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graphics.lisp
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;;; -*- Mode: Lisp; Package: CLIM-INTERNALS -*-
;;; (c) copyright 1998,1999,2000,2001 by Michael McDonald ([email protected])
;;; (c) copyright 2001 by Arnaud Rouanet ([email protected])
;;; This library is free software; you can redistribute it and/or
;;; modify it under the terms of the GNU Library General Public
;;; License as published by the Free Software Foundation; either
;;; version 2 of the License, or (at your option) any later version.
;;;
;;; This library is distributed in the hope that it will be useful,
;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
;;; Library General Public License for more details.
;;;
;;; You should have received a copy of the GNU Library General Public
;;; License along with this library; if not, write to the
;;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
;;; Boston, MA 02111-1307 USA.
(in-package :clim-internals)
;;; Work in progress that reduces consing of rest arguments and keyword
;;; processing.
(defmacro with-medium-and-options ((sheet
&key ink clipping-region transformation
line-unit line-thickness
line-style line-style-p
line-dashes dashes-p
line-joint-shape line-cap-shape
text-style text-style-p
text-family text-family-p
text-face text-face-p
text-size text-size-p)
(medium)
&body body)
(with-gensyms (continuation sheet-medium)
`(flet ((,continuation (,medium)
,@body))
(declare (dynamic-extent #',continuation))
(with-sheet-medium (,sheet-medium ,sheet)
(do-graphics-with-options-internal-1
,sheet-medium #'continuation
,ink ,clipping-region ,transformation
,line-unit ,line-thickness
,line-style ,line-style-p
,line-dashes ,dashes-p
,line-joint-shape ,line-cap-shape
,text-style ,text-style-p
,text-family ,text-family-p
,text-face ,text-face-p
,text-size ,text-size-p))))
)
(defmethod do-graphics-with-options ((sheet sheet) func &rest options)
(with-sheet-medium (medium sheet)
(apply #'do-graphics-with-options-internal medium sheet func options)))
(defmethod do-graphics-with-options ((medium medium) func &rest options)
(apply #'do-graphics-with-options-internal medium medium func options))
(defmethod do-graphics-with-options ((sheet t) func &rest options)
(declare (ignore options))
(if sheet
(funcall func sheet)))
(defmethod do-graphics-with-options ((pixmap pixmap) func &rest options)
(with-pixmap-medium (medium pixmap)
(apply #'do-graphics-with-options-internal medium medium func options)))
(defmethod do-graphics-with-options-internal ((medium medium) orig-medium func
&rest args
&key ink clipping-region transformation
line-unit line-thickness
(line-style nil line-style-p)
(line-dashes nil dashes-p)
line-joint-shape line-cap-shape
(text-style nil text-style-p)
(text-family nil text-family-p)
(text-face nil text-face-p)
(text-size nil text-size-p)
&allow-other-keys)
(declare (ignore args))
(let ((old-ink (medium-ink medium))
(old-clip (medium-clipping-region medium))
(old-transform (medium-transformation medium))
(old-line-style (medium-line-style medium))
(old-text-style (medium-text-style medium))
(changed-line-style line-style-p)
(changed-text-style text-style-p))
(unwind-protect
(progn
(when (eq ink old-ink) (setf ink nil))
(when ink
(setf (medium-ink medium) ink))
(when transformation
(setf (medium-transformation medium)
(compose-transformations old-transform transformation)))
(when (and clipping-region old-clip
(or (eq clipping-region +everywhere+)
(eq clipping-region old-clip)
(region-contains-region-p clipping-region old-clip))
#+NIL (region-equal clipping-region old-clip))
(setf clipping-region nil))
(when clipping-region
(setf (medium-clipping-region medium)
(region-intersection (if transformation
(transform-region transformation old-clip)
old-clip)
clipping-region)))
(when (null line-style)
(setf line-style old-line-style))
(when (or line-unit line-thickness dashes-p line-joint-shape line-cap-shape)
(setf changed-line-style t)
(setf line-style (make-line-style
:unit (or line-unit
(line-style-unit line-style))
:thickness (or line-thickness
(line-style-thickness line-style))
:dashes (or line-dashes
(line-style-dashes line-style))
:joint-shape (or line-joint-shape
(line-style-joint-shape line-style))
:cap-shape (or line-cap-shape
(line-style-cap-shape line-style)))))
(when changed-line-style
(setf (medium-line-style medium) line-style))
(if text-style-p
(setf text-style (merge-text-styles text-style
(medium-merged-text-style medium)))
(setf text-style (medium-merged-text-style medium)))
(when (or text-family-p text-face-p text-size-p)
(setf changed-text-style t)
(setf text-style (merge-text-styles (make-text-style text-family
text-face
text-size)
text-style)))
(when changed-text-style
(setf (medium-text-style medium) text-style))
(when orig-medium
(funcall func orig-medium)))
(when ink
(setf (medium-ink medium) old-ink))
;; First set transformation, then clipping!
