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/*=========================================================================
Program: Visualization Toolkit
Module: vtkTextActor3D.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.
=========================================================================*/
// .NAME vtkTextActor3D - An actor that displays text.
// .SECTION Description
// The input text is rendered into a buffer, which in turn is used as a
// texture applied onto a quad (a vtkImageActor is used under the hood).
// .SECTION Warning
// This class is experimental at the moment.
// - The orientation is not optimized, the quad should be oriented, not
// the text itself when it is rendered in the buffer (we end up with
// excessively big textures for 45 degrees angles).
// This will be fixed first.
// - No checking is done at the moment regarding hardware texture size limits.
//
// .SECTION See Also
// vtkProp3D
#ifndef vtkTextActor3D_h
#define vtkTextActor3D_h
#include "vtkRenderingCoreModule.h" // For export macro
#include "vtkProp3D.h"
class vtkImageActor;
class vtkImageData;
class vtkTextProperty;
class VTKRENDERINGCORE_EXPORT vtkTextActor3D : public vtkProp3D
{
public:
static vtkTextActor3D *New();
vtkTypeMacro(vtkTextActor3D,vtkProp3D);
void PrintSelf(ostream& os, vtkIndent indent);
// Description:
// Set the text string to be displayed.
vtkSetStringMacro(Input);
vtkGetStringMacro(Input);
// Description:
// Set/Get the text property.
virtual void SetTextProperty(vtkTextProperty *p);
vtkGetObjectMacro(TextProperty,vtkTextProperty);
// Description:
// Since a 3D text actor is not pixel-aligned and positioned in 3D space,
// the text is rendered at a constant DPI, rather than using the current
// window DPI. This static method returns the DPI value used to produce the
// text images.
static int GetRenderedDPI() { return 72; }
// Description:
// Shallow copy of this text actor. Overloads the virtual
// vtkProp method.
void ShallowCopy(vtkProp *prop);
// Description:
// Get the bounds for this Prop3D as (Xmin,Xmax,Ymin,Ymax,Zmin,Zmax).
virtual double *GetBounds();
void GetBounds(double bounds[6]) {this->vtkProp3D::GetBounds( bounds );}
// Description:
// Get the vtkTextRenderer-derived bounding box for the given vtkTextProperty
// and text string str. Results are returned in the four element bbox int
// array. This call can be used for sizing other elements.
int GetBoundingBox(int bbox[4]);
//BTX
// Description:
// WARNING: INTERNAL METHOD - NOT INTENDED FOR GENERAL USE
// DO NOT USE THIS METHOD OUTSIDE OF THE RENDERING PROCESS.
// Release any graphics resources that are being consumed by this actor.
// The parameter window could be used to determine which graphic
// resources to release.
virtual void ReleaseGraphicsResources(vtkWindow *);
// Description:
// WARNING: INTERNAL METHOD - NOT INTENDED FOR GENERAL USE
// DO NOT USE THIS METHOD OUTSIDE OF THE RENDERING PROCESS.
// Draw the text actor to the screen.
int RenderOpaqueGeometry(vtkViewport* viewport);
virtual int RenderTranslucentPolygonalGeometry(vtkViewport* viewport);
int RenderOverlay(vtkViewport* viewport);
// