1217 lines
44 KiB
C++
1217 lines
44 KiB
C++
/*
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* Copyright © 2012,2013 Mozilla Foundation.
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* Copyright © 2012,2013 Google, Inc.
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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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* Google Author(s): Behdad Esfahbod
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*/
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#define HB_SHAPER coretext
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#define hb_coretext_shaper_face_data_t CGFont
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#include "hb-shaper-impl-private.hh"
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#include "hb-coretext.h"
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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 void
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release_table_data (void *user_data)
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{
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CFDataRef cf_data = reinterpret_cast<CFDataRef> (user_data);
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CFRelease(cf_data);
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}
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static hb_blob_t *
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reference_table (hb_face_t *face HB_UNUSED, hb_tag_t tag, void *user_data)
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{
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CGFontRef cg_font = reinterpret_cast<CGFontRef> (user_data);
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CFDataRef cf_data = CGFontCopyTableForTag (cg_font, tag);
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if (unlikely (!cf_data))
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return NULL;
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const char *data = reinterpret_cast<const char*> (CFDataGetBytePtr (cf_data));
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const size_t length = CFDataGetLength (cf_data);
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if (!data || !length)
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return NULL;
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return hb_blob_create (data, length, HB_MEMORY_MODE_READONLY,
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reinterpret_cast<void *> (const_cast<__CFData *> (cf_data)),
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release_table_data);
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}
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hb_face_t *
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hb_coretext_face_create (CGFontRef cg_font)
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{
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return hb_face_create_for_tables (reference_table, CGFontRetain (cg_font), (hb_destroy_func_t) CGFontRelease);
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}
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HB_SHAPER_DATA_ENSURE_DECLARE(coretext, face)
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HB_SHAPER_DATA_ENSURE_DECLARE(coretext, font)
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/*
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* shaper face 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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hb_coretext_shaper_face_data_t *
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_hb_coretext_shaper_face_data_create (hb_face_t *face)
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{
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hb_coretext_shaper_face_data_t *data = NULL;
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if (face->destroy == (hb_destroy_func_t) CGFontRelease)
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{
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data = CGFontRetain ((CGFontRef) face->user_data);
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}
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else
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{
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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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if (likely (provider))
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{
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data = CGFontCreateWithDataProvider (provider);
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CGDataProviderRelease (provider);
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}
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}
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if (unlikely (!data)) {
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DEBUG_MSG (CORETEXT, face, "Face CGFontCreateWithDataProvider() failed");
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}
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return data;
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}
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void
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_hb_coretext_shaper_face_data_destroy (hb_coretext_shaper_face_data_t *data)
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{
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CFRelease (data);
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}
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CGFontRef
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hb_coretext_face_get_cg_font (hb_face_t *face)
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{
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if (unlikely (!hb_coretext_shaper_face_data_ensure (face))) return NULL;
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hb_coretext_shaper_face_data_t *face_data = HB_SHAPER_DATA_GET (face);
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return face_data;
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}
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/*
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* shaper font data
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*/
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struct hb_coretext_shaper_font_data_t {
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CTFontRef ct_font;
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CGFloat x_mult, y_mult; /* From CT space to HB space. */
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};
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hb_coretext_shaper_font_data_t *
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_hb_coretext_shaper_font_data_create (hb_font_t *font)
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{
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if (unlikely (!hb_coretext_shaper_face_data_ensure (font->face))) return NULL;
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hb_coretext_shaper_font_data_t *data = (hb_coretext_shaper_font_data_t *) calloc (1, sizeof (hb_coretext_shaper_font_data_t));
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if (unlikely (!data))
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return NULL;
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hb_face_t *face = font->face;
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hb_coretext_shaper_face_data_t *face_data = HB_SHAPER_DATA_GET (face);
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/* Choose a CoreText font size and calculate multipliers to convert to HarfBuzz space. */
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/* TODO: use upem instead of 36? */
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CGFloat font_size = 36.; /* Default... */
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/* No idea if the following is even a good idea. */
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if (font->y_ppem)
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font_size = font->y_ppem;
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if (font_size < 0)
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font_size = -font_size;
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data->x_mult = (CGFloat) font->x_scale / font_size;
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data->y_mult = (CGFloat) font->y_scale / font_size;
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data->ct_font = CTFontCreateWithGraphicsFont (face_data, font_size, 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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free (data);
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return NULL;
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}
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return data;
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}
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void
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_hb_coretext_shaper_font_data_destroy (hb_coretext_shaper_font_data_t *data)
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{
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CFRelease (data->ct_font);
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free (data);
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}
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/*
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* shaper shape_plan data
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*/
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struct hb_coretext_shaper_shape_plan_data_t {};
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hb_coretext_shaper_shape_plan_data_t *
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_hb_coretext_shaper_shape_plan_data_create (hb_shape_plan_t *shape_plan HB_UNUSED,
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const hb_feature_t *user_features HB_UNUSED,
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unsigned int num_user_features HB_UNUSED)
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{
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return (hb_coretext_shaper_shape_plan_data_t *) HB_SHAPER_DATA_SUCCEEDED;
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}
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void
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_hb_coretext_shaper_shape_plan_data_destroy (hb_coretext_shaper_shape_plan_data_t *data HB_UNUSED)
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{
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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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if (unlikely (!hb_coretext_shaper_font_data_ensure (font))) return NULL;