(when transformation
(setf (medium-transformation medium) old-transform))
(when clipping-region
(setf (medium-clipping-region medium) old-clip))
(when changed-line-style
(setf (medium-line-style medium) old-line-style))
(when changed-text-style
(setf (medium-text-style medium) old-text-style)))))
(defmacro with-medium-options ((sheet args)
&body body)
`(flet ((graphics-op (medium)
(declare (ignorable medium))
,@body))
#-clisp (declare (dynamic-extent #'graphics-op))
(apply #'do-graphics-with-options ,sheet #'graphics-op ,args)))
(defmacro with-drawing-options ((medium &rest drawing-options) &body body)
(setq medium (stream-designator-symbol medium '*standard-output*))
(with-gensyms (gcontinuation cont-arg)
`(flet ((,gcontinuation (,cont-arg)
(declare (ignore ,cont-arg))
,@body))
#-clisp (declare (dynamic-extent #',gcontinuation))
(apply #'invoke-with-drawing-options
,medium #',gcontinuation (list ,@drawing-options)))))
(defmethod invoke-with-drawing-options ((medium medium) continuation
&rest drawing-options
&key ink transformation clipping-region
line-style text-style
&allow-other-keys)
(declare (ignore ink transformation clipping-region line-style text-style))
(with-medium-options (medium drawing-options)
(funcall continuation medium)))
(defmethod invoke-with-drawing-options ((sheet sheet) continuation &rest drawing-options)
(with-sheet-medium (medium sheet)
(with-medium-options (medium drawing-options)
(funcall continuation medium))))
;;; Compatibility with real CLIM
(defmethod invoke-with-drawing-options ((sheet t) continuation
&rest drawing-options)
(declare (ignore drawing-options))
(funcall continuation sheet))
(defmethod invoke-with-identity-transformation
((sheet sheet) continuation)
(with-sheet-medium (medium sheet)
(letf (((medium-transformation medium) +identity-transformation+))
(funcall continuation sheet))))
(defmethod invoke-with-identity-transformation
((destination pixmap) continuation)
(with-pixmap-medium (medium destination)
(letf (((medium-transformation medium) +identity-transformation+))
(funcall continuation destination))))
(defmethod invoke-with-identity-transformation
((medium medium) continuation)
(letf (((medium-transformation medium) +identity-transformation+))
(funcall continuation medium)))
(defmethod invoke-with-local-coordinates (medium cont x y)
;; For now we do as real CLIM does.
;; Default seems to be the cursor position.
;; Moore suggests we use (0,0) if medium is no stream.
;;
;; Further the specification is vague about possible scalings ...
;;
(unless (and x y)
(multiple-value-bind (cx cy) (if (extended-output-stream-p medium)
(stream-cursor-position medium)
(values 0 0))
(setf x (or x cx)
y (or y cy))))
(multiple-value-bind (mxx mxy myy myx tx ty)
(get-transformation (medium-transformation medium))
(declare (ignore tx ty))
(with-identity-transformation (medium)
(with-drawing-options
(medium :transformation (make-transformation
mxx mxy myy myx
x y))
(funcall cont medium)))))
(defmethod invoke-with-first-quadrant-coordinates (medium cont x y)
;; First we do the same as invoke-with-local-coordinates but rotate and
;; deskew it so that it becomes first-quadrant. We do this
;; by simply measuring the length of the transfomed x and y "unit vectors".
;; [That is (0,0)-(1,0) and (0,0)-(0,1)] and setting up a transformation
;; which features an upward pointing y-axis and a right pointing x-axis with
;; a length equal to above measured vectors.
