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wine/dlls/dwrite/dwrite_private.h
Nikolay Sivov b2d9d552c0 dwrite: Keep current lookup feature mask in context. 
Lookups referenced from context-based lookups need to have access to
original feature mask, set it once instead of propagating it on every
recursive call. It's used for input matching and parametrized cases
like alternate substitutions.

Signed-off-by: Nikolay Sivov <nsivov@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
2020-06-12 17:16:26 +02:00

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/*
* Copyright 2012 Nikolay Sivov for CodeWeavers
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include "dwrite_3.h"
#include "d2d1.h"
#include "wine/debug.h"
#include "wine/heap.h"
#include "wine/list.h"
#include "wine/unicode.h"
#define MS_GSUB_TAG DWRITE_MAKE_OPENTYPE_TAG('G','S','U','B')
#define MS_GPOS_TAG DWRITE_MAKE_OPENTYPE_TAG('G','P','O','S')
static const DWRITE_MATRIX identity =
{
1.0f, 0.0f,
0.0f, 1.0f,
0.0f, 0.0f
};
static inline LPWSTR heap_strdupW(const WCHAR *str)
{
LPWSTR ret = NULL;
if(str) {
DWORD size;
size = (strlenW(str)+1)*sizeof(WCHAR);
ret = heap_alloc(size);
if(ret)
memcpy(ret, str, size);
}
return ret;
}
static inline LPWSTR heap_strdupnW(const WCHAR *str, UINT32 len)
{
WCHAR *ret = NULL;
if (len)
{
ret = heap_alloc((len+1)*sizeof(WCHAR));
if(ret)
{
memcpy(ret, str, len*sizeof(WCHAR));
ret[len] = 0;
}
}
return ret;
}
static inline const char *debugstr_range(const DWRITE_TEXT_RANGE *range)
{
return wine_dbg_sprintf("%u:%u", range->startPosition, range->length);
}
static inline const char *debugstr_matrix(const DWRITE_MATRIX *m)
{
if (!m) return "(null)";
return wine_dbg_sprintf("{%.2f,%.2f,%.2f,%.2f,%.2f,%.2f}", m->m11, m->m12, m->m21, m->m22,
m->dx, m->dy);
}
static inline BOOL dwrite_array_reserve(void **elements, size_t *capacity, size_t count, size_t size)
{
size_t new_capacity, max_capacity;
void *new_elements;
if (count <= *capacity)
return TRUE;
max_capacity = ~(SIZE_T)0 / size;
if (count > max_capacity)
return FALSE;
new_capacity = max(4, *capacity);
while (new_capacity < count && new_capacity <= max_capacity / 2)
new_capacity *= 2;
if (new_capacity < count)
new_capacity = max_capacity;
if (!(new_elements = heap_realloc(*elements, new_capacity * size)))
return FALSE;
*elements = new_elements;
*capacity = new_capacity;
return TRUE;
}
static inline const char *debugstr_tag(DWORD tag)
{
return debugstr_an((char *)&tag, 4);
}
const char *debugstr_sa_script(UINT16) DECLSPEC_HIDDEN;
static inline unsigned short get_table_entry(const unsigned short *table, WCHAR ch)
{
return table[table[table[ch >> 8] + ((ch >> 4) & 0x0f)] + (ch & 0xf)];
}
static inline FLOAT get_scaled_advance_width(INT32 advance, FLOAT emSize, const DWRITE_FONT_METRICS *metrics)
{
return (FLOAT)advance * emSize / (FLOAT)metrics->designUnitsPerEm;
}
static inline BOOL is_simulation_valid(DWRITE_FONT_SIMULATIONS simulations)
