1 | NAME |
1 | NAME |
2 | cv - a fast gtk+ image viewer modeled after xv |
2 | cv - a fast gtk+ image viewer loosely modeled after XV |
3 | |
3 | |
4 | SYNOPSIS |
4 | SYNOPSIS |
5 | cv [file...] |
5 | cv |
|
|
6 | |
|
|
7 | cv directory |
|
|
8 | |
|
|
9 | cv path... |
|
|
10 | |
|
|
11 | cv -g <glob expression...> |
|
|
12 | |
|
|
13 | find .. -print0 | cv -0r |
|
|
14 | |
|
|
15 | FEATURES |
|
|
16 | CV is supposed to work similar to the venerable XV image viewer, just |
|
|
17 | faster. Why faster? |
|
|
18 | |
|
|
19 | * optimized directory scanning algorithm |
|
|
20 | |
|
|
21 | The directory scanning in CV uses some tricks that - on most modern |
|
|
22 | filesystems - makes it possible to detect filetypes faster than |
|
|
23 | stat()'ing every file. This makes CV suitable for directories with |
|
|
24 | lots of files (10000+). |
|
|
25 | |
|
|
26 | This algorithm is quite unprecise - it doesn't make a difference |
|
|
27 | between files, device nodes, symlinks and the like, and filetype |
|
|
28 | detection is done using the file extension only. |
|
|
29 | |
|
|
30 | On the positive side, it is usually many orders of magnitude faster |
|
|
31 | than traditional scanning techniques (good for directories with |
|
|
32 | 10000 or 100000+ files). |
|
|
33 | |
|
|
34 | * queuing for all time-consuming background tasks |
|
|
35 | |
|
|
36 | All tasks, such as unlinking files or generating thumbnails, that |
|
|
37 | can be done in the background will be done so - no waiting required, |
|
|
38 | even when changing directories. |
|
|
39 | |
|
|
40 | * use of asynchronous I/O |
|
|
41 | |
|
|
42 | CV tries to use asynchronous I/O whereever it makes sense, for |
|
|
43 | example while scanning directories, waiting for stat data, unlinking |
|
|
44 | files or generating thumbnails. This usually decreases scanning |
|
|
45 | times for large directories a bit (especially on RAID devices and |
|
|
46 | over NFS) and makes CV much more interactive. |
|
|
47 | |
|
|
48 | * fast image loading |
|
|
49 | |
|
|
50 | The time span between the user issuing a command and displaying the |
|
|
51 | new image should be as small as possible. CV uses optimized |
|
|
52 | (especially for JPEG) loading functions and sacrifices some quality |
|
|
53 | (e.g no gamma correction, although this might change) to achieve |
|
|
54 | this speed. |
|
|
55 | |
|
|
56 | * fast thumbnail creation |
|
|
57 | |
|
|
58 | Thumbnail creation uses both CPU and Disk-I/O. CV interleaves both, |
|
|
59 | so on modern CPUs, thumbnailing is usually limited by I/O speed. |
|
|
60 | Thumbnail creation for JPEGs has been specially optimized and can |
|
|
61 | even take advantage of multiple CPUs. |
|
|
62 | |
|
|
63 | * minimum optical clutter |
|
|
64 | |
|
|
65 | CV has no menus or other user interface elements that take up a lot |
|
|
66 | of screen space (or are useful for beginning users). The schnauzer |
|
|
67 | windows can also be somewhat crowded. |
|
|
68 | |
|
|
69 | The point of an image viewer is viewing images, not a nice GUI. This |
|
|
70 | is similar to XV's behaviour. |
|
|
71 | |
|
|
72 | * efficient (and hard to learn) user interface |
|
|
73 | |
|
|
74 | CV uses key combinations. A lot. If you are an experienced XV user, |
|
|
75 | you will find most of these keys familiar. If not, CV might be hard |
|
|
76 | to use at first, but will be an efficient tool later. |
|
|
77 | |
|
|
78 | * multi-window GUI |
|
|
79 | |
|
|
80 | CV doesn't force you to use a specific layout, instead it relies on |
|
|
81 | your window manager, thus enabling you to chose whatever layout that |
|
|
82 | suits you most. |
|
|
83 | |
