144 lines
3.7 KiB
C
144 lines
3.7 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_CMAP_H
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#define MUPDF_PDF_CMAP_H
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#include "mupdf/fitz/store.h"
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#include "mupdf/pdf/document.h"
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#define PDF_MRANGE_CAP 32
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typedef struct
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{
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unsigned short low, high, out;
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} pdf_range;
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typedef struct
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{
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unsigned int low, high, out;
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} pdf_xrange;
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typedef struct
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{
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unsigned int low, out;
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} pdf_mrange;
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typedef struct cmap_splay cmap_splay;
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typedef struct pdf_cmap
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{
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fz_storable storable;
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char cmap_name[32];
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char usecmap_name[32];
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struct pdf_cmap *usecmap;
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int wmode;
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int codespace_len;
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struct
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{
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int n;
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unsigned int low;
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unsigned int high;
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} codespace[40];
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int rlen, rcap;
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pdf_range *ranges;
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int xlen, xcap;
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pdf_xrange *xranges;
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int mlen, mcap;
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pdf_mrange *mranges;
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int dlen, dcap;
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int *dict;
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int tlen, tcap, ttop;
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cmap_splay *tree;
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} pdf_cmap;
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pdf_cmap *pdf_new_cmap(fz_context *ctx);
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pdf_cmap *pdf_keep_cmap(fz_context *ctx, pdf_cmap *cmap);
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void pdf_drop_cmap(fz_context *ctx, pdf_cmap *cmap);
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void pdf_drop_cmap_imp(fz_context *ctx, fz_storable *cmap);
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size_t pdf_cmap_size(fz_context *ctx, pdf_cmap *cmap);
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int pdf_cmap_wmode(fz_context *ctx, pdf_cmap *cmap);
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void pdf_set_cmap_wmode(fz_context *ctx, pdf_cmap *cmap, int wmode);
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void pdf_set_usecmap(fz_context *ctx, pdf_cmap *cmap, pdf_cmap *usecmap);
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/*
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Add a codespacerange section.
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These ranges are used by pdf_decode_cmap to decode
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multi-byte encoded strings.
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*/
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void pdf_add_codespace(fz_context *ctx, pdf_cmap *cmap, unsigned int low, unsigned int high, size_t n);
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/*
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Add a range of contiguous one-to-one mappings (ie 1..5 maps to 21..25)
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*/
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void pdf_map_range_to_range(fz_context *ctx, pdf_cmap *cmap, unsigned int srclo, unsigned int srchi, int dstlo);
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/*
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Add a single one-to-many mapping.
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*/
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void pdf_map_one_to_many(fz_context *ctx, pdf_cmap *cmap, unsigned int one, int *many, size_t len);
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void pdf_sort_cmap(fz_context *ctx, pdf_cmap *cmap);
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/*
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Lookup the mapping of a codepoint.
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*/
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int pdf_lookup_cmap(pdf_cmap *cmap, unsigned int cpt);
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int pdf_lookup_cmap_full(pdf_cmap *cmap, unsigned int cpt, int *out);
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/*
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Use the codespace ranges to extract a codepoint from a
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multi-byte encoded string.
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*/
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int pdf_decode_cmap(pdf_cmap *cmap, unsigned char *s, unsigned char *e, unsigned int *cpt);
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/*
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Create an Identity-* CMap (for both 1 and 2-byte encodings)
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*/
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pdf_cmap *pdf_new_identity_cmap(fz_context *ctx, int wmode, int bytes);
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pdf_cmap *pdf_load_cmap(fz_context *ctx, fz_stream *file);
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/*
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Load predefined CMap from system.
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*/
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pdf_cmap *pdf_load_system_cmap(fz_context *ctx, const char *name);
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/*
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Load built-in CMap resource.
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*/
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pdf_cmap *pdf_load_builtin_cmap(fz_context *ctx, const char *name);
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/*
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Load CMap stream in PDF file
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*/
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pdf_cmap *pdf_load_embedded_cmap(fz_context *ctx, pdf_document *doc, pdf_obj *ref);
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#endif
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