From c7200b100d8ed49816c4d92e7882403d98e1f12c Mon Sep 17 00:00:00 2001
From: Danilo Piparo <danilo.piparo@cern.ch>
Date: Wed, 13 Mar 2024 17:13:00 +0100
Subject: [PATCH] [graphics] Save memory when obtaining TImageDump instance

by using TClass instead of the interpreter. As a side effect,
the whole process is much faster.

fixes an incarnation of #14156, mitigating the overall effect
of the highlighted behaviour
---
 graf2d/asimage/CMakeLists.txt   |  1 +
 graf2d/asimage/src/TASImage.cxx | 40 +++++++++++++++++----------------
 2 files changed, 22 insertions(+), 19 deletions(-)

diff --git a/graf2d/asimage/CMakeLists.txt b/graf2d/asimage/CMakeLists.txt
index 4e64d82a6651f..31114ad45d4ee 100644
--- a/graf2d/asimage/CMakeLists.txt
+++ b/graf2d/asimage/CMakeLists.txt
@@ -33,6 +33,7 @@ ROOT_STANDARD_LIBRARY_PACKAGE(ASImage
   DEPENDENCIES
     Core
     Graf
+    Postscript
   BUILTINS
     AFTERIMAGE
 )
diff --git a/graf2d/asimage/src/TASImage.cxx b/graf2d/asimage/src/TASImage.cxx
index 6984204e0b486..7e046f4724bf8 100644
--- a/graf2d/asimage/src/TASImage.cxx
+++ b/graf2d/asimage/src/TASImage.cxx
@@ -61,37 +61,39 @@ ROOT tutorials: `$ROOTSYS/tutorials/image/`
 #include FT_FREETYPE_H
 #include FT_GLYPH_H
 
+#include "RConfigure.h"
+#include "TArrayD.h"
+#include "TArrayL.h"
 #include "TASImage.h"
 #include "TASImagePlugin.h"
-#include "TROOT.h"
 #include "TBuffer.h"
-#include "TMath.h"
-#include "TSystem.h"
-#include "TVirtualX.h"
-#include "TVirtualPad.h"
-#include "TArrayD.h"
-#include "TVectorD.h"
-#include "TVirtualPS.h"
-#include "TGaxis.h"
 #include "TColor.h"
-#include "TObjArray.h"
-#include "TArrayL.h"
-#include "TPoint.h"
+#include "TEnv.h"
 #include "TFrame.h"
-#include "TTF.h"
-#include "TRandom.h"
-#include <iostream>
+#include "TGaxis.h"
 #include "THashTable.h"
+#include "TImageDump.h"
+#include "TMath.h"
+#include "TObjArray.h"
 #include "TPluginManager.h"
-#include "TEnv.h"
+#include "TPoint.h"
+#include "TRandom.h"
+#include "TROOT.h"
 #include "TStyle.h"
+#include "TSystem.h"
 #include "TText.h"
-#include "RConfigure.h"
+#include "TTF.h"
+#include "TVectorD.h"
+#include "TVirtualPad.h"
 #include "TVirtualPadPainter.h"
-#include "snprintf.h"
+#include "TVirtualPS.h"
+#include "TVirtualX.h"
 
+#include <iostream>
 #include <memory>
 
+#include "snprintf.h"
+
 #ifndef WIN32
 #ifndef R__HAS_COCOA
 #   include <X11/Xlib.h>
@@ -1095,7 +1097,7 @@ void TASImage::FromPad(TVirtualPad *pad, Int_t x, Int_t y, UInt_t w, UInt_t h)
 
    if (gROOT->IsBatch()) { // in batch mode
       TVirtualPS *psave = gVirtualPS;
-      gVirtualPS = (TVirtualPS*)gROOT->ProcessLineFast("new TImageDump()");
+      gVirtualPS = new TImageDump();
       gVirtualPS->Open(pad->GetName(), 114); // in memory
       gVirtualPS->SetBit(BIT(11)); //kPrintingPS