#include "stdio.h"
#include "stdlib.h"
#include "string.h"
#include "utils.h"
#include "image.h"
#include "readpic.h"

/*
	SoftImage pic to ppm converter
	Also supports the raw format
*/

int main(int argc,char **argv)
{
	int i,j;
	int raw = FALSE,flip = FALSE,alpha = FALSE;
	unsigned char r,g,b,a;
	Image *img;
	uint32 pixel;

	/* Check the arguments */
	if (argc < 2) {
		fprintf(stderr,"Usage: %s [-a -h -f] picfilename\n",argv[0]);
		fprintf(stderr,"       -r create a raw file instead\n");
		fprintf(stderr,"       -f flip the image about horizontal axis\n");
		fprintf(stderr,"       -a include the alpha channel\n");
		exit(-1);
	}

	/* Parse the command line options */
	for (i=1;i<argc-1;i++) {
		if (strcmp(argv[i],"-r") == 0) 
			raw = TRUE;
      if (strcmp(argv[i],"-f") == 0)
         flip = TRUE;
      if (strcmp(argv[i],"-a") == 0)
         alpha = TRUE;
	}

	/* Read the image */
	if ((img = FF_PIC_load(argv[argc-1])) == NULL)
		exit(-1);

	/* Write the PPM header */
	if (!raw) {
		printf("P6\n");
		printf("%d %d\n",img->width,img->height);
		printf("255\n");
	}

	/* Write the binary data */
	for (j=0;j<img->height;j++) {
		for (i=0;i<img->width;i++) {

			if (flip)
				pixel = img->bitmap[(img->height-j-1)*img->width+i];
			else
				pixel = img->bitmap[j*img->width+i];

			a = (pixel & 0xff000000) >> 24;
			b = (pixel & 0x00ff0000) >> 16;
			g = (pixel & 0x0000ff00) >> 8;
			r = (pixel & 0x000000ff);

			if (alpha) {
				fwrite(&pixel,sizeof(uint32),1,stdout);
			} else {
				fwrite(&r,sizeof(char),1,stdout);
				fwrite(&g,sizeof(char),1,stdout); 
				fwrite(&b,sizeof(char),1,stdout); 
			}
		}
	}

}