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/*=========================================================================
Program: Visualization Toolkit
Module: vtkOpenGLTextActor.cxx
Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
All rights reserved.
See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notice for more information.
=========================================================================*/
#include "vtkOpenGLTextActor.h"
#include "vtkCoordinate.h"
#include "vtkObjectFactory.h"
#include "vtkOpenGLGL2PSHelper.h"
#include "vtkRenderer.h"
#include "vtkRenderWindow.h"
#include "vtkViewport.h"
vtkStandardNewMacro(vtkOpenGLTextActor)
//------------------------------------------------------------------------------
void vtkOpenGLTextActor::PrintSelf(std::ostream &os, vtkIndent indent)
{
this->Superclass::PrintSelf(os, indent);
}
//------------------------------------------------------------------------------
int vtkOpenGLTextActor::RenderOverlay(vtkViewport *viewport)
{
// Render to GL2PS if capturing:
vtkOpenGLGL2PSHelper *gl2ps = vtkOpenGLGL2PSHelper::GetInstance();
if (gl2ps)
{
switch (gl2ps->GetActiveState())
{
case vtkOpenGLGL2PSHelper::Capture:
return this->RenderGL2PS(viewport, gl2ps);
case vtkOpenGLGL2PSHelper::Background:
return 0; // No rendering.
case vtkOpenGLGL2PSHelper::Inactive:
break; // continue rendering.
}
}
return this->Superclass::RenderOverlay(viewport);
}
//------------------------------------------------------------------------------
vtkOpenGLTextActor::vtkOpenGLTextActor()
{
}
//------------------------------------------------------------------------------
vtkOpenGLTextActor::~vtkOpenGLTextActor()
{
}
//------------------------------------------------------------------------------
int vtkOpenGLTextActor::RenderGL2PS(vtkViewport *viewport,
vtkOpenGLGL2PSHelper *gl2ps)
{
std::string input = (this->Input && this->Input[0]) ? this->Input : "";
if (input.empty())
{
return 0;
}
vtkRenderer *ren = vtkRenderer::SafeDownCast(viewport);
if (!ren)
{
vtkWarningMacro("Viewport is not a renderer.");
return 0;
}
// Figure out position:
vtkCoordinate *coord = this->GetActualPositionCoordinate();
double *textPos2 = coord->GetComputedDoubleDisplayValue(ren);
double pos[3];
pos[0] = textPos2[0];
pos[1] = textPos2[1];
pos[2] = -1.;
vtkTextProperty *tprop = this->GetScaledTextProperty();
gl2ps->DrawString(input, tprop, pos, pos[2] + 1e-6, ren);
return 1;
}
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