diff options
Diffstat (limited to 'macros/luatex/optex/graphics.opm')
-rw-r--r-- | macros/luatex/optex/graphics.opm | 249 |
1 files changed, 242 insertions, 7 deletions
diff --git a/macros/luatex/optex/graphics.opm b/macros/luatex/optex/graphics.opm index d4a868a3d1..92a1a7a804 100644 --- a/macros/luatex/optex/graphics.opm +++ b/macros/luatex/optex/graphics.opm @@ -1,13 +1,13 @@ %% This is part of OpTeX project, see http://petr.olsak.net/optex -\_codedecl \inspic {Graphics <2020-03-18>} % preloaded in format +\_codedecl \inspic {Graphics <2020-03-29>} % preloaded in format \_doc ----------------------------- `\inspic` accepts old syntax `\inspic <filename><space>` or new syntax `\inspic{<filename>}`. So, we need to define two auxiliary macros `\_inspicA` and `\_inspicB`. - You can include more `\pdfximage` parameters (like `page=`) + You can include more `\pdfximage` parameters (like `page<number>`) in the `\_picparams` macro. All `\inspic` macros are surrounded in `\hbox` in order user can @@ -146,11 +146,11 @@ The `\_scantwodimens` scans two objects with the syntactic rule <dimen> and returns `{<number>}{<number>}` in sp unit. - The `\puttext <down> <right>{<text>}` puts the <text> to desired place: + The `\puttext <right> <up>{<text>}` puts the <text> to desired place: From current point moves <down> and <right>, puts the <text> and returns back. The cuuren tpoint is unchanged after this macro ends. - The `\putpic <down> <right> <width> <height> {<image-file>}` + The `\putpic <right> <up> <width> <height> {<image-file>}` does `\puttext` with the image scaled to desired <width> and <height>. If <with> or <height> is zero, natural dimension is used. The `\nospec` is a shortcut to such natural dimension. @@ -158,18 +158,18 @@ \_def\_scantwodimens{% \_directlua{tex.print(string.format('{\_pcent d}{\_pcent d}', - token.scan_dimen(),token.scan_dimen{}))}% + token.scan_dimen(),token.scan_dimen()))}% } \_def\_puttext{\_ea\_ea\_ea\_puttextA\_scantwodimens} \_def\_puttextA#1#2#3{\_setbox0=\_hbox{{#3}}\_dimen1=#1sp \_dimen2=#2sp \_puttextB} \_def\_puttextB{% - \_ifvmode + \_ifvmode \_ifdim\_prevdepth>0pt \_vskip-\_prevdepth \_relax \_fi \_nointerlineskip \_fi \_wd0=0pt \_ht0=0pt \_dp0=0pt - \_vbox to0pt{\_kern\_dimen1 \_hbox to0pt{\_kern\_dimen2 \_box0\_hss}\_vss}} + \_vbox to0pt{\_kern-\_dimen2 \_hbox to0pt{\_kern\_dimen1 \_box0\_hss}\_vss}} \_def\_putpic{\_ea\_ea\_ea\_putpicA\_scantwodimens} \_def\_putpicA#1#2{\_dimen1=#1sp \_dimen2=#2sp \_ea\_ea\_ea\_putpicB\_scantwodimens} @@ -183,5 +183,240 @@ \_def\nospec{0pt} \_public \puttext \putpic \backgroundpic ; + \_doc ----------------------------- + You can use expandable `\_bp{<dimen>}` convertor from + \TeX/ `<dimen>` (or from an expression accepted by + `\dimexpr` primitive) to a decimal value in big points + (used as natural unit in the PDF format). So, you can write, for example: + \begtt + \pdfliteral{q \_bp{.3\hsize-2mm} \_bp{2mm} m 0 \_bp{-4mm} l S Q} + \endtt + You can use expandable `\_expr{<expression>}` for analogical purposes. + The `<expression>` can include `+-*/()` and decimal numbers in common syntax. + \_cod ----------------------------- + +\_def\_decdigits{3} % digits after decimal point in \_bp and \_expr outputs. +\_def\_pttopb{% + \_directlua{tex.print(string.format('\_pcent.