Logo ROOT   6.10/09
Reference Guide
TGLPadPainter.h
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1 // @(#)root/gl:$Id$
2 // Author: Timur Pocheptsov 06/05/2009
3 
4 /*************************************************************************
5  * Copyright (C) 1995-2009, Rene Brun and Fons Rademakers. *
6  * All rights reserved. *
7  * *
8  * For the licensing terms see $ROOTSYS/LICENSE. *
9  * For the list of contributors see $ROOTSYS/README/CREDITS. *
10  *************************************************************************/
11 
12 #ifndef ROOT_TGLPadPainter
13 #define ROOT_TGLPadPainter
14 
15 #include <deque>
16 
17 #include "TVirtualPadPainter.h"
18 #include "TGLFontManager.h"
19 #include "TGLPadUtils.h"
20 #include "TPoint.h"
21 
22 class TLinearGradient;
23 class TRadialGradient;
24 /*
25 The _main_ purpose of TGLPadPainter is to enable 2d gl raphics
26 inside standard TPad/TCanvas.
27 */
29 private:
34 
35  std::vector<Double_t> fVs;//Vertex buffer for tesselator.
36 
39 
40  Int_t fVp[4];
41 
42  std::vector<TPoint> fPoly;
44 
46 
47  template<class Char_t>
48  void DrawTextHelper(Double_t x, Double_t y, const Char_t *text, ETextMode mode);
49 public:
50  TGLPadPainter();
51 
52  //Final overriders for TVirtualPadPainter pure virtual functions.
53  //1. Part, which simply delegates to TVirtualX.
54  //Line attributes.
55  Color_t GetLineColor() const;
56  Style_t GetLineStyle() const;
57  Width_t GetLineWidth() const;
58 
59  void SetLineColor(Color_t lcolor);
60  void SetLineStyle(Style_t lstyle);
61  void SetLineWidth(Width_t lwidth);
62  //Fill attributes.
63  Color_t GetFillColor() const;
64  Style_t GetFillStyle() const;
65  Bool_t IsTransparent() const;
66 
67  void SetFillColor(Color_t fcolor);
68  void SetFillStyle(Style_t fstyle);
69  void SetOpacity(Int_t percent);
70  //Text attributes.
71  Short_t GetTextAlign() const;
72  Float_t GetTextAngle() const;
73  Color_t GetTextColor() const;
74  Font_t GetTextFont() const;
75  Float_t GetTextSize() const;
76  Float_t GetTextMagnitude() const;
77 
78  void SetTextAlign(Short_t align);
79  void SetTextAngle(Float_t tangle);
80  void SetTextColor(Color_t tcolor);
81  void SetTextFont(Font_t tfont);
82  void SetTextSize(Float_t tsize);
83  void SetTextSizePixels(Int_t npixels);
84 
85  //2. "Off-screen management" part.
87  void ClearDrawable();
88  void CopyDrawable(Int_t id, Int_t px, Int_t py);
89  void DestroyDrawable();
90  void SelectDrawable(Int_t device);
91 
92  void InitPainter();
93  void InvalidateCS();
94  void LockPainter();
95 
97  void DrawLineNDC(Double_t u1, Double_t v1, Double_t u2, Double_t v2);
98 
99  void DrawBox(Double_t x1, Double_t y1, Double_t x2, Double_t y2, EBoxMode mode);
100  //TPad needs double and float versions.
101  void DrawFillArea(Int_t n, const Double_t *x, const Double_t *y);
102  void DrawFillArea(Int_t n, const Float_t *x, const Float_t *y);
103 
104  //TPad needs both double and float versions of DrawPolyLine.
105  void DrawPolyLine(Int_t n, const Double_t *x, const Double_t *y);
106  void DrawPolyLine(Int_t n, const Float_t *x, const Float_t *y);
107  void DrawPolyLineNDC(Int_t n, const Double_t *u, const Double_t *v);
108 
109  //TPad needs both versions.
110  void DrawPolyMarker(Int_t n, const Double_t *x, const Double_t *y);
111  void DrawPolyMarker(Int_t n, const Float_t *x, const Float_t *y);
112 
113  void DrawText(Double_t x, Double_t y, const char *text, ETextMode mode);
114  void DrawText(Double_t, Double_t, const wchar_t *, ETextMode);
115  void DrawTextNDC(Double_t x, Double_t y, const char *text, ETextMode mode);
116  void DrawTextNDC(Double_t, Double_t, const wchar_t *, ETextMode);
117 
118  //jpg, png, gif and bmp output.
