dlls/dwrite/dwrite_private.h

   1 /*
   2  * Copyright 2012 Nikolay Sivov for CodeWeavers
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2.1 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library; if not, write to the Free Software
  16  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  17  */
  18
  19 #include "dwrite_3.h"
  20 #include "d2d1.h"
  21
  22 #include "wine/debug.h"
  23 #include "wine/heap.h"
  24 #include "wine/list.h"
  25 #include "wine/unicode.h"
  26
  27 static const DWRITE_MATRIX identity =
  28 {
  29     1.0f, 0.0f,
  30     0.0f, 1.0f,
  31     0.0f, 0.0f
  32 };
  33
  34 static inline LPWSTR heap_strdupW(const WCHAR *str)
  35 {
  36     LPWSTR ret = NULL;
  37
  38     if(str) {
  39         DWORD size;
  40
  41         size = (strlenW(str)+1)*sizeof(WCHAR);
  42         ret = heap_alloc(size);
  43         if(ret)
  44             memcpy(ret, str, size);
  45     }
  46
  47     return ret;
  48 }
  49
  50 static inline LPWSTR heap_strdupnW(const WCHAR *str, UINT32 len)
  51 {
  52     WCHAR *ret = NULL;
  53
  54     if (len)
  55     {
  56         ret = heap_alloc((len+1)*sizeof(WCHAR));
  57         if(ret)
  58         {
  59             memcpy(ret, str, len*sizeof(WCHAR));
  60             ret[len] = 0;
  61         }
  62     }
  63
  64     return ret;
  65 }
  66
  67 static inline const char *debugstr_range(const DWRITE_TEXT_RANGE *range)
  68 {
  69     return wine_dbg_sprintf("%u:%u", range->startPosition, range->length);
  70 }
  71
  72 static inline const char *debugstr_matrix(const DWRITE_MATRIX *m)
  73 {
  74     if (!m) return "(null)";
  75     return wine_dbg_sprintf("{%.2f,%.2f,%.2f,%.2f,%.2f,%.2f}", m->m11, m->m12, m->m21, m->m22,
  76         m->dx, m->dy);
  77 }
  78
  79 static inline BOOL dwrite_array_reserve(void **elements, size_t *capacity, size_t count, size_t size)
  80 {
  81     size_t new_capacity, max_capacity;
  82     void *new_elements;
  83
  84     if (count <= *capacity)
  85         return TRUE;
  86
  87     max_capacity = ~(SIZE_T)0 / size;
  88     if (count > max_capacity)
  89         return FALSE;
  90
  91     new_capacity = max(4, *capacity);
  92     while (new_capacity < count && new_capacity <= max_capacity / 2)
  93         new_capacity *= 2;
  94     if (new_capacity < count)
  95         new_capacity = max_capacity;
  96
  97     if (!(new_elements = heap_realloc(*elements, new_capacity * size)))
  98         return FALSE;
  99
 100     *elements = new_elements;
 101     *capacity = new_capacity;
 102
 103     return TRUE;
 104 }
 105
 106 static inline const char *debugstr_tag(DWORD tag)
 107 {
 108     return debugstr_an((char *)&tag, 4);
 109 }
 110
 111 const char *debugstr_sa_script(UINT16) DECLSPEC_HIDDEN;
 112
 113 static inline unsigned short get_table_entry(const unsigned short *table, WCHAR ch)
 114 {
