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text.cl
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;;; -*- Mode: LISP; Syntax: Common-lisp; Package: XLIB; Base: 10; Lowercase: Yes -*-
;;; CLX text keyboard and pointer requests
;;;
;;; TEXAS INSTRUMENTS INCORPORATED
;;; P.O. BOX 2909
;;; AUSTIN, TEXAS 78769
;;;
;;; Copyright (C) 1987 Texas Instruments Incorporated.
;;;
;;; Permission is granted to any individual or institution to use, copy, modify,
;;; and distribute this software, provided that this complete copyright and
;;; permission notice is maintained, intact, in all copies and supporting
;;; documentation.
;;;
;;; Texas Instruments Incorporated provides this software "as is" without
;;; express or implied warranty.
;;;
(in-package :xlib)
;; Strings are broken up into chunks of this size
(defparameter *max-string-size* 254)
;; In the functions below, the transform is used to convert an element of the
;; sequence into a font index. The transform is applied to each element of the
;; (sub)sequence, until either the transform returns nil or the end of the
;; (sub)sequence is reached. If transform returns nil for an element, the
;; index of that element in the sequence is returned, otherwise nil is
;; returned.
(deftype translation-function ()
#+(or allegro explorer) t
#-(or allegro explorer)
'(function (sequence array-index array-index (or null font) vector array-index)
(values array-index (or null int16 font) (or null int32))))
;; In the functions below, if width is specified, it is assumed to be the 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.
;; Specifying width is simply a hint, for performance. Note that specifying
;; width may be difficult if transform can return nil.
(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.
;; (returns values: ending-index
;; (OR null horizontal-motion font)
;; (OR null translated-width))
(declare (type sequence src)
(type array-index src-start src-end dst-start)
(type (or null font) font)
(type vector dst)
(inline graphic-char-p))
(declare (values integer (or null integer font) (or null integer)))
font ;;not used
(if (stringp src)
(do ((i src-start (index+ i 1))
(j dst-start (index+ j 1))
(char))
((index>= i src-end)
i)
(declare (type array-index i j))
(if (graphic-char-p (setq char (char src i)))
(setf (aref dst j) (char->card8 char))
(return i)))
(do ((i src-start (index+ i 1))
(j dst-start (index+ j 1))
(elt))
((index>= i src-end)
i)
(declare (type array-index i j))
(setq elt (elt src i))
(cond ((and (characterp elt) (graphic-char-p elt))
(setf (aref dst j) (char->card8 elt)))
((integerp elt)
(setf (aref dst j) elt))
(t
(return i))))))
;; 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))
(declare (type (or null translation-function) translate)
#+clx-ansi-common-lisp
(dynamic-extent translate)
#+(and lispm (not clx-ansi-common-lisp))
(sys:downward-funarg #+Genera * #-Genera translate))
(declare (values width ascent descent left right
font-ascent font-descent direction
(or null array-index)))
(when (type? font 'gcontext)
(force-gcontext-changes font)
(setq font (gcontext-font font t)))
(check-type font font)
(let* ((left-bearing 0)
(right-bearing 0)
;; Sum of widths
(width 0)
(ascent 0)
(descent 0)
(overall-ascent (font-ascent font))
(overall-descent (font-descent font))
(overall-direction (font-direction font))
(next-start nil)
(display (font-display font)))
(declare (type int16 ascent descent overall-ascent overall-descent)
(type int32 left-bearing right-bearing width)
(type (or null array-index) next-start)
(type display display))
(with-display (display)
(do* ((wbuf (display-tbuf16 display))
(src-end (or end (length sequence)))
(src-start start (index+ src-start buf-end))
