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"# img2pad\n",
"Display image in canvas and pad.\n",
"\n",
"\n",
"\n",
"\n",
"**Author:** Valeriy Onuchin \n",
"This notebook tutorial was automatically generated with ROOTBOOK-izer from the macro found in the ROOT repository on Tuesday, May 19, 2026 at 08:38 PM."
]
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"source": [
"TString fname = gROOT->GetTutorialDir();\n",
"fname.Append(\"/visualisation/image/rose512.jpg\");\n",
"TImage *img = TImage::Open(fname);\n",
"\n",
"if (!img) {\n",
" printf(\"Could not create an image... exit\\n\");\n",
" return;\n",
"}\n",
"\n",
"img->SetConstRatio(kFALSE);\n",
"img->Draw(\"N\");\n",
"\n",
"TCanvas *c = (TCanvas *)gROOT->GetListOfCanvases()->FindObject(\"rose512jpg\");\n",
"c->SetFixedAspectRatio();\n",
"\n",
"TCanvas *c1 = new TCanvas(\"roses\", \"roses\", 800, 800);\n",
"img->Draw(\"T100,100,#ffff00\");\n",
"/*img->Draw(\"T100,100,#556655\");*/\n",
"/*img->Draw(\"T100,100\");*/\n",
"\n",
"TImage *i1 = TImage::Open(fname);\n",
"i1->SetConstRatio(kFALSE);\n",
"i1->Flip(90);\n",
"TImage *i2 = TImage::Open(fname);\n",
"i2->SetConstRatio(kFALSE);\n",
"i2->Flip(180);\n",
"TImage *i3 = TImage::Open(fname);\n",
"i3->SetConstRatio(kFALSE);\n",
"i3->Flip(270);\n",
"TImage *i4 = TImage::Open(fname);\n",
"i4->SetConstRatio(kFALSE);\n",
"i4->Mirror(kTRUE);\n",
"\n",
"float d = 0.40;\n",
"TPad *p1 = new TPad(\"i1\", \"i1\", 0.05, 0.55, 0.05 + d * i1->GetWidth() / i1->GetHeight(), 0.95);\n",
"TPad *p2 = new TPad(\"i2\", \"i2\", 0.55, 0.55, 0.95, 0.55 + d * i2->GetHeight() / i2->GetWidth());\n",
"TPad *p3 = new TPad(\"i3\", \"i3\", 0.55, 0.05, 0.55 + d * i3->GetWidth() / i3->GetHeight(), 0.45);\n",
"TPad *p4 = new TPad(\"i4\", \"i4\", 0.05, 0.05, 0.45, 0.05 + d * i4->GetHeight() / i4->GetWidth());\n",
"\n",
"p1->Draw();\n",
"p1->cd();\n",
"i1->Draw();\n",
"c1->cd();\n",
"\n",
"p2->Draw();\n",
"p2->cd();\n",
"i2->Draw();\n",
"c1->cd();\n",
"\n",
"p3->Draw();\n",
"p3->cd();\n",
"i3->Draw();\n",
"c1->cd();\n",
"\n",
"p4->Draw();\n",
"p4->cd();\n",
"i4->Draw();\n",
"c1->cd();"
]
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"cell_type": "markdown",
"id": "3e3fbf3c",
"metadata": {},
"source": [
"Draw all canvases "
]
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