aztec_encode.h

/*
 * Copyright (C) 2019 by Slava Monich <slava@monich.com>
 *
 * You may use this file under the terms of the BSD license as follows:
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *   1. Redistributions of source code must retain the above copyright
 *      notice, this list of conditions and the following disclaimer.
 *   2. Redistributions in binary form must reproduce the above copyright
 *      notice, this list of conditions and the following disclaimer
 *      in the documentation and/or other materials provided with the
 *      distribution.
 *   3. Neither the names of the copyright holders nor the names of its
 *      contributors may be used to endorse or promote products derived
 *      from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * The views and conclusions contained in the software and documentation
 * are those of the authors and should not be interpreted as representing
 * any official policies, either expressed or implied.
 */

#ifndef AZTEC_ENCODE_H
#define AZTEC_ENCODE_H

#include <glib.h>

G_BEGIN_DECLS

typedef const guint8* AztecSymbolRow;

typedef struct aztec_symbol {
    guint size;
    const AztecSymbolRow* rows;
} AztecSymbol;

/*
 * Left-most pixel first (the least significant bit is the left-most pixel).
 */
AztecSymbol*
aztec_encode(
    const void* data,
    gsize len,
    guint correct);

/*
 * Right-most pixel first (the most significant bit is the left-most
 * pixel in the group of 8 pixels, although left-most group of 8 pixels
 * goes first). This is the format used by 1-bit PNGs.
 */
AztecSymbol*
aztec_encode_inv(
    const void* data,
    gsize len,
    guint correct); /* Since 1.0.2 */

void
aztec_symbol_free(
    AztecSymbol* symbol);

#define AZTEC_CORRECTION_LOW (10)
#define AZTEC_CORRECTION_MEDIUM (23)
#define AZTEC_CORRECTION_HIGH (36)
#define AZTEC_CORRECTION_HIGHEST (50)
#define AZTEC_CORRECTION_DEFAULT AZTEC_CORRECTION_MEDIUM

G_END_DECLS

#endif /* AZTEC_ENCODE_H */

/*
 * Local Variables:
 * mode: C
 * c-basic-offset: 4
 * indent-tabs-mode: nil
 * End:
 */