man XGetVisualInfo (Fonctions bibliothèques) - obtain visual information and visual structure
NAME
XGetVisualInfo, XMatchVisualInfo, XVisualIDFromVisual, XVisualInfo - obtain visual information and visual structure
SYNTAX
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} / 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;