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	   (type timestamp time)))

(defun input-focus (display)
  (declare (type display display)
	   (clx-values focus revert-to)))

(defun query-keymap (display)
  (declare (type display display)
	   (clx-values (bit-vector 256))))

(defun open-font (display name)
  ;; Font objects may be cached and reference counted locally within the display
  ;; object.  This function might not execute a with-display if the font is cached.
  ;; The protocol QueryFont request happens on-demand under the covers.
  (declare (type display display)
	   (type stringable name)
	   (clx-values font)))

;; We probably want a per-font bit to indicate whether caching on
;; text-extents/width calls is desirable.  But what to name it?

(defun discard-font-info (font)
  ;; Discards any state that can be re-obtained with QueryFont.  This is simply
  ;; a performance hint for memory-limited systems.
  (declare (type font font)))

;; This can be signalled anywhere a pseudo font access fails.

(define-condition invalid-font error
  font)

;; Note: font-font-info removed.

(defun font-name (font)
  ;; Returns nil for a pseudo font returned by gcontext-font.
  (declare (type font font)
	   (clx-values (or null string))))

(defun font-direction (font)
  (declare (type font font)
	   (clx-values draw-direction)))

(defun font-min-char (font)
  (declare (type font font)
	   (clx-values card16)))

(defun font-max-char (font)
  (declare (type font font)
	   (clx-values card16)))

(defun font-min-byte1 (font)
  (declare (type font font)
	   (clx-values card8)))

(defun font-max-byte1 (font)
  (declare (type font font)
	   (clx-values card8)))

(defun font-min-byte2 (font)
  (declare (type font font)
	   (clx-values card8)))

(defun font-max-byte2 (font)
  (declare (type font font)
	   (clx-values card8)))

(defun font-all-chars-exist-p (font)
  (declare (type font font)
	   (clx-values boolean)))

(defun font-default-char (font)
  (declare (type font font)
	   (clx-values card16)))

(defun font-ascent (font)
  (declare (type font font)
	   (clx-values int16)))

(defun font-descent (font)
  (declare (type font font)
	   (clx-values int16)))

;; The list contains alternating keywords and int32s.

(deftype font-props () 'list)

(defun font-properties (font)
  (declare (type font font)
	   (clx-values font-props)))

(defun font-property (font name)
  (declare (type font font)
	   (type keyword name)
	   (clx-values (or null int32))))

;; For each of left-bearing, right-bearing, width, ascent, descent, attributes:

(defun char-<metric> (font index)
  ;; Note: I have tentatively chosen to return nil for an out-of-bounds index
  ;; (or an in-bounds index on a pseudo font), although returning zero or
  ;; signalling might be better.
  (declare (type font font)
	   (type card16 index)
	   (clx-values (or null int16))))

(defun max-char-<metric> (font)
  ;; Note: I have tentatively chosen separate accessors over allowing :min and
  ;; :max as an index above.
  (declare (type font font)
	   (clx-values int16)))

(defun min-char-<metric> (font)
  (declare (type font font)
	   (clx-values int16)))

;; Note: char16-<metric> accessors could be defined to accept two-byte indexes.

(defun close-font (font)
  ;; This might not generate a protocol request if the font is reference
  ;; counted locally or if it is a pseudo font.
  (declare (type font font)))

(defun list-font-names (display pattern &key (max-fonts 65535) (result-type 'list))
  (declare (type display display)
	   (type string pattern)
	   (type card16 max-fonts)
	   (type type result-type)
	   (clx-values (clx-sequence string))))

(defun list-fonts (display pattern &key (max-fonts 65535) (result-type 'list))
  ;; Returns "pseudo" fonts that contain basic font metrics and properties, but
  ;; no per-character metrics and no resource-ids.  These pseudo fonts will be
  ;; converted (internally) to real fonts dynamically as needed, by issuing an
  ;; OpenFont request.  However, the OpenFont might fail, in which case the
  ;; invalid-font error can arise.
  (declare (type display display)
	   (type string pattern)
	   (type card16 max-fonts)
	   (type type result-type)
	   (clx-values (clx-sequence font))))

(defun font-path (display &key (result-type 'list))
  (declare (type display display)
	   (type type result-type)
	   (clx-values (clx-sequence (or string pathname)))))

(defsetf font-path (display) (paths)
  (declare (type display display)
	   (type (clx-sequence (or string pathname)) paths)))

(defun create-pixmap (&key width height depth drawable)
  (declare (type card16 width height)
	   (type card8 depth)
	   (type drawable drawable)
	   (clx-values pixmap)))

(defun free-pixmap (pixmap)
  (declare (type pixmap pixmap)))