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hb_coretext_shaper_font_data_t *font_data = HB_SHAPER_DATA_GET (font);
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return font_data->ct_font;
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}
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/*
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* shaper
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*/
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struct feature_record_t {
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unsigned int feature;
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unsigned int setting;
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};
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struct active_feature_t {
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feature_record_t rec;
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unsigned int order;
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static int cmp (const active_feature_t *a, const active_feature_t *b) {
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return a->rec.feature < b->rec.feature ? -1 : a->rec.feature > b->rec.feature ? 1 :
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a->order < b->order ? -1 : a->order > b->order ? 1 :
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a->rec.setting < b->rec.setting ? -1 : a->rec.setting > b->rec.setting ? 1 :
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0;
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}
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bool operator== (const active_feature_t *f) {
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return cmp (this, f) == 0;
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}
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};
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struct feature_event_t {
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unsigned int index;
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bool start;
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active_feature_t feature;
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static int cmp (const feature_event_t *a, const feature_event_t *b) {
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return a->index < b->index ? -1 : a->index > b->index ? 1 :
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a->start < b->start ? -1 : a->start > b->start ? 1 :
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active_feature_t::cmp (&a->feature, &b->feature);
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}
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};
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struct range_record_t {
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CTFontRef font;
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unsigned int index_first; /* == start */
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unsigned int index_last; /* == end - 1 */
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};
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/* The following enum members are added in OS X 10.8. */
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#define kAltHalfWidthTextSelector 6
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#define kAltProportionalTextSelector 5
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#define kAlternateHorizKanaOffSelector 1
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#define kAlternateHorizKanaOnSelector 0
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#define kAlternateKanaType 34
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#define kAlternateVertKanaOffSelector 3
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#define kAlternateVertKanaOnSelector 2
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#define kCaseSensitiveLayoutOffSelector 1
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#define kCaseSensitiveLayoutOnSelector 0
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#define kCaseSensitiveLayoutType 33
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#define kCaseSensitiveSpacingOffSelector 3
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#define kCaseSensitiveSpacingOnSelector 2
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#define kContextualAlternatesOffSelector 1
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#define kContextualAlternatesOnSelector 0
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#define kContextualAlternatesType 36
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#define kContextualLigaturesOffSelector 19
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#define kContextualLigaturesOnSelector 18
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#define kContextualSwashAlternatesOffSelector 5
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#define kContextualSwashAlternatesOnSelector 4
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#define kDefaultLowerCaseSelector 0
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#define kDefaultUpperCaseSelector 0
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#define kHistoricalLigaturesOffSelector 21
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#define kHistoricalLigaturesOnSelector 20
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#define kHojoCharactersSelector 12
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#define kJIS2004CharactersSelector 11
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#define kLowerCasePetiteCapsSelector 2
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#define kLowerCaseSmallCapsSelector 1
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#define kLowerCaseType 37
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#define kMathematicalGreekOffSelector 11
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#define kMathematicalGreekOnSelector 10
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#define kNLCCharactersSelector 13
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#define kQuarterWidthTextSelector 4
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#define kScientificInferiorsSelector 4
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#define kStylisticAltEightOffSelector 17
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#define kStylisticAltEightOnSelector 16
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#define kStylisticAltEighteenOffSelector 37
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#define kStylisticAltEighteenOnSelector 36
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#define kStylisticAltElevenOffSelector 23
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#define kStylisticAltElevenOnSelector 22
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#define kStylisticAltFifteenOffSelector 31
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#define kStylisticAltFifteenOnSelector 30
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#define kStylisticAltFiveOffSelector 11
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#define kStylisticAltFiveOnSelector 10
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#define kStylisticAltFourOffSelector 9
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#define kStylisticAltFourOnSelector 8
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#define kStylisticAltFourteenOffSelector 29
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#define kStylisticAltFourteenOnSelector 28
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#define kStylisticAltNineOffSelector 19
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#define kStylisticAltNineOnSelector 18
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#define kStylisticAltNineteenOffSelector 39
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#define kStylisticAltNineteenOnSelector 38
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#define kStylisticAltOneOffSelector 3
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#define kStylisticAltOneOnSelector 2
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#define kStylisticAltSevenOffSelector 15
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#define kStylisticAltSevenOnSelector 14
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#define kStylisticAltSeventeenOffSelector 35
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#define kStylisticAltSeventeenOnSelector 34
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#define kStylisticAltSixOffSelector 13
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#define kStylisticAltSixOnSelector 12
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#define kStylisticAltSixteenOffSelector 33
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#define kStylisticAltSixteenOnSelector 32
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#define kStylisticAltTenOffSelector 21
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#define kStylisticAltTenOnSelector 20
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#define kStylisticAltThirteenOffSelector 27
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#define kStylisticAltThirteenOnSelector 26
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#define kStylisticAltThreeOffSelector 7
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#define kStylisticAltThreeOnSelector 6
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#define kStylisticAltTwelveOffSelector 25
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#define kStylisticAltTwelveOnSelector 24
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#define kStylisticAltTwentyOffSelector 41
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#define kStylisticAltTwentyOnSelector 40
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#define kStylisticAltTwoOffSelector 5
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#define kStylisticAltTwoOnSelector 4
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#define kStylisticAlternativesType 35
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#define kSwashAlternatesOffSelector 3
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#define kSwashAlternatesOnSelector 2
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#define kThirdWidthTextSelector 3
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#define kTraditionalNamesCharactersSelector 14
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#define kUpperCasePetiteCapsSelector 2
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#define kUpperCaseSmallCapsSelector 1
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#define kUpperCaseType 38
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/* Table data courtesy of Apple. */
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static const struct feature_mapping_t {
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FourCharCode otFeatureTag;
