273 lines
9.6 KiB
C
273 lines
9.6 KiB
C
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#ifndef MUPDF_FITZ_FONT_H
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#define MUPDF_FITZ_FONT_H
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#include "mupdf/fitz/system.h"
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#include "mupdf/fitz/context.h"
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#include "mupdf/fitz/geometry.h"
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#include "mupdf/fitz/buffer.h"
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/* forward declaration for circular dependency */
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struct fz_device_s;
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/* Various font encoding tables and lookup functions */
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extern const char *fz_glyph_name_from_adobe_standard[256];
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extern const char *fz_glyph_name_from_iso8859_1[256];
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extern const char *fz_glyph_name_from_iso8859_7[256];
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extern const char *fz_glyph_name_from_koi8u[256];
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extern const char *fz_glyph_name_from_mac_expert[256];
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extern const char *fz_glyph_name_from_mac_roman[256];
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extern const char *fz_glyph_name_from_win_ansi[256];
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extern const char *fz_glyph_name_from_windows_1250[256];
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extern const char *fz_glyph_name_from_windows_1251[256];
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extern const char *fz_glyph_name_from_windows_1252[256];
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extern const unsigned short fz_unicode_from_iso8859_1[256];
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extern const unsigned short fz_unicode_from_iso8859_7[256];
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extern const unsigned short fz_unicode_from_koi8u[256];
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extern const unsigned short fz_unicode_from_pdf_doc_encoding[256];
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extern const unsigned short fz_unicode_from_windows_1250[256];
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extern const unsigned short fz_unicode_from_windows_1251[256];
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extern const unsigned short fz_unicode_from_windows_1252[256];
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int fz_iso8859_1_from_unicode(int u);
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int fz_iso8859_7_from_unicode(int u);
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int fz_koi8u_from_unicode(int u);
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int fz_windows_1250_from_unicode(int u);
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int fz_windows_1251_from_unicode(int u);
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int fz_windows_1252_from_unicode(int u);
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int fz_unicode_from_glyph_name(const char *name);
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int fz_unicode_from_glyph_name_strict(const char *name);
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const char **fz_duplicate_glyph_names_from_unicode(int unicode);
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const char *fz_glyph_name_from_unicode_sc(int unicode);
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/*
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An abstract font handle.
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*/
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typedef struct fz_font_s fz_font;
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/*
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* Fonts come in two variants:
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* Regular fonts are handled by FreeType.
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* Type 3 fonts have callbacks to the interpreter.
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*/
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void *fz_font_ft_face(fz_context *ctx, fz_font *font);
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fz_buffer **fz_font_t3_procs(fz_context *ctx, fz_font *font);
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const char *ft_error_string(int err);
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int ft_char_index(void *face, int cid);
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int ft_name_index(void *face, const char *name);
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/* common CJK font collections */
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enum { FZ_ADOBE_CNS, FZ_ADOBE_GB, FZ_ADOBE_JAPAN, FZ_ADOBE_KOREA };
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/*
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Every fz_font carries a set of flags
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within it, in a fz_font_flags_t structure.
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*/
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typedef struct
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{
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unsigned int is_mono : 1;
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unsigned int is_serif : 1;
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unsigned int is_bold : 1;
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unsigned int is_italic : 1;
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unsigned int ft_substitute : 1; /* use substitute metrics */
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unsigned int ft_stretch : 1; /* stretch to match PDF metrics */
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unsigned int fake_bold : 1; /* synthesize bold */
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unsigned int fake_italic : 1; /* synthesize italic */
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unsigned int has_opentype : 1; /* has opentype shaping tables */
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unsigned int invalid_bbox : 1;
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} fz_font_flags_t;
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fz_font_flags_t *fz_font_flags(fz_font *font);
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/*
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In order to shape a given font, we need to
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declare it to a shaper library (harfbuzz, by default, but others
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are possible). To avoid redeclaring it every time we need to
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shape, we hold a shaper handle and the destructor for it within
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the font itself. The handle is initialised by the caller when
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first required and the destructor is called when the fz_font is
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destroyed.