(defun create-gcontext (&key drawable function plane-mask foreground background
			     line-width line-style cap-style join-style fill-style fill-rule
			     arc-mode tile stipple ts-x ts-y font subwindow-mode
			     exposures clip-x clip-y clip-mask clip-ordering
			     dash-offset dashes
			     (cache-p t))
  ;; Only non-nil components are passed on in the request, but for effective caching
  ;; assumptions have to be made about what the actual protocol defaults are.  For
  ;; all gcontext components, a value of nil causes the default gcontext value to be
  ;; used.  For clip-mask, this implies that an empty rect-seq cannot be represented
  ;; as a list.  Note:  use of stringable as font will cause an implicit open-font.
  ;; Note:  papers over protocol SetClipRectangles and SetDashes special cases.  If
  ;; cache-p is true, then gcontext state is cached locally, and changing a gcontext
  ;; component will have no effect unless the new value differs from the cached
  ;; value.  Component changes (setfs and with-gcontext) are always deferred
  ;; regardless of the cache mode, and sent over the protocol only when required by a
  ;; local operation or by an explicit call to force-gcontext-changes.
  (declare (type drawable drawable)
	   (type (or null boole-constant) function)
	   (type (or null pixel) plane-mask foreground background)
	   (type (or null card16) line-width dash-offset)
	   (type (or null int16) ts-x ts-y clip-x clip-y)
	   (type (or null (member :solid :dash :double-dash)) line-style)
	   (type (or null (member :not-last :butt :round :projecting)) cap-style)
	   (type (or null (member :miter :round :bevel)) join-style)
	   (type (or null (member :solid :tiled :opaque-stippled :stippled)) fill-style)
	   (type (or null (member :even-odd :winding)) fill-rule)
	   (type (or null (member :chord :pie-slice)) arc-mode)
	   (type (or null pixmap) tile stipple)
	   (type (or null fontable) font)
	   (type (or null (member :clip-by-children :include-inferiors)) subwindow-mode)
	   (type (or null (member :on :off)) exposures)
	   (type (or null (member :none) pixmap rect-seq) clip-mask)
	   (type (or null (member :unsorted :y-sorted :yx-sorted :yx-banded)) clip-ordering)
	   (type (or null (or card8 (clx-sequence card8))) dashes)
	   (type boolean cache)
	   (clx-values gcontext)))

;; For each argument to create-gcontext (except font, clip-mask and
;; clip-ordering) declared as (type <type> <name>), there is an accessor:

(defun gcontext-<name> (gcontext)
  ;; The value will be nil if the last value stored is unknown (e.g., the cache was
  ;; off, or the component was copied from a gcontext with unknown state).
  (declare (type gcontext gcontext)
	   (clx-values <type>)))

;; For each argument to create-gcontext (except clip-mask and clip-ordering) declared
;; as (type (or null <type>) <name>), there is a setf for the corresponding accessor:

(defsetf gcontext-<name> (gcontext) (value)
  (declare (type gcontext gcontext)
	   (type <type> value)))

(defun gcontext-font (gcontext &optional metrics-p)
  ;; If the stored font is known, it is returned.  If it is not known and
  ;; metrics-p is false, then nil is returned.  If it is not known and
  ;; metrics-p is true, then a pseudo font is returned.  Full metric and
  ;; property information can be obtained, but the font does not have a name or
  ;; a resource-id, and attempts to use it where a resource-id is required will
  ;; result in an invalid-font error.
  (declare (type gcontext gcontext)
	   (type boolean metrics-p)
	   (clx-values (or null font))))

(defun gcontext-clip-mask (gcontext)
  (declare (type gcontext gcontext)
	   (clx-values (or null (member :none) pixmap rect-seq)
		   (or null (member :unsorted :y-sorted :yx-sorted :yx-banded)))))

(defsetf gcontext-clip-mask (gcontext &optional ordering) (clip-mask)
  ;; Is nil illegal here, or is it transformed to a vector?
  ;; A bit strange, but retains setf form.
  (declare (type gcontext gcontext)
	   (type (or null (member :unsorted :y-sorted :yx-sorted :yx-banded)) clip-ordering)
	   (type (or (member :none) pixmap rect-seq) clip-mask)))

(defun force-gcontext-changes (gcontext)
  ;; Force any delayed changes.
  (declare (type gcontext gcontext)))

(defmacro with-gcontext ((gcontext &key
			  function plane-mask foreground background
			  line-width line-style cap-style join-style fill-style fill-rule
			  arc-mode tile stipple ts-x ts-y font subwindow-mode
			  exposures clip-x clip-y clip-mask clip-ordering
			  dashes dash-offset)
			 &body body)
  ;; Changes gcontext components within the dynamic scope of the body (i.e.,
  ;; indefinite scope and dynamic extent), on a per-process basis in a multi-process
  ;; environment.  The values are all evaluated before bindings are performed.  The
  ;; body is not surrounded by a with-display.  If cache-p is nil or the some
  ;; component states are unknown, this will implement save/restore by creating a
  ;; temporary gcontext and doing gcontext-components to and from it.
  )

(defun copy-gcontext-components (src dst &rest keys)
  (declare (type gcontext src dst)
	   (type (clx-list gcontext-key) keys)))