 115     return table[table[table[ch >> 8] + ((ch >> 4) & 0x0f)] + (ch & 0xf)];
 116 }
 117
 118 static inline FLOAT get_scaled_advance_width(INT32 advance, FLOAT emSize, const DWRITE_FONT_METRICS *metrics)
 119 {
 120     return (FLOAT)advance * emSize / (FLOAT)metrics->designUnitsPerEm;
 121 }
 122
 123 static inline BOOL is_simulation_valid(DWRITE_FONT_SIMULATIONS simulations)
 124 {
 125     return (simulations & ~(DWRITE_FONT_SIMULATIONS_NONE | DWRITE_FONT_SIMULATIONS_BOLD |
 126         DWRITE_FONT_SIMULATIONS_OBLIQUE)) == 0;
 127 }
 128
 129 struct textlayout_desc
 130 {
 131     IDWriteFactory7 *factory;
 132     const WCHAR *string;
 133     UINT32 length;
 134     IDWriteTextFormat *format;
 135     FLOAT max_width;
 136     FLOAT max_height;
 137     BOOL is_gdi_compatible;
 138     /* fields below are only meaningful for gdi-compatible layout */
 139     FLOAT ppdip;
 140     const DWRITE_MATRIX *transform;
 141     BOOL use_gdi_natural;
 142 };
 143
 144 struct glyphrunanalysis_desc
 145 {
 146     const DWRITE_GLYPH_RUN *run;
 147     const DWRITE_MATRIX *transform;
 148     DWRITE_RENDERING_MODE1 rendering_mode;
 149     DWRITE_MEASURING_MODE measuring_mode;
 150     DWRITE_GRID_FIT_MODE gridfit_mode;
 151     DWRITE_TEXT_ANTIALIAS_MODE aa_mode;
 152     D2D_POINT_2F origin;
 153 };
 154
 155 struct fontface_desc
 156 {
 157     IDWriteFactory7 *factory;
 158     DWRITE_FONT_FACE_TYPE face_type;
 159     IDWriteFontFile * const *files;
 160     IDWriteFontFileStream *stream;
 161     UINT32 files_number;
 162     UINT32 index;
 163     DWRITE_FONT_SIMULATIONS simulations;
 164     struct dwrite_font_data *font_data; /* could be NULL when face is created directly with IDWriteFactory::CreateFontFace() */
 165 };
 166
 167 struct dwrite_fonttable
 168 {
 169     const BYTE *data;
 170     void *context;
 171     UINT32 size;
 172     BOOL exists;
 173 };
 174
 175 struct fontfacecached
 176 {
 177     struct list entry;
 178     IDWriteFontFace5 *fontface;
 179 };
 180
 181 #define GLYPH_BLOCK_SHIFT 8
 182 #define GLYPH_BLOCK_SIZE  (1UL << GLYPH_BLOCK_SHIFT)
 183 #define GLYPH_BLOCK_MASK  (GLYPH_BLOCK_SIZE - 1)
 184 #define GLYPH_MAX         65536
 185
 186 enum font_flags
 187 {
 188     FONT_IS_SYMBOL                 = 1 << 0,
 189     FONT_IS_MONOSPACED             = 1 << 1,
 190     FONT_IS_COLORED                = 1 << 2, /* CPAL/COLR support */
 191     FONTFACE_HAS_KERNING_PAIRS     = 1 << 3,
 192     FONTFACE_HAS_VERTICAL_VARIANTS = 1 << 4
 193 };
 194
 195 struct dwrite_fontface
 196 {
 197     IDWriteFontFace5 IDWriteFontFace5_iface;
 198     IDWriteFontFaceReference IDWriteFontFaceReference_iface;
 199     LONG refcount;
 200
 201     IDWriteFontFileStream *stream;
 202     IDWriteFontFile **files;
 203     UINT32 file_count;
 204     UINT32 index;
 205
 206     IDWriteFactory7 *factory;
 207     struct fontfacecached *cached;
 208
