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