imageio_png.h

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/*
    This file is part of darktable,
    Copyright (C) 2009-2011, 2014 johannes hanika.
    Copyright (C) 2012 Richard Wonka.
    Copyright (C) 2012 Ulrich Pegelow.
    Copyright (C) 2014 Roman Lebedev.
    Copyright (C) 2016 Tobias Ellinghaus.
    Copyright (C) 2019 Philippe Weyland.
    Copyright (C) 2020 Pascal Obry.
    Copyright (C) 2022 Martin Bařinka.
    
    darktable is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.
    
    darktable 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 General Public License for more details.
    
    You should have received a copy of the GNU General Public License
    along with darktable.  If not, see <http://www.gnu.org/licenses/>.
*/
 
#ifndef DT_IMAGEIO_IMAGEIO_PNG_H
#define DT_IMAGEIO_IMAGEIO_PNG_H
 
#include "common/image.h"
#include "caches/mipmap_cache.h"
 
#include <png.h>
 
typedef struct dt_imageio_png_t
{
  int max_width, max_height;
  int width, height;
  int color_type, bit_depth;
  int bpp;
  FILE *f;
  png_structp png_ptr;
  png_infop info_ptr;
} dt_imageio_png_t;
 
int read_header(const char *filename, dt_imageio_png_t *png);
int read_image(dt_imageio_png_t *png, void *out);
 
dt_imageio_retval_t dt_imageio_open_png(dt_image_t *img, const char *filename, dt_mipmap_buffer_t *buf);
int dt_imageio_png_read_profile(const char *filename, uint8_t **out);
 
#endif // DT_IMAGEIO_IMAGEIO_PNG_H
 
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