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KEYWORDS
| for (exp) [statements] | Performs the statements if exp is true. |
| if (exp) [statements] (else [statements]) | Performs the statement if the exp is true. Can also be used with the else extension; in this case, the alternate statements will be performed. |
| while (exp) [statements] | Repeats the statement if exp is true. |
| break | Ends a for or while statement. |
| continue | Jumps to the next iteration in a for statement. This is a GNU extension. |
| define a(b) | Defines the function a with the argument b. |
GNU EXTENSIONS
| halt | Halts the bc command. |
| limits | Returns the local limits on the bc command. |
| print list | An odd command used to print a series of special characters. The list is a list of comma-delimited expressions and strings, printed in order. |
Strings can include special characters, including the following:
| a | bell |
| b | backspace |
| f | form feed |
| n | newline |
| r | return |
| q | double quote |
| t | tab |
| \ | backslash |
OTHER OPERATORS AND KEYWORDS
| assignment | =+ =- =* =/ =^ = |
| relational | < <= > >= == != |
| unary | - ++ — |
MATH-LIBRARY FUNCTIONS
| s | Sine. |
| c | Cosine. |
| a | Arctangent. |
| e | Exponential; base e. |
| l | Natural logarithm. |
| j(n,x) | Bessel function. |
OTHER SYMBOLS
| /* */ | Comment lines. |
| { } | Brackets statements. |
| [ ] | Array index. |
bdftopcf......Bitmap Font Conversion
bdftopcf option(s) fontfile.bdf
PURPOSE
The bdftopcf command converts fonts from the X Bitmap Distribution Format (BDF) to the Portable Compiled Format (PCF), which is more easily used by the X font server. PCF fonts can be read by any machine.
OPTIONS
| -i | Inhibits computation of ink metrics. Bypassing computation can speed processing. |
| -l | Sets the font bit order to least significant bit (LSB) first. |
| -L | Sets the font byte order to least significant bit (LSB) first. |
| -m | Sets the font bit order to most significant bit (MSB) first. |
| -M | Sets the font byte order to most significant bit (MSB) first. |
| -o outputfile | Specifies the name of the output file. |
| -pn | Padding for the font glyph is set to n. Each glyph has each scanline padded to 1, 2, 4, or 8 bytes. |
| -t | Convert fonts to “terminal fonts” when possible. This option allows fonts to rendered more quickly by the font server. |
| -un | Sets the font scanline unit to n. This option is necessary when the font bit order is different than the font byte order; n can be 1, 2, or 4 bytes. |
EXAMPLE
$ bdftopcf -t -o fontfile.pcf fontfile.dbf
bitmap......Bitmap Editor
bitmap option(s) filename basename
PURPOSE
The bitmap program is used to create and edit bitmaps. Bitmaps are image files laid out in a grid and used in the X Window System for a variety of purposes, from icons and cursors to Web-page graphic elements. They are stored as actual C code, which can be inserted directly into programs.
This program can specify a “hot spot” for use with a cursor, which tells the window manager where the cursor is specifically pointing, such as a tip of an arrow or the middle of a crosshair.
The basename is used with the C code input file.
To see how the image will actually appear, press Alt-I.
There are a number of commands available when this program is actually running, such as inverting the present image and marking a section of the bitmap. These are available through buttons on the left side of the window.
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