1XReadBitmapFile(3)              XLIB FUNCTIONS              XReadBitmapFile(3)
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NAME

6       XReadBitmapFile, XReadBitmapFileData, XWriteBitmapFile, XCre‐
7       atePixmapFromBitmapData, XCreateBitmapFromData - manipulate bitmaps
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SYNTAX

10       int XReadBitmapFile(Display *display, Drawable d, char *filename,
11              unsigned int *width_return, unsigned int *height_return, Pixmap
12              *bitmap_return, int *x_hot_return, int *y_hot_return);
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14       int XReadBitmapFileData(char *filename, unsigned int *width_return,
15              unsigned int *height_return, unsigned char *data_return, int
16              *x_hot_return, int *y_hot_return);
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18       int XWriteBitmapFile(Display *display, char *filename, Pixmap bitmap,
19              unsigned int width, unsigned int height, int x_hot, int y_hot);
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21       Pixmap XCreatePixmapFromBitmapData(Display *display, Drawable d, char
22              *data, unsigned int width, unsigned int height, unsigned long
23              fg, unsigned long bg, unsigned int depth);
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25       Pixmap XCreateBitmapFromData(Display *display, Drawable d, char *data,
26              unsigned int width, unsigned int height);
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ARGUMENTS

29       bitmap    Specifies the bitmap.
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31       bitmap_return
32                 Returns the bitmap that is created.
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34       d         Specifies the drawable that indicates the screen.
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36       data      Specifies the data in bitmap format.
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38       data      Specifies the location of the bitmap data.
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40       data_return
41                 Returns the bitmap data.
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43       depth     Specifies the depth of the pixmap.
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45       display   Specifies the connection to the X server.
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47       fg
48       bg        Specify the foreground and background pixel values to use.
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50       filename  Specifies the file name to use.  The format of the file name
51                 is operating-system dependent.
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53       width
54       height    Specify the width and height.
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56       width_return
57       height_return
58                 Return the width and height values of the read in bitmap
59                 file.
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61       x_hot
62       y_hot     Specify where to place the hotspot coordinates (or -1,-1 if
63                 none are present) in the file.
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65       x_hot_return
66       y_hot_return
67                 Return the hotspot coordinates.
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DESCRIPTION

70       The XReadBitmapFile function reads in a file containing a bitmap.  The
71       file is parsed in the encoding of the current locale.  The ability to
72       read other than the standard format is implementation-dependent.  If
73       the file cannot be opened, XReadBitmapFile returns BitmapOpenFailed.
74       If the file can be opened but does not contain valid bitmap data, it
75       returns BitmapFileInvalid.  If insufficient working storage is allo‐
76       cated, it returns BitmapNoMemory.  If the file is readable and valid,
77       it returns BitmapSuccess.
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79       XReadBitmapFile returns the bitmap's height and width, as read from the
80       file, to width_return and height_return.  It then creates a pixmap of
81       the appropriate size, reads the bitmap data from the file into the
82       pixmap, and assigns the pixmap to the caller's variable bitmap.  The
83       caller must free the bitmap using XFreePixmap when finished.  If
84       name_x_hot and name_y_hot exist, XReadBitmapFile returns them to
85       x_hot_return and y_hot_return; otherwise, it returns -1,-1.
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87       XReadBitmapFile can generate BadAlloc and BadDrawable errors.
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89       The XReadBitmapFileData function reads in a file containing a bitmap,
90       in the same manner as XReadBitmapFile, but returns the data directly
91       rather than creating a pixmap in the server.  The bitmap data is
92       returned in data_return; the client must free this storage when fin‐
93       ished with it by calling XFree.  The status and other return values are
94       the same as for XReadBitmapFile.
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96       The XWriteBitmapFile function writes a bitmap out to a file in the X
97       Version 11 format.  The name used in the output file is derived from
98       the file name by deleting the directory prefix.  The file is written in
99       the encoding of the current locale.  If the file cannot be opened for
100       writing, it returns BitmapOpenFailed.  If insufficient memory is allo‐
101       cated, XWriteBitmapFile returns BitmapNoMemory; otherwise, on no error,
102       it returns BitmapSuccess.  If x_hot and y_hot are not -1, -1,
103       XWriteBitmapFile writes them out as the hotspot coordinates for the
104       bitmap.
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106       XWriteBitmapFile can generate BadDrawable and BadMatch errors.
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108       The XCreatePixmapFromBitmapData function creates a pixmap of the given
109       depth and then does a bitmap-format XPutImage of the data into it.  The
110       depth must be supported by the screen of the specified drawable, or a
111       BadMatch error results.
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113       XCreatePixmapFromBitmapData can generate BadAlloc and BadMatch errors.
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115       The XCreateBitmapFromData function allows you to include in your C pro‐
116       gram (using #include) a bitmap file that was written out by
117       XWriteBitmapFile (X version 11 format only) without reading in the bit‐
118       map file.  The following example creates a gray bitmap:
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120       #include "gray.bitmap"
121       Pixmap bitmap;
122       bitmap = XCreateBitmapFromData(display, window, gray_bits, gray_width, gray_height);
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124       If insufficient working storage was allocated, XCreateBitmapFromData
125       returns None.  It is your responsibility to free the bitmap using
126       XFreePixmap when finished.
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128       XCreateBitmapFromData can generate a BadAlloc error.
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DIAGNOSTICS

131       BadAlloc  The server failed to allocate the requested resource or
132                 server memory.
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134       BadDrawable
135                 A value for a Drawable argument does not name a defined Win‐
136                 dow or Pixmap.
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138       BadMatch  An InputOnly window is used as a Drawable.
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SEE ALSO

141       XCreatePixmap(3), XPutImage(3)
142       Xlib - C Language X Interface
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146X Version 11                     libX11 1.6.4               XReadBitmapFile(3)
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