(defun copy-gcontext (src dst)
  (declare (type gcontext src dst))
  ;; Copies all components.
  )
	   
(defun free-gcontext (gcontext)
  (declare (type gcontext gcontext)))

(defun clear-area (window &key (x 0) (y 0) width height exposures-p)
  ;; Passing in a zero width or height is a no-op.  A null width or height translates
  ;; into a zero value in the protocol request.
  (declare (type window window)
	   (type int16 x y)
	   (type (or null card16) width height)
	   (type boolean exposures-p)))

(defun copy-area (src gcontext src-x src-y width height dst dst-x dst-y)
  (declare (type drawable src dst)
	   (type gcontext gcontext)
	   (type int16 src-x src-y dst-x dst-y)
	   (type card16 width height)))

(defun copy-plane (src gcontext plane src-x src-y width height dst dst-x dst-y)
  (declare (type drawable src dst)
	   (type gcontext gcontext)
	   (type pixel plane)
	   (type int16 src-x src-y dst-x dst-y)
	   (type card16 width height)))

(defun draw-point (drawable gcontext x y)
  ;; Should be clever about appending to existing buffered protocol request, provided
  ;; gcontext has not been modified.
  (declare (type drawable drawable)
	   (type gcontext gcontext)
	   (type int16 x y)))

(defun draw-points (drawable gcontext points &optional relative-p)
  (declare (type drawable drawable)
	   (type gcontext gcontext)
	   (type point-seq points)
	   (type boolean relative-p)))

(defun draw-line (drawable gcontext x1 y1 x2 y2 &optional relative-p)
  ;; Should be clever about appending to existing buffered protocol request, provided
  ;; gcontext has not been modified.
  (declare (type drawable drawable)
	   (type gcontext gcontext)
	   (type int16 x1 y1 x2 y2)
	   (type boolean relative-p)))

(defun draw-lines (drawable gcontext points &key relative-p fill-p (shape :complex))
  (declare (type drawable drawable)
	   (type gcontext gcontext)
	   (type point-seq points)
	   (type boolean relative-p fill-p)
	   (type (member :complex :non-convex :convex) shape)))

(defun draw-segments (drawable gcontext segments)
  (declare (type drawable drawable)
	   (type gcontext gcontext)
	   (type seg-seq segments)))

(defun draw-rectangle (drawable gcontext x y width height &optional fill-p)
  ;; Should be clever about appending to existing buffered protocol request, provided
  ;; gcontext has not been modified.
  (declare (type drawable drawable)
	   (type gcontext gcontext)
	   (type int16 x y)
	   (type card16 width height)
	   (type boolean fill-p)))

(defun draw-rectangles (drawable gcontext rectangles &optional fill-p)
  (declare (type drawable drawable)
	   (type gcontext gcontext)
	   (type rect-seq rectangles)
	   (type boolean fill-p)))

(defun draw-arc (drawable gcontext x y width height angle1 angle2 &optional fill-p)
  ;; Should be clever about appending to existing buffered protocol request, provided
  ;; gcontext has not been modified.
  (declare (type drawable drawable)
	   (type gcontext gcontext)
	   (type int16 x y)
	   (type card16 width height)
	   (type angle angle1 angle2)
	   (type boolean fill-p)))

(defun draw-arcs (drawable gcontext arcs &optional fill-p)
  (declare (type drawable drawable)
	   (type gcontext gcontext)
	   (type arc-seq arcs)
	   (type boolean fill-p)))

;; The following image routines are bare minimum.  It may be useful to define some
;; form of "image" object to hide representation details and format conversions.  It
;; also may be useful to provide stream-oriented interfaces for reading and writing
;; the data.

(defun put-raw-image (drawable gcontext data
		      &key (start 0) depth x y width height (left-pad 0) format)
  ;; Data must be a sequence of 8-bit quantities, already in the appropriate format
  ;; for transmission; the caller is responsible for all byte and bit swapping and
  ;; compaction.  Start is the starting index in data; the end is computed from the
  ;; other arguments.
  (declare (type drawable drawable)
	   (type gcontext gcontext)
	   (type (clx-sequence card8) data)
	   (type array-index start)
	   (type card8 depth left-pad)
	   (type int16 x y)
	   (type card16 width height)
	   (type (member :bitmap :xy-pixmap :z-pixmap) format)))

(defun get-raw-image (drawable &key data (start 0) x y width height
				    (plane-mask 0xffffffff) format
				    (result-type '(vector (unsigned-byte 8))))
  ;; If data is given, it is modified in place (and returned), otherwise a new
  ;; sequence is created and returned, with a size computed from the other arguments
  ;; and the returned depth.  The sequence is filled with 8-bit quantities, in
  ;; transmission format; the caller is responsible for any byte and bit swapping and
  ;; compaction required for further local use.
  (declare (type drawable drawable)
	   (type (or null (clx-sequence card8)) data)
	   (type array-index start)
	   (type int16 x y)
	   (type card16 width height)
	   (type pixel plane-mask)
	   (type (member :xy-pixmap :z-pixmap) format)
	   (clx-values (clx-sequence card8) depth visual-info)))