(unless (and x y)
(multiple-value-bind (cx cy) (if (extended-output-stream-p medium)
(stream-cursor-position medium)
(values 0 0))
(setf x (or x cx)
y (or y cy))))
(let* ((tr (medium-transformation medium))
(xlen
(multiple-value-bind (dx dy) (transform-distance tr 1 0)
(sqrt (+ (expt dx 2) (expt dy 2)))))
(ylen
(multiple-value-bind (dx dy) (transform-distance tr 0 1)
(sqrt (+ (expt dx 2) (expt dy 2))))))
(with-identity-transformation (medium)
(with-drawing-options
(medium :transformation (make-transformation
xlen 0 0 (- ylen)
x y))
(funcall cont medium)))))
(defun draw-point (sheet point
&rest args
&key ink clipping-region transformation
line-style line-thickness line-unit)
(declare (ignore ink clipping-region transformation
line-style line-thickness line-unit))
(with-medium-options (sheet args)
(multiple-value-bind (x y) (point-position point)
(medium-draw-point* medium x y))))
(defun draw-point* (sheet x y
&rest args
&key ink clipping-region transformation
line-style line-thickness line-unit)
(declare (ignore ink clipping-region transformation
line-style line-thickness line-unit))
(with-medium-options (sheet args)
(medium-draw-point* medium x y)))
(defun expand-point-seq (point-seq)
(let ((coord-seq nil))
(do-sequence (point point-seq)
(multiple-value-bind (x y) (point-position point)
(setq coord-seq (list* y x coord-seq))))
(nreverse coord-seq)))
(defun draw-points (sheet point-seq
&rest args
&key ink clipping-region transformation
line-style line-thickness line-unit)
(declare (ignore ink clipping-region transformation
line-style line-thickness line-unit))
(with-medium-options (sheet args)
(medium-draw-points* medium (expand-point-seq point-seq))))
(defun draw-points* (sheet coord-seq
&rest args
&key ink clipping-region transformation
line-style line-thickness line-unit)
(declare (ignore ink clipping-region transformation
line-style line-thickness line-unit))
(with-medium-options (sheet args)
(medium-draw-points* medium coord-seq)))
(defun draw-line (sheet point1 point2
&rest args
&key ink clipping-region transformation line-style line-thickness
line-unit line-dashes line-cap-shape)
(declare (ignore ink clipping-region transformation line-style line-thickness
line-unit line-dashes line-cap-shape))
(with-medium-options (sheet args)
(multiple-value-bind (x1 y1) (point-position point1)
(multiple-value-bind (x2 y2) (point-position point2)
(medium-draw-line* medium x1 y1 x2 y2)))))
(defun draw-line* (sheet x1 y1 x2 y2
&rest args
&key ink clipping-region transformation line-style line-thickness
line-unit line-dashes line-cap-shape)
(declare (ignore ink clipping-region transformation line-style line-thickness
line-unit line-dashes line-cap-shape))
(with-medium-options (sheet args)
(medium-draw-line* medium x1 y1 x2 y2)))
(defun draw-lines (sheet point-seq
&rest args
&key ink clipping-region transformation line-style line-thickness
line-unit line-dashes line-cap-shape)
(declare (ignore ink clipping-region transformation line-style line-thickness
line-unit line-dashes line-cap-shape))
(with-medium-options (sheet args)
(medium-draw-lines* medium (expand-point-seq point-seq))))
(defun draw-lines* (sheet coord-seq
&rest args
&key ink clipping-region transformation line-style line-thickness
line-unit line-dashes line-cap-shape)
(declare (ignore ink clipping-region transformation line-style line-thickness
line-unit line-dashes line-cap-shape))
(with-medium-options (sheet args)
(medium-draw-lines* medium coord-seq)))
(defun draw-polygon (sheet point-seq
&rest args
&key (filled t) (closed t)
ink clipping-region transformation line-style line-thickness
line-unit line-dashes line-joint-shape line-cap-shape)
(declare (ignore ink clipping-region transformation line-style line-thickness
line-unit line-dashes line-joint-shape line-cap-shape))
(with-medium-options (sheet args)
(medium-draw-polygon* medium (expand-point-seq point-seq) closed filled)))
(defun draw-polygon* (sheet coord-seq
&rest args
&key (filled t) (closed t)
ink clipping-region transformation line-style line-thickness
line-unit line-dashes line-joint-shape line-cap-shape)
(declare (ignore ink clipping-region transformation line-style line-thickness
line-unit line-dashes line-joint-shape line-cap-shape))
(with-medium-options (sheet args)
(medium-draw-polygon* medium coord-seq closed filled)))
(defun draw-rectangle (sheet point1 point2
&rest args
&key (filled t)
ink clipping-region transformation line-style line-thickness
line-unit line-dashes line-joint-shape)
(declare (ignore ink clipping-region transformation line-style line-thickness
line-unit line-dashes line-joint-shape))
(with-medium-options (sheet args)
(multiple-value-bind (x1 y1) (point-position point1)
(multiple-value-bind (x2 y2) (point-position point2)
(medium-draw-rectangle* medium x1 y1 x2 y2 filled)))))
(defun draw-rectangle* (sheet x1 y1 x2 y2
&rest args
&key (filled t)
ink clipping-region transformation line-style line-thickness
line-unit line-dashes line-joint-shape)
(declare (ignore ink clipping-region transformation line-style line-thickness