 209     USHORT simulations;
 210     DWRITE_FONT_FACE_TYPE type;
 211     DWRITE_FONT_METRICS1 metrics;
 212     DWRITE_CARET_METRICS caret;
 213     struct
 214     {
 215         unsigned int ascent;
 216         unsigned int descent;
 217     } typo_metrics;
 218     INT charmap;
 219     UINT32 flags;
 220
 221     struct dwrite_fonttable cmap;
 222     struct dwrite_fonttable vdmx;
 223     struct dwrite_fonttable gasp;
 224     struct dwrite_fonttable cpal;
 225     struct dwrite_fonttable colr;
 226     DWRITE_GLYPH_METRICS *glyphs[GLYPH_MAX/GLYPH_BLOCK_SIZE];
 227
 228     DWRITE_FONT_STYLE style;
 229     DWRITE_FONT_STRETCH stretch;
 230     DWRITE_FONT_WEIGHT weight;
 231     DWRITE_PANOSE panose;
 232     FONTSIGNATURE fontsig;
 233     UINT32 glyph_image_formats;
 234
 235     IDWriteLocalizedStrings *info_strings[DWRITE_INFORMATIONAL_STRING_SUPPORTED_SCRIPT_LANGUAGE_TAG + 1];
 236     IDWriteLocalizedStrings *family_names;
 237     IDWriteLocalizedStrings *names;
 238
 239     struct scriptshaping_cache *shaping_cache;
 240
 241     LOGFONTW lf;
 242 };
 243
 244 extern HRESULT create_numbersubstitution(DWRITE_NUMBER_SUBSTITUTION_METHOD,const WCHAR *locale,BOOL,IDWriteNumberSubstitution**) DECLSPEC_HIDDEN;
 245 extern HRESULT create_textformat(const WCHAR*,IDWriteFontCollection*,DWRITE_FONT_WEIGHT,DWRITE_FONT_STYLE,DWRITE_FONT_STRETCH,
 246                                  FLOAT,const WCHAR*,IDWriteTextFormat**) DECLSPEC_HIDDEN;
 247 extern HRESULT create_textlayout(const struct textlayout_desc*,IDWriteTextLayout**) DECLSPEC_HIDDEN;
 248 extern HRESULT create_trimmingsign(IDWriteFactory7 *factory, IDWriteTextFormat *format,
 249         IDWriteInlineObject **sign) DECLSPEC_HIDDEN;
 250 extern HRESULT create_typography(IDWriteTypography**) DECLSPEC_HIDDEN;
 251 extern HRESULT create_localizedstrings(IDWriteLocalizedStrings**) DECLSPEC_HIDDEN;
 252 extern HRESULT add_localizedstring(IDWriteLocalizedStrings*,const WCHAR*,const WCHAR*) DECLSPEC_HIDDEN;
 253 extern HRESULT clone_localizedstrings(IDWriteLocalizedStrings *iface, IDWriteLocalizedStrings **strings) DECLSPEC_HIDDEN;
 254 extern void    set_en_localizedstring(IDWriteLocalizedStrings*,const WCHAR*) DECLSPEC_HIDDEN;
 255 extern void    sort_localizedstrings(IDWriteLocalizedStrings*) DECLSPEC_HIDDEN;
 256 extern HRESULT get_system_fontcollection(IDWriteFactory7 *factory, IDWriteFontCollection1 **collection) DECLSPEC_HIDDEN;
 257 extern HRESULT get_eudc_fontcollection(IDWriteFactory7 *factory, IDWriteFontCollection3 **collection) DECLSPEC_HIDDEN;
 258 extern IDWriteTextAnalyzer *get_text_analyzer(void) DECLSPEC_HIDDEN;
 259 extern HRESULT create_font_file(IDWriteFontFileLoader *loader, const void *reference_key, UINT32 key_size, IDWriteFontFile **font_file) DECLSPEC_HIDDEN;
 260 extern void    init_local_fontfile_loader(void) DECLSPEC_HIDDEN;
 261 extern IDWriteFontFileLoader *get_local_fontfile_loader(void) DECLSPEC_HIDDEN;
