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[webcanv] Correctly use TF1::Save() [6.38] #20433

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[webcanv] Correctly use TF1::Save() [6.38] #20433

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e8a21cb
[webcanv] fix storage of TF1 values
linev Nov 14, 2025
7487551
Adjust stressGraphics_web.ref for waves
linev Nov 14, 2025
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10 changes: 9 additions & 1 deletion gui/webgui6/src/TWebCanvas.cxx
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Original file line number Diff line number Diff line change
Expand Up @@ -34,6 +34,7 @@
#include "TList.h"
#include "TF1.h"
#include "TF2.h"
#include "TF3.h"
#include "TH1.h"
#include "TH2.h"
#include "THStack.h"
Expand Down Expand Up @@ -857,7 +858,14 @@ void TWebCanvas::CreatePadSnapshot(TPadWebSnapshot &paddata, TPad *pad, Long64_t
if ((fTF1UseSave == 1) && f1->HasSave())
return;

f1->Save(0, 0, 0, 0, 0, 0);
auto f3 = dynamic_cast<TF3 *>(f1);
auto f2 = dynamic_cast<TF2 *>(f1);
if (f3)
f3->Save(f3->GetXmin(), f3->GetXmax(), f3->GetYmin(), f3->GetYmax(), f3->GetZmin(), f3->GetZmax());
else if (f2)
f2->Save(f2->GetXmin(), f2->GetXmax(), f2->GetYmin(), f2->GetYmax(), 0, 0);
else
f1->Save(f1->GetXmin(), f1->GetXmax(), 0, 0, 0, 0);
};

auto create_stats = [&]() {
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2 changes: 1 addition & 1 deletion test/stressGraphics_web.ref
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Original file line number Diff line number Diff line change
Expand Up @@ -32,7 +32,7 @@ Test# SVG1Ref# SVG1Err# PDFRef# PDFErr# JPGRef# JPGErr# PNGRef# PN
31 8643 174 13191 551 37607 7570 23743 4170 8643 174
32 12629 52 20641 219 89532 21704 58976 13483 12600 80
33 33040 69 50688 694 125388 21334 98573 19359 32994 148
34 1111600 100 3933582 50 248290 61958 298343 100544 1124318 700
34 1124344 100 3981172 50 248290 61958 298343 100544 1124318 700
35 3851 100 9012 300 40000 11000 37000 9000 3851 100
36 11750 100 41000 300 73043 25000 90000 37000 11725 100
37 26771 100 82724 3000 77792 25000 72945 24000 26771 100
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