(defun translate-default (src src-start src-end font dst dst-start)
  ;; dst is guaranteed to have room for (- src-end src-start) integer elements,
  ;; starting at dst-start; whether dst holds 8-bit or 16-bit elements depends
  ;; on context.  font is the current font, if known.  The function should
  ;; translate as many elements of src as possible into indexes in the current
  ;; font, and store them into dst.  The first return value should be the src
  ;; index of the first untranslated element.  If no further elements need to
  ;; be translated, the second return value should be nil.  If a horizontal
  ;; motion is required before further translation, the second return value
  ;; should be the delta in x coordinate.  If a font change is required for
  ;; further translation, the second return value should be the new font.  If
  ;; known, the pixel width of the translated text can be returned as the third
  ;; value; this can allow for appending of subsequent output to the same
  ;; protocol request, if no overall width has been specified at the higher
  ;; level.
  (declare (type sequence src)
	   (type array-index src-start src-end dst-start)
	   (type (or null font) font)
	   (type vector dst)
	   (clx-values array-index (or null int16 font) (or null int32))))

;; There is a question below of whether translate should always be required, or
;; if not, what the default should be or where it should come from.  For
;; example, the default could be something that expected a string as src and
;; translated the CL standard character set to ASCII indexes, and ignored fonts
;; and bits.  Or the default could expect a string but otherwise be "system
;; dependent".  Or the default could be something that expected a vector of
;; integers and did no translation.  Or the default could come from the
;; gcontext (but what about text-extents and text-width?).

(defun text-extents (font sequence &key (start 0) end translate)
  ;; If multiple fonts are involved, font-ascent and font-descent will be the
  ;; maximums.  If multiple directions are involved, the direction will be nil.
  ;; Translate will always be called with a 16-bit dst buffer.
  (declare (type sequence sequence)
	   (type (or font gcontext) font)
	   (type translate translate)
	   (clx-values width ascent descent left right font-ascent font-descent direction
		   (or null array-index))))

(defun text-width (font sequence &key (start 0) end translate)
  ;; Translate will always be called with a 16-bit dst buffer.
  (declare (type sequence sequence)
	   (type (or font gcontext) font)
	   (type translate translate)
	   (clx-values int32 (or null array-index))))

;; This controls the element size of the dst buffer given to translate.  If
;; :default is specified, the size will be based on the current font, if known,
;; and otherwise 16 will be used.  [An alternative would be to pass the buffer
;; size to translate, and allow it to return the desired size if it doesn't
;; like the current size.  The problem is that the protocol doesn't allow
;; switching within a single request, so to allow switching would require
;; knowing the width of text, which isn't necessarily known.  We could call
;; text-width to compute it, but perhaps that is doing too many favors?]  [An
;; additional possibility is to allow an index-size of :two-byte, in which case
;; translate would be given a double-length 8-bit array, and translate would be
;; expected to store first-byte/second-byte instead of 16-bit integers.]

(deftype index-size () '(member :default 8 16))

;; In the glyph functions below, if width is specified, it is assumed to be the
;; total pixel width of whatever string of glyphs is actually drawn.
;; Specifying width will allow for appending the output of subsequent calls to
;; the same protocol request, provided gcontext has not been modified in the
;; interim.  If width is not specified, appending of subsequent output might
;; not occur (unless translate returns the width).  Specifying width is simply
;; a hint, for performance.

(defun draw-glyph (drawable gcontext x y elt
		   &key translate width (size :default))
  ;; Returns true if elt is output, nil if translate refuses to output it.
  ;; Second result is width, if known.
  (declare (type drawable drawable)
	   (type gcontext gcontext)
	   (type int16 x y)
	   (type translate translate)
	   (type (or null int32) width)
	   (type index-size size)
	   (clx-values boolean (or null int32))))

(defun draw-glyphs (drawable gcontext x y sequence
		    &key (start 0) end translate width (size :default))
  ;; First result is new start, if end was not reached.  Second result is
  ;; overall width, if known.
  (declare (type drawable drawable)
	   (type gcontext gcontext)
	   (type int16 x y)
	   (type sequence sequence)
	   (type array-index start)
	   (type (or null array-index) end)
	   (type (or null int32) width)
	   (type translate translate)
	   (type index-size size)
	   (clx-values (or null array-index) (or null int32))))

(defun draw-image-glyph (drawable gcontext x y elt
			 &key translate width (size :default))
  ;; Returns true if elt is output, nil if translate refuses to output it.
  ;; Second result is overall width, if known.  An initial font change is
  ;; allowed from translate.
  (declare (type drawable drawable)
	   (type gcontext gcontext)
	   (type int16 x y)
	   (type translate translate)
	   (type (or null int32) width)
	   (type index-size size)
	   (clx-values boolean (or null int32))))

