From 85ecc4c8e1043833b73df94a9b42072914b886f1 Mon Sep 17 00:00:00 2001
From: Aliaksandr Dziarkach
 <18146690+AliaksandrDziarkach@users.noreply.github.com>
Date: Thu, 10 Oct 2024 15:27:52 +0300
Subject: [PATCH]  #2512 - Equilibrium Half Arrows are displayed incorrect when
 saved to PNG (svg) by default size (#2537)

---
 .../ref/rendering/render_reactions.py.out     |   2 +
 .../tests/rendering/reactions/issue_2512.ket  | 141 ++++++++++++++++++
 .../tests/rendering/ref/linux/issue_2512.png  | Bin 0 -> 4497 bytes
 .../tests/rendering/ref/mac/issue_2512.png    | Bin 0 -> 4497 bytes
 .../tests/rendering/ref/win/issue_2512.png    | Bin 0 -> 4497 bytes
 .../tests/rendering/render_reactions.py       |  12 ++
 core/render2d/src/render_context.cpp          |  13 +-
 7 files changed, 166 insertions(+), 2 deletions(-)
 create mode 100644 api/tests/integration/tests/rendering/reactions/issue_2512.ket
 create mode 100644 api/tests/integration/tests/rendering/ref/linux/issue_2512.png
 create mode 100644 api/tests/integration/tests/rendering/ref/mac/issue_2512.png
 create mode 100644 api/tests/integration/tests/rendering/ref/win/issue_2512.png

diff --git a/api/tests/integration/ref/rendering/render_reactions.py.out b/api/tests/integration/ref/rendering/render_reactions.py.out
index 6e83fd63a8..7d74ddb834 100644
--- a/api/tests/integration/ref/rendering/render_reactions.py.out
+++ b/api/tests/integration/ref/rendering/render_reactions.py.out
@@ -11,3 +11,5 @@ issue 2457 wrong chiral label position
 issue_2457.png rendering status: OK
 issue 2444 wrong arrow and plus width
 issue_2444.png rendering status: OK
+issue 2512 two short equilibrium half arrows
+issue_2512.png rendering status: OK
diff --git a/api/tests/integration/tests/rendering/reactions/issue_2512.ket b/api/tests/integration/tests/rendering/reactions/issue_2512.ket
new file mode 100644
index 0000000000..f108c02bb4
--- /dev/null
+++ b/api/tests/integration/tests/rendering/reactions/issue_2512.ket
@@ -0,0 +1,141 @@
+{
+    "root": {
+        "nodes": [
+            {
+                "$ref": "mol0"
+            },
+            {
+                "$ref": "mol1"
+            },
+            {
+                "type": "arrow",
+                "data": {
+                    "mode": "unbalanced-equilibrium-filled-half-triangle",
+                    "pos": [
+                        {
+                            "x": 13.700000000000001,
+                            "y": -7.95,
+                            "z": 0
+                        },
+                        {
+                            "x": 14.700000000000001,
+                            "y": -7.95,
+                            "z": 0
+                        }
+                    ]
+                }
+            }
+        ],
+        "connections": [],
+        "templates": []
+    },
+    "mol0": {
+        "type": "molecule",
+        "atoms": [
+            {
+                "label": "C",
+                "location": [
+                    12.549374214363931,
+                    -8.432470415521406,
+                    0
+                ]
+            },
+            {
+                "label": "C",
+                "location": [
+                    13.55062578563607,
+                    -8.432470415521406,
+                    0
+                ]
+            },
+            {
+                "label": "C",
+                "location": [
+                    13.050050188048687,
+                    -7.567529584478595,
+                    0
+                ]
+            }
+        ],
+        "bonds": [
+            {
+                "type": 1,
+                "atoms": [
+                    0,
+                    1
+                ]
+            },
+            {
+                "type": 1,
+                "atoms": [
+                    1,
+                    2
+                ]
+            },
+            {
+                "type": 1,
+                "atoms": [
+                    2,
+                    0
+                ]
+            }
+        ],
+        "stereoFlagPosition": {
+            "x": 13.55062578563607,
+            "y": 6.567529584478595,
+            "z": 0
+        }
+    },
+    "mol1": {
+        "type": "molecule",
+        "atoms": [
+            {
+                "label": "C",
+                "location": [
+                    14.774374214363931,
+                    -8.482470415521407,
+                    0
+                ]
+            },
+            {
+                "label": "C",
+                "location": [
