doc/master/img2pad_8C.html

void img2pad()

{

   TString fname = gROOT->GetTutorialDir();

   fname.Append("/visualisation/image/rose512.jpg");

   TImage *img = TImage::Open(fname);


   if (!img) {

      printf("Could not create an image... exit\n");

      return;

   }


   img->SetConstRatio(kFALSE);

   img->Draw("N");


   TCanvas *c = (TCanvas *)gROOT->GetListOfCanvases()->FindObject("rose512jpg");

   c->SetFixedAspectRatio();


   TCanvas *c1 = new TCanvas("roses", "roses", 800, 800);

   img->Draw("T100,100,#ffff00");

   /*img->Draw("T100,100,#556655");*/

   /*img->Draw("T100,100");*/


   TImage *i1 = TImage::Open(fname);

   i1->SetConstRatio(kFALSE);

   i1->Flip(90);

   TImage *i2 = TImage::Open(fname);

   i2->SetConstRatio(kFALSE);

   i2->Flip(180);

   TImage *i3 = TImage::Open(fname);

   i3->SetConstRatio(kFALSE);

   i3->Flip(270);

   TImage *i4 = TImage::Open(fname);

   i4->SetConstRatio(kFALSE);

   i4->Mirror(kTRUE);


   float d = 0.40;

   TPad *p1 = new TPad("i1", "i1", 0.05, 0.55, 0.05 + d * i1->GetWidth() / i1->GetHeight(), 0.95);

   TPad *p2 = new TPad("i2", "i2", 0.55, 0.55, 0.95, 0.55 + d * i2->GetHeight() / i2->GetWidth());

   TPad *p3 = new TPad("i3", "i3", 0.55, 0.05, 0.55 + d * i3->GetWidth() / i3->GetHeight(), 0.45);

   TPad *p4 = new TPad("i4", "i4", 0.05, 0.05, 0.45, 0.05 + d * i4->GetHeight() / i4->GetWidth());


   p1->Draw();

   p1->cd();

   i1->Draw();

   c1->cd();


   p2->Draw();

   p2->cd();

   i2->Draw();

   c1->cd();


   p3->Draw();

   p3->cd();

   i3->Draw();

   c1->cd();


   p4->Draw();

   p4->cd();

   i4->Draw();

   c1->cd();

}

d
#define d(i)
Definition RSha256.hxx:102

c
#define c(i)
Definition RSha256.hxx:101

kFALSE
constexpr Bool_t kFALSE
Definition RtypesCore.h:109

kTRUE
constexpr Bool_t kTRUE
Definition RtypesCore.h:108

gROOT
#define gROOT
Definition TROOT.h:417

TAttImage::SetConstRatio
virtual void SetConstRatio(Bool_t constRatio=kTRUE)
Set (constRatio = kTRUE) or unset (constRadio = kFALSE) the ratio flag.
Definition TAttImage.cxx:635

TCanvas
The Canvas class.
Definition TCanvas.h:23

TImage
An abstract interface to image processing library.
Definition TImage.h:30

TImage::Open
static TImage * Open(const char *file, EImageFileTypes type=kUnknown)
Open a specified image file.
Definition TImage.cxx:123

TImage::GetWidth
virtual UInt_t GetWidth() const
Definition TImage.h:246

TImage::GetHeight
virtual UInt_t GetHeight() const
Definition TImage.h:247

TObject::Draw
virtual void Draw(Option_t *option="")
Default Draw method for all objects.
Definition TObject.cxx:292

TPad
The most important graphics class in the ROOT system.
Definition TPad.h:32

TPad::FindObject
TObject * FindObject(const char *name) const override
Search if object named name is inside this pad or in pads inside this pad.
Definition TPad.cxx:2511

TPad::cd
TVirtualPad * cd(Int_t subpadnumber=0) override
Set Current pad.
Definition TPad.cxx:757

TPad::Draw
void Draw(Option_t *option="") override
Draw Pad in Current pad (re-parent pad if necessary).
Definition TPad.cxx:1578

TString
Basic string class.
Definition TString.h:137

TString::Append
TString & Append(const char *cs)
Definition TString.h:582

c1
return c1
Definition legend1.C:41