XGetVisualInfo
NAME
XGetVisualInfo, XMatchVisualInfo, XVisualIDFromVisual, XVisualInfo - obtain visual information and visual structure
SYNTAX
XVisualInfo *XGetVisualInfo\^(\^Display *display\^, long
vinfo_mask\^, XVisualInfo *vinfo_template\^, int
*nitems_return\^);
Status XMatchVisualInfo\^(\^Display *display\^, int screen\^, int
depth\^, int class\^, XVisualInfo *vinfo_return\^);
VisualID XVisualIDFromVisual\^(\^Visual *\^visual\^);
ARGUMENTS
class
Specifies the class of the screen.
depth
Specifies the depth of the screen.
display
Specifies the connection to the X server.
nitems_return
Returns the number of matching visual structures.
screen
Specifies the screen.
visual
Specifies the visual type.
vinfo_mask
Specifies the visual mask value.
vinfo_return
Returns the matched visual information.
vinfo_template
Specifies the visual attributes that are to be used in matching the visual
structures.
DESCRIPTION
The
function returns a list of visual structures that have attributes
equal to the attributes specified by vinfo_template.
If no visual structures match the template using the specified vinfo_mask,
returns a NULL.
To free the data returned by this function, use
The
function returns the visual information for a visual that matches the specified
depth and class for a screen.
Because multiple visuals that match the specified depth and class can exist,
the exact visual chosen is undefined.
If a visual is found,
returns nonzero and the information on the visual to vinfo_return.
Otherwise, when a visual is not found,
returns zero.
The
function returns the visual ID for the specified visual type.
STRUCTURES
The
structure contains:
/ Visual information mask bits */
lw(.5i) lw(2.5i) lw(.8i).
T{
#define
T} T{
T} T{
0x0
T}
T{
#define
T} T{
T} T{
0x1
T}
T{
#define
T} T{
T} T{
0x2
T}
T{
#define
T} T{
T} T{
0x4
T}
T{
#define
T} T{
T} T{
0x8
T}
T{
#define
T} T{
T} T{
0x10
T}
T{
#define
T} T{
T} T{
0x20
T}
T{
#define
T} T{
T} T{
0x40
T}
T{
#define
T} T{
T} T{
0x80
T}
T{
#define
T} T{
T} T{
0x100
T}
T{
#define
T} T{
T} T{
0x1FF
T}
N XVisualInfo @DEF@
/ Values */
typedef struct {
Visual *visual;
VisualID visualid;
int screen;
unsigned int depth;
int class;
unsigned long red_mask;
unsigned long green_mask;
unsigned long blue_mask;
int colormap_size;
int bits_per_rgb;
} XVisualInfo;
SEE ALSO
XFree(3X11)