(end (index-min src-end (index+ src-start *buffer-text16-size*))
(index-min src-end (index+ src-start *buffer-text16-size*)))
(buf-end 0)
(new-font)
(font-ascent 0)
(font-descent 0)
(font-direction)
(stop-p nil))
((or stop-p (index>= src-start src-end))
(when (index< src-start src-end)
(setq next-start src-start)))
(declare (type buffer-text16 wbuf)
(type array-index src-start src-end end buf-end)
(type int16 font-ascent font-descent)
(type boolean stop-p))
;; Translate the text
(multiple-value-setq (buf-end new-font)
(funcall (or translate #'translate-default)
sequence src-start end font wbuf 0))
(setq buf-end (- buf-end src-start))
(cond ((null new-font) (setq stop-p t))
((integerp new-font) (incf width (the int32 new-font))))
(let (w a d l r)
(if (or (font-char-infos-internal font) (font-local-only-p font))
;; Calculate text extents locally
(progn
(multiple-value-setq (w a d l r)
(text-extents-local font wbuf 0 buf-end nil))
(setq font-ascent (the int16 (font-ascent font))
font-descent (the int16 (font-descent font))
font-direction (font-direction font)))
;; Let the server calculate text extents
(multiple-value-setq
(w a d l r font-ascent font-descent font-direction)
(text-extents-server font wbuf 0 buf-end)))
(incf width (the int32 w))
(cond ((index= src-start start)
(setq left-bearing (the int32 l))
(setq right-bearing (the int32 r))
(setq ascent (the int16 a))
(setq descent (the int16 d)))
(t
(setq left-bearing (the int32 (min left-bearing (the int32 l))))
(setq right-bearing (the int32 (max right-bearing (the int32 r))))
(setq ascent (the int16 (max ascent (the int16 a))))
(setq descent (the int16 (max descent (the int16 d)))))))
(when (type? new-font 'font)
(setq font new-font))
(setq overall-ascent (the int16 (max overall-ascent font-ascent)))
(setq overall-descent (the int16 (max overall-descent font-descent)))
(case overall-direction
(:unknown (setq overall-direction font-direction))
(:left-to-right (unless (eq font-direction :left-to-right)
(setq overall-direction nil)))
(:right-to-left (unless (eq font-direction :right-to-left)
(setq overall-direction nil))))))
(values width
ascent
descent
left-bearing
right-bearing
overall-ascent
overall-descent
overall-direction
next-start)))
(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 array-index start)
(type (or null array-index) end))
(declare (type (or null translation-function) translate)
#+clx-ansi-common-lisp
(dynamic-extent translate)
#+(and lispm (not clx-ansi-common-lisp))
(sys:downward-funarg #+Genera * #-Genera translate))
(declare (values integer (or null integer)))
(when (type? font 'gcontext)
(force-gcontext-changes font)
(setq font (gcontext-font font t)))
(check-type font font)
(let* ((width 0)
(next-start nil)
(display (font-display font)))
(declare (type int32 width)
(type (or null array-index) next-start)
(type display display))
(with-display (display)
(do* ((wbuf (display-tbuf16 display))
(src-end (or end (length sequence)))
(src-start start (index+ src-start buf-end))
(end (index-min src-end (index+ src-start *buffer-text16-size*))
(index-min src-end (index+ src-start *buffer-text16-size*)))
(buf-end 0)
(new-font)
(stop-p nil))
((or stop-p (index>= src-start src-end))
(when (index< src-start src-end)
(setq next-start src-start)))
(declare (type buffer-text16 wbuf)
(type array-index src-start src-end end buf-end)
(type boolean stop-p))
;; Translate the text
(multiple-value-setq (buf-end new-font)
(funcall (or translate #'translate-default)
sequence src-start end font wbuf 0))
(setq buf-end (- buf-end src-start))
(cond ((null new-font) (setq stop-p t))
((integerp new-font) (incf width (the int32 new-font))))
(incf width
