Edit
kc3-lang/harfbuzz/src/hb-uniscribe.cc
Behdad Esfahbod
- src/hb-uniscribe.cc
-
/* * Copyright © 2011,2012,2013 Google, Inc. * * This is part of HarfBuzz, a text shaping library. * * Permission is hereby granted, without written agreement and without * license or royalty fees, to use, copy, modify, and distribute this * software and its documentation for any purpose, provided that the * above copyright notice and the following two paragraphs appear in * all copies of this software. * * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH * DAMAGE. * * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS. * * Google Author(s): Behdad Esfahbod */ #include "hb.hh" #ifdef HAVE_UNISCRIBE #ifdef HB_NO_OT_TAG #error "Cannot compile 'uniscribe' shaper with HB_NO_OT_TAG." #endif #include "hb-shaper-impl.hh" #include <windows.h> #include <usp10.h> #include <rpc.h> #ifndef E_NOT_SUFFICIENT_BUFFER #define E_NOT_SUFFICIENT_BUFFER HRESULT_FROM_WIN32 (ERROR_INSUFFICIENT_BUFFER) #endif #include "hb-uniscribe.h" #include "hb-ms-feature-ranges.hh" #include "hb-open-file.hh" #include "hb-ot-name-table.hh" #include "hb-ot-layout.h" /** * SECTION:hb-uniscribe * @title: hb-uniscribe * @short_description: Windows integration * @include: hb-uniscribe.h * * Functions for using HarfBuzz with Windows fonts. **/ typedef HRESULT (WINAPI *SIOT) /*ScriptItemizeOpenType*/( const WCHAR *pwcInChars, int cInChars, int cMaxItems, const SCRIPT_CONTROL *psControl, const SCRIPT_STATE *psState, SCRIPT_ITEM *pItems, OPENTYPE_TAG *pScriptTags, int *pcItems ); typedef HRESULT (WINAPI *SSOT) /*ScriptShapeOpenType*/( HDC hdc, SCRIPT_CACHE *psc, SCRIPT_ANALYSIS *psa, OPENTYPE_TAG tagScript, OPENTYPE_TAG tagLangSys, int *rcRangeChars, TEXTRANGE_PROPERTIES **rpRangeProperties, int cRanges, const WCHAR *pwcChars, int cChars, int cMaxGlyphs, WORD *pwLogClust, SCRIPT_CHARPROP *pCharProps, WORD *pwOutGlyphs, SCRIPT_GLYPHPROP *pOutGlyphProps, int *pcGlyphs ); typedef HRESULT (WINAPI *SPOT) /*ScriptPlaceOpenType*/( HDC hdc, SCRIPT_CACHE *psc, SCRIPT_ANALYSIS *psa, OPENTYPE_TAG tagScript, OPENTYPE_TAG tagLangSys, int *rcRangeChars, TEXTRANGE_PROPERTIES **rpRangeProperties, int cRanges, const WCHAR *pwcChars, WORD *pwLogClust, SCRIPT_CHARPROP *pCharProps, int cChars, const WORD *pwGlyphs, const SCRIPT_GLYPHPROP *pGlyphProps, int cGlyphs, int *piAdvance, GOFFSET *pGoffset, ABC *pABC ); /* Fallback implementations. */ static HRESULT WINAPI hb_ScriptItemizeOpenType( const WCHAR *pwcInChars, int cInChars, int cMaxItems, const SCRIPT_CONTROL *psControl, const SCRIPT_STATE *psState, SCRIPT_ITEM *pItems, OPENTYPE_TAG *pScriptTags, int *pcItems ) { { return ScriptItemize (pwcInChars, cInChars, cMaxItems, psControl, psState, pItems, pcItems); } } static HRESULT WINAPI hb_ScriptShapeOpenType( HDC hdc, SCRIPT_CACHE *psc, SCRIPT_ANALYSIS *psa, OPENTYPE_TAG tagScript, OPENTYPE_TAG tagLangSys, int *rcRangeChars, TEXTRANGE_PROPERTIES **rpRangeProperties, int cRanges, const WCHAR *pwcChars, int cChars, int cMaxGlyphs, WORD *pwLogClust, SCRIPT_CHARPROP *pCharProps, WORD *pwOutGlyphs, SCRIPT_GLYPHPROP *pOutGlyphProps, int *pcGlyphs ) { SCRIPT_VISATTR *psva = (SCRIPT_VISATTR *) pOutGlyphProps; return ScriptShape (hdc, psc, pwcChars, cChars, cMaxGlyphs, psa, pwOutGlyphs, pwLogClust, psva, pcGlyphs); } static HRESULT WINAPI hb_ScriptPlaceOpenType( HDC hdc, SCRIPT_CACHE *psc, SCRIPT_ANALYSIS *psa, OPENTYPE_TAG tagScript, OPENTYPE_TAG tagLangSys, int *rcRangeChars, TEXTRANGE_PROPERTIES **rpRangeProperties, int cRanges, const WCHAR *pwcChars, WORD *pwLogClust, SCRIPT_CHARPROP *pCharProps, int cChars, const WORD *pwGlyphs, const SCRIPT_GLYPHPROP *pGlyphProps, int cGlyphs, int *piAdvance, GOFFSET *pGoffset, ABC *pABC ) { SCRIPT_VISATTR *psva = (SCRIPT_VISATTR *) pGlyphProps; return ScriptPlace (hdc, psc, pwGlyphs, cGlyphs, psva, psa, piAdvance, pGoffset, pABC); } struct hb_uniscribe_shaper_funcs_t { SIOT ScriptItemizeOpenType; SSOT ScriptShapeOpenType; SPOT ScriptPlaceOpenType; void init () { HMODULE hinstLib; this->ScriptItemizeOpenType = nullptr; this->ScriptShapeOpenType = nullptr; this->ScriptPlaceOpenType = nullptr; hinstLib = GetModuleHandle (TEXT ("usp10.dll")); if (hinstLib) { #pragma GCC diagnostic push #pragma GCC diagnostic ignored "-Wcast-function-type" this->ScriptItemizeOpenType = (SIOT) GetProcAddress (hinstLib, "ScriptItemizeOpenType"); this->ScriptShapeOpenType = (SSOT) GetProcAddress (hinstLib, "ScriptShapeOpenType"); this->ScriptPlaceOpenType = (SPOT) GetProcAddress (hinstLib, "ScriptPlaceOpenType"); #pragma GCC diagnostic pop } if (!this->ScriptItemizeOpenType || !this->ScriptShapeOpenType || !this->ScriptPlaceOpenType) { DEBUG_MSG (UNISCRIBE, nullptr, "OpenType versions of functions not found; falling back."); this->ScriptItemizeOpenType = hb_ScriptItemizeOpenType; this->ScriptShapeOpenType = hb_ScriptShapeOpenType; this->ScriptPlaceOpenType = hb_ScriptPlaceOpenType; } } }; static inline void free_static_uniscribe_shaper_funcs (); static struct hb_uniscribe_shaper_funcs_lazy_loader_t : hb_lazy_loader_t<hb_uniscribe_shaper_funcs_t, hb_uniscribe_shaper_funcs_lazy_loader_t> { static hb_uniscribe_shaper_funcs_t *create () { hb_uniscribe_shaper_funcs_t *funcs = (hb_uniscribe_shaper_funcs_t *) hb_calloc (1, sizeof (hb_uniscribe_shaper_funcs_t)); if (unlikely (!funcs)) return nullptr; funcs->init (); hb_atexit (free_static_uniscribe_shaper_funcs); return funcs; } static void destroy (hb_uniscribe_shaper_funcs_t *p) { hb_free ((void *) p); } static hb_uniscribe_shaper_funcs_t *get_null () { return nullptr; } } static_uniscribe_shaper_funcs; static inline void free_static_uniscribe_shaper_funcs () { static_uniscribe_shaper_funcs.free_instance (); } static hb_uniscribe_shaper_funcs_t * hb_uniscribe_shaper_get_funcs () { return static_uniscribe_shaper_funcs.get_unconst (); } /* * shaper face data */ struct hb_uniscribe_face_data_t { HANDLE fh; hb_uniscribe_shaper_funcs_t *funcs; wchar_t face_name[LF_FACESIZE]; }; /* face_name should point to a wchar_t[LF_FACESIZE] object. */ static void _hb_generate_unique_face_name (wchar_t *face_name, unsigned int *plen) { /* We'll create a private name for the font from a UUID using a simple, * somewhat