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 #include "winternl.h"
  22
  23 #include "wine/debug.h"
  24 #include "wine/list.h"
  25 #include "wine/rbtree.h"
  26
  27 #define MS_GSUB_TAG DWRITE_MAKE_OPENTYPE_TAG('G','S','U','B')
  28 #define MS_GPOS_TAG DWRITE_MAKE_OPENTYPE_TAG('G','P','O','S')
  29
  30 static const DWRITE_MATRIX identity =
  31 {
  32     1.0f, 0.0f,
  33     0.0f, 1.0f,
  34     0.0f, 0.0f
  35 };
  36
  37 static inline LPWSTR heap_strdupnW(const WCHAR *str, UINT32 len)
  38 {
  39     WCHAR *ret = NULL;
  40
  41     if (len)
  42     {
  43         ret = malloc((len+1)*sizeof(WCHAR));
  44         if(ret)
  45         {
  46             memcpy(ret, str, len*sizeof(WCHAR));
  47             ret[len] = 0;
  48         }
  49     }
  50
  51     return ret;
  52 }
  53
  54 static inline const char *debugstr_range(const DWRITE_TEXT_RANGE *range)
  55 {
  56     return wine_dbg_sprintf("%u:%u", range->startPosition, range->length);
  57 }
  58
  59 static inline const char *debugstr_matrix(const DWRITE_MATRIX *m)
  60 {
  61     if (!m) return "(null)";
  62     return wine_dbg_sprintf("{%.2f,%.2f,%.2f,%.2f,%.2f,%.2f}", m->m11, m->m12, m->m21, m->m22,
  63         m->dx, m->dy);
  64 }
  65
  66 static inline BOOL dwrite_array_reserve(void **elements, size_t *capacity, size_t count, size_t size)
  67 {
  68     size_t new_capacity, max_capacity;
  69     void *new_elements;
  70
  71     if (count <= *capacity)
  72         return TRUE;
  73
  74     max_capacity = ~(SIZE_T)0 / size;
  75     if (count > max_capacity)
  76         return FALSE;
  77
  78     new_capacity = max(4, *capacity);
  79     while (new_capacity < count && new_capacity <= max_capacity / 2)
  80         new_capacity *= 2;
  81     if (new_capacity < count)
  82         new_capacity = max_capacity;
  83
  84     new_elements = realloc(*elements, new_capacity * size);
  85     if (!new_elements)
  86         return FALSE;
  87
  88     *elements = new_elements;
  89     *capacity = new_capacity;
  90
  91     return TRUE;
  92 }
  93
  94 static inline const char *debugstr_tag(DWORD tag)
  95 {
  96     return debugstr_an((char *)&tag, 4);
  97 }
  98
  99 const char *debugstr_sa_script(UINT16) DECLSPEC_HIDDEN;
 100
 101 static inline unsigned short get_table_entry(const unsigned short *table, WCHAR ch)
 102 {
 103     return table[table[table[ch >> 8] + ((ch >> 4) & 0x0f)] + (ch & 0xf)];
 104 }
 105
 106 static inline BOOL is_simulation_valid(DWRITE_FONT_SIMULATIONS simulations)
 107 {
 108     return (simulations & ~(DWRITE_FONT_SIMULATIONS_NONE | DWRITE_FONT_SIMULATIONS_BOLD |
 109         DWRITE_FONT_SIMULATIONS_OBLIQUE)) == 0;
 110 }
 111
 112 struct textlayout_desc
 113 {
 114     IDWriteFactory7 *factory;
 115     const WCHAR *string;
 116     UINT32 length;
 117     IDWriteTextFormat *format;
 118     FLOAT max_width;
 119     FLOAT max_height;
 120     BOOL is_gdi_compatible;
 121     /* fields below are only meaningful for gdi-compatible layout */
 122     FLOAT ppdip;
 123     const DWRITE_MATRIX *transform;
 124     BOOL use_gdi_natural;
 125 };
 126
 127 struct glyphrunanalysis_desc
 128 {
 129     const DWRITE_GLYPH_RUN *run;
 130     const DWRITE_MATRIX *transform;
 131     DWRITE_RENDERING_MODE1 rendering_mode;
 132     DWRITE_MEASURING_MODE measuring_mode;
 133     DWRITE_GRID_FIT_MODE gridfit_mode;
 134     DWRITE_TEXT_ANTIALIAS_MODE aa_mode;
 135     D2D_POINT_2F origin;
 136 };
 137
 138 struct fontface_desc
 139 {
 140     IDWriteFactory7 *factory;
 141     DWRITE_FONT_FACE_TYPE face_type;
 142     IDWriteFontFile *file;
 143     IDWriteFontFileStream *stream;
 144     UINT32 index;
 145     DWRITE_FONT_SIMULATIONS simulations;
 146     struct dwrite_font_data *font_data; /* could be NULL when face is created directly with IDWriteFactory::CreateFontFace() */
 147 };
 148
 149 struct dwrite_fonttable
 150 {
 151     const BYTE *data;
 152     void *context;
 153     UINT32 size;
 154     BOOL exists;
 155 };
 156
 157 struct fontfacecached
 158 {
 159     struct list entry;
 160     IDWriteFontFace5 *fontface;
 161 };
 162
 163 #define GLYPH_BLOCK_SHIFT 8
 164 #define GLYPH_BLOCK_SIZE  (1UL << GLYPH_BLOCK_SHIFT)
 165 #define GLYPH_BLOCK_MASK  (GLYPH_BLOCK_SIZE - 1)
 166 #define GLYPH_MAX         65536