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*/
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typedef struct
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{
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void *shaper_handle;
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void (*destroy)(fz_context *ctx, void *); /* Destructor for shape_handle */
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} fz_shaper_data_t;
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fz_shaper_data_t *fz_font_shaper_data(fz_context *ctx, fz_font *font);
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struct fz_font_s
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{
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int refs;
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char name[32];
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fz_buffer *buffer;
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fz_font_flags_t flags;
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void *ft_face; /* has an FT_Face if used */
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fz_shaper_data_t shaper_data;
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fz_matrix t3matrix;
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void *t3resources;
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fz_buffer **t3procs; /* has 256 entries if used */
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struct fz_display_list_s **t3lists; /* has 256 entries if used */
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float *t3widths; /* has 256 entries if used */
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unsigned short *t3flags; /* has 256 entries if used */
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void *t3doc; /* a pdf_document for the callback */
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void (*t3run)(fz_context *ctx, void *doc, void *resources, fz_buffer *contents, struct fz_device_s *dev, fz_matrix ctm, void *gstate, fz_default_colorspaces *default_cs);
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void (*t3freeres)(fz_context *ctx, void *doc, void *resources);
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fz_rect bbox; /* font bbox is used only for t3 fonts */
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int glyph_count;
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/* per glyph bounding box cache */
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fz_rect *bbox_table;
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/* substitute metrics */
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int width_count;
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short width_default; /* in 1000 units */
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short *width_table; /* in 1000 units */
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/* cached glyph metrics */
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float *advance_cache;
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/* cached encoding lookup */
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uint16_t *encoding_cache[256];
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/* cached md5sum for caching */
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int has_digest;
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unsigned char digest[16];
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};
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const char *fz_font_name(fz_context *ctx, fz_font *font);
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int fz_font_is_bold(fz_context *ctx, fz_font *font);
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int fz_font_is_italic(fz_context *ctx, fz_font *font);
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int fz_font_is_serif(fz_context *ctx, fz_font *font);
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int fz_font_is_monospaced(fz_context *ctx, fz_font *font);
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fz_rect fz_font_bbox(fz_context *ctx, fz_font *font);
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/*
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Type for user supplied system font loading hook.
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name: The name of the font to load.
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bold: 1 if a bold font desired, 0 otherwise.
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italic: 1 if an italic font desired, 0 otherwise.
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needs_exact_metrics: 1 if an exact metric match is required for the font requested.
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Returns a new font handle, or NULL if no font found (or on error).
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*/
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typedef fz_font *(fz_load_system_font_fn)(fz_context *ctx, const char *name, int bold, int italic, int needs_exact_metrics);
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/*
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Type for user supplied cjk font loading hook.
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name: The name of the font to load.
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ordering: The ordering for which to load the font (e.g. FZ_ADOBE_KOREA)
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serif: 1 if a serif font is desired, 0 otherwise.
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Returns a new font handle, or NULL if no font found (or on error).
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*/
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typedef fz_font *(fz_load_system_cjk_font_fn)(fz_context *ctx, const char *name, int ordering, int serif);
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/*
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Type for user supplied fallback font loading hook.
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name: The name of the font to load.
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script: UCDN script enum.
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language: FZ_LANG enum.
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serif, bold, italic: boolean style flags.
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Returns a new font handle, or NULL if no font found (or on error).
