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/* -*- c -*- */
/*
* writeimage.c
*
* metapixel
*
* Copyright (C) 2000 Mark Probst
*
* This program 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 2
* of the License, or (at your option) any later version.
*
* This program 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 this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <assert.h>
#include <stdlib.h>
#include "rwpng.h"
#include "writeimage.h"
image_writer_t*
open_image_writing (char *filename, int width, int height, int format)
{
image_writer_t *writer;
void *data = 0;
image_write_func_t write_func = 0;
image_writer_free_func_t free_func = 0;
if (format == IMAGE_FORMAT_PNG)
{
data = open_png_file_writing(filename, width, height);
write_func = png_write_lines;
free_func = png_free_writer_data;
}
else
assert(0);
if (data == 0)
return 0;
writer = (image_writer_t*)malloc(sizeof(image_writer_t));
writer->width = width;
writer->height = height;
writer->num_lines_written = 0;
writer->data = data;
writer->write_func = write_func;
writer->free_func = free_func;
return writer;
}
void
write_lines (image_writer_t *writer, unsigned char *lines, int num_lines)
{
assert(writer->num_lines_written + num_lines <= writer->height);
writer->write_func(writer->data, lines, num_lines);
}
void
free_image_writer (image_writer_t *writer)
{
writer->free_func(writer->data);
free(writer);
}
void
write_image (char *filename, int width, int height, unsigned char *lines, int format)
{
image_writer_t *writer = open_image_writing(filename, width, height, format);
assert(writer != 0);
write_lines(writer, lines, height);
free_image_writer(writer);
}
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