\_decdigits f', + token.scan_dimen()/65781.76))}% pt to bp conversion +} +\def\_bp#1{\_ea\_pttopb\_dimexpr#1\_relax} +\def\_expr#1{\_directlua{tex.print(string.format('\_pcent.\_decdigits f',#1))}} + + \_doc ----------------------------- + `\)circle<x><y>` creates an ellipse with `<x>` axis and `<y>` axix. + The origin is in the center. + `\_oval<x><y><roudness>` creates an oval with `<x>`, `<y>` size and with + given `<roundness>`. The real size is bigger by 2`<roundness>`. The + orgigin is at the left bottom corner. + `\_mv<x><y>{<curve>}` moves current point to `<x>`, `<y>`, crates the + `<curve>` and retuns back the current point. + All these macros are fully expandable and they can be used in the + `\pdfliteral` argument. + \_cod ----------------------------- + +\def\_circle#1#2{\_expr{.5*(#1)} 0 m + \_expr{.5*(#1)} \_expr{.276*(#2)} \_expr{.276*(#1)} \_expr{.5*(#2)} 0 \_expr{.5*(#2)} c + \_expr{-.276*(#1)} \_expr{.5*(#2)} \_expr{-.5*(#1)} \_expr{.276*(#2)} \_expr{-.5*(#1)} 0 c + \_expr{-.5*(#1)} \_expr{-.276*(#2)} \_expr{-.276*(#1)} \_expr{-.5*(#2)} 0 \_expr{-.5*(#2)} c + \_expr{.276*(#1)} \_expr{-.5*(#2)} \_expr{.5*(#1)} \_expr{-.276*(#2)} \_expr{.5*(#1)} 0 c h} + +\def\_oval#1#2#3{0 \_expr{-(#3)} m \_expr{#1} \_expr{-(#3)} l + \_expr{(#1)+.552*(#3)} \_expr{-(#3)} \_expr{(#1)+(#3)} \_expr{-.552*(#3)} + \_expr{(#1)+(#3)} 0 c + \_expr{(#1)+(#3)} \_expr{#2} l + \_expr{(#1)+(#3)} \_expr{(#2)+.552*(#3)} \_expr{(#1)+.552*(#3)} \_expr{(#2)+(#3)} + \_expr{#1} \_expr{(#2)+(#3)} c + 0 \_expr{(#2)+(#3)} l + \_expr{-.552*(#3)} \_expr{(#2)+(#3)} \_expr{-(#3)} \_expr{(#2)+.552*(#3)} + \_expr{-(#3)} \_expr{#2} c + \_expr{-(#3)} 0 l + \_expr{-(#3)} \_expr{-.552*(#3)} \_expr{-.552*(#3)} \_expr{-(#3)} 0 \_expr{-(#3)} c h} + +\def\_mv#1#2#3{1 0 0 1 \_expr{#1} \_expr{#2} cm #3 1 0 0 1 \_expr{-(#1)} \_expr{-(#2)} cm} + + \_doc ----------------------------- + The `\inoval` is an example of `\_oval` usage. + The `\incircle` is an example of `\_circle` usage. + \_cod ----------------------------- + +\_newdimen \_lwidth +\_def\_fcolor{\_let\_fcolorvalue} +\_def\_lcolor{\_let\_lcolorvalue} +\_def\_shadow{\_let\_shadowvalue} +\_def\_overlapmargins{\_let\_overlapmarginsvalue} +\_def\_ratio{\isnextchar ={\_ratioA}{\_ratioA=}} +\_def\_ratioA =#1 {\_def\_ratiovalue{#1}} +\_def\_touppervalue#1{\_ifx#1n\_let#1=N\_fi} + +\_def\_setflcolors#1{% use only in a group + \_def\_setcolor##1{##1}% + \_def\_fillstroke##1##2{##1}% + \_edef#1{\_fcolorvalue}% + \_def\_fillstroke##1##2{##2}% + \_edef#1{#1\_space\_lcolorvalue\_space}% +} + +\_optdef\_inoval[]{\_vbox\_bgroup + \_roundness=2pt \_fcolor=\Yellow \_lcolor=\Red \_lwidth=.5bp + \_shadow=N \_overlapmargins=N \_hhkern=0pt \_vvkern=0pt + \_the\_ovalparams \_relax \_the\_opt \_relax + \_touppervalue\_overlapmarginsvalue \_touppervalue\_shadowvalue + \_ifx\_overlapmarginsvalue N% + \_advance\_hsize by-2\_hhkern \_advance\_hsize by-2\_roundness \_fi + \_setbox0=\_hbox\_bgroup\_bgroup \_aftergroup\_inovalA \_kern\_hhkern \_let\_next=% +} +\_def\_inovalA{\_isnextchar\_colorstackpop\_inovalB\_inovalC} +\_def\_inovalB#1{#1\_isnextchar\_colorstackpop\_inovalB\_inovalC} +\_def\_inovalC{\_egroup % of \setbox0=\hbox\bgroup + \_ifdim\_vvkern=0pt \_else \_ht0=\_dimexpr\_ht0+\_vvkern \_relax + \_dp0=\_dimexpr\_dp0+\_vvkern \_relax \_fi + \_ifdim\_hhkern=0pt \_else \_wd0=\_dimexpr\_wd0+\_hhkern \_relax \_fi + \_ifx\_overlapmarginsvalue N\_dimen0=\_roundness \_dimen1=\_roundness + \_else \_dimen0=-\_hhkern \_dimen1=-\_vvkern \_fi + \_setflcolors\_tmp + \_hbox{\_kern\_dimen0 + \_vbox to0pt{\_kern\_dp0 + \_ifx\_shadowvalue N\_else + \_edef\_tmpb{{\_bp{\_wd0+\_lwidth}}{\_bp{\_ht0+\_dp0+\_lwidth}}{\_bp{\_roundness}}}% + \_doshadow\_oval + \_fi + \_pdfliteral{q \_bp{\_lwidth} w \_tmp + \_oval{\_bp{\wd0}}{\_bp{\_ht0+\_dp0}}{\_bp{\_roundness}} B Q}\_vss}% + \_ht0=\_dimexpr\_ht0+\_dimen1 \_relax \_dp0=\_dimexpr\_dp0+\_dimen1 \_relax + \_box0 + \_kern\_dimen0}% + \_egroup % of \vbox\bgroup +} +\_optdef\_incircle[]{\_vbox\_bgroup + \_ratio=1 \_fcolor=\Yellow \_lcolor=\Red \_lwidth=.5bp + \_shadow=N \_overlapmargins=N \_hhkern=3pt \_vvkern=3pt + \_ea\_the \_ea\_circleparams \_space \_relax + \_ea\_the \_ea\_opt \_space \_relax + \_touppervalue\_overlapmarginsvalue \_touppervalue\_shadowvalue + \_setbox0=\_hbox\_bgroup\_bgroup \_aftergroup\_incircleA \_kern\_hhkern \_let\_next=% +} +\_def\_incircleA {\_isnextchar\_colorstackpop\_incircleB\_incircleC} +\_def\_incircleB #1{#1\_isnextchar\_colorstackpop\_incircleB\_incircleC} +\_def\_incircleC {\_egroup % of \setbox0=\hbox\bgroup + \_wd0=\dimexpr \_wd0+\_hhkern \_relax + \_ht0=\dimexpr \_ht0+\_vvkern \_relax \_dp0=\dimexpr \_dp0+\_vvkern \_relax + \_ifdim \_ratiovalue\_dimexpr \_ht0+\_dp0 > \_wd0 + \_dimen3=\_dimexpr \_ht0+\_dp0 \_relax \_dimen2=\_ratiovalue\_dimen3 + \_else \_dimen2=\_wd0 \_dimen3=\_expr{1/\_ratiovalue}\_dimen2 \fi + \_setflcolors\_tmp + \_ifx\_overlapmarginsvalue N\_dimen0=0pt \_dimen1=0pt + \_else \_dimen0=-\hhkern \_dimen1=-\vvkern \_fi + \_hbox{\_kern\dimen0 + \_ifx\_shadowvalue N\_else + \_edef\_tmpb{{\_bp{\_dimen2+\_lwidth}}{\_bp{\_dimen3+\_lwidth}}{}}% + \_doshadow\_circlet + \_fi + \_pdfliteral{q \_bp{\_lwidth} w \_tmp \_mv{\_bp{.5\_wd0}}{\_bp{(\ht0-\dp0)/2}} + {\_circle{\_bp{\_dimen2}}{\_bp{\_dimen3}} B} Q}% + \_ifdim\_dimen1=0pt \_else + \_ht0=\dimexpr \_ht0+\_dimen1 \_relax \_dp0=\dimexpr \_dp0+\_dimen1 \_relax \_fi + \_box0 + \_kern\_dimen0} + \_egroup % of \vbox\bgroup +} +\_def\_circlet#1#2#3{\_circle{#1}{#2}} + +\_public + \inoval \incircle \ratio \lwidth \fcolor \lcolor \shadow \overlapmargins ; + + \_doc ----------------------------- + A shadow effect is implemented here. The shadow is equal to the + silhouette of the given path in gray-transparent color shifted by + `\shadowmoveto` vector and with blurred boundary. + A waistline with the width 2*`\shadowb` around the boundary is blurred. + The `\shadowlevels` levels of transparent shapes is used for creating + this effect. The `\shadowlevels+1/2` level is equal to the shifted given path. + \_cod ----------------------------- + +\_def\_shadowlevels{9} % number of layers for blurr effect +\_def\_shadowdarknessA{0.025} % transparency of first shadowlevels/2 layers +\_def\_shadowdarknessB{0.07} % transparency