 262 extern HRESULT create_fontface(const struct fontface_desc *desc, struct list *cached_list,
 263         IDWriteFontFace5 **fontface) DECLSPEC_HIDDEN;
 264 extern HRESULT create_font_collection(IDWriteFactory7 *factory, IDWriteFontFileEnumerator *enumerator, BOOL is_system,
 265        IDWriteFontCollection3 **collection) DECLSPEC_HIDDEN;
 266 extern HRESULT create_glyphrunanalysis(const struct glyphrunanalysis_desc*,IDWriteGlyphRunAnalysis**) DECLSPEC_HIDDEN;
 267 extern BOOL    is_system_collection(IDWriteFontCollection*) DECLSPEC_HIDDEN;
 268 extern HRESULT get_local_refkey(const WCHAR*,const FILETIME*,void**,UINT32*) DECLSPEC_HIDDEN;
 269 extern HRESULT get_filestream_from_file(IDWriteFontFile*,IDWriteFontFileStream**) DECLSPEC_HIDDEN;
 270 extern BOOL    is_face_type_supported(DWRITE_FONT_FACE_TYPE) DECLSPEC_HIDDEN;
 271 extern HRESULT get_family_names_from_stream(IDWriteFontFileStream*,UINT32,DWRITE_FONT_FACE_TYPE,IDWriteLocalizedStrings**) DECLSPEC_HIDDEN;
 272 extern HRESULT create_colorglyphenum(FLOAT,FLOAT,const DWRITE_GLYPH_RUN*,const DWRITE_GLYPH_RUN_DESCRIPTION*,DWRITE_MEASURING_MODE,
 273     const DWRITE_MATRIX*,UINT32,IDWriteColorGlyphRunEnumerator**) DECLSPEC_HIDDEN;
 274 extern BOOL lb_is_newline_char(WCHAR) DECLSPEC_HIDDEN;
 275 extern HRESULT create_system_fontfallback(IDWriteFactory7 *factory, IDWriteFontFallback1 **fallback) DECLSPEC_HIDDEN;
 276 extern void release_system_fontfallback(IDWriteFontFallback1 *fallback) DECLSPEC_HIDDEN;
 277 extern HRESULT create_fontfallback_builder(IDWriteFactory7 *factory, IDWriteFontFallbackBuilder **builder) DECLSPEC_HIDDEN;
 278 extern HRESULT create_matching_font(IDWriteFontCollection*,const WCHAR*,DWRITE_FONT_WEIGHT,DWRITE_FONT_STYLE,DWRITE_FONT_STRETCH,
 279     IDWriteFont**) DECLSPEC_HIDDEN;
 280 extern HRESULT create_fontfacereference(IDWriteFactory7 *factory, IDWriteFontFile *file, UINT32 face_index,
 281         DWRITE_FONT_SIMULATIONS simulations, DWRITE_FONT_AXIS_VALUE const *axis_values, UINT32 axis_values_count,
 282         IDWriteFontFaceReference1 **reference) DECLSPEC_HIDDEN;
 283 extern HRESULT factory_get_cached_fontface(IDWriteFactory7 *factory, IDWriteFontFile * const *files, UINT32 num_files,
 284         DWRITE_FONT_SIMULATIONS simulations, struct list **cache, REFIID riid, void **obj) DECLSPEC_HIDDEN;
 285 extern void factory_detach_fontcollection(IDWriteFactory7 *factory, IDWriteFontCollection3 *collection) DECLSPEC_HIDDEN;
 286 extern void factory_detach_gdiinterop(IDWriteFactory7 *factory, IDWriteGdiInterop1 *interop) DECLSPEC_HIDDEN;
 287 extern struct fontfacecached *factory_cache_fontface(IDWriteFactory7 *factory, struct list *fontfaces,
 288         IDWriteFontFace5 *fontface) DECLSPEC_HIDDEN;
 289 extern void    get_logfont_from_font(IDWriteFont*,LOGFONTW*) DECLSPEC_HIDDEN;