+                    15.77562578563607,
+                    -8.482470415521407,
+                    0
+                ]
+            },
+            {
+                "label": "C",
+                "location": [
+                    15.275050188048686,
+                    -7.6175295844785955,
+                    0
+                ]
+            }
+        ],
+        "bonds": [
+            {
+                "type": 1,
+                "atoms": [
+                    0,
+                    1
+                ]
+            },
+            {
+                "type": 1,
+                "atoms": [
+                    1,
+                    2
+                ]
+            },
+            {
+                "type": 1,
+                "atoms": [
+                    2,
+                    0
+                ]
+            }
+        ]
+    }
+}
\ No newline at end of file
diff --git a/api/tests/integration/tests/rendering/ref/linux/issue_2512.png b/api/tests/integration/tests/rendering/ref/linux/issue_2512.png
new file mode 100644
index 0000000000000000000000000000000000000000..8ede11ca25ae77d3b99d42a97bef4f789345a966
GIT binary patch
literal 4497
zcmX9?2Q-^+A60u(Ge(C|)v8rhwOV5Dpw)<4rGnU-D7E*DRjalRn@E(HRaL94N+TjD
z)%Gunme_o+^PQZN<h;-Oym{_#+<SjXftVX`unM!%(9m!g8R}Zm(3~>{zCUKB1>U=c
zIB>uR<6{#8U7FLgR|T#fMMHC5-$+;cepu;x84|)jLpM@b&*EyCovWWvlfszd?nbXq
zOrw2u&O`T>C5Yjw)>Zne?zu@Z?iyAVR<F3PhL2xPR8{5sPUp={n`hv$gkt?_cRA~D
z@7VvS48Qi2f`f-nbs?vIHvectQoG^1-N=pEz}^vXt(77lt6nPfyMR_DBz{mBL(}-d
zwM{Qg0Jlp<mX(#s$;p-6_8x3Z1}iGwNIniIFDk;ijBvJi`T8!*%qWNdb?wQO=9`X%
zAVWh!A|fI(GcpD&#KpyXPYw|2zzQnv(*ijqC8d8(KtNy-)z;SLGLq@cuUA<Fk|cI_
zc6K&3ao!kt_s+CPA;uY$Z_Iz`QuF=mt;W?5Q<m=(O*OT*{>%C;6bhv@Kc7KlrnscU
z#KdIFs2cJoJ3pUaNGN=<|D2=a!pTV#DWIcTJiWA3^krjBjc%<~MtZu&&R6S2R0{7^
za!)ufMnBay@W)4fCMKq^{NB@(LoB~X!VTo^&W`40KV1dB{3+G8>k;SO=BB1Z^z*#D
z_=l3i<0;9>PWLW1Ha5-?iGFEc*lnqqsj0DO>T=e-w$q*e-ZaNfd3$?zzkTa>t)@uz
zszrJH1kT3B#>x3}l^!<OBk?j)MMcF9M)qKXz72Xsj8<1u^YZfQkB*CtZIK3c7}o{>
zXIm5x^7BhhNr|zjE-n@({dY?%8+Uwkq-B<I>E6lr;k4Z*Zb3mNM0-<{c~A^rAbhG^
zbCY%a!-woqSCo_)ZM1orT5wnx2%{Bj*t*;M^w4Rzwzk&e5!}hCe{__kLCNKP`sdG<
z{>oP4#nC7GKR+8>Vkmr3QZlzbhk0=QfsqkQk57AhyFcQ75;KyEgG2LVZ@D6~&h+`;
zjlNS)yY`9-8oZl>LwS+-H8)P=SDgnB`1c@{knu8g!N{=F<6TEw1b?%ka&k+kr|0zs
z?BBlu7Z4wR{Dqf?GdBGG^=t2&V|0pC?&HZL>YVTHeCQ?YCM_*3;Z!Z^=#H0HT59TG
zEkt5(eSU5Z0f#er!Utj*jBBlS4-B#{ChW!rui;Z9a;xI%>gq@&QfsRs2~00}=MJc|
z0Mps|`dCFnL-gp|moIIvUa_QsGZrzSP$;OOc)H#qa8^=Mk{%yyVv_cW_1fE4&CPJo
z`|0U_E2AhZnwj=6g-1jLxxrc}XWxdwFv)0~9{r2BWLXt6OU}s1*i4)FZ|04v&+tjz
z_7@X*me<);f=<4EahaK!y}@e&K6;UZTf0s$m~an6UVeVc4J(m5>x~fU$jHcaM1i5X
zc_P}@(o(F{Fx8;~cMj+wARk!0E&ZsdyBZy_v9#WAT1%3EYH6qrhno5kyRlf14XM+6
zj-6O=TrfB@6YS>)xtzm?dpRq@4Fc^QZuBh|BpOFYpAK=|W6%6BG^DfJO#tE?w)g7Q
ztE!Z*=WZhx-UhRUu=s_Bs#KZulW|CA@4EVWHnH46h7773=>6oRoUE+3t1CT5YuOg#
zb3vnYD2Z#$eqmwZQbR){qTqv5dng!8+khn!VG_oW>-kffyP`e0KqYXI^{lWJ6J(lc
z?|`*mzgjwbdG)cbqdamYrJ6{A5M7{P_+ga}n}qKA`Vl-{;47_h=+TSl6QK}m$KFWQ
zEY@qJ&)&Z8T}wy~;Xn8*7V!Aa?(ULh8w9=~hRMOvQNBj&c(HYNt+|ggbAd>Fi^E;0
zefi;oAtWy$VYt<0WY5ZQDboQ-XZmKev8|2g`a*{X?=HvT!NJAIP3@M-!a_mOujvfz
zmZ?dc7b5;ms0;*v!GqNGIZNZUwKagdicO_lK=0?~4#%G>ZHAjO3(7rm+BGe>h{NG1
zHdp3*cJOuy2?<S2O|iyc*Px&ve1ol~rY8H4Y3ZHT?rssuSbs?s6+tOZet!N|rh=4=
z4;WNVPR{S?`Z#-ab@c_TKOJs7J)J%54w6dImd|#)bC)#E^tXgWc=#1a1IK)1P!ONP
z3YX?KBs#i}TfFOXCvMi(WO#VEC+}4OUYF>r;pv;fJ+~6FPE_7&C|81Kf-4oOvLy^M
z`z6c_4HxYt4Rq0%&W0;NuV24*@)q7UF`|EoLpwitf{r?l_~J7%Rw&Q(m)kCo9Jb5>
z;f$a|eNOh=n0fPX$ofqIIzH2Xy;NLly-}p9m_)EON#1x2u=M*35vJ6^e7s~iuB4=7
zNoJs>MS(m9@2h3!<Xpu?R##G2X<2ZjunnV}q9SIl&BcMZp5$B1Td>LF<6{wFVNjyb
zy{MzEz@Oz|-&x3^=LH3KXW=hmegHK!w5`|E(b+i|azB-mvc7I@Z4Ct4pG8_$*1jv?
z3Um_4tdWuS4Tu!V?8V*VgPk=X(q(Gs>T0^XQ+nXiZsx<`lryl5jEqiP&c%3LMP{mW
z;?)<CJg%~pLl>brDAbV2bJF=CGO4}blXKR_=+u;;j{#rGz$EN-L&M4&Xr6P<uViOm
zDunR#kjnB_{_GjF+Pw4x4>OVuN0_!BGVPLUrHWk~*wSS*_sU}I=OT3c<d<3#?R}C&
z%GtV$szT+IfSz%3HaSVA(FlrMK7dt8e9HwpOAwn?6{D-b^c^Z>eTEpAu{4iPM<-NK
zq)3dGD6%1QE`}TksfqvKYt>~sJR}dEEh$6CBMz>hg(}|(YKfH+2+*(uzfl<2U_&?J
zNIVbM8aiS<KR@zmU|{KEz6{hA@`2t&-Yw)C1zA7v<AOHD3=EH;LB?yjx=QL_;rr6B
z%xLr}=7A^kV_%-cLG3-^1%n(OkO4QF%8dhuJxr*#w`{|mbh=rwp7hCjLl(;ZC2)MP
zdpsP8;?)_F($u_wuRA}h#+MSKi8DzyyqU4-wc$P2Igl!I{rY!|U$xN1iy@(*BVm}j
z?4g~tZ%Y_eUtixx3#$aj0A5~R1|r)Fs+&PS>v8oUgwWMFIy#E|0cp`T54fG>zerr1
zCR1oaD@*7zo)J2vQr)?gH-`8B{q*+odR8=?Cdk&xMyALH;d#{b$FJ$+@X$}f67KRB
z`h>B$@Q5K;$_NBPnR;mKlYlS9Sc$?h6Jz5DB+{R)i%mrZ^Xr#8>H7B2B+S^tVxcEo
z$wrkuFcgOB?nWY!>Qf$OJtRry(u4aFj1xbNrQ+h^JUl%75^wWBv3_EIV4t~KUAR+I
zQ=QC&)i^pG!dg_G^A;i`<mI{Wb(ymSmU=Wg_~dB+aRih}%6VgD#Z|iK<@tC|I+<qs
z?)NTB8U&FsEt_f~5fPL=4E0EEYHCWw{f|t{<ppxAn{4GYfxz5t-fY{RIFf6*o*|P+
zn{X*=@0>%izrR2B$7TPW{~i$51O!*+N{+V6fi|niUVup4M=rDGfX`&Ce8Vwnp8+F!