(if (or (font-char-infos-internal font) (font-local-only-p font))
(text-extents-local font wbuf 0 buf-end :width-only)
(text-width-server font wbuf 0 buf-end)))
(when (type? new-font 'font)
(setq font new-font))))
(values width next-start)))
(defun text-extents-server (font string start end)
(declare (type font font)
(type string string)
(type array-index start end))
(declare (values width ascent descent left right font-ascent font-descent direction))
(let ((display (font-display font))
(length (index- end start))
(font-id (font-id font)))
(declare (type display display)
(type array-index length)
(type resource-id font-id))
(with-buffer-request-and-reply (display *x-querytextextents* 28 :sizes (8 16 32))
(((data boolean) (oddp length))
(length (index+ (index-ceiling length 2) 2))
(resource-id font-id)
((sequence :format char2b :start start :end end :appending t)
string))
(values
(integer-get 16)
(int16-get 12)
(int16-get 14)
(integer-get 20)
(integer-get 24)
(int16-get 8)
(int16-get 10)
(member8-get 1 :left-to-right :right-to-left)))))
(defun text-width-server (font string start end)
(declare (type (or font gcontext) font)
(type string string)
(type array-index start end))
(declare (values integer))
(let ((display (font-display font))
(length (index- end start))
(font-id (font-id font)))
(declare (type display display)
(type array-index length)
(type resource-id font-id))
(with-buffer-request-and-reply (display *x-querytextextents* 28 :sizes 32)
(((data boolean) (oddp length))
(length (index+ (index-ceiling length 2) 2))
(resource-id font-id)
((sequence :format char2b :start start :end end :appending t)
string))
(values (integer-get 16)))))
(defun text-extents-local (font sequence start end width-only-p)
(declare (type font font)
(type sequence sequence)
(type integer start end)
(type boolean width-only-p))
(declare (values width ascent descent overall-left overall-right))
(let* ((char-infos (font-char-infos font))
(font-info (font-font-info font)))
(declare (type font-info font-info))
(declare (type (simple-array int16 (*)) char-infos)
(array-register char-infos))
(if (zerop (length char-infos))
;; Fixed width font
(let* ((font-width (max-char-width font))
(font-ascent (max-char-ascent font))
(font-descent (max-char-descent font))
(width (* (index- end start) font-width)))
(declare (type int16 font-width font-ascent font-descent)
(type int32 width))
(if width-only-p
width
(values width
font-ascent
font-descent
(max-char-left-bearing font)
(+ width (- font-width) (max-char-right-bearing font)))))
;; Variable-width font
(let* ((first-col (font-info-min-byte2 font-info))
(num-cols (1+ (- (font-info-max-byte2 font-info) first-col)))
(first-row (font-info-min-byte1 font-info))
(last-row (font-info-max-byte1 font-info))
(num-rows (1+ (- last-row first-row))))
(declare (type card8 first-col first-row last-row)
(type card16 num-cols num-rows))
(if (or (plusp first-row) (plusp last-row))
;; Matrix (16 bit) font
(macrolet ((char-info-elt (sequence elt)
`(let* ((char (the card16 (elt ,sequence ,elt)))
(row (- (ash char -8) first-row))
(col (- (logand char #xff) first-col)))
(declare (type card16 char)
(type int16 row col))
(if (and (< -1 row num-rows) (< -1 col num-cols))
(index* 6 (index+ (index* row num-cols) col))
-1))))
(if width-only-p
(do ((i start (index1+ i))
(width 0))
((index>= i end) width)
(declare (type array-index i)
(type int32 width))
(let ((n (char-info-elt sequence i)))
(declare (type fixnum n))
(unless (minusp n) ;; Ignore characters not in the font
(incf width (the int16 (aref char-infos (index+ 2 n)))))))
;; extents
(do ((i start (index1+ i))
(width 0)
(ascent #x-7fff)
(descent #x-7fff)
(left #x7fff)
(right #x-7fff))
((index>= i end)
(values width ascent descent left right))