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uint16_t aatFeatureType;
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uint16_t selectorToEnable;
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uint16_t selectorToDisable;
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} feature_mappings[] = {
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{ 'c2pc', kUpperCaseType, kUpperCasePetiteCapsSelector, kDefaultUpperCaseSelector },
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{ 'c2sc', kUpperCaseType, kUpperCaseSmallCapsSelector, kDefaultUpperCaseSelector },
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{ 'calt', kContextualAlternatesType, kContextualAlternatesOnSelector, kContextualAlternatesOffSelector },
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{ 'case', kCaseSensitiveLayoutType, kCaseSensitiveLayoutOnSelector, kCaseSensitiveLayoutOffSelector },
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{ 'clig', kLigaturesType, kContextualLigaturesOnSelector, kContextualLigaturesOffSelector },
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{ 'cpsp', kCaseSensitiveLayoutType, kCaseSensitiveSpacingOnSelector, kCaseSensitiveSpacingOffSelector },
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{ 'cswh', kContextualAlternatesType, kContextualSwashAlternatesOnSelector, kContextualSwashAlternatesOffSelector },
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{ 'dlig', kLigaturesType, kRareLigaturesOnSelector, kRareLigaturesOffSelector },
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{ 'expt', kCharacterShapeType, kExpertCharactersSelector, 16 },
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{ 'frac', kFractionsType, kDiagonalFractionsSelector, kNoFractionsSelector },
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{ 'fwid', kTextSpacingType, kMonospacedTextSelector, 7 },
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{ 'halt', kTextSpacingType, kAltHalfWidthTextSelector, 7 },
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{ 'hist', kLigaturesType, kHistoricalLigaturesOnSelector, kHistoricalLigaturesOffSelector },
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{ 'hkna', kAlternateKanaType, kAlternateHorizKanaOnSelector, kAlternateHorizKanaOffSelector, },
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{ 'hlig', kLigaturesType, kHistoricalLigaturesOnSelector, kHistoricalLigaturesOffSelector },
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{ 'hngl', kTransliterationType, kHanjaToHangulSelector, kNoTransliterationSelector },
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{ 'hojo', kCharacterShapeType, kHojoCharactersSelector, 16 },
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{ 'hwid', kTextSpacingType, kHalfWidthTextSelector, 7 },
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{ 'ital', kItalicCJKRomanType, kCJKItalicRomanOnSelector, kCJKItalicRomanOffSelector },
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{ 'jp04', kCharacterShapeType, kJIS2004CharactersSelector, 16 },
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{ 'jp78', kCharacterShapeType, kJIS1978CharactersSelector, 16 },
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{ 'jp83', kCharacterShapeType, kJIS1983CharactersSelector, 16 },
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{ 'jp90', kCharacterShapeType, kJIS1990CharactersSelector, 16 },
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{ 'liga', kLigaturesType, kCommonLigaturesOnSelector, kCommonLigaturesOffSelector },
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{ 'lnum', kNumberCaseType, kUpperCaseNumbersSelector, 2 },
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{ 'mgrk', kMathematicalExtrasType, kMathematicalGreekOnSelector, kMathematicalGreekOffSelector },
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{ 'nlck', kCharacterShapeType, kNLCCharactersSelector, 16 },
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{ 'onum', kNumberCaseType, kLowerCaseNumbersSelector, 2 },
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{ 'ordn', kVerticalPositionType, kOrdinalsSelector, kNormalPositionSelector },
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{ 'palt', kTextSpacingType, kAltProportionalTextSelector, 7 },
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{ 'pcap', kLowerCaseType, kLowerCasePetiteCapsSelector, kDefaultLowerCaseSelector },
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{ 'pkna', kTextSpacingType, kProportionalTextSelector, 7 },
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{ 'pnum', kNumberSpacingType, kProportionalNumbersSelector, 4 },
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{ 'pwid', kTextSpacingType, kProportionalTextSelector, 7 },
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{ 'qwid', kTextSpacingType, kQuarterWidthTextSelector, 7 },
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{ 'ruby', kRubyKanaType, kRubyKanaOnSelector, kRubyKanaOffSelector },
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{ 'sinf', kVerticalPositionType, kScientificInferiorsSelector, kNormalPositionSelector },
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{ 'smcp', kLowerCaseType, kLowerCaseSmallCapsSelector, kDefaultLowerCaseSelector },
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{ 'smpl', kCharacterShapeType, kSimplifiedCharactersSelector, 16 },
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{ 'ss01', kStylisticAlternativesType, kStylisticAltOneOnSelector, kStylisticAltOneOffSelector },
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{ 'ss02', kStylisticAlternativesType, kStylisticAltTwoOnSelector, kStylisticAltTwoOffSelector },
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{ 'ss03', kStylisticAlternativesType, kStylisticAltThreeOnSelector, kStylisticAltThreeOffSelector },
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{ 'ss04', kStylisticAlternativesType, kStylisticAltFourOnSelector, kStylisticAltFourOffSelector },
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{ 'ss05', kStylisticAlternativesType, kStylisticAltFiveOnSelector, kStylisticAltFiveOffSelector },
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{ 'ss06', kStylisticAlternativesType, kStylisticAltSixOnSelector, kStylisticAltSixOffSelector },
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{ 'ss07', kStylisticAlternativesType, kStylisticAltSevenOnSelector, kStylisticAltSevenOffSelector },
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{ 'ss08', kStylisticAlternativesType, kStylisticAltEightOnSelector, kStylisticAltEightOffSelector },
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{ 'ss09', kStylisticAlternativesType, kStylisticAltNineOnSelector, kStylisticAltNineOffSelector },
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{ 'ss10', kStylisticAlternativesType, kStylisticAltTenOnSelector, kStylisticAltTenOffSelector },
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{ 'ss11', kStylisticAlternativesType, kStylisticAltElevenOnSelector, kStylisticAltElevenOffSelector },
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{ 'ss12', kStylisticAlternativesType, kStylisticAltTwelveOnSelector, kStylisticAltTwelveOffSelector },
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{ 'ss13', kStylisticAlternativesType, kStylisticAltThirteenOnSelector, kStylisticAltThirteenOffSelector },
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{ 'ss14', kStylisticAlternativesType, kStylisticAltFourteenOnSelector, kStylisticAltFourteenOffSelector },
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{ 'ss15', kStylisticAlternativesType, kStylisticAltFifteenOnSelector, kStylisticAltFifteenOffSelector },
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{ 'ss16', kStylisticAlternativesType, kStylisticAltSixteenOnSelector, kStylisticAltSixteenOffSelector },
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{ 'ss17', kStylisticAlternativesType, kStylisticAltSeventeenOnSelector, kStylisticAltSeventeenOffSelector },
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{ 'ss18', kStylisticAlternativesType, kStylisticAltEighteenOnSelector, kStylisticAltEighteenOffSelector },
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{ 'ss19', kStylisticAlternativesType, kStylisticAltNineteenOnSelector, kStylisticAltNineteenOffSelector },
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{ 'ss20', kStylisticAlternativesType, kStylisticAltTwentyOnSelector, kStylisticAltTwentyOffSelector },
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{ 'subs', kVerticalPositionType, kInferiorsSelector, kNormalPositionSelector },
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{ 'sups', kVerticalPositionType, kSuperiorsSelector, kNormalPositionSelector },
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{ 'swsh', kContextualAlternatesType, kSwashAlternatesOnSelector, kSwashAlternatesOffSelector },
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{ 'titl', kStyleOptionsType, kTitlingCapsSelector, kNoStyleOptionsSelector },
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{ 'tnam', kCharacterShapeType, kTraditionalNamesCharactersSelector, 16 },
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{ 'tnum', kNumberSpacingType, kMonospacedNumbersSelector, 4 },
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{ 'trad', kCharacterShapeType, kTraditionalCharactersSelector, 16 },
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{ 'twid', kTextSpacingType, kThirdWidthTextSelector, 7 },
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{ 'unic', kLetterCaseType, 14, 15 },
|
|
{ 'valt', kTextSpacingType, kAltProportionalTextSelector, 7 },
|
|
{ 'vert', kVerticalSubstitutionType, kSubstituteVerticalFormsOnSelector, kSubstituteVerticalFormsOffSelector },
|
|
{ 'vhal', kTextSpacingType, kAltHalfWidthTextSelector, 7 },
|
|
{ 'vkna', kAlternateKanaType, kAlternateVertKanaOnSelector, kAlternateVertKanaOffSelector },
|
|
{ 'vpal', kTextSpacingType, kAltProportionalTextSelector, 7 },
|
|
{ 'vrt2', kVerticalSubstitutionType, kSubstituteVerticalFormsOnSelector, kSubstituteVerticalFormsOffSelector },
|
|
{ 'zero', kTypographicExtrasType, kSlashedZeroOnSelector, kSlashedZeroOffSelector },
|
|
};
|
|
|
|
static int
|
|
_hb_feature_mapping_cmp (const void *key_, const void *entry_)
|
|
{
|
|
unsigned int key = * (unsigned int *) key_;
|
|
const feature_mapping_t * entry = (const feature_mapping_t *) entry_;
|
|
return key < entry->otFeatureTag ? -1 :
|
|
key > entry->otFeatureTag ? 1 :
|
|
0;
|
|
}
|
|
|
|
hb_bool_t
|
|
_hb_coretext_shape (hb_shape_plan_t *shape_plan,
|
|
hb_font_t *font,
|
|
hb_buffer_t *buffer,
|
|
const hb_feature_t *features,
|
|
unsigned int num_features)
|
|
{
|
|
hb_face_t *face = font->face;
|
|
hb_coretext_shaper_face_data_t *face_data = HB_SHAPER_DATA_GET (face);
|
|
hb_coretext_shaper_font_data_t *font_data = HB_SHAPER_DATA_GET (font);
|
|
|
|
/* Attach marks to their bases, to match the 'ot' shaper.
