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Reference Guide
img2pad.C
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1/// \file
2/// \ingroup tutorial_image
3/// \notebook
4/// Display image in canvas and pad.
5///
6/// \macro_image
7/// \macro_code
8///
9/// \author Valeriy Onuchin
10
11void img2pad()
12{
13 TImage *img = TImage::Open("$ROOTSYS/tutorials/image/rose512.jpg");
14 if (!img) {
15 printf("Could not create an image... exit\n");
16 return;
17 }
19 img->Draw("N");
20
21 TCanvas *c = (TCanvas *)gROOT->GetListOfCanvases()->FindObject("rose512jpg");
22 c->SetFixedAspectRatio();
23
24 TCanvas *c1 = new TCanvas("roses", "roses", 800, 800);
25 img->Draw("T100,100,#ffff00");
26 /*img->Draw("T100,100,#556655");*/
27 /*img->Draw("T100,100");*/
28
29 TImage *i1 = TImage::Open("$ROOTSYS/tutorials/image/rose512.jpg");
31 i1->Flip(90);
32 TImage *i2 = TImage::Open("$ROOTSYS/tutorials/image/rose512.jpg");
34 i2->Flip(180);
35 TImage *i3 = TImage::Open("$ROOTSYS/tutorials/image/rose512.jpg");
37 i3->Flip(270);
38 TImage *i4 = TImage::Open("$ROOTSYS/tutorials/image/rose512.jpg");
40 i4->Mirror(kTRUE);
41
42 float d = 0.40;
43 TPad *p1 = new TPad("i1", "i1", 0.05, 0.55, 0.05+d*i1->GetWidth()/i1->GetHeight(), 0.95);
44 TPad *p2 = new TPad("i2", "i2", 0.55, 0.55, 0.95, 0.55+d*i2->GetHeight()/i2->GetWidth());
45 TPad *p3 = new TPad("i3", "i3", 0.55, 0.05, 0.55+d*i3->GetWidth()/i3->GetHeight(), 0.45);
46 TPad *p4 = new TPad("i4", "i4", 0.05, 0.05, 0.45, 0.05+d*i4->GetHeight()/i4->GetWidth());
47
48 p1->Draw();
49 p1->cd();
50 i1->Draw();
51 c1->cd();
52
53 p2->Draw();
54 p2->cd();
55 i2->Draw();
56 c1->cd();
57
58 p3->Draw();
59 p3->cd();
60 i3->Draw();
61 c1->cd();
62
63 p4->Draw();
64 p4->cd();
65 i4->Draw();
66 c1->cd();
67}
#define d(i)
Definition: RSha256.hxx:102
#define c(i)
Definition: RSha256.hxx:101
const Bool_t kFALSE
Definition: RtypesCore.h:101
const Bool_t kTRUE
Definition: RtypesCore.h:100
#define gROOT
Definition: TROOT.h:404
virtual void SetConstRatio(Bool_t constRatio=kTRUE)
Set (constRatio = kTRUE) or unset (constRadio = kFALSE) the ratio flag.
Definition: TAttImage.cxx:645
The Canvas class.
Definition: TCanvas.h:23
An abstract interface to image processing library.
Definition: TImage.h:29
static TImage * Open(const char *file, EImageFileTypes type=kUnknown)
Open a specified image file.
Definition: TImage.cxx:118
virtual UInt_t GetWidth() const
Definition: TImage.h:228
virtual void Mirror(Bool_t=kTRUE)
Definition: TImage.h:138
virtual void Flip(Int_t=180)
Definition: TImage.h:131
virtual UInt_t GetHeight() const
Definition: TImage.h:229
virtual void Draw(Option_t *option="")
Default Draw method for all objects.
Definition: TObject.cxx:197
The most important graphics class in the ROOT system.
Definition: TPad.h:26
TVirtualPad * cd(Int_t subpadnumber=0) override
Set Current pad.
Definition: TPad.cxx:606
void Draw(Option_t *option="") override
Draw Pad in Current pad (re-parent pad if necessary).
Definition: TPad.cxx:1292
return c1
Definition: legend1.C:41