line-unit line-dashes line-joint-shape))
(with-medium-options (sheet args)
(medium-draw-rectangle* medium x1 y1 x2 y2 filled)))
(defun draw-rectangles (sheet points
&rest args
&key (filled t)
ink clipping-region transformation line-style line-thickness
line-unit line-dashes line-joint-shape)
(declare (ignore ink clipping-region transformation line-style line-thickness
line-unit line-dashes line-joint-shape))
(with-medium-options (sheet args)
(loop for point in points
nconcing (multiple-value-bind (x y) (point-position point)
(list x y)) into position-seq
finally (medium-draw-rectangles* medium position-seq filled))))
(defun draw-rectangles* (sheet position-seq
&rest args
&key (filled t)
ink clipping-region transformation line-style line-thickness
line-unit line-dashes line-joint-shape)
(declare (ignore ink clipping-region transformation line-style line-thickness
line-unit line-dashes line-joint-shape))
(with-medium-options (sheet args)
(medium-draw-rectangles* medium position-seq filled)))
(defun draw-triangle (sheet point1 point2 point3
&rest args
&key (filled t)
ink clipping-region transformation line-style line-thickness
line-unit line-dashes line-joint-shape)
(declare (ignore ink clipping-region transformation line-style line-thickness
line-unit line-dashes line-joint-shape))
(apply #'draw-polygon sheet (list point1 point2 point3) :filled filled :closed t args))
(defun draw-triangle* (sheet x1 y1 x2 y2 x3 y3
&rest args
&key (filled t)
ink clipping-region transformation line-style line-thickness
line-unit line-dashes line-joint-shape)
(declare (ignore ink clipping-region transformation line-style line-thickness
line-unit line-dashes line-joint-shape))
(apply #'draw-polygon* sheet (list x1 y1 x2 y2 x3 y3) :filled filled :closed t args))
(defun draw-ellipse (sheet
center-point
radius-1-dx radius-1-dy radius-2-dx radius-2-dy
&rest args
&key (filled t) (start-angle 0.0) (end-angle (* 2.0 pi))
ink clipping-region transformation
line-style line-thickness line-unit line-dashes line-cap-shape)
(declare (ignore ink clipping-region transformation line-style line-thickness
line-unit line-dashes line-cap-shape))
(with-medium-options (sheet args)
(multiple-value-bind (center-x center-y) (point-position center-point)
(medium-draw-ellipse* medium
center-x center-y
radius-1-dx radius-1-dy radius-2-dx radius-2-dy
start-angle end-angle filled))))
(defun draw-ellipse* (sheet
center-x center-y
radius-1-dx radius-1-dy radius-2-dx radius-2-dy
&rest args
&key (filled t) (start-angle 0.0) (end-angle (* 2.0 pi))
ink clipping-region transformation
line-style line-thickness line-unit line-dashes line-cap-shape)
(declare (ignore ink clipping-region transformation line-style line-thickness
line-unit line-dashes line-cap-shape))
(with-medium-options (sheet args)
(medium-draw-ellipse* medium
center-x center-y
radius-1-dx radius-1-dy radius-2-dx radius-2-dy
start-angle end-angle filled)))
(defun draw-circle (sheet
center-point radius
&rest args
&key (filled t) (start-angle 0.0) (end-angle (* 2.0 pi))
ink clipping-region transformation
line-style line-thickness line-unit line-dashes line-cap-shape)
(declare (ignore ink clipping-region transformation line-style line-thickness
line-unit line-dashes line-cap-shape))
(with-medium-options (sheet args)
(multiple-value-bind (center-x center-y) (point-position center-point)
(medium-draw-ellipse* medium
center-x center-y
radius 0 0 radius
start-angle end-angle filled))))
(defun draw-circle* (sheet
center-x center-y radius
&rest args
&key (filled t) (start-angle 0.0) (end-angle (* 2.0 pi))
ink clipping-region transformation
line-style line-thickness line-unit line-dashes line-cap-shape)
(declare (ignore ink clipping-region transformation line-style line-thickness
line-unit line-dashes line-cap-shape))
(with-medium-options (sheet args)
(medium-draw-ellipse* medium
center-x center-y
radius 0 0 radius
start-angle end-angle filled)))
(defun draw-text (sheet string point
&rest args
&key (start 0) (end nil)
(align-x :left) (align-y :baseline)
(toward-point nil toward-point-p)
transform-glyphs
ink clipping-region transformation
text-style text-family text-face text-size)
(declare (ignore ink clipping-region transformation
text-style text-family text-face text-size))
(with-medium-options (sheet args)
(multiple-value-bind (x y) (point-position point)
(multiple-value-bind (toward-x toward-y)
(if toward-point-p
(point-position toward-point)
(values (1+ x) y))
(medium-draw-text* medium string x y
start end
align-x align-y
toward-x toward-y transform-glyphs)))))
(defun draw-text* (sheet string x y
&rest args
&key (start 0) (end nil)
(align-x :left) (align-y :baseline)
(toward-x (1+ x)) (toward-y y) transform-glyphs
ink clipping-region transformation
text-style text-family text-face text-size)
(declare (ignore ink clipping-region transformation
text-style text-family text-face text-size))
(with-medium-options (sheet args)
(medium-draw-text* medium string x y
start end
align-x align-y
toward-x toward-y transform-glyphs)))
;; This function belong to the extensions package.