|
|
* Adapted from hb-ot-shape:hb_form_clusters().
|
|
* Note that this only makes us be closer to the 'ot' shaper,
|
|
* but by no means the same. For example, if there's
|
|
* B1 M1 B2 M2, and B1-B2 form a ligature, M2's cluster will
|
|
* continue pointing to B2 even though B2 was merged into B1's
|
|
* cluster... */
|
|
{
|
|
hb_unicode_funcs_t *unicode = buffer->unicode;
|
|
unsigned int count = buffer->len;
|
|
hb_glyph_info_t *info = buffer->info;
|
|
for (unsigned int i = 1; i < count; i++)
|
|
if (HB_UNICODE_GENERAL_CATEGORY_IS_MARK (unicode->general_category (info[i].codepoint)))
|
|
buffer->merge_clusters (i - 1, i + 1);
|
|
}
|
|
|
|
hb_auto_array_t<feature_record_t> feature_records;
|
|
hb_auto_array_t<range_record_t> range_records;
|
|
|
|
/*
|
|
* Set up features.
|
|
* (copied + modified from code from hb-uniscribe.cc)
|
|
*/
|
|
if (num_features)
|
|
{
|
|
/* Sort features by start/end events. */
|
|
hb_auto_array_t<feature_event_t> feature_events;
|
|
for (unsigned int i = 0; i < num_features; i++)
|
|
{
|
|
const feature_mapping_t * mapping = (const feature_mapping_t *) bsearch (&features[i].tag,
|
|
feature_mappings,
|
|
ARRAY_LENGTH (feature_mappings),
|
|
sizeof (feature_mappings[0]),
|
|
_hb_feature_mapping_cmp);
|
|
if (!mapping)
|
|
continue;
|
|
|
|
active_feature_t feature;
|
|
feature.rec.feature = mapping->aatFeatureType;
|
|
feature.rec.setting = features[i].value ? mapping->selectorToEnable : mapping->selectorToDisable;
|
|
feature.order = i;
|
|
|
|
feature_event_t *event;
|
|
|
|
event = feature_events.push ();
|
|
if (unlikely (!event))
|
|
goto fail_features;
|
|
event->index = features[i].start;
|
|
event->start = true;
|
|
event->feature = feature;
|
|
|
|
event = feature_events.push ();
|
|
if (unlikely (!event))
|
|
goto fail_features;
|
|
event->index = features[i].end;
|
|
event->start = false;
|
|
event->feature = feature;
|
|
}
|
|
feature_events.qsort ();
|
|
/* Add a strategic final event. */
|
|
{
|
|
active_feature_t feature;
|
|
feature.rec.feature = HB_TAG_NONE;
|
|
feature.rec.setting = 0;
|
|
feature.order = num_features + 1;
|
|
|
|
feature_event_t *event = feature_events.push ();
|
|
if (unlikely (!event))
|
|
goto fail_features;
|
|
event->index = 0; /* This value does magic. */
|
|
event->start = false;
|
|
event->feature = feature;
|
|
}
|
|
|
|
/* Scan events and save features for each range. */
|
|
hb_auto_array_t<active_feature_t> active_features;
|
|
unsigned int last_index = 0;
|
|
for (unsigned int i = 0; i < feature_events.len; i++)
|
|
{
|
|
feature_event_t *event = &feature_events[i];
|
|
|
|
if (event->index != last_index)
|
|
{
|
|
/* Save a snapshot of active features and the range. */
|
|
range_record_t *range = range_records.push ();
|
|
if (unlikely (!range))
|
|
goto fail_features;
|
|
|
|
if (active_features.len)
|
|
{
|
|
CFMutableArrayRef features_array = CFArrayCreateMutable(kCFAllocatorDefault, 0, &kCFTypeArrayCallBacks);
|
|
|
|
/* TODO sort and resolve conflicting features? */
|
|
/* active_features.qsort (); */
|
|
for (unsigned int j = 0; j < active_features.len; j++)
|
|
{
|
|
CFStringRef keys[2] = {
|
|
kCTFontFeatureTypeIdentifierKey,
|
|
kCTFontFeatureSelectorIdentifierKey
|
|
};
|
|
CFNumberRef values[2] = {
|
|
CFNumberCreate (kCFAllocatorDefault, kCFNumberIntType, &active_features[j].rec.feature),
|
|
CFNumberCreate (kCFAllocatorDefault, kCFNumberIntType, &active_features[j].rec.setting)
|
|
};
|
|
CFDictionaryRef dict = CFDictionaryCreate (kCFAllocatorDefault,
|
|
(const void **) keys,
|
|
(const void **) values,
|
|
2,
|
|
&kCFTypeDictionaryKeyCallBacks,
|
|
&kCFTypeDictionaryValueCallBacks);
|
|
CFRelease (values[0]);
|
|
CFRelease (values[1]);
|
|
|
|
CFArrayAppendValue (features_array, dict);
|
|
CFRelease (dict);
|
|
|
|
}
|
|
|
|
CFDictionaryRef attributes = CFDictionaryCreate (kCFAllocatorDefault,
|
|
(const void **) &kCTFontFeatureSettingsAttribute,
|
|
(const void **) &features_array,
|
|
1,
|
|
&kCFTypeDictionaryKeyCallBacks,
|
|
&kCFTypeDictionaryValueCallBacks);
|
|
CFRelease (features_array);
|
|
|
|
CTFontDescriptorRef font_desc = CTFontDescriptorCreateWithAttributes (attributes);
|
|
CFRelease (attributes);
|
|
|
|
range->font = CTFontCreateCopyWithAttributes (font_data->ct_font, 0.0, NULL, font_desc);
|
|
CFRelease (font_desc);
|
|
}
|
|
else
|
|
{
|
|
range->font = NULL;
|
|
}
|
|
|
|
range->index_first = last_index;
|
|
range->index_last = event->index - 1;
|
|
|
|