z-xGmY+K|{1Bay{{LZAM>80yMFTb?zKNLr2U11=`==~HbMOG`_~$SsEN3F5*4lWlHp
zf`o*eK~k45KYPkhBn@B(6k&gVKcK60>;O=!z}4}kC*K?#94O>e-AahG+f?~H9{*k;
zy}H^ZG!%nE@%mU68=06K?k#5x1cZl&hlSnYN)UeP(qDp(H@C9lX^4OQ`Z_6KF9wMc
zS;~6UD=jVkEUC1xFv%`cF5VDvlT4;u`#n4bRJ0VT3yY;W_VMvq>A9v2{1~60;F@=U
z5)+b(oxLB9HX4Un+t@H#aLap`=@adwP|m<E`0k(imfK27O8#R@yf`zTRVUxA_5yCp
z>-m%psclvMj1CnRTa#bXe5v98R%5EOU16w9DV5Q=5`vIR@HC0UjvP)(N|GpWOUI1@
zZIx7p?|3}S3Y^!#PX6pR&DfW3-mqar>5>88R?p(^UZ6;IgUh1P=t@dCJz!M(m!ME+
zsah~AMpPS%88suGEnm5EWvRdgq*13V<h60e#HndnSt=1DD}MWbp8y8ZPnX9WVTA}l
zwcuvj3Vg^tDRwynu5h?cVSZj7$Uf7VYBL5q0AxFZtZ3;q+s1%*^YFOlqe@F#LXz~_
z7#}wcyWI+;S?T7@o8H7*e#}`Kf0I9Zm?h4t16pGvstQ0ZvV&QBdpAmo2;YAP+#0yK
zsQnAgA#xk^F!|is87E3r1HHV)vG%z}dU^~E6M1=jqyYL6Nqr{JxwHNK9a179C6klp
z62=PsWJ*Kr!9j#Xi2j{4L3u_4gXv;Zz7V{Xt}eZg>dT6HWq<VUY&+Z;Z{_a(@;p-f
z1(h1IS9c3AP#DovXX*Tpf(~KlO7DW(3O=P|WhG60)k)$MdaL>nd3bmj_cU2)M@SCe
zWY3292VfqNO?pfN7@kd1ZGHW6!4Q{<56LeigpujTpFckCyAX3Kxi9)&!<}4!zb#D=
zxzNMdcxSk5*W0(8oSffn-idUFtjGQto0w2`w>zd@6c&!{N?w7>R{r~4|6-7M<Hn75
zvPpw1z~KSdKB|#b5b4EF^DMklpgerd!Wq!Ewwv^2bprsQG}yNHZ>g!N8L!Uw#*1kn
zST2OXtb>AX?Q-l8=J?L^qh7huvF{=P@*)@v?jHr_6HgD10a*iXu#V1vA`AvAR}D;D
zwuzu{NJ!j}l`SbQ&ekht*VfkFOwG}Pq2isdt~c0s3t&Vm733O?3UOJN?s4|<G{DfQ
zSAiom_nojB3^UNvFBa&0PJbk~yS*LXS7WNOTfhd8gji3``a<7}F)7%YcU+w;WBYh>
z7?8fZdy90?l9`zqfL(7vpit(i^GiTN**Q3X7{$i@D8kpwoZ+NUyc~jy8Li9^x$IJf
zfQG3oMAF&s1NQ#6y<<DBHV3#==orO<P?C`WTHvGoyW!!1cI$@^f!+n3<<v3qyy(rs
z4yg$$xy6~T0SgQt=YonEb1e`z?SZH{MN=v&E|UV@#g*Z=|8#Hs=U^Lm=3V6bj@lH&
z%@TR9n)g$O^JN}>FVN|tE1jQN0m{P`?a3c`aI!sZp@#qJw9((M)lz%w?0Tn{&`WNX
zdgbQ=0J6=4+g$)sK$6?xQ}`TwjgRl|CqR({?M1-A0XBB~f=Pl(W&;QS>8E{qu>bP~
z!fss-nU#?N6h5z)L@ls=k)psp6uC3=5c{J@83@RHcj$6K922@j%6k{vO_`X45z&Z3
zX*ILBIgIa+zcMf^<wnAITMeZEy#c`f!e@x6cs}}h4|xhapJx&V{yFE{mw@gH|K~;u
z7|-LEvFQ)VPE2GZ1t|O@BAN%NdKn&Or?bEmC+yIhI}Xs-(qKYG6kw;mO;5+!WzGU7
z1O@>0QQcDw{UaKw4g!I~HdsTYXnZ_8wzjq`rTHp$q{YNyDoI1NCWX1VxmvQgW9nRf
zem<7}`T6VlAE&08TU&FSLF($=|9(ylT`XQT1%?U-hl|h?AOlVZ-!D8H!}!dzF8r~=
zDm?kfN8FZ{0+7qvbpj>EN-6KMxOdzEn<Aa|mi}B>aSBNNy|l6-i5k_tm%qxUj`-a=
zauH<(Xs~+dpZJHXfK8q~J(wa>nrQjv!@|Q;qIf2X0V09!GjWRc%O>4e3Frb0_DfN8
zN1b{f?i%0YuCT4Dq@<C}O@$$a-rimg4vy`l8ew2!ii(QrA5&CR)YH>j4D|G6{oV6#
zQr+pjg^9^nqaDVxq?I&23%L1L*7ZfFOfvg>dkX9>8Fu^$RcR+DC&0KC_oUWpbdpfv
z4vg*>G$Z&3C3kVxYLsr>T3KDifBTkXm+X=K{5gwDrR<h*C1m?CFe(n|Nk=?abYXl{
mXW`4L*Y>GiB|+Twgz5Rg?z_#MI4bZT3yqPUxo#8KDfWLdQq~aw

literal 0
HcmV?d00001

diff --git a/api/tests/integration/tests/rendering/ref/mac/issue_2512.png b/api/tests/integration/tests/rendering/ref/mac/issue_2512.png
new file mode 100644
