XDrawRectangle man page on QNX

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XDrawRectangle(3)		XLIB FUNCTIONS		     XDrawRectangle(3)

       XDrawRectangle, XDrawRectangles, XRectangle - draw rectangles and rec‐
       tangles structure

       int XDrawRectangle(Display *display, Drawable d, GC gc, int x, int y,
	      unsigned int width, unsigned int height);

       int XDrawRectangles(Display *display, Drawable d, GC gc, XRectangle
	      rectangles[], int nrectangles);

       d	 Specifies the drawable.

       display	 Specifies the connection to the X server.

       gc	 Specifies the GC.

		 Specifies the number of rectangles in the array.

		 Specifies an array of rectangles.

       height	 Specify the width and height, which specify the dimensions of
		 the rectangle.

       y	 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 pro‐
       tocol 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 Win‐
		 dow or Pixmap.

       BadGC	 A value for a GContext argument does not name a defined GCon‐

       BadMatch	 An InputOnly window is used as a Drawable.

       BadMatch	 Some argument or pair of arguments has the correct type and
		 range but fails to match in some other way required by the

       XDrawArc(3), XDrawLine(3), XDrawPoint(3)
       Xlib - C Language X Interface

X Version 11			 libX11 1.3.5		     XDrawRectangle(3)
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