last_index = event->index;
|
|
}
|
|
|
|
if (event->start) {
|
|
active_feature_t *feature = active_features.push ();
|
|
if (unlikely (!feature))
|
|
goto fail_features;
|
|
*feature = event->feature;
|
|
} else {
|
|
active_feature_t *feature = active_features.find (&event->feature);
|
|
if (feature)
|
|
active_features.remove (feature - active_features.array);
|
|
}
|
|
}
|
|
|
|
if (!range_records.len) /* No active feature found. */
|
|
goto fail_features;
|
|
}
|
|
else
|
|
{
|
|
fail_features:
|
|
num_features = 0;
|
|
}
|
|
|
|
unsigned int scratch_size;
|
|
hb_buffer_t::scratch_buffer_t *scratch = buffer->get_scratch_buffer (&scratch_size);
|
|
|
|
#define ALLOCATE_ARRAY(Type, name, len, on_no_room) \
|
|
Type *name = (Type *) scratch; \
|
|
{ \
|
|
unsigned int _consumed = DIV_CEIL ((len) * sizeof (Type), sizeof (*scratch)); \
|
|
if (unlikely (_consumed > scratch_size)) \
|
|
{ \
|
|
on_no_room; \
|
|
assert (0); \
|
|
} \
|
|
scratch += _consumed; \
|
|
scratch_size -= _consumed; \
|
|
}
|
|
|
|
ALLOCATE_ARRAY (UniChar, pchars, buffer->len * 2, /*nothing*/);
|
|
unsigned int chars_len = 0;
|
|
for (unsigned int i = 0; i < buffer->len; i++) {
|
|
hb_codepoint_t c = buffer->info[i].codepoint;
|
|
if (likely (c <= 0xFFFFu))
|
|
pchars[chars_len++] = c;
|
|
else if (unlikely (c > 0x10FFFFu))
|
|
pchars[chars_len++] = 0xFFFDu;
|
|
else {
|
|
pchars[chars_len++] = 0xD800u + ((c - 0x10000u) >> 10);
|
|
pchars[chars_len++] = 0xDC00u + ((c - 0x10000u) & ((1 << 10) - 1));
|
|
}
|
|
}
|
|
|
|
ALLOCATE_ARRAY (unsigned int, log_clusters, chars_len, /*nothing*/);
|
|
chars_len = 0;
|
|
for (unsigned int i = 0; i < buffer->len; i++)
|
|
{
|
|
hb_codepoint_t c = buffer->info[i].codepoint;
|
|
unsigned int cluster = buffer->info[i].cluster;
|
|
log_clusters[chars_len++] = cluster;
|
|
if (hb_in_range (c, 0x10000u, 0x10FFFFu))
|
|
log_clusters[chars_len++] = cluster; /* Surrogates. */
|
|
}
|
|
|
|
#define FAIL(...) \
|
|
HB_STMT_START { \
|
|
DEBUG_MSG (CORETEXT, NULL, __VA_ARGS__); \
|
|
ret = false; \
|
|
goto fail; \
|
|
} HB_STMT_END;
|
|
|
|
bool ret = true;
|
|
CFStringRef string_ref = NULL;
|
|
CTLineRef line = NULL;
|
|
|
|
if (0)
|
|
{
|
|
resize_and_retry:
|
|
DEBUG_MSG (CORETEXT, buffer, "Buffer resize");
|
|
/* string_ref uses the scratch-buffer for backing store, and line references
|
|
* string_ref (via attr_string). We must release those before resizing buffer. */
|
|
assert (string_ref);
|
|
assert (line);
|
|
CFRelease (string_ref);
|
|
CFRelease (line);
|
|
string_ref = NULL;
|
|
line = NULL;
|
|
|
|
/* Get previous start-of-scratch-area, that we use later for readjusting
|
|
* our existing scratch arrays. */
|
|
unsigned int old_scratch_used;
|
|
hb_buffer_t::scratch_buffer_t *old_scratch;
|
|
old_scratch = buffer->get_scratch_buffer (&old_scratch_used);
|
|
old_scratch_used = scratch - old_scratch;
|
|
|
|
if (unlikely (!buffer->ensure (buffer->allocated * 2)))
|
|
FAIL ("Buffer resize failed");
|
|
|
|
/* Adjust scratch, pchars, and log_cluster arrays. This is ugly, but really the
|
|
* cleanest way to do without completely restructuring the rest of this shaper. */
|
|
scratch = buffer->get_scratch_buffer (&scratch_size);
|
|
pchars = reinterpret_cast<UniChar *> (((char *) scratch + ((char *) pchars - (char *) old_scratch)));
|
|
log_clusters = reinterpret_cast<unsigned int *> (((char *) scratch + ((char *) log_clusters - (char *) old_scratch)));
|
|
scratch += old_scratch_used;
|
|
scratch_size -= old_scratch_used;
|
|
}
|
|
retry:
|
|
{
|
|
string_ref = CFStringCreateWithCharactersNoCopy (NULL,
|
|
pchars, chars_len,
|
|
kCFAllocatorNull);
|
|
if (unlikely (!string_ref))
|
|
FAIL ("CFStringCreateWithCharactersNoCopy failed");
|
|
|
|
/* Create an attributed string, populate it, and create a line from it, then release attributed string. */
|
|
{
|
|
CFMutableAttributedStringRef attr_string = CFAttributedStringCreateMutable (kCFAllocatorDefault,
|
|
chars_len);
|
|
if (unlikely (!attr_string))
|
|
FAIL ("CFAttributedStringCreateMutable failed");
|
|
CFAttributedStringReplaceString (attr_string, CFRangeMake (0, 0), string_ref);
|
|
if (HB_DIRECTION_IS_VERTICAL (buffer->props.direction))
|
|
{
|
|
CFAttributedStringSetAttribute (attr_string, CFRangeMake (0, chars_len),
|
|
kCTVerticalFormsAttributeName, kCFBooleanTrue);
|
|
}
|
|
|
|
if (buffer->props.language)
|
|
{
|
|
/* What's the iOS equivalent of this check?
|
|
* The symbols was introduced in iOS 7.0.
