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class TGLPadPainter: public TVirtualPadPainter

"Delegating" part of TGLPadPainter. Line/fill/etc. attributes can be
set inside TPad, but not only there:
many of them are set by base sub-objects of 2d primitives
(2d primitives usually inherit TAttLine or TAttFill etc.).  And these sub-objects
call gVirtualX->SetLineWidth ... etc. So, if I save some attributes in my painter,
it will be mess - at any moment I do not know, where to take line attribute - from
gVirtualX or from my own member. So! All attributed, _ALL_ go to/from gVirtualX.

Function Members (Methods)

public:

virtual	~TGLPadPainter()
static TClass*	Class()
virtual void	ClearDrawable()
virtual void	CopyDrawable(Int_t id, Int_t px, Int_t py)
virtual Int_t	CreateDrawable(UInt_t w, UInt_t h)
virtual void	DestroyDrawable()
virtual void	DrawBox(Double_t x1, Double_t y1, Double_t x2, Double_t y2, TVirtualPadPainter::EBoxMode mode)
virtual void	DrawFillArea(Int_t n, const Double_t* x, const Double_t* y)
virtual void	DrawFillArea(Int_t n, const Float_t* x, const Float_t* y)
virtual void	DrawLine(Double_t x1, Double_t y1, Double_t x2, Double_t y2)
virtual void	DrawLineNDC(Double_t u1, Double_t v1, Double_t u2, Double_t v2)
virtual void	DrawPixels(const unsigned char* pixelData, UInt_t width, UInt_t height, Int_t dstX, Int_t dstY, Bool_t enableBlending)
virtual void	DrawPolyLine(Int_t n, const Double_t* x, const Double_t* y)
virtual void	DrawPolyLine(Int_t n, const Float_t* x, const Float_t* y)
virtual void	DrawPolyLineNDC(Int_t n, const Double_t* u, const Double_t* v)
virtual void	DrawPolyMarker(Int_t n, const Double_t* x, const Double_t* y)
virtual void	DrawPolyMarker(Int_t n, const Float_t* x, const Float_t* y)
virtual void	DrawText(Double_t x, Double_t y, const char* text, TVirtualPadPainter::ETextMode mode)
virtual void	DrawText(Double_t, Double_t, const wchar_t*, TVirtualPadPainter::ETextMode)
virtual void	DrawTextNDC(Double_t x, Double_t y, const char* text, TVirtualPadPainter::ETextMode mode)
virtual void	DrawTextNDC(Double_t, Double_t, const wchar_t*, TVirtualPadPainter::ETextMode)
virtual Color_t	GetFillColor() const
virtual Style_t	GetFillStyle() const
virtual Color_t	GetLineColor() const
virtual Style_t	GetLineStyle() const
virtual Width_t	GetLineWidth() const
virtual Short_t	GetTextAlign() const
virtual Float_t	GetTextAngle() const
virtual Color_t	GetTextColor() const
virtual Font_t	GetTextFont() const
virtual Float_t	GetTextMagnitude() const
virtual Float_t	GetTextSize() const
virtual void	InitPainter()
virtual void	InvalidateCS()
virtual TClass*	IsA() const
virtual Bool_t	IsTransparent() const
virtual void	LockPainter()
static TVirtualPadPainter*	TVirtualPadPainter::PadPainter(Option_t* opt = "")
virtual void	SaveImage(TVirtualPad* pad, const char* fileName, Int_t type) const
virtual void	SelectDrawable(Int_t device)
virtual void	SetFillColor(Color_t fcolor)
virtual void	SetFillStyle(Style_t fstyle)
virtual void	SetLineColor(Color_t lcolor)
virtual void	SetLineStyle(Style_t lstyle)
virtual void	SetLineWidth(Width_t lwidth)
virtual void	SetOpacity(Int_t percent)
virtual void	SetTextAlign(Short_t align)
virtual void	SetTextAngle(Float_t tangle)
virtual void	SetTextColor(Color_t tcolor)
virtual void	SetTextFont(Font_t tfont)
virtual void	SetTextSize(Float_t tsize)
virtual void	SetTextSizePixels(Int_t npixels)
virtual void	ShowMembers(TMemberInspector& insp) const
virtual void	Streamer(TBuffer&)
void	StreamerNVirtual(TBuffer& ClassDef_StreamerNVirtual_b)
	TGLPadPainter()