index 0000000000000000000000000000000000000000..8ede11ca25ae77d3b99d42a97bef4f789345a966
GIT binary patch
literal 4497
zcmX9?2Q-^+A60u(Ge(C|)v8rhwOV5Dpw)<4rGnU-D7E*DRjalRn@E(HRaL94N+TjD
z)%Gunme_o+^PQZN<h;-Oym{_#+<SjXftVX`unM!%(9m!g8R}Zm(3~>{zCUKB1>U=c
zIB>uR<6{#8U7FLgR|T#fMMHC5-$+;cepu;x84|)jLpM@b&*EyCovWWvlfszd?nbXq
zOrw2u&O`T>C5Yjw)>Zne?zu@Z?iyAVR<F3PhL2xPR8{5sPUp={n`hv$gkt?_cRA~D
z@7VvS48Qi2f`f-nbs?vIHvectQoG^1-N=pEz}^vXt(77lt6nPfyMR_DBz{mBL(}-d
zwM{Qg0Jlp<mX(#s$;p-6_8x3Z1}iGwNIniIFDk;ijBvJi`T8!*%qWNdb?wQO=9`X%
zAVWh!A|fI(GcpD&#KpyXPYw|2zzQnv(*ijqC8d8(KtNy-)z;SLGLq@cuUA<Fk|cI_
zc6K&3ao!kt_s+CPA;uY$Z_Iz`QuF=mt;W?5Q<m=(O*OT*{>%C;6bhv@Kc7KlrnscU
z#KdIFs2cJoJ3pUaNGN=<|D2=a!pTV#DWIcTJiWA3^krjBjc%<~MtZu&&R6S2R0{7^
za!)ufMnBay@W)4fCMKq^{NB@(LoB~X!VTo^&W`40KV1dB{3+G8>k;SO=BB1Z^z*#D
z_=l3i<0;9>PWLW1Ha5-?iGFEc*lnqqsj0DO>T=e-w$q*e-ZaNfd3$?zzkTa>t)@uz
zszrJH1kT3B#>x3}l^!<OBk?j)MMcF9M)qKXz72Xsj8<1u^YZfQkB*CtZIK3c7}o{>
zXIm5x^7BhhNr|zjE-n@({dY?%8+Uwkq-B<I>E6lr;k4Z*Zb3mNM0-<{c~A^rAbhG^
zbCY%a!-woqSCo_)ZM1orT5wnx2%{Bj*t*;M^w4Rzwzk&e5!}hCe{__kLCNKP`sdG<
z{>oP4#nC7GKR+8>Vkmr3QZlzbhk0=QfsqkQk57AhyFcQ75;KyEgG2LVZ@D6~&h+`;
zjlNS)yY`9-8oZl>LwS+-H8)P=SDgnB`1c@{knu8g!N{=F<6TEw1b?%ka&k+kr|0zs
z?BBlu7Z4wR{Dqf?GdBGG^=t2&V|0pC?&HZL>YVTHeCQ?YCM_*3;Z!Z^=#H0HT59TG
zEkt5(eSU5Z0f#er!Utj*jBBlS4-B#{ChW!rui;Z9a;xI%>gq@&QfsRs2~00}=MJc|
z0Mps|`dCFnL-gp|moIIvUa_QsGZrzSP$;OOc)H#qa8^=Mk{%yyVv_cW_1fE4&CPJo
z`|0U_E2AhZnwj=6g-1jLxxrc}XWxdwFv)0~9{r2BWLXt6OU}s1*i4)FZ|04v&+tjz
z_7@X*me<);f=<4EahaK!y}@e&K6;UZTf0s$m~an6UVeVc4J(m5>x~fU$jHcaM1i5X
zc_P}@(o(F{Fx8;~cMj+wARk!0E&ZsdyBZy_v9#WAT1%3EYH6qrhno5kyRlf14XM+6
zj-6O=TrfB@6YS>)xtzm?dpRq@4Fc^QZuBh|BpOFYpAK=|W6%6BG^DfJO#tE?w)g7Q
ztE!Z*=WZhx-UhRUu=s_Bs#KZulW|CA@4EVWHnH46h7773=>6oRoUE+3t1CT5YuOg#
zb3vnYD2Z#$eqmwZQbR){qTqv5dng!8+khn!VG_oW>-kffyP`e0KqYXI^{lWJ6J(lc
z?|`*mzgjwbdG)cbqdamYrJ6{A5M7{P_+ga}n}qKA`Vl-{;47_h=+TSl6QK}m$KFWQ
zEY@qJ&)&Z8T}wy~;Xn8*7V!Aa?(ULh8w9=~hRMOvQNBj&c(HYNt+|ggbAd>Fi^E;0
zefi;oAtWy$VYt<0WY5ZQDboQ-XZmKev8|2g`a*{X?=HvT!NJAIP3@M-!a_mOujvfz
zmZ?dc7b5;ms0;*v!GqNGIZNZUwKagdicO_lK=0?~4#%G>ZHAjO3(7rm+BGe>h{NG1
zHdp3*cJOuy2?<S2O|iyc*Px&ve1ol~rY8H4Y3ZHT?rssuSbs?s6+tOZet!N|rh=4=
z4;WNVPR{S?`Z#-ab@c_TKOJs7J)J%54w6dImd|#)bC)#E^tXgWc=#1a1IK)1P!ONP
z3YX?KBs#i}TfFOXCvMi(WO#VEC+}4OUYF>r;pv;fJ+~6FPE_7&C|81Kf-4oOvLy^M
z`z6c_4HxYt4Rq0%&W0;NuV24*@)q7UF`|EoLpwitf{r?l_~J7%Rw&Q(m)kCo9Jb5>
z;f$a|eNOh=n0fPX$ofqIIzH2Xy;NLly-}p9m_)EON#1x2u=M*35vJ6^e7s~iuB4=7
zNoJs>MS(m9@2h3!<Xpu?R##G2X<2ZjunnV}q9SIl&BcMZp5$B1Td>LF<6{wFVNjyb
zy{MzEz@Oz|-&x3^=LH3KXW=hmegHK!w5`|E(b+i|azB-mvc7I@Z4Ct4pG8_$*1jv?