 167
 168 enum font_flags
 169 {
 170     FONT_IS_SYMBOL                = 0x00000001,
 171     FONT_IS_MONOSPACED            = 0x00000002,
 172     FONT_IS_COLORED               = 0x00000004, /* CPAL/COLR support */
 173     FONTFACE_KERNING_PAIRS        = 0x00000008,
 174     FONTFACE_NO_KERNING_PAIRS     = 0x00000010,
 175     FONTFACE_VERTICAL_VARIANTS    = 0x00000020,
 176     FONTFACE_NO_VERTICAL_VARIANTS = 0x00000040,
 177 };
 178
 179 struct dwrite_cmap;
 180
 181 typedef UINT16 (*p_cmap_get_glyph_func)(const struct dwrite_cmap *cmap, unsigned int ch);
 182 typedef unsigned int (*p_cmap_get_ranges_func)(const struct dwrite_cmap *cmap, unsigned int max_count,
 183     DWRITE_UNICODE_RANGE *ranges);
 184
 185 struct dwrite_cmap
 186 {
 187     const void *data;
 188     union
 189     {
 190         struct
 191         {
 192             unsigned int seg_count;
 193             unsigned int glyph_id_array_len;
 194
 195             const UINT16 *ends;
 196             const UINT16 *starts;
 197             const UINT16 *id_delta;
 198             const UINT16 *id_range_offset;
 199             const UINT16 *glyph_id_array;
 200         } format4;
 201         struct
 202         {
 203             unsigned int first;
 204             unsigned int last;
 205         } format6_10;
 206         struct
 207         {
 208             unsigned int group_count;
 209         } format12_13;
 210     } u;
 211     p_cmap_get_glyph_func get_glyph;
 212     p_cmap_get_ranges_func get_ranges;
 213     unsigned short symbol : 1;
 214     IDWriteFontFileStream *stream;
 215     void *table_context;
 216 };
 217
 218 extern void dwrite_cmap_init(struct dwrite_cmap *cmap, IDWriteFontFile *file, unsigned int face_index,
 219         DWRITE_FONT_FACE_TYPE face_type) DECLSPEC_HIDDEN;
 220 extern void dwrite_cmap_release(struct dwrite_cmap *cmap) DECLSPEC_HIDDEN;
 221 extern UINT16 opentype_cmap_get_glyph(const struct dwrite_cmap *cmap, unsigned int ch) DECLSPEC_HIDDEN;
 222 extern HRESULT opentype_cmap_get_unicode_ranges(const struct dwrite_cmap *cmap, unsigned int max_count,
 223         DWRITE_UNICODE_RANGE *ranges, unsigned int *count) DECLSPEC_HIDDEN;
 224
 225 struct dwrite_fontface;
 226 typedef UINT64 (*p_dwrite_fontface_get_font_object)(struct dwrite_fontface *fontface);
 227
 228 struct dwrite_fontface
 229 {
 230     IDWriteFontFace5 IDWriteFontFace5_iface;
 231     IDWriteFontFaceReference IDWriteFontFaceReference_iface;
 232     LONG refcount;
 233
 234     IDWriteFontFileStream *stream;
 235     IDWriteFontFile *file;
 236     UINT32 index;
 237
 238     IDWriteFactory7 *factory;
 239     struct fontfacecached *cached;
 240     UINT64 font_object;
 241     void *data_context;
 242     p_dwrite_fontface_get_font_object get_font_object;
 243     struct
 244     {
 245         struct wine_rb_tree tree;
 246         struct list mru;
 247         size_t max_size;
 248         size_t size;
 249     } cache;
 250     CRITICAL_SECTION cs;
 251
 252     USHORT simulations;
 253     DWRITE_FONT_FACE_TYPE type;
 254     DWRITE_FONT_METRICS1 metrics;
 255     DWRITE_CARET_METRICS caret;
 256     struct
 257     {
 258         unsigned int ascent;
 259         unsigned int descent;
 260     } typo_metrics;
 261     unsigned int flags;
 262
 263     struct dwrite_cmap cmap;
 264
 265     struct dwrite_fonttable vdmx;
 266     struct dwrite_fonttable gasp;
 267     struct dwrite_fonttable cpal;
 268     struct dwrite_fonttable colr;
 269     struct dwrite_fonttable kern;
 270     DWRITE_GLYPH_METRICS *glyphs[GLYPH_MAX/GLYPH_BLOCK_SIZE];
 271
 272     DWRITE_FONT_STYLE style;
 273     DWRITE_FONT_STRETCH stretch;
 274     DWRITE_FONT_WEIGHT weight;
 275     DWRITE_PANOSE panose;
 276     FONTSIGNATURE fontsig;
 277     UINT32 glyph_image_formats;
 278
 279     IDWriteLocalizedStrings *info_strings[DWRITE_INFORMATIONAL_STRING_SUPPORTED_SCRIPT_LANGUAGE_TAG + 1];
 280     IDWriteLocalizedStrings *family_names;
 281     IDWriteLocalizedStrings *names;
 282
 283     struct scriptshaping_cache *shaping_cache;
 284
 285     LOGFONTW lf;
 286 };
 287
 288 extern HRESULT create_numbersubstitution(DWRITE_NUMBER_SUBSTITUTION_METHOD,const WCHAR *locale,BOOL,IDWriteNumberSubstitution**) DECLSPEC_HIDDEN;
