255 lines
10 KiB
Scheme
255 lines
10 KiB
Scheme
;; an enumerated type corresponding to XGCValues.
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(define-enumerated-type gc-value :gc-value
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gc-value?
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gc-values
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gc-value-name
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gc-value-index
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(function plane-mask foreground background line-width line-style cap-style
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join-style fill-style fill-rule tile stipple ts-x-origin ts-y-origin
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font subwindow-mode graphics-exposures clip-x-origin clip-y-origin
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clip-mask dash-offset dash-list arc-mode))
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(define gc-value-alist->vector
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(make-enum-alist->vector
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gc-values gc-value-index
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(lambda (i)
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(case i
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((1 2 3) pixel-Xpixel)
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((10 11 19) pixmap-Xpixmap)
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((14) font-Xfont)
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((16) (lambda (x) (if x 1 0)))
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(else (lambda (x) x))))))
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;; create-gcontext returns a newly create graphic context for the
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;; specified drawable (a window or a pixmap). The gc-value-alist has
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;; to be an alist mapping a gc-value (defined above) to a
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;; corresponding value. See XCreateGC.
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(define (create-gcontext drawable gc-value-alist)
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(let ((display (drawable-display drawable))
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(Xobject (drawable-Xobject drawable))
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(values (gc-value-alist->vector gc-value-alist)))
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(let ((Xgcontext (%create-gcontext (display-Xdisplay display)
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Xobject
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values)))
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(make-gcontext Xgcontext display #t))))
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(import-lambda-definition %create-gcontext (Xdisplay Xdrawable values)
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"scx_Create_Gc")
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;; copy-gcontext returns a newly create duplicate of the given
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;; gcontext, and assigns it to the specified drawable. See XCopyGC.
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(define (copy-gcontext gcontext drawable)
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(let* ((new-gcontext (create-gcontext drawable '()))
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(new-Xgcontext (gcontext-Xgcontext new-gcontext))
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(Xgcontext (gcontext-Xgcontext gcontext))
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(Xdisplay (display-Xdisplay (gcontext-display gcontext))))
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(%copy-gcontext Xdisplay Xgcontext new-Xgcontext)
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new-gcontext))
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(import-lambda-definition %copy-gcontext (Xdisplay Xsource Xdest)
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"scx_Copy_Gc")
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;; copy-gcontext! copies the specified attributes from gc-from to
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;; gc-to. The attributes have to be a list of gc-values as defined
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;; above. if no gc-values list is specified, then all attributes are
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;; copied. See XCopyGC.
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(define (copy-gcontext! gc-from gc-to . maybe-gc-values)
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(let ((gc-values (if (null? maybe-gc-values)
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'all
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(map gc-value-name (car maybe-gc-values)))))
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(%copy-gcontext! (display-Xdisplay (gcontext-display gc-from))
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(gcontext-Xgcontext gc-from)
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(gcontext-Xgcontext gc-to)
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gc-values)))
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(import-lambda-definition %copy-gcontext! (Xdisplay Xfrom Xto attrs)
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"scx_Copy_Gc_To_Gc")
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;; get-gontext-values returns an alist of all attributes for the
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;; specified graphic context. See the gc-value and create-gcontext
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;; above. See XGetGCValues.