(defun draw-glyph (sheet string x y
&rest args
&key (align-x :left) (align-y :baseline)
toward-x toward-y transform-glyphs
ink clipping-region transformation
text-style text-family text-face text-size)
"Draws a single character of filled text represented by the given
element. element is a character or other object to be translated
into a font index. The given x and y specify the left baseline
position for the character."
(declare (ignore ink clipping-region transformation
text-style text-family text-face text-size))
(with-medium-options (sheet args)
(medium-draw-glyph medium string x y
align-x align-y
toward-x toward-y transform-glyphs)))
(defun draw-arrow (sheet point-1 point-2
&rest args
&key ink clipping-region transformation
line-style line-thickness
line-unit line-dashes line-cap-shape
(to-head t) from-head (head-length 10) (head-width 5))
(declare (ignore ink clipping-region transformation
line-style line-thickness
line-unit line-dashes line-cap-shape
to-head from-head head-length head-width))
(multiple-value-bind (x1 y1) (point-position point-1)
(multiple-value-bind (x2 y2) (point-position point-2)
(apply #'draw-arrow* sheet x1 y1 x2 y2 args))))
(defun draw-arrow* (sheet x1 y1 x2 y2
&rest args
&key ink clipping-region transformation
line-style line-thickness
line-unit line-dashes line-cap-shape
(to-head t) from-head (head-length 10) (head-width 5))
(declare (ignore ink clipping-region transformation
line-style line-thickness
line-unit line-dashes line-cap-shape))
(with-medium-options (sheet args)
(with-translation (sheet x2 y2)
(with-rotation (sheet (atan* (- x1 x2)
(- y1 y2)))
(let* ((end 0.0)
(start (sqrt (+ (expt (- x2 x1) 2)
(expt (- y2 y1) 2))))
(p end)
(q start)
(line-style (medium-line-style sheet))
;; FIXME: I believe this thickness is in "line-style-units",
;; which are only coincidentally the same as pixel coorindates
;; on screen backends, using :normal units. There is no function
;; documented for converting the units to stream coordinates.
(thickness (multiple-value-bind (dx dy)
(transform-distance (invert-transformation (medium-transformation sheet))
(line-style-thickness line-style)
0)
(sqrt (+ (* dx dx) (* dy dy)))))
(width/2 (/ head-width 2))
(a (atan (/ width/2 head-length)))
(offset (if (and head-length (not (zerop head-length)))
(/ thickness (* 2 (sin a )))
0.0))
(tip-to-peak (+ head-length offset (- (* thickness 0.5 (sin a)))))) ;; okay, a guess..
(when to-head (incf p offset))
(when from-head (decf q offset))
(if (and to-head
from-head
(< (abs (- start end)) (* 2 tip-to-peak)))
(let ((width (* 0.5 (+ head-width thickness)
(/ (abs (- start end))
(* 2 tip-to-peak)) )))
(draw-polygon* sheet
(list end 0
(/ start 2) width
start 0
(/ start 2) (- width))
:filled t
:line-thickness 0))
(progn
(when to-head
(draw-polygon* sheet
(list (+ p head-length) (- width/2)
p 0
(+ p head-length) width/2)
:filled nil
:closed nil))
(when from-head
(draw-polygon* sheet
(list (- q head-length) (- width/2)
q 0
(- q head-length) width/2)
:filled nil
:closed nil))
(unless (< q p)
(draw-line* sheet q 0 p 0)))) )))))
(defun draw-oval (sheet center-pt x-radius y-radius
&rest args
&key (filled t) ink clipping-region transformation
line-style line-thickness line-unit line-dashes line-cap-shape)
(declare (ignore filled ink clipping-region transformation
line-style line-thickness
line-unit line-dashes line-cap-shape))
(multiple-value-bind (x1 y1) (point-position center-pt)
(apply #'draw-oval* sheet x1 y1 x-radius y-radius args)))
(defun draw-oval* (sheet center-x center-y x-radius y-radius
&rest args
&key (filled t) ink clipping-region transformation
line-style line-thickness line-unit line-dashes line-cap-shape)
(declare (ignore ink clipping-region transformation
line-style line-thickness
line-unit line-dashes line-cap-shape))
(check-type x-radius (real 0))
(check-type y-radius (real 0))
(if (or (coordinate= x-radius 0) (coordinate= y-radius 0))
(draw-circle* sheet center-x center-y (max x-radius y-radius)
:filled filled)
(with-medium-options (sheet args)
(if (coordinate<= y-radius x-radius)
(let ((x1 (- center-x x-radius)) (x2 (+ center-x x-radius))
(y1 (- center-y y-radius)) (y2 (+ center-y y-radius)))
(if filled
;; Kludge coordinates, sometimes due to rounding the lines don't connect.
