NAME
XDrawPoint, XDrawPoints, XPoint - draw points and points structure
SYNTAX
int XDrawPoint(Display *_d_i_s_p_l_a_y, Drawable _d, GC
_g_c, int _x, int _y);
int XDrawPoints(Display *_d_i_s_p_l_a_y, Drawable _d, GC
_g_c, XPoint *_p_o_i_n_t_s, int _n_p_o_i_n_t_s, int _m_o_d_e);
ARGUMENTS
-
_d
Specifies the drawable.
-
-
_d_i_s_p_l_a_y
Specifies the connection to the X server.
-
-
_g_c
Specifies the GC.
-
-
_m_o_d_e
Specifies the coordinate mode.
-
You can pass
_C_o_o_r_d_M_o_d_e_O_r_i_g_i_n
or
_C_o_o_r_d_M_o_d_e_P_r_e_v_i_o_u_s.
-
_n_p_o_i_n_t_s
Specifies the number of points in the array.
-
-
_p_o_i_n_t_s
Specifies an array of points.
-
-
_x
-
-
_y
Specify the x and y coordinates where you want the point drawn.
-
DESCRIPTION
The
_X_D_r_a_w_P_o_i_n_t
function uses the foreground pixel and function components of the
GC to draw a single point into the specified drawable;
_X_D_r_a_w_P_o_i_n_t_s
draws multiple points this way.
_C_o_o_r_d_M_o_d_e_O_r_i_g_i_n
treats all coordinates as relative to the origin,
and
_C_o_o_r_d_M_o_d_e_P_r_e_v_i_o_u_s
treats all coordinates after the first as relative to the previous point.
_X_D_r_a_w_P_o_i_n_t_s
draws the points in the order listed in the array.
Both functions use these GC components: function, plane-mask,
foreground, subwindow-mode, clip-x-origin, clip-y-origin, and clip-mask.
_X_D_r_a_w_P_o_i_n_t
can generate
_B_a_d_D_r_a_w_a_b_l_e,
_B_a_d_G_C,
and
_B_a_d_M_a_t_c_h
errors.
_X_D_r_a_w_P_o_i_n_t_s
can generate
_B_a_d_D_r_a_w_a_b_l_e,
_B_a_d_G_C,
_B_a_d_M_a_t_c_h,
and
_B_a_d_V_a_l_u_e
errors.
STRUCTURES
The
_X_P_o_i_n_t
structure contains:
typedef struct {
short x, y;
} XPoint;
All x and y members are signed integers.
The width and height members are 16-bit unsigned integers.
You should be careful not to generate coordinates and sizes
out of the 16-bit ranges, because the protocol only has 16-bit fields
for these values.
DIAGNOSTICS
-
_B_a_d_D_r_a_w_a_b_l_e
-
A value for a Drawable argument does not name a defined Window or Pixmap.
-
_B_a_d_G_C
-
A value for a GContext argument does not name a defined GContext.
-
_B_a_d_M_a_t_c_h
-
An
_I_n_p_u_t_O_n_l_y
window is used as a Drawable.
-
_B_a_d_M_a_t_c_h
-
Some argument or pair of arguments has the correct type and range but fails
to match in some other way required by the request.
-
_B_a_d_V_a_l_u_e
-
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.
SEE ALSO
XDrawArc(3X11),
XDrawLine(3X11),
XDrawRectangle(3X11)
_X_l_i_b _- _C _L_a_n_g_u_a_g_e _X _I_n_t_e_r_f_a_c_e