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(define (get-gcontext-values gcontext)
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(let* ((Xgcontext (gcontext-Xgcontext gcontext))
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(display (gcontext-display gcontext))
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(Xdisplay (display-Xdisplay display)))
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(let ((vals (%get-gcontext-values Xgcontext Xdisplay)))
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(if (not vals)
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(error "cannot get gcontext values." gcontext)
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(vector->gc-value-alist vals display)))))
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(import-lambda-definition %get-gcontext-values (Xgcontext Xdisplay)
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"scx_Get_Gc_Values")
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(define vector->gc-value-alist
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(make-vector->enum-alist
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gc-values
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(lambda (i display)
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(case i
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((1 2 3) (lambda (Xpixel)
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(make-pixel Xpixel #f #f)))
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((11 12 20) (lambda (Xpixmap)
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(make-pixmap Xpixmap display #f)))
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((15) (lambda (Xfont)
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;; -> see Xlib Programming Manual 5.12
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(make-font #f Xfont #f display #t)))
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(else (lambda (x) x))))))
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(define (make-gcontext-getter name)
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(lambda (gcontext)
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(cdr (assq name (get-gcontext-values gcontext)))))
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(define gcontext-function (make-gcontext-getter (gc-value function)))
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(define gcontext-plane-mask (make-gcontext-getter (gc-value plane-mask)))
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(define gcontext-foreground (make-gcontext-getter (gc-value foreground)))
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(define gcontext-background (make-gcontext-getter (gc-value background)))
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(define gcontext-line-width (make-gcontext-getter (gc-value line-width)))
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(define gcontext-line-style (make-gcontext-getter (gc-value line-style)))
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(define gcontext-cap-style (make-gcontext-getter (gc-value cap-style)))
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(define gcontext-join-style (make-gcontext-getter (gc-value join-style)))
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(define gcontext-fill-style (make-gcontext-getter (gc-value fill-style)))
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(define gcontext-fill-rule (make-gcontext-getter (gc-value fill-rule)))
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(define gcontext-arc-mode (make-gcontext-getter (gc-value arc-mode)))
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(define gcontext-tile (make-gcontext-getter (gc-value tile)))
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(define gcontext-stipple (make-gcontext-getter (gc-value stipple)))
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(define gcontext-ts-x-origin (make-gcontext-getter (gc-value ts-x-origin)))
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(define gcontext-ts-y-origin (make-gcontext-getter (gc-value ts-y-origin)))
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(define gcontext-font (make-gcontext-getter (gc-value font)))
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(define gcontext-subwindow-mode
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(make-gcontext-getter (gc-value subwindow-mode)))
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(define gcontext-graphics-exposures
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(make-gcontext-getter (gc-value graphics-exposures)))
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(define gcontext-clip-x-origin (make-gcontext-getter (gc-value clip-x-origin)))
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(define gcontext-clip-y-origin (make-gcontext-getter (gc-value clip-y-origin)))
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(define gcontext-clip-mask (make-gcontext-getter (gc-value clip-mask)))
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(define gcontext-dash-offset (make-gcontext-getter (gc-value dash-offset)))
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(define gcontext-dash-list (make-gcontext-getter (gc-value dash-list)))
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;; Alternative definition of gcontext-font. See XGcontextFromGC
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;
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;(define (gcontext-font gcontext)
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; (let* ((display (gcontext-display gcontext))
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; (Xfontstruct (%gcontext-font
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; (display-Xdisplay display)
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; (gcontext-Xgcontext gcontext))))
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; (make-font #f #f Xfontstruct display #f)))
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;
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;(import-lambda-definition %gcontext-font (Xdisplay Xgcontext)
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; "scx_GContext_Font") ; defined in font.c
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;; change-gcontext sets some attributes of the specified graphic
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;; context. The format of the arguments is like for
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;; create-gcontext. See XChangeGC.
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(define (change-gcontext gcontext gc-value-alist)
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(%change-gcontext (gcontext-Xgcontext gcontext)
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(display-Xdisplay (gcontext-display gcontext))
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(gc-value-alist->vector gc-value-alist)))
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(import-lambda-definition %change-gcontext (Xgcontext Xdisplay args)
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"scx_Change_Gc")
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(define (make-gcontext-setter name)
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(lambda (gcontext value)
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(change-gcontext gcontext (list (cons name value)))))
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(define set-gcontext-function!
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(make-gcontext-setter (gc-value function)))
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(define set-gcontext-plane-mask!
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(make-gcontext-setter (gc-value plane-mask)))
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(define set-gcontext-foreground!
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(make-gcontext-setter (gc-value foreground)))
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(define set-gcontext-background!
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(make-gcontext-setter (gc-value background)))
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(define set-gcontext-line-width!
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(make-gcontext-setter (gc-value line-width)))
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(define set-gcontext-line-style!
