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"# psview\n",
"An example how to display PS, EPS, PDF files in canvas.\n",
"To load a PS file in a TCanvas, the ghostscript program needs to be install.\n",
"- On most unix systems it is installed by default.\n",
"- On Windows it has to be installed from http://pages.cs.wisc.edu/~ghost/\n",
" also the place where gswin32c.exe sits should be added in the PATH. One\n",
" way to do it is:\n",
" 1. Start the Control Panel\n",
" 2. Double click on System\n",
" 3, Open the \"Advanced\" tab\n",
" 4. Click on the \"Environment Variables\" button\n",
" 5. Find \"Path\" in \"System variable list\", click on it.\n",
" 6. Click on the \"Edit\" button.\n",
" 7. In the \"Variable value\" field add the path of gswin32c\n",
" (after a \";\") it should be something like:\n",
" \"C:\\Program Files\\gs\\gs8.13\\bin\"\n",
" 8. click \"OK\" as much as needed.\n",
"\n",
"\n",
"\n",
"\n",
"**Author:** Valeriy Onoutchin \n",
"This notebook tutorial was automatically generated with ROOTBOOK-izer from the macro found in the ROOT repository on Tuesday, May 19, 2026 at 08:37 PM."
]
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"set to batch mode -> do not display graphics"
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"gROOT->SetBatch(1);"
]
},
{
"cell_type": "markdown",
"id": "63bbef26",
"metadata": {},
"source": [
"create a PostScript file"
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"text": [
"Info in : eps file feynman.eps has been created\n"
]
}
],
"source": [
"TString dir = gROOT->GetTutorialDir();\n",
"dir.Append(\"/visualisation/graphics/feynman.C\");\n",
"gROOT->Macro(dir);\n",
"gPad->Print(\"feynman.eps\");"
]
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"id": "3bcdf4c8",
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"back to graphics mode"
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"gROOT->SetBatch(0);"
]
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{
"cell_type": "markdown",
"id": "4b52f666",
"metadata": {},
"source": [
"create an image from PS file"
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"text": [
"Warning in : GhostScript is not available\n",
"Error in : Can't figure out DISPLAY, set it manually\n",
"In case you run a remote ssh session, restart your ssh session with:\n",
"=========> ssh -Y\n",
"Error in : Can't figure out DISPLAY, set it manually\n",
"In case you run a remote ssh session, restart your ssh session with:\n",
"=========> ssh -Y\n",
"Error in : no image set\n"
]
}
],
"source": [
"TImage *ps = TImage::Open(\"feynman.eps\");\n",
"\n",
"if (!ps) {\n",
" printf(\"GhostScript (gs) program must be installed\\n\");\n",
" return;\n",
"}\n",
"\n",
"new TCanvas(\"psexam\", \"Example how to display PS file in canvas\", 600, 400);\n",
"TLatex *tex = new TLatex(0.06, 0.9, \"The picture below has been loaded from a PS file:\");\n",
"tex->Draw();\n",
"\n",
"TPad *eps = new TPad(\"eps\", \"eps\", 0., 0., 1., 0.75);\n",
"eps->Draw();\n",
"eps->cd();\n",
"ps->Draw(\"xxx\");"
]
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"cell_type": "markdown",
"id": "304a0d08",
"metadata": {},
"source": [
"Draw all canvases "
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