//
//  NSImageFromPPM.m
//  FaceCrop
//
//  Created by Andrew Salamon on 10/10/06.
//  Copyright 2006 Machine Perception Laboratory, University of California San Diego.. All rights reserved.
//

#import "NSImageFromPPM.h"


@implementation NSImage(NSImageFromPPM)
- (id)initWithContentsOfPPMFile:(NSString *)fileName
{
	NSTask *convert = [[NSTask alloc] init];
	
	NSString *ppmtobmp = [[NSBundle mainBundle] pathForAuxiliaryExecutable:@"ppmtobmp"];
	NSPipe *pipe = [NSPipe pipe];
	NSFileHandle *output = [pipe fileHandleForReading];
	
	[convert setLaunchPath:ppmtobmp];
	[convert setArguments:[NSArray arrayWithObject:fileName]];
	[convert setStandardOutput:pipe];
	[convert launch];
//	[convert waitUntilExit];
	
	NSMutableData *ppmData = [NSMutableData data];
	NSData *data = [output availableData];
	
	while( ( data != nil ) && ( [ data length] != 0 ) )
	{
		[ppmData appendData:data];				
		data = [output availableData];
	}
	
	if( [ppmData length] > 0 )
	{
		self = [self initWithData:ppmData];
	}
	else
	{
		[self release];
		self = nil;
	}
	
	[convert release];
	return self;
}

//{
//	/* Example program fragment to read a PAM or PNM image
//	from stdin, add up the values of every sample in it
//	(I don't know why), and write the image unchanged to
//	stdout. */
//	
//#include <pam.h>
//	
//	struct pam inpam;
//	unsigned int row;
//	
////	pnm_init(&argc, argv);
//	
//	FILE *imagePtr = pm_openr( char * name);
//		
//	pnm_readpaminit( imagePtr, &inpam, PAM_STRUCT_SIZE(tuple_type));
//			
//	tuplerow = pnm_allocpamrow(&inpam);
//	
//	for (row = 0; row < inpam.height; row++)
//	{
//		unsigned int column;
//		pnm_readpamrow( &inpam, tuplerow );
//		for (column = 0; column < inpam.width; ++column)
//		{
//			unsigned int plane;
//			for (plane = 0; plane < inpam.depth; ++plane)
//			{
//				grand_total += tuplerow[column][plane];
//			}
//		}
//	}
//	
//	pnm_freepamrow(tuplerow);
//	pm_close( imagePtr );
//}
@end