) >> 10);
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pchars[chars_len++] = 0xDC00 + ((c - 0x10000) & ((1 << 10) - 1));
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}
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}
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#undef utf16_index
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CFStringRef string_ref = CFStringCreateWithCharactersNoCopy (kCFAllocatorDefault,
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pchars, chars_len,
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kCFAllocatorNull);
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CFDictionaryRef attrs = CFDictionaryCreate (kCFAllocatorDefault,
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(const void**) &kCTFontAttributeName,
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(const void**) &font_data->ct_font,
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1, // count of attributes
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&kCFTypeDictionaryKeyCallBacks,
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&kCFTypeDictionaryValueCallBacks);
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// TODO: support features
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// Now we can create an attributed string
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CFAttributedStringRef attr_string = CFAttributedStringCreate (kCFAllocatorDefault, string_ref, attrs);
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CFRelease (string_ref);
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CFRelease (attrs);
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// Create the CoreText line from our string, then we're done with it
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CTLineRef line = CTLineCreateWithAttributedString (attr_string);
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CFRelease (attr_string);
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// and finally retrieve the glyph data and store into the gfxTextRun
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CFArrayRef glyph_runs = CTLineGetGlyphRuns (line);
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unsigned int num_runs = CFArrayGetCount (glyph_runs);
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// Iterate through the glyph runs.
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bool success = true;
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buffer->len = 0;
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const CFRange range_all = CFRangeMake (0, 0);
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for (unsigned int i = 0; i < num_runs; i++) {
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CTRunRef run = (CTRunRef) CFArrayGetValueAtIndex (glyph_runs, i);
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unsigned int num_glyphs = CTRunGetGlyphCount (run);
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if (num_glyphs == 0)
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continue;
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buffer->ensure (buffer->len + num_glyphs);
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// retrieve the laid-out glyph data from the CTRun
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// Testing indicates that CTRunGetGlyphsPtr (almost?) always succeeds,
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// and so copying data to our own buffer with CTRunGetGlyphs will be
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// extremely rare.
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unsigned int scratch_size;
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char *scratch = (char *) buffer->get_scratch_buffer (&scratch_size);
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#define ALLOCATE_ARRAY(Type, name, len) \
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Type *name = (Type *) scratch; \
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scratch += len * sizeof (name[0]); \
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scratch_size -= len * sizeof (name[0]);
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const CGGlyph* glyphs = CTRunGetGlyphsPtr (run);
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if (!glyphs) {
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ALLOCATE_ARRAY (CGGlyph, glyph_buf, num_glyphs);
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CTRunGetGlyphs (run, range_all, glyph_buf);
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glyphs = glyph_buf;
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}
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const CGPoint* positions = CTRunGetPositionsPtr (run);
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if (!positions) {
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ALLOCATE_ARRAY (CGPoint, position_buf, num_glyphs);
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CTRunGetPositions (run, range_all, position_buf);
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positions = position_buf;
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}
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const CFIndex* string_indices = CTRunGetStringIndicesPtr (run);
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if (!string_indices) {
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ALLOCATE_ARRAY (CFIndex, index_buf, num_glyphs);
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CTRunGetStringIndices (run, range_all, index_buf);
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string_indices = index_buf;
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}
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#undef ALLOCATE_ARRAY
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double run_width = CTRunGetTypographicBounds (run, range_all, NULL, NULL, NULL);
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for (unsigned int j = 0; j < num_glyphs; j++) {
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double advance = (j + 1 < num_glyphs ? positions[j + 1].x : positions[0].x + run_width) - positions[j].x;
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hb_glyph_info_t *info = &buffer->info[buffer->len];
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hb_glyph_position_t *pos = &buffer->pos[buffer->len];
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info->codepoint = glyphs[j];
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info->cluster = string_indices[j];
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// currently, we do all x-positioning by setting the advance, we never use x-offset
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info->mask = advance;
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info->var1.u32 = 0;
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info->var2.u32 = positions[j].y;
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buffer->len++;
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}
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}
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buffer->clear_positions ();
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unsigned int count = buffer->len;
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for (unsigned int i = 0; i < count; ++i) {
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hb_glyph_info_t *info = &buffer->info[i];
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hb_glyph_position_t *pos = &buffer->pos[i];
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/* TODO vertical */
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pos->x_advance = info->mask;
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pos->x_offset = info->var1.u32;
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pos->y_offset = info->var2.u32;
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}
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return true;
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}
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@ -0,0 +1,43 @@
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/*
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* Copyright © 2012 Mozilla Foundation.
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*
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* This is part of HarfBuzz, a text shaping library.
|
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*
|
||||
* 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.
|
||||
*
|
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* Mozilla Author(s): Jonathan Kew
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*/
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#ifndef HB_CORETEXT_H
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#define HB_CORETEXT_H
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#include "hb.h"
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#include <ApplicationServices/ApplicationServices.h>
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HB_BEGIN_DECLS
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CTFontRef
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hb_coretext_font_get_ct_font (hb_font_t *font);
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HB_END_DECLS
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#endif /* HB_CORETEXT_H */
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@ -36,6 +36,9 @@
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#ifdef HAVE_UNISCRIBE
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# include "hb-uniscribe-private.hh"
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#endif
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#ifdef HAVE_CORETEXT
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# include "hb-coretext-private.hh"
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#endif
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#ifdef HAVE_OT
|
||||
# include "hb-ot-shape-private.hh"
|
||||
#endif
|
||||
|
|
@ -58,6 +61,9 @@ static const struct hb_shaper_pair_t {
|
|||
#ifdef HAVE_UNISCRIBE
|
||||
HB_SHAPER_IMPLEMENT (uniscribe),
|
||||
#endif
|
||||
#ifdef HAVE_CORETEXT
|
||||
HB_SHAPER_IMPLEMENT (coretext),
|
||||
#endif
|
||||
#ifdef HAVE_OT
|
||||
HB_SHAPER_IMPLEMENT (ot),
|
||||
#endif
|
||||
|
|
|
|||
Loading…
Reference in New Issue