(defun draw-image-glyphs (drawable gcontext x y sequence
			  &key (start 0) end width translate (size :default))
  ;; An initial font change is allowed from translate, but any subsequent font
  ;; change or horizontal motion will cause termination (because the protocol
  ;; doesn't support chaining).  [Alternatively, font changes could be accepted
  ;; as long as they are accompanied with a width return value, or always
  ;; accept font changes and call text-width as required.  However, horizontal
  ;; motion can't really be accepted, due to semantics.]  First result is new
  ;; start, if end was not reached.  Second result is overall width, if known.
  (declare (type drawable drawable)
	   (type gcontext gcontext)
	   (type int16 x y)
	   (type sequence sequence)
	   (type array-index start)
	   (type (or null array-index) end)
	   (type (or null int32) width)
	   (type translate translate)
	   (type index-size size)
	   (clx-values (or null array-index) (or null int32))))

(defun create-colormap (visual window &optional alloc-p)
  (declare (type visual-info visual)
	   (type window window)
	   (type boolean alloc-p)
	   (clx-values colormap)))

(defun free-colormap (colormap)
  (declare (type colormap colormap)))

(defun copy-colormap-and-free (colormap)
  (declare (type colormap colormap)
	   (clx-values colormap)))

(defun install-colormap (colormap)
  (declare (type colormap colormap)))

(defun uninstall-colormap (colormap)
  (declare (type colormap colormap)))

(defun installed-colormaps (window &key (result-type 'list))
  (declare (type window window)
	   (type type result-type)
	   (clx-values (clx-sequence colormap))))

(defun alloc-color (colormap color)
  (declare (type colormap colormap)
	   (type (or stringable color) color)
	   (clx-values pixel screen-color exact-color)))

(defun alloc-color-cells (colormap colors &key (planes 0) contiguous-p (result-type 'list))
  (declare (type colormap colormap)
	   (type card16 colors planes)
	   (type boolean contiguous-p)
	   (type type result-type)
	   (clx-values (clx-sequence pixel) (clx-sequence mask))))

(defun alloc-color-planes (colormap colors
			   &key (reds 0) (greens 0) (blues 0)
				contiguous-p (result-type 'list))
  (declare (type colormap colormap)
	   (type card16 colors reds greens blues)
	   (type boolean contiguous-p)
	   (type type result-type)
	   (clx-values (clx-sequence pixel) red-mask green-mask blue-mask)))

(defun free-colors (colormap pixels &optional (plane-mask 0))
  (declare (type colormap colormap)
	   (type (clx-sequence pixel) pixels)
	   (type pixel plane-mask)))

(defun store-color (colormap pixel spec &key (red-p t) (green-p t) (blue-p t))
  (declare (type colormap colormap)
	   (type pixel pixel)
	   (type (or stringable color) spec)
	   (type boolean red-p green-p blue-p)))

(defun store-colors (colormap specs &key (red-p t) (green-p t) (blue-p t))
  ;; If stringables are specified for colors, it is unspecified whether all
  ;; stringables are first resolved and then a single StoreColors protocol request is
  ;; issued, or whether multiple StoreColors protocol requests are issued.
  (declare (type colormap colormap)
	   (type (repeat-seq (pixel pixel) ((or stringable color) color)) specs)
	   (type boolean red-p green-p blue-p)))

(defun query-colors (colormap pixels &key (result-type 'list))
  (declare (type colormap colormap)
	   (type (clx-sequence pixel) pixels)
	   (type type result-type)
	   (clx-values (clx-sequence color))))

(defun lookup-color (colormap name)
  (declare (type colormap colormap)
	   (type stringable name)
	   (clx-values screen-color true-color)))

(defun create-cursor (&key source mask x y foreground background)
  (declare (type pixmap source)
	   (type (or null pixmap) mask)
	   (type card16 x y)
	   (type color foreground background)
	   (clx-values cursor)))

(defun create-glyph-cursor (&key source-font source-char mask-font mask-char
				 foreground background)
  (declare (type font source-font)
	   (type card16 source-char)
	   (type (or null font) mask-font)
	   (type (or null card16) mask-char)
	   (type color foreground background)
	   (clx-values cursor)))

(defun free-cursor (cursor)
  (declare (type cursor cursor)))

(defun recolor-cursor (cursor foreground background)
  (declare (type cursor cursor)
	   (type color foreground background)))

(defun query-best-cursor (width height drawable)
  (declare (type card16 width height)
	   (type drawable display)
	   (clx-values width height)))

(defun query-best-tile (width height drawable)
  (declare (type card16 width height)
	   (type drawable drawable)
	   (clx-values width height)))

(defun query-best-stipple (width height drawable)
  (declare (type card16 width height)
	   (type drawable drawable)
	   (clx-values width height)))

(defun query-extension (display name)
  (declare (type display display)
	   (type stringable name)
	   (clx-values major-opcode first-event first-error)))

(defun list-extensions (display &key (result-type 'list))
  (declare (type display display)
	   (type type result-type)
	   (clx-values (clx-sequence string))))

;; Should pointer-mapping setf be changed to set-pointer-mapping?

