lua-config(1) General Commands Manual lua-config(1)NAME
lua-config - Lua configuration information
SYNOPSIS
Basic usage
gcc ` lua-config --include ` my_prog.c -o my_prog ` lua-config --libs `
DESCRIPTION
The lua-config script allows you to determine useful information about the chosen version of lua running on the Debian GNU/Linux system in
use. More information can be found by running lua-config without any arguments.
CAVEATS
This script is unique to Debian and as such you shouldn't rely on its presence on every system. Lua is an embedded language by default and
different Linux distributions each take a different approach to making it possible to compile with Lua. The pkg-config system also provides
a way to look for libraries and is more likely to be supported across different Linux distributions. Debian's pkg-config name for Lua 5.0
is lua50 and the libraries are in lualib50. These pkg-config files can be found in the liblua50-dev and liblualib50-dev packages.
AUTHOR
lua-config was written by Daniel Silverstone <dsilvers@debian.org>.
This manual page was written by Daniel Silverstone <dsilvers@debian.org>. For the Debian project. It may be used without restriction in
any other system.
SEE ALSO lua(1)pkg-config(1)lua-config(1)
Check Out this Related Man Page
doc::lua-oocairo-scaledfont(3) Lua OO Cairo binding doc::lua-oocairo-scaledfont(3)Name
lua-oocairo-scaledfont - Scaled font face object
Introduction
Scaled font objects represent Cairo font faces which have been scaled to a particular point size. They can be created from a font face
object with the "scaled_font_create" function in the main module table (see lua-oocairo(3)), or the "get_scaled_font" method on context
objects (see lua-oocairo-context(3)).
Scaled font objects can be compared with the "==" operator. This will compare the identity of the objects, so different Lua objects which
refer to the same "cairo_font_face_t" will compare as equal.
Methods
Scaled font objects provide the following methods.
font:extents ()
Returns a table containing metrics information about the font. The return value is in the same format as that of the "font_extents"
method on context objects (see lua-oocairo-context(3)).
font:get_ctm ()
Returns the coordinate transformation matrix (CTM) associated with the font. This maps user coordinates into device coordinates on the
surface with which the font is used. See lua-oocairo-matrix(3) for details of the return value type.
font:get_font_face ()
Returns an object representing the unscaled font face used to create this font. See lua-oocairo-fontface(3) for details of its
methods.
font:get_font_matrix ()
Returns the matrix representing the scaling of the font into user coordinates. See lua-oocairo-matrix(3) for details of the return
value type.
cr:get_font_options ()
Returns a font options object (see lua-oocairo-fontopt(3)) containing the rendering options that were supplied when creating this font.
font:get_scale_matrix ()
Returns a matrix table representing the scaling of the font to the coordinate space of the surface it is used on. This is the matrix
obtained by multiplying the font matrix by the surface CTM. See lua-oocairo-matrix(3) for details of the return value type. Only
available with Cairo 1.8 or better.
font:get_type ()
Returns a string indicating which back-end library provides the font face information. The return value will be one of the same
strings returned by the "get_type" method on a font face object (see lua-oocairo-fontface(3)).
font:glyph_extents (glyphs)
Same as "font:text_extents()", but instead of a string, the glyphs value should be table in the format accepted by the "show_glyphs()"
method on context objects (see lua-oocairo-context(3)).
font:text_extents (text)
Returns a table containing measurements of the given UTF-8 text as it would be rendered in this font. The return value is in the same
format as that of the "text_extents" method on context objects (see lua-oocairo-context(3)).
font:text_to_glyphs (x, y, text)
Given some UTF-8 text in the string text, and starting coordinates of x and y, this works out which glyphs need to be drawn to
represent the text, and which glyphs correspond to the bytes in text. The method returns two tables, the first an array of glyphs
suitable for supplying to methods like "show_glyphs" and "glyph_extents", and the second is a table of text clusters suitable for
supplying to the "show_text_glyphs" method on a context object.
Only available with Cairo 1.8 or better.
1.4 2011-05-18 doc::lua-oocairo-scaledfont(3)