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