|
|
84 | * i18n'ed filename handling throughout |
|
|
85 | |
|
|
86 | As long as glib can recognize your filename encoding (either UTF-8 |
|
|
87 | or locale-specific, depending on the setting of G_BROKEN_FILENAMES) |
|
|
88 | and you have the relevant fonts, CV will display your filenames |
|
|
89 | correctly. |
|
|
90 | |
|
|
91 | * extensible through plug-ins |
|
|
92 | |
|
|
93 | I have weird plug-ins that access remote databases to find a |
|
|
94 | directory. This is not likely to be of any use to other people. |
|
|
95 | Likewise, others might have weird requirements I cannot dream of. |
|
|
96 | |
|
|
97 | * filename clustering |
|
|
98 | |
|
|
99 | Among the standard plug-ins is a filename clustering plug-in, that |
|
|
100 | (in case of tens of thousands images in one directory) might be able |
|
|
101 | to cluster similar names together. |
6 | |
102 | |
7 | DESCRIPTION |
103 | DESCRIPTION |
8 | None yet. |
|
|
9 | |
|
|
10 | THE IMAGE WINDOW |
104 | THE IMAGE WINDOW |
11 | You can use the following keys in the image window: |
105 | You can use the following keys in the image window: |
12 | |
106 | |
13 | q quit the program |
107 | q quit the program |
14 | < half the image size |
108 | < half the image size |
15 | > double the image size |
109 | > double the image size |
16 | , shrink the image by 10% |
110 | , shrink the image by 10% |
17 | . enlarge the image by 10% |
111 | . enlarge the image by 10% |
18 | n reset to normal size |
112 | n reset to normal size |
19 | m maximize to screensize |
113 | m maximize to screensize |
20 | M maxime to screensize, respecting image aspect |
114 | M maximize to screensize, respecting image aspect |
21 | ctrl-m toggle maxpect-always mode |
115 | ctrl-m toggle maxpect-always mode |
|
|
116 | ctrl-sift-m toggle using current image size as max image size |
22 | u uncrop |
117 | u uncrop |
23 | r set scaling mode to 'nearest' (fastest) |
118 | r set scaling mode to 'nearest' (fastest) |
24 | s set scaling mode to 'bilinear' (default) |
119 | s set scaling mode to 'bilinear' (default) |
25 | S set scaling mode to 'hyper' (slowest) |
120 | shift-s set scaling mode to 'hyper' (slowest) |
26 | t rotate clockwise 90° |
121 | t rotate clockwise 90° |
27 | T rotate counterclockwise° |
122 | T rotate counterclockwise° |
|
|
123 | a apply all rotations loslessly to a jpeg file (using exiftran) |
|
|
124 | ctrl-shift-t apply current rotation for future image loads |
28 | ctrl-v open a new visual schnauzer window for the current dir |
125 | ctrl-v open a new visual schnauzer window for the current dir |
29 | ctrl-s rescan visual schnauzer files for updates/deletes etc. |
126 | ctrl-c clone the current image window |
30 | ctrl-e run an editor ($CV_EDITOR or "gimp") on the current image. |
127 | ctrl-e run an editor ($CV_EDITOR or "gimp") on the current image |
|
|
128 | ctrl-p fire up the print dialog |
|
|
129 | ctrl-shift-p same as ctrl-p, but automatically selects "ok" |
|
|
130 | escape cancel a crop action |
31 | |
131 | |
32 | The following keys are redirected to the default visual schnauzer |
132 | And when playing movies, these additional keys are active: |
33 | window: |
|
|
34 | |
133 | |
35 | space next image |
134 | left rewind by 10 seconds |
36 | backspace last image |
135 | right forward by 10 seconds |
|
|
136 | down rewind by 60 seconds |
|
|
137 | up forward by 60 seconds |
|
|
138 | pg_up rewind by 600 seconds |
|
|
139 | pg_down forward by 600 seconds |
|
|
140 | o toggle on-screen display |
|
|
141 | p pause/unpause |
|
|
142 | escape stop playing |
|
|
143 | 9 turn volume down |
|
|
144 | 0 turn volume up |
|
|
145 | |
|
|
