| /* |
| * 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; |
| } |
| |
| 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) |
| { |
| memset (lf, 0, sizeof (*lf)); |
| lf->lfHeight = - (int) font_size; |
| lf->lfCharSet = DEFAULT_CHARSET; |
| |
| 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 |