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50a14534 EB |
1 | /* |
2 | * viking -- GPS Data and Topo Analyzer, Explorer, and Manager | |
3 | * | |
4 | * Copyright (C) 2003-2005, Evan Battaglia <gtoevan@gmx.net> | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; if not, write to the Free Software | |
18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
19 | * | |
20 | */ | |
21 | ||
22 | /* | |
23 | * Large (and important) sections of this file were adapted from | |
24 | * ROX-Filer source code, Copyright (C) 2003, the ROX-Filer team, | |
25 | * originally licensed under the GPL v2 or greater (as above). | |
26 | * | |
27 | */ | |
28 | ||
45acf79e MA |
29 | #ifdef HAVE_CONFIG_H |
30 | #include "config.h" | |
31 | #endif | |
32 | ||
50a14534 | 33 | #include <stdlib.h> |
45acf79e MA |
34 | #ifdef HAVE_UNISTD_H |
35 | #include <unistd.h> | |
36 | #endif | |
50a14534 EB |
37 | #include <errno.h> |
38 | #include <string.h> | |
f83131b9 MA |
39 | #include <glib.h> |
40 | #include <glib/gstdio.h> | |
50a14534 EB |
41 | #include "viking.h" |
42 | #include "thumbnails.h" | |
5bfafde9 | 43 | #include "icons/icons.h" |
bd27baa4 | 44 | #include "md5_hash.h" |
50a14534 EB |
45 | |
46 | #ifdef __CYGWIN__ | |
47 | #ifdef __CYGWIN_USE_BIG_TYPES__ | |
48 | #define ST_SIZE_FMT "%lld" | |
49 | #else | |
50 | #define ST_SIZE_FMT "%ld" | |
51 | #endif | |
52 | #else | |
53 | /* FIXME -- on some systems this may need to me "lld", see ROX-Filer code */ | |
54 | #define ST_SIZE_FMT "%ld" | |
55 | #endif | |
56 | ||
57 | #undef MIN /* quit yer whining, gcc */ | |
58 | #undef MAX | |
90e25247 GB |
59 | #ifndef MAX |
60 | /* We need MAX macro and some system does not offer it */ | |
61 | #define MAX(a,b) (((a)>(b))?(a):(b)) | |
62 | #endif | |
50a14534 | 63 | |
118b901b MA |
64 | #define HOME_DIR g_get_home_dir() |
65 | ||
50a14534 | 66 | #ifdef WINDOWS |
50a14534 EB |
67 | #define THUMB_DIR "\\THUMBNAILS\\" /* viking maps default viking\maps */ |
68 | #define THUMB_SUB_DIR "normal\\" | |
50a14534 | 69 | #else |
50a14534 EB |
70 | #define THUMB_DIR "/.thumbnails/" |
71 | #define THUMB_SUB_DIR "normal/" | |
72 | #endif | |
73 | ||
74 | #define PIXMAP_THUMB_SIZE 128 | |
75 | ||
50a14534 EB |
76 | static GdkPixbuf *save_thumbnail(const char *pathname, GdkPixbuf *full); |
77 | static GdkPixbuf *child_create_thumbnail(const gchar *path); | |
78 | ||
79 | gboolean a_thumbnails_exists ( const gchar *filename ) | |
80 | { | |
81 | GdkPixbuf *pixbuf = a_thumbnails_get(filename); | |
82 | if ( pixbuf ) | |
83 | { | |
84 | g_object_unref ( G_OBJECT ( pixbuf ) ); | |
85 | return TRUE; | |
86 | } | |
87 | return FALSE; | |
88 | } | |
89 | ||
90 | GdkPixbuf *a_thumbnails_get_default () | |
91 | { | |
5bfafde9 | 92 | return gdk_pixbuf_from_pixdata ( &thumbnails_pixbuf, FALSE, NULL ); |
50a14534 EB |
93 | } |
94 | ||
95 | /* filename must be absolute. you could have a function to make sure it exists and absolutize it */ | |
96 | ||
97 | void a_thumbnails_create(const gchar *filename) | |
98 | { | |
99 | GdkPixbuf *pixbuf = a_thumbnails_get(filename); | |
100 | ||
101 | if ( ! pixbuf ) | |
102 | pixbuf = child_create_thumbnail(filename); | |
19096e42 | 103 | |
50a14534 EB |
104 | if ( pixbuf ) |
105 | g_object_unref ( G_OBJECT ( pixbuf ) ); | |
106 | } | |
107 | ||
108 | GdkPixbuf *a_thumbnails_scale_pixbuf(GdkPixbuf *src, int max_w, int max_h) | |
109 | { | |
110 | int w, h; | |
111 | ||
112 | w = gdk_pixbuf_get_width(src); | |