{
return (simulations & ~(DWRITE_FONT_SIMULATIONS_NONE | DWRITE_FONT_SIMULATIONS_BOLD |
DWRITE_FONT_SIMULATIONS_OBLIQUE)) == 0;
}
struct textlayout_desc
{
IDWriteFactory7 *factory;
const WCHAR *string;
UINT32 length;
IDWriteTextFormat *format;
FLOAT max_width;
FLOAT max_height;
BOOL is_gdi_compatible;
/* fields below are only meaningful for gdi-compatible layout */
FLOAT ppdip;
const DWRITE_MATRIX *transform;
BOOL use_gdi_natural;
};
struct glyphrunanalysis_desc
{
const DWRITE_GLYPH_RUN *run;
const DWRITE_MATRIX *transform;
DWRITE_RENDERING_MODE1 rendering_mode;
DWRITE_MEASURING_MODE measuring_mode;
DWRITE_GRID_FIT_MODE gridfit_mode;
DWRITE_TEXT_ANTIALIAS_MODE aa_mode;
D2D_POINT_2F origin;
};
struct fontface_desc
{
IDWriteFactory7 *factory;
DWRITE_FONT_FACE_TYPE face_type;
IDWriteFontFile * const *files;
IDWriteFontFileStream *stream;
UINT32 files_number;
UINT32 index;
DWRITE_FONT_SIMULATIONS simulations;
struct dwrite_font_data *font_data; /* could be NULL when face is created directly with IDWriteFactory::CreateFontFace() */
};
struct dwrite_fonttable
{
const BYTE *data;
void *context;
UINT32 size;
BOOL exists;
};
struct fontfacecached
{
struct list entry;
IDWriteFontFace5 *fontface;
};
#define GLYPH_BLOCK_SHIFT 8
#define GLYPH_BLOCK_SIZE (1UL << GLYPH_BLOCK_SHIFT)
#define GLYPH_BLOCK_MASK (GLYPH_BLOCK_SIZE - 1)
#define GLYPH_MAX 65536
enum font_flags
{
FONT_IS_SYMBOL = 1 << 0,
FONT_IS_MONOSPACED = 1 << 1,
FONT_IS_COLORED = 1 << 2, /* CPAL/COLR support */
FONTFACE_HAS_KERNING_PAIRS = 1 << 3,
FONTFACE_HAS_VERTICAL_VARIANTS = 1 << 4
};
struct dwrite_cmap;
typedef UINT16 (*p_cmap_get_glyph_func)(const struct dwrite_cmap *cmap, unsigned int ch);
typedef unsigned int (*p_cmap_get_ranges_func)(const struct dwrite_cmap *cmap, unsigned int max_count,
DWRITE_UNICODE_RANGE *ranges);
struct dwrite_cmap
{
const void *data;
union
{
struct
{
unsigned int seg_count;
unsigned int glyph_id_array_len;
const UINT16 *ends;
const UINT16 *starts;
const UINT16 *id_delta;
const UINT16 *id_range_offset;
const UINT16 *glyph_id_array;
} format4;
struct
{
unsigned int first;
unsigned int last;
} format6_10;
struct
{
unsigned int group_count;
} format12_13;
} u;
p_cmap_get_glyph_func get_glyph;
p_cmap_get_ranges_func get_ranges;
unsigned short symbol : 1;
IDWriteFontFileStream *stream;
void *table_context;
};
extern void dwrite_cmap_init(struct dwrite_cmap *cmap, IDWriteFontFile *file, unsigned int face_index,
DWRITE_FONT_FACE_TYPE face_type) DECLSPEC_HIDDEN;
extern void dwrite_cmap_release(struct dwrite_cmap *cmap) DECLSPEC_HIDDEN;
extern UINT16 opentype_cmap_get_glyph(const struct dwrite_cmap *cmap, unsigned int ch) DECLSPEC_HIDDEN;
extern HRESULT opentype_cmap_get_unicode_ranges(const struct dwrite_cmap *cmap, unsigned int max_count,
DWRITE_UNICODE_RANGE *ranges, unsigned int *count) DECLSPEC_HIDDEN;
struct dwrite_fontface
{
IDWriteFontFace5 IDWriteFontFace5_iface;
