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/*=========================================================================
Program: Visualization Toolkit
Module: vtkFreeTypeLabelRenderStrategy.h
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.
=========================================================================*/
/**
* @class vtkFreeTypeLabelRenderStrategy
* @brief Renders labels with freetype
*
*
* Uses the FreeType to render labels and compute label sizes.
* This strategy may be used with vtkLabelPlacementMapper.
*/
#ifndef vtkFreeTypeLabelRenderStrategy_h
#define vtkFreeTypeLabelRenderStrategy_h
#include "vtkRenderingLabelModule.h" // For export macro
#include "vtkLabelRenderStrategy.h"
class vtkActor2D;
class vtkTextRenderer;
class vtkTextMapper;
class VTKRENDERINGLABEL_EXPORT vtkFreeTypeLabelRenderStrategy : public vtkLabelRenderStrategy
{
public:
void PrintSelf(ostream& os, vtkIndent indent);
vtkTypeMacro(vtkFreeTypeLabelRenderStrategy, vtkLabelRenderStrategy);
static vtkFreeTypeLabelRenderStrategy* New();
/**
* The free type render strategy currently does not support rotation.
*/
virtual bool SupportsRotation()
{ return false; }
/**
* The free type render strategy currently does not support bounded size labels.
*/
virtual bool SupportsBoundedSize()
{ return false; }
/**
* Compute the bounds of a label. Must be performed after the renderer is set.
*/
virtual void ComputeLabelBounds(vtkTextProperty* tprop, vtkStdString label, double bds[4])
{ this->Superclass::ComputeLabelBounds(tprop, label, bds); }
virtual void ComputeLabelBounds(vtkTextProperty* tprop, vtkUnicodeString label, double bds[4]);
/**
* Render a label at a location in world coordinates.
* Must be performed between StartFrame() and EndFrame() calls.
*/
virtual void RenderLabel(int x[2], vtkTextProperty* tprop, vtkStdString label)
{ this->Superclass::RenderLabel(x, tprop, label); }
virtual void RenderLabel(int x[2], vtkTextProperty* tprop, vtkStdString label, int width)
{ this->Superclass::RenderLabel(x, tprop, label, width); }
virtual void RenderLabel(int x[2], vtkTextProperty* tprop, vtkUnicodeString label);
virtual void RenderLabel(int x[2], vtkTextProperty* tprop, vtkUnicodeString label, int width)
{ this->Superclass::RenderLabel(x, tprop, label, width); }
/**
* Release any graphics resources that are being consumed by this strategy.
* The parameter window could be used to determine which graphic
* resources to release.
*/
virtual void ReleaseGraphicsResources(vtkWindow *window);
protected:
vtkFreeTypeLabelRenderStrategy();
~vtkFreeTypeLabelRenderStrategy();
vtkTextRenderer *TextRenderer;
vtkTextMapper* Mapper;
vtkActor2D* Actor;
private:
vtkFreeTypeLabelRenderStrategy(const vtkFreeTypeLabelRenderStrategy&) VTK_DELETE_FUNCTION;
void operator=(const vtkFreeTypeLabelRenderStrategy&) VTK_DELETE_FUNCTION;
};
#endif
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