119  void SaveImage(TVirtualPad *pad, const char *fileName, Int_t type) const;
120 
121  //TASImage support.
122  void DrawPixels(const unsigned char *pixelData, UInt_t width, UInt_t height,
123  Int_t dstX, Int_t dstY, Bool_t enableBlending);
124 
125 
126 private:
127 
128  //Attention! GL_PROJECTION will become
129  //the current matrix after these calls.
130  void SaveProjectionMatrix()const;
131  void RestoreProjectionMatrix()const;
132 
133  //Attention! GL_MODELVIEW will become the
134  //current matrix after these calls.
135  void SaveModelviewMatrix()const;
136  void RestoreModelviewMatrix()const;
137 
138  void SaveViewport();
139  void RestoreViewport();
140 
141  void DrawPolyMarker();
142 
143  //Aux. functions for a gradient and solid fill:
144  void DrawPolygonWithGradient(Int_t n, const Double_t *x, const Double_t *y);
145  //
146  void DrawGradient(const TLinearGradient *gradient, Int_t n, const Double_t *x, const Double_t *y);
147  void DrawGradient(const TRadialGradient *gradient, Int_t n, const Double_t *x, const Double_t *y);
148  //
149  void DrawTesselation(Int_t n, const Double_t *x, const Double_t *y);
150 
151  TGLPadPainter(const TGLPadPainter &rhs);
153 
155 };
156 
157 #endif
158 
void SelectDrawable(Int_t device)
For gVirtualX this means select pixmap (or window) and all subsequent drawings will go into this pixm...
Color_t GetLineColor() const
Delegate to gVirtualX.
short Style_t
Definition: RtypesCore.h:76
void SetTextColor(Color_t tcolor)
Delegate to gVirtualX.
Rgl::Pad::PolygonStippleSet fSSet
Definition: TGLPadPainter.h:30
void LockPainter()
Locked state of painter means, that GL context can be invalid, so no GL calls can be executed...
float Float_t
Definition: RtypesCore.h:53
void DrawPolygonWithGradient(Int_t n, const Double_t *x, const Double_t *y)
At the moment I assume both linear and radial gradients will work the same way - using a stencil buff...
Int_t CreateDrawable(UInt_t w, UInt_t h)
Not required at the moment.
TH1 * h
Definition: legend2.C:5
void DrawPolyLine(Int_t n, const Double_t *x, const Double_t *y)
Draw poly-line in user coordinates.
void SetTextSize(Float_t tsize)
Delegate to gVirtualX.
void ClearDrawable()
Not required at the moment.
Rgl::Pad::Tesselator fTess
Definition: TGLPadPainter.h:31
void SetLineColor(Color_t lcolor)
Delegate to gVirtualX.
void DrawLineNDC(Double_t u1, Double_t v1, Double_t u2, Double_t v2)
Draw line segment in NDC coordinates.
void DrawText(Double_t x, Double_t y, const char *text, ETextMode mode)
Draw text.
int Int_t
Definition: RtypesCore.h:41
bool Bool_t
Definition: RtypesCore.h:59
Float_t GetTextAngle() const
Delegate to gVirtualX.
void SaveModelviewMatrix() const
Save the modelview matrix.
Define a radial color gradient.
void DrawPolyLineNDC(Int_t n, const Double_t *u, const Double_t *v)
Poly line in NDC.
void DrawGradient(const TLinearGradient *gradient, Int_t n, const Double_t *x, const Double_t *y)
short Font_t
Definition: RtypesCore.h:75
void SaveImage(TVirtualPad *pad, const char *fileName, Int_t type) const
Using TImage save frame-buffer contents as a picture.
void SetTextSizePixels(Int_t npixels)
Delegate to gVirtualX.
void InvalidateCS()
When TPad::Range for gPad is called, projection must be changed in OpenGL.
static const double x2[5]
Double_t x[n]
Definition: legend1.C:17
void RestoreModelviewMatrix() const
Restore the modelview matrix.