 290 extern void    get_logfont_from_fontface(IDWriteFontFace*,LOGFONTW*) DECLSPEC_HIDDEN;
 291 extern HRESULT get_fontsig_from_font(IDWriteFont*,FONTSIGNATURE*) DECLSPEC_HIDDEN;
 292 extern HRESULT get_fontsig_from_fontface(IDWriteFontFace*,FONTSIGNATURE*) DECLSPEC_HIDDEN;
 293 extern HRESULT create_gdiinterop(IDWriteFactory7 *factory, IDWriteGdiInterop1 **interop) DECLSPEC_HIDDEN;
 294 extern void fontface_detach_from_cache(IDWriteFontFace5 *fontface) DECLSPEC_HIDDEN;
 295 extern void factory_lock(IDWriteFactory7 *factory) DECLSPEC_HIDDEN;
 296 extern void factory_unlock(IDWriteFactory7 *factory) DECLSPEC_HIDDEN;
 297 extern HRESULT create_inmemory_fileloader(IDWriteFontFileLoader**) DECLSPEC_HIDDEN;
 298 extern HRESULT create_font_resource(IDWriteFactory7 *factory, IDWriteFontFile *file, UINT32 face_index,
 299         IDWriteFontResource **resource) DECLSPEC_HIDDEN;
 300
 301 struct dwrite_fontface;
 302
 303 extern float fontface_get_scaled_design_advance(struct dwrite_fontface *fontface, DWRITE_MEASURING_MODE measuring_mode,
 304         float emsize, float ppdip, const DWRITE_MATRIX *transform, UINT16 glyph, BOOL is_sideways) DECLSPEC_HIDDEN;
 305 extern struct dwrite_fontface *unsafe_impl_from_IDWriteFontFace(IDWriteFontFace *iface) DECLSPEC_HIDDEN;
 306
 307 /* Opentype font table functions */
 308 struct dwrite_font_props
 309 {
 310     DWRITE_FONT_STYLE style;
 311     DWRITE_FONT_STRETCH stretch;
 312     DWRITE_FONT_WEIGHT weight;
 313     DWRITE_PANOSE panose;
 314     FONTSIGNATURE fontsig;
 315     LOGFONTW lf;
 316     UINT32 flags;
 317 };
 318
 319 struct file_stream_desc {
 320     IDWriteFontFileStream *stream;
 321     DWRITE_FONT_FACE_TYPE face_type;
 322     UINT32 face_index;
 323 };
 324
 325 extern const void* get_fontface_table(IDWriteFontFace5 *fontface, UINT32 tag,
 326         struct dwrite_fonttable *table) DECLSPEC_HIDDEN;
 327
 328 extern HRESULT opentype_analyze_font(IDWriteFontFileStream*,BOOL*,DWRITE_FONT_FILE_TYPE*,DWRITE_FONT_FACE_TYPE*,UINT32*) DECLSPEC_HIDDEN;
 329 extern HRESULT opentype_try_get_font_table(const struct file_stream_desc *stream_desc, UINT32 tag, const void **data,
 330         void **context, UINT32 *size, BOOL *exists) DECLSPEC_HIDDEN;
 331 extern HRESULT opentype_cmap_get_unicode_ranges(const struct file_stream_desc *stream_desc, unsigned int max_count,
 332         DWRITE_UNICODE_RANGE *ranges, unsigned int *count) DECLSPEC_HIDDEN;
 333 extern void opentype_get_font_properties(struct file_stream_desc*,struct dwrite_font_props*) DECLSPEC_HIDDEN;
 334 extern void opentype_get_font_metrics(struct file_stream_desc*,DWRITE_FONT_METRICS1*,DWRITE_CARET_METRICS*) DECLSPEC_HIDDEN;
 335 extern void opentype_get_font_typo_metrics(struct file_stream_desc *stream_desc, unsigned int *ascent,
 336         unsigned int *descent) DECLSPEC_HIDDEN;
 337 extern HRESULT opentype_get_font_info_strings(const struct file_stream_desc *stream_desc,