base64-like encoding scheme */ const char *enc = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+-"; UUID id; UuidCreate ((UUID*) &id); static_assert ((2 + 3 * (16/2) < LF_FACESIZE), ""); unsigned int name_str_len = 0; face_name[name_str_len++] = 'F'; face_name[name_str_len++] = '_'; unsigned char *p = (unsigned char *) &id; for (unsigned int i = 0; i < 16; i += 2) { /* Spread the 16 bits from two bytes of the UUID across three chars of face_name, * using the bits in groups of 5,5,6 to select chars from enc. * This will generate 24 characters; with the 'F_' prefix we already provided, * the name will be 26 chars (plus the NUL terminator), so will always fit within * face_name (LF_FACESIZE = 32). */ face_name[name_str_len++] = enc[p[i] >> 3]; face_name[name_str_len++] = enc[((p[i] << 2) | (p[i + 1] >> 6)) & 0x1f]; face_name[name_str_len++] = enc[p[i + 1] & 0x3f]; } face_name[name_str_len] = 0; if (plen) *plen = name_str_len; } /* Destroys blob. */ static hb_blob_t * _hb_rename_font (hb_blob_t *blob, wchar_t *new_name) { /* Create a copy of the font data, with the 'name' table replaced by a * table that names the font with our private F_* name created above. * For simplicity, we just append a new 'name' table and update the * sfnt directory; the original table is left in place, but unused. * * The new table will contain just 5 name IDs: family, style, unique, * full, PS. All of them point to the same name data with our unique name. */ blob = hb_sanitize_context_t ().sanitize_blob<OT::OpenTypeFontFile> (blob); unsigned int length, new_length, name_str_len; const char *orig_sfnt_data = hb_blob_get_data (blob, &length); _hb_generate_unique_face_name (new_name, &name_str_len); static const uint16_t name_IDs[] = { 1, 2, 3, 4, 6 }; unsigned int name_table_length = OT::name::min_size + ARRAY_LENGTH (name_IDs) * OT::NameRecord::static_size + name_str_len * 2; /* for name data in UTF16BE form */ unsigned int padded_name_table_length = ((name_table_length + 3) & ~3); unsigned int name_table_offset = (length + 3) & ~3; new_length = name_table_offset + padded_name_table_length; void *new_sfnt_data = hb_calloc (1, new_length); if (!new_sfnt_data) { hb_blob_destroy (blob); return nullptr; } hb_memcpy(new_sfnt_data, orig_sfnt_data, length); OT::name &name = StructAtOffset<OT::name> (new_sfnt_data, name_table_offset); name.format = 0; name.count = ARRAY_LENGTH (name_IDs); name.stringOffset = name.get_size (); for (unsigned int i = 0; i < ARRAY_LENGTH (name_IDs); i++) { OT::NameRecord &record = name.nameRecordZ[i]; record.platformID = 3; record.encodingID = 1; record.languageID = 0x0409u; /* English */ record.nameID = name_IDs[i]; record.length = name_str_len * 2; record.offset = 0; } /* Copy string data from new_name, converting wchar_t to UTF16BE. */ unsigned char *p = &StructAfter<unsigned char> (name); for (unsigned int i = 0; i < name_str_len; i++) { *p++ = new_name[i] >> 8; *p++ = new_name[i] & 0xff; } /* Adjust name table entry to point to new name table */ const OT::OpenTypeFontFile &file = * (OT::OpenTypeFontFile *) (new_sfnt_data); unsigned int