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