From 058b0118a52061ad57694c01fc8763b22b789c4d Mon Sep 17 00:00:00 2001 From: rsc Date: Mon, 3 Jan 2005 06:40:20 +0000 Subject: Some man pages. --- man/man1/tweak.1 | 167 +++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 167 insertions(+) create mode 100644 man/man1/tweak.1 (limited to 'man/man1/tweak.1') diff --git a/man/man1/tweak.1 b/man/man1/tweak.1 new file mode 100644 index 00000000..511e1ce8 --- /dev/null +++ b/man/man1/tweak.1 @@ -0,0 +1,167 @@ +.TH TWEAK 1 +.CT 1 graphics +.SH NAME +tweak \- edit image files, subfont files, face files, etc. +.SH SYNOPSIS +.B tweak +[ +.I file ... +] +.SH DESCRIPTION +.I Tweak +edits existing files holding various forms of images. +To create original images, start from an existing image, subfont, etc. +.PP +.I Tweak +reads its argument +.I files +and displays the resulting images in a vertical column. +If the image is too wide to fit across the display, it +is folded much like a long line of text in an +.IR rio +window. +Under each image is displayed one or two lines of text +presenting its parameters. +The first line shows the image's +.BR depth , +the number +of bits per pixel; +.BR r , +the rectangle covered by the image; +and the name of the +.B file +from which it was read. +If the file is a subfont, a second line presents a hexadecimal 16-bit +.B offset +to be applied to character values from the subfont +(typically as stored in a font file; see +.IR font (7)); +and the subfont's +.BR n , +.BR height , +and +.B ascent +as defined in +.IR cachechars (3). +.PP +By means described below, magnified views of portions of the images +may be displayed. +The text associated with such a view includes +.BR mag , +the magnification. +If the view is of a single character from a subfont, the second +line of text shows the character's value (including the subfont's offset) +in hexadecimal and as a character in +.I tweak's +default font; the character's +.BR x , +.BR top , +.BR bottom , +.BR left , +and +.BR width +as defined in +.IR cachechars (3); +and +.BR iwidth , +the physical width of the image in the subfont's image. +.PP +There are two methods to obtain a magnified view of a character from a +subfont. +The first is to click mouse button 1 over the image of the character in +the subfont. The second is to select the +.B char +entry on the button 3 menu, +point the resulting gunsight cursor at the desired subfont and click button 3, +and then type at the text prompt at the bottom of the screen the +character value, either as a multi-digit hexadecimal number or as a single +rune representing the character. +.PP +To magnify a portion of other types of image files, +click button 1 over the unmagnified file. +The cursor will switch to a cross. +Still with button 1, sweep a rectangle, as in +.BR rio , +that encloses the portion of the image to be magnified. +(If the file is 16×16 or smaller, +.I tweak +will just magnify the entire file; no sweeping is necessary.) +.PP +Pressing buttons 1 and 2 within magnified images changes pixel values. +By default, button 1 sets the pixel to all zeros and button 2 sets the pixel +to all ones. +.PP +Across the top of the screen is a textual display of global parameters. +These values, as well as many of the textual values associated with +the images, may be edited by clicking button 1 on the displayed +value and typing a new value. +The values along the top of the screen are: +.TP +.B mag +Default magnification. +.TP +.B val(hex) +The value used to modify pixels within magnified images. +The value must be in hexadecimal, optionally preceded by a +tilde for bitwise negation. +.TP +.B but1 +.TP +.B but2 +The pixel value written when the corresponding button is pressed over a pixel. +.TP +.B invert-on-copy +Whether the pixel values are inverted when a +.B copy +operation is performed. +.PP +Under button 3 is a menu holding a variety of functions. +Many of these functions prompt for the image upon which to act +by switching to a gunsight cursor; click button 3 over the +selection, or click a different button to cancel the action. +.TP +.B open +Read and display a file. The name of the file is typed to the prompt +on the bottom line. +.TP +.B read +Reread a file. +.TP +.B write +Write a file. +.TP +.B copy +Use the copy function, default +.BR S , +to transfer a rectangle of pixels from one image to another. +The program prompts with a cross cursor; sweep out a rectangle in +one image or just click button 3 to select the whole image. +The program will leave that rectangle in place and +attach another one to the cursor. Move that rectangle to the desired +place in any image and click button 3, or another button to cancel the action. +.TP +.B char +As described above, open a magnified view of a character image in a subfont. +.TP +.B pixels +Report the coordinate and value of individual pixels indicated by pressing button 3. +This is a mode of operation canceled by pressing button 1 or 2. +.TP +.B close +Close the specified image. +If the image is the unmagnified file, also close any magnified views of that file. +.TP +.B exit +Quit +.IR tweak . +The program will complain once about modified but unwritten files. +.SH SOURCE +.B /usr/local/plan9/src/cmd/draw/tweak.c +.SH "SEE ALSO" +.IR cachechars (3), +.IR image (7), +.IR font (7) +.SH BUGS +For a program written to adjust width tables in fonts, +.I tweak +has been pushed unreasonably far. -- cgit v1.2.3