(defun set-modifier-mapping (display &key shift lock control mod1 mod2 mod3 mod4 mod5)
  ;; Can signal device-busy.
  ;; Setf ought to allow multiple values.
  ;; Returns true for success, nil for failure
  (declare (type display display)
	   (type (clx-sequence card8) shift lock control mod1 mod2 mod3 mod4 mod5)
	   (clx-values (member :success :busy :failed))))

(defun modifier-mapping (display)
  ;; each value is a list of card8s
  (declare (type display display)
	   (clx-values shift lock control mod1 mod2 mod3 mod4 mod5)))

;; Either we will want lots of defconstants for well-known values, or perhaps
;; an integer-to-keyword translation function for well-known values.

(defun change-keyboard-mapping (display keysyms
				&key (start 0) end (first-keycode start))
  ;; start/end give subrange of keysyms
  ;; first-keycode is the first-keycode to store at
  (declare (type display display)
	   (type (array * (* *)) keysyms)
	   (type array-index start)
	   (type (or null array-index) end)
	   (type card8 first-keycode)))

(defun keyboard-mapping (display &key first-keycode start end data)
  ;; First-keycode specifies which keycode to start at (defaults to
  ;; min-keycode).  Start specifies where (in result) to put first-keycode
  ;; (defaults to first-keycode).  (- end start) is the number of keycodes to
  ;; get (end defaults to (1+ max-keycode)).  If data is specified, the results
  ;; are put there.
  (declare (type display display)
	   (type (or null card8) first-keycode)
	   (type (or null array-index) start end)
	   (type (or null (array * (* *))) data)
	   (clx-values (array * (* *)))))

(defun change-keyboard-control (display &key key-click-percent
				bell-percent bell-pitch bell-duration
				led led-mode key auto-repeat-mode)
  (declare (type display display)
	   (type (or null (member :default) int16) key-click-percent
						   bell-percent bell-pitch bell-duration)
	   (type (or null card8) led key)
	   (type (or null (member :on :off)) led-mode)
	   (type (or null (member :on :off :default)) auto-repeat-mode)))

(defun keyboard-control (display)
  (declare (type display display)
	   (clx-values key-click-percent bell-percent bell-pitch bell-duration
		   led-mask global-auto-repeat auto-repeats)))

(defun bell (display &optional (percent-from-normal 0))
  ;; It is assumed that an eventual audio extension to X will provide more complete
  ;; control.
  (declare (type display display)
	   (type int8 percent-from-normal)))

(defun pointer-mapping (display &key (result-type 'list))
  (declare (type display display)
	   (type type result-type)
	   (clx-values (clx-sequence card8))))

(defsetf pointer-mapping (display) (map)
  ;; Can signal device-busy.
  (declare (type display display)
	   (type (clx-sequence card8) map)))

(defun change-pointer-control (display &key acceleration threshold)
  ;; Acceleration is rationalized if necessary.
  (declare (type display display)
	   (type (or null (member :default) number) acceleration)
	   (type (or null (member :default) integer) threshold)))

(defun pointer-control (display)
  (declare (type display display)
	   (clx-values acceleration threshold)))

(defun set-screen-saver (display timeout interval blanking exposures)
  ;; Setf ought to allow multiple values.
  ;; Timeout and interval are in seconds, will be rounded to minutes.
  (declare (type display display)
	   (type (or (member :default) int16) timeout interval)
	   (type (member :on :off :default) blanking exposures)))

(defun screen-saver (display)
  ;; Returns timeout and interval in seconds.
  (declare (type display display)
	   (clx-values timeout interval blanking exposures)))

(defun activate-screen-saver (display)
  (declare (type display display)))

(defun reset-screen-saver (display)
  (declare (type display display)))

(defun add-access-host (display host)
  ;; A string must be acceptable as a host, but otherwise the possible types for host
  ;; are not constrained, and will likely be very system dependent.
  (declare (type display display)))

(defun remove-access-host (display host)
  ;; A string must be acceptable as a host, but otherwise the possible types for host
  ;; are not constrained, and will likely be very system dependent.
  (declare (type display display)))

(defun access-hosts (display &key (result-type 'list))
  ;; The type of host objects returned is not constrained, except that the hosts must
  ;; be acceptable to add-access-host and remove-access-host.
  (declare (type display display)
	   (type type result-type)
	   (clx-values (clx-sequence host) enabled-p)))

(defun access-control (display)
  ;; setf'able
  (declare (type display display)
	   (clx-values boolean)))

(defun close-down-mode (display)
  ;; setf'able
  ;; Cached locally in display object.
  (declare (type display display)
	   (clx-values (member :destroy :retain-permanent :retain-temporary))))