(declare (type array-index i)
(type int16 ascent descent)
(type int32 width left right))
(let ((n (char-info-elt sequence i)))
(declare (type fixnum n))
(unless (minusp n) ;; Ignore characters not in the font
(setq left (min left (+ width (aref char-infos n))))
(setq right (max right (+ width (aref char-infos (index1+ n)))))
(incf width (aref char-infos (index+ 2 n)))
(setq ascent (max ascent (aref char-infos (index+ 3 n))))
(setq descent (max descent (aref char-infos (index+ 4 n)))))))))
;; Non-matrix (8 bit) font
;; The code here is identical to the above, except for the following macro:
(macrolet ((char-info-elt (sequence elt)
`(let ((col (- (the card16 (elt ,sequence ,elt)) first-col)))
(declare (type int16 col))
(if (< -1 col num-cols)
(index* 6 col)
-1))))
(if width-only-p
(do ((i start (index1+ i))
(width 0))
((index>= i end) width)
(declare (type array-index i)
(type int32 width))
(let ((n (char-info-elt sequence i)))
(declare (type fixnum n))
(unless (minusp n) ;; Ignore characters not in the font
(incf width (the int16 (aref char-infos (index+ 2 n)))))))
;; extents
(do ((i start (index1+ i))
(width 0)
(ascent #x-7fff)
(descent #x-7fff)
(left #x7fff)
(right #x-7fff))
((index>= i end)
(values width ascent descent left right))
(declare (type array-index i)
(type int16 ascent descent)
(type int32 width left right))
(let ((n (char-info-elt sequence i)))
(declare (type fixnum n))
(unless (minusp n) ;; Ignore characters not in the font
(setq left (min left (+ width (aref char-infos n))))
(setq right (max right (+ width (aref char-infos (index1+ n)))))
(incf width (aref char-infos (index+ 2 n)))
(setq ascent (max ascent (aref char-infos (index+ 3 n))))
(setq descent (max descent (aref char-infos (index+ 4 n)))))
))))
)))))
;;-----------------------------------------------------------------------------
;; 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 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 (or null int32) width)
(type index-size size))
(declare (type (or null translation-function) translate)
#+clx-ansi-common-lisp
(dynamic-extent translate)
#+(and lispm (not clx-ansi-common-lisp))
(sys:downward-funarg #+Genera * #-Genera translate))
(declare (values boolean (or null int32)))
(let* ((display (gcontext-display gcontext))
(result t)
(opcode *x-polytext8*))
(declare (type display display))
(let ((vector (allocate-gcontext-state)))
(declare (type gcontext-state vector))
(setf (aref vector 0) elt)
(multiple-value-bind (new-start new-font translate-width)
(funcall (or translate #'translate-default)
vector 0 1 (gcontext-font gcontext t) vector 1)
;; Allow translate to set a new font
(when (type? new-font 'font)
(setf (gcontext-font gcontext) new-font)
(multiple-value-setq (new-start new-font translate-width)
(funcall translate vector 0 1 new-font vector 1)))
;; If new-start is zero, translate refuses to output it
(setq result (index-plusp new-start)
elt (aref vector 1))
(deallocate-gcontext-state vector)
(when translate-width (setq width translate-width))))
(when result
(when (eql size 16)
(setq opcode *x-polytext16*)
(setq elt (dpb elt (byte 8 8) (ldb (byte 8 8) elt))))
(with-buffer-request (display opcode :gc-force gcontext)
(drawable drawable)
(gcontext gcontext)
(int16 x y)
(card8 1 0)
(card8 (ldb (byte 8 0) elt))
(card8 (ldb (byte 8 8) elt)))
(values t width))))
#+(and allegro (version>= 8 2))
(excl:defun-proto
draw-glyphs8 (drawable gcontext x y sequence start end translate width)
(declare (type drawable drawable)
(type gcontext gcontext)
(type int16 x y)
(type array-index start)
(type sequence sequence)
(type (or null array-index) end)
(type (or null int32) width))
(declare (values (or null array-index) (or null int32)))
