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#ifndef MUPDF_FITZ_TEXT_H
#define MUPDF_FITZ_TEXT_H
#include "mupdf/fitz/system.h"
#include "mupdf/fitz/context.h"
#include "mupdf/fitz/font.h"
#include "mupdf/fitz/path.h"
#include "mupdf/fitz/bidi.h"
/*
Text buffer.
The trm field contains the a, b, c and d coefficients.
The e and f coefficients come from the individual elements,
together they form the transform matrix for the glyph.
Glyphs are referenced by glyph ID.
The Unicode text equivalent is kept in a separate array
with indexes into the glyph array.
*/
typedef struct fz_text_s fz_text;
typedef struct fz_text_span_s fz_text_span;
typedef struct fz_text_item_s fz_text_item;
struct fz_text_item_s
{
float x, y;
int gid; /* -1 for one gid to many ucs mappings */
int ucs; /* -1 for one ucs to many gid mappings */
};
#define FZ_LANG_TAG2(c1,c2) ((c1-'a'+1) + ((c2-'a'+1)*27))
#define FZ_LANG_TAG3(c1,c2,c3) ((c1-'a'+1) + ((c2-'a'+1)*27) + ((c3-'a'+1)*27*27))
typedef enum fz_text_language_e
{
FZ_LANG_UNSET = 0,
FZ_LANG_ur = FZ_LANG_TAG2('u','r'),
FZ_LANG_urd = FZ_LANG_TAG3('u','r','d'),
FZ_LANG_ko = FZ_LANG_TAG2('k','o'),
FZ_LANG_ja = FZ_LANG_TAG2('j','a'),
FZ_LANG_zh = FZ_LANG_TAG2('z','h'),
FZ_LANG_zh_Hans = FZ_LANG_TAG3('z','h','s'),
FZ_LANG_zh_Hant = FZ_LANG_TAG3('z','h','t'),
} fz_text_language;
struct fz_text_span_s
{
fz_font *font;
fz_matrix trm;
unsigned wmode : 1; /* 0 horizontal, 1 vertical */
unsigned bidi_level : 7; /* The bidirectional level of text */
unsigned markup_dir : 2; /* The direction of text as marked in the original document */
unsigned language : 15; /* The language as marked in the original document */
int len, cap;
fz_text_item *items;
fz_text_span *next;
};
struct fz_text_s
{
int refs;
fz_text_span *head, *tail;
};
/*
fz_new_text: Create a new empty fz_text object.
Throws exception on failure to allocate.
*/
fz_text *fz_new_text(fz_context *ctx);
/*
fz_keep_text: Add a reference to a fz_text.
text: text object to keep a reference to.
Return the same text pointer.
*/
fz_text *fz_keep_text(fz_context *ctx, const fz_text *text);
/*
fz_drop_text: Drop a reference to the object, freeing
if it is the last one.
text: Object to drop the reference to.
*/
void fz_drop_text(fz_context *ctx, const fz_text *text);
/*
fz_show_glyph: Add a glyph/unicode value to a text object.
text: Text object to add to.
font: The font the glyph should be added in.
trm: The transform to use for the glyph.
glyph: The glyph id to add.
unicode: The unicode character for the glyph.
wmode: 1 for vertical mode, 0 for horizontal.
bidi_level: The bidirectional level for this glyph.
markup_dir: The direction of the text as specified in the
markup.
language: The language in use (if known, 0 otherwise)
(e.g. FZ_LANG_zh_Hans).
Throws exception on failure to allocate.
*/
void fz_show_glyph(fz_context *ctx, fz_text *text, fz_font *font, const fz_matrix *trm, int glyph, int unicode, int wmode, int bidi_level, fz_bidi_direction markup_dir, fz_text_language language);
/*
fz_show_string: Add a UTF8 string to a text object.
text: Text object to add to.
font: The font the string should be added in.
trm: The transform to use. Will be updated according
to the advance of the string on exit.
s: The utf-8 string to add.
wmode: 1 for vertical mode, 0 for horizontal.
bidi_level: The bidirectional level for this glyph.
markup_dir: The direction of the text as specified in the
markup.
language: The language in use (if known, 0 otherwise)
(e.g. FZ_LANG_zh_Hans).
Throws exception on failure to allocate.
*/
void fz_show_string(fz_context *ctx, fz_text *text, fz_font *font, fz_matrix *trm, const char *s, int wmode, int bidi_level, fz_bidi_direction markup_dir, fz_text_language language);
/*
fz_bound_text: Find the bounds of a given text object.
text: The text object to find the bounds of.
stroke: Pointer to the stroke attributes (for stroked
text), or NULL (for filled text).
ctm: The matrix in use.
r: pointer to storage for the bounds.
Returns a pointer to r, which is updated to contain the
bounding box for the text object.
*/
fz_rect *fz_bound_text(fz_context *ctx, const fz_text *text, const fz_stroke_state *stroke, const fz_matrix *ctm, fz_rect *r);
/*
Convert ISO 639 (639-{1,2,3,5}) language specification
strings losslessly to a 15 bit fz_text_language code.
No validation is carried out. Obviously invalid (out
of spec) codes will be mapped to FZ_LANG_UNSET, but
well-formed (but undefined) codes will be blithely
accepted.
*/
fz_text_language fz_text_language_from_string(const char *str);
/*
Recover ISO 639 (639-{1,2,3,5}) language specification
strings losslessly from a 15 bit fz_text_language code.
No validation is carried out. See note above.
*/
char *fz_string_from_text_language(char str[8], fz_text_language lang);
#endif
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