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/*=========================================================================
Program: Visualization Toolkit
Module: vtkQtLabelRenderStrategy.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 vtkQtLabelRenderStrategy
* @brief Renders labels with Qt
*
*
* This class uses Qt to render labels and compute sizes. The labels are
* rendered to a QImage, then EndFrame() converts that image to a vtkImageData
* and textures the image onto a quad spanning the render area.
*/
#ifndef vtkQtLabelRenderStrategy_h
#define vtkQtLabelRenderStrategy_h
#include "vtkLabelRenderStrategy.h"
#include "vtkRenderingQtModule.h" // For export macro
VTK_ABI_NAMESPACE_BEGIN
class vtkLabelSizeCalculator;
class vtkLabeledDataMapper;
class vtkPlaneSource;
class vtkPolyDataMapper2D;
class vtkQImageToImageSource;
class vtkTexture;
class vtkTexturedActor2D;
class vtkTextureMapToPlane;
class VTKRENDERINGQT_EXPORT vtkQtLabelRenderStrategy : public vtkLabelRenderStrategy
{
public:
void PrintSelf(ostream& os, vtkIndent indent) override;
vtkTypeMacro(vtkQtLabelRenderStrategy, vtkLabelRenderStrategy);
static vtkQtLabelRenderStrategy* New();
/**
* 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;
void RenderLabel(int x[2], vtkTextProperty* tprop, vtkStdString label, int maxWidth) override;
///@}
/**
* Start a rendering frame. Renderer must be set.
*/
void StartFrame() override;
/**
* End a rendering frame.
*/
void EndFrame() 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:
vtkQtLabelRenderStrategy();
~vtkQtLabelRenderStrategy() override;
class Internals;
Internals* Implementation;
vtkQImageToImageSource* QImageToImage;
vtkPlaneSource* PlaneSource;
vtkTextureMapToPlane* TextureMapToPlane;
vtkTexture* Texture;
vtkPolyDataMapper2D* Mapper;
vtkTexturedActor2D* Actor;
bool AntialiasText; // Should the text be antialiased, inherited from render window.
private:
vtkQtLabelRenderStrategy(const vtkQtLabelRenderStrategy&) = delete;
void operator=(const vtkQtLabelRenderStrategy&) = delete;
};
VTK_ABI_NAMESPACE_END
#endif
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