FWTGLViewer Class Reference

#include "FWTGLViewer.h"

Inheritance diagram for FWTGLViewer:

Public Member Functions
void	DrawHiLod (Bool_t swap_buffers)
	FWTGLViewer (const TGWindow *parent)
TGLFBO *	GenerateFbo (Int_t w, Int_t h, Float_t pixel_object_scale)
void	JustSwap ()
TGLFBO *	MakeFbo ()
TGLFBO *	MakeFboHeight (Int_t height, Bool_t pixel_object_scale=kTRUE)
TGLFBO *	MakeFboScale (Float_t scale, Bool_t pixel_object_scale=kTRUE)
TGLFBO *	MakeFboWidth (Int_t width, Bool_t pixel_object_scale=kTRUE)
	~FWTGLViewer () override

Private Member Functions
	FWTGLViewer (const FWTGLViewer &)=delete
const FWTGLViewer &	operator= (const FWTGLViewer &)=delete

Private Attributes
TGLFBO *	m_fbo
int	m_fbo_h
int	m_fbo_w

Detailed Description

Description: [one line class summary]

Usage: <usage>

Definition at line 32 of file FWTGLViewer.h.

Constructor & Destructor Documentation

FWTGLViewer::FWTGLViewer

(

const TGWindow *

parent

)

Definition at line 38 of file FWTGLViewer.cc.

    : TGLEmbeddedViewer(parent, nullptr, nullptr, 0), m_fbo(nullptr), m_fbo_w(-1), m_fbo_h(-1) {}

FWTGLViewer::~FWTGLViewer ( )

override

Definition at line 46 of file FWTGLViewer.cc.

References m_fbo.

{ delete m_fbo; }

FWTGLViewer::FWTGLViewer ( const FWTGLViewer &  )

privatedelete

Member Function Documentation

void FWTGLViewer::DrawHiLod

(

Bool_t

swap_buffers

)

Definition at line 68 of file FWTGLViewer.cc.

                                               {
  fRedrawTimer->Stop();

  // Ignore request if GL window or context not yet availible or shown.
  if ((!fGLWidget && fGLDevice == -1) || (fGLWidget && !fGLWidget->IsMapped())) {
    return;
  }

  // Take scene draw lock - to be revisited
  if (!TakeLock(kDrawLock)) {
    // If taking drawlock fails the previous draw is still in progress
    // set timer to do this one later
    Error("FWTGLViewer::DrawHiLodNoSwap", "viewer locked - skipping this draw.");
    fRedrawTimer->RequestDraw(100, TGLRnrCtx::kLODHigh);
    return;
  }

  fLOD = TGLRnrCtx::kLODHigh;

  DoDraw(swap_buffers);
}

TGLFBO * FWTGLViewer::GenerateFbo	(	Int_t	w,
		Int_t	h,
		Float_t	pixel_object_scale
	)

Definition at line 140 of file FWTGLViewer.cc.

References h, m_fbo, m_fbo_h, m_fbo_w, and w.

Referenced by MakeFbo(), MakeFboHeight(), MakeFboScale(), and MakeFboWidth().

                                                                             {
  // Generate FBO -- function that does the actual work.

  static const TString eh("FWTGLViewer::SavePictureUsingFBO");

  if (!GLEW_EXT_framebuffer_object) {
    ::Warning(eh, "Missing FBO support.");
  }

  if (!TakeLock(kDrawLock)) {
    ::Error(eh, "viewer locked - try later.");
    return nullptr;
  }

  TUnlocker ulck(this);

  MakeCurrent();

  if (m_fbo == nullptr) {
    m_fbo = new TGLFBO();
  }
  if (m_fbo_w != w || m_fbo_h != h) {
    try {
      m_fbo->Init(w, h, fGLWidget->GetPixelFormat()->GetSamples());
    } catch (std::runtime_error& exc) {
      m_fbo_w = m_fbo_h = -1;