(declare (type translation-function translate)
#+clx-ansi-common-lisp
(dynamic-extent translate)
#+(and lispm (not clx-ansi-common-lisp))
(sys:downward-funarg translate)) )
#+(and allegro (version>= 8 2))
(excl:defun-proto
draw-glyphs16 (drawable gcontext x y sequence start end translate width)
(declare (type drawable drawable)
(type gcontext gcontext)
(type int16 x y)
(type array-index start)
(type sequence sequence)
(type (or null array-index) end)
(type (or null int32) width))
(declare (values (or null array-index) (or null int32)))
(declare (type translation-function translate)
#+clx-ansi-common-lisp
(dynamic-extent translate)
#+(and lispm (not clx-ansi-common-lisp))
(sys:downward-funarg translate)))
#+(and allegro (version>= 8 2))
(excl:defun-proto
draw-image-glyphs8 (drawable gcontext x y sequence start end translate width)
(declare (type drawable drawable)
(type gcontext gcontext)
(type int16 x y)
(type array-index start)
(type sequence sequence)
(type (or null array-index) end)
(type (or null int32) width))
(declare (type (or null translation-function) translate)
#+clx-ansi-common-lisp
(dynamic-extent translate)
#+(and lispm (not clx-ansi-common-lisp))
(sys:downward-funarg translate))
(declare (values (or null array-index) (or null int32))))
#+(and allegro (version>= 8 2))
(excl:defun-proto
draw-image-glyphs16 (drawable gcontext x y sequence start end translate width)
(declare (type drawable drawable)
(type gcontext gcontext)
(type int16 x y)
(type array-index start)
(type sequence sequence)
(type (or null array-index) end)
(type (or null int32) width))
(declare (type (or null translation-function) translate)
#+clx-ansi-common-lisp
(dynamic-extent translate)
#+(and lispm (not clx-ansi-common-lisp))
(sys:downward-funarg translate))
(declare (values (or null array-index) (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 array-index start)
(type sequence sequence)
(type (or null array-index) end)
(type (or null int32) width)
(type index-size size))
(declare (type (or null translation-function) translate)
#+clx-ansi-common-lisp
(dynamic-extent translate)
#+(and lispm (not clx-ansi-common-lisp))
(sys:downward-funarg #+Genera * #-Genera translate))
(declare (values (or null array-index) (or null int32)))
(unless end (setq end (length sequence)))
(ecase size
((:default 8) (draw-glyphs8 drawable gcontext x y sequence start end
(or translate #'translate-default) width))
(16 (draw-glyphs16 drawable gcontext x y sequence start end
(or translate #'translate-default) width))))
(defun draw-glyphs8 (drawable gcontext x y sequence start end translate width)
;; 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 array-index start)
(type sequence sequence)
(type (or null array-index) end)
(type (or null int32) width))
(declare (values (or null array-index) (or null int32)))
(declare (type translation-function translate)
#+clx-ansi-common-lisp
(dynamic-extent translate)
#+(and lispm (not clx-ansi-common-lisp))
(sys:downward-funarg translate))
(let* ((src-start start)
(src-end (or end (length sequence)))
(next-start nil)
(length (index- src-end src-start))
(request-length (* length 2)) ; Leave lots of room for font shifts.
(display (gcontext-display gcontext))
;; Should metrics-p be T? Don't want to pass a NIL font into translate...
(font (gcontext-font gcontext t)))
(declare (type array-index src-start src-end length)
(type (or null array-index) next-start)
(type display display))
(with-buffer-request (display *x-polytext8* :gc-force gcontext :length request-length)
(drawable drawable)
(gcontext gcontext)
(int16 x y)
(progn
;; Don't let any flushes happen since we manually set the request
;; length when we're done.