z3Um_4tdWuS4Tu!V?8V*VgPk=X(q(Gs>T0^XQ+nXiZsx<`lryl5jEqiP&c%3LMP{mW
z;?)<CJg%~pLl>brDAbV2bJF=CGO4}blXKR_=+u;;j{#rGz$EN-L&M4&Xr6P<uViOm
zDunR#kjnB_{_GjF+Pw4x4>OVuN0_!BGVPLUrHWk~*wSS*_sU}I=OT3c<d<3#?R}C&
z%GtV$szT+IfSz%3HaSVA(FlrMK7dt8e9HwpOAwn?6{D-b^c^Z>eTEpAu{4iPM<-NK
zq)3dGD6%1QE`}TksfqvKYt>~sJR}dEEh$6CBMz>hg(}|(YKfH+2+*(uzfl<2U_&?J
zNIVbM8aiS<KR@zmU|{KEz6{hA@`2t&-Yw)C1zA7v<AOHD3=EH;LB?yjx=QL_;rr6B
z%xLr}=7A^kV_%-cLG3-^1%n(OkO4QF%8dhuJxr*#w`{|mbh=rwp7hCjLl(;ZC2)MP
zdpsP8;?)_F($u_wuRA}h#+MSKi8DzyyqU4-wc$P2Igl!I{rY!|U$xN1iy@(*BVm}j
z?4g~tZ%Y_eUtixx3#$aj0A5~R1|r)Fs+&PS>v8oUgwWMFIy#E|0cp`T54fG>zerr1
zCR1oaD@*7zo)J2vQr)?gH-`8B{q*+odR8=?Cdk&xMyALH;d#{b$FJ$+@X$}f67KRB
z`h>B$@Q5K;$_NBPnR;mKlYlS9Sc$?h6Jz5DB+{R)i%mrZ^Xr#8>H7B2B+S^tVxcEo
z$wrkuFcgOB?nWY!>Qf$OJtRry(u4aFj1xbNrQ+h^JUl%75^wWBv3_EIV4t~KUAR+I
zQ=QC&)i^pG!dg_G^A;i`<mI{Wb(ymSmU=Wg_~dB+aRih}%6VgD#Z|iK<@tC|I+<qs
z?)NTB8U&FsEt_f~5fPL=4E0EEYHCWw{f|t{<ppxAn{4GYfxz5t-fY{RIFf6*o*|P+
zn{X*=@0>%izrR2B$7TPW{~i$51O!*+N{+V6fi|niUVup4M=rDGfX`&Ce8Vwnp8+F!
z-xGmY+K|{1Bay{{LZAM>80yMFTb?zKNLr2U11=`==~HbMOG`_~$SsEN3F5*4lWlHp
zf`o*eK~k45KYPkhBn@B(6k&gVKcK60>;O=!z}4}kC*K?#94O>e-AahG+f?~H9{*k;
zy}H^ZG!%nE@%mU68=06K?k#5x1cZl&hlSnYN)UeP(qDp(H@C9lX^4OQ`Z_6KF9wMc
zS;~6UD=jVkEUC1xFv%`cF5VDvlT4;u`#n4bRJ0VT3yY;W_VMvq>A9v2{1~60;F@=U
z5)+b(oxLB9HX4Un+t@H#aLap`=@adwP|m<E`0k(imfK27O8#R@yf`zTRVUxA_5yCp
z>-m%psclvMj1CnRTa#bXe5v98R%5EOU16w9DV5Q=5`vIR@HC0UjvP)(N|GpWOUI1@
zZIx7p?|3}S3Y^!#PX6pR&DfW3-mqar>5>88R?p(^UZ6;IgUh1P=t@dCJz!M(m!ME+
zsah~AMpPS%88suGEnm5EWvRdgq*13V<h60e#HndnSt=1DD}MWbp8y8ZPnX9WVTA}l
zwcuvj3Vg^tDRwynu5h?cVSZj7$Uf7VYBL5q0AxFZtZ3;q+s1%*^YFOlqe@F#LXz~_
z7#}wcyWI+;S?T7@o8H7*e#}`Kf0I9Zm?h4t16pGvstQ0ZvV&QBdpAmo2;YAP+#0yK
zsQnAgA#xk^F!|is87E3r1HHV)vG%z}dU^~E6M1=jqyYL6Nqr{JxwHNK9a179C6klp
z62=PsWJ*Kr!9j#Xi2j{4L3u_4gXv;Zz7V{Xt}eZg>dT6HWq<VUY&+Z;Z{_a(@;p-f
z1(h1IS9c3AP#DovXX*Tpf(~KlO7DW(3O=P|WhG60)k)$MdaL>nd3bmj_cU2)M@SCe
zWY3292VfqNO?pfN7@kd1ZGHW6!4Q{<56LeigpujTpFckCyAX3Kxi9)&!<}4!zb#D=
zxzNMdcxSk5*W0(8oSffn-idUFtjGQto0w2`w>zd@6c&!{N?w7>R{r~4|6-7M<Hn75
zvPpw1z~KSdKB|#b5b4EF^DMklpgerd!Wq!Ewwv^2bprsQG}yNHZ>g!N8L!Uw#*1kn
zST2OXtb>AX?Q-l8=J?L^qh7huvF{=P@*)@v?jHr_6HgD10a*iXu#V1vA`AvAR}D;D
zwuzu{NJ!j}l`SbQ&ekht*VfkFOwG}Pq2isdt~c0s3t&Vm733O?3UOJN?s4|<G{DfQ
zSAiom_nojB3^UNvFBa&0PJbk~yS*LXS7WNOTfhd8gji3``a<7}F)7%YcU+w;WBYh>
z7?8fZdy90?l9`zqfL(7vpit(i^GiTN**Q3X7{$i@D8kpwoZ+NUyc~jy8Li9^x$IJf
