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|
%D \module
%D [ file=mp-grph.mpiv,
%D version=2000.12.14,
%D title=\CONTEXT\ \METAPOST\ graphics,
%D subtitle=graphic text support,
%D author=Hans Hagen,
%D date=\currentdate,
%D copyright={PRAGMA ADE \& \CONTEXT\ Development Team}]
%C
%C This module is part of the \CONTEXT\ macro||package and is
%C therefore copyrighted by \PRAGMA. See licen-en.pdf for
%C details.
%D Under construction.
if known context_grph : endinput ; fi ;
boolean context_grph ; context_grph := true ;
picture _currentpicture_ ;
numeric _fig_nesting_ ; _fig_nesting_ := 0 ;
def beginfig (expr c) =
_fig_nesting_ := _fig_nesting_ + 1 ;
if _fig_nesting_ = 1 :
begingroup
charcode := c ;
resetfig ;
scantokens extra_beginfig ;
fi ;
enddef ;
def endfig =
; % safeguard
if _fig_nesting_ = 1 :
scantokens extra_endfig ;
shipit ;
endgroup ;
fi ;
_fig_nesting_ := _fig_nesting_ - 1 ;
enddef;
def resetfig =
clearxy ;
clearit ;
clearpen ;
pickup defaultpen ;
interim linecap := linecap ;
interim linejoin := linejoin ;
interim miterlimit := miterlimit ;
save _background_ ; color _background_ ; _background_ := background ;
save background ; color background ; background := _background_ ;
drawoptions () ;
enddef ;
def protectgraphicmacros =
save showtext ;
save beginfig ; let beginfig = begingraphictextfig ;
save endfig ; let endfig = endgraphictextfig ;
save end ; let end = relax ;
interim prologues := prologues ;
resetfig ; % resets currentpicture
enddef ;
numeric currentgraphictext ; currentgraphictext := 0 ;
def data_mpy_file = job_name & "-mpgraph.mpy" enddef ;
def begingraphictextfig (expr n) =
foundpicture := n ;
scratchpicture := nullpicture ;
enddef ;
def endgraphictextfig =
if foundpicture = currentgraphictext :
expandafter endinput
else :
scratchpicture := nullpicture ;
fi ;
enddef ;
def loadfigure primary filename =
mfun_load_figure(filename)
enddef ;
def mfun_load_figure (expr filename) text figureattributes =
begingroup ;
save figurenumber, figurepicture, number, fixedplace ;
numeric figurenumber ; figurenumber := 0 ;
boolean figureshift ; figureshift := true ;
picture figurepicture ; figurepicture := currentpicture ;
def number primary n = hide(figurenumber := n) enddef ;
def fixedplace = hide(figureshift := false) enddef ;
protectgraphicmacros ;
% defaults
interim linecap := rounded ;
interim linejoin := rounded ;
interim miterlimit := 10 ;
%
currentpicture := nullpicture ;
draw fullcircle figureattributes ; % expand number
currentpicture := nullpicture ;
def beginfig (expr n) =
currentpicture := nullpicture ;
if (figurenumber=n) or (figurenumber=0) :
let endfig = endinput ;
fi ;
enddef ;
let endfig = relax ;
readfile(filename) ;
if figureshift :
currentpicture := currentpicture shifted -llcorner currentpicture ;
fi ;
addto figurepicture also currentpicture figureattributes ;
currentpicture := figurepicture ;
endgroup ;
enddef ;
% shared between old and new
boolean mfun_gt_color_fill ;
boolean mfun_gt_color_draw ;
boolean mfun_gt_shade_fill ;
boolean mfun_gt_reverse_fill ;
boolean mfun_gt_outline_fill ;
picture mfun_gt_picture ;
% this is the old version:
def old_graphictext primary t =
hide (
if mfun_trial_run :
let mfun_graphic_text = mfun_no_graphic_text ;