IDWriteFontFaceReference IDWriteFontFaceReference_iface;
LONG refcount;
IDWriteFontFileStream *stream;
IDWriteFontFile **files;
UINT32 file_count;
UINT32 index;
IDWriteFactory7 *factory;
struct fontfacecached *cached;
USHORT simulations;
DWRITE_FONT_FACE_TYPE type;
DWRITE_FONT_METRICS1 metrics;
DWRITE_CARET_METRICS caret;
struct
{
unsigned int ascent;
unsigned int descent;
} typo_metrics;
UINT32 flags;
struct dwrite_cmap cmap;
struct dwrite_fonttable vdmx;
struct dwrite_fonttable gasp;
struct dwrite_fonttable cpal;
struct dwrite_fonttable colr;
DWRITE_GLYPH_METRICS *glyphs[GLYPH_MAX/GLYPH_BLOCK_SIZE];
DWRITE_FONT_STYLE style;
DWRITE_FONT_STRETCH stretch;
DWRITE_FONT_WEIGHT weight;
DWRITE_PANOSE panose;
FONTSIGNATURE fontsig;
UINT32 glyph_image_formats;
IDWriteLocalizedStrings *info_strings[DWRITE_INFORMATIONAL_STRING_SUPPORTED_SCRIPT_LANGUAGE_TAG + 1];
IDWriteLocalizedStrings *family_names;
IDWriteLocalizedStrings *names;
struct scriptshaping_cache *shaping_cache;
LOGFONTW lf;
};
extern HRESULT create_numbersubstitution(DWRITE_NUMBER_SUBSTITUTION_METHOD,const WCHAR *locale,BOOL,IDWriteNumberSubstitution**) DECLSPEC_HIDDEN;
extern HRESULT create_textformat(const WCHAR*,IDWriteFontCollection*,DWRITE_FONT_WEIGHT,DWRITE_FONT_STYLE,DWRITE_FONT_STRETCH,
FLOAT,const WCHAR*,IDWriteTextFormat**) DECLSPEC_HIDDEN;
extern HRESULT create_textlayout(const struct textlayout_desc*,IDWriteTextLayout**) DECLSPEC_HIDDEN;
extern HRESULT create_trimmingsign(IDWriteFactory7 *factory, IDWriteTextFormat *format,
IDWriteInlineObject **sign) DECLSPEC_HIDDEN;
extern HRESULT create_typography(IDWriteTypography**) DECLSPEC_HIDDEN;
extern HRESULT create_localizedstrings(IDWriteLocalizedStrings**) DECLSPEC_HIDDEN;
extern HRESULT add_localizedstring(IDWriteLocalizedStrings*,const WCHAR*,const WCHAR*) DECLSPEC_HIDDEN;
extern HRESULT clone_localizedstrings(IDWriteLocalizedStrings *iface, IDWriteLocalizedStrings **strings) DECLSPEC_HIDDEN;
extern void set_en_localizedstring(IDWriteLocalizedStrings*,const WCHAR*) DECLSPEC_HIDDEN;
extern void sort_localizedstrings(IDWriteLocalizedStrings*) DECLSPEC_HIDDEN;
extern HRESULT get_system_fontcollection(IDWriteFactory7 *factory, IDWriteFontCollection1 **collection) DECLSPEC_HIDDEN;
extern HRESULT get_eudc_fontcollection(IDWriteFactory7 *factory, IDWriteFontCollection3 **collection) DECLSPEC_HIDDEN;
extern IDWriteTextAnalyzer *get_text_analyzer(void) DECLSPEC_HIDDEN;
extern HRESULT create_font_file(IDWriteFontFileLoader *loader, const void *reference_key, UINT32 key_size, IDWriteFontFile **font_file) DECLSPEC_HIDDEN;
extern void init_local_fontfile_loader(void) DECLSPEC_HIDDEN;
extern IDWriteFontFileLoader *get_local_fontfile_loader(void) DECLSPEC_HIDDEN;
extern HRESULT create_fontface(const struct fontface_desc *desc, struct list *cached_list,
IDWriteFontFace5 **fontface) DECLSPEC_HIDDEN;
extern HRESULT create_font_collection(IDWriteFactory7 *factory, IDWriteFontFileEnumerator *enumerator, BOOL is_system,