(draw-rectangle* sheet (floor x1) y1 (ceiling x2) y2)
(draw-lines* sheet (list (floor x1) y1 (ceiling x2) y1
(floor x1) y2 (ceiling x2) y2)))
(draw-circle* sheet x1 center-y y-radius
:filled filled
:start-angle (* pi 0.5)
:end-angle (* pi 1.5))
(draw-circle* sheet x2 center-y y-radius
:filled filled
:start-angle (* pi 1.5)
:end-angle (* pi 2.5)))
(with-rotation (sheet (/ pi 2) (make-point center-x center-y))
(draw-oval* sheet center-x center-y y-radius x-radius
:filled filled)) ))))
;;; Pixmap functions
(defmethod copy-to-pixmap ((medium medium) medium-x medium-y width height
&optional pixmap (pixmap-x 0) (pixmap-y 0))
(unless pixmap
(setq pixmap (allocate-pixmap medium (+ pixmap-x width) (+ pixmap-y height))))
(medium-copy-area medium medium-x medium-y width height
pixmap pixmap-x pixmap-y)
pixmap)
(defmethod copy-to-pixmap ((sheet sheet) sheet-x sheet-y width height
&optional pixmap (pixmap-x 0) (pixmap-y 0))
(copy-to-pixmap (sheet-medium sheet) sheet-x sheet-y width height
pixmap pixmap-x pixmap-y))
(defmethod copy-from-pixmap (pixmap pixmap-x pixmap-y width height
(medium medium) medium-x medium-y)
(medium-copy-area pixmap pixmap-x pixmap-y width height
medium medium-x medium-y)
pixmap)
(defmethod copy-from-pixmap (pixmap pixmap-x pixmap-y width height
(sheet sheet) sheet-x sheet-y)
(medium-copy-area pixmap pixmap-x pixmap-y width height
(sheet-medium sheet) sheet-x sheet-y))
(defmethod copy-area ((medium medium) from-x from-y width height to-x to-y)
(medium-copy-area medium from-x from-y width height
medium to-x to-y))
(defmethod copy-area ((sheet sheet) from-x from-y width height to-x to-y)
(copy-area (sheet-medium sheet) from-x from-y width height to-x to-y))
(defmethod copy-area ((stream stream) from-x from-y width height to-x to-y)
(if (sheetp stream)
(copy-area (sheet-medium stream) from-x from-y width height to-x to-y)
(error "COPY-AREA on a stream is not implemented")))
;;; XXX The modification of the sheet argument to hold the pixmap medium seems
;;; completely incorrect here; the description of the macro in the spec says
;;; nothing about that. On the other hand, the spec talks about "medium-var"
;;; when that is clearly meant to be a stream (and an output-recording stream
;;; at that, if the example in the Franz user guide is to be believed). What a
;;; mess. I think we need a pixmap output recording stream in order to do this
;;; right. -- moore
(defmacro with-output-to-pixmap ((medium-var sheet &key width height) &body body)
(if (and width height)
`(let* ((pixmap (allocate-pixmap ,sheet ,width ,height))
(,medium-var (make-medium (port ,sheet) pixmap))
(old-medium (sheet-medium ,sheet)))
(setf (slot-value pixmap 'medium) ,medium-var) ; hmm, [seems to work] -- BTS
(setf (%sheet-medium ,sheet) ,medium-var) ;is sheet a sheet-with-medium-mixin? --GB
(unwind-protect
(progn ,@body)
(setf (%sheet-medium ,sheet) old-medium)) ;is sheet a sheet-with-medium-mixin? --GB
pixmap)
(let ((record (gensym "OUTPUT-RECORD-")))
;; rudi (2005-09-05) What to do when only width or height are
;; given? And what's the meaning of medium-var?
`(let* ((,medium-var ,sheet)
(,record (with-output-to-output-record (,medium-var)
,@body)))
(with-output-to-pixmap
(,medium-var
,sheet
:width ,(or width `(bounding-rectangle-width ,record))
:height ,(or height `(bounding-rectangle-height ,record)))
(replay-output-record ,record ,sheet))))))
;;; XXX This seems to be incorrect.
;;; This presumes that your drawing will completely fill the bounding rectangle
;;; of the sheet and will effectively randomize anything that isn't drawn
;;; within it.
