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XDrawRectangle, XDrawRectangles, XRectangle - draw rectangles and rectangles structure
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;
Specifies the drawable.
Specifies the connection to the X server.
Specifies the GC.
Specifies the number of rectangles in the array.
Specifies an array of rectangles.
Specify the width and height, which specify the dimensions
of the rectangle.
Specify the x and y coordinates, which specify the upper-left
corner of the rectangle.
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 rectangles intersect, the intersecting pixels are drawn multiple times.
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 components: foreground, background, tile, stipple, tile-stipple-x-origin, tile-stipple-y-origin, dash-offset, and dash-list.
XDrawRectangle
and
XDrawRectangles
can generate
BadDrawable,
BadGC, and
BadMatch
errors.
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.
A value for a Drawable argument does not name a defined Window
or Pixmap.
A value for a GContext argument does not name a defined GContext.
An
InputOnly
window is used as a Drawable.
Some argument or pair of arguments has the correct type and
range but fails to match in some other way required by the request.
XDrawArc(3X11), XDrawLine(3X11), XDrawPoint(3X11)
Xlib -- C Language X Interface