zfQG3oMAF&s1NQ#6y<<DBHV3#==orO<P?C`WTHvGoyW!!1cI$@^f!+n3<<v3qyy(rs
z4yg$$xy6~T0SgQt=YonEb1e`z?SZH{MN=v&E|UV@#g*Z=|8#Hs=U^Lm=3V6bj@lH&
z%@TR9n)g$O^JN}>FVN|tE1jQN0m{P`?a3c`aI!sZp@#qJw9((M)lz%w?0Tn{&`WNX
zdgbQ=0J6=4+g$)sK$6?xQ}`TwjgRl|CqR({?M1-A0XBB~f=Pl(W&;QS>8E{qu>bP~
z!fss-nU#?N6h5z)L@ls=k)psp6uC3=5c{J@83@RHcj$6K922@j%6k{vO_`X45z&Z3
zX*ILBIgIa+zcMf^<wnAITMeZEy#c`f!e@x6cs}}h4|xhapJx&V{yFE{mw@gH|K~;u
z7|-LEvFQ)VPE2GZ1t|O@BAN%NdKn&Or?bEmC+yIhI}Xs-(qKYG6kw;mO;5+!WzGU7
z1O@>0QQcDw{UaKw4g!I~HdsTYXnZ_8wzjq`rTHp$q{YNyDoI1NCWX1VxmvQgW9nRf
zem<7}`T6VlAE&08TU&FSLF($=|9(ylT`XQT1%?U-hl|h?AOlVZ-!D8H!}!dzF8r~=
zDm?kfN8FZ{0+7qvbpj>EN-6KMxOdzEn<Aa|mi}B>aSBNNy|l6-i5k_tm%qxUj`-a=
zauH<(Xs~+dpZJHXfK8q~J(wa>nrQjv!@|Q;qIf2X0V09!GjWRc%O>4e3Frb0_DfN8
zN1b{f?i%0YuCT4Dq@<C}O@$$a-rimg4vy`l8ew2!ii(QrA5&CR)YH>j4D|G6{oV6#
zQr+pjg^9^nqaDVxq?I&23%L1L*7ZfFOfvg>dkX9>8Fu^$RcR+DC&0KC_oUWpbdpfv
z4vg*>G$Z&3C3kVxYLsr>T3KDifBTkXm+X=K{5gwDrR<h*C1m?CFe(n|Nk=?abYXl{
mXW`4L*Y>GiB|+Twgz5Rg?z_#MI4bZT3yqPUxo#8KDfWLdQq~aw

literal 0
HcmV?d00001

diff --git a/api/tests/integration/tests/rendering/ref/win/issue_2512.png b/api/tests/integration/tests/rendering/ref/win/issue_2512.png
new file mode 100644
index 0000000000000000000000000000000000000000..8ede11ca25ae77d3b99d42a97bef4f789345a966
GIT binary patch
literal 4497
zcmX9?2Q-^+A60u(Ge(C|)v8rhwOV5Dpw)<4rGnU-D7E*DRjalRn@E(HRaL94N+TjD
z)%Gunme_o+^PQZN<h;-Oym{_#+<SjXftVX`unM!%(9m!g8R}Zm(3~>{zCUKB1>U=c
zIB>uR<6{#8U7FLgR|T#fMMHC5-$+;cepu;x84|)jLpM@b&*EyCovWWvlfszd?nbXq
zOrw2u&O`T>C5Yjw)>Zne?zu@Z?iyAVR<F3PhL2xPR8{5sPUp={n`hv$gkt?_cRA~D
z@7VvS48Qi2f`f-nbs?vIHvectQoG^1-N=pEz}^vXt(77lt6nPfyMR_DBz{mBL(}-d
zwM{Qg0Jlp<mX(#s$;p-6_8x3Z1}iGwNIniIFDk;ijBvJi`T8!*%qWNdb?wQO=9`X%
zAVWh!A|fI(GcpD&#KpyXPYw|2zzQnv(*ijqC8d8(KtNy-)z;SLGLq@cuUA<Fk|cI_
zc6K&3ao!kt_s+CPA;uY$Z_Iz`QuF=mt;W?5Q<m=(O*OT*{>%C;6bhv@Kc7KlrnscU
z#KdIFs2cJoJ3pUaNGN=<|D2=a!pTV#DWIcTJiWA3^krjBjc%<~MtZu&&R6S2R0{7^
za!)ufMnBay@W)4fCMKq^{NB@(LoB~X!VTo^&W`40KV1dB{3+G8>k;SO=BB1Z^z*#D
z_=l3i<0;9>PWLW1Ha5-?iGFEc*lnqqsj0DO>T=e-w$q*e-ZaNfd3$?zzkTa>t)@uz
zszrJH1kT3B#>x3}l^!<OBk?j)MMcF9M)qKXz72Xsj8<1u^YZfQkB*CtZIK3c7}o{>
zXIm5x^7BhhNr|zjE-n@({dY?%8+Uwkq-B<I>E6lr;k4Z*Zb3mNM0-<{c~A^rAbhG^
zbCY%a!-woqSCo_)ZM1orT5wnx2%{Bj*t*;M^w4Rzwzk&e5!}hCe{__kLCNKP`sdG<
z{>oP4#nC7GKR+8>Vkmr3QZlzbhk0=QfsqkQk57AhyFcQ75;KyEgG2LVZ@D6~&h+`;
zjlNS)yY`9-8oZl>LwS+-H8)P=SDgnB`1c@{knu8g!N{=F<6TEw1b?%ka&k+kr|0zs