IDWriteFontCollection3 **collection) DECLSPEC_HIDDEN;
extern HRESULT create_glyphrunanalysis(const struct glyphrunanalysis_desc*,IDWriteGlyphRunAnalysis**) DECLSPEC_HIDDEN;
extern BOOL is_system_collection(IDWriteFontCollection*) DECLSPEC_HIDDEN;
extern HRESULT get_local_refkey(const WCHAR*,const FILETIME*,void**,UINT32*) DECLSPEC_HIDDEN;
extern HRESULT get_filestream_from_file(IDWriteFontFile*,IDWriteFontFileStream**) DECLSPEC_HIDDEN;
extern BOOL is_face_type_supported(DWRITE_FONT_FACE_TYPE) DECLSPEC_HIDDEN;
extern HRESULT get_family_names_from_stream(IDWriteFontFileStream*,UINT32,DWRITE_FONT_FACE_TYPE,IDWriteLocalizedStrings**) DECLSPEC_HIDDEN;
extern HRESULT create_colorglyphenum(FLOAT,FLOAT,const DWRITE_GLYPH_RUN*,const DWRITE_GLYPH_RUN_DESCRIPTION*,DWRITE_MEASURING_MODE,
const DWRITE_MATRIX*,UINT32,IDWriteColorGlyphRunEnumerator**) DECLSPEC_HIDDEN;
extern BOOL lb_is_newline_char(WCHAR) DECLSPEC_HIDDEN;
extern HRESULT create_system_fontfallback(IDWriteFactory7 *factory, IDWriteFontFallback1 **fallback) DECLSPEC_HIDDEN;
extern void release_system_fontfallback(IDWriteFontFallback1 *fallback) DECLSPEC_HIDDEN;
extern HRESULT create_fontfallback_builder(IDWriteFactory7 *factory, IDWriteFontFallbackBuilder **builder) DECLSPEC_HIDDEN;
extern HRESULT create_matching_font(IDWriteFontCollection*,const WCHAR*,DWRITE_FONT_WEIGHT,DWRITE_FONT_STYLE,DWRITE_FONT_STRETCH,
IDWriteFont**) DECLSPEC_HIDDEN;
extern HRESULT create_fontfacereference(IDWriteFactory7 *factory, IDWriteFontFile *file, UINT32 face_index,
DWRITE_FONT_SIMULATIONS simulations, DWRITE_FONT_AXIS_VALUE const *axis_values, UINT32 axis_values_count,
IDWriteFontFaceReference1 **reference) DECLSPEC_HIDDEN;
extern HRESULT factory_get_cached_fontface(IDWriteFactory7 *factory, IDWriteFontFile * const *files, UINT32 num_files,
DWRITE_FONT_SIMULATIONS simulations, struct list **cache, REFIID riid, void **obj) DECLSPEC_HIDDEN;
extern void factory_detach_fontcollection(IDWriteFactory7 *factory, IDWriteFontCollection3 *collection) DECLSPEC_HIDDEN;
extern void factory_detach_gdiinterop(IDWriteFactory7 *factory, IDWriteGdiInterop1 *interop) DECLSPEC_HIDDEN;
extern struct fontfacecached *factory_cache_fontface(IDWriteFactory7 *factory, struct list *fontfaces,
IDWriteFontFace5 *fontface) DECLSPEC_HIDDEN;
extern void get_logfont_from_font(IDWriteFont*,LOGFONTW*) DECLSPEC_HIDDEN;
extern void get_logfont_from_fontface(IDWriteFontFace*,LOGFONTW*) DECLSPEC_HIDDEN;
extern HRESULT get_fontsig_from_font(IDWriteFont*,FONTSIGNATURE*) DECLSPEC_HIDDEN;
extern HRESULT get_fontsig_from_fontface(IDWriteFontFace*,FONTSIGNATURE*) DECLSPEC_HIDDEN;
extern HRESULT create_gdiinterop(IDWriteFactory7 *factory, IDWriteGdiInterop1 **interop) DECLSPEC_HIDDEN;
extern void fontface_detach_from_cache(IDWriteFontFace5 *fontface) DECLSPEC_HIDDEN;
extern void factory_lock(IDWriteFactory7 *factory) DECLSPEC_HIDDEN;
extern void factory_unlock(IDWriteFactory7 *factory) DECLSPEC_HIDDEN;
