compress.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
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// any later version.
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// MuPDF is distributed in the hope that it will be useful, but WITHOUT ANY
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// FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License for more
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// along with MuPDF. If not, see <https://www.gnu.org/licenses/agpl-3.0.en.html>
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#ifndef MUPDF_FITZ_COMPRESS_H
#define MUPDF_FITZ_COMPRESS_H
 
#include "mupdf/fitz/system.h"
#include "mupdf/fitz/buffer.h"
#include "mupdf/fitz/pixmap.h"
 
typedef enum
{
    FZ_DEFLATE_NONE = 0,
    FZ_DEFLATE_BEST_SPEED = 1,
    FZ_DEFLATE_BEST = 9,
    FZ_DEFLATE_DEFAULT = -1
} fz_deflate_level;

size_t fz_deflate_bound(fz_context *ctx, size_t size);

void fz_deflate(fz_context *ctx, unsigned char *dest, size_t *compressed_length, const unsigned char *source, size_t source_length, fz_deflate_level level);

unsigned char *fz_new_deflated_data(fz_context *ctx, size_t *compressed_length, const unsigned char *source, size_t source_length, fz_deflate_level level);

unsigned char *fz_new_deflated_data_from_buffer(fz_context *ctx, size_t *compressed_length, fz_buffer *buffer, fz_deflate_level level);
 
typedef enum
{
    FZ_BROTLI_NONE = 0,
    FZ_BROTLI_BEST_SPEED = 1,
    FZ_BROTLI_BEST = 11,
    FZ_BROTLI_DEFAULT = 6 /* Guess */
} fz_brotli_level;

size_t fz_brotli_bound(fz_context *ctx, size_t size);

void fz_compress_brotli(fz_context *ctx, unsigned char *dest, size_t *compressed_length, const unsigned char *source, size_t source_length, fz_brotli_level level);

unsigned char *fz_new_brotli_data(fz_context *ctx, size_t *compressed_length, const unsigned char *source, size_t source_length, fz_brotli_level level);

unsigned char *fz_new_brotli_data_from_buffer(fz_context *ctx, size_t *compressed_length, fz_buffer *buffer, fz_brotli_level level);

fz_buffer *fz_compress_ccitt_fax_g3(fz_context *ctx, const unsigned char *data, int columns, int rows, ptrdiff_t stride);

fz_buffer *fz_compress_ccitt_fax_g4(fz_context *ctx, const unsigned char *data, int columns, int rows, ptrdiff_t stride);
 
#endif