146 | Any other keys will be sent to the default schnauzer window, which can |
|
|
147 | be toggled on and off by right-clicking into the image window. |
|
|
148 | |
|
|
149 | Left-clicking into the image window will let you crop the image (usually |
|
|
150 | to zoom into large images that CV scales down). |
37 | |
151 | |
38 | THE VISUAL SCHNAUZER |
152 | THE VISUAL SCHNAUZER |
|
|
153 | Any image-loading action in a schnauzer window acts on the |
|
|
154 | "last-recently-activated" imagewindow, which currently is simply the |
|
|
155 | last image window that received a keypress. |
|
|
156 | |
39 | You can use the following keys in the schnauzer window: |
157 | You can use the following keys in the schnauzer window: |
40 | |
158 | |
|
|
159 | ctrl-space, |
41 | space move to and display next image |
160 | space move to and display next image |
|
|
161 | ctrl-backspace, |
42 | backspace move to and display previous image |
162 | backspace move to and display previous image |
|
|
163 | ctrl-return, |
43 | return display selected picture |
164 | return display selected picture, or enter directory |
44 | |
165 | |
45 | cursor keys move selection |
166 | cursor keys move selection |
46 | page-up move one page up |
167 | page-up move one page up |
47 | page-down move one page down |
168 | page-down move one page down |
48 | home move to first file |
169 | home move to first file |
49 | end move to last file |
170 | end move to last file |
50 | |
171 | |
|
|
172 | ctrl-a select all files |
|
|
173 | ctrl-shift-a select all files currently displayed in the schnauzer window |
51 | ctrl-d delete selected files WITHOUT ASKING AGAIN |
174 | ctrl-d delete selected files WITHOUT ASKING AGAIN |
52 | ctrl-g generate icons for the selected files |
175 | ctrl-g force generation of thumbnails for the selected files |
|
|
176 | ctrl-shift-g remove thumbnails for the selected files |
|
|
177 | ctrl-s rescan current direcory or files updates/deletes etc. |
53 | ctrl-u update selected (or all) icons if neccessary |
178 | ctrl-u update selected (or all) icons if neccessary |
|
|
179 | ctrl-- unselected thumbnailed images |
|
|
180 | ctrl-+ keep only thumbnailed images, deselect others |
54 | |
181 | |
55 | ENVIRONMENT |
182 | ^ go to parent directory (caret). |
|
|
183 | |
|
|
184 | 0-9, |
|
|
185 | a-z find the first filename beginning with this letter |
|
|
186 | |
|
|
187 | Right-clicking into the schnauzer window displays a pop-up menu with |
|
|
188 | additional actions. |
|
|
189 | |
|
|
190 | SELECTION |
|
|
191 | You can select entries in the Schnauzer in a variety of ways: |
|
|
192 | |
|
|
193 | Keyboard |
|
|
194 | Moving the cursor with the keyboard will first deselect all files |
|
|
195 | and then select the file you moved to. |
|
|
196 | |
|
|
197 | Clicking |
|
|
198 | Clicking on an entry will select the one you clicked and deselect |
|
|
199 | all others. |
|
|
200 | |
|
|
201 | Shift-Clicking |
|
|
202 | Shift-clicking will toggle the selection on the entry under the |
|
|
203 | mouse. |
|
|
204 | |
|
|
205 | Dragging |
|
|
206 | Dragging will select all entries between the one selected when |
|
|
207 | pushing the button and the one selected when releasing the button. |
|
|
208 | If you move above or below the schnauzer area while drag-selecting, |
|
|
209 | the schnauzer will move up/down one row twice per second. In |
|
|
210 | addition, horizontal mouse movement acts as a kind of invisible |
|
|
211 | horizontal scrollbar. |
|
|
212 | |
|
|
213 | Hint: double-click works while click-selecting |
|
|
214 | You can double-click any image while click-selecting to display it |
|
|