of second half of layers +\_def\_shadowmoveto{1.8 -2.5} % vector defines shifting layer (in bp) +\_def\_shadowb{1} % 2*shadowb = blurring area thickness + + \_doc ----------------------------- + The `\_pdfpageresources` primitive is used to define transparency. + It does not work when used in a box. So, we use it at begining of + output routine. The modification of output routine is done only once + when the shadow effect is used first. + \_cod ----------------------------- + +\_def\_insertshadowresources{% + \_global\_addto\_begoutput{\_setshadowresources}% + \_xdef\_setshadowresources{% + \_pdfpageresources{/ExtGState + << + /op1 << /Type /ExtGState /ca \_shadowdarknessA >> + /op2 << /Type /ExtGState /ca \_shadowdarknessB >> + >> + }% + }% + \_global\_let\_insertshadowresources=\_relax +} +\_def\_doshadow#1{\_vbox{% + \_insertshadowresources + \_tmpnum=\_numexpr (\_shadowlevels-1)/2 \_relax + \_edef\_tmpfin{\_the\_tmpnum}% + \_ifnum\_tmpfin=0 \_def\_shadowb{0}\_def\_shadowstep{0}% + \_else \_edef\_shadowstep{\_expr{\_shadowb/\_tmpfin}}\_fi + \_def\_tmpa##1##2##3{\_def\_tmpb + {#1{##1+2*\_the\_tmpnum*\_shadowstep}{##2+2*\_the\_tmpnum*\_shadowstep}{##3}}}% + \_ea \_tmpa \_tmpb + \_def\_shadowlayer{% + \_ifnum\_tmpnum=0 /op2 gs \_fi + \_tmpb\_space f + \_immediateassignment\_advance\_tmpnum by-1 + \_ifnum-\_tmpfin<\_tmpnum + \_ifx#1\_oval 1 0 0 1 \_shadowstep\_space \_shadowstep\_space cm \_fi + \_ea \_shadowlayer \_fi + }% + \_pdfliteral{q /op1 gs 0 g 1 0 0 1 \_shadowmoveto\_space cm + \_ifx#1\_circlet 1 0 0 1 \_expr{\_bp{.5\_wd0}} \_expr{\_bp{(\_ht0-\_dp0)/2}} cm + \_else 1 0 0 1 -\_shadowb\_space -\_shadowb\_space cm \_fi + \_shadowlayer Q} +}} + + \_doc ----------------------------- + A generic macro `\clipinpath{<x>}{<y>}{<curve>}{<text>}` declares + a clipping path by <curve> shifted by <x>, <y>. The <text> is typesset + when such clipping path is active. Dimensions are given by bp without the unit here. + Macros `\clipinoval <x> <y> <width> <height> {<text>}` and + `\clipincircle <x> <y> <width> <height> {<text>}` are defined here. + These marcos read normal \TeX/ dimensions in their parameters. + \_cod ----------------------------- + +\_def\_clipinpath#1#2#3#4{% #1=x-pos[bp], #2=y-pos[bp], #3=curve, #4=text + \_hbox{\setbox0=\hbox{{#4}}% + \_tmpdim=\wd0 \wd0=0pt + \_pdfliteral{q \_mv{#1}{#2}{#3 W n}}% + \_box0\_pdfliteral{Q}\_kern\_tmpdim + }% +} + +\_def\_clipinoval {\_ea\_ea\_ea\_clipinovalA\_scantwodimens} +\_def\_clipinovalA #1#2{% + \_def\_tmp{{#1/65781.76}{#2/65781.76}}% + \_ea\_ea\_ea\_clipinovalB\_scantwodimens +} +\_def\_clipinovalB{\_ea\_clipinovalC\_tmp} +\_def\_clipinovalC#1#2#3#4{% + \_ea\_clipinpath{#1-(#3/131563.52)+(\_bp{\_roundness})}{#2-(#4/131563.52)+(\_bp{\_roundness})}% + {\_oval{#3/65781.76-(\_bp{2\_roundness})}{#4/65781.76-(\_bp{2\_roundness})}{\_bp{\_roundness}}}% +} +\_def\_clipincircle {\_ea\_ea\_ea\_clipincircleA\_scantwodimens} +\_def\_clipincircleA #1#2{% + \_def\_tmp{{#1/65781.76}{#2/65781.76}}% + \_ea\_ea\_ea\_clipincircleB\_scantwodimens +} +\_def\_clipincircleB#1#2{% + \_ea\_clipinpath\_tmp{\_circle{#1/65781.76}{#2/65781.76}}% +} + \_endcode % ------------------------------------- |