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/* pdf2jpeg -- converts a PDF file to a JPEG file, using Cocoa
*
* Copyright (c) 2003, 2008 by Jamie Zawinski <jwz@jwz.org>
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, provided that
* the above copyright notice appear in all copies and that both that
* copyright notice and this permission notice appear in supporting
* documentation. No representations are made about the suitability of this
* software for any purpose. It is provided "as is" without express or
* implied warranty.
*
* Inspired by clues provided by Jan Kujawa and Jonathan Hendry.
*/
#import <Cocoa/Cocoa.h>
#include <stdio.h>
#include <stdlib.h>
int
main (int argc, char** argv)
{
const char *progname = argv[0];
const char *infile = 0, *outfile = 0;
double compression = 0.85;
double scale = 1.0;
int verbose = 0;
int i;
for (i = 1; i < argc; i++)
{
char c;
if (argv[i][0] == '-' && argv[i][1] == '-')
argv[i]++;
if (!strcmp (argv[i], "-q") ||
!strcmp (argv[i], "-qual") ||
!strcmp (argv[i], "-quality"))
{
int q;
if (1 != sscanf (argv[++i], " %d %c", &q, &c) ||
q < 5 || q > 100)
{
fprintf (stderr, "%s: quality must be 5 - 100 (%d)\n",
progname, q);
goto USAGE;
}
compression = q / 100.0;
}
else if (!strcmp (argv[i], "-scale"))
{
float s;
if (1 != sscanf (argv[++i], " %f %c", &s, &c) ||
s <= 0 || s > 50)
{
fprintf (stderr, "%s: scale must be 0.0 - 50.0 (%f)\n",
progname, s);
goto USAGE;
}
scale = s;
}
else if (!strcmp (argv[i], "-verbose"))
verbose++;
else if (!strcmp (argv[i], "-v") ||
!strcmp (argv[i], "-vv") ||
!strcmp (argv[i], "-vvv"))
verbose += strlen(argv[i])-1;
else if (argv[i][0] == '-')
{
fprintf (stderr, "%s: unknown option %s\n", progname, argv[i]);
goto USAGE;
}
else if (!infile)
infile = argv[i];
else if (!outfile)
outfile = argv[i];
else
{
USAGE:
fprintf (stderr,
"usage: %s [-verbose] [-scale N] [-quality NN] "
"infile.pdf outfile.jpg\n",
progname);
exit (1);
}
}
if (!infile || !outfile)
goto USAGE;
// Much of Cocoa needs one of these to be available.
NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
//Need an NSApp instance to make [NSImage TIFFRepresentation] work
NSApp = [NSApplication sharedApplication];
[NSApp autorelease];
if (verbose)
fprintf (stderr, "%s: reading %s...\n", progname, infile);
// Load the PDF file into an NSData object:
NSData *pdf_data = [NSData dataWithContentsOfFile:
[NSString stringWithCString:infile
encoding:NSUTF8StringEncoding]];
// Create an NSPDFImageRep from the data:
NSPDFImageRep *pdf_rep = [NSPDFImageRep imageRepWithData:pdf_data];
// Create an NSImage instance
NSRect rect;
rect.size = [pdf_rep size];
rect.size.width *= scale;
rect.size.height *= scale;
rect.origin.x = rect.origin.y = 0;
NSImage *image = [[NSImage alloc] initWithSize:rect.size];
// Draw the PDFImageRep in the NSImage
[image lockFocus];
[pdf_rep drawInRect:rect];
[image unlockFocus];
// Load the NSImage's contents into an NSBitmapImageRep:
NSBitmapImageRep *bit_rep = [NSBitmapImageRep
imageRepWithData:[image TIFFRepresentation]];
// Write the bitmapImageRep to a JPEG file:
if (bit_rep == nil)
{
fprintf (stderr, "%s: error converting image?\n", argv[0]);
exit (1);
}
if (verbose)
fprintf (stderr, "%s: writing %s (%d%% quality)...\n",
progname, outfile, (int) (compression * 100));
NSDictionary *props = [NSDictionary
dictionaryWithObject:
[NSNumber numberWithFloat:compression]
forKey:NSImageCompressionFactor];
NSData *jpeg_data = [bit_rep representationUsingType:NSJPEGFileType
properties:props];
[jpeg_data writeToFile:
[NSString stringWithCString:outfile
encoding:NSUTF8StringEncoding]
atomically:YES];
[image release];
[pool release];
exit (0);
}
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