Интерактивная система просмотра системных руководств (man-ов)
XStoreColors (3)
>> XStoreColors (3) ( Разные man: Библиотечные вызовы )
NAME
XStoreColors, XStoreColor, XStoreNamedColor - set colors
SYNTAX
int XStoreColors(Display *display, Colormap colormap,
XColor color[], int ncolors);
int XStoreColor(Display *display, Colormap colormap,
XColor *color);
int XStoreNamedColor(Display *display, Colormap colormap,
char *color, unsigned long pixel, int flags);
ARGUMENTS
color
Specifies the pixel and RGB values or the color name string (for example, red).
color
Specifies an array of color definition structures to be stored.
colormap
Specifies the colormap.
display
Specifies the connection to the X server.
flags
Specifies which red, green, and blue components are set.
ncolors
Specifies the number of
XColor
structures in the color definition array.
pixel
Specifies the entry in the colormap.
DESCRIPTION
The
XStoreColors
function changes the colormap entries of the pixel values
specified in the pixel members of the
XColor
structures.
You specify which color components are to be changed by setting
DoRed,
DoGreen,
and/or
DoBlue
in the flags member of the
XColor
structures.
If the colormap is an installed map for its screen, the
changes are visible immediately.
XStoreColors
changes the specified pixels if they are allocated writable in the colormap
by any client, even if one or more pixels generates an error.
If a specified pixel is not a valid index into the colormap, a
BadValue
error results.
If a specified pixel either is unallocated or is allocated read-only, a
BadAccess
error results.
If more than one pixel is in error,
the one that gets reported is arbitrary.
XStoreColors
can generate
BadAccess,
BadColor,
and
BadValue
errors.
The
XStoreColor
function changes the colormap entry of the pixel value specified in the
pixel member of the
XColor
structure.
You specified this value in the
pixel member of the
XColor
structure.
This pixel value must be a read/write cell and a valid index into the colormap.
If a specified pixel is not a valid index into the colormap,
a
BadValue
error results.
XStoreColor
also changes the red, green, and/or blue color components.
You specify which color components are to be changed by setting
DoRed,
DoGreen,
and/or
DoBlue
in the flags member of the
XColor
structure.
If the colormap is an installed map for its screen,
the changes are visible immediately.
XStoreColor
can generate
BadAccess,
BadColor,
and
BadValue
errors.
The
XStoreNamedColor
function looks up the named color with respect to the screen associated with
the colormap and stores the result in the specified colormap.
The pixel argument determines the entry in the colormap.
The flags argument determines which of the red, green, and blue components
are set.
You can set this member to the
bitwise inclusive OR of the bits
DoRed,
DoGreen,
and
DoBlue.
If the color name is not in the Host Portable Character Encoding,
the result is implementation-dependent.
Use of uppercase or lowercase does not matter.
If the specified pixel is not a valid index into the colormap, a
BadValue
error results.
If the specified pixel either is unallocated or is allocated read-only, a
BadAccess
error results.
XStoreNamedColor
can generate
BadAccess,
BadColor,
BadName,
and
BadValue
errors.
DIAGNOSTICS
BadAccess
A client attempted
to free a color map entry that it did not already allocate.
BadAccess
A client attempted
to store into a read-only color map entry.
BadColor
A value for a Colormap argument does not name a defined Colormap.
BadName
A font or color of the specified name does not exist.
BadValue
Some numeric value falls outside the range of values accepted by the request.
Unless a specific range is specified for an argument, the full range defined
by the argument's type is accepted. Any argument defined as a set of
alternatives can generate this error.