 289 extern HRESULT create_text_format(const WCHAR *family_name, IDWriteFontCollection *collection, DWRITE_FONT_WEIGHT weight,
 290         DWRITE_FONT_STYLE style, DWRITE_FONT_STRETCH stretch, float size, const WCHAR *locale, REFIID riid,
 291         void **out) DECLSPEC_HIDDEN;
 292 extern HRESULT create_textlayout(const struct textlayout_desc*,IDWriteTextLayout**) DECLSPEC_HIDDEN;
 293 extern HRESULT create_trimmingsign(IDWriteFactory7 *factory, IDWriteTextFormat *format,
 294         IDWriteInlineObject **sign) DECLSPEC_HIDDEN;
 295 extern HRESULT create_typography(IDWriteTypography**) DECLSPEC_HIDDEN;
 296 extern HRESULT create_localizedstrings(IDWriteLocalizedStrings**) DECLSPEC_HIDDEN;
 297 extern HRESULT add_localizedstring(IDWriteLocalizedStrings*,const WCHAR*,const WCHAR*) DECLSPEC_HIDDEN;
 298 extern HRESULT clone_localizedstrings(IDWriteLocalizedStrings *iface, IDWriteLocalizedStrings **strings) DECLSPEC_HIDDEN;
 299 extern void    set_en_localizedstring(IDWriteLocalizedStrings*,const WCHAR*) DECLSPEC_HIDDEN;
 300 extern void    sort_localizedstrings(IDWriteLocalizedStrings*) DECLSPEC_HIDDEN;
 301 extern unsigned int get_localizedstrings_count(IDWriteLocalizedStrings *strings) DECLSPEC_HIDDEN;
 302 extern BOOL localizedstrings_contains(IDWriteLocalizedStrings *strings, const WCHAR *str) DECLSPEC_HIDDEN;
 303 extern HRESULT get_system_fontcollection(IDWriteFactory7 *factory, DWRITE_FONT_FAMILY_MODEL family_model,
 304         IDWriteFontCollection **collection) DECLSPEC_HIDDEN;
 305 extern HRESULT get_eudc_fontcollection(IDWriteFactory7 *factory, IDWriteFontCollection3 **collection) DECLSPEC_HIDDEN;
 306 extern IDWriteTextAnalyzer2 *get_text_analyzer(void) DECLSPEC_HIDDEN;
 307 extern HRESULT create_font_file(IDWriteFontFileLoader *loader, const void *reference_key, UINT32 key_size, IDWriteFontFile **font_file) DECLSPEC_HIDDEN;
 308 extern void    init_local_fontfile_loader(void) DECLSPEC_HIDDEN;
 309 extern IDWriteFontFileLoader *get_local_fontfile_loader(void) DECLSPEC_HIDDEN;
 310 extern HRESULT create_fontface(const struct fontface_desc *desc, struct list *cached_list,
 311         IDWriteFontFace5 **fontface) DECLSPEC_HIDDEN;
 312 extern HRESULT create_font_collection(IDWriteFactory7 *factory, IDWriteFontFileEnumerator *enumerator, BOOL is_system,
 313        IDWriteFontCollection3 **collection) DECLSPEC_HIDDEN;
 314 extern HRESULT create_glyphrunanalysis(const struct glyphrunanalysis_desc*,IDWriteGlyphRunAnalysis**) DECLSPEC_HIDDEN;
 315 extern BOOL    is_system_collection(IDWriteFontCollection*) DECLSPEC_HIDDEN;
 316 extern HRESULT get_local_refkey(const WCHAR*,const FILETIME*,void**,UINT32*) DECLSPEC_HIDDEN;
 317 extern HRESULT get_filestream_from_file(IDWriteFontFile*,IDWriteFontFileStream**) DECLSPEC_HIDDEN;
 318 extern BOOL    is_face_type_supported(DWRITE_FONT_FACE_TYPE) DECLSPEC_HIDDEN;
 319 extern HRESULT get_family_names_from_stream(IDWriteFontFileStream*,UINT32,DWRITE_FONT_FACE_TYPE,IDWriteLocalizedStrings**) DECLSPEC_HIDDEN;
 320 extern HRESULT create_colorglyphenum(D2D1_POINT_2F origin, const DWRITE_GLYPH_RUN *run, const DWRITE_GLYPH_RUN_DESCRIPTION *desc,
 321         DWRITE_GLYPH_IMAGE_FORMATS formats, DWRITE_MEASURING_MODE mode, const DWRITE_MATRIX *transform, UINT32 palette,
 322         IDWriteColorGlyphRunEnumerator1 **enumerator) DECLSPEC_HIDDEN;
 323 extern BOOL lb_is_newline_char(WCHAR) DECLSPEC_HIDDEN;
 324 extern HRESULT create_system_fontfallback(IDWriteFactory7 *factory, IDWriteFontFallback1 **fallback) DECLSPEC_HIDDEN;
 325 extern void release_system_fontfallback(IDWriteFontFallback1 *fallback) DECLSPEC_HIDDEN;
 326 extern HRESULT create_fontfallback_builder(IDWriteFactory7 *factory, IDWriteFontFallbackBuilder **builder) DECLSPEC_HIDDEN;
 327 extern HRESULT create_matching_font(IDWriteFontCollection*,const WCHAR*,DWRITE_FONT_WEIGHT,DWRITE_FONT_STYLE,DWRITE_FONT_STRETCH,
 328     IDWriteFont**) DECLSPEC_HIDDEN;
 329 extern HRESULT create_fontfacereference(IDWriteFactory7 *factory, IDWriteFontFile *file, UINT32 face_index,
 330         DWRITE_FONT_SIMULATIONS simulations, DWRITE_FONT_AXIS_VALUE const *axis_values, UINT32 axis_values_count,
 331         IDWriteFontFaceReference1 **reference) DECLSPEC_HIDDEN;
 332 extern HRESULT factory_get_cached_fontface(IDWriteFactory7 *factory, IDWriteFontFile * const *files, UINT32 num_files,
