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- XDrawText(3X11) XLIB FUNCTIONS XDrawText(3X11)
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- NNAAMMEE
- XDrawText, XDrawText16, XTextItem, XTextItem16 - draw
- polytext text and text drawing structures
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- SSYYNNTTAAXX
- XDrawText(_d_i_s_p_l_a_y, _d, _g_c, _x, _y, _i_t_e_m_s, _n_i_t_e_m_s)
- Display *_d_i_s_p_l_a_y;
- Drawable _d;
- GC _g_c;
- int _x, _y;
- XTextItem *_i_t_e_m_s;
- int _n_i_t_e_m_s;
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- XDrawText16(_d_i_s_p_l_a_y, _d, _g_c, _x, _y, _i_t_e_m_s, _n_i_t_e_m_s)
- Display *_d_i_s_p_l_a_y;
- Drawable _d;
- GC _g_c;
- int _x, _y;
- XTextItem16 *_i_t_e_m_s;
- int _n_i_t_e_m_s;
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- AARRGGUUMMEENNTTSS
- _d Specifies the drawable.
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- _d_i_s_p_l_a_y Specifies the connection to the X server.
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- _g_c Specifies the GC.
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- _i_t_e_m_s Specifies an array of text items.
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- _n_i_t_e_m_s Specifies the number of text items in the array.
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- _x
- _y Specify the x and y coordinates, which are rela-
- tive to the origin of the specified drawable and
- define the origin of the first character.
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- DDEESSCCRRIIPPTTIIOONN
- The _X_D_r_a_w_T_e_x_t_1_6 function is similar to _X_D_r_a_w_T_e_x_t except
- that it uses 2-byte or 16-bit characters. Both functions
- allow complex spacing and font shifts between counted
- strings.
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- Each text item is processed in turn. A font member other
- than _N_o_n_e in an item causes the font to be stored in the
- GC and used for subsequent text. A text element delta
- specifies an additional change in the position along the x
- axis before the string is drawn. The delta is always
- added to the character origin and is not dependent on any
- characteristics of the font. Each character image, as
- defined by the font in the GC, is treated as an additional
- mask for a fill operation on the drawable. The drawable
- is modified only where the font character has a bit set to
- 1. If a text item generates a _B_a_d_F_o_n_t error, the previous
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- X Version 11 Release 6.1 1
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- XDrawText(3X11) XLIB FUNCTIONS XDrawText(3X11)
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- text items may have been drawn.
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- For fonts defined with linear indexing rather than 2-byte
- matrix indexing, each _X_C_h_a_r_2_b structure is interpreted as
- a 16-bit number with byte1 as the most significant byte.
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- Both functions use these GC components: function, plane-
- mask, fill-style, font, subwindow-mode, clip-x-origin,
- clip-y-origin, and clip-mask. They also use these GC
- mode-dependent components: foreground, background, tile,
- stipple, tile-stipple-x-origin, and tile-stipple-y-origin.
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- _X_D_r_a_w_T_e_x_t and _X_D_r_a_w_T_e_x_t_1_6 can generate _B_a_d_D_r_a_w_a_b_l_e,
- _B_a_d_F_o_n_t, _B_a_d_G_C, and _B_a_d_M_a_t_c_h errors.
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- SSTTRRUUCCTTUURREESS
- The _X_T_e_x_t_I_t_e_m and _X_T_e_x_t_I_t_e_m_1_6 structures contain:
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- typedef struct {
- char *chars; /* pointer to string */
- int nchars; /* number of characters */
- int delta; /* delta between strings */
- Font font; /* Font to print it in, None don't change */
- } XTextItem;
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- typedef struct {
- XChar2b *chars; /* pointer to two-byte characters */
- int nchars; /* number of characters */
- int delta; /* delta between strings */
- Font font; /* font to print it in, None don't change */
- } XTextItem16;
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- If the font member is not _N_o_n_e, the font is changed before
- printing and also is stored in the GC. If an error was
- generated during text drawing, the previous items may have
- been drawn. The baseline of the characters are drawn
- starting at the x and y coordinates that you pass in the
- text drawing functions.
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- For example, consider the background rectangle drawn by
- _X_D_r_a_w_I_m_a_g_e_S_t_r_i_n_g. If you want the upper-left corner of
- the background rectangle to be at pixel coordinate (x,y),
- pass the (x,y + ascent) as the baseline origin coordinates
- to the text functions. The ascent is the font ascent, as
- given in the _X_F_o_n_t_S_t_r_u_c_t structure. If you want the
- lower-left corner of the background rectangle to be at
- pixel coordinate (x,y), pass the (x,y - descent + 1) as
- the baseline origin coordinates to the text functions.
- The descent is the font descent, as given in the
- _X_F_o_n_t_S_t_r_u_c_t structure.
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- DDIIAAGGNNOOSSTTIICCSS
- _B_a_d_D_r_a_w_a_b_l_e
- A value for a Drawable argument does not name a
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- X Version 11 Release 6.1 2
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- XDrawText(3X11) XLIB FUNCTIONS XDrawText(3X11)
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- defined Window or Pixmap.
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- _B_a_d_F_o_n_t A value for a Font or GContext argument does not
- name a defined Font.
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- _B_a_d_G_C A value for a GContext argument does not name a
- defined GContext.
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- _B_a_d_M_a_t_c_h An _I_n_p_u_t_O_n_l_y window is used as a Drawable.
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- SSEEEE AALLSSOO
- XDrawImageString(3X11), XDrawString(3X11), XLoadFont(3X11)
- _X_l_i_b _- _C _L_a_n_g_u_a_g_e _X _I_n_t_e_r_f_a_c_e
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- X Version 11 Release 6.1 3
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