|
|
* At any rate, our fallback is safe and works fine. */
|
|
#if MAC_OS_X_VERSION_MIN_REQUIRED < 1090
|
|
# define kCTLanguageAttributeName CFSTR ("NSLanguage")
|
|
#endif
|
|
CFStringRef lang = CFStringCreateWithCStringNoCopy (kCFAllocatorDefault,
|
|
hb_language_to_string (buffer->props.language),
|
|
kCFStringEncodingUTF8,
|
|
kCFAllocatorNull);
|
|
if (unlikely (!lang))
|
|
FAIL ("CFStringCreateWithCStringNoCopy failed");
|
|
CFAttributedStringSetAttribute (attr_string, CFRangeMake (0, chars_len),
|
|
kCTLanguageAttributeName, lang);
|
|
CFRelease (lang);
|
|
}
|
|
CFAttributedStringSetAttribute (attr_string, CFRangeMake (0, chars_len),
|
|
kCTFontAttributeName, font_data->ct_font);
|
|
|
|
if (num_features)
|
|
{
|
|
unsigned int start = 0;
|
|
range_record_t *last_range = &range_records[0];
|
|
for (unsigned int k = 0; k < chars_len; k++)
|
|
{
|
|
range_record_t *range = last_range;
|
|
while (log_clusters[k] < range->index_first)
|
|
range--;
|
|
while (log_clusters[k] > range->index_last)
|
|
range++;
|
|
if (range != last_range)
|
|
{
|
|
if (last_range->font)
|
|
CFAttributedStringSetAttribute (attr_string, CFRangeMake (start, k - start),
|
|
kCTFontAttributeName, last_range->font);
|
|
|
|
start = k;
|
|
}
|
|
|
|
last_range = range;
|
|
}
|
|
if (start != chars_len && last_range->font)
|
|
CFAttributedStringSetAttribute (attr_string, CFRangeMake (start, chars_len - start),
|
|
kCTFontAttributeName, last_range->font);
|
|
}
|
|
|
|
int level = HB_DIRECTION_IS_FORWARD (buffer->props.direction) ? 0 : 1;
|
|
CFNumberRef level_number = CFNumberCreate (kCFAllocatorDefault, kCFNumberIntType, &level);
|
|
CFDictionaryRef options = CFDictionaryCreate (kCFAllocatorDefault,
|
|
(const void **) &kCTTypesetterOptionForcedEmbeddingLevel,
|
|
(const void **) &level_number,
|
|
1,
|
|
&kCFTypeDictionaryKeyCallBacks,
|
|
&kCFTypeDictionaryValueCallBacks);
|
|
if (unlikely (!options))
|
|
FAIL ("CFDictionaryCreate failed");
|
|
|
|
CTTypesetterRef typesetter = CTTypesetterCreateWithAttributedStringAndOptions (attr_string, options);
|
|
CFRelease (options);
|
|
CFRelease (attr_string);
|
|
if (unlikely (!typesetter))
|
|
FAIL ("CTTypesetterCreateWithAttributedStringAndOptions failed");
|
|
|
|
line = CTTypesetterCreateLine (typesetter, CFRangeMake(0, 0));
|
|
CFRelease (typesetter);
|
|
if (unlikely (!line))
|
|
FAIL ("CTTypesetterCreateLine failed");
|
|
}
|
|
|
|
CFArrayRef glyph_runs = CTLineGetGlyphRuns (line);
|
|
unsigned int num_runs = CFArrayGetCount (glyph_runs);
|
|
DEBUG_MSG (CORETEXT, NULL, "Num runs: %d", num_runs);
|
|
|
|
buffer->len = 0;
|
|
uint32_t status_and = ~0, status_or = 0;
|
|
double advances_so_far = 0;
|
|
/* For right-to-left runs, CoreText returns the glyphs positioned such that
|
|
* any trailing whitespace is to the left of (0,0). Adjust coordinate system
|
|
* to fix for that. Test with any RTL string with trailing spaces.
|
|
* https://code.google.com/p/chromium/issues/detail?id=469028
|
|
*/
|
|
if (HB_DIRECTION_IS_BACKWARD (buffer->props.direction))
|
|
{
|
|
advances_so_far -= CTLineGetTrailingWhitespaceWidth (line);
|
|
if (HB_DIRECTION_IS_VERTICAL (buffer->props.direction))
|
|
advances_so_far = -advances_so_far;
|
|
}
|
|
|
|
const CFRange range_all = CFRangeMake (0, 0);
|
|
|
|
for (unsigned int i = 0; i < num_runs; i++)
|
|
{
|
|
CTRunRef run = static_cast<CTRunRef>(CFArrayGetValueAtIndex (glyph_runs, i));
|
|
CTRunStatus run_status = CTRunGetStatus (run);
|
|
status_or |= run_status;
|
|
status_and &= run_status;
|
|
DEBUG_MSG (CORETEXT, run, "CTRunStatus: %x", run_status);
|
|
double run_advance = CTRunGetTypographicBounds (run, range_all, NULL, NULL, NULL);
|
|
if (HB_DIRECTION_IS_VERTICAL (buffer->props.direction))
|
|
run_advance = -run_advance;
|
|
DEBUG_MSG (CORETEXT, run, "Run advance: %g", run_advance);
|
|
|
|
/* CoreText does automatic font fallback (AKA "cascading") for characters
|
|
* not supported by the requested font, and provides no way to turn it off,
|
|
* so we must detect if the returned run uses a font other than the requested
|
|
* one and fill in the buffer with .notdef glyphs instead of random glyph
|
|
* indices from a different font.
|
|
*/
|
|
CFDictionaryRef attributes = CTRunGetAttributes (run);
|
|
CTFontRef run_ct_font = static_cast<CTFontRef>(CFDictionaryGetValue (attributes, kCTFontAttributeName));
|
|
if (!CFEqual (run_ct_font, font_data->ct_font))
|
|
{
|
|
/* The run doesn't use our main font instance. We have to figure out
|
|
* whether font fallback happened, or this is just CoreText giving us
|
|
* another CTFont using the same underlying CGFont. CoreText seems
|
|
* to do that in a variety of situations, one of which being vertical
|
|
* text, but also perhaps for caching reasons.
|
|
*
|
|
* First, see if it uses any of our subfonts created to set font features...
|
|
*
|
|
* Next, compare the CGFont to the one we used to create our fonts.
|
|
* Even this doesn't work all the time.
|
|
*
|
|
* Finally, we compare PS names, which I don't think are unique...
|
|
*
|
|
* Looks like if we really want to be sure here we have to modify the
|
|
* font to change the name table, similar to what we do in the uniscribe
|
|
* backend.
|
|
*
|
|
* However, even that wouldn't work if we were passed in the CGFont to
|
|
* begin with.
|
|
*
|
|
* Webkit uses a slightly different approach: it installs LastResort
|
|
* as fallback chain, and then checks PS name of used font against
|
|
* LastResort. That one is safe for any font except for LastResort,
|
|
* as opposed to ours, which can fail if we are using any uninstalled
|
|
* font that has the same name as an installed font.