private:

void	DrawGradient(const TLinearGradient* gradient, Int_t n, const Double_t* x, const Double_t* y)
void	DrawGradient(const TRadialGradient* gradient, Int_t n, const Double_t* x, const Double_t* y)
void	DrawPolygonWithGradient(Int_t n, const Double_t* x, const Double_t* y)
void	DrawPolyMarker()
void	DrawTesselation(Int_t n, const Double_t* x, const Double_t* y)
TGLPadPainter&	operator=(const TGLPadPainter& rhs)
void	RestoreModelviewMatrix() const
void	RestoreProjectionMatrix() const
void	RestoreViewport()
void	SaveModelviewMatrix() const
void	SaveProjectionMatrix() const
void	SaveViewport()
	TGLPadPainter(const TGLPadPainter& rhs)

Data Members

public:

static TVirtualPadPainter::ETextMode	TVirtualPadPainter::kClear
static TVirtualPadPainter::EBoxMode	TVirtualPadPainter::kFilled
static TVirtualPadPainter::EBoxMode	TVirtualPadPainter::kHollow
static TVirtualPadPainter::ETextMode	TVirtualPadPainter::kOpaque

private:

TGLFont	fF
TGLFontManager	fFM
Bool_t	fIsHollowArea
Rgl::Pad::GLLimits	fLimits
Bool_t	fLocked
Rgl::Pad::MarkerPainter	fMarker
vector<TPoint>	fPoly
Rgl::Pad::PolygonStippleSet	fSSet
Rgl::Pad::Tesselator	fTess
Int_t	fVp[4]
vector<Double_t>	fVs	Vertex buffer for tesselator.

Class Charts

Inheritance Inherited Members Includes Libraries

Function documentation

TGLPadPainter()

Color_t GetLineColor() const

Delegate to gVirtualX.

Style_t GetLineStyle() const

Delegate to gVirtualX.

Width_t GetLineWidth() const

Delegate to gVirtualX.

void SetLineColor(Color_t lcolor)

Delegate to gVirtualX.

void SetLineStyle(Style_t lstyle)

Delegate to gVirtualX.

void SetLineWidth(Width_t lwidth)

Delegate to gVirtualX.

Color_t GetFillColor() const

Delegate to gVirtualX.

Style_t GetFillStyle() const

Delegate to gVirtualX.

Bool_t IsTransparent() const

Delegate to gVirtualX.
IsTransparent is implemented as inline function in TAttFill.

void SetFillColor(Color_t fcolor)

Delegate to gVirtualX.

void SetFillStyle(Style_t fstyle)

Delegate to gVirtualX.

void SetOpacity(Int_t percent)

Delegate to gVirtualX.

Short_t GetTextAlign() const

Delegate to gVirtualX.

Float_t GetTextAngle() const

Delegate to gVirtualX.

Color_t GetTextColor() const

Delegate to gVirtualX.

Font_t GetTextFont() const

Delegate to gVirtualX.

Float_t GetTextSize() const

Delegate to gVirtualX.

Float_t GetTextMagnitude() const

Delegate to gVirtualX.

void SetTextAlign(Short_t align)

Delegate to gVirtualX.

void SetTextAngle(Float_t tangle)

Delegate to gVirtualX.

void SetTextColor(Color_t tcolor)

Delegate to gVirtualX.

void SetTextFont(Font_t tfont)

Delegate to gVirtualX.

void SetTextSize(Float_t tsize)

Delegate to gVirtualX.

void SetTextSizePixels(Int_t npixels)

Delegate to gVirtualX.

