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landaiqing
2026-02-10 14:45:18 +08:00
parent a530a79566
commit 5ce88674da
142 changed files with 12394 additions and 4280 deletions
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120
include/mupdf/fitz/text.h
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@@ -1,3 +1,25 @@
// Copyright (C) 2004-2021 Artifex Software, Inc.
//
// This file is part of MuPDF.
//
// MuPDF is free software: you can redistribute it and/or modify it under the
// terms of the GNU Affero General Public License as published by the Free
// Software Foundation, either version 3 of the License, or (at your option)
// any later version.
//
// MuPDF 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 Affero General Public License for more
// details.
//
// You should have received a copy of the GNU Affero General Public License
// along with MuPDF. If not, see <https://www.gnu.org/licenses/agpl-3.0.en.html>
//
// Alternative licensing terms are available from the licensor.
// For commercial licensing, see <https://www.artifex.com/> or contact
// Artifex Software, Inc., 39 Mesa Street, Suite 108A, San Francisco,
// CA 94129, USA, for further information.
#ifndef MUPDF_FITZ_TEXT_H
#define MUPDF_FITZ_TEXT_H
@@ -7,7 +29,7 @@
#include "mupdf/fitz/path.h"
#include "mupdf/fitz/bidi.h"
/*
/**
Text buffer.
The trm field contains the a, b, c and d coefficients.
@@ -19,21 +41,18 @@
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
typedef struct
{
float x, y;
int gid; /* -1 for one gid to many ucs mappings */
int ucs; /* -1 for one ucs to many gid mappings */
};
int cid; /* CID for CJK fonts, raw character code for other fonts; or unicode for non-PDF formats. */
} fz_text_item;
#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
typedef enum
{
FZ_LANG_UNSET = 0,
FZ_LANG_ur = FZ_LANG_TAG2('u','r'),
@@ -45,7 +64,7 @@ typedef enum fz_text_language_e
FZ_LANG_zh_Hant = FZ_LANG_TAG3('z','h','t'),
} fz_text_language;
struct fz_text_span_s
typedef struct fz_text_span
{
fz_font *font;
fz_matrix trm;
@@ -55,41 +74,40 @@ struct fz_text_span_s
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_span *next;
} fz_text_span;
struct fz_text_s
typedef struct
{
int refs;
fz_text_span *head, *tail;
};
} fz_text;
/*
fz_new_text: Create a new empty fz_text object.
/**
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.
/**
Increment the reference count for the text object. The same
pointer is returned.
text: text object to keep a reference to.
Return the same text pointer.
Never throws exceptions.
*/
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.
/**
Decrement the reference count for the text object. When the
reference count hits zero, the text object is freed.
text: Object to drop the reference to.
Never throws exceptions.
*/
void fz_drop_text(fz_context *ctx, const fz_text *text);
/*
fz_show_glyph: Add a glyph/unicode value to a text object.
/**
Add a glyph/unicode value to a text object.
text: Text object to add to.
@@ -101,6 +119,8 @@ void fz_drop_text(fz_context *ctx, const fz_text *text);
unicode: The unicode character for the glyph.
cid: The CJK CID value or raw character code.
wmode: 1 for vertical mode, 0 for horizontal.
bidi_level: The bidirectional level for this glyph.
@@ -113,17 +133,17 @@ void fz_drop_text(fz_context *ctx, const fz_text *text);
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);
void fz_show_glyph(fz_context *ctx, fz_text *text, fz_font *font, fz_matrix trm, int glyph, int unicode, int wmode, int bidi_level, fz_bidi_direction markup_dir, fz_text_language language);
void fz_show_glyph_aux(fz_context *ctx, fz_text *text, fz_font *font, fz_matrix trm, int glyph, int unicode, int cid, int wmode, int bidi_level, fz_bidi_direction markup_dir, fz_text_language lang);
/*
fz_show_string: Add a UTF8 string to a text object.
/**
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.
trm: The transform to use.
s: The utf-8 string to add.
@@ -131,18 +151,27 @@ void fz_show_glyph(fz_context *ctx, fz_text *text, fz_font *font, const fz_matri
bidi_level: The bidirectional level for this glyph.
markup_dir: The direction of the text as specified in the
markup.
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).
(e.g. FZ_LANG_zh_Hans).
Throws exception on failure to allocate.
Returns the transform updated with the advance width of the
string.
*/
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_matrix 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.
/**
Measure the advance width of a UTF8 string should it be added to a text object.
This uses the same layout algorithms as fz_show_string, and can be used
to calculate text alignment adjustments.
*/
fz_matrix
fz_measure_string(fz_context *ctx, fz_font *user_font, fz_matrix trm, const char *s, int wmode, int bidi_level, fz_bidi_direction markup_dir, fz_text_language language);
/**
Find the bounds of a given text object.
text: The text object to find the bounds of.
@@ -156,18 +185,9 @@ void fz_show_string(fz_context *ctx, fz_text *text, fz_font *font, fz_matrix *tr
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);
fz_rect fz_bound_text(fz_context *ctx, const fz_text *text, const fz_stroke_state *stroke, fz_matrix ctm);
/*
fz_clone_text: Clone a text object.
text: The text object to clone.
Throws an exception on allocation failure.
*/
fz_text *fz_clone_text(fz_context *ctx, const fz_text *text);
/*
/**
Convert ISO 639 (639-{1,2,3,5}) language specification
strings losslessly to a 15 bit fz_text_language code.
@@ -178,7 +198,7 @@ fz_text *fz_clone_text(fz_context *ctx, const fz_text *text);
*/
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.