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/*=========================================================================
Program: Visualization Toolkit
Module: vtkFreeTypeLabelRenderStrategy.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 "vtkFreeTypeLabelRenderStrategy.h"
#include "vtkActor2D.h"
#include "vtkObjectFactory.h"
#include "vtkRenderer.h"
#include "vtkSmartPointer.h"
#include "vtkTextMapper.h"
#include "vtkTextProperty.h"
#include "vtkTextRenderer.h"
#include "vtkTimerLog.h"
#include "vtkWindow.h"
vtkStandardNewMacro(vtkFreeTypeLabelRenderStrategy);
//----------------------------------------------------------------------------
vtkFreeTypeLabelRenderStrategy::vtkFreeTypeLabelRenderStrategy()
{
this->TextRenderer = vtkTextRenderer::GetInstance();
this->Mapper = vtkTextMapper::New();
this->Actor = vtkActor2D::New();
this->Actor->SetMapper(this->Mapper);
}
//----------------------------------------------------------------------------
vtkFreeTypeLabelRenderStrategy::~vtkFreeTypeLabelRenderStrategy()
{
this->Mapper->Delete();
this->Actor->Delete();
}
void vtkFreeTypeLabelRenderStrategy::ReleaseGraphicsResources(vtkWindow *window)
{
this->Actor->ReleaseGraphicsResources(window);
}
//double compute_bounds_time1 = 0;
//int compute_bounds_iter1 = 0;
//----------------------------------------------------------------------------
void vtkFreeTypeLabelRenderStrategy::ComputeLabelBounds(
vtkTextProperty* tprop, vtkUnicodeString label, double bds[4])
{
//vtkTimerLog* timer = vtkTimerLog::New();
//timer->StartTimer();
// Check for empty string.
vtkStdString str;
label.utf8_str(str);
if (str.length() == 0)
{
bds[0] = 0;
bds[1] = 0;
bds[2] = 0;
bds[3] = 0;
return;
}
if (!tprop)
{
tprop = this->DefaultTextProperty;
}
vtkSmartPointer<vtkTextProperty> copy = tprop;
if (tprop->GetOrientation() != 0.0)
{
copy = vtkSmartPointer<vtkTextProperty>::New();
copy->ShallowCopy(tprop);
copy->SetOrientation(0.0);
}
int dpi = 72;
if (this->Renderer && this->Renderer->GetVTKWindow())
{
dpi = this->Renderer->GetVTKWindow()->GetDPI();
}
else
{
vtkWarningMacro(<<"No Renderer set. Assuming DPI of " << dpi << ".");
}
int bbox[4];
this->TextRenderer->GetBoundingBox(copy, label.utf8_str(), bbox, dpi);
// Take line offset into account
bds[0] = bbox[0];
bds[1] = bbox[1];
bds[2] = bbox[2] - tprop->GetLineOffset();
bds[3] = bbox[3] - tprop->GetLineOffset();
// Take justification into account
double sz[2] = {bds[1] - bds[0], bds[3] - bds[2]};
switch (tprop->GetJustification())
{
case VTK_TEXT_LEFT:
break;
case VTK_TEXT_CENTERED:
bds[0] -= sz[0]/2;
bds[1] -= sz[0]/2;
break;
case VTK_TEXT_RIGHT:
bds[0] -= sz[0];
bds[1] -= sz[0];
break;
}
switch (tprop->GetVerticalJustification())
{
case VTK_TEXT_BOTTOM:
break;
case VTK_TEXT_CENTERED:
bds[2] -= sz[1]/2;
bds[3] -= sz[1]/2;
break;
case VTK_TEXT_TOP:
bds[2] -= sz[1];
bds[3] -= sz[1];
break;
}
//timer->StopTimer();
//compute_bounds_time1 += timer->GetElapsedTime();
//compute_bounds_iter1++;
//if (compute_bounds_iter1 % 10000 == 0)
// {
// cerr << "ComputeLabelBounds time: " << (compute_bounds_time1 / compute_bounds_iter1) << endl;
// }
}
//double render_label_time1 = 0;
//int render_label_iter1 = 0;
//----------------------------------------------------------------------------
void vtkFreeTypeLabelRenderStrategy::RenderLabel(
int x[2], vtkTextProperty* tprop, vtkUnicodeString label)
{
//vtkTimerLog* timer = vtkTimerLog::New();
//timer->StartTimer();
if (!this->Renderer)
{
vtkErrorMacro("Renderer must be set before rendering labels.");
return;
}
if (!tprop)
{
tprop = this->DefaultTextProperty;
}
this->Mapper->SetTextProperty(tprop);
this->Mapper->SetInput(label.utf8_str());
this->Actor->GetPositionCoordinate()->SetCoordinateSystemToDisplay();
this->Actor->GetPositionCoordinate()->SetValue(x[0], x[1], 0.0);
this->Mapper->RenderOverlay(this->Renderer, this->Actor);
//timer->StopTimer();
//render_label_time1 += timer->GetElapsedTime();
//render_label_iter1++;
//if (render_label_iter1 % 100 == 0)
// {
// cerr << "RenderLabel time: " << (render_label_time1 / render_label_iter1) << endl;
// }
}
//----------------------------------------------------------------------------
void vtkFreeTypeLabelRenderStrategy::PrintSelf(ostream& os, vtkIndent indent)
{
this->Superclass::PrintSelf(os,indent);
}
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