 338         DWRITE_INFORMATIONAL_STRING_ID id, IDWriteLocalizedStrings **strings) DECLSPEC_HIDDEN;
 339 extern HRESULT opentype_get_font_familyname(struct file_stream_desc*,IDWriteLocalizedStrings**) DECLSPEC_HIDDEN;
 340 extern HRESULT opentype_get_font_facename(struct file_stream_desc*,WCHAR*,IDWriteLocalizedStrings**) DECLSPEC_HIDDEN;
 341 extern HRESULT opentype_get_typographic_features(IDWriteFontFace*,UINT32,UINT32,UINT32,UINT32*,DWRITE_FONT_FEATURE_TAG*) DECLSPEC_HIDDEN;
 342 extern BOOL opentype_get_vdmx_size(const struct dwrite_fonttable *table, INT ppem, UINT16 *ascent,
 343         UINT16 *descent) DECLSPEC_HIDDEN;
 344 extern unsigned int opentype_get_cpal_palettecount(const struct dwrite_fonttable *table) DECLSPEC_HIDDEN;
 345 extern unsigned int opentype_get_cpal_paletteentrycount(const struct dwrite_fonttable *table) DECLSPEC_HIDDEN;
 346 extern HRESULT opentype_get_cpal_entries(const struct dwrite_fonttable *table, unsigned int palette,
 347         unsigned int first_entry_index, unsigned int entry_count, DWRITE_COLOR_F *entries) DECLSPEC_HIDDEN;
 348 extern BOOL opentype_has_vertical_variants(IDWriteFontFace5 *fontface) DECLSPEC_HIDDEN;
 349 extern UINT32 opentype_get_glyph_image_formats(IDWriteFontFace5 *fontface) DECLSPEC_HIDDEN;
 350 extern DWRITE_CONTAINER_TYPE opentype_analyze_container_type(void const *, UINT32) DECLSPEC_HIDDEN;
 351
 352 struct dwrite_colorglyph {
 353     USHORT layer; /* [0, num_layers) index indicating current layer */
 354     /* base glyph record data, set once on initialization */
 355     USHORT first_layer;
 356     USHORT num_layers;
 357     /* current layer record data, updated every time glyph is switched to next layer */
 358     UINT16 glyph;
 359     UINT16 palette_index;
 360 };
 361
 362 extern HRESULT opentype_get_colr_glyph(const struct dwrite_fonttable *table, UINT16 glyph,
 363         struct dwrite_colorglyph *color_glyph) DECLSPEC_HIDDEN;
 364 extern void opentype_colr_next_glyph(const struct dwrite_fonttable *table,
 365         struct dwrite_colorglyph *color_glyph) DECLSPEC_HIDDEN;
 366
 367 enum gasp_flags {
 368     GASP_GRIDFIT             = 0x0001,
 369     GASP_DOGRAY              = 0x0002,
 370     GASP_SYMMETRIC_GRIDFIT   = 0x0004,
 371     GASP_SYMMETRIC_SMOOTHING = 0x0008,
 372 };
 373
 374 extern unsigned int opentype_get_gasp_flags(const struct dwrite_fonttable *gasp, float emsize) DECLSPEC_HIDDEN;
 375
 376 /* BiDi helpers */
 377 extern HRESULT bidi_computelevels(const WCHAR*,UINT32,UINT8,UINT8*,UINT8*) DECLSPEC_HIDDEN;
 378 extern WCHAR bidi_get_mirrored_char(WCHAR) DECLSPEC_HIDDEN;
 379
 380 /* FreeType integration */
 381 struct dwrite_glyphbitmap
 382 {
 383     IDWriteFontFace4 *fontface;
 384     DWORD simulations;
 385     float emsize;
 386     BOOL nohint;
 387     BOOL aliased;
 388     UINT16 glyph;
 389     INT pitch;
 390     RECT bbox;