else :
let mfun_graphic_text = mfun_do_graphic_text ;
fi
)
mfun_graphic_text(t)
enddef ;
def mfun_do_graphic_text (expr t) =
% withprescript "gt_stage=final"
begingroup ;
save figurepicture ; picture figurepicture ;
figurepicture := currentpicture ; currentpicture := nullpicture ;
currentgraphictext := currentgraphictext + 1 ;
mfun_finish_graphic_text % picks up directives
enddef ;
def mfun_no_graphic_text (expr t) text rest =
currentgraphictext := currentgraphictext + 1 ;
draw unitsquare
withprescript "gt_stage=trial"
withprescript "gt_index=" & decimal currentgraphictext
withpostscript t
enddef ;
def mfun_finish_graphic_text text rest =
protectgraphicmacros ; % resets currentpicture
interim linecap := butt ; % normally rounded
interim linejoin := mitered ; % normally rounded
interim miterlimit := 10 ; % todo
let normalwithshade = withshade ;
save foundpicture, scratchpicture, str ;
save fill, draw, withshade, reversefill, outlinefill ;
save withfillcolor, withdrawcolor ; % quite important
numeric foundpicture ; picture scratchpicture ; string str ;
def draw expr p =
% the first, naive implementation was:
% addto scratchpicture doublepath p withpen currentpen ;
% but it is better to turn lines into fills
addto scratchpicture contour boundingbox
image (addto currentpicture doublepath p withpen currentpen) ;
enddef ;
def fill expr p =
addto scratchpicture contour p withpen currentpen ;
enddef ;
def mfun_gt_fill = enddef ; boolean mfun_gt_color_fill ; mfun_gt_color_fill := false ;
def mfun_gt_draw = enddef ; boolean mfun_gt_color_draw ; mfun_gt_color_draw := false ;
def mfun_gt_shade = enddef ; boolean mfun_gt_shade_fill ; mfun_gt_shade_fill := false ;
boolean mfun_gt_reverse_fill ; mfun_gt_reverse_fill := false ;
boolean mfun_gt_outline_fill ; mfun_gt_outline_fill := false ;
def reversefill =
hide(mfun_gt_reverse_fill := true )
enddef ;
def outlinefill =
hide(mfun_gt_outline_fill := true )
enddef ;
def withshade primary c =
hide(def mfun_gt_shade = normalwithshade c enddef ; mfun_gt_shade_fill := true )
enddef ;
def withfillcolor primary c =
hide(def mfun_gt_fill = withcolor c enddef ; mfun_gt_color_fill := true )
enddef ;
def withdrawcolor primary c =
hide(def mfun_gt_draw = withcolor c enddef ; mfun_gt_color_draw := true )
enddef ;
scratchpicture := nullpicture ;
addto scratchpicture doublepath origin rest ; % pre-roll
for i within scratchpicture : % Below here is a dirty tricky test!
if (urcorner dashpart i) = origin :
mfun_gt_outline_fill := false ;
fi ;
endfor ;
scratchpicture := nullpicture ;
readfile(data_mpy_file) ;
scratchpicture := (scratchpicture shifted -llcorner scratchpicture) scaled (1/10) ;
if not mfun_gt_color_draw and not mfun_gt_color_fill :
mfun_gt_color_draw := true ;
fi
if mfun_gt_shade_fill :
mfun_gt_color_draw := false ;
mfun_gt_color_fill := false ;
fi ;
currentpicture := figurepicture ;
if mfun_gt_shade_fill :
for i within scratchpicture :
if filled i :
addto currentpicture contour pathpart i _op_ rest mfun_gt_shade ;
fi ;
endfor ;
else :
if mfun_gt_color_draw and not mfun_gt_reverse_fill :
for i within scratchpicture :
if mfun_gt_color_fill and mfun_gt_outline_fill :
addto currentpicture doublepath pathpart i _op_ rest mfun_gt_fill dashed nullpicture ;
