Name

Syntax

Status XMatchVisualInfo(display, screen, depth, class, vinfo_return)
Display *display;

int screen;

int depth;

int class;

XVisualInfo *vinfo_return;

VisualID XVisualIDFromVisual(visual)
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 XMatchVisualInfo 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, XMatchVisualInfo returns nonzero and the information on the visual to vinfo_return. Otherwise, when a visual is not found, XMatchVisualInfo returns zero.

The XVisualIDFromVisual function returns the visual ID for the specified visual type.

Structures

/* Visual information mask bits */ VisualNoMaskVisualIDMaskVisualScreenMaskVisualDepthMaskVisualClassMaskVisualRedMaskMaskVisualGreenMaskMaskVisualBlueMaskMaskVisualColormapSizeMaskVisualBitsPerRGBMaskVisualAllMask

#define

T}    T{

0x0

T}

#define

T}    T{

0x1

T}

#define

T}    T{

0x2

T}

#define

T}    T{

0x4

T}

#define

T}    T{

0x8

T}

#define

T}    T{

0x10

T}

#define

T}    T{

0x20

T}

#define

T}    T{

0x40

T}

#define

T}    T{

0x80

T}

#define

T}    T{

0x100

T}

#define

T}    T{

0x1FF

T}

/* 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

Table of Contents

• Name
• Syntax
• Arguments
• Description
• Structures
• See Also