extern HRESULT create_inmemory_fileloader(IDWriteInMemoryFontFileLoader **loader) DECLSPEC_HIDDEN;
extern HRESULT create_font_resource(IDWriteFactory7 *factory, IDWriteFontFile *file, UINT32 face_index,
IDWriteFontResource **resource) DECLSPEC_HIDDEN;
struct dwrite_fontface;
extern float fontface_get_scaled_design_advance(struct dwrite_fontface *fontface, DWRITE_MEASURING_MODE measuring_mode,
float emsize, float ppdip, const DWRITE_MATRIX *transform, UINT16 glyph, BOOL is_sideways) DECLSPEC_HIDDEN;
extern struct dwrite_fontface *unsafe_impl_from_IDWriteFontFace(IDWriteFontFace *iface) DECLSPEC_HIDDEN;
/* Opentype font table functions */
struct dwrite_font_props
{
DWRITE_FONT_STYLE style;
DWRITE_FONT_STRETCH stretch;
DWRITE_FONT_WEIGHT weight;
DWRITE_PANOSE panose;
FONTSIGNATURE fontsig;
LOGFONTW lf;
UINT32 flags;
};
struct file_stream_desc {
IDWriteFontFileStream *stream;
DWRITE_FONT_FACE_TYPE face_type;
UINT32 face_index;
};
extern const void* get_fontface_table(IDWriteFontFace5 *fontface, UINT32 tag,
struct dwrite_fonttable *table) DECLSPEC_HIDDEN;
struct tag_array
{
unsigned int *tags;
size_t capacity;
size_t count;
};
struct ot_gsubgpos_table
{
struct dwrite_fonttable table;
unsigned int script_list;
unsigned int feature_list;
unsigned int lookup_list;
};
extern HRESULT opentype_analyze_font(IDWriteFontFileStream*,BOOL*,DWRITE_FONT_FILE_TYPE*,DWRITE_FONT_FACE_TYPE*,UINT32*) DECLSPEC_HIDDEN;
extern HRESULT opentype_try_get_font_table(const struct file_stream_desc *stream_desc, UINT32 tag, const void **data,
void **context, UINT32 *size, BOOL *exists) DECLSPEC_HIDDEN;
extern void opentype_get_font_properties(struct file_stream_desc*,struct dwrite_font_props*) DECLSPEC_HIDDEN;
extern void opentype_get_font_metrics(struct file_stream_desc*,DWRITE_FONT_METRICS1*,DWRITE_CARET_METRICS*) DECLSPEC_HIDDEN;
extern void opentype_get_font_typo_metrics(struct file_stream_desc *stream_desc, unsigned int *ascent,
unsigned int *descent) DECLSPEC_HIDDEN;
extern HRESULT opentype_get_font_info_strings(const struct file_stream_desc *stream_desc,
DWRITE_INFORMATIONAL_STRING_ID id, IDWriteLocalizedStrings **strings) DECLSPEC_HIDDEN;
extern HRESULT opentype_get_font_familyname(struct file_stream_desc*,IDWriteLocalizedStrings**) DECLSPEC_HIDDEN;
extern HRESULT opentype_get_font_facename(struct file_stream_desc*,WCHAR*,IDWriteLocalizedStrings**) DECLSPEC_HIDDEN;
extern void opentype_get_typographic_features(struct ot_gsubgpos_table *table, unsigned int script_index,
unsigned int language_index, struct tag_array *tags) DECLSPEC_HIDDEN;
extern BOOL opentype_get_vdmx_size(const struct dwrite_fonttable *table, INT ppem, UINT16 *ascent,
UINT16 *descent) DECLSPEC_HIDDEN;
extern unsigned int opentype_get_cpal_palettecount(const struct dwrite_fonttable *table) DECLSPEC_HIDDEN;
extern unsigned int opentype_get_cpal_paletteentrycount(const struct dwrite_fonttable *table) DECLSPEC_HIDDEN;
