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xlib.lisp
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xlib.lisp
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(in-package :cl-cairo2)
;;;;
;;;; a limited interface to certain Xlib functions
;;;;
;;;; types
(defctype display :pointer)
(defctype xid :unsigned-long) ; X Id type
(defctype drawable xid)
(defctype window xid)
(defctype pixmap xid)
(defctype cursor xid)
(defctype colormap xid)
(defctype graphics-context xid)
(defctype visual :pointer)
(defctype xatom :unsigned-long)
(defctype bool :int)
;; constants
(defmacro define-bitmask-constants (&body name-power-pairs)
"Define a list of constants from name-value pairs, raising 2 to
the power value."
(labels ((dbc (pairs)
(case (length pairs)
(0 nil)
(1 (error "no power after ~a" (car name-power-pairs)))
(t (destructuring-bind (name power &rest rest) pairs
`((defconstant ,name (expt 2 ,power))
,@(dbc rest)))))))
`(progn
,@(dbc name-power-pairs))))
(defconstant noeventmask 0)
(define-bitmask-constants
keypressmask 0
keyreleasemask 1
buttonpressmask 2
buttonreleasemask 3
enterwindowmask 4
leavewindowmask 5
pointermotionmask 6
pointermotionhintmask 7
button1motionmask 8
button2motionmask 9
button3motionmask 10
button4motionmask 11
button5motionmask 12
buttonmotionmask 13
keymapstatemask 14
exposuremask 15
visibilitychangemask 16
structurenotifymask 17
resizeredirectmask 18
substructurenotifymask 19
substructureredirectmask 20
focuschangemask 21
propertychangemask 23
colormapchangemask 23
ownergrabbuttonmask 24)
;;;; error code handling
(defmacro check-zero-status (call)
"Check the return calue of call, if zero, display an error message."
(with-unique-names (status)
`(let ((,status ,call))
(if (zerop ,status)
(error "operations ~a returned status (error) ~a" ',call ,status)
(values)))))
;;;; display operations
(defcfun ("XOpenDisplay" xopendisplay) display
(display-name :string))
(defcfun ("XCloseDisplay" xclosedisplay) :int
(display display))
;;;; defaults for the X11 display & screen
(defcfun ("XDefaultDepth" xdefaultdepth) :int
(display display)
(screen-number :int))
(defcfun ("XDefaultRootWindow" xdefaultrootwindow) window
(display display))
(defcfun ("XDefaultScreen" xdefaultscreen) :int
(display display))
(defcfun ("XDefaultVisual" xdefaultvisual) visual
(display display)
(screen-number :int))
(defcfun ("XBlackPixel" xblackpixel) :unsigned-long
(display display)
(screen-number :int))
(defcfun ("XWhitePixel" xwhitepixel) :unsigned-long
(display display)
(screen-number :int))
;;;; graphics contexts
(defcfun ("XDefaultGC" xdefaultgc) graphics-context
(display display)
(screen-number :int))
(defcfun ("XCreateGC" xcreategc) graphics-context
(display display)
(drawable drawable)
(valuemask :unsigned-long)
(xgcvalues :pointer))
(defcfun ("XFreeGC" xfreegc) :int
(display display)
(graphics-context graphics-context))
;;;; window and pixmap management
(defcfun ("XMapWindow" xmapwindow) :int
(display display)
(window window))
(defcfun ("XCreateSimpleWindow" xcreatesimplewindow) window
(display display)
(parent window)
(x :int)
(y :int)
(width :unsigned-int)
(height :unsigned-int)
(border-width :unsigned-int)
(border :unsigned-long)
(background :unsigned-long))
(defcfun ("XCreateWindow" xcreatewindow) window
(display display)
(parent window)
(x :int)
(y :int)
(width :unsigned-int)
(height :unsigned-int)
(border-width :unsigned-int)
(depth :int)
(class :unsigned-int)
(visual visual)
(valuemask :unsigned-long)
(attributes :pointer))
(defcstruct xsetwindowattributes
(background-pixmap pixmap)
(background-pixel :unsigned-long)
