1 /* pdf2jpeg -- converts a PDF file to a JPEG file, using Cocoa
3 * Copyright (c) 2003 by Jamie Zawinski <jwz@jwz.org>
5 * Permission to use, copy, modify, distribute, and sell this software and its
6 * documentation for any purpose is hereby granted without fee, provided that
7 * the above copyright notice appear in all copies and that both that
8 * copyright notice and this permission notice appear in supporting
9 * documentation. No representations are made about the suitability of this
10 * software for any purpose. It is provided "as is" without express or
13 * Inspired by clues provided by Jan Kujawa and Jonathan Hendry.
16 #import <Cocoa/Cocoa.h>
21 main (int argc, char** argv)
23 const char *progname = argv[0];
24 const char *infile = 0, *outfile = 0;
25 double compression = 0.85;
29 for (i = 1; i < argc; i++)
32 if (argv[i][0] == '-' && argv[i][1] == '-')
34 if (!strcmp (argv[i], "-q") ||
35 !strcmp (argv[i], "-qual") ||
36 !strcmp (argv[i], "-quality"))
39 if (1 != sscanf (argv[++i], " %d %c", &q, &c) ||
42 fprintf (stderr, "%s: quality must be 5 - 100 (%d)\n",
46 compression = q / 100.0;
48 else if (!strcmp (argv[i], "-verbose"))
50 else if (!strcmp (argv[i], "-v") ||
51 !strcmp (argv[i], "-vv") ||
52 !strcmp (argv[i], "-vvv"))
53 verbose += strlen(argv[i])-1;
54 else if (argv[i][0] == '-')
56 fprintf (stderr, "%s: unknown option %s\n", progname, argv[i]);
67 "usage: %s [-verbose] [-quality NN] "
68 "infile.pdf outfile.jpg\n",
74 if (!infile || !outfile)
78 // Much of Cocoa needs one of these to be available.
79 NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
81 //Need an NSApp instance to make [NSImage TIFFRepresentation] work
82 NSApp = [NSApplication sharedApplication];
86 fprintf (stderr, "%s: reading %s...\n", progname, infile);
88 // Load the PDF file into an NSData object:
89 NSData *pdf_data = [NSData dataWithContentsOfFile:
90 [NSString stringWithCString:infile]];
92 // Create an NSPDFImageRep from the data:
93 NSPDFImageRep *pdf_rep = [NSPDFImageRep imageRepWithData:pdf_data];
95 // Create an NSImage instance
96 NSImage *image = [[NSImage alloc] initWithSize:[pdf_rep size]];
98 // Draw the PDFImageRep in the NSImage
100 [pdf_rep drawAtPoint:NSMakePoint(0.0,0.0)];
103 // Load the NSImage's contents into an NSBitmapImageRep:
104 NSBitmapImageRep *bit_rep = [NSBitmapImageRep
105 imageRepWithData:[image TIFFRepresentation]];
107 // Write the bitmapImageRep to a JPEG file:
110 fprintf (stderr, "%s: error converting image?\n", argv[0]);
115 fprintf (stderr, "%s: writing %s (%d%% quality)...\n",
116 progname, outfile, (int) (compression * 100));
118 NSDictionary *props = [NSDictionary
119 dictionaryWithObject:
120 [NSNumber numberWithFloat:compression]
121 forKey:NSImageCompressionFactor];
122 NSData *jpeg_data = [bit_rep representationUsingType:NSJPEGFileType
125 [jpeg_data writeToFile:
126 [NSString stringWithCString:outfile]