 333         DWRITE_FONT_SIMULATIONS simulations, struct list **cache, REFIID riid, void **obj) DECLSPEC_HIDDEN;
 334 extern void factory_detach_fontcollection(IDWriteFactory7 *factory, IDWriteFontCollection3 *collection) DECLSPEC_HIDDEN;
 335 extern void factory_detach_gdiinterop(IDWriteFactory7 *factory, IDWriteGdiInterop1 *interop) DECLSPEC_HIDDEN;
 336 extern struct fontfacecached *factory_cache_fontface(IDWriteFactory7 *factory, struct list *fontfaces,
 337         IDWriteFontFace5 *fontface) DECLSPEC_HIDDEN;
 338 extern void    get_logfont_from_font(IDWriteFont*,LOGFONTW*) DECLSPEC_HIDDEN;
 339 extern void    get_logfont_from_fontface(IDWriteFontFace*,LOGFONTW*) DECLSPEC_HIDDEN;
 340 extern HRESULT get_fontsig_from_font(IDWriteFont*,FONTSIGNATURE*) DECLSPEC_HIDDEN;
 341 extern HRESULT get_fontsig_from_fontface(IDWriteFontFace*,FONTSIGNATURE*) DECLSPEC_HIDDEN;
 342 extern HRESULT create_gdiinterop(IDWriteFactory7 *factory, IDWriteGdiInterop1 **interop) DECLSPEC_HIDDEN;
 343 extern void fontface_detach_from_cache(IDWriteFontFace5 *fontface) DECLSPEC_HIDDEN;
 344 extern void factory_lock(IDWriteFactory7 *factory) DECLSPEC_HIDDEN;
 345 extern void factory_unlock(IDWriteFactory7 *factory) DECLSPEC_HIDDEN;
 346 extern HRESULT create_inmemory_fileloader(IDWriteInMemoryFontFileLoader **loader) DECLSPEC_HIDDEN;
 347 extern HRESULT create_font_resource(IDWriteFactory7 *factory, IDWriteFontFile *file, UINT32 face_index,
 348         IDWriteFontResource **resource) DECLSPEC_HIDDEN;
 349 extern HRESULT create_fontset_builder(IDWriteFactory7 *factory, IDWriteFontSetBuilder2 **ret) DECLSPEC_HIDDEN;
 350 extern HRESULT compute_glyph_origins(DWRITE_GLYPH_RUN const *run, DWRITE_MEASURING_MODE measuring_mode,
 351         D2D1_POINT_2F baseline_origin, DWRITE_MATRIX const *transform, D2D1_POINT_2F *origins) DECLSPEC_HIDDEN;
 352 extern HRESULT create_font_collection_from_set(IDWriteFactory7 *factory, IDWriteFontSet *set,
 353         DWRITE_FONT_FAMILY_MODEL family_model, REFGUID riid, void **ret) DECLSPEC_HIDDEN;
 354 extern HRESULT create_system_fontset(IDWriteFactory7 *factory, REFIID riid, void **obj) DECLSPEC_HIDDEN;
 355
 356 struct dwrite_fontface;
 357
 358 extern float fontface_get_scaled_design_advance(struct dwrite_fontface *fontface, DWRITE_MEASURING_MODE measuring_mode,
 359         float emsize, float ppdip, const DWRITE_MATRIX *transform, UINT16 glyph, BOOL is_sideways) DECLSPEC_HIDDEN;
 360 extern struct dwrite_fontface *unsafe_impl_from_IDWriteFontFace(IDWriteFontFace *iface) DECLSPEC_HIDDEN;
 361
 362 struct dwrite_textformat_data
 363 {
 364     WCHAR *family_name;
 365     unsigned int family_len;
 366     WCHAR *locale;
 367     unsigned int locale_len;
 368
 369     DWRITE_FONT_WEIGHT weight;
 370     DWRITE_FONT_STYLE style;
 371     DWRITE_FONT_STRETCH stretch;
 372
 373     DWRITE_PARAGRAPH_ALIGNMENT paralign;
 374     DWRITE_READING_DIRECTION readingdir;
 375     DWRITE_WORD_WRAPPING wrapping;
 376     BOOL last_line_wrapping;
 377     DWRITE_TEXT_ALIGNMENT textalignment;
 378     DWRITE_FLOW_DIRECTION flow;
 379     DWRITE_VERTICAL_GLYPH_ORIENTATION vertical_orientation;
 380     DWRITE_OPTICAL_ALIGNMENT optical_alignment;
 381     DWRITE_LINE_SPACING spacing;
 382     DWRITE_AUTOMATIC_FONT_AXES automatic_axes;
 383
 384     float fontsize;
 385     float tabstop;
 386
 387     DWRITE_TRIMMING trimming;
 388     IDWriteInlineObject *trimmingsign;
 389
 390     IDWriteFontCollection *collection;
 391     IDWriteFontFallback *fallback;
 392
 393     DWRITE_FONT_AXIS_VALUE *axis_values;
 394     unsigned int axis_values_count;
 395 };
 396
 397 struct dwrite_textformat
 398 {
 399     IDWriteTextFormat3 IDWriteTextFormat3_iface;
 400     LONG refcount;
 401     struct dwrite_textformat_data format;
 402 };
 403
 404 struct dwrite_textformat *unsafe_impl_from_IDWriteTextFormat(IDWriteTextFormat *iface) DECLSPEC_HIDDEN;
 405 void release_format_data(struct dwrite_textformat_data *data) DECLSPEC_HIDDEN;
 406
 407 HRESULT format_set_vertical_orientation(struct dwrite_textformat_data *format,
 408         DWRITE_VERTICAL_GLYPH_ORIENTATION orientation, BOOL *changed) DECLSPEC_HIDDEN;
 409 HRESULT format_set_fontfallback(struct dwrite_textformat_data *format, IDWriteFontFallback *fallback) DECLSPEC_HIDDEN;