(border-pixmap pixmap)
(border-pixel :unsigned-long)
(bit-gravity :int)
(win-gravity :int)
(backing-store :int)
(backing-planes :unsigned-long)
(backing-pixel :unsigned-long)
(save-under bool)
(event-mask :long)
(do-not-propagate_mask :long)
(override-redirect bool)
(colormap colormap)
(cursor cursor))
(define-bitmask-constants
CWBackPixmap 0
CWBackPixel 1
CWBorderPixmap 2
CWBorderPixel 3
CWBitGravity 4
CWWinGravity 5
CWBackingStore 6
CWBackingPlanes 7
CWBackingPixel 8
CWOverrideRedirect 9
CWSaveUnder 10
CWEventMask 11
CWDontPropagate 12
CWColormap 13
CWCursor 14)
(defcfun ("XChangeWindowAttributes" xchangewindowattributes) :int
(display display)
(window window)
(valuemask :unsigned-long)
(attributes :pointer))
(defcfun ("XDestroyWindow" xdestroywindow) :int
(display display)
(window window))
(defcfun ("XCreatePixmap" xcreatepixmap) pixmap
(display display)
(drawable drawable)
(width :unsigned-int)
(height :unsigned-int)
(depth :unsigned-int))
(defcfun ("XFreePixmap" xfreepixmap) :int
(display display)
(pixmap pixmap))
(defcfun ("XSelectInput" xselectinput) :int
(display display)
(window window)
(event-mask :long))
(defcfun ("XCopyArea" xcopyarea) :int
(display display)
(source drawable)
(destination drawable)
(graphics-context graphics-context)
(source-x :int)
(source-y :int)
(width :unsigned-int)
(height :unsigned-int)
(destination-x :int)
(destination-y :int))
(defcfun ("XSetGraphicsExposures" xsetgraphicsexposures) :int
(display display)
(graphics-context graphics-context)
(graphics-exposures bool))
;; synchronization & threads
(eval-when (:compile-toplevel :load-toplevel :execute)
(defcfun ("XInitThreads" xinitthreads) :int))
(defcfun ("XLockDisplay" xlockdisplay) :int
(display display))
(defcfun ("XUnlockDisplay" xunlockdisplay) :int
(display display))
(defcfun ("XSynchronize" xsynchronize) :int
(display display)
(onoff :int))
(defcfun ("XFlush" xflush) :int
(display display))
(defcfun ("XSync" xsync) :int
(display display)
(discard :int))
;; atoms & protocols
(defcfun ("XInternAtom" xinternatom) xatom
(display display)
(atom-name :string)
(only-if-exists :int))
(defcfun ("XSetWMProtocols" xsetwmprotocols) :int
(display display)
(window window)
(protocols :pointer)
(count :int))
;; events
(defcstruct xanyevent
(type :int)
(serial :unsigned-long)
(send-event bool)
(display display)
(window window))
(defcstruct xexposeevent
(type :int)
(serial :unsigned-long)
(send-event bool)
(display display)
(drawable drawable)
(x :int)
(y :int)
(width :int)
(height :int)
(count :int)
(major-code :int)
(minor-code :int))
(defcstruct xdestroywindowevent
(type :int)
(serial :unsigned-long)
(send-event bool)
(display display)
(event window)
(window window))
(defcstruct xclientmessageevent
(type :int)
(serial :unsigned-long)
(send-event bool)
(display display)
(window window)
(message-type xatom)
(format :int)
;; we only use first field, union of message data is not included
(data0 :unsigned-long))
(defcstruct xvisibilityevent
(type :int)
(serial :unsigned-long)
(send-event bool)
(display display)
(window window)
(state :int))
(defcfun ("XNextEvent" xnextevent) :int
(display display)
(event-return :pointer))
(defcfun ("XSendEvent" xsendevent) :int
(display display)
(window window)
(propagate bool)
(event-mask :long)
(xevent :pointer))
;; hints & misc
(defcstruct xsizehints
(flags :long) ; marks which fields in this structure are defined
(x :int) ; Obsolete
(y :int) ; Obsolete
(width :int) ; Obsolete
(height :int) ; Obsolete
(min-width :int)
(min-height :int)
(max-width :int)
(max-height :int)
(min-aspect-x :int) ; numerator
(min-aspect-y :int) ; denominator