      ::Error(eh, "%s", exc.what());
      return nullptr;
    }

    m_fbo_w = w;
    m_fbo_h = h;
  }

  TGLRect old_vp(fViewport);
  SetViewport(0, 0, w, h);

  Float_t old_scale = 1;
  if (pixel_object_scale != 0) {
    old_scale = fRnrCtx->GetRenderScale();
    fRnrCtx->SetRenderScale(old_scale * pixel_object_scale);
  }

  m_fbo->Bind();

  fLOD = TGLRnrCtx::kLODHigh;
  fRnrCtx->SetGrabImage(kTRUE);

  DoDraw(kFALSE);

  fRnrCtx->SetGrabImage(kFALSE);

  m_fbo->Unbind();

  if (pixel_object_scale != 0) {
    fRnrCtx->SetRenderScale(old_scale);
  }

  SetViewport(old_vp);

  return m_fbo;
}

void FWTGLViewer::JustSwap

(

)

Definition at line 90 of file FWTGLViewer.cc.

{ fGLWidget->SwapBuffers(); }

TGLFBO * FWTGLViewer::MakeFbo

(

)

Definition at line 97 of file FWTGLViewer.cc.

References GenerateFbo().

Referenced by FWTEveViewer::CaptureAndSaveImage().

                             {
  // Generate FBO with same dimensions as the viewport.

  return GenerateFbo(fViewport.Width(), fViewport.Height(), kFALSE);
}

TGLFBO * FWTGLViewer::MakeFboHeight	(	Int_t	height,
		Bool_t	pixel_object_scale = kTRUE
	)

Definition at line 116 of file FWTGLViewer.cc.

References GenerateFbo(), Scenarios_cff::scale, and ApeEstimator_cff::width.

Referenced by FWTEveViewer::CaptureAndSaveImage().

                                                                          {
  // Generate FBO with given height (width scaled proportinally).
  // If pixel_object_scale is true (default), the corresponding
  // scaling gets calculated from the current window size.

  Float_t scale = Float_t(height) / fViewport.Height();
  Int_t width = TMath::Nint(scale * fViewport.Width());

  return GenerateFbo(width, height, pixel_object_scale ? scale : 0);
}

TGLFBO * FWTGLViewer::MakeFboScale	(	Float_t	scale,
		Bool_t	pixel_object_scale = kTRUE
	)

Definition at line 128 of file FWTGLViewer.cc.

References GenerateFbo(), h, and w.

                                                                          {
  // Generate FBO with given scale to current window size.
  // If pixel_object_scale is true (default), the same scaling is
  // used.

  Int_t w = TMath::Nint(scale * fViewport.Width());
  Int_t h = TMath::Nint(scale * fViewport.Height());

  return GenerateFbo(w, h, pixel_object_scale ? scale : 0);
}

TGLFBO * FWTGLViewer::MakeFboWidth	(	Int_t	width,
		Bool_t	pixel_object_scale = kTRUE
	)

Definition at line 104 of file FWTGLViewer.cc.

References GenerateFbo(), and Scenarios_cff::scale.

                                                                        {
  // Generate FBO with given width (height scaled proportinally).
  // If pixel_object_scale is true (default), the corresponding
  // scaling gets calculated from the current window size.

  Float_t scale = Float_t(width) / fViewport.Width();
  Int_t height = TMath::Nint(scale * fViewport.Height());

  return GenerateFbo(width, height, pixel_object_scale ? scale : 0);
}

const FWTGLViewer& FWTGLViewer::operator= ( const FWTGLViewer &  )

privatedelete

Member Data Documentation

TGLFBO* FWTGLViewer::m_fbo

private

Definition at line 60 of file FWTGLViewer.h.

Referenced by GenerateFbo(), and ~FWTGLViewer().

int FWTGLViewer::m_fbo_h

private

Definition at line 61 of file FWTGLViewer.h.

Referenced by GenerateFbo().

int FWTGLViewer::m_fbo_w

private

Definition at line 61 of file FWTGLViewer.h.

Referenced by GenerateFbo().