 410 HRESULT format_get_fontfallback(const struct dwrite_textformat_data *format, IDWriteFontFallback **fallback) DECLSPEC_HIDDEN;
 411 HRESULT format_set_font_axisvalues(struct dwrite_textformat_data *format,
 412         DWRITE_FONT_AXIS_VALUE const *axis_values, unsigned int num_values) DECLSPEC_HIDDEN;
 413 HRESULT format_get_font_axisvalues(struct dwrite_textformat_data *format,
 414         DWRITE_FONT_AXIS_VALUE *axis_values, unsigned int num_values) DECLSPEC_HIDDEN;
 415 HRESULT format_set_optical_alignment(struct dwrite_textformat_data *format,
 416         DWRITE_OPTICAL_ALIGNMENT alignment) DECLSPEC_HIDDEN;
 417 HRESULT format_set_trimming(struct dwrite_textformat_data *format, DWRITE_TRIMMING const *trimming,
 418         IDWriteInlineObject *trimming_sign, BOOL *changed) DECLSPEC_HIDDEN;
 419 HRESULT format_set_flowdirection(struct dwrite_textformat_data *format,
 420         DWRITE_FLOW_DIRECTION direction, BOOL *changed) DECLSPEC_HIDDEN;
 421 HRESULT format_set_readingdirection(struct dwrite_textformat_data *format,
 422         DWRITE_READING_DIRECTION direction, BOOL *changed) DECLSPEC_HIDDEN;
 423 HRESULT format_set_wordwrapping(struct dwrite_textformat_data *format, DWRITE_WORD_WRAPPING wrapping,
 424         BOOL *changed) DECLSPEC_HIDDEN;
 425 HRESULT format_set_paralignment(struct dwrite_textformat_data *format,
 426         DWRITE_PARAGRAPH_ALIGNMENT alignment, BOOL *changed) DECLSPEC_HIDDEN;
 427 HRESULT format_set_textalignment(struct dwrite_textformat_data *format, DWRITE_TEXT_ALIGNMENT alignment,
 428         BOOL *changed) DECLSPEC_HIDDEN;
 429 HRESULT format_set_linespacing(struct dwrite_textformat_data *format,
 430         DWRITE_LINE_SPACING const *spacing, BOOL *changed) DECLSPEC_HIDDEN;
 431
 432 /* Opentype font table functions */
 433 struct dwrite_font_props
 434 {
 435     DWRITE_FONT_STYLE style;
 436     DWRITE_FONT_STRETCH stretch;
 437     DWRITE_FONT_WEIGHT weight;
 438     DWRITE_PANOSE panose;
 439     FONTSIGNATURE fontsig;
 440     LOGFONTW lf;
 441     UINT32 flags;
 442     float slant_angle;
 443 };
 444
 445 struct file_stream_desc {
 446     IDWriteFontFileStream *stream;
 447     DWRITE_FONT_FACE_TYPE face_type;
 448     UINT32 face_index;
 449 };
 450
 451 extern const void* get_fontface_table(IDWriteFontFace5 *fontface, UINT32 tag,
 452         struct dwrite_fonttable *table) DECLSPEC_HIDDEN;
 453
 454 struct tag_array
 455 {
 456     unsigned int *tags;
 457     size_t capacity;
 458     size_t count;
 459 };
 460
 461 struct ot_gsubgpos_table
 462 {
 463     struct dwrite_fonttable table;
 464     unsigned int script_list;
 465     unsigned int feature_list;
 466     unsigned int lookup_list;
 467 };
 468
 469 struct dwrite_var_axis
 470 {
 471     DWRITE_FONT_AXIS_TAG tag;
 472     float default_value;
 473     float min_value;
 474     float max_value;
 475     unsigned int attributes;
 476 };
 477
 478 extern HRESULT opentype_analyze_font(IDWriteFontFileStream*,BOOL*,DWRITE_FONT_FILE_TYPE*,DWRITE_FONT_FACE_TYPE*,UINT32*) DECLSPEC_HIDDEN;
 479 extern HRESULT opentype_try_get_font_table(const struct file_stream_desc *stream_desc, UINT32 tag, const void **data,
 480         void **context, UINT32 *size, BOOL *exists) DECLSPEC_HIDDEN;
 481 extern void opentype_get_font_properties(const struct file_stream_desc *stream_desc,
 482         struct dwrite_font_props *props) DECLSPEC_HIDDEN;
 483 extern void opentype_get_font_metrics(struct file_stream_desc*,DWRITE_FONT_METRICS1*,DWRITE_CARET_METRICS*) DECLSPEC_HIDDEN;
 484 extern void opentype_get_font_typo_metrics(struct file_stream_desc *stream_desc, unsigned int *ascent,
 485         unsigned int *descent) DECLSPEC_HIDDEN;
 486 extern HRESULT opentype_get_font_info_strings(const struct file_stream_desc *stream_desc,
 487         DWRITE_INFORMATIONAL_STRING_ID id, IDWriteLocalizedStrings **strings) DECLSPEC_HIDDEN;
 488 extern HRESULT opentype_get_font_familyname(const struct file_stream_desc *desc, DWRITE_FONT_FAMILY_MODEL family_model,
 489         IDWriteLocalizedStrings **names) DECLSPEC_HIDDEN;
 490 extern HRESULT opentype_get_font_facename(struct file_stream_desc*,WCHAR*,IDWriteLocalizedStrings**) DECLSPEC_HIDDEN;
 491 extern void opentype_get_typographic_features(struct ot_gsubgpos_table *table, unsigned int script_index,
