NAME
ImageByteOrder, BitmapBitOrder, BitmapPad, BitmapUnit, DisplayHeight,
DisplayHeightMM, DisplayWidth, DisplayWidthMM, XListPixmapFormats,
XPixmapFormatValues - image format functions and macros
SYNTAX
XPixmapFormatValues
*XListPixmapFormats(Display * display, int *count_return);
int
ImageByteOrder(Display * display);
int
BitmapBitOrder(Display * display);
int
BitmapPad(Display * display);
int
BitmapUnit(Display * display);
int
DisplayHeight(Display * display, int screen_number);
int
DisplayHeightMM(Display * display, int screen_number);
int
DisplayWidth(Display * display, int screen_number);
int
DisplayWidthMM(Display * display, int screen_number);
ARGUMENTS
- display
- Specifies the connection to the X server.
- count_return
- Returns the number of pixmap formats that are supported by
the display.
- screen_number
- Specifies the appropriate screen number on the host
server.
DESCRIPTION
The
XListPixmapFormats function returns an array of
XPixmapFormatValues structures that describe the types of Z format
images supported by the specified display. If insufficient memory is
available,
XListPixmapFormats returns NULL. To free the allocated
storage for the
XPixmapFormatValues structures, use
XFree.
The
ImageByteOrder macro specifies the required byte order for images for
each scanline unit in XY format (bitmap) or for each pixel value in Z format.
The
BitmapBitOrder macro returns
LSBFirst or
MSBFirst to
indicate whether the leftmost bit in the bitmap as displayed on the screen is
the least or most significant bit in the unit.
The
BitmapPad macro returns the number of bits that each scanline must be
padded.
The
BitmapUnit macro returns the size of a bitmap's scanline unit in
bits.
The
DisplayHeight macro returns the height of the specified screen in
pixels.
The
DisplayHeightMM macro returns the height of the specified screen in
millimeters.
The
DisplayWidth macro returns the width of the screen in pixels.
The
DisplayWidthMM macro returns the width of the specified screen in
millimeters.
STRUCTURES
The
XPixmapFormatValues structure provides an interface to the pixmap
format information that is returned at the time of a connection setup. It
contains:
typedef struct {
int depth;
int bits_per_pixel;
int scanline_pad;
} XPixmapFormatValues;
SEE ALSO
AllPlanes(3), BlackPixelOfScreen(3), IsCursorKey(3), XFree(3)
Xlib - C Language X Interface