band-writer.h

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// Copyright (C) 2004-2021 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_BAND_WRITER_H
#define MUPDF_FITZ_BAND_WRITER_H
 
#include "mupdf/fitz/system.h"
#include "mupdf/fitz/context.h"
#include "mupdf/fitz/output.h"
#include "mupdf/fitz/color.h"
#include "mupdf/fitz/separation.h"

typedef struct fz_band_writer fz_band_writer;

void fz_write_header(fz_context *ctx, fz_band_writer *writer, int w, int h, int n, int alpha, int xres, int yres, int pagenum, fz_colorspace *cs, fz_separations *seps);

void fz_write_band(fz_context *ctx, fz_band_writer *writer, int stride, int band_height, const unsigned char *samples);

void fz_close_band_writer(fz_context *ctx, fz_band_writer *writer);

void fz_drop_band_writer(fz_context *ctx, fz_band_writer *writer);
 
/* Implementation details: subject to change. */
 
typedef void (fz_write_header_fn)(fz_context *ctx, fz_band_writer *writer, fz_colorspace *cs);
typedef void (fz_write_band_fn)(fz_context *ctx, fz_band_writer *writer, int stride, int band_start, int band_height, const unsigned char *samples);
typedef void (fz_write_trailer_fn)(fz_context *ctx, fz_band_writer *writer);
typedef void (fz_close_band_writer_fn)(fz_context *ctx, fz_band_writer *writer);
typedef void (fz_drop_band_writer_fn)(fz_context *ctx, fz_band_writer *writer);
 
struct fz_band_writer
{
    fz_drop_band_writer_fn *drop;
    fz_close_band_writer_fn *close;
    fz_write_header_fn *header;
    fz_write_band_fn *band;
    fz_write_trailer_fn *trailer;
    fz_output *out;
    int w;
    int h;
    int n;
    int s;
    int alpha;
    int xres;
    int yres;
    int pagenum;
    int line;
    fz_separations *seps;
};
 
fz_band_writer *fz_new_band_writer_of_size(fz_context *ctx, size_t size, fz_output *out);
#define fz_new_band_writer(C,M,O) ((M *)Memento_label(fz_new_band_writer_of_size(ctx, sizeof(M), O), #M))
 
 
#endif