//---------------------------------------------------------------------------------------
// Copyright (c) 2001-2012 by PDFTron Systems Inc. All Rights Reserved.
// Consult legal.txt regarding legal and license information.
//---------------------------------------------------------------------------------------

#import <OBJC/PDFNetOBJC.h>
#import <Foundation/Foundation.h>

//---------------------------------------------------------------------------------------
// The following sample illustrates how to reduce PDF file size using the 
// Optimizer class. 
// 
// 'pdftron.PDF.Optimizer' is an optional PDFNet Add-On utility class that can be 
// used to optimize PDF documents by reducing the file size, removing redundant 
// information, and compressing data streams using the latest in image compression 
// technology. PDF Optimizer can compress and shrink PDF file size with the 
// following operations:
// - Remove duplicated fonts, images, ICC profiles, and any other data stream. 
// - Optionally convert high-quality or print-ready PDF files to small, efficient and web-ready PDF. 
// - Optionally down-sample large images to a given resolution. 
// - Optionally compress or recompress PDF images using JBIG2 and JPEG2000 compression formats. 
// - Compress uncompressed streams and remove unused PDF objects. 
//---------------------------------------------------------------------------------------
int main(int argc, char * argv[])
{
	NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
	
	int ret = 0;

	// The first step in every application using PDFNet is to initialize the 
	// library and set the path to common PDF resources. The library is usually 
	// initialized only once, but calling Initialize() multiple times is also fine.
	[PDFNet Initialize: 0];

	//--------------------------------------------------------------------------------
	// Example 1) Simple optimization of a pdf with default settings. 
	//
	@try
	{
		PDFDoc *doc = [[[PDFDoc alloc] initWithFilepath: @"../../TestFiles/newsletter.pdf"] autorelease];
		[doc InitSecurityHandler];

		[Optimizer Optimize: doc settings: [[[OptimizerSettings alloc] init] autorelease]];

		[doc SaveToFile: @"../../TestFiles/Output/newsletter_opt1.pdf" flags: e_linearized];
	}
	@catch (NSException *e)
	{
		NSLog(@"%@", [e reason]);
        ret = 1;
	}

	//--------------------------------------------------------------------------------
	// Example 2) Reduce image quality and use jpeg compression for
	// non monochrome images.
	@try
	{
		PDFDoc *doc = [[[PDFDoc alloc] initWithFilepath: @"../../TestFiles/newsletter.pdf"] autorelease];
		[doc InitSecurityHandler];

		ImageSettings *image_settings = [[[ImageSettings alloc] init] autorelease];

		// low quality jpeg compression
		[image_settings SetCompressionMode: e_jpeg];
		[image_settings SetQuality: 1];

		// Set the output dpi to be standard screen resolution
		[image_settings SetImageDPI: 144 resampling: 96];

		// this option will recompress images not compressed with
		// jpeg compression and use the result if the new image
		// is smaller.
		[image_settings ForceRecompression: YES];

		// this option is not commonly used since it can 
		// potentially lead to larger files.  It should be enabled
		// only if the output compression specified should be applied
		// to every image of a given type regardless of the output image size
		//image_settings.ForceChanges(true);


		OptimizerSettings *opt_settings = [[[OptimizerSettings alloc] init] autorelease];
		[opt_settings SetColorImageSettings: image_settings];
		[opt_settings SetGrayscaleImageSettings: image_settings];

		// use the same settings for both color and grayscale images
		[Optimizer Optimize: doc settings: opt_settings];

		[doc SaveToFile: @"../../TestFiles/Output/newsletter_opt2.pdf" flags: e_linearized];
	}
	@catch (NSException *e)
	{
		NSLog(@"%@", [e reason]);	
        ret = 1;
	}
    

	//--------------------------------------------------------------------------------
	// Example 3) Use monochrome image settings and default settings
	// for color and grayscale images. 
	@try
	{
		PDFDoc *doc = [[[PDFDoc alloc] initWithFilepath: @"../../TestFiles/newsletter.pdf"] autorelease];
		[doc InitSecurityHandler];

		MonoImageSettings *mono_image_settings = [[[MonoImageSettings alloc] init] autorelease];

		[mono_image_settings SetCompressionMode: e_jbig2];
		[mono_image_settings ForceRecompression: true];

		OptimizerSettings *opt_settings = [[[OptimizerSettings alloc] init] autorelease];
		[opt_settings SetMonoImageSettings: mono_image_settings];

		[Optimizer Optimize: doc settings: opt_settings];

		[doc SaveToFile: @"../../TestFiles/Output/newsletter_opt3.pdf" flags: e_linearized];
	}
	@catch (NSException *e)
	{
		NSLog(@"%@", [e reason]);	
        ret = 1;		
	}
	NSLog(@"Done");
	[pool release];
	return ret;
}