fi ;
if filled i :
addto currentpicture doublepath pathpart i _op_ rest mfun_gt_draw ;
fi ;
endfor ;
fi ;
if mfun_gt_color_fill :
for i within scratchpicture :
if filled i :
addto currentpicture contour pathpart i _op_ rest mfun_gt_fill withpen pencircle scaled 0 ;
fi ;
endfor ;
fi ;
if mfun_gt_color_draw and mfun_gt_reverse_fill :
for i within scratchpicture :
if filled i :
addto currentpicture doublepath pathpart i _op_ rest mfun_gt_draw ;
fi ;
endfor ;
fi ;
for i within scratchpicture :
if stroked i :
addto currentpicture doublepath pathpart i _op_ rest mfun_gt_draw ;
fi ;
endfor ;
fi ;
endgroup ;
enddef ;
% and this is the new one:
% boolean mfun_gt_color_fill ;
% boolean mfun_gt_color_draw ;
% boolean mfun_gt_shade_fill ;
% boolean mfun_gt_reverse_fill ;
% picture mfun_gt_picture ;
def mfun_gt_default = % somewhat compatible
scaled 11.5
withpen pencircle scaled .1
enddef ;
def new_graphictext primary t = % use outlinetext instead
begingroup ;
mfun_graphic_text_indeed(t)
enddef ;
def mfun_graphic_text_indeed(expr t) text rest =
interim linecap := butt ; % normally rounded
interim linejoin := mitered ; % normally rounded
% interim miterlimit := 10 ; % todo
%
let normalwithshade = withshade ;
%
save reversefill, outlinefill, withshade, withfillcolor, withdrawcolor ;
%
def mfun_gt_fill = enddef ;
def mfun_gt_draw = enddef ;
def mfun_gt_shade = enddef ;
%
mfun_gt_color_fill := false ;
mfun_gt_color_draw := false ;
mfun_gt_shade_fill := false ;
mfun_gt_reverse_fill := false ;
%
def reversefill = hide(mfun_gt_reverse_fill := true) enddef ;
def outlinefill = enddef ;
def withshade primary c = hide(mfun_gt_shade_fill := true; def mfun_gt_shade = normalwithshade c enddef ;) enddef ;
def withfillcolor primary c = hide(mfun_gt_color_fill := true; def mfun_gt_fill = withcolor c enddef ;) enddef ;
def withdrawcolor primary c = hide(mfun_gt_color_draw := true; def mfun_gt_draw = withcolor c enddef ;) enddef ;
%
mfun_gt_picture := nullpicture ;
addto mfun_gt_picture doublepath origin rest ; % preroll
mfun_gt_picture := nullpicture ;
%
def reversefill = enddef ;
def outlinefill = enddef ;
def withshade primary c = enddef ;
def withfillcolor primary c = enddef ;
def withdrawcolor primary c = enddef ;
%
if mfun_gt_shade_fill :
draw outlinetext.f(t)(mfun_gt_shade) rest;
elseif mfun_gt_color_fill and mfun_gt_color_draw :
if mfun_gt_reverse_fill :
draw outlinetext.r(t)(mfun_gt_default mfun_gt_fill rest)(mfun_gt_default mfun_gt_draw rest) ;
else :
draw outlinetext.b(t)(mfun_gt_default mfun_gt_draw rest)(mfun_gt_default mfun_gt_fill rest);
fi ;
elseif mfun_gt_color_fill :
draw outlinetext.f(t)(mfun_gt_default mfun_gt_fill rest) ;
elseif mfun_gt_color_draw :
draw outlinetext.d(t)(mfun_gt_default mfun_gt_draw rest) ;
else :
draw outlinetext.d(t)(mfun_gt_default rest) ;
fi ;
%
endgroup ;
enddef ;
let graphictext = old_graphictext ;
%%% graphictext = new_graphictext ; % more than 10 times faster
% example
%
% beginfig (1) ;
% graphictext
% "\vbox{\hsize10cm \input tufte }"
% scaled 8
% withdrawcolor blue
% withfillcolor red
% withpen pencircle scaled 2pt ;
% endfig ;
%
% beginfig(1) ;
% loadfigure "gracht.mp" rotated 20 ;
% loadfigure "koe.mp" number 1 scaled 2 ;
% endfig ;
%
% end
|