extern HRESULT opentype_get_cpal_entries(const struct dwrite_fonttable *table, unsigned int palette,
unsigned int first_entry_index, unsigned int entry_count, DWRITE_COLOR_F *entries) DECLSPEC_HIDDEN;
extern BOOL opentype_has_vertical_variants(IDWriteFontFace5 *fontface) DECLSPEC_HIDDEN;
extern UINT32 opentype_get_glyph_image_formats(IDWriteFontFace5 *fontface) DECLSPEC_HIDDEN;
extern DWRITE_CONTAINER_TYPE opentype_analyze_container_type(void const *, UINT32) DECLSPEC_HIDDEN;
struct dwrite_colorglyph {
USHORT layer; /* [0, num_layers) index indicating current layer */
/* base glyph record data, set once on initialization */
USHORT first_layer;
USHORT num_layers;
/* current layer record data, updated every time glyph is switched to next layer */
UINT16 glyph;
UINT16 palette_index;
};
extern HRESULT opentype_get_colr_glyph(const struct dwrite_fonttable *table, UINT16 glyph,
struct dwrite_colorglyph *color_glyph) DECLSPEC_HIDDEN;
extern void opentype_colr_next_glyph(const struct dwrite_fonttable *table,
struct dwrite_colorglyph *color_glyph) DECLSPEC_HIDDEN;
enum gasp_flags {
GASP_GRIDFIT = 0x0001,
GASP_DOGRAY = 0x0002,
GASP_SYMMETRIC_GRIDFIT = 0x0004,
GASP_SYMMETRIC_SMOOTHING = 0x0008,
};
extern unsigned int opentype_get_gasp_flags(const struct dwrite_fonttable *gasp, float emsize) DECLSPEC_HIDDEN;
/* BiDi helpers */
extern HRESULT bidi_computelevels(const WCHAR*,UINT32,UINT8,UINT8*,UINT8*) DECLSPEC_HIDDEN;
/* FreeType integration */
struct dwrite_glyphbitmap
{
IDWriteFontFace4 *fontface;
DWORD simulations;
float emsize;
BOOL nohint;
BOOL aliased;
UINT16 glyph;
INT pitch;
RECT bbox;
BYTE *buf;
DWRITE_MATRIX *m;
};
extern BOOL init_freetype(void) DECLSPEC_HIDDEN;
extern void release_freetype(void) DECLSPEC_HIDDEN;
extern HRESULT freetype_get_design_glyph_metrics(struct dwrite_fontface *fontface, UINT16 glyph,
DWRITE_GLYPH_METRICS *metrics) DECLSPEC_HIDDEN;
extern void freetype_notify_cacheremove(IDWriteFontFace5 *fontface) DECLSPEC_HIDDEN;
extern HRESULT freetype_get_glyphrun_outline(IDWriteFontFace5 *fontface, float emsize, UINT16 const *glyphs,
float const *advances, DWRITE_GLYPH_OFFSET const *offsets, unsigned int count, BOOL is_rtl,
IDWriteGeometrySink *sink) DECLSPEC_HIDDEN;
extern UINT16 freetype_get_glyphcount(IDWriteFontFace5 *fontface) DECLSPEC_HIDDEN;
extern BOOL freetype_has_kerning_pairs(IDWriteFontFace5 *fontface) DECLSPEC_HIDDEN;
extern INT32 freetype_get_kerning_pair_adjustment(IDWriteFontFace5 *fontface, UINT16 left, UINT16 right) DECLSPEC_HIDDEN;
extern void freetype_get_glyph_bbox(struct dwrite_glyphbitmap *bitmap_desc) DECLSPEC_HIDDEN;
extern BOOL freetype_get_glyph_bitmap(struct dwrite_glyphbitmap*) DECLSPEC_HIDDEN;
extern INT32 freetype_get_glyph_advance(IDWriteFontFace5 *fontface, FLOAT emsize, UINT16 index,
DWRITE_MEASURING_MODE measuring_mode, BOOL *has_contours) DECLSPEC_HIDDEN;
extern void freetype_get_design_glyph_bbox(IDWriteFontFace4*,UINT16,UINT16,RECT*) DECLSPEC_HIDDEN;