;;; FIXME
#+nil
(defmacro with-double-buffering ((sheet) &body body)
(let ((width (gensym))
(height (gensym))
(pixmap (gensym))
(sheet-mirror (gensym)))
`(let* ((,width (round (bounding-rectangle-width (sheet-region ,sheet))))
(,height (round (bounding-rectangle-height (sheet-region ,sheet))))
(,(gensym) (progn (format *debug-io* "w-d-b ~A ~A~%" ,width ,height) (finish-output *debug-io*) 0))
(,pixmap (allocate-pixmap ,sheet ,width ,height))
(,sheet-mirror (sheet-direct-mirror ,sheet)))
(unwind-protect
(progn
(setf (sheet-direct-mirror ,sheet) (pixmap-mirror ,pixmap))
,@body
(setf (sheet-direct-mirror ,sheet) ,sheet-mirror)
; v-- the sheet might have been degrafted while we weren't looking
; in which case, we shouldn't blit it back
(copy-from-pixmap ,pixmap 0 0 ,width ,height ,sheet 0 0))
(deallocate-pixmap ,pixmap)))))
;;; Another attempt
(defun invoke-with-double-buffering (sheet continuation x1 y1 x2 y2)
(let* ((medium (sheet-medium sheet))
(sheet-transform (sheet-native-transformation sheet))
(medium-transform (medium-transformation (sheet-medium sheet)))
(world-transform (compose-transformations sheet-transform
medium-transform)))
(multiple-value-bind (sheet-x1 sheet-y1)
(transform-position world-transform x1 y1)
(multiple-value-bind (sheet-x2 sheet-y2)
(transform-position world-transform x2 y2)
;; Be conservative with the size of the pixmap, including all of
;; the pixels at the edges.
(let* ((pixmap-x1 (floor sheet-x1))
(pixmap-y1 (floor sheet-y1))
(pixmap-x2 (ceiling sheet-x2))
(pixmap-y2 (ceiling sheet-y2))
(pixmap-width (- pixmap-x2 pixmap-x1))
(pixmap-height (- pixmap-y2 pixmap-y1))
(current-sheet-region (sheet-region sheet))
(sheet-native (compose-transformation-with-translation
sheet-transform
(- pixmap-x1)
(- pixmap-y1)))
(pixmap (allocate-pixmap sheet pixmap-width pixmap-height))
)
(unless pixmap
(error "Couldn't allocate pixmap"))
(multiple-value-bind (user-pixmap-x1 user-pixmap-y1)
(untransform-position world-transform pixmap-x1 pixmap-y1)
(multiple-value-bind (user-pixmap-x2 user-pixmap-y2)
(untransform-position world-transform pixmap-x2 pixmap-y2)
(flet ((set-native (transform region sheet)
(%%set-sheet-native-transformation transform sheet)
(setf (slot-value sheet 'region) region)
(invalidate-cached-regions sheet)
(invalidate-cached-transformations sheet)))
;; Assume that the scaling for the sheet-native
;; transformation for the pixmap will be the same as that of
;; the mirror .
(unwind-protect
(letf (((sheet-parent sheet) nil)
((sheet-direct-mirror sheet)
(pixmap-mirror pixmap)))
(unwind-protect
(let ((pixmap-region
(make-bounding-rectangle user-pixmap-x1
user-pixmap-y1
user-pixmap-x2
user-pixmap-y2)))
(set-native sheet-native pixmap-region sheet)
;(break)
(with-drawing-options
(medium :ink (medium-background medium))
(medium-draw-rectangle* medium
user-pixmap-x1
user-pixmap-y1
user-pixmap-x2
user-pixmap-y2
t))
(funcall continuation sheet
user-pixmap-x1 user-pixmap-y1
user-pixmap-x2 user-pixmap-y2))
(set-native sheet-transform
current-sheet-region
sheet)))
(copy-from-pixmap pixmap 0 0
pixmap-width pixmap-height sheet
user-pixmap-x1 user-pixmap-y1)
(deallocate-pixmap pixmap))))))))))
(defmacro with-double-buffering (((sheet &rest bounds-args)
(&rest pixmap-args))
&body body)
(with-gensyms (continuation)
(let ((cont-form
(case (length pixmap-args)
(1
(with-gensyms (pixmap-x1 pixmap-y1 pixmap-x2 pixmap-y2)
`(,continuation (,sheet
,pixmap-x1 ,pixmap-y1 ,pixmap-x2 ,pixmap-y2)
(let ((,(car pixmap-args)
(make-bounding-rectangle ,pixmap-x1 ,pixmap-y1
,pixmap-x2 ,pixmap-y2)))
,@body))))
(4
`(,continuation (,sheet ,@pixmap-args)
,@body))
(otherwise (error "Invalid pixmap-args ~S" pixmap-args)))))
(case (length bounds-args)
(1
(with-gensyms (x1 y1 x2 y2)
`(flet (,cont-form)
(declare (dynamic-extent #',continuation))
(with-bounding-rectangle* (,x1 ,y1 ,x2 ,y2)
,(car bounds-args)
(invoke-with-double-buffering ,sheet
#',continuation
,x1 ,y1 ,x2 ,y2)))))
(4
`(flet (,cont-form)
(declare (dynamic-extent #',continuation))
(invoke-with-double-buffering ,sheet #',continuation
,@bounds-args)))
(otherwise (error "invalid bounds-args ~S" bounds-args))))))
;;; Generic graphic operation methods
(defmacro def-graphic-op (name (&rest args))
(let ((method-name (symbol-concat '#:medium- name '*)))
`(eval-when (:execute :load-toplevel :compile-toplevel)
(defmethod ,method-name ((stream sheet) ,@args)
(with-sheet-medium (medium stream)
(,method-name medium ,@args))))))
(def-graphic-op draw-point (x y))
(def-graphic-op draw-points (coord-seq))
(def-graphic-op draw-line (x1 y1 x2 y2))
(def-graphic-op draw-lines (coord-seq))
(def-graphic-op draw-polygon (coord-seq closed filled))
(def-graphic-op draw-rectangle (left top right bottom filled))
(def-graphic-op draw-rectangles (position-seq filled))
(def-graphic-op draw-ellipse (center-x center-y
radius-1-dx radius-1-dy radius-2-dx radius-2-dy
start-angle end-angle filled))
(def-graphic-op draw-circle (center-x center-y radius start-angle end-angle filled))
(def-graphic-op draw-text (string x y
start end
align-x align-y
toward-x toward-y transform-glyphs))
;;; Some image junk...