(with-buffer-flush-inhibited (display)
(do* ((boffset (index+ buffer-boffset 16))
(src-chunk 0)
(dst-chunk 0)
(offset 0)
(overall-width 0)
(stop-p nil))
((or stop-p (zerop length))
;; Ensure terminated with zero bytes
(do ((end (the array-index (lround boffset))))
((index>= boffset end))
(setf (aref buffer-bbuf boffset) 0)
(index-incf boffset))
(length-put 2 (index-ash (index- boffset buffer-boffset) -2))
(setf (buffer-boffset display) boffset)
(unless (index-zerop length) (setq next-start src-start))
(when overall-width (setq width overall-width)))
(declare (type array-index src-chunk dst-chunk offset)
(type (or null int32) overall-width)
(type boolean stop-p))
(setq src-chunk (index-min length *max-string-size*))
(multiple-value-bind (new-start new-font translated-width)
(funcall translate
sequence src-start (index+ src-start src-chunk)
font buffer-bbuf (index+ boffset 2))
(setq dst-chunk (index- new-start src-start)
length (index- length dst-chunk)
src-start new-start)
(if translated-width
(when overall-width (incf overall-width translated-width))
(setq overall-width nil))
(when (index-plusp dst-chunk)
(setf (aref buffer-bbuf boffset) dst-chunk)
(setf (aref buffer-bbuf (index+ boffset 1)) offset)
(incf boffset (index+ dst-chunk 2)))
(setq offset 0)
(cond ((null new-font)
;; Don't stop if translate copied whole chunk
(unless (index= src-chunk dst-chunk)
(setq stop-p t)))
((integerp new-font) (setq offset new-font))
((type? new-font 'font)
(setq font new-font)
(let ((font-id (font-id font))
(buffer-boffset boffset))
(declare (type resource-id font-id)
(type array-index buffer-boffset))
;; This changes the gcontext font in the server
;; Update the gcontext cache (both local and server state)
(let ((local-state (gcontext-local-state gcontext))
(server-state (gcontext-server-state gcontext)))
(declare (type gcontext-state local-state server-state))
(#-allegro-pre-smp
without-interrupts
#+allegro-pre-smp
mp:with-sharable-lock ;;; bug20414
#+allegro-pre-smp
(:exclusive (gcontext-state-lock gcontext))
(setf (gcontext-internal-font-obj server-state) font
(gcontext-internal-font server-state) font-id)
(setf (gcontext-internal-font-obj local-state) font
(gcontext-internal-font local-state) font-id)))
(card8-put 0 #xff)
(card8-put 1 (ldb (byte 8 24) font-id))
(card8-put 2 (ldb (byte 8 16) font-id))
(card8-put 3 (ldb (byte 8 8) font-id))
(card8-put 4 (ldb (byte 8 0) font-id)))
(index-incf boffset 5)))
)))))
(values next-start width)))
;; NOTE: After the first font change by the TRANSLATE function, characters are no-longer
;; on 16bit boundaries and this function garbles the bytes.
(defun draw-glyphs16 (drawable gcontext x y sequence start end translate width)
;; 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 array-index start)
(type sequence sequence)
(type (or null array-index) end)
(type (or null int32) width))
(declare (values (or null array-index) (or null int32)))
(declare (type translation-function translate)
#+clx-ansi-common-lisp
(dynamic-extent translate)
#+(and lispm (not clx-ansi-common-lisp))
(sys:downward-funarg translate))
(let* ((src-start start)
(src-end (or end (length sequence)))
(next-start nil)
(length (index- src-end src-start))
(request-length (* length 3)) ; Leave lots of room for font shifts.
(display (gcontext-display gcontext))
;; Should metrics-p be T? Don't want to pass a NIL font into translate...
(font (gcontext-font gcontext t))
(buffer (display-tbuf16 display)))
(declare (type array-index src-start src-end length)
(type (or null array-index) next-start)
(type display display)
(type buffer-text16 buffer))
(with-buffer-request (display *x-polytext16* :gc-force gcontext :length request-length)
(drawable drawable)
(gcontext gcontext)
(int16 x y)
(progn
;; Don't let any flushes happen since we manually set the request
;; length when we're done.