/* Glyph shaping */
enum SCRIPT_JUSTIFY
{
SCRIPT_JUSTIFY_NONE,
SCRIPT_JUSTIFY_ARABIC_BLANK,
SCRIPT_JUSTIFY_CHARACTER,
SCRIPT_JUSTIFY_RESERVED1,
SCRIPT_JUSTIFY_BLANK,
SCRIPT_JUSTIFY_RESERVED2,
SCRIPT_JUSTIFY_RESERVED3,
SCRIPT_JUSTIFY_ARABIC_NORMAL,
SCRIPT_JUSTIFY_ARABIC_KASHIDA,
SCRIPT_JUSTIFY_ARABIC_ALEF,
SCRIPT_JUSTIFY_ARABIC_HA,
SCRIPT_JUSTIFY_ARABIC_RA,
SCRIPT_JUSTIFY_ARABIC_BA,
SCRIPT_JUSTIFY_ARABIC_BARA,
SCRIPT_JUSTIFY_ARABIC_SEEN,
SCRIPT_JUSTIFY_ARABIC_SEEN_M
};
struct scriptshaping_cache
{
const struct shaping_font_ops *font;
void *context;
UINT16 upem;
struct ot_gsubgpos_table gsub;
struct ot_gsubgpos_table gpos;
struct
{
struct dwrite_fonttable table;
unsigned int classdef;
unsigned int markattachclassdef;
unsigned int markglyphsetdef;
} gdef;
};
struct shaping_glyph_info
{
/* Combined features mask. */
unsigned int mask;
/* Derived from glyph class, supplied by GDEF. */
unsigned int props;
/* Only relevant for isClusterStart glyphs. Indicates text position for this cluster. */
unsigned int start_text_idx;
};
struct shaping_glyph_properties
{
UINT16 justification : 4;
UINT16 isClusterStart : 1;
UINT16 isDiacritic : 1;
UINT16 isZeroWidthSpace : 1;
UINT16 reserved : 1;
UINT16 components : 4;
UINT16 lig_component : 4;
};
struct scriptshaping_context;
typedef void (*p_apply_context_lookup)(struct scriptshaping_context *context, unsigned int lookup_index);
struct scriptshaping_context
{
struct scriptshaping_cache *cache;
UINT32 language_tag;
const WCHAR *text;
unsigned int length;
BOOL is_rtl;
BOOL is_sideways;
union
{
struct
{
const UINT16 *glyphs;
const DWRITE_SHAPING_GLYPH_PROPERTIES *glyph_props;
DWRITE_SHAPING_TEXT_PROPERTIES *text_props;
const UINT16 *clustermap;
p_apply_context_lookup apply_context_lookup;
} pos;
struct
{
UINT16 *glyphs;
DWRITE_SHAPING_GLYPH_PROPERTIES *glyph_props;
DWRITE_SHAPING_TEXT_PROPERTIES *text_props;
UINT16 *clustermap;
p_apply_context_lookup apply_context_lookup;
unsigned int max_glyph_count;
unsigned int capacity;
const WCHAR *digits;
} subst;
struct
{
UINT16 *glyphs;
struct shaping_glyph_properties *glyph_props;
DWRITE_SHAPING_TEXT_PROPERTIES *text_props;
UINT16 *clustermap;
p_apply_context_lookup apply_context_lookup;
} buffer;
} u;
const struct ot_gsubgpos_table *table; /* Either GSUB or GPOS. */
struct
{
const DWRITE_TYPOGRAPHIC_FEATURES **features;
const unsigned int *range_lengths;
unsigned int range_count;
} user_features;
unsigned int global_mask;
unsigned int lookup_mask; /* Currently processed feature mask, set in main loop. */
struct shaping_glyph_info *glyph_infos;
unsigned int cur;
unsigned int glyph_count;
unsigned int nesting_level_left;
float emsize;
DWRITE_MEASURING_MODE measuring_mode;
float *advances;
DWRITE_GLYPH_OFFSET *offsets;
};
struct shaping_font_ops
{
void (*grab_font_table)(void *context, UINT32 table, const BYTE **data, UINT32 *size, void **data_context);