 391     BYTE *buf;
 392     DWRITE_MATRIX *m;
 393 };
 394
 395 extern BOOL init_freetype(void) DECLSPEC_HIDDEN;
 396 extern void release_freetype(void) DECLSPEC_HIDDEN;
 397
 398 extern HRESULT freetype_get_design_glyph_metrics(struct dwrite_fontface *fontface, UINT16 glyph,
 399         DWRITE_GLYPH_METRICS *metrics) DECLSPEC_HIDDEN;
 400 extern void freetype_notify_cacheremove(IDWriteFontFace5 *fontface) DECLSPEC_HIDDEN;
 401 extern HRESULT freetype_get_glyphrun_outline(IDWriteFontFace5 *fontface, float emsize, UINT16 const *glyphs,
 402         float const *advances, DWRITE_GLYPH_OFFSET const *offsets, unsigned int count, BOOL is_rtl,
 403         IDWriteGeometrySink *sink) DECLSPEC_HIDDEN;
 404 extern UINT16 freetype_get_glyphcount(IDWriteFontFace5 *fontface) DECLSPEC_HIDDEN;
 405 extern void freetype_get_glyphs(IDWriteFontFace5 *fontface, INT charmap, UINT32 const *codepoints, UINT32 count,
 406         UINT16 *glyphs) DECLSPEC_HIDDEN;
 407 extern BOOL freetype_has_kerning_pairs(IDWriteFontFace5 *fontface) DECLSPEC_HIDDEN;
 408 extern INT32 freetype_get_kerning_pair_adjustment(IDWriteFontFace5 *fontface, UINT16 left, UINT16 right) DECLSPEC_HIDDEN;
 409 extern void freetype_get_glyph_bbox(struct dwrite_glyphbitmap *bitmap_desc) DECLSPEC_HIDDEN;
 410 extern BOOL freetype_get_glyph_bitmap(struct dwrite_glyphbitmap*) DECLSPEC_HIDDEN;
 411 extern INT freetype_get_charmap_index(IDWriteFontFace5 *fontface) DECLSPEC_HIDDEN;
 412 extern INT32 freetype_get_glyph_advance(IDWriteFontFace5 *fontface, FLOAT emsize, UINT16 index,
 413         DWRITE_MEASURING_MODE measuring_mode, BOOL *has_contours) DECLSPEC_HIDDEN;
 414 extern void freetype_get_design_glyph_bbox(IDWriteFontFace4*,UINT16,UINT16,RECT*) DECLSPEC_HIDDEN;
 415
 416 /* Glyph shaping */
 417 enum SCRIPT_JUSTIFY
 418 {
 419     SCRIPT_JUSTIFY_NONE,
 420     SCRIPT_JUSTIFY_ARABIC_BLANK,
 421     SCRIPT_JUSTIFY_CHARACTER,
 422     SCRIPT_JUSTIFY_RESERVED1,
 423     SCRIPT_JUSTIFY_BLANK,
 424     SCRIPT_JUSTIFY_RESERVED2,
 425     SCRIPT_JUSTIFY_RESERVED3,
 426     SCRIPT_JUSTIFY_ARABIC_NORMAL,
 427     SCRIPT_JUSTIFY_ARABIC_KASHIDA,
 428     SCRIPT_JUSTIFY_ARABIC_ALEF,
 429     SCRIPT_JUSTIFY_ARABIC_HA,
 430     SCRIPT_JUSTIFY_ARABIC_RA,
 431     SCRIPT_JUSTIFY_ARABIC_BA,
 432     SCRIPT_JUSTIFY_ARABIC_BARA,
 433     SCRIPT_JUSTIFY_ARABIC_SEEN,
 434     SCRIPT_JUSTIFY_ARABIC_SEEN_M
 435 };
 436
 437 struct scriptshaping_cache
 438 {
 439     const struct shaping_font_ops *font;
 440     void *context;
 441     UINT16 upem;
 442
 443     struct
 444     {
 445         struct dwrite_fonttable table;
 446         unsigned int script_list;
 447         unsigned int feature_list;
 448         unsigned int lookup_list;
 449     } gpos;
 450
 451     struct
 452     {
 453         struct dwrite_fonttable table;
 454         unsigned int classdef;
 455     } gdef;
 456 };
 457
 458 struct scriptshaping_context