face_count = file.get_face_count (); for (unsigned int face_index = 0; face_index < face_count; face_index++) { /* Note: doing multiple edits (ie. TTC) can be unsafe. There may be * toe-stepping. But we don't really care. */ const OT::OpenTypeFontFace &face = file.get_face (face_index); unsigned int index; if (face.find_table_index (HB_OT_TAG_name, &index)) { OT::TableRecord &record = const_cast<OT::TableRecord &> (face.get_table (index)); record.checkSum.set_for_data (&name, padded_name_table_length); record.offset = name_table_offset; record.length = name_table_length; } else if (face_index == 0) /* Fail if first face doesn't have 'name' table. */ { hb_free (new_sfnt_data); hb_blob_destroy (blob); return nullptr; } } /* The checkSumAdjustment field in the 'head' table is now wrong, * but that doesn't actually seem to cause any problems so we don't * bother. */ hb_blob_destroy (blob); return hb_blob_create ((const char *) new_sfnt_data, new_length, HB_MEMORY_MODE_WRITABLE, new_sfnt_data, hb_free); } hb_uniscribe_face_data_t * _hb_uniscribe_shaper_face_data_create (hb_face_t *face) { hb_uniscribe_face_data_t *data = (hb_uniscribe_face_data_t *) hb_calloc (1, sizeof (hb_uniscribe_face_data_t)); if (unlikely (!data)) return nullptr; data->funcs = hb_uniscribe_shaper_get_funcs (); if (unlikely (!data->funcs)) { hb_free (data); return nullptr; } hb_blob_t *blob = hb_face_reference_blob (face); if (unlikely (!hb_blob_get_length (blob))) DEBUG_MSG (UNISCRIBE, face, "Face has empty blob"); blob = _hb_rename_font (blob, data->face_name); if (unlikely (!blob)) { hb_free (data); return nullptr; } DWORD num_fonts_installed; data->fh = AddFontMemResourceEx ((void *) hb_blob_get_data (blob, nullptr), hb_blob_get_length (blob), 0, &num_fonts_installed); if (unlikely (!data->fh)) { DEBUG_MSG (UNISCRIBE, face, "Face AddFontMemResourceEx() failed"); hb_free (data); return nullptr; } return data; } void _hb_uniscribe_shaper_face_data_destroy (hb_uniscribe_face_data_t *data) { RemoveFontMemResourceEx (data->fh); hb_free (data); } /* * shaper font data */ struct hb_uniscribe_font_data_t { HDC hdc; mutable LOGFONTW log_font; HFONT hfont; mutable SCRIPT_CACHE script_cache; double x_mult, y_mult; /* From LOGFONT space to HB space. */ }; static bool populate_log_font (LOGFONTW *lf, hb_font_t *font, unsigned int font_size) { hb_memset (lf, 0, sizeof (*lf)); lf->lfHeight = - (int) font_size; lf->lfCharSet = DEFAULT_CHARSET; hb_memcpy (lf->lfFaceName, font->face->data.uniscribe->face_name, sizeof (lf->lfFaceName)); return true; } hb_uniscribe_font_data_t * _hb_uniscribe_shaper_font_data_create (hb_font_t *font) { hb_uniscribe_font_data_t *data = (hb_uniscribe_font_data_t *) hb_calloc (1, sizeof (hb_uniscribe_font_data_t)); if (unlikely (!data)) return nullptr; int font_size = font->face->get_upem (); /* Default... */ /* No idea if the following is even a good idea. */ if (font->y_ppem) font_size = font->y_ppem; if (font_size < 0) font_size = -font_size; data->x_mult = (double) font->x_scale / font_size; data->y_mult = (double) font->y_scale / font_size; data->hdc = GetDC (nullptr); if (unlikely (!populate_log_font (&data->log_font, font, font_size))) { DEBUG_MSG (UNISCRIBE, font, "Font populate_log_font() failed"); _hb_uniscribe_shaper_font_data_destroy (data); return nullptr; } data->hfont = CreateFontIndirectW (&data->log_font); if (unlikely (!data->hfont)) { DEBUG_MSG (UNISCRIBE, font, "Font CreateFontIndirectW() failed"); _hb_uniscribe_shaper_font_data_destroy (data); return nullptr; } if (!SelectObject (data->hdc, data->hfont)) { DEBUG_MSG (UNISCRIBE, font, "Font SelectObject() failed"); _hb_uniscribe_shaper_font_data_destroy (data); return nullptr; } return data; } void _hb_uniscribe_shaper_font_data_destroy (hb_uniscribe_font_data_t *data) { if (data->hdc) ReleaseDC (nullptr, data->hdc); if (data->hfont) DeleteObject (data->hfont); if (data->script_cache) ScriptFreeCache (&data->script_cache); hb_free (data); } /** * hb_uniscribe_font_get_logfontw: * @font: The #hb_font_t to work upon * * Fetches the LOGFONTW structure that corresponds to the * specified #hb_font_t font. * * Return value: a pointer to the LOGFONTW retrieved * **/ LOGFONTW * hb_uniscribe_font_get_logfontw (hb_font_t *font) { const hb_uniscribe_font_data_t *data = font->data.uniscribe; return data ? &data->log_font : nullptr; } /** * hb_uniscribe_font_get_hfont: * @font: The #hb_font_t to work upon * * Fetches the HFONT handle that corresponds to the * specified #hb_font_t font. * * Return value: the HFONT retreieved * **/ HFONT hb_uniscribe_font_get_hfont (hb_font_t *font) { const hb_uniscribe_font_data_t *data = font->data.uniscribe; return data ? data->hfont : nullptr; } /* * shaper */ hb_bool_t _hb_uniscribe_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; const hb_uniscribe_face_data_t *face_data = face->data.uniscribe; const hb_uniscribe_font_data_t *font_data = font->data.uniscribe; hb_uniscribe_shaper_funcs_t *funcs = face_data->funcs; #define FAIL(...) \ HB_STMT_START { \ DEBUG_MSG (UNISCRIBE, nullptr, __VA_ARGS__); \ return false; \ } HB_STMT_END HRESULT hr; retry: unsigned int scratch_size; hb_buffer_t::scratch_buffer_t *scratch = buffer->get_scratch_buffer (&scratch_size); #define ALLOCATE_ARRAY(Type, name, len) \ Type *name = (Type *) scratch; \ do { \ unsigned int _consumed = DIV_CEIL ((len) * sizeof (Type), sizeof (*scratch)); \ assert (_consumed <= scratch_size); \ scratch += _consumed; \ scratch_size -= _consumed; \ } while (0) #define utf16_index() var1.u32 ALLOCATE_ARRAY (WCHAR, pchars, buffer->len * 2); unsigned int chars_len = 0; for (unsigned int i = 0; i < buffer->len; i++) { hb_codepoint_t c = buffer->info[i].codepoint; buffer->info[i].utf16_index() = chars_len; 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) & ((1u << 10) - 1)); } } ALLOCATE_ARRAY (WORD, log_clusters, chars_len); ALLOCATE_ARRAY (SCRIPT_CHARPROP, char_props, chars_len); if (num_features) { /* Need log_clusters to assign features. */ 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. */ } } /* The -2 in the following is to compensate for possible * alignment needed after the WORD array. sizeof(WORD) == 2. */ unsigned int