XDrawRectangle(3X11) XLIB FUNCTIONS XDrawRectangle(3X11)NAME
XDrawRectangle, XDrawRectangles, XRectangle - draw rectan-
gles and rectangles structure
SYNTAX
XDrawRectangle(display, d, gc, x, y, width, height)
Display *display;
Drawable d;
GC gc;
int x, y;
unsigned int width, height;
XDrawRectangles(display, d, gc, rectangles, nrectangles)
Display *display;
Drawable d;
GC gc;
XRectangle rectangles[];
int nrectangles;
ARGUMENTS
d Specifies the drawable.
display Specifies the connection to the X server.
gc Specifies the GC.
nrectangles
Specifies the number of rectangles in the array.
rectangles
Specifies an array of rectangles.
width
height Specify the width and height, which specify the
dimensions of the rectangle.
x
y Specify the x and y coordinates, which specify
the upper-left corner of the rectangle.
DESCRIPTION
The XDrawRectangle and XDrawRectangles functions draw the
outlines of the specified rectangle or rectangles as if a
five-point PolyLine protocol request were specified for
each rectangle:
[x,y] [x+width,y] [x+width,y+height] [x,y+height]
[x,y]
For the specified rectangle or rectangles, these functions
do not draw a pixel more than once. XDrawRectangles draws
the rectangles in the order listed in the array. If rect-
angles intersect, the intersecting pixels are drawn multi-
ple times.
X Version 11 Release 6.4 1
XDrawRectangle(3X11) XLIB FUNCTIONS XDrawRectangle(3X11)
Both functions use these GC components: function, plane-
mask, line-width, line-style, cap-style, join-style, fill-
style, subwindow-mode, clip-x-origin, clip-y-origin, and
clip-mask. They also use these GC mode-dependent compo-
nents: foreground, background, tile, stipple, tile-stip-
ple-x-origin, tile-stipple-y-origin, dash-offset, and
dash-list.
XDrawRectangle and XDrawRectangles can generate
BadDrawable, BadGC, and BadMatch errors.
STRUCTURES
The XRectangle structure contains:
typedef struct {
short x, y;
unsigned short width, height;
} XRectangle;
All x and y members are signed integers. The width and
height members are 16-bit unsigned integers. You should
be careful not to generate coordinates and sizes out of
the 16-bit ranges, because the protocol only has 16-bit
fields for these values.
DIAGNOSTICS
BadDrawable
A value for a Drawable argument does not name a
defined Window or Pixmap.
BadGC A value for a GContext argument does not name a
defined GContext.
BadMatch An InputOnly window is used as a Drawable.
BadMatch Some argument or pair of arguments has the cor-
rect type and range but fails to match in some
other way required by the request.
SEE ALSOXDrawArc(3X11), XDrawLine(3X11), XDrawPoint(3X11)
Xlib - C Language X Interface
X Version 11 Release 6.4 2