113 | h = gdk_pixbuf_get_height(src); | |
114 | ||
115 | if (w <= max_w && h <= max_h) | |
116 | { | |
f2fcc2d2 | 117 | g_object_ref ( G_OBJECT ( src ) ); |
50a14534 EB |
118 | return src; |
119 | } | |
120 | else | |
121 | { | |
122 | float scale_x = ((float) w) / max_w; | |
123 | float scale_y = ((float) h) / max_h; | |
124 | float scale = MAX(scale_x, scale_y); | |
125 | int dest_w = w / scale; | |
126 | int dest_h = h / scale; | |
127 | ||
128 | return gdk_pixbuf_scale_simple(src, | |
129 | MAX(dest_w, 1), | |
130 | MAX(dest_h, 1), | |
131 | GDK_INTERP_BILINEAR); | |
132 | } | |
133 | } | |
134 | ||
135 | static GdkPixbuf *child_create_thumbnail(const gchar *path) | |
136 | { | |
6d0927b1 | 137 | GdkPixbuf *image, *tmpbuf; |
50a14534 EB |
138 | |
139 | image = gdk_pixbuf_new_from_file(path, NULL); | |
778e43b4 | 140 | if (!image) |
19096e42 | 141 | return NULL; |
778e43b4 | 142 | |
6d0927b1 GK |
143 | tmpbuf = gdk_pixbuf_apply_embedded_orientation(image); |
144 | g_object_unref(G_OBJECT(image)); | |
145 | image = tmpbuf; | |
50a14534 EB |
146 | |
147 | if (image) | |
19096e42 | 148 | { |
50a14534 | 149 | GdkPixbuf *thumb = save_thumbnail(path, image); |
f2fcc2d2 | 150 | g_object_unref ( G_OBJECT ( image ) ); |
50a14534 EB |
151 | return thumb; |
152 | } | |
153 | ||
154 | return NULL; | |
155 | } | |
156 | ||
157 | static GdkPixbuf *save_thumbnail(const char *pathname, GdkPixbuf *full) | |
158 | { | |
159 | struct stat info; | |
160 | gchar *path; | |
161 | int original_width, original_height; | |
6d0927b1 | 162 | const gchar* orientation; |
50a14534 EB |
163 | GString *to; |
164 | char *md5, *swidth, *sheight, *ssize, *smtime, *uri; | |
165 | mode_t old_mask; | |
166 | int name_len; | |
167 | GdkPixbuf *thumb; | |
168 | ||
169 | if (stat(pathname, &info) != 0) | |
170 | return NULL; | |
171 | ||
172 | thumb = a_thumbnails_scale_pixbuf(full, PIXMAP_THUMB_SIZE, PIXMAP_THUMB_SIZE); | |
173 | ||
6d0927b1 GK |
174 | orientation = gdk_pixbuf_get_option (full, "orientation"); |
175 | ||
50a14534 EB |
176 | original_width = gdk_pixbuf_get_width(full); |
177 | original_height = gdk_pixbuf_get_height(full); | |
178 | ||
179 | ||
180 | swidth = g_strdup_printf("%d", original_width); | |
181 | sheight = g_strdup_printf("%d", original_height); | |
182 | ssize = g_strdup_printf(ST_SIZE_FMT, info.st_size); | |
183 | smtime = g_strdup_printf("%ld", (long) info.st_mtime); | |
184 | ||
1b14d0d2 | 185 | path = file_realpath_dup(pathname); |
50a14534 EB |
186 | uri = g_strconcat("file://", path, NULL); |
187 | md5 = md5_hash(uri); | |
188 | g_free(path); | |
19096e42 | 189 | |
50a14534 | 190 | to = g_string_new(HOME_DIR); |
50a14534 | 191 | g_string_append(to, THUMB_DIR); |
50a14534 | 192 | g_string_append(to, THUMB_SUB_DIR); |
5e4cce8f RN |
193 | if ( g_mkdir_with_parents(to->str, 0700) != 0 ) |
194 | g_warning ("%s: Failed to mkdir %s", __FUNCTION__, to->str ); | |
50a14534 EB |
195 | g_string_append(to, md5); |
196 | name_len = to->len + 4; /* Truncate to this length when renaming */ | |
197 | #ifdef WINDOWS | |
198 | g_string_append_printf(to, ".png.Viking"); | |
199 | #else | |
200 | g_string_append_printf(to, ".png.Viking-%ld", (long) getpid()); | |
201 | #endif | |
202 | ||
203 | g_free(md5); | |
204 | ||
d31be35e RN |
205 | // Thumb::URI must be in ISO-8859-1 encoding otherwise gdk_pixbuf_save() will fail |
206 | // - e.g. if characters such as 'ě' are encountered | |
207 | // Also see http://en.wikipedia.org/wiki/ISO/IEC_8859-1 | |
