134 lines
5.6 KiB
C
134 lines
5.6 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_RESOURCE_H
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#define MUPDF_PDF_RESOURCE_H
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#include "mupdf/fitz/font.h"
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#include "mupdf/fitz/image.h"
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#include "mupdf/fitz/shade.h"
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#include "mupdf/fitz/store.h"
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#include "mupdf/pdf/object.h"
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void pdf_store_item(fz_context *ctx, pdf_obj *key, void *val, size_t itemsize);
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void *pdf_find_item(fz_context *ctx, fz_store_drop_fn *drop, pdf_obj *key);
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void pdf_remove_item(fz_context *ctx, fz_store_drop_fn *drop, pdf_obj *key);
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void pdf_empty_store(fz_context *ctx, pdf_document *doc);
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void pdf_purge_locals_from_store(fz_context *ctx, pdf_document *doc);
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/*
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* Structures used for managing resource locations and avoiding multiple
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* occurrences when resources are added to the document. The search for existing
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* resources will be performed when we are first trying to add an item. Object
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* refs are stored in a fz_hash_table structure using a hash of the md5 sum of
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* the data, enabling rapid lookup.
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*/
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enum { PDF_SIMPLE_FONT_RESOURCE=1, PDF_CID_FONT_RESOURCE=2, PDF_CJK_FONT_RESOURCE=3 };
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enum { PDF_SIMPLE_ENCODING_LATIN, PDF_SIMPLE_ENCODING_GREEK, PDF_SIMPLE_ENCODING_CYRILLIC };
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/* The contents of this structure are defined publically just so we can
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* define this on the stack. */
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typedef struct
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{
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unsigned char digest[16];
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int type;
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int encoding;
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int local_xref;
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} pdf_font_resource_key;
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pdf_obj *pdf_find_font_resource(fz_context *ctx, pdf_document *doc, int type, int encoding, fz_font *item, pdf_font_resource_key *key);
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pdf_obj *pdf_insert_font_resource(fz_context *ctx, pdf_document *doc, pdf_font_resource_key *key, pdf_obj *obj);
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void pdf_drop_resource_tables(fz_context *ctx, pdf_document *doc);
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void pdf_purge_local_font_resources(fz_context *ctx, pdf_document *doc);
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typedef struct pdf_function pdf_function;
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void pdf_eval_function(fz_context *ctx, pdf_function *func, const float *in, int inlen, float *out, int outlen);
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pdf_function *pdf_keep_function(fz_context *ctx, pdf_function *func);
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void pdf_drop_function(fz_context *ctx, pdf_function *func);
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size_t pdf_function_size(fz_context *ctx, pdf_function *func);
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pdf_function *pdf_load_function(fz_context *ctx, pdf_obj *ref, int in, int out);
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fz_colorspace *pdf_document_output_intent(fz_context *ctx, pdf_document *doc);
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fz_colorspace *pdf_load_colorspace(fz_context *ctx, pdf_obj *obj);
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int pdf_is_tint_colorspace(fz_context *ctx, fz_colorspace *cs);
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fz_shade *pdf_load_shading(fz_context *ctx, pdf_document *doc, pdf_obj *obj);
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void pdf_sample_shade_function(fz_context *ctx, float shade[256][FZ_MAX_COLORS+1], int n, int funcs, pdf_function **func, float t0, float t1);
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/**
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Function to recolor a single color from a shade.
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*/
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typedef void (pdf_recolor_vertex)(fz_context *ctx, void *opaque, fz_colorspace *dst_cs, float *d, fz_colorspace *src_cs, const float *src);
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/**
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Function to handle recoloring a shade.
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Called with src_cs from the shade. If no recoloring is required, return NULL. Otherwise
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fill in *dst_cs, and return a vertex recolorer.
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*/
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typedef pdf_recolor_vertex *(pdf_shade_recolorer)(fz_context *ctx, void *opaque, fz_colorspace *src_cs, fz_colorspace **dst_cs);
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/**
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Recolor a shade.
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*/
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pdf_obj *pdf_recolor_shade(fz_context *ctx, pdf_obj *shade, pdf_shade_recolorer *reshade, void *opaque);
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fz_image *pdf_load_inline_image(fz_context *ctx, pdf_document *doc, pdf_obj *rdb, pdf_obj *dict, fz_stream *file);
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int pdf_is_jpx_image(fz_context *ctx, pdf_obj *dict);
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fz_image *pdf_load_image(fz_context *ctx, pdf_document *doc, pdf_obj *obj);
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pdf_obj *pdf_add_image(fz_context *ctx, pdf_document *doc, fz_image *image);
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typedef struct
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{
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fz_storable storable;
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int ismask;
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float xstep;
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float ystep;
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fz_matrix matrix;
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fz_rect bbox;
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pdf_document *document;
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pdf_obj *resources;
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pdf_obj *contents;
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int id; /* unique ID for caching rendered tiles */
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} pdf_pattern;
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pdf_pattern *pdf_load_pattern(fz_context *ctx, pdf_document *doc, pdf_obj *obj);
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pdf_pattern *pdf_keep_pattern(fz_context *ctx, pdf_pattern *pat);
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void pdf_drop_pattern(fz_context *ctx, pdf_pattern *pat);
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pdf_obj *pdf_new_xobject(fz_context *ctx, pdf_document *doc, fz_rect bbox, fz_matrix matrix, pdf_obj *res, fz_buffer *buffer);
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void pdf_update_xobject(fz_context *ctx, pdf_document *doc, pdf_obj *xobj, fz_rect bbox, fz_matrix mat, pdf_obj *res, fz_buffer *buffer);
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pdf_obj *pdf_xobject_resources(fz_context *ctx, pdf_obj *xobj);
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fz_rect pdf_xobject_bbox(fz_context *ctx, pdf_obj *xobj);
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fz_matrix pdf_xobject_matrix(fz_context *ctx, pdf_obj *xobj);
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int pdf_xobject_isolated(fz_context *ctx, pdf_obj *xobj);
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int pdf_xobject_knockout(fz_context *ctx, pdf_obj *xobj);
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int pdf_xobject_transparency(fz_context *ctx, pdf_obj *xobj);
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fz_colorspace *pdf_xobject_colorspace(fz_context *ctx, pdf_obj *xobj);
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#endif
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