Skip site navigation (1)Skip section navigation (2)

FreeBSD Manual Pages


home | help
XReadBitmapFile(3)		XLIB FUNCTIONS		    XReadBitmapFile(3)

       XReadBitmapFile,	XReadBitmapFileData, XWriteBitmapFile, XCre-
       atePixmapFromBitmapData,	XCreateBitmapFromData -	manipulate bitmaps

       int XReadBitmapFile(Display *display, Drawable d, char *filename, un-
	      signed int *width_return,	unsigned int *height_return, Pixmap
	      *bitmap_return, int *x_hot_return, int *y_hot_return);

       int XReadBitmapFileData(char *filename, unsigned	int *width_return, un-
	      signed int *height_return, unsigned char *data_return, int
	      *x_hot_return, int *y_hot_return);

       int XWriteBitmapFile(Display *display, char *filename, Pixmap bitmap,
	      unsigned int width, unsigned int height, int x_hot, int y_hot);

       Pixmap XCreatePixmapFromBitmapData(Display *display, Drawable d,	char
	      *data, unsigned int width, unsigned int height, unsigned long
	      fg, unsigned long	bg, unsigned int depth);

       Pixmap XCreateBitmapFromData(Display *display, Drawable d, char *data,
	      unsigned int width, unsigned int height);

       bitmap	 Specifies the bitmap.

		 Returns the bitmap that is created.

       d	 Specifies the drawable	that indicates the screen.

       data	 Specifies the data in bitmap format.

       data	 Specifies the location	of the bitmap data.

		 Returns the bitmap data.

       depth	 Specifies the depth of	the pixmap.

       display	 Specifies the connection to the X server.

       bg	 Specify the foreground	and background pixel values to use.

       filename	 Specifies the file name to use.  The format of	the file name
		 is operating-system dependent.

       height	 Specify the width and height.

		 Return	the width and height values of the read	in bitmap

       y_hot	 Specify where to place	the hotspot coordinates	(or -1,-1 if
		 none are present) in the file.

		 Return	the hotspot coordinates.

       The XReadBitmapFile function reads in a file containing a bitmap.  The
       file is parsed in the encoding of the current locale.  The ability to
       read other than the standard format is implementation-dependent.	 If
       the file	cannot be opened, XReadBitmapFile returns BitmapOpenFailed.
       If the file can be opened but does not contain valid bitmap data, it
       returns BitmapFileInvalid.  If insufficient working storage is allo-
       cated, it returns BitmapNoMemory.  If the file is readable and valid,
       it returns BitmapSuccess.

       XReadBitmapFile returns the bitmap's height and width, as read from the
       file, to	width_return and height_return.	 It then creates a pixmap of
       the appropriate size, reads the bitmap data from	the file into the
       pixmap, and assigns the pixmap to the caller's variable bitmap.	The
       caller must free	the bitmap using XFreePixmap when finished.  If
       name_x_hot and name_y_hot exist,	XReadBitmapFile	returns	them to
       x_hot_return and	y_hot_return; otherwise, it returns -1,-1.

       XReadBitmapFile can generate BadAlloc and BadDrawable errors.

       The XReadBitmapFileData function	reads in a file	containing a bitmap,
       in the same manner as XReadBitmapFile, but returns the data directly
       rather than creating a pixmap in	the server.  The bitmap	data is	re-
       turned in data_return; the client must free this	storage	when finished
       with it by calling XFree.  The status and other return values are the
       same as for XReadBitmapFile.

       The XWriteBitmapFile function writes a bitmap out to a file in the X
       Version 11 format.  The name used in the	output file is derived from
       the file	name by	deleting the directory prefix.	The file is written in
       the encoding of the current locale.  If the file	cannot be opened for
       writing,	it returns BitmapOpenFailed.  If insufficient memory is	allo-
       cated, XWriteBitmapFile returns BitmapNoMemory; otherwise, on no	error,
       it returns BitmapSuccess.  If x_hot and y_hot are not -1, -1,
       XWriteBitmapFile	writes them out	as the hotspot coordinates for the

       XWriteBitmapFile	can generate BadDrawable and BadMatch errors.

       The XCreatePixmapFromBitmapData function	creates	a pixmap of the	given
       depth and then does a bitmap-format XPutImage of	the data into it.  The
       depth must be supported by the screen of	the specified drawable,	or a
       BadMatch	error results.

       XCreatePixmapFromBitmapData can generate	BadAlloc and BadMatch errors.

       The XCreateBitmapFromData function allows you to	include	in your	C pro-
       gram (using #include) a bitmap file that	was written out	by
       XWriteBitmapFile	(X version 11 format only) without reading in the bit-
       map file.  The following	example	creates	a gray bitmap:

       #include	"gray.bitmap"
       Pixmap bitmap;
       bitmap =	XCreateBitmapFromData(display, window, gray_bits, gray_width, gray_height);

       If insufficient working storage was allocated, XCreateBitmapFromData
       returns None.  It is your responsibility	to free	the bitmap using
       XFreePixmap when	finished.

       XCreateBitmapFromData can generate a BadAlloc error.

       BadAlloc	 The server failed to allocate the requested resource or
		 server	memory.

		 A value for a Drawable	argument does not name a defined Win-
		 dow or	Pixmap.

       BadMatch	 An InputOnly window is	used as	a Drawable.

       XCreatePixmap(3), XPutImage(3)
       Xlib - C	Language X Interface

X Version 11			 libX11	1.6.5		    XReadBitmapFile(3)


Want to link to this manual page? Use this URL:

home | help