86571e94 RN |
208 | // ATM GLIB Manual doesn't specify in which version this function became available |
209 | // find out that it's fairly recent so may break builds without this test | |
210 | #if GLIB_CHECK_VERSION(2,40,0) | |
d31be35e | 211 | char *thumb_uri = g_str_to_ascii ( uri, NULL ); |
86571e94 RN |
212 | #else |
213 | char *thumb_uri = g_strdup ( uri ); | |
214 | #endif | |
50a14534 | 215 | old_mask = umask(0077); |
56f6a97c RN |
216 | GError *error = NULL; |
217 | gdk_pixbuf_save(thumb, to->str, "png", &error, | |
19096e42 RN |
218 | "tEXt::Thumb::Image::Width", swidth, |
219 | "tEXt::Thumb::Image::Height", sheight, | |
220 | "tEXt::Thumb::Size", ssize, | |
221 | "tEXt::Thumb::MTime", smtime, | |
d31be35e | 222 | "tEXt::Thumb::URI", thumb_uri, |
19096e42 RN |
223 | "tEXt::Software", PROJECT, |
224 | "tEXt::Software::Orientation", orientation ? orientation : "0", | |
225 | NULL); | |
50a14534 | 226 | umask(old_mask); |
d31be35e | 227 | g_free(thumb_uri); |
50a14534 | 228 | |
56f6a97c RN |
229 | if (error) { |
230 | g_warning ( "%s::%s", __FUNCTION__, error->message ); | |
231 | g_error_free ( error ); | |
232 | g_object_unref ( G_OBJECT(thumb) ); | |
233 | thumb = NULL; /* return NULL */ | |
234 | } | |
235 | else | |
236 | /* We create the file ###.png.Viking-PID and rename it to avoid | |
50a14534 EB |
237 | * a race condition if two programs create the same thumb at |
238 | * once. | |
239 | */ | |
240 | { | |
241 | gchar *final; | |
242 | ||
243 | final = g_strndup(to->str, name_len); | |
244 | if (rename(to->str, final)) | |
245 | { | |
246 | g_warning("Failed to rename '%s' to '%s': %s", | |
247 | to->str, final, g_strerror(errno)); | |
248 | g_object_unref ( G_OBJECT(thumb) ); | |
249 | thumb = NULL; /* return NULL */ | |
250 | } | |
251 | ||
252 | g_free(final); | |
253 | } | |
254 | ||
255 | g_string_free(to, TRUE); | |
256 | g_free(swidth); | |
257 | g_free(sheight); | |
258 | g_free(ssize); | |
259 | g_free(smtime); | |
260 | g_free(uri); | |
261 | ||
262 | return thumb; | |
263 | } | |
264 | ||
265 | ||
266 | GdkPixbuf *a_thumbnails_get(const gchar *pathname) | |
267 | { | |
268 | GdkPixbuf *thumb = NULL; | |
269 | char *thumb_path, *md5, *uri, *path; | |
270 | const char *ssize, *smtime; | |
271 | struct stat info; | |
272 | ||
1b14d0d2 | 273 | path = file_realpath_dup(pathname); |
50a14534 EB |
274 | uri = g_strconcat("file://", path, NULL); |
275 | md5 = md5_hash(uri); | |
276 | g_free(uri); | |
19096e42 | 277 | |
50a14534 EB |
278 | thumb_path = g_strdup_printf("%s%s%s%s.png", HOME_DIR, THUMB_DIR, THUMB_SUB_DIR, md5); |
279 | ||
280 | g_free(md5); | |
281 | ||
282 | thumb = gdk_pixbuf_new_from_file(thumb_path, NULL); | |
283 | if (!thumb) | |
284 | goto err; | |
285 | ||
286 | /* Note that these don't need freeing... */ | |
287 | ssize = gdk_pixbuf_get_option(thumb, "tEXt::Thumb::Size"); | |
288 | if (!ssize) | |
289 | goto err; | |
290 | ||
291 | smtime = gdk_pixbuf_get_option(thumb, "tEXt::Thumb::MTime"); | |
292 | if (!smtime) | |
293 | goto err; | |
294 | ||
295 | if (stat(path, &info) != 0) | |
296 | goto err; | |
297 | ||
298 | if (info.st_mtime != atol(smtime) || info.st_size != atol(ssize)) | |
299 | goto err; | |
300 | ||
301 | goto out; | |
302 | err: | |
303 | if (thumb) | |
f2fcc2d2 | 304 | g_object_unref ( G_OBJECT ( thumb ) ); |
50a14534 EB |
305 | thumb = NULL; |
306 | out: | |
307 | g_free(path); | |
308 | g_free(thumb_path); | |
309 | return thumb; | |
310 | } |