 492         unsigned int language_index, struct tag_array *tags) DECLSPEC_HIDDEN;
 493 extern BOOL opentype_get_vdmx_size(const struct dwrite_fonttable *table, INT ppem, UINT16 *ascent,
 494         UINT16 *descent) DECLSPEC_HIDDEN;
 495 extern unsigned int opentype_get_cpal_palettecount(const struct dwrite_fonttable *table) DECLSPEC_HIDDEN;
 496 extern unsigned int opentype_get_cpal_paletteentrycount(const struct dwrite_fonttable *table) DECLSPEC_HIDDEN;
 497 extern HRESULT opentype_get_cpal_entries(const struct dwrite_fonttable *table, unsigned int palette,
 498         unsigned int first_entry_index, unsigned int entry_count, DWRITE_COLOR_F *entries) DECLSPEC_HIDDEN;
 499 extern UINT32 opentype_get_glyph_image_formats(IDWriteFontFace5 *fontface) DECLSPEC_HIDDEN;
 500 extern DWRITE_CONTAINER_TYPE opentype_analyze_container_type(void const *, UINT32) DECLSPEC_HIDDEN;
 501 extern HRESULT opentype_get_kerning_pairs(struct dwrite_fontface *fontface, unsigned int count,
 502         const UINT16 *glyphs, INT32 *values) DECLSPEC_HIDDEN;
 503 extern BOOL opentype_has_kerning_pairs(struct dwrite_fontface *fontface) DECLSPEC_HIDDEN;
 504 extern HRESULT opentype_get_font_var_axis(const struct file_stream_desc *stream_desc, struct dwrite_var_axis **axis,
 505         unsigned int *axis_count) DECLSPEC_HIDDEN;
 506
 507 struct dwrite_colorglyph {
 508     USHORT layer; /* [0, num_layers) index indicating current layer */
 509     /* base glyph record data, set once on initialization */
 510     USHORT first_layer;
 511     USHORT num_layers;
 512     /* current layer record data, updated every time glyph is switched to next layer */
 513     UINT16 glyph;
 514     UINT16 palette_index;
 515 };
 516
 517 extern HRESULT opentype_get_colr_glyph(const struct dwrite_fonttable *table, UINT16 glyph,
 518         struct dwrite_colorglyph *color_glyph) DECLSPEC_HIDDEN;
 519 extern void opentype_colr_next_glyph(const struct dwrite_fonttable *table,
 520         struct dwrite_colorglyph *color_glyph) DECLSPEC_HIDDEN;
 521
 522 enum gasp_flags {
 523     GASP_GRIDFIT             = 0x0001,
 524     GASP_DOGRAY              = 0x0002,
 525     GASP_SYMMETRIC_GRIDFIT   = 0x0004,
 526     GASP_SYMMETRIC_SMOOTHING = 0x0008,
 527 };
 528
 529 extern unsigned int opentype_get_gasp_flags(const struct dwrite_fonttable *gasp, float emsize) DECLSPEC_HIDDEN;
 530
 531 /* BiDi helpers */
 532 extern HRESULT bidi_computelevels(const WCHAR*,UINT32,UINT8,UINT8*,UINT8*) DECLSPEC_HIDDEN;
 533
 534 struct dwrite_glyphbitmap
 535 {
 536     DWORD simulations;
 537     float emsize;
 538     UINT16 glyph;
 539     INT pitch;
 540     RECT bbox;
 541     BYTE *buf;
 542     DWRITE_MATRIX *m;
 543 };
 544
 545 enum dwrite_outline_tags
 546 {
 547     OUTLINE_BEGIN_FIGURE,
 548     OUTLINE_END_FIGURE,
 549     OUTLINE_LINE,
 550     OUTLINE_BEZIER,
 551 };
 552
 553 struct dwrite_outline
 554 {
 555     struct
 556     {
 557         unsigned char *values;
 558         size_t count;
 559         size_t size;
 560     } tags;
 561
 562     struct
 563     {
 564         D2D1_POINT_2F *values;
 565         size_t count;
 566         size_t size;
 567     } points;
 568 };
 569
 570 /* Glyph shaping */
 571 enum SCRIPT_JUSTIFY
 572 {
 573     SCRIPT_JUSTIFY_NONE,
 574     SCRIPT_JUSTIFY_ARABIC_BLANK,
 575     SCRIPT_JUSTIFY_CHARACTER,
 576     SCRIPT_JUSTIFY_RESERVED1,
 577     SCRIPT_JUSTIFY_BLANK,
 578     SCRIPT_JUSTIFY_RESERVED2,
 579     SCRIPT_JUSTIFY_RESERVED3,
 580     SCRIPT_JUSTIFY_ARABIC_NORMAL,
 581     SCRIPT_JUSTIFY_ARABIC_KASHIDA,
 582     SCRIPT_JUSTIFY_ARABIC_ALEF,
 583     SCRIPT_JUSTIFY_ARABIC_HA,
 584     SCRIPT_JUSTIFY_ARABIC_RA,
 585     SCRIPT_JUSTIFY_ARABIC_BA,
 586     SCRIPT_JUSTIFY_ARABIC_BARA,
 587     SCRIPT_JUSTIFY_ARABIC_SEEN,
 588     SCRIPT_JUSTIFY_ARABIC_SEEN_M
 589 };
 590
 591 struct scriptshaping_cache
 592 {
 593     const struct shaping_font_ops *font;
 594     void *context;
 595     UINT16 upem;
 596
 597     struct ot_gsubgpos_table gsub;
 598     struct ot_gsubgpos_table gpos;
 599
 600     struct
 601     {
 602         struct dwrite_fonttable table;
 603         unsigned int classdef;
 604         unsigned int markattachclassdef;
 605         unsigned int markglyphsetdef;
 606     } gdef;
 607 };
 608
 609 struct shaping_glyph_info
