@end defvar
@defvar after-make-frame-functions
-@tindex after-make-frame-functions
An abnormal hook run by @code{make-frame} after it creates the frame.
Each function in @code{after-make-frame-functions} receives one argument, the
frame just created.
frame.
@defun frame-parameter frame parameter
-@tindex frame-parameter
This function returns the value of the parameter @var{parameter} (a
symbol) of @var{frame}. If @var{frame} is @code{nil}, it returns the
selected frame's parameter. If @var{frame} has no setting for
those above) by setting @code{void-text-area-pointer}.
@defvar void-text-area-pointer
-@tindex void-text-area-pointer
This variable specifies the mouse pointer style for void text areas.
These include the areas after the end of a line or below the last line
in the buffer. The default is to use the @code{arrow} (non-text)
meaning of the term ``selected frame''.
@defun color-defined-p color &optional frame
-@tindex color-defined-p
This function reports whether a color name is meaningful. It returns
@code{t} if so; otherwise, @code{nil}. The argument @var{frame} says
which frame's display to ask about; if @var{frame} is omitted or
@end defun
@defun defined-colors &optional frame
-@tindex defined-colors
This function returns a list of the color names that are defined
and supported on frame @var{frame} (default, the selected frame).
If @var{frame} does not support colors, the value is @code{nil}.
@end defun
@defun color-supported-p color &optional frame background-p
-@tindex color-supported-p
This returns @code{t} if @var{frame} can really display the color
@var{color} (or at least something close to it). If @var{frame} is
omitted or @code{nil}, the question applies to the selected frame.
@end defun
@defun color-gray-p color &optional frame
-@tindex color-gray-p
This returns @code{t} if @var{color} is a shade of gray, as defined on
@var{frame}'s display. If @var{frame} is omitted or @code{nil}, the
question applies to the selected frame. If @var{color} is not a valid
@end defun
@defun color-values color &optional frame
-@tindex color-values
@cindex rgb value
This function returns a value that describes what @var{color} should
ideally look like on @var{frame}. If @var{color} is defined, the
the @var{frame} argument has no effect.
@defun tty-color-define name number &optional rgb frame
-@tindex tty-color-define
This function associates the color name @var{name} with
color number @var{number} on the terminal.
@end defun
@defun tty-color-clear &optional frame
-@tindex tty-color-clear
This function clears the table of defined colors for a text-only terminal.
@end defun
@defun tty-color-alist &optional frame
-@tindex tty-color-alist
This function returns an alist recording the known colors supported by a
text-only terminal.
@end defun
@defun tty-color-approximate rgb &optional frame
-@tindex tty-color-approximate
This function finds the closest color, among the known colors
supported for @var{display}, to that described by the rgb value
@var{rgb} (a list of color values). The return value is an element of
@end defun
@defun tty-color-translate color &optional frame
-@tindex tty-color-translate
This function finds the closest color to @var{color} among the known
colors supported for @var{display} and returns its index (an integer).
If the name @var{color} is not defined, the value is @code{nil}.
obtain information about displays.
@defun display-popup-menus-p &optional display
-@tindex display-popup-menus-p
This function returns @code{t} if popup menus are supported on
@var{display}, @code{nil} if not. Support for popup menus requires that
the mouse be available, since the user cannot choose menu items without
@end defun
@defun display-graphic-p &optional display
-@tindex display-graphic-p
@cindex frames, more than one on display
@cindex fonts, more than one on display
This function returns @code{t} if @var{display} is a graphic display
@end defun
@defun display-mouse-p &optional display
-@tindex display-mouse-p
@cindex mouse, availability
This function returns @code{t} if @var{display} has a mouse available,
@code{nil} if not.
@end defun
@defun display-color-p &optional display
-@tindex display-color-p
@findex x-display-color-p
This function returns @code{t} if the screen is a color screen.
It used to be called @code{x-display-color-p}, and that name
@end defun
@defun display-grayscale-p &optional display
-@tindex display-grayscale-p
This function returns @code{t} if the screen can display shades of gray.
(All color displays can do this.)
@end defun
@defun display-supports-face-attributes-p attributes &optional display
@anchor{Display Face Attribute Testing}
-@tindex display-supports-face-attributes-p
This function returns non-@code{nil} if all the face attributes in
@var{attributes} are supported (@pxref{Face Attributes}).
@end defun
@defun display-selections-p &optional display
-@tindex display-selections-p
This function returns @code{t} if @var{display} supports selections.
Windowed displays normally support selections, but they may also be
supported in some other cases.
@end defun
@defun display-screens &optional display
-@tindex display-screens
This function returns the number of screens associated with the display.
@end defun
@defun display-pixel-height &optional display
-@tindex display-pixel-height
This function returns the height of the screen in pixels.
On a character terminal, it gives the height in characters.
@end defun
@defun display-mm-height &optional display
-@tindex display-mm-height
This function returns the height of the screen in millimeters,
or @code{nil} if Emacs cannot get that information.
@end defun
@defun display-pixel-width &optional display
-@tindex display-pixel-width
This function returns the width of the screen in pixels.
On a character terminal, it gives the width in characters.
@end defun
@defun display-mm-width &optional display
-@tindex display-mm-width
This function returns the width of the screen in millimeters,
or @code{nil} if Emacs cannot get that information.
@end defun
@defun display-backing-store &optional display
-@tindex display-backing-store
This function returns the backing store capability of the display.
Backing store means recording the pixels of windows (and parts of
windows) that are not exposed, so that when exposed they can be
@end defun
@defun display-save-under &optional display
-@tindex display-save-under
This function returns non-@code{nil} if the display supports the
SaveUnder feature. That feature is used by pop-up windows
to save the pixels they obscure, so that they can pop down
@end defun
@defun display-planes &optional display
-@tindex display-planes
This function returns the number of planes the display supports.
This is typically the number of bits per pixel.
For a tty display, it is log to base two of the number of colors supported.
@end defun
@defun display-visual-class &optional display
-@tindex display-visual-class
This function returns the visual class for the screen. The value is one
of the symbols @code{static-gray}, @code{gray-scale},
@code{static-color}, @code{pseudo-color}, @code{true-color}, and
@end defun
@defun display-color-cells &optional display
-@tindex display-color-cells
This function returns the number of color cells the screen supports.
@end defun