|
|
*
|
|
* See: http://github.com/behdad/harfbuzz/pull/36
|
|
*/
|
|
bool matched = false;
|
|
for (unsigned int i = 0; i < range_records.len; i++)
|
|
if (range_records[i].font && CFEqual (run_ct_font, range_records[i].font))
|
|
{
|
|
matched = true;
|
|
break;
|
|
}
|
|
if (!matched)
|
|
{
|
|
CGFontRef run_cg_font = CTFontCopyGraphicsFont (run_ct_font, 0);
|
|
if (run_cg_font)
|
|
{
|
|
matched = CFEqual (run_cg_font, face_data);
|
|
CFRelease (run_cg_font);
|
|
}
|
|
}
|
|
if (!matched)
|
|
{
|
|
CFStringRef font_ps_name = CTFontCopyName (font_data->ct_font, kCTFontPostScriptNameKey);
|
|
CFStringRef run_ps_name = CTFontCopyName (run_ct_font, kCTFontPostScriptNameKey);
|
|
CFComparisonResult result = CFStringCompare (run_ps_name, font_ps_name, 0);
|
|
CFRelease (run_ps_name);
|
|
CFRelease (font_ps_name);
|
|
if (result == kCFCompareEqualTo)
|
|
matched = true;
|
|
}
|
|
if (!matched)
|
|
{
|
|
CFRange range = CTRunGetStringRange (run);
|
|
DEBUG_MSG (CORETEXT, run, "Run used fallback font: %ld..%ld",
|
|
range.location, range.location + range.length);
|
|
if (!buffer->ensure_inplace (buffer->len + range.length))
|
|
goto resize_and_retry;
|
|
hb_glyph_info_t *info = buffer->info + buffer->len;
|
|
|
|
hb_codepoint_t notdef = 0;
|
|
hb_direction_t dir = buffer->props.direction;
|
|
hb_position_t x_advance, y_advance, x_offset, y_offset;
|
|
hb_font_get_glyph_advance_for_direction (font, notdef, dir, &x_advance, &y_advance);
|
|
hb_font_get_glyph_origin_for_direction (font, notdef, dir, &x_offset, &y_offset);
|
|
hb_position_t advance = x_advance + y_advance;
|
|
x_offset = -x_offset;
|
|
y_offset = -y_offset;
|
|
|
|
unsigned int old_len = buffer->len;
|
|
for (CFIndex j = range.location; j < range.location + range.length; j++)
|
|
{
|
|
UniChar ch = CFStringGetCharacterAtIndex (string_ref, j);
|
|
if (hb_in_range<UniChar> (ch, 0xDC00u, 0xDFFFu) && range.location < j)
|
|
{
|
|
ch = CFStringGetCharacterAtIndex (string_ref, j - 1);
|
|
if (hb_in_range<UniChar> (ch, 0xD800u, 0xDBFFu))
|
|
/* This is the second of a surrogate pair. Don't need .notdef
|
|
* for this one. */
|
|
continue;
|
|
}
|
|
if (buffer->unicode->is_default_ignorable (ch))
|
|
continue;
|
|
|
|
info->codepoint = notdef;
|
|
info->cluster = log_clusters[j];
|
|
|
|
info->mask = advance;
|
|
info->var1.i32 = x_offset;
|
|
info->var2.i32 = y_offset;
|
|
|
|
info++;
|
|
buffer->len++;
|
|
}
|
|
if (HB_DIRECTION_IS_BACKWARD (buffer->props.direction))
|
|
buffer->reverse_range (old_len, buffer->len);
|
|
advances_so_far += run_advance;
|
|
continue;
|
|
}
|
|
}
|
|
|
|
unsigned int num_glyphs = CTRunGetGlyphCount (run);
|
|
if (num_glyphs == 0)
|
|
continue;
|
|
|
|
if (!buffer->ensure_inplace (buffer->len + num_glyphs))
|
|
goto resize_and_retry;
|
|
|
|
hb_glyph_info_t *run_info = buffer->info + buffer->len;
|
|
|
|
/* Testing used to indicate that CTRunGetGlyphsPtr, etc (almost?) always
|
|
* succeed, and so copying data to our own buffer will be rare. Reports
|
|
* have it that this changed in OS X 10.10 Yosemite, and NULL is returned
|
|
* frequently. At any rate, we can test that codepath by setting USE_PTR
|
|
* to false. */
|
|
|
|
#define USE_PTR true
|
|
|
|
#define SCRATCH_SAVE() \
|
|
unsigned int scratch_size_saved = scratch_size; \
|
|
hb_buffer_t::scratch_buffer_t *scratch_saved = scratch
|
|
|
|
#define SCRATCH_RESTORE() \
|
|
scratch_size = scratch_size_saved; \
|
|
scratch = scratch_saved;
|
|
|
|
{ /* Setup glyphs */
|
|
SCRATCH_SAVE();
|
|
const CGGlyph* glyphs = USE_PTR ? CTRunGetGlyphsPtr (run) : NULL;
|
|
if (!glyphs) {
|
|
ALLOCATE_ARRAY (CGGlyph, glyph_buf, num_glyphs, goto resize_and_retry);
|
|
CTRunGetGlyphs (run, range_all, glyph_buf);
|
|
glyphs = glyph_buf;
|
|
}
|
|
const CFIndex* string_indices = USE_PTR ? CTRunGetStringIndicesPtr (run) : NULL;
|
|
if (!string_indices) {
|
|
ALLOCATE_ARRAY (CFIndex, index_buf, num_glyphs, goto resize_and_retry);
|
|
CTRunGetStringIndices (run, range_all, index_buf);
|
|
string_indices = index_buf;
|
|
}
|
|
hb_glyph_info_t *info = run_info;
|
|
for (unsigned int j = 0; j < num_glyphs; j++)
|
|
{
|
|
info->codepoint = glyphs[j];
|
|
info->cluster = log_clusters[string_indices[j]];
|
|
info++;
|
|
}
|
|
SCRATCH_RESTORE();
|
|
}
|
|
{
|
|
/* Setup positions.
|
|
* Note that CoreText does not return advances for glyphs. As such,
|
|
* for all but last glyph, we use the delta position to next glyph as
|
|
* advance (in the advance direction only), and for last glyph we set
|
|
* whatever is needed to make the whole run's advance add up. */
|
|
SCRATCH_SAVE();
|
|
const CGPoint* positions = USE_PTR ? CTRunGetPositionsPtr (run) : NULL;
|
|
if (!positions) {
|
|
ALLOCATE_ARRAY (CGPoint, position_buf, num_glyphs, goto resize_and_retry);
|
|
CTRunGetPositions (run, range_all, position_buf);
|
|
positions = position_buf;
|
|
}
|
|
hb_glyph_info_t *info = run_info;
|
|
CGFloat x_mult = font_data->x_mult, y_mult = font_data->y_mult;
|
|
if (HB_DIRECTION_IS_HORIZONTAL (buffer->props.direction))
|
|
{
|
|
hb_position_t x_offset = (positions[0].x - advances_so_far) * x_mult;
|
|
for (unsigned int j = 0; j < num_glyphs; j++)
|
|
{
|
|
double advance;
|
|
if (likely (j + 1 < num_glyphs))
|
|
advance = positions[j + 1].x - positions[j].x;
|
|
else /* last glyph */
|
|
advance = run_advance - (positions[j].x - positions[0].x);
|
|
info->mask = advance * x_mult;
|
|
info->var1.i32 = x_offset;
|
|
info->var2.i32 = positions[j].y * y_mult;
|
|
info++;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
hb_position_t y_offset = (positions[0].y - advances_so_far) * y_mult;
|
|
for (unsigned int j = 0; j < num_glyphs; j++)
|
|
{
|
|
double advance;
|
|
if (likely (j + 1 < num_glyphs))
|
|
advance = positions[j + 1].y - positions[j].y;
|
|
else /* last glyph */
|
|
advance = run_advance - (positions[j].y - positions[0].y);
|
|
info->mask = advance * y_mult;
|
|
info->var1.i32 = positions[j].x * x_mult;
|
|
info->var2.i32 = y_offset;
|
|
info++;
|
|
}
|
|
}
|
|
SCRATCH_RESTORE();
|
|
advances_so_far += run_advance;
|
|
}
|
|
#undef SCRATCH_RESTORE
|
|
#undef SCRATCH_SAVE
|
|
#undef USE_PTR
|
|
#undef ALLOCATE_ARRAY
|
|
|
|
buffer->len += num_glyphs;
|
|
}
|
|
|
|
/* Mac OS 10.6 doesn't have kCTTypesetterOptionForcedEmbeddingLevel,
|
|
* or if it does, it doesn't resepct it. So we get runs with wrong
|
|
* directions. As such, disable the assert... It wouldn't crash, but
|
|
* cursoring will be off...