glyphs_size = (scratch_size * sizeof (int) - 2) / (sizeof (WORD) + sizeof (SCRIPT_GLYPHPROP) + sizeof (int) + sizeof (GOFFSET) + sizeof (uint32_t)); ALLOCATE_ARRAY (WORD, glyphs, glyphs_size); ALLOCATE_ARRAY (SCRIPT_GLYPHPROP, glyph_props, glyphs_size); ALLOCATE_ARRAY (int, advances, glyphs_size); ALLOCATE_ARRAY (GOFFSET, offsets, glyphs_size); ALLOCATE_ARRAY (uint32_t, vis_clusters, glyphs_size); /* Note: * We can't touch the contents of glyph_props. Our fallback * implementations of Shape and Place functions use that buffer * by casting it to a different type. It works because they * both agree about it, but if we want to access it here we * need address that issue first. */ #undef ALLOCATE_ARRAY #define MAX_ITEMS 256 SCRIPT_ITEM items[MAX_ITEMS + 1]; SCRIPT_CONTROL bidi_control = {0}; SCRIPT_STATE bidi_state = {0}; ULONG script_tags[MAX_ITEMS]; int item_count; /* MinGW32 doesn't define fMergeNeutralItems, so we bruteforce */ //bidi_control.fMergeNeutralItems = true; *(uint32_t*)&bidi_control |= 1u<<24; bidi_state.uBidiLevel = HB_DIRECTION_IS_FORWARD (buffer->props.direction) ? 0 : 1; bidi_state.fOverrideDirection = 1; hr = funcs->ScriptItemizeOpenType (pchars, chars_len, MAX_ITEMS, &bidi_control, &bidi_state, items, script_tags, &item_count); if (unlikely (FAILED (hr))) FAIL ("ScriptItemizeOpenType() failed: 0x%08lx", hr); #undef MAX_ITEMS hb_tag_t lang_tag; unsigned int lang_count = 1; hb_ot_tags_from_script_and_language (buffer->props.script, buffer->props.language, nullptr, nullptr, &lang_count, &lang_tag); OPENTYPE_TAG language_tag = hb_uint32_swap (lang_count ? lang_tag : HB_TAG_NONE); /* * Set up features. */ static_assert ((sizeof (TEXTRANGE_PROPERTIES) == sizeof (hb_ms_features_t)), ""); static_assert ((sizeof (OPENTYPE_FEATURE_RECORD) == sizeof (hb_ms_feature_t)), ""); hb_vector_t<hb_ms_feature_t> feature_records; hb_vector_t<hb_ms_range_record_t> range_records; bool has_features = false; if (num_features) has_features = hb_ms_setup_features (features, num_features, feature_records, range_records); hb_vector_t<hb_ms_features_t*> range_properties; hb_vector_t<uint32_t> range_char_counts; unsigned int glyphs_offset = 0; unsigned int glyphs_len; bool backward = HB_DIRECTION_IS_BACKWARD (buffer->props.direction); for (int i = 0; i < item_count; i++) { unsigned int chars_offset = items[i].iCharPos; unsigned int item_chars_len = items[i + 1].iCharPos - chars_offset; if (has_features) hb_ms_make_feature_ranges (feature_records, range_records, item_chars_len, chars_offset, log_clusters, range_properties, range_char_counts); /* Asking for glyphs in logical order circumvents at least * one bug in Uniscribe. */ items[i].a.fLogicalOrder = true; retry_shape: hr = funcs->ScriptShapeOpenType (font_data->hdc, &font_data->script_cache, &items[i].a, script_tags[i], language_tag, (int *) range_char_counts.arrayZ, (TEXTRANGE_PROPERTIES**) range_properties.arrayZ, range_properties.length, pchars + chars_offset, item_chars_len, glyphs_size - glyphs_offset, /* out */ log_clusters + chars_offset, char_props + chars_offset, glyphs + glyphs_offset, glyph_props + glyphs_offset, (int *) &glyphs_len); if (unlikely (items[i].a.fNoGlyphIndex)) FAIL ("ScriptShapeOpenType() set fNoGlyphIndex"); if (unlikely (hr == E_OUTOFMEMORY || hr == E_NOT_SUFFICIENT_BUFFER)) { if (unlikely (!buffer->ensure (buffer->allocated * 2))) FAIL ("Buffer resize failed"); goto retry; } if (unlikely (hr == USP_E_SCRIPT_NOT_IN_FONT)) { if (items[i].a.eScript == SCRIPT_UNDEFINED) FAIL ("ScriptShapeOpenType() failed: Font doesn't support script"); items[i].a.eScript = SCRIPT_UNDEFINED; goto retry_shape; } if (unlikely (FAILED (hr))) { FAIL ("ScriptShapeOpenType() failed: 0x%08lx", hr); } for (unsigned int j = chars_offset; j < chars_offset + item_chars_len; j++) log_clusters[j] += glyphs_offset; hr = funcs->ScriptPlaceOpenType (font_data->hdc, &font_data->script_cache, &items[i].a, script_tags[i], language_tag, (int *) range_char_counts.arrayZ, (TEXTRANGE_PROPERTIES**) range_properties.arrayZ, range_properties.length, pchars + chars_offset, log_clusters + chars_offset, char_props + chars_offset, item_chars_len, glyphs + glyphs_offset, glyph_props + glyphs_offset, glyphs_len, /* out */ advances + glyphs_offset, offsets + glyphs_offset, nullptr); if (unlikely (FAILED (hr))) FAIL ("ScriptPlaceOpenType() failed: 0x%08lx", hr); if (DEBUG_ENABLED (UNISCRIBE)) fprintf (stderr, "Item %d RTL %d LayoutRTL %d LogicalOrder %d ScriptTag %c%c%c%c\n", i, items[i].a.fRTL, items[i].a.fLayoutRTL, items[i].a.fLogicalOrder, HB_UNTAG (hb_uint32_swap (script_tags[i]))); glyphs_offset += glyphs_len; } glyphs_len = glyphs_offset; /* Ok, we've got everything we need, now compose output buffer, * very, *very*, carefully! */ /* Calculate visual-clusters. That's what we ship. */ for (unsigned int i = 0; i < glyphs_len; i++) vis_clusters[i] = (uint32_t) -1; for (unsigned int i = 0; i < buffer->len; i++) { uint32_t *p = &vis_clusters[log_clusters[buffer->info[i].utf16_index()]]; *p = hb_min (*p, buffer->info[i].cluster); } for (unsigned int i = 1; i < glyphs_len; i++) if (vis_clusters[i] == (uint32_t) -1) vis_clusters[i] = vis_clusters[i - 1]; #undef utf16_index if (unlikely (!buffer->ensure (glyphs_len))) FAIL ("Buffer in error"); #undef FAIL /* Set glyph infos */ buffer->len = 0; for (unsigned int i = 0; i < glyphs_len; i++) { hb_glyph_info_t *info = &buffer->info[buffer->len++]; info->codepoint = glyphs[i]; info->cluster = vis_clusters[i]; /* The rest is crap. Let's store position info there for now. */ info->mask = advances[i]; info->var1.i32 = offsets[i].du; info->var2.i32 = offsets[i].dv; } /* Set glyph positions */ buffer->clear_positions (); double x_mult = font_data->x_mult, y_mult = font_data->y_mult; for (unsigned int i = 0; i < glyphs_len; i++) { hb_glyph_info_t *info = &buffer->info[i]; hb_glyph_position_t *pos = &buffer->pos[i]; /* TODO vertical */ pos->x_advance = x_mult * (int32_t) info->mask; pos->x_offset = x_mult * (backward ? -info->var1.i32 : info->var1.i32); pos->y_offset = y_mult * info->var2.i32; } if (backward) hb_buffer_reverse (buffer); buffer->clear_glyph_flags (); buffer->unsafe_to_break (); /* Wow, done! */ return true; } #endif