#include <stdio.h>

#include <png.h>

#include <stdlib.h>

#include <string.h>

#include "png_util.h"

void usage( const char* prgName ) {

printf("Usage %s <PNG file>\n", prgName);

}

int main ( int argc, char** argv) {

FILE* fp;

size_t width = 0;

size_t height = 0;

size_t depth = 0;

size_t channels = 0;

size_t r; /* counter for rows */

PNGImage* image;

if ( argc < 2 ) {

usage( argv[0] );

exit(1);

}

image = readPNGfile(argv[1]);

if ( image == NULL ) {

exit(1);

}

/* Retrive basic image information */

width = png_get_image_width( image->png, image->info );

height = png_get_image_height( image->png, image->info );

depth = png_get_bit_depth( image->png, image->info );

channels = png_get_channels( image->png, image->info );

printf("Image Info:\nWidth :%d\nHeight :%d\nBit depth:%d\n", width, height, depth );

printf("Channels :%u\n", channels);

printf("Creating info file\n"); /*-------------------------------------------*/

fp = fopen("info","wb");

if (!fp) {

printf("Could not create info file\n");

png_destroy_read_struct( &image->png, &image->info, &image->end);

exit(1);

}

fwrite(image->info, sizeof(png_info), 1,fp );

fclose(fp);

printf("Creating end file\n"); /*-------------------------------------------*/

fp = fopen("end","wb");

if (!fp) {

printf("Could not create end file\n");

png_destroy_read_struct( &image->png, &image->info, &image->end);

exit(1);

}

fwrite(image->end, sizeof(png_info), 1,fp );

fclose(fp);

printf("Creating raw file\n"); /*-------------------------------------------*/

fp = fopen("raw","wb");

if (!fp) {

printf("Could not create raw file\n");

png_destroy_read_struct( &image->png, &image->info, &image->end);

exit(1);

}

for ( r=0; r < height; r = r+1 )

fwrite(image->row_pointers[r], sizeof(png_byte), width, fp );

fclose(fp);

printf("Releasing memory\n");

png_destroy_read_struct( &image->png, &image->info, &image->end);

return 0;

}