|
|
*
|
|
* http://crbug.com/419769
|
|
*/
|
|
if (0)
|
|
{
|
|
/* Make sure all runs had the expected direction. */
|
|
bool backward = HB_DIRECTION_IS_BACKWARD (buffer->props.direction);
|
|
assert (bool (status_and & kCTRunStatusRightToLeft) == backward);
|
|
assert (bool (status_or & kCTRunStatusRightToLeft) == backward);
|
|
}
|
|
|
|
buffer->clear_positions ();
|
|
|
|
unsigned int count = buffer->len;
|
|
hb_glyph_info_t *info = buffer->info;
|
|
hb_glyph_position_t *pos = buffer->pos;
|
|
if (HB_DIRECTION_IS_HORIZONTAL (buffer->props.direction))
|
|
for (unsigned int i = 0; i < count; i++)
|
|
{
|
|
pos->x_advance = info->mask;
|
|
pos->x_offset = info->var1.i32;
|
|
pos->y_offset = info->var2.i32;
|
|
info++, pos++;
|
|
}
|
|
else
|
|
for (unsigned int i = 0; i < count; i++)
|
|
{
|
|
pos->y_advance = info->mask;
|
|
pos->x_offset = info->var1.i32;
|
|
pos->y_offset = info->var2.i32;
|
|
info++, pos++;
|
|
}
|
|
|
|
/* Fix up clusters so that we never return out-of-order indices;
|
|
* if core text has reordered glyphs, we'll merge them to the
|
|
* beginning of the reordered cluster. CoreText is nice enough
|
|
* to tell us whenever it has produced nonmonotonic results...
|
|
* Note that we assume the input clusters were nonmonotonic to
|
|
* begin with.
|
|
*
|
|
* This does *not* mean we'll form the same clusters as Uniscribe
|
|
* or the native OT backend, only that the cluster indices will be
|
|
* monotonic in the output buffer. */
|
|
if (count > 1 && (status_or & kCTRunStatusNonMonotonic))
|
|
{
|
|
hb_glyph_info_t *info = buffer->info;
|
|
if (HB_DIRECTION_IS_FORWARD (buffer->props.direction))
|
|
{
|
|
unsigned int cluster = info[count - 1].cluster;
|
|
for (unsigned int i = count - 1; i > 0; i--)
|
|
{
|
|
cluster = MIN (cluster, info[i - 1].cluster);
|
|
info[i - 1].cluster = cluster;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
unsigned int cluster = info[0].cluster;
|
|
for (unsigned int i = 1; i < count; i++)
|
|
{
|
|
cluster = MIN (cluster, info[i].cluster);
|
|
info[i].cluster = cluster;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
#undef FAIL
|
|
|
|
fail:
|
|
if (string_ref)
|
|
CFRelease (string_ref);
|
|
if (line)
|
|
CFRelease (line);
|
|
|
|
for (unsigned int i = 0; i < range_records.len; i++)
|
|
if (range_records[i].font)
|
|
CFRelease (range_records[i].font);
|
|
|
|
return ret;
|
|
}
|
|
|
|
|
|
/*
|
|
* AAT shaper
|
|
*/
|
|
|
|
HB_SHAPER_DATA_ENSURE_DECLARE(coretext_aat, face)
|
|
HB_SHAPER_DATA_ENSURE_DECLARE(coretext_aat, font)
|
|
|
|
|
|
/*
|
|
* shaper face data
|
|
*/
|
|
|
|
struct hb_coretext_aat_shaper_face_data_t {};
|
|
|
|
hb_coretext_aat_shaper_face_data_t *
|
|
_hb_coretext_aat_shaper_face_data_create (hb_face_t *face)
|
|
{
|
|
hb_blob_t *mort_blob = face->reference_table (HB_CORETEXT_TAG_MORT);
|
|
/* Umm, we just reference the table to check whether it exists.
|
|
* Maybe add better API for this? */
|
|
if (!hb_blob_get_length (mort_blob))
|
|
{
|
|
hb_blob_destroy (mort_blob);
|
|
mort_blob = face->reference_table (HB_CORETEXT_TAG_MORX);
|
|
if (!hb_blob_get_length (mort_blob))
|
|
{
|
|
hb_blob_destroy (mort_blob);
|
|
return NULL;
|
|
}
|
|
}
|
|
hb_blob_destroy (mort_blob);
|
|
|
|
return hb_coretext_shaper_face_data_ensure (face) ? (hb_coretext_aat_shaper_face_data_t *) HB_SHAPER_DATA_SUCCEEDED : NULL;
|
|
}
|
|
|
|
void
|
|
_hb_coretext_aat_shaper_face_data_destroy (hb_coretext_aat_shaper_face_data_t *data HB_UNUSED)
|
|
{
|
|
}
|
|
|
|
|
|
/*
|
|
* shaper font data
|
|
*/
|
|
|
|
struct hb_coretext_aat_shaper_font_data_t {};
|
|
|
|
hb_coretext_aat_shaper_font_data_t *
|
|
_hb_coretext_aat_shaper_font_data_create (hb_font_t *font)
|
|
{
|
|
return hb_coretext_shaper_font_data_ensure (font) ? (hb_coretext_aat_shaper_font_data_t *) HB_SHAPER_DATA_SUCCEEDED : NULL;
|
|
}
|
|
|
|
void
|
|
_hb_coretext_aat_shaper_font_data_destroy (hb_coretext_aat_shaper_font_data_t *data HB_UNUSED)
|
|
{
|
|
}
|
|
|
|
|
|
/*
|
|
* shaper shape_plan data
|
|
*/
|
|
|
|
struct hb_coretext_aat_shaper_shape_plan_data_t {};
|
|
|
|
hb_coretext_aat_shaper_shape_plan_data_t *
|
|
_hb_coretext_aat_shaper_shape_plan_data_create (hb_shape_plan_t *shape_plan HB_UNUSED,
|
|
const hb_feature_t *user_features HB_UNUSED,
|
|
unsigned int num_user_features HB_UNUSED)
|
|
{
|
|
return (hb_coretext_aat_shaper_shape_plan_data_t *) HB_SHAPER_DATA_SUCCEEDED;
|
|
}
|
|
|
|
void
|
|
_hb_coretext_aat_shaper_shape_plan_data_destroy (hb_coretext_aat_shaper_shape_plan_data_t *data HB_UNUSED)
|
|
{
|
|
}
|
|
|
|
|
|
/*
|
|
* shaper
|
|
*/
|
|
|
|
hb_bool_t
|
|
_hb_coretext_aat_shape (hb_shape_plan_t *shape_plan,
|
|
hb_font_t *font,
|
|
hb_buffer_t *buffer,
|
|
const hb_feature_t *features,
|
|
unsigned int num_features)
|
|
{
|
|
return _hb_coretext_shape (shape_plan, font, buffer, features, num_features);
|
|
}
|