(with-buffer-flush-inhibited (display)
(do* ((boffset (index+ buffer-boffset 16))
(src-chunk 0)
(dst-chunk 0)
(offset 0)
(overall-width 0)
(stop-p nil))
((or stop-p (zerop length))
;; Ensure terminated with zero bytes
(do ((end (lround boffset)))
((index>= boffset end))
(setf (aref buffer-bbuf boffset) 0)
(index-incf boffset))
(length-put 2 (index-ash (index- boffset buffer-boffset) -2))
(setf (buffer-boffset display) boffset)
(unless (zerop length) (setq next-start src-start))
(when overall-width (setq width overall-width)))
(declare (type array-index boffset src-chunk dst-chunk offset)
(type (or null int32) overall-width)
(type boolean stop-p))
(setq src-chunk (index-min length *max-string-size*))
(multiple-value-bind (new-start new-font translated-width)
(funcall translate
sequence src-start (index+ src-start src-chunk)
font buffer 0)
(setq dst-chunk (index- new-start src-start)
length (index- length dst-chunk)
src-start new-start)
(write-sequence-char2b display (index+ boffset 2) buffer 0 dst-chunk)
(if translated-width
(when overall-width (incf overall-width translated-width))
(setq overall-width nil))
(when (index-plusp dst-chunk)
(setf (aref buffer-bbuf boffset) dst-chunk)
(setf (aref buffer-bbuf (index+ boffset 1)) offset)
(index-incf boffset (index+ dst-chunk dst-chunk 2)))
(setq offset 0)
(cond ((null new-font)
;; Don't stop if translate copied whole chunk
(unless (index= src-chunk dst-chunk)
(setq stop-p t)))
((integerp new-font) (setq offset new-font))
((type? new-font 'font)
(setq font new-font)
(let ((font-id (font-id font))
(buffer-boffset boffset))
(declare (type resource-id font-id)
(type array-index buffer-boffset))
;; This changes the gcontext font in the SERVER
;; Update the gcontext cache (both local and server state)
(let ((local-state (gcontext-local-state gcontext))
(server-state (gcontext-server-state gcontext)))
(declare (type gcontext-state local-state server-state))
(#-allegro-pre-smp
without-interrupts
#+allegro-pre-smp
mp:with-exclusive-lock
#+allegro-pre-smp
((gcontext-state-lock gcontext))
(setf (gcontext-internal-font-obj server-state) font
(gcontext-internal-font server-state) font-id)
(setf (gcontext-internal-font-obj local-state) font
(gcontext-internal-font local-state) font-id)))
(card8-put 0 #xff)
(card8-put 1 (ldb (byte 8 24) font-id))
(card8-put 2 (ldb (byte 8 16) font-id))
(card8-put 3 (ldb (byte 8 8) font-id))
(card8-put 4 (ldb (byte 8 0) font-id)))
(index-incf boffset 5)))
)))))
(values next-start width)))
(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 (or null int32) width)
(type index-size size))
(declare (type (or null translation-function) translate)
#+clx-ansi-common-lisp
(dynamic-extent translate)
#+(and lispm (not clx-ansi-common-lisp))
(sys:downward-funarg #+Genera * #-Genera translate))
(declare (values boolean (or null int32)))
(let* ((display (gcontext-display gcontext))
(result t)
(opcode *x-imagetext8*))
(declare (type display display))
(let ((vector (allocate-gcontext-state)))
(declare (type gcontext-state vector))
(setf (aref vector 0) elt)
(multiple-value-bind (new-start new-font translate-width)
(funcall (or translate #'translate-default)
vector 0 1 (gcontext-font gcontext t) vector 1)
;; Allow translate to set a new font
(when (type? new-font 'font)
(setf (gcontext-font gcontext) new-font)
(multiple-value-setq (new-start new-font translate-width)
(funcall translate vector 0 1 new-font vector 1)))
;; If new-start is zero, translate refuses to output it
(setq result (index-plusp new-start)
elt (aref vector 1))
(deallocate-gcontext-state vector)
(when translate-width (setq width translate-width))))
(when result
(when (eql size 16)
(setq opcode *x-imagetext16*)
(setq elt (dpb elt (byte 8 8) (ldb (byte 8 8) elt))))
(with-buffer-request (display opcode :gc-force gcontext)
(drawable drawable)
(gcontext gcontext)
(data 1) ;; 1 character
(int16 x y)
(card8 (ldb (byte 8 0) elt))
(card8 (ldb (byte 8 8) elt)))
(values t width))))
