filter.h

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// Copyright (C) 2004-2025 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_FILTER_H
#define MUPDF_FITZ_FILTER_H
 
#include "mupdf/fitz/system.h"
#include "mupdf/fitz/context.h"
#include "mupdf/fitz/buffer.h"
#include "mupdf/fitz/store.h"
#include "mupdf/fitz/stream.h"
 
typedef struct fz_jbig2_globals fz_jbig2_globals;
 
typedef struct
{
    int64_t offset;
    uint64_t length;
} fz_range;

fz_stream *fz_open_null_filter(fz_context *ctx, fz_stream *chain, uint64_t len, int64_t offset);

fz_stream *fz_open_range_filter(fz_context *ctx, fz_stream *chain, fz_range *ranges, int nranges);

fz_stream *fz_open_endstream_filter(fz_context *ctx, fz_stream *chain, uint64_t len, int64_t offset);

fz_stream *fz_open_concat(fz_context *ctx, int max, int pad);

void fz_concat_push_drop(fz_context *ctx, fz_stream *concat, fz_stream *chain);

fz_stream *fz_open_arc4(fz_context *ctx, fz_stream *chain, unsigned char *key, unsigned keylen);

fz_stream *fz_open_aesd(fz_context *ctx, fz_stream *chain, unsigned char *key, unsigned keylen);

fz_stream *fz_open_a85d(fz_context *ctx, fz_stream *chain);

fz_stream *fz_open_ahxd(fz_context *ctx, fz_stream *chain);

fz_stream *fz_open_rld(fz_context *ctx, fz_stream *chain);

fz_stream *fz_open_dctd(fz_context *ctx, fz_stream *chain, int color_transform, int invert_cmyk, int l2factor, fz_stream *jpegtables);

fz_stream *fz_open_faxd(fz_context *ctx, fz_stream *chain,
    int k, int end_of_line, int encoded_byte_align,
    int columns, int rows, int end_of_block, int black_is_1);

fz_stream *fz_open_flated(fz_context *ctx, fz_stream *chain, int window_bits);

fz_stream *fz_open_libarchived(fz_context *ctx, fz_stream *chain);

fz_stream *fz_open_brotlid(fz_context *ctx, fz_stream *chain);

fz_stream *fz_open_lzwd(fz_context *ctx, fz_stream *chain, int early_change, int min_bits, int reverse_bits, int old_tiff);

fz_stream *fz_open_predict(fz_context *ctx, fz_stream *chain, int predictor, int columns, int colors, int bpc);

fz_stream *fz_open_jbig2d(fz_context *ctx, fz_stream *chain, fz_jbig2_globals *globals, int embedded);

fz_jbig2_globals *fz_load_jbig2_globals(fz_context *ctx, fz_buffer *buf);

fz_jbig2_globals *fz_keep_jbig2_globals(fz_context *ctx, fz_jbig2_globals *globals);

void fz_drop_jbig2_globals(fz_context *ctx, fz_jbig2_globals *globals);

void fz_drop_jbig2_globals_imp(fz_context *ctx, fz_storable *globals);

fz_buffer * fz_jbig2_globals_data(fz_context *ctx, fz_jbig2_globals *globals);
 
/* Extra filters for tiff */

fz_stream *fz_open_sgilog16(fz_context *ctx, fz_stream *chain, int w);

fz_stream *fz_open_sgilog24(fz_context *ctx, fz_stream *chain, int w);

fz_stream *fz_open_sgilog32(fz_context *ctx, fz_stream *chain, int w);

fz_stream *fz_open_thunder(fz_context *ctx, fz_stream *chain, int w);
 
#endif