(defmethod medium-free-image-design ((sheet sheet-with-medium-mixin) design)
(medium-free-image-design (sheet-medium sheet) design))
(defmethod medium-draw-image-design* :before (current-medium design x y)
(with-slots (medium medium-data) design
(unless (eq medium current-medium)
(when medium
(medium-free-image-design medium design))
(setf medium current-medium)
(setf medium-data nil))))
(defmethod medium-draw-image-design*
((medium sheet-with-medium-mixin) design x y)
(medium-draw-image-design* (sheet-medium medium) design x y))
;;;;
;;;; DRAW-DESIGN
;;;;
(defmethod draw-design (medium (design point) &rest options &key &allow-other-keys)
(apply #'draw-point* medium (point-x design) (point-y design) options))
(defmethod draw-design (medium (design polyline) &rest options &key &allow-other-keys)
(apply #'draw-polygon medium (polygon-points design)
:closed (polyline-closed design)
:filled nil
options))
(defmethod draw-design (medium (design polygon) &rest options &key &allow-other-keys)
(apply #'draw-polygon medium (polygon-points design)
:closed (polyline-closed design)
:filled t
options))
(defmethod draw-design (medium (design line) &rest options &key &allow-other-keys)
(multiple-value-bind (x1 y1) (line-start-point* design)
(multiple-value-bind (x2 y2) (line-end-point* design)
(apply #'draw-line* medium x1 y1 x2 y2 options))))
(defmethod draw-design (medium (design rectangle) &rest options &key &allow-other-keys)
(multiple-value-bind (x1 y1 x2 y2) (rectangle-edges* design)
(apply #'draw-rectangle* medium x1 y1 x2 y2 options)))
(defmethod draw-design (medium (design ellipse) &rest options &key &allow-other-keys)
(multiple-value-bind (cx cy) (ellipse-center-point* design)
(multiple-value-bind (r1x r1y r2x r2y) (ellipse-radii design)
(multiple-value-call #'draw-ellipse* medium
cx cy r1x r1y r2x r2y
:start-angle (ellipse-start-angle design)
:end-angle (ellipse-end-angle design)
options))))
(defmethod draw-design (medium (design elliptical-arc) &rest options &key &allow-other-keys)
(multiple-value-bind (cx cy) (ellipse-center-point* design)
(multiple-value-bind (r1x r1y r2x r2y) (ellipse-radii design)
(multiple-value-call #'draw-ellipse* medium
cx cy r1x r1y r2x r2y
:start-angle (ellipse-start-angle design)
:end-angle (ellipse-end-angle design)
:filled nil
options))))
(defmethod draw-design (medium (design standard-region-union) &rest options &key &allow-other-keys)
(map-over-region-set-regions (lambda (region)
(apply #'draw-design medium region options))
design))
(defmethod draw-design (medium (design standard-rectangle-set) &rest options &key &allow-other-keys)
;; ### we can do better (faster) than this.
(map-over-region-set-regions (lambda (region)
(apply #'draw-design medium region options))
design))
#+nyi
(defmethod draw-design (medium (design standard-region-intersection) &rest options &key &allow-other-keys)
)
#+nyi
(defmethod draw-design (medium (design standard-region-difference) &rest options &key &allow-other-keys)
)
(defmethod draw-design (medium (design (eql +nowhere+)) &rest options &key &allow-other-keys)
(declare (ignore medium options)
(ignorable design))
nil)
(defmethod draw-design ((medium sheet) (design (eql +everywhere+)) &rest options &key &allow-other-keys)
(apply #'draw-design medium (bounding-rectangle (sheet-region medium)) options))
(defmethod draw-design ((medium medium) (design (eql +everywhere+)) &rest options &key &allow-other-keys)
(apply #'draw-design medium (bounding-rectangle (sheet-region (medium-sheet medium))) options))
;;;