(defun kill-client (display resource-id)
  (declare (type display display)
	   (type resource-id resource-id)))

(defun kill-temporary-clients (display)
  (declare (type display display)))

(defun make-event-mask (&rest keys)
  ;; This is only defined for core events.
  ;; Useful for constructing event-mask, pointer-event-mask, device-event-mask.
  (declare (type (clx-list event-mask-class) keys)
	   (clx-values mask32)))

(defun make-event-keys (event-mask)
  ;; This is only defined for core events.
  (declare (type mask32 event-mask)
	   (clx-values (clx-list event-mask-class))))

(defun make-state-mask (&rest keys)
  ;; Useful for constructing modifier-mask, state-mask.
  (declare (type (clx-list state-mask-key) keys)
	   (clx-values mask16)))

(defun make-state-keys (state-mask)
  (declare (type mask16 mask)
	   (clx-values (clx-list state-mask-key))))

(defmacro with-event-queue ((display) &body body)
  ;; Grants exclusive access to event queue.
  )

(defun event-listen (display &optional (timeout 0))
  (declare (type display display)
	   (type (or null number) timeout)
	   (clx-values (or null number) (or null (member :timeout) (not null))))
  ;; Returns the number of events queued locally, if any, else nil.  Hangs
  ;; waiting for events, forever if timeout is nil, else for the specified
  ;; number of seconds.  The second value returned is :timeout if the
  ;; operation timed out, and some other non-nil value if an EOF has been
  ;; detected.
  )

(defun process-event (display &key handler timeout peek-p discard-p (force-output-p t))
  ;; If force-output-p is true, first invokes display-force-output.  Invokes
  ;; handler on each queued event until handler returns non-nil, and that
  ;; returned object is then returned by process-event.  If peek-p is true,
  ;; then the event is not removed from the queue.  If discard-p is true, then
  ;; events for which handler returns nil are removed from the queue,
  ;; otherwise they are left in place.  Hangs until non-nil is generated for
  ;; some event, or for the specified timeout (in seconds, if given); however,
  ;; it is acceptable for an implementation to wait only once on network data,
  ;; and therefore timeout prematurely.  Returns nil on timeout or EOF, with a
  ;; second return value being :timeout for a timeout and some other non-nil
  ;; value for EOF.  If handler is a sequence, it is expected to contain
  ;; handler functions specific to each event class; the event code is used to
  ;; index the sequence, fetching the appropriate handler.  The arguments to
  ;; the handler are described further below using declare-event.  If
  ;; process-event is invoked recursively, the nested invocation begins with
  ;; the event after the one currently being processed.
  (declare (type display display)
	   (type (or (clx-sequence (function (&key &allow-other-keys) t))
		     (function (&key &allow-other-keys) t))
		 handler)
	   (type (or null number) timeout)
	   (type boolean peek-p)))

(defun make-event-handlers (&key (type 'array) default)
  (declare (type t type)			;Sequence type specifier
	   (type function default)
	   (clx-values sequence))			;Default handler for initial content
  ;; Makes a handler sequence suitable for process-event
  )
   
(defun event-handler (handlers event-key)
  (declare (type sequence handlers)
	   (type event-key event-key)
	   (clx-values function))
  ;; Accessor for a handler sequence
  )

(defsetf event-handler (handlers event-key) (handler)
  (declare (type sequence handlers)
	   (type event-key event-key)
	   (type function handler)
	   (clx-values function))
  ;; Setf accessor for a handler sequence
  )

(defmacro event-case ((display &key timeout peek-p discard-p (force-output-p t))
		      &body clauses)
  (declare (arglist (display &key timeout peek-p discard-p force-output-p)
		    (event-or-events ((&rest args) |...|) &body body) |...|))
  ;; If force-output-p is true, first invokes display-force-output.  Executes
  ;; the matching clause for each queued event until a clause returns non-nil,
  ;; and that returned object is then returned by event-case.  If peek-p is
  ;; true, then the event is not removed from the queue.  If discard-p is
  ;; true, then events for which the clause returns nil are removed from the
  ;; queue, otherwise they are left in place.  Hangs until non-nil is
  ;; generated for some event, or for the specified timeout (in seconds, if
  ;; given); however, it is acceptable for an implementation to wait only once
  ;; on network data, and therefore timeout prematurely.  Returns nil on
  ;; timeout or EOF with a second return value being :timeout for a timeout
  ;; and some other non-nil value for EOF.  In each clause, event-or-events is
  ;; an event-key or a list of event-keys (but they need not be typed as
  ;; keywords) or the symbol t or otherwise (but only in the last clause).
  ;; The keys are not evaluated, and it is an error for the same key to appear
  ;; in more than one clause.  Args is the list of event components of
  ;; interest; corresponding values (if any) are bound to variables with these
  ;; names (i.e., the args are variable names, not keywords, the keywords are
  ;; derived from the variable names).  An arg can also be a (keyword var)
  ;; form, as for keyword args in a lambda lists.  If no t/otherwise clause
  ;; appears, it is equivalent to having one that returns nil.  If
  ;; process-event is invoked recursively, the nested invocation begins with
  ;; the event after the one currently being processed.
  )