z?BBlu7Z4wR{Dqf?GdBGG^=t2&V|0pC?&HZL>YVTHeCQ?YCM_*3;Z!Z^=#H0HT59TG
zEkt5(eSU5Z0f#er!Utj*jBBlS4-B#{ChW!rui;Z9a;xI%>gq@&QfsRs2~00}=MJc|
z0Mps|`dCFnL-gp|moIIvUa_QsGZrzSP$;OOc)H#qa8^=Mk{%yyVv_cW_1fE4&CPJo
z`|0U_E2AhZnwj=6g-1jLxxrc}XWxdwFv)0~9{r2BWLXt6OU}s1*i4)FZ|04v&+tjz
z_7@X*me<);f=<4EahaK!y}@e&K6;UZTf0s$m~an6UVeVc4J(m5>x~fU$jHcaM1i5X
zc_P}@(o(F{Fx8;~cMj+wARk!0E&ZsdyBZy_v9#WAT1%3EYH6qrhno5kyRlf14XM+6
zj-6O=TrfB@6YS>)xtzm?dpRq@4Fc^QZuBh|BpOFYpAK=|W6%6BG^DfJO#tE?w)g7Q
ztE!Z*=WZhx-UhRUu=s_Bs#KZulW|CA@4EVWHnH46h7773=>6oRoUE+3t1CT5YuOg#
zb3vnYD2Z#$eqmwZQbR){qTqv5dng!8+khn!VG_oW>-kffyP`e0KqYXI^{lWJ6J(lc
z?|`*mzgjwbdG)cbqdamYrJ6{A5M7{P_+ga}n}qKA`Vl-{;47_h=+TSl6QK}m$KFWQ
zEY@qJ&)&Z8T}wy~;Xn8*7V!Aa?(ULh8w9=~hRMOvQNBj&c(HYNt+|ggbAd>Fi^E;0
zefi;oAtWy$VYt<0WY5ZQDboQ-XZmKev8|2g`a*{X?=HvT!NJAIP3@M-!a_mOujvfz
zmZ?dc7b5;ms0;*v!GqNGIZNZUwKagdicO_lK=0?~4#%G>ZHAjO3(7rm+BGe>h{NG1
zHdp3*cJOuy2?<S2O|iyc*Px&ve1ol~rY8H4Y3ZHT?rssuSbs?s6+tOZet!N|rh=4=
z4;WNVPR{S?`Z#-ab@c_TKOJs7J)J%54w6dImd|#)bC)#E^tXgWc=#1a1IK)1P!ONP
z3YX?KBs#i}TfFOXCvMi(WO#VEC+}4OUYF>r;pv;fJ+~6FPE_7&C|81Kf-4oOvLy^M
z`z6c_4HxYt4Rq0%&W0;NuV24*@)q7UF`|EoLpwitf{r?l_~J7%Rw&Q(m)kCo9Jb5>
z;f$a|eNOh=n0fPX$ofqIIzH2Xy;NLly-}p9m_)EON#1x2u=M*35vJ6^e7s~iuB4=7
zNoJs>MS(m9@2h3!<Xpu?R##G2X<2ZjunnV}q9SIl&BcMZp5$B1Td>LF<6{wFVNjyb
zy{MzEz@Oz|-&x3^=LH3KXW=hmegHK!w5`|E(b+i|azB-mvc7I@Z4Ct4pG8_$*1jv?
z3Um_4tdWuS4Tu!V?8V*VgPk=X(q(Gs>T0^XQ+nXiZsx<`lryl5jEqiP&c%3LMP{mW
z;?)<CJg%~pLl>brDAbV2bJF=CGO4}blXKR_=+u;;j{#rGz$EN-L&M4&Xr6P<uViOm
zDunR#kjnB_{_GjF+Pw4x4>OVuN0_!BGVPLUrHWk~*wSS*_sU}I=OT3c<d<3#?R}C&
z%GtV$szT+IfSz%3HaSVA(FlrMK7dt8e9HwpOAwn?6{D-b^c^Z>eTEpAu{4iPM<-NK
zq)3dGD6%1QE`}TksfqvKYt>~sJR}dEEh$6CBMz>hg(}|(YKfH+2+*(uzfl<2U_&?J
zNIVbM8aiS<KR@zmU|{KEz6{hA@`2t&-Yw)C1zA7v<AOHD3=EH;LB?yjx=QL_;rr6B
z%xLr}=7A^kV_%-cLG3-^1%n(OkO4QF%8dhuJxr*#w`{|mbh=rwp7hCjLl(;ZC2)MP
zdpsP8;?)_F($u_wuRA}h#+MSKi8DzyyqU4-wc$P2Igl!I{rY!|U$xN1iy@(*BVm}j
z?4g~tZ%Y_eUtixx3#$aj0A5~R1|r)Fs+&PS>v8oUgwWMFIy#E|0cp`T54fG>zerr1
zCR1oaD@*7zo)J2vQr)?gH-`8B{q*+odR8=?Cdk&xMyALH;d#{b$FJ$+@X$}f67KRB
z`h>B$@Q5K;$_NBPnR;mKlYlS9Sc$?h6Jz5DB+{R)i%mrZ^Xr#8>H7B2B+S^tVxcEo
z$wrkuFcgOB?nWY!>Qf$OJtRry(u4aFj1xbNrQ+h^JUl%75^wWBv3_EIV4t~KUAR+I
zQ=QC&)i^pG!dg_G^A;i`<mI{Wb(ymSmU=Wg_~dB+aRih}%6VgD#Z|iK<@tC|I+<qs
z?)NTB8U&FsEt_f~5fPL=4E0EEYHCWw{f|t{<ppxAn{4GYfxz5t-fY{RIFf6*o*|P+
zn{X*=@0>%izrR2B$7TPW{~i$51O!*+N{+V6fi|niUVup4M=rDGfX`&Ce8Vwnp8+F!