#define ClassDef(name, id)
Definition: Rtypes.h:297
void DrawBox(Double_t x1, Double_t y1, Double_t x2, Double_t y2, EBoxMode mode)
Draw filled or hollow box.
Rgl::Pad::MarkerPainter fMarker
Definition: TGLPadPainter.h:32
std::vector< TPoint > fPoly
Definition: TGLPadPainter.h:42
void RestoreViewport()
Restore the saved viewport.
void SaveProjectionMatrix() const
Save the projection matrix.
Short_t GetTextAlign() const
Delegate to gVirtualX.
TVirtualPad is an abstract base class for the Pad and Canvas classes.
Definition: TVirtualPad.h:49
void DrawPolyMarker()
Poly-marker.
short Color_t
Definition: RtypesCore.h:79
Int_t fVp[4]
Definition: TGLPadPainter.h:40
Font_t GetTextFont() const
Delegate to gVirtualX.
void CopyDrawable(Int_t id, Int_t px, Int_t py)
Not required at the moment.
void DrawPixels(const unsigned char *pixelData, UInt_t width, UInt_t height, Int_t dstX, Int_t dstY, Bool_t enableBlending)
Bool_t fIsHollowArea
Definition: TGLPadPainter.h:43
SVector< double, 2 > v
Definition: Dict.h:5
"Delegating" part of TGLPadPainter.
Definition: TGLPadPainter.h:28
void DrawFillArea(Int_t n, const Double_t *x, const Double_t *y)
Draw tesselated polygon (probably, outline only).
Color_t GetTextColor() const
Delegate to gVirtualX.
unsigned int UInt_t
Definition: RtypesCore.h:42
void SaveViewport()
Extract and save the current viewport.
short Short_t
Definition: RtypesCore.h:35
Rgl::Pad::GLLimits fLimits
Definition: TGLPadPainter.h:33
void SetFillStyle(Style_t fstyle)
Delegate to gVirtualX.
void SetTextAlign(Short_t align)
Delegate to gVirtualX.
short Width_t
Definition: RtypesCore.h:78
std::vector< Double_t > fVs
Definition: TGLPadPainter.h:35
void DrawTextNDC(Double_t x, Double_t y, const char *text, ETextMode mode)
Draw text in NDC.
Color_t GetFillColor() const
Delegate to gVirtualX.
Define a linear color gradient.
void SetFillColor(Color_t fcolor)
Delegate to gVirtualX.
Style_t GetLineStyle() const
Delegate to gVirtualX.
void SetTextAngle(Float_t tangle)
Delegate to gVirtualX.
static const double x1[5]
void RestoreProjectionMatrix() const
Restore the projection matrix.
double Double_t
Definition: RtypesCore.h:55
TText * text
int type
Definition: TGX11.cxx:120
Double_t y[n]
Definition: legend1.C:17
void InitPainter()
Init gl-pad painter:
TGLPadPainter & operator=(const TGLPadPainter &rhs)
void DrawLine(Double_t x1, Double_t y1, Double_t x2, Double_t y2)
Draw line segment.
char Char_t
Definition: RtypesCore.h:29
Style_t GetFillStyle() const
Delegate to gVirtualX.
TGLFontManager fFM
Definition: TGLPadPainter.h:37
Bool_t IsTransparent() const
Delegate to gVirtualX.
void DrawTextHelper(Double_t x, Double_t y, const Char_t *text, ETextMode mode)
A FreeType GL font manager.
void SetTextFont(Font_t tfont)
Delegate to gVirtualX.
void SetLineStyle(Style_t lstyle)
Delegate to gVirtualX.
void SetLineWidth(Width_t lwidth)
Delegate to gVirtualX.
A wrapper class for FTFont.
Float_t GetTextSize() const
Delegate to gVirtualX.
void DestroyDrawable()
Not required at the moment.
void SetOpacity(Int_t percent)
Delegate to gVirtualX.
Float_t GetTextMagnitude() const
Delegate to gVirtualX.
Width_t GetLineWidth() const
Delegate to gVirtualX.
const Int_t n
Definition: legend1.C:16
To make it possible to use GL for 2D graphic in a TPad/TCanvas.
void DrawTesselation(Int_t n, const Double_t *x, const Double_t *y)