(defmacro event-cond ((display &key timeout peek-p discard-p (force-output-p t))
		      &body clauses)
  ;; The clauses of event-cond are of the form:
  ;; (event-or-events binding-list test-form . body-forms)
  ;;
  ;; EVENT-OR-EVENTS	event-key or a list of event-keys (but they
  ;;			need not be typed as keywords) or the symbol t
  ;;			or otherwise (but only in the last clause).  If
  ;;			no t/otherwise clause appears, it is equivalent
  ;;			to having one that returns nil.  The keys are
  ;;			not evaluated, and it is an error for the same
  ;;			key to appear in more than one clause.
  ;;
  ;; BINDING-LIST	The list of event components of interest.
  ;;			corresponding values (if any) are bound to
  ;;			variables with these names (i.e., the binding-list
  ;;			has variable names, not keywords, the keywords are
  ;;			derived from the variable names).  An arg can also
  ;;			be a (keyword var) form, as for keyword args in a
  ;;			lambda list.
  ;;
  ;; The matching TEST-FORM for each queued event is executed until a
  ;; clause's test-form returns non-nil.  Then the BODY-FORMS are
  ;; evaluated, returning the (possibly multiple) values of the last
  ;; form from event-cond.  If there are no body-forms then, if the
  ;; test-form is non-nil, the value of the test-form is returned as a
  ;; single value.
  ;;
  ;; Options:
  ;; FORCE-OUTPUT-P	When true, first invoke display-force-output if no
  ;;		  	input is pending.
  ;;
  ;; PEEK-P		When true, then the event is not removed from the queue.
  ;;
  ;; DISCARD-P		When true, then events for which the clause returns nil
  ;; 			are removed from the queue, otherwise they are left in place.
  ;;
  ;; TIMEOUT		If NIL, hang until non-nil is generated for some event's
  ;;			test-form. Otherwise return NIL after TIMEOUT seconds have
  ;;			elapsed.  NIL is also returned whenever EOF is read.
  ;;			Whenever NIL is returned a second value is returned which
  ;;			is either :TIMEOUT if a timeout occurred or some other
  ;;			non-NIL value if an EOF is detected.
  ;;
  (declare (arglist (display &key timeout peek-p discard-p force-output-p)
		   (event-or-events (&rest args) test-form &body body) |...|))
  )

(defun discard-current-event (display)
  (declare (type display display)
	   (clx-values boolean))
  ;; Discard the current event for DISPLAY.
  ;; Returns NIL when the event queue is empty, else T.
  ;; To ensure events aren't ignored, application code should only call
  ;; this when throwing out of event-case or process-next-event, or from
  ;; inside even-case, event-cond or process-event when :peek-p is T and
  ;; :discard-p is NIL.
 )

(defmacro declare-event (event-codes &rest declares)
  ;; Used to indicate the keyword arguments for handler functions in process-event
  ;; and event-case.  In the declares, an argument listed as (name1 name2) indicates
  ;; synonyms for the same argument.  All process-event handlers can have
  ;; (display display), (event-key event-key), and (boolean send-event-p) as keyword
  ;; arguments, and an event-case clause can also have event-key and send-event-p as
  ;; arguments.
  (declare (arglist event-key-or-keys &rest (type &rest keywords))))

(declare-event (:key-press :key-release :button-press :button-release)
  (card16 sequence)
  (window (window event-window) root)
  ((or null window) child)
  (boolean same-screen-p)
  (int16 x y root-x root-y)
  (card16 state)
  ((or null card32) time)
  ;; for key-press and key-release, code is the keycode
  ;; for button-press and button-release, code is the button number
  (card8 code))

(declare-event :motion-notify
  (card16 sequence)
  (window (window event-window) root)
  ((or null window) child)
  (boolean same-screen-p)
  (int16 x y root-x root-y)
  (card16 state)
  ((or null card32) time)
  (boolean hint-p))

(declare-event (:enter-notify :leave-notify)
  (card16 sequence)
  (window (window event-window) root)
  ((or null window) child)
  (boolean same-screen-p)
  (int16 x y root-x root-y)
  (card16 state)
  ((or null card32) time)
  ((member :normal :grab :ungrab) mode)
  ((member :ancestor :virtual :inferior :nonlinear :nonlinear-virtual) kind)
  (boolean focus-p))

(declare-event (:focus-in :focus-out)
  (card16 sequence)
  (window (window event-window))
  ((member :normal :while-grabbed :grab :ungrab) mode)
  ((member :ancestor :virtual :inferior :nonlinear :nonlinear-virtual
	   :pointer :pointer-root :none)
   kind))

(declare-event :keymap-notify
  ((bit-vector 256) keymap))

(declare-event :exposure
  (card16 sequence)
  (window (window event-window))