(max-aspect-x :int) ; numerator
(max-aspect-y :int) ; denominator
(base-width :int)
(base_height :int)
(win_gravity :int))
(define-bitmask-constants
USPosition 0
USSize 1
PPosition 2
PSize 3
PMinSize 4
PMaxSize 5
PResizeInc 6
PAspect 7
PBaseSize 8
PWinGravity 9)
(defcfun ("XAllocSizeHints" xallocsizehints) :pointer)
(defcfun ("XSetWMNormalHints" xsetwmnormalhints) :void
(display display)
(window window)
(hints :pointer))
(defcfun ("XStoreName" xstorename) :int
(display display)
(window window)
(window-name :string))
(defcfun ("XFree" xfree) :int
(data :pointer))
;; extensions
(defcfun ("XAddExtension" xaddextension) :pointer
(display display))
(defcstruct xextcodes
(extensions :int)
(major-opcode :int)
(first-event :int)
(first-error :int))
;; image manipulation
(cffi:defcstruct XImage
(width :int)
(height :int)
(xoffset :int)
(format :int)
(data :pointer)
(byte-order :int)
(bitmap-unit :int)
(bitmap-bit-order :int)
(bitmap-pad :int)
(depth :int)
(bytes-per-line :int)
(bits-per-pixel :int)
(red-mask :unsigned-long)
(green-mask :unsigned-long)
(blue-mask :unsigned-long)
(obdata :pointer)
;; funcs
(create-image :pointer)
(destroy-image :pointer)
(get-pixel :pointer)
(put-pixel :pointer)
(sub-image :pointer)
(add-pixel :pointer))
(defcfun ("XInitImage" xinitimage) :int
(ximage :pointer))
(defcfun ("XPutImage" xputimage) :int
(display display)
(drawable drawable)
(graphics-context graphics-context)
(ximage :pointer)
(src-x :int)
(src-y :int)
(dest-x :int)
(dest-y :int)
(width :unsigned-int)
(height :unsigned-int))
;; call xinitthreads
(eval-when (:compile-toplevel :load-toplevel :execute)
(defvar *xinitthreads-called?* nil)
(defun call-xinitthreads ()
(unless *xinitthreads-called?*
(xinitthreads)
(setf *xinitthreads-called?* t))))
(eval-when (:compile-toplevel :load-toplevel :execute)
(call-xinitthreads))
;; various higher level functions
(defun set-window-size-hints (display window
min-window-width max-window-width
min-window-height max-window-height)
;; set size hints on window (most window managers will respect this)
(let ((hints (xallocsizehints)))
(with-foreign-slots ((flags x y min-width min-height
max-width max-height)
hints
xsizehints)
;; we only set the first four values because old WM's might
;; get confused if we don't, they should be ignored
(setf flags (logior pminsize pmaxsize)
x 0
y 0
;; we don't need to set the following, but some WMs go
;; crazy if we don't
(foreign-slot-value hints 'xsizehints 'width) max-window-width
(foreign-slot-value hints 'xsizehints 'height) max-window-height
;; set desired min/max width/height
min-width min-window-width
max-width max-window-width
min-height min-window-height
max-height max-window-height)
(xsetwmnormalhints display window hints)
(xfree hints))))
(defun create-window (display parent width height class visual background-pixel
event-mask &optional (backing-store t))
"Create an x11 window, placed at 0 0, with the given attributes.
For internal use in the cl-cairo2 package."
;; call xcreatewindow with attributes
(with-foreign-object (attributes 'xsetwindowattributes)
(setf (foreign-slot-value attributes 'xsetwindowattributes 'event-mask)
event-mask
(foreign-slot-value attributes 'xsetwindowattributes 'background-pixel)
background-pixel
(foreign-slot-value attributes 'xsetwindowattributes 'backing-store)
(if backing-store 1 0))
(xcreatewindow display parent 0 0 width height
0 ; zero border width
0 ; depth - copy from parent
(ecase class
(copyfromparent 0)
(inputoutput 1)
(inputonly 2)) ; class
visual
(if (eq class 'inputonly)
cweventmask
(logior cwbackpixel cwbackingstore cweventmask))
attributes)))