215 | without stopping the selection process. This will act as if you |
|
|
216 | normally double-clicked the image to display it, and will toggle the |
|
|
217 | selection twice, resulting in no change. |
|
|
218 | |
|
|
219 | FILES |
|
|
220 | When starting, CV runs the .cvrc file in your $HOME directory as if it |
|
|
221 | were a perl script. in that, you will mostly load plug-ins. |
|
|
222 | |
|
|
223 | Example: |
|
|
224 | |
|
|
225 | system "fping -q -t 10 ether" |
|
|
226 | or require "/fs/cv/cvplugin.pl"; |
|
|
227 | |
|
|
228 | This will load a plug-in, but only if the machine *ether* is reachable |
|
|
229 | (supposedly the plug-in is networked in some way :). |
|
|
230 | |
|
|
231 | ENVIRONMENT VARIABLES |
|
|
232 | CV_EDITOR |
|
|
233 | The program that gets executed when the user presses "CTRL-e" in the |
|
|
234 | Schnauzer or image window. The default is "gimp". |
|
|
235 | |
|
|
236 | CV_AUDIO_PLAYER |
|
|
237 | Program used to play all sorts of audio (wav, aif, mp3, ogg...), |
|
|
238 | default "play". Will be called like "$CV_AUDIO_PLAYER -- <path>". |
|
|
239 | |
56 | CV_PRINT_DESTINATION |
240 | CV_PRINT_DESTINATION |
57 | The default (perl-style) destination to use in the print dialog. |
241 | The default (perl-style) destination to use in the print dialog. |
58 | |
242 | |
|
|
243 | CV_TRASHCAN |
|
|
244 | When set, must point to a directory where all files that are deleted |
|
|
245 | by the "Delete Physically" (ctrl-d) action are moved to (other |
|
|
246 | deletion actions still delete!). If unset, files that are deleted |
|
|
247 | are really being deleted. |
|
|
248 | |
|
|
249 | SIGNALS |
|
|
250 | Sending CV a SIGUSR1 signal will cause all image viewers to reload the |
|
|
251 | currently loaded image. This is useful if you use CV as a viewer for |
|
|
252 | changing data - just run it in the background with some path and each |
|
|
253 | time the image changes, send it a SIGUSR1. |
|
|
254 | |
59 | SECURITY CONSIDERATIONS |
255 | SECURITY CONSIDERATIONS |
60 | CV uses Pixbuf to load images. Pixbuf is not considered safe for this |
256 | CV uses Pixbuf to load non-JPEG images. Pixbuf is not considered safe |
61 | purpose, though (from the gtk-2.2 release notes): |
257 | for this purpose, though (from the gtk-2.2 release notes): |
62 | |
258 | |
63 | "While efforts have been made to make gdk-pixbuf robust against invalid |
259 | "While efforts have been made to make gdk-pixbuf robust against invalid |
64 | images, using gdk-pixbuf to load untrusted data is not recommended, due |
260 | images, using gdk-pixbuf to load untrusted data is not recommended, due |
65 | to the likelyhood that there are additional problems where an invalid |
261 | to the likelyhood that there are additional problems where an invalid |
66 | image could cause gdk-pixbuf to crash or worse." |
262 | image could cause gdk-pixbuf to crash or worse." |
67 | |
263 | |
68 | BUGS/TODO |
264 | BUGS/TODO |
|
|
265 | Lots of functionality is missing. |
|
|
266 | |
69 | Pixbuf doesn't honor G_BROKEN_FILENAMES, so accessing files with names |
267 | Pixbuf doesn't always honor G_BROKEN_FILENAMES, so accessing files with |
70 | incompatible with utf-8 fails. |
268 | names incompatible with utf-8 might fail. |
71 | |
269 | |
72 | rotate on disk |
270 | rotate on disk |
73 | print |
|
|
74 | lots of ui issues |
271 | lots of ui issues |
75 | save(?) |
272 | save(?) |
76 | preferences |
273 | preferences |
77 | ctrl-u in schnauzer |
|
|
78 | shift-cursor in schnauzer |
|
|
79 | |
274 | |
80 | AUTHOR |
275 | AUTHOR |
81 | Marc Lehmann <cv@plan9.de>. |
276 | Marc Lehmann <cv@plan9.de>. |
82 | |
277 | |