(defun draw-image-glyphs (drawable gcontext x y sequence
&key (start 0) end translate width (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 array-index start)
(type (or null array-index) end)
(type sequence sequence)
(type (or null int32) width)
(type index-size size))
(declare (type (or null translation-function) translate)
#+clx-ansi-common-lisp
(dynamic-extent translate)
#+(and lispm (not clx-ansi-common-lisp))
(sys:downward-funarg #+Genera * #-Genera translate))
(declare (values (or null array-index) (or null int32)))
(setf end (index-min (index+ start 255) (or end (length sequence))))
(ecase size
((:default 8)
(draw-image-glyphs8 drawable gcontext x y sequence start end translate width))
(16
(draw-image-glyphs16 drawable gcontext x y sequence start end translate width))))
(defun draw-image-glyphs8 (drawable gcontext x y sequence start end translate width)
;; 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 array-index start)
(type sequence sequence)
(type (or null array-index) end)
(type (or null int32) width))
(declare (type (or null translation-function) translate)
#+clx-ansi-common-lisp
(dynamic-extent translate)
#+(and lispm (not clx-ansi-common-lisp))
(sys:downward-funarg translate))
(declare (values (or null array-index) (or null int32)))
(do* ((display (gcontext-display gcontext))
(length (index- end start))
;; Should metrics-p be T? Don't want to pass a NIL font into translate...
(font (gcontext-font gcontext t))
(font-change nil)
(new-start) (translated-width) (chunk))
(nil) ;; forever
(declare (type display display)
(type array-index length)
(type (or null array-index) new-start chunk))
(when font-change
(setf (gcontext-font gcontext) font))
(block change-font
(with-buffer-request (display *x-imagetext8* :gc-force gcontext :length length)
(drawable drawable)
(gcontext gcontext)
(int16 x y)
(progn
;; Don't let any flushes happen since we manually set the request
;; length when we're done.
(with-buffer-flush-inhibited (display)
;; Translate the sequence into the buffer
(multiple-value-setq (new-start font translated-width)
(funcall (or translate #'translate-default) sequence start end
font buffer-bbuf (index+ buffer-boffset 16)))
;; Number of glyphs translated
(setq chunk (index- new-start start))
;; Check for initial font change
(when (and (index-zerop chunk) (type? font 'font))
(setq font-change t) ;; Loop around changing font
(return-from change-font))
;; Quit when nothing translated
(when (index-zerop chunk)
(return-from draw-image-glyphs8 new-start))
;; Update buffer pointers
(data-put 1 chunk)
(let ((blen (lround (index+ 16 chunk))))
(length-put 2 (index-ash blen -2))
(setf (buffer-boffset display) (index+ buffer-boffset blen))))))
;; Normal exit
(return-from draw-image-glyphs8
(values (if (index= chunk length) nil new-start)
(or translated-width width))))))
(defun draw-image-glyphs16 (drawable gcontext x y sequence start end translate width)
;; 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 array-index start)
(type sequence sequence)
(type (or null array-index) end)
(type (or null int32) width))
(declare (type (or null translation-function) translate)
#+clx-ansi-common-lisp
(dynamic-extent translate)
#+(and lispm (not clx-ansi-common-lisp))
(sys:downward-funarg translate))
(declare (values (or null array-index) (or null int32)))
(do* ((display (gcontext-display gcontext))
(length (index- end start))
;; Should metrics-p be T? Don't want to pass a NIL font into translate...
(font (gcontext-font gcontext t))
(font-change nil)
(new-start) (translated-width) (chunk)
(buffer (buffer-tbuf16 display)))
(nil) ;; forever
(declare (type display display)
(type array-index length)
(type (or null array-index) new-start chunk)
(type buffer-text16 buffer))
(when font-change
(setf (gcontext-font gcontext) font))
(block change-font
(with-buffer-request (display *x-imagetext16* :gc-force gcontext :length length)
(drawable drawable)
(gcontext gcontext)
(int16 x y)
(progn