1XCreateFontCursor(3) XLIB FUNCTIONS XCreateFontCursor(3)
2
6 XCreateFontCursor, XCreatePixmapCursor, XCreateGlyphCursor - create
7 cursors
8
10 #include <X11/cursorfont.h>
11 Cursor XCreateFontCursor(Display *display, unsigned int shape);
13 Cursor XCreatePixmapCursor(Display *display, Pixmap source, Pixmap
15 mask, XColor *foreground_color, XColor *background_color, un‐
16 signed int x, unsigned int y);
17 Cursor XCreateGlyphCursor(Display *display, Font source_font, Font
19 mask_font, unsigned int source_char, unsigned int mask_char,
20 XColor _Xconst *foreground_color, XColor _Xconst *back‐
21 ground_color);
22
24 background_color
25 Specifies the RGB values for the background of the source.
26 display Specifies the connection to the X server.
28 foreground_color
30 Specifies the RGB values for the foreground of the source.
31 mask Specifies the cursor's source bits to be displayed or None.
33 mask_char Specifies the glyph character for the mask.
35 mask_font Specifies the font for the mask glyph or None.
37 shape Specifies the shape of the cursor.
39 source Specifies the shape of the source cursor.
41 source_char
43 Specifies the character glyph for the source.
44 source_font
46 Specifies the font for the source glyph.
47 x
49 y Specify the x and y coordinates, which indicate the hotspot
50 relative to the source's origin.
51
53 X provides a set of standard cursor shapes in a special font named cur‐
54 sor. Applications are encouraged to use this interface for their cur‐
55 sors because the font can be customized for the individual display
56 type. The shape argument specifies which glyph of the standard fonts
57 to use.
58 The hotspot comes from the information stored in the cursor font. The
60 initial colors of a cursor are a black foreground and a white back‐
61 ground (see XRecolorCursor).
62 XCreateFontCursor can generate BadAlloc and BadValue errors.
64 The XCreatePixmapCursor function creates a cursor and returns the cur‐
66 sor ID associated with it. The foreground and background RGB values
67 must be specified using foreground_color and background_color, even if
68 the X server only has a StaticGray or GrayScale screen. The foreground
69 color is used for the pixels set to 1 in the source, and the background
70 color is used for the pixels set to 0. Both source and mask, if speci‐
71 fied, must have depth one (or a BadMatch error results) but can have
72 any root. The mask argument defines the shape of the cursor. The pix‐
73 els set to 1 in the mask define which source pixels are displayed, and
74 the pixels set to 0 define which pixels are ignored. If no mask is
75 given, all pixels of the source are displayed. The mask, if present,
76 must be the same size as the pixmap defined by the source argument, or
77 a BadMatch error results. The hotspot must be a point within the
78 source, or a BadMatch error results.
79 The components of the cursor can be transformed arbitrarily to meet
81 display limitations. The pixmaps can be freed immediately if no fur‐
82 ther explicit references to them are to be made. Subsequent drawing in
83 the source or mask pixmap has an undefined effect on the cursor. The X
84 server might or might not make a copy of the pixmap.
85 XCreatePixmapCursor can generate BadAlloc and BadPixmap errors.
87 The XCreateGlyphCursor function is similar to XCreatePixmapCursor ex‐
89 cept that the source and mask bitmaps are obtained from the specified
90 font glyphs. The source_char must be a defined glyph in source_font,
91 or a BadValue error results. If mask_font is given, mask_char must be
92 a defined glyph in mask_font, or a BadValue error results. The
93 mask_font and character are optional. The origins of the source_char
94 and mask_char (if defined) glyphs are positioned coincidently and de‐
95 fine the hotspot. The source_char and mask_char need not have the same
96 bounding box metrics, and there is no restriction on the placement of
97 the hotspot relative to the bounding boxes. If no mask_char is given,
98 all pixels of the source are displayed. You can free the fonts immedi‐
99 ately by calling XFreeFont if no further explicit references to them
100 are to be made.
101 For 2-byte matrix fonts, the 16-bit value should be formed with the
103 byte1 member in the most significant byte and the byte2 member in the
104 least significant byte.
105 XCreateGlyphCursor can generate BadAlloc, BadFont, and BadValue errors.
107
109 BadAlloc The server failed to allocate the requested resource or
110 server memory.
111 BadFont A value for a Font or GContext argument does not name a de‐
113 fined Font.
114 BadMatch Some argument or pair of arguments has the correct type and
116 range but fails to match in some other way required by the
117 request.
118 BadPixmap A value for a Pixmap argument does not name a defined Pixmap.
120 BadValue Some numeric value falls outside the range of values accepted
122 by the request. Unless a specific range is specified for an
123 argument, the full range defined by the argument's type is
124 accepted. Any argument defined as a set of alternatives can
125 generate this error.
126
128 XDefineCursor(3), XLoadFont(3), XRecolorCursor(3)
129 Xlib - C Language X Interface
130X Version 11 libX11 1.8.1 XCreateFontCursor(3)