 610 {
 611     /* Combined features mask. */
 612     unsigned int mask;
 613     /* Derived from glyph class, supplied by GDEF. */
 614     unsigned int props;
 615     /* Used for GPOS mark and cursive attachments. */
 616     int attach_chain;
 617     /* Only relevant for isClusterStart glyphs. Indicates text position for this cluster. */
 618     unsigned int start_text_idx;
 619     unsigned int codepoint;
 620 };
 621
 622 struct shaping_glyph_properties
 623 {
 624     UINT16 justification : 4;
 625     UINT16 isClusterStart : 1;
 626     UINT16 isDiacritic : 1;
 627     UINT16 isZeroWidthSpace : 1;
 628     UINT16 reserved : 1;
 629     UINT16 components : 4;
 630     UINT16 lig_component : 4;
 631 };
 632
 633 struct scriptshaping_context;
 634
 635 typedef void (*p_apply_context_lookup)(struct scriptshaping_context *context, unsigned int lookup_index);
 636
 637 enum shaping_feature_flags
 638 {
 639     FEATURE_GLOBAL = 0x1,
 640     FEATURE_GLOBAL_SEARCH = 0x2,
 641     FEATURE_MANUAL_ZWNJ = 0x4,
 642     FEATURE_MANUAL_ZWJ = 0x8,
 643     FEATURE_MANUAL_JOINERS = FEATURE_MANUAL_ZWNJ | FEATURE_MANUAL_ZWJ,
 644     FEATURE_HAS_FALLBACK = 0x10,
 645     FEATURE_NEEDS_FALLBACK = 0x20,
 646 };
 647
 648 struct shaping_feature
 649 {
 650     unsigned int tag;
 651     unsigned int index;
 652     unsigned int flags;
 653     unsigned int max_value;
 654     unsigned int default_value;
 655     unsigned int mask;
 656     unsigned int shift;
 657     unsigned int stage;
 658 };
 659
 660 #define MAX_SHAPING_STAGE 16
 661
 662 struct shaping_features;
 663
 664 typedef void (*stage_func)(struct scriptshaping_context *context,
 665         const struct shaping_features *features);
 666
 667 struct shaping_stage
 668 {
 669     stage_func func;
 670     unsigned int last_lookup;
 671 };
 672
 673 struct shaping_features
 674 {
 675     struct shaping_feature *features;
 676     size_t count;
 677     size_t capacity;
 678     unsigned int stage;
 679     struct shaping_stage stages[MAX_SHAPING_STAGE];
 680 };
 681
 682 struct shaper
 683 {
 684     void (*collect_features)(struct scriptshaping_context *context, struct shaping_features *features);
 685     void (*setup_masks)(struct scriptshaping_context *context, const struct shaping_features *features);
 686 };
 687
 688 extern const struct shaper arabic_shaper DECLSPEC_HIDDEN;
 689
 690 extern void shape_enable_feature(struct shaping_features *features, unsigned int tag,
 691         unsigned int flags) DECLSPEC_HIDDEN;
 692 extern void shape_add_feature_full(struct shaping_features *features, unsigned int tag,
 693         unsigned int flags, unsigned int value) DECLSPEC_HIDDEN;
 694 extern unsigned int shape_get_feature_1_mask(const struct shaping_features *features,
 695         unsigned int tag) DECLSPEC_HIDDEN;
 696 extern void shape_start_next_stage(struct shaping_features *features, stage_func func) DECLSPEC_HIDDEN;
 697
 698 struct scriptshaping_context
 699 {
 700     struct scriptshaping_cache *cache;
 701     const struct shaper *shaper;
 702     unsigned int script;
 703     UINT32 language_tag;
 704
 705     const WCHAR *text;
 706     unsigned int length;
 707     BOOL is_rtl;
 708     BOOL is_sideways;
 709
 710     union
 711     {
 712         struct
 713         {
 714             const UINT16 *glyphs;
 715             const DWRITE_SHAPING_GLYPH_PROPERTIES *glyph_props;
 716             DWRITE_SHAPING_TEXT_PROPERTIES *text_props;
 717             const UINT16 *clustermap;
 718             p_apply_context_lookup apply_context_lookup;
 719         } pos;
 720         struct
 721         {
 722             UINT16 *glyphs;
 723             DWRITE_SHAPING_GLYPH_PROPERTIES *glyph_props;
 724             DWRITE_SHAPING_TEXT_PROPERTIES *text_props;
 725             UINT16 *clustermap;
 726             p_apply_context_lookup apply_context_lookup;
 727             unsigned int max_glyph_count;
 728             unsigned int capacity;
 729             const WCHAR *digits;
 730         } subst;
 731         struct
 732         {
 733             UINT16 *glyphs;
 734             struct shaping_glyph_properties *glyph_props;
 735             DWRITE_SHAPING_TEXT_PROPERTIES *text_props;
 736             UINT16 *clustermap;