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*/
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typedef fz_font *(fz_load_system_fallback_font_fn)(fz_context *ctx, int script, int language, int serif, int bold, int italic);
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void fz_install_load_system_font_funcs(fz_context *ctx,
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fz_load_system_font_fn *f,
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fz_load_system_cjk_font_fn *f_cjk,
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fz_load_system_fallback_font_fn *f_fallback);
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fz_font *fz_load_system_font(fz_context *ctx, const char *name, int bold, int italic, int needs_exact_metrics);
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fz_font *fz_load_system_cjk_font(fz_context *ctx, const char *name, int ordering, int serif);
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const unsigned char *fz_lookup_builtin_font(fz_context *ctx, const char *name, int bold, int italic, int *len);
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const unsigned char *fz_lookup_base14_font(fz_context *ctx, const char *name, int *len);
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const unsigned char *fz_lookup_cjk_font(fz_context *ctx, int ordering, int *len, int *index);
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const unsigned char *fz_lookup_cjk_font_by_language(fz_context *ctx, const char *lang, int *size, int *subfont);
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int fz_lookup_cjk_ordering_by_language(const char *name);
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const unsigned char *fz_lookup_noto_font(fz_context *ctx, int script, int lang, int *len, int *subfont);
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const unsigned char *fz_lookup_noto_math_font(fz_context *ctx, int *len);
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const unsigned char *fz_lookup_noto_music_font(fz_context *ctx, int *len);
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const unsigned char *fz_lookup_noto_symbol1_font(fz_context *ctx, int *len);
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const unsigned char *fz_lookup_noto_symbol2_font(fz_context *ctx, int *len);
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const unsigned char *fz_lookup_noto_emoji_font(fz_context *ctx, int *len);
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fz_font *fz_load_fallback_font(fz_context *ctx, int script, int language, int serif, int bold, int italic);
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fz_font *fz_new_type3_font(fz_context *ctx, const char *name, fz_matrix matrix);
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fz_font *fz_new_font_from_memory(fz_context *ctx, const char *name, const unsigned char *data, int len, int index, int use_glyph_bbox);
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fz_font *fz_new_font_from_buffer(fz_context *ctx, const char *name, fz_buffer *buffer, int index, int use_glyph_bbox);
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fz_font *fz_new_font_from_file(fz_context *ctx, const char *name, const char *path, int index, int use_glyph_bbox);
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fz_font *fz_new_base14_font(fz_context *ctx, const char *name);
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fz_font *fz_new_cjk_font(fz_context *ctx, int ordering);
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fz_font *fz_new_builtin_font(fz_context *ctx, const char *name, int is_bold, int is_italic);
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fz_font *fz_keep_font(fz_context *ctx, fz_font *font);
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void fz_drop_font(fz_context *ctx, fz_font *font);
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void fz_set_font_bbox(fz_context *ctx, fz_font *font, float xmin, float ymin, float xmax, float ymax);
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fz_rect fz_bound_glyph(fz_context *ctx, fz_font *font, int gid, fz_matrix trm);
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int fz_glyph_cacheable(fz_context *ctx, fz_font *font, int gid);
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void fz_run_t3_glyph(fz_context *ctx, fz_font *font, int gid, fz_matrix trm, struct fz_device_s *dev);
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void fz_decouple_type3_font(fz_context *ctx, fz_font *font, void *t3doc);
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float fz_advance_glyph(fz_context *ctx, fz_font *font, int glyph, int wmode);
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int fz_encode_character(fz_context *ctx, fz_font *font, int unicode);
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int fz_encode_character_sc(fz_context *ctx, fz_font *font, int unicode);
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int fz_encode_character_by_glyph_name(fz_context *ctx, fz_font *font, const char *glyphname);
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int fz_encode_character_with_fallback(fz_context *ctx, fz_font *font, int unicode, int script, int language, fz_font **out_font);
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void fz_get_glyph_name(fz_context *ctx, fz_font *font, int glyph, char *buf, int size);
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float fz_font_ascender(fz_context *ctx, fz_font *font);
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float fz_font_descender(fz_context *ctx, fz_font *font);
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void fz_font_digest(fz_context *ctx, fz_font *font, unsigned char digest[16]);
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/*
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Internal functions for our Harfbuzz integration
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to work around the lack of thread safety.
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*/
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void fz_hb_lock(fz_context *ctx);
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void fz_hb_unlock(fz_context *ctx);
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#endif
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