3 jpg, gif, png, ppm, bmp, v210, yuv, ico, tga, togif, toppm, topng, toico \- view and convert pictures
111 These programs read, display, and write image files in public formats.
121 read files in the corresponding formats and, by default, display
122 them in the current window; options cause them instead to convert the images
123 to Plan 9 image format and write them to standard output.
128 read Plan 9 images files, convert them to GIF, PPM, or PNG, and write them to standard output.
130 The default behavior of
137 or standard input if no file is named.
138 Once a file is displayed, typing a character causes the program to display the next image.
141 DEL, or control-D exits the program.
142 For a more user-friendly interface, use
144 which invokes these programs to convert the images to standard format,
145 displays them, and offers scrolling, panning, and menu-driven navigation among the files.
147 These programs share many options:
150 Disable Floyd-Steinberg error diffusion, which is used to improve the appearance
151 of images on color-mapped displays, typically with 8 bits per pixel.
152 Primarily useful for debugging; if the display has true RGB color, the image
153 will be displayed in full glory.
156 Convert and display the image as a black and white (really grey-scale) image.
159 Convert the image to an RGBV color-mapped image, even if the
160 display has true RGB color.
163 Suppress display of the image; this is set automatically by
164 any of the following options:
167 Convert the image to a Plan 9 representation, as defined by
169 and write it to standard output.
174 but produce an uncompressed image.
175 This saves processing time, particularly when the output is
176 being piped to another program such as
178 since it avoids compression and decompression.
181 Convert the image, if it is in color, to a true color RGB image.
186 but force the image to RGB even if it is originally grey-scale.
190 has two extra options used to process the output of the LML
194 Merge two adjacent images, which represent the two fields of a video picture,
198 The input is a motion JPEG file, with multiple images representing frames of the movie. Sets
206 programs go the other way: they convert from Plan 9 images to GIF and PPM,
207 and have no display capability.
208 Both accept an option
210 to set the comment field of the resulting file.
211 If there is only one input picture,
213 converts the image to GIF format.
216 though, it will assemble them into an animated GIF file.
217 The options control this process:
220 By default, the animation will loop forever;
222 specifies how many times to loop.
223 A value of zero means loop forever and a negative value means
224 to stop after playing the sequence once.
227 By default, the images are displayed as fast as they can be rendered.
228 This option specifies the time, in milliseconds, to pause while
229 displaying the next named
233 translates files that contain a `transparency' index by attaching
234 an alpha channel to the converted image.
237 displays or converts a Windows icon (.ico) file. If no file is
240 reads from standard input.
242 contain sets of icons represented by an image and a mask. The
246 to convert the first icon in the set and write it to standard
247 output in compressed Plan 9 image format. Otherwise, the whole
248 icon set is displayed.
249 Clicking the right button pops up a menu that lets you
250 write any icon's image as a Plan 9 image (\fIwidth\fBx\fIheight\fB.image\fR),
251 write any icon's mask as a Plan 9 image (\fIwidth\fBx\fIheight\fB.mask\fR),
252 or exit. Selecting one of the write menu items yields a sight cursor.
253 Move the sight over the icon and right click again to write.
256 takes a list of Plan 9 image files (or standard input) and creates
257 a single icon file. The masks in the icon file will be the white
258 space in the image. The icon file is written to standard output.
265 .B http://www.w3.org/Graphics/JPEG/itu-t81.pdf
267 .B http://www.w3.org/Graphics/GIF/spec-gif89a.txt
269 .B http://www.w3.org/TR/2003/REC-PNG-20031110
271 .B http://netpbm.sourceforge.net/doc/ppm.html
273 .B http://en.wikipedia.org/wiki/Windows_bitmap
275 .B http://en.wikipedia.org/wiki/Yuv
277 Writing an animated GIF using
279 is a clumsy undertaking.