z-xGmY+K|{1Bay{{LZAM>80yMFTb?zKNLr2U11=`==~HbMOG`_~$SsEN3F5*4lWlHp
zf`o*eK~k45KYPkhBn@B(6k&gVKcK60>;O=!z}4}kC*K?#94O>e-AahG+f?~H9{*k;
zy}H^ZG!%nE@%mU68=06K?k#5x1cZl&hlSnYN)UeP(qDp(H@C9lX^4OQ`Z_6KF9wMc
zS;~6UD=jVkEUC1xFv%`cF5VDvlT4;u`#n4bRJ0VT3yY;W_VMvq>A9v2{1~60;F@=U
z5)+b(oxLB9HX4Un+t@H#aLap`=@adwP|m<E`0k(imfK27O8#R@yf`zTRVUxA_5yCp
z>-m%psclvMj1CnRTa#bXe5v98R%5EOU16w9DV5Q=5`vIR@HC0UjvP)(N|GpWOUI1@
zZIx7p?|3}S3Y^!#PX6pR&DfW3-mqar>5>88R?p(^UZ6;IgUh1P=t@dCJz!M(m!ME+
zsah~AMpPS%88suGEnm5EWvRdgq*13V<h60e#HndnSt=1DD}MWbp8y8ZPnX9WVTA}l
zwcuvj3Vg^tDRwynu5h?cVSZj7$Uf7VYBL5q0AxFZtZ3;q+s1%*^YFOlqe@F#LXz~_
z7#}wcyWI+;S?T7@o8H7*e#}`Kf0I9Zm?h4t16pGvstQ0ZvV&QBdpAmo2;YAP+#0yK
zsQnAgA#xk^F!|is87E3r1HHV)vG%z}dU^~E6M1=jqyYL6Nqr{JxwHNK9a179C6klp
z62=PsWJ*Kr!9j#Xi2j{4L3u_4gXv;Zz7V{Xt}eZg>dT6HWq<VUY&+Z;Z{_a(@;p-f
z1(h1IS9c3AP#DovXX*Tpf(~KlO7DW(3O=P|WhG60)k)$MdaL>nd3bmj_cU2)M@SCe
zWY3292VfqNO?pfN7@kd1ZGHW6!4Q{<56LeigpujTpFckCyAX3Kxi9)&!<}4!zb#D=
zxzNMdcxSk5*W0(8oSffn-idUFtjGQto0w2`w>zd@6c&!{N?w7>R{r~4|6-7M<Hn75
zvPpw1z~KSdKB|#b5b4EF^DMklpgerd!Wq!Ewwv^2bprsQG}yNHZ>g!N8L!Uw#*1kn
zST2OXtb>AX?Q-l8=J?L^qh7huvF{=P@*)@v?jHr_6HgD10a*iXu#V1vA`AvAR}D;D
zwuzu{NJ!j}l`SbQ&ekht*VfkFOwG}Pq2isdt~c0s3t&Vm733O?3UOJN?s4|<G{DfQ
zSAiom_nojB3^UNvFBa&0PJbk~yS*LXS7WNOTfhd8gji3``a<7}F)7%YcU+w;WBYh>
z7?8fZdy90?l9`zqfL(7vpit(i^GiTN**Q3X7{$i@D8kpwoZ+NUyc~jy8Li9^x$IJf
zfQG3oMAF&s1NQ#6y<<DBHV3#==orO<P?C`WTHvGoyW!!1cI$@^f!+n3<<v3qyy(rs
z4yg$$xy6~T0SgQt=YonEb1e`z?SZH{MN=v&E|UV@#g*Z=|8#Hs=U^Lm=3V6bj@lH&
z%@TR9n)g$O^JN}>FVN|tE1jQN0m{P`?a3c`aI!sZp@#qJw9((M)lz%w?0Tn{&`WNX
zdgbQ=0J6=4+g$)sK$6?xQ}`TwjgRl|CqR({?M1-A0XBB~f=Pl(W&;QS>8E{qu>bP~
z!fss-nU#?N6h5z)L@ls=k)psp6uC3=5c{J@83@RHcj$6K922@j%6k{vO_`X45z&Z3
zX*ILBIgIa+zcMf^<wnAITMeZEy#c`f!e@x6cs}}h4|xhapJx&V{yFE{mw@gH|K~;u
z7|-LEvFQ)VPE2GZ1t|O@BAN%NdKn&Or?bEmC+yIhI}Xs-(qKYG6kw;mO;5+!WzGU7
z1O@>0QQcDw{UaKw4g!I~HdsTYXnZ_8wzjq`rTHp$q{YNyDoI1NCWX1VxmvQgW9nRf
zem<7}`T6VlAE&08TU&FSLF($=|9(ylT`XQT1%?U-hl|h?AOlVZ-!D8H!}!dzF8r~=
zDm?kfN8FZ{0+7qvbpj>EN-6KMxOdzEn<Aa|mi}B>aSBNNy|l6-i5k_tm%qxUj`-a=
zauH<(Xs~+dpZJHXfK8q~J(wa>nrQjv!@|Q;qIf2X0V09!GjWRc%O>4e3Frb0_DfN8
zN1b{f?i%0YuCT4Dq@<C}O@$$a-rimg4vy`l8ew2!ii(QrA5&CR)YH>j4D|G6{oV6#
zQr+pjg^9^nqaDVxq?I&23%L1L*7ZfFOfvg>dkX9>8Fu^$RcR+DC&0KC_oUWpbdpfv
z4vg*>G$Z&3C3kVxYLsr>T3KDifBTkXm+X=K{5gwDrR<h*C1m?CFe(n|Nk=?abYXl{
mXW`4L*Y>GiB|+Twgz5Rg?z_#MI4bZT3yqPUxo#8KDfWLdQq~aw

literal 0
HcmV?d00001

diff --git a/api/tests/integration/tests/rendering/render_reactions.py b/api/tests/integration/tests/rendering/render_reactions.py
index 26ad2380f8..2b3d8cd68d 100644
--- a/api/tests/integration/tests/rendering/render_reactions.py
+++ b/api/tests/integration/tests/rendering/render_reactions.py
@@ -93,6 +93,18 @@ def renderRxnfile(filename, outfile):
 renderer.renderToFile(rxn, joinPathPy("out/" + png_fname, __file__))
 print(checkImageSimilarity(png_fname))
 
+print("issue 2512 two short equilibrium half arrows")
+indigo.resetOptions()
+indigo.setOption("ignore-stereochemistry-errors", "true")
+indigo.setOption("render-background-color", "255, 255, 255")
+indigo.setOption("render-output-format", "png")
+fname = "issue_2512"
+png_fname = fname + ".png"
+ket_fname = joinPathPy("reactions/%s.ket" % fname, __file__)
+rxn = indigo.loadReactionFromFile(ket_fname)
+renderer.renderToFile(rxn, joinPathPy("out/" + png_fname, __file__))
+print(checkImageSimilarity(png_fname))
+
 if isIronPython():
     renderer.Dispose()
     indigo.Dispose()
diff --git a/core/render2d/src/render_context.cpp b/core/render2d/src/render_context.cpp
index fac7dc2613..43f086914d 100644
--- a/core/render2d/src/render_context.cpp
+++ b/core/render2d/src/render_context.cpp
@@ -1337,11 +1337,20 @@ void RenderContext::drawEquillibriumHalf(const Vec2f& p1, const Vec2f& p2, const
     n.negate();
     pa.addScaled(n, headwidth);
     pb.addScaled(n, headwidth);
+    const float default_shift = headsize * 2.0f;
+    float shift = default_shift;
+    if ((len - shift * 2.0f) < default_shift)
+    {
+        if (len < default_shift * 2.0f)
+            shift = len / 4.0f; // too short arrow - shift will be 1/4 of arrow length, short part - 1/2
+        else
+            shift = (len - default_shift) / 2.0f; // short part of arrow will be headsize*2
+    }
     if (is_unbalanced)
-        pa.addScaled(d, headsize * 2);
+        pa.addScaled(d, shift);
     d.negate();
     if (is_unbalanced)
-        pb.addScaled(d, headsize * 2);
+        pb.addScaled(d, shift);
     drawHalfArrowHeader(pa, d, width, headwidth * width_scale, headsize, arrow_type);
     drawBar(pb, pa, width, margin);
     checkPathNonEmpty();