Int_t CreateDrawable(UInt_t w, UInt_t h)

Not required at the moment.

void ClearDrawable()

Not required at the moment.

void CopyDrawable(Int_t id, Int_t px, Int_t py)

Not required at the moment.

void DestroyDrawable()

Not required at the moment.

void SelectDrawable(Int_t device)

For gVirtualX this means select pixmap (or window)
and all subsequent drawings will go into
this pixmap. For OpenGL this means the change of
coordinate system and viewport.

void InitPainter()

Init gl-pad painter:
1. 2D painter does not use depth test, should not modify
   depth-buffer content (except initial cleanup).
2. Disable cull face.
3. Disable lighting.
4. Set viewport (to the whole canvas area).
5. Set camera.
6. Unlock painter.

void InvalidateCS()

When TPad::Range for gPad is called, projection
must be changed in OpenGL.

void LockPainter()

Locked state of painter means, that
GL context can be invalid, so no GL calls
can be executed.

void DrawLine(Double_t x1, Double_t y1, Double_t x2, Double_t y2)

Draw line segment.

void DrawLineNDC(Double_t u1, Double_t v1, Double_t u2, Double_t v2)

Draw line segment in NDC coordinates.

void DrawBox(Double_t x1, Double_t y1, Double_t x2, Double_t y2, TVirtualPadPainter::EBoxMode mode)

Draw filled or hollow box.

void DrawFillArea(Int_t n, const Double_t* x, const Double_t* y)

Draw tesselated polygon (probably, outline only).

void DrawFillArea(Int_t n, const Float_t* x, const Float_t* y)

Draw tesselated polygon (never called, probably, since TPad::PaintFillArea for floats
is deprecated).

void DrawPolyLine(Int_t n, const Double_t* x, const Double_t* y)

Draw poly-line in user coordinates.

void DrawPolyLine(Int_t n, const Float_t* x, const Float_t* y)

Never called?

void DrawPolyLineNDC(Int_t n, const Double_t* u, const Double_t* v)

Poly line in NDC.

void DrawPolyMarker(Int_t n, const Double_t* x, const Double_t* y)

Poly-marker.

void DrawPolyMarker(Int_t n, const Float_t* x, const Float_t* y)

Poly-marker.

void DrawPolyMarker()

Poly-marker.

void DrawText(Double_t x, Double_t y, const char* text, TVirtualPadPainter::ETextMode mode)

Draw text. This operation is especially
dangerous if in locked state -
ftgl will assert on zero texture size
(which is result of bad GL context).

void DrawText(Double_t , Double_t , const wchar_t* , TVirtualPadPainter::ETextMode )

Draw text. This operation is especially
dangerous if in locked state -
ftgl will assert on zero texture size
(which is result of bad GL context).

void DrawTextNDC(Double_t x, Double_t y, const char* text, TVirtualPadPainter::ETextMode mode)

Draw text in NDC. This operation is especially
dangerous if in locked state -
ftgl will assert on zero texture size
(which is result of bad GL context).

void DrawTextNDC(Double_t , Double_t , const wchar_t* , TVirtualPadPainter::ETextMode )

Draw text in NDC. This operation is especially
dangerous if in locked state -
ftgl will assert on zero texture size
(which is result of bad GL context).

void SaveProjectionMatrix() const

Save the projection matrix.
Attention! GL_PROJECTION will become the current matrix
after this call!

void RestoreProjectionMatrix() const

Restore the projection matrix.
Attention! GL_PROJECTION will become the current matrix
after this call!

void SaveModelviewMatrix() const

Save the modelview matrix.
Attention! GL_MODELVIEW will become the current matrix
after this call!

void RestoreModelviewMatrix() const

Restore the modelview matrix.
Attention! GL_MODELVIEW will become the current matrix
after this call!

void SaveViewport()

Extract and save the current viewport.

void RestoreViewport()

Restore the saved viewport.

void SaveImage(TVirtualPad* pad, const char* fileName, Int_t type) const

 Using TImage save frame-buffer contents as a picture.

void DrawPixels(const unsigned char* pixelData, UInt_t width, UInt_t height, Int_t dstX, Int_t dstY, Bool_t enableBlending)

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 buffer and some big rectangle(s) to fill with a gradient.
Thus I have a 'common' part - the part responsible for a stencil test.

void DrawGradient(const TRadialGradient* gradient, Int_t n, const Double_t* x, const Double_t* y)

void DrawGradient(const TLinearGradient* gradient, Int_t n, const Double_t* x, const Double_t* y)

void DrawTesselation(Int_t n, const Double_t* x, const Double_t* y)

TGLPadPainter()