161 lines
5.0 KiB
C
161 lines
5.0 KiB
C
// Copyright (C) 2004-2021 Artifex Software, Inc.
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//
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// This file is part of MuPDF.
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//
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// MuPDF is free software: you can redistribute it and/or modify it under the
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// terms of the GNU Affero General Public License as published by the Free
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// Software Foundation, either version 3 of the License, or (at your option)
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// any later version.
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//
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// MuPDF is distributed in the hope that it will be useful, but WITHOUT ANY
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// WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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// FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License for more
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// details.
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//
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// You should have received a copy of the GNU Affero General Public License
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// along with MuPDF. If not, see <https://www.gnu.org/licenses/agpl-3.0.en.html>
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//
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// Alternative licensing terms are available from the licensor.
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// For commercial licensing, see <https://www.artifex.com/> or contact
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// Artifex Software, Inc., 39 Mesa Street, Suite 108A, San Francisco,
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// CA 94129, USA, for further information.
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#ifndef MUPDF_PDF_FONT_H
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#define MUPDF_PDF_FONT_H
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#include "mupdf/pdf/cmap.h"
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#include "mupdf/fitz/device.h"
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#include "mupdf/fitz/font.h"
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enum
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{
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PDF_FD_FIXED_PITCH = 1 << 0,
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PDF_FD_SERIF = 1 << 1,
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PDF_FD_SYMBOLIC = 1 << 2,
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PDF_FD_SCRIPT = 1 << 3,
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PDF_FD_NONSYMBOLIC = 1 << 5,
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PDF_FD_ITALIC = 1 << 6,
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PDF_FD_ALL_CAP = 1 << 16,
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PDF_FD_SMALL_CAP = 1 << 17,
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PDF_FD_FORCE_BOLD = 1 << 18
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};
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void pdf_load_encoding(const char **estrings, const char *encoding);
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typedef struct
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{
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unsigned short lo;
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unsigned short hi;
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int w; /* type3 fonts can be big! */
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} pdf_hmtx;
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typedef struct
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{
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unsigned short lo;
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unsigned short hi;
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short x;
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short y;
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short w;
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} pdf_vmtx;
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typedef struct
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{
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fz_storable storable;
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size_t size;
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fz_font *font;
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/* FontDescriptor */
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int flags;
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float italic_angle;
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float ascent;
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float descent;
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float cap_height;
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float x_height;
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float missing_width;
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/* Encoding (CMap) */
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pdf_cmap *encoding;
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pdf_cmap *to_ttf_cmap;
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size_t cid_to_gid_len;
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unsigned short *cid_to_gid;
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/* ToUnicode */
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pdf_cmap *to_unicode;
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size_t cid_to_ucs_len;
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unsigned short *cid_to_ucs;
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/* Metrics (given in the PDF file) */
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int wmode;
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int hmtx_len, hmtx_cap;
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pdf_hmtx dhmtx;
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pdf_hmtx *hmtx;
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int vmtx_len, vmtx_cap;
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pdf_vmtx dvmtx;
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pdf_vmtx *vmtx;
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int is_embedded;
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int t3loading;
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} pdf_font_desc;
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void pdf_set_font_wmode(fz_context *ctx, pdf_font_desc *font, int wmode);
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void pdf_set_default_hmtx(fz_context *ctx, pdf_font_desc *font, int w);
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void pdf_set_default_vmtx(fz_context *ctx, pdf_font_desc *font, int y, int w);
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void pdf_add_hmtx(fz_context *ctx, pdf_font_desc *font, int lo, int hi, int w);
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void pdf_add_vmtx(fz_context *ctx, pdf_font_desc *font, int lo, int hi, int x, int y, int w);
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void pdf_end_hmtx(fz_context *ctx, pdf_font_desc *font);
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void pdf_end_vmtx(fz_context *ctx, pdf_font_desc *font);
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pdf_hmtx pdf_lookup_hmtx(fz_context *ctx, pdf_font_desc *font, int cid);
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pdf_vmtx pdf_lookup_vmtx(fz_context *ctx, pdf_font_desc *font, int cid);
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void pdf_load_to_unicode(fz_context *ctx, pdf_document *doc, pdf_font_desc *font, const char **strings, char *collection, pdf_obj *cmapstm);
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int pdf_font_cid_to_gid(fz_context *ctx, pdf_font_desc *fontdesc, int cid);
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const char *pdf_clean_font_name(const char *fontname);
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const unsigned char *pdf_lookup_substitute_font(fz_context *ctx, int mono, int serif, int bold, int italic, int *len);
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pdf_font_desc *pdf_load_type3_font(fz_context *ctx, pdf_document *doc, pdf_obj *rdb, pdf_obj *obj);
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void pdf_load_type3_glyphs(fz_context *ctx, pdf_document *doc, pdf_font_desc *fontdesc);
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pdf_font_desc *pdf_load_font(fz_context *ctx, pdf_document *doc, pdf_obj *rdb, pdf_obj *obj);
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pdf_font_desc *pdf_load_hail_mary_font(fz_context *ctx, pdf_document *doc);
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pdf_font_desc *pdf_new_font_desc(fz_context *ctx);
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pdf_font_desc *pdf_keep_font(fz_context *ctx, pdf_font_desc *fontdesc);
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void pdf_drop_font(fz_context *ctx, pdf_font_desc *font);
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void pdf_print_font(fz_context *ctx, fz_output *out, pdf_font_desc *fontdesc);
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void pdf_run_glyph(fz_context *ctx, pdf_document *doc, pdf_obj *resources, fz_buffer *contents, fz_device *dev, fz_matrix ctm, void *gstate, fz_default_colorspaces *default_cs);
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pdf_obj *pdf_add_simple_font(fz_context *ctx, pdf_document *doc, fz_font *font, int encoding);
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/*
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Creates CID font with Identity-H CMap and a ToUnicode CMap that
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is created by using the TTF cmap table "backwards" to go from
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the GID to a Unicode value.
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We can possibly get width information that may have been embedded
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in the PDF /W array (or W2 if vertical text)
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*/
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pdf_obj *pdf_add_cid_font(fz_context *ctx, pdf_document *doc, fz_font *font);
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/*
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Add a non-embedded UTF16-encoded CID-font for the CJK scripts:
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CNS1, GB1, Japan1, or Korea1
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*/
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pdf_obj *pdf_add_cjk_font(fz_context *ctx, pdf_document *doc, fz_font *font, int script, int wmode, int serif);
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/*
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Add a substitute font for any script.
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*/
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pdf_obj *pdf_add_substitute_font(fz_context *ctx, pdf_document *doc, fz_font *font);
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int pdf_font_writing_supported(fz_font *font);
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fz_buffer *fz_extract_ttf_from_ttc(fz_context *ctx, fz_font *font);
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#endif
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