1 /*
2 * in_tiff.cpp -- read TIFF (Tag Image File Format) files with tif22pnm
3 * by pts@fazekas.hu at Sun Apr 14 14:50:30 CEST 2002
4 */
5 /* Imp: get docs about the TIFF format, and rewrite this from scratch */
6 /* Imp: use xviff.c */
7
8 #ifdef __GNUC__
9 #ifndef __clang__
10 #pragma implementation
11 #endif
12 #endif
13
14 #include "image.hpp"
15
16 #if USE_IN_TIFF
17
18 #include "error.hpp"
19 #include "gensio.hpp"
20 #include "helpere.hpp"
21 #include <string.h> /* memchr() */
22 #include <stdio.h> /* printf() */
23
in_tiff_reader(Image::Loader::UFD * ufd,SimBuffer::Flat const &)24 static Image::Sampled *in_tiff_reader(Image::Loader::UFD *ufd, SimBuffer::Flat const&) {
25 // Error::sev(Error::EERROR) << "Cannot load TIFF images yet." << (Error*)0;
26 // HelperE helper("tifftopnm %S"); /* Cannot extract alpha channel */
27 // HelperE helper("tif22pnm -rgba %S"); /* tif22pnm <= 0.07 */
28 char const *cmd=
29 #if OS_COTY==COTY_WIN9X || OS_COTY==COTY_WINNT
30 #if 0 /* unsafe if both tifftopnm and png22pnm exist */
31 "tifftopnm <%S >%D\ntif22pnm -rgba %S pnm: %D"; /* slow but safe */
32 #else
33 "tif22pnm -rgba %S pnm:";
34 #endif
35 #else
36 #if OS_COTY==COTY_UNIX
37 #if 1
38 "(tif22pnm -rgba %S pnm: || tifftopnm %S)";
39 #else
40 /* Dat: not using this to suppress `sh: tif22pnm: command not found', because
41 * it would hide precious error messages printed by tif22pnm.
42 */
43 "((tif22pnm -rgba %S pnm: 2>/dev/null)|| tifftopnm %S)";
44 #endif
45 #else
46 "tif22pnm -rgba %S pnm:"; /* Wants to seek in the file. */
47 #endif
48 #endif
49 HelperE helper(cmd);
50 Encoder::writeFrom(*(Filter::PipeE*)&helper, *(Filter::UngetFILED*)ufd);
51 ((Filter::PipeE*)&helper)->vi_write(0,0); /* Signal EOF */
52 return helper.getImg();
53 }
54
in_tiff_checker(char buf[Image::Loader::MAGIC_LEN],char[Image::Loader::MAGIC_LEN],SimBuffer::Flat const &,Image::Loader::UFD *)55 static Image::Loader::reader_t in_tiff_checker(char buf[Image::Loader::MAGIC_LEN], char [Image::Loader::MAGIC_LEN], SimBuffer::Flat const&, Image::Loader::UFD*) {
56 /* MM\x00\x2a: TIFF image data, big-endian
57 * II\x2a\x00: TIFF image data, little-endian
58 * The second word of TIFF files is the TIFF version number, 42, which has
59 * never changed. The TIFF specification recommends testing for it.
60 */
61 return (0==memcmp(buf,"MM\x00\x2a",4) || 0==memcmp(buf,"II\x2a\x00",4)) ? in_tiff_reader : 0;
62 }
63
64 #else
65 #define in_tiff_checker (Image::Loader::checker_t)NULLP
66 #endif /* USE_IN_XPM */
67
68 Image::Loader in_tiff_loader = { "TIFF", in_tiff_checker, 0 };
69