 459 {
 460     struct scriptshaping_cache *cache;
 461     UINT32 language_tag;
 462
 463     const WCHAR *text;
 464     unsigned int length;
 465     BOOL is_rtl;
 466
 467     union
 468     {
 469         struct
 470         {
 471             const UINT16 *glyphs;
 472             const DWRITE_SHAPING_GLYPH_PROPERTIES *glyph_props;
 473         } pos;
 474     } u;
 475
 476     unsigned int glyph_count;
 477     float emsize;
 478     DWRITE_MEASURING_MODE measuring_mode;
 479     float *advances;
 480     DWRITE_GLYPH_OFFSET *offsets;
 481 };
 482
 483 struct shaping_font_ops
 484 {
 485     void (*grab_font_table)(void *context, UINT32 table, const BYTE **data, UINT32 *size, void **data_context);
 486     void (*release_font_table)(void *context, void *data_context);
 487     UINT16 (*get_font_upem)(void *context);
 488 };
 489
 490 extern struct scriptshaping_cache *create_scriptshaping_cache(void *context,
 491         const struct shaping_font_ops *font_ops) DECLSPEC_HIDDEN;
 492 extern void release_scriptshaping_cache(struct scriptshaping_cache*) DECLSPEC_HIDDEN;
 493 extern struct scriptshaping_cache *fontface_get_shaping_cache(struct dwrite_fontface *fontface) DECLSPEC_HIDDEN;
 494
 495 struct shaping_features
 496 {
 497     const DWORD *tags;
 498     unsigned int count;
 499 };
 500
 501 extern void opentype_layout_scriptshaping_cache_init(struct scriptshaping_cache *cache) DECLSPEC_HIDDEN;
 502 extern DWORD opentype_layout_find_script(const struct scriptshaping_cache *cache, DWORD kind, DWORD tag,
 503         unsigned int *script_index) DECLSPEC_HIDDEN;
 504 extern DWORD opentype_layout_find_language(const struct scriptshaping_cache *cache, DWORD kind, DWORD tag,
 505         unsigned int script_index, unsigned int *language_index) DECLSPEC_HIDDEN;
 506 extern void opentype_layout_apply_gpos_features(struct scriptshaping_context *context, unsigned int script_index,
 507         unsigned int language_index, const struct shaping_features *features) DECLSPEC_HIDDEN;
 508
 509 struct scriptshaping_ops
 510 {
 511     HRESULT (*contextual_shaping)(struct scriptshaping_context *context, UINT16 *clustermap, UINT16 *glyph_indices, UINT32* actual_glyph_count);
 512     HRESULT (*set_text_glyphs_props)(struct scriptshaping_context *context, UINT16 *clustermap, UINT16 *glyph_indices,
 513                                      UINT32 glyphcount, DWRITE_SHAPING_TEXT_PROPERTIES *text_props, DWRITE_SHAPING_GLYPH_PROPERTIES *glyph_props);
 514     const struct shaping_features *gpos_features;
 515 };
 516
 517 extern const struct scriptshaping_ops default_shaping_ops DECLSPEC_HIDDEN;
 518 extern const struct scriptshaping_ops latn_shaping_ops DECLSPEC_HIDDEN;
 519
 520 extern HRESULT shape_get_positions(struct scriptshaping_context *context, const DWORD *scripts,
 521         const struct shaping_features *features) DECLSPEC_HIDDEN;