 737             p_apply_context_lookup apply_context_lookup;
 738         } buffer;
 739     } u;
 740
 741     const struct ot_gsubgpos_table *table; /* Either GSUB or GPOS. */
 742     struct
 743     {
 744         const DWRITE_TYPOGRAPHIC_FEATURES **features;
 745         const unsigned int *range_lengths;
 746         unsigned int range_count;
 747     } user_features;
 748     unsigned int global_mask;
 749     unsigned int lookup_mask; /* Currently processed feature mask, set in main loop. */
 750     unsigned int auto_zwj;
 751     unsigned int auto_zwnj;
 752     struct shaping_glyph_info *glyph_infos;
 753     unsigned int has_gpos_attachment : 1;
 754
 755     unsigned int cur;
 756     unsigned int glyph_count;
 757     unsigned int nesting_level_left;
 758
 759     float emsize;
 760     DWRITE_MEASURING_MODE measuring_mode;
 761     float *advances;
 762     DWRITE_GLYPH_OFFSET *offsets;
 763 };
 764
 765 struct shaping_font_ops
 766 {
 767     void (*grab_font_table)(void *context, UINT32 table, const BYTE **data, UINT32 *size, void **data_context);
 768     void (*release_font_table)(void *context, void *data_context);
 769     UINT16 (*get_font_upem)(void *context);
 770     BOOL (*has_glyph)(void *context, unsigned int codepoint);
 771     UINT16 (*get_glyph)(void *context, unsigned int codepoint);
 772 };
 773
 774 extern struct scriptshaping_cache *create_scriptshaping_cache(void *context,
 775         const struct shaping_font_ops *font_ops) DECLSPEC_HIDDEN;
 776 extern void release_scriptshaping_cache(struct scriptshaping_cache*) DECLSPEC_HIDDEN;
 777 extern struct scriptshaping_cache *fontface_get_shaping_cache(struct dwrite_fontface *fontface) DECLSPEC_HIDDEN;
 778
 779 extern void opentype_layout_scriptshaping_cache_init(struct scriptshaping_cache *cache) DECLSPEC_HIDDEN;
 780 extern unsigned int opentype_layout_find_script(const struct scriptshaping_cache *cache, unsigned int kind,
 781         DWORD tag, unsigned int *script_index) DECLSPEC_HIDDEN;
 782 extern unsigned int opentype_layout_find_language(const struct scriptshaping_cache *cache, unsigned int kind,
 783         DWORD tag, unsigned int script_index, unsigned int *language_index) DECLSPEC_HIDDEN;
 784 extern void opentype_layout_apply_gsub_features(struct scriptshaping_context *context, unsigned int script_index,
 785         unsigned int language_index, struct shaping_features *features) DECLSPEC_HIDDEN;
 786 extern void opentype_layout_apply_gpos_features(struct scriptshaping_context *context, unsigned int script_index,
 787         unsigned int language_index, struct shaping_features *features) DECLSPEC_HIDDEN;
 788 extern BOOL opentype_layout_check_feature(struct scriptshaping_context *context, unsigned int script_index,
 789         unsigned int language_index, struct shaping_feature *feature, unsigned int glyph_count,
 790         const UINT16 *glyphs, UINT8 *feature_applies) DECLSPEC_HIDDEN;
 791 extern void opentype_layout_unsafe_to_break(struct scriptshaping_context *context, unsigned int start,
 792         unsigned int end) DECLSPEC_HIDDEN;
 793 extern BOOL opentype_has_vertical_variants(struct dwrite_fontface *fontface) DECLSPEC_HIDDEN;
 794 extern HRESULT opentype_get_vertical_glyph_variants(struct dwrite_fontface *fontface, unsigned int glyph_count,
 795         const UINT16 *nominal_glyphs, UINT16 *glyphs) DECLSPEC_HIDDEN;
 796
 797 extern HRESULT shape_get_glyphs(struct scriptshaping_context *context, const unsigned int *scripts) DECLSPEC_HIDDEN;
 798 extern HRESULT shape_get_positions(struct scriptshaping_context *context, const unsigned int *scripts) DECLSPEC_HIDDEN;
 799 extern HRESULT shape_get_typographic_features(struct scriptshaping_context *context, const unsigned int *scripts,
 800         unsigned int max_tagcount, unsigned int *actual_tagcount, unsigned int *tags) DECLSPEC_HIDDEN;
 801 extern HRESULT shape_check_typographic_feature(struct scriptshaping_context *context, const unsigned int *scripts,
 802         unsigned int tag, unsigned int glyph_count, const UINT16 *glyphs, UINT8 *feature_applies) DECLSPEC_HIDDEN;
 803
 804 struct font_data_context;
 805 extern HMODULE dwrite_module DECLSPEC_HIDDEN;
 806
 807 extern void dwrite_fontface_get_glyph_bbox(IDWriteFontFace *fontface, struct dwrite_glyphbitmap *bitmap) DECLSPEC_HIDDEN;