Types: Cairo: A Vector Graphics Library

Types

Types — Generic data types

Functions

void	(*cairo_destroy_func_t) ()

Types and Values

typedef	cairo_bool_t
	cairo_user_data_key_t
	cairo_rectangle_int_t

Description

This section lists generic data types used in the cairo API.

Functions

cairo_destroy_func_t ()

void
(*cairo_destroy_func_t) (void *data);

cairo_destroy_func_t the type of function which is called when a data element is destroyed. It is passed the pointer to the data element and should free any memory and resources allocated for it.

Parameters

data

The data element being destroyed.

Since: 1.0

Types and Values

cairo_bool_t

typedef int cairo_bool_t;

cairo_bool_t is used for boolean values. Returns of type cairo_bool_t will always be either 0 or 1, but testing against these values explicitly is not encouraged; just use the value as a boolean condition.

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if (cairo_in_stroke (cr, x, y)) {
    /* do something */
}

Since: 1.0

cairo_user_data_key_t

typedef struct {
    int unused;
} cairo_user_data_key_t;

cairo_user_data_key_t is used for attaching user data to cairo data structures. The actual contents of the struct is never used, and there is no need to initialize the object; only the unique address of a cairo_data_key_t object is used. Typically, you would just use the address of a static cairo_data_key_t object.

Members

int unused;

not used; ignore.

Since: 1.0

cairo_rectangle_int_t

typedef struct {
    int x, y;
    int width, height;
} cairo_rectangle_int_t;

A data structure for holding a rectangle with integer coordinates.

Members

int `x`;	X coordinate of the left side of the rectangle
int `y`;	Y coordinate of the top side of the rectangle
int `width`;	width of the rectangle
int `height`;	height of the rectangle

Since: 1.10