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(make-gcontext-setter (gc-value line-style)))
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(define set-gcontext-cap-style!
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(make-gcontext-setter (gc-value cap-style)))
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(define set-gcontext-join-style!
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(make-gcontext-setter (gc-value join-style)))
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(define set-gcontext-fill-style!
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(make-gcontext-setter (gc-value fill-style)))
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(define set-gcontext-fill-rule!
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(make-gcontext-setter (gc-value fill-rule)))
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(define set-gcontext-arc-mode! (make-gcontext-setter (gc-value arc-mode)))
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(define set-gcontext-tile! (make-gcontext-setter (gc-value tile)))
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(define set-gcontext-stipple! (make-gcontext-setter (gc-value stipple)))
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(define set-gcontext-ts-x-origin!
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(make-gcontext-setter (gc-value ts-x-origin)))
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(define set-gcontext-ts-y-origin!
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(make-gcontext-setter (gc-value ts-y-origin)))
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(define set-gcontext-font! (make-gcontext-setter (gc-value font)))
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(define set-gcontext-subwindow-mode!
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(make-gcontext-setter (gc-value subwindow-mode)))
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(define set-gcontext-graphics-exposures!
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(make-gcontext-setter (gc-value graphics-exposures)))
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(define set-gcontext-clip-x-origin!
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(make-gcontext-setter (gc-value clip-x-origin)))
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(define set-gcontext-clip-y-origin!
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(make-gcontext-setter (gc-value clip-y-origin)))
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(define set-gcontext-clip-mask!
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(make-gcontext-setter (gc-value clip-mask)))
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(define set-gcontext-dash-offset!
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(make-gcontext-setter (gc-value dash-offset)))
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(define set-gcontext-dash-list!
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(make-gcontext-setter (gc-value dash-list)))
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;; set-dashlist! is a more complex form of set-dashes!. (set-dashes! N) is
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;; equivalent to (set-dash-list! .. #(N N))
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(define (set-gcontext-dashlist! gcontext dash-offset dash-list)
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(%set-dashlist (gcontext-Xgcontext gcontext)
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(display-Xdisplay (gcontext-display gcontext))
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dash-offset
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(list->vector dash-list)))
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(import-lambda-definition %set-dashlist (Xgcontext Xdisplay dashoffset dashlist)
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"scx_Set_Gcontext_Dashlist")
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;; set-gcontext-clip-rectangles changes the clip-mask in the specified
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;; graphic context to the list of rectangles and sets the clip
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;; origin. Each rectangle has to be a list (x y height width). The
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;; coordinates of the rectangles are interpreted relative to the clip
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;; origin specified by x and y. ordering can be one of 'unsorted,
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;; 'y-sorted, 'xy-sorted or 'xy-banded. See XSetClipRectangles.
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(define (set-gcontext-clip-rectangles! gcontext x y rectangles ordering)
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(%set-gcontext-clip-rectangles! (gcontext-Xgcontext gcontext)
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(display-Xdisplay (gcontext-display gcontext))
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x y
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(list->vector rectangles)
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ordering))
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(import-lambda-definition %set-gcontext-clip-rectangles! (Xgcontext Xdisplay x
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y v ord)
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"scx_Set_Gcontext_Clip_Rectangles")
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;; query-best-size/-cursor/-tile/-stipple function returns the best or
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;; closest size to the specified size. For 'cursor, this is the
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;; largest size that can be fully displayed on the screen specified by
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;; which_screen. For 'tile, this is the size that can be tiled
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;; fastest. For 'stipple, this is the size that can be stippled
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;; fastest. See XQueryBestSize.
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(define (query-best-size display width height shape)
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(%query-best-size (display-Xdisplay display)
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width height shape))
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(import-lambda-definition %query-best-size (Xdisplay width height shape)
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"scx_Query_Best_Size")
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(define (query-best-cursor display width height)
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(query-best-size display width height 'cursor))
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(define (query-best-tile display width height)
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(query-best-size display width height 'tile))
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(define (query-best-stipple display width height)
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(query-best-size display width height 'stipple))
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