void (*release_font_table)(void *context, void *data_context);
UINT16 (*get_font_upem)(void *context);
BOOL (*has_glyph)(void *context, unsigned int codepoint);
UINT16 (*get_glyph)(void *context, unsigned int codepoint);
};
extern struct scriptshaping_cache *create_scriptshaping_cache(void *context,
const struct shaping_font_ops *font_ops) DECLSPEC_HIDDEN;
extern void release_scriptshaping_cache(struct scriptshaping_cache*) DECLSPEC_HIDDEN;
extern struct scriptshaping_cache *fontface_get_shaping_cache(struct dwrite_fontface *fontface) DECLSPEC_HIDDEN;
enum shaping_feature_flags
{
FEATURE_GLOBAL = 0x1,
FEATURE_GLOBAL_SEARCH = 0x2,
};
struct shaping_feature
{
unsigned int tag;
unsigned int index;
unsigned int flags;
unsigned int max_value;
unsigned int default_value;
unsigned int mask;
unsigned int shift;
unsigned int stage;
};
struct shaping_features
{
struct shaping_feature *features;
size_t count;
size_t capacity;
unsigned int stage;
};
extern void opentype_layout_scriptshaping_cache_init(struct scriptshaping_cache *cache) DECLSPEC_HIDDEN;
extern DWORD opentype_layout_find_script(const struct scriptshaping_cache *cache, DWORD kind, DWORD tag,
unsigned int *script_index) DECLSPEC_HIDDEN;
extern DWORD opentype_layout_find_language(const struct scriptshaping_cache *cache, DWORD kind, DWORD tag,
unsigned int script_index, unsigned int *language_index) DECLSPEC_HIDDEN;
extern void opentype_layout_apply_gsub_features(struct scriptshaping_context *context, unsigned int script_index,
unsigned int language_index, const struct shaping_features *features) DECLSPEC_HIDDEN;
extern void opentype_layout_apply_gpos_features(struct scriptshaping_context *context, unsigned int script_index,
unsigned int language_index, const struct shaping_features *features) DECLSPEC_HIDDEN;
extern BOOL opentype_layout_check_feature(struct scriptshaping_context *context, unsigned int script_index,
unsigned int language_index, struct shaping_feature *feature, unsigned int glyph_count,
const UINT16 *glyphs, UINT8 *feature_applies) DECLSPEC_HIDDEN;
extern HRESULT opentype_get_vertical_glyph_variants(struct dwrite_fontface *fontface, unsigned int glyph_count,
const UINT16 *nominal_glyphs, UINT16 *glyphs) DECLSPEC_HIDDEN;
extern HRESULT shape_get_glyphs(struct scriptshaping_context *context, const unsigned int *scripts) DECLSPEC_HIDDEN;
extern HRESULT shape_get_positions(struct scriptshaping_context *context, const unsigned int *scripts) DECLSPEC_HIDDEN;
extern HRESULT shape_get_typographic_features(struct scriptshaping_context *context, const unsigned int *scripts,
unsigned int max_tagcount, unsigned int *actual_tagcount, unsigned int *tags) DECLSPEC_HIDDEN;
extern HRESULT shape_check_typographic_feature(struct scriptshaping_context *context, const unsigned int *scripts,
unsigned int tag, unsigned int glyph_count, const UINT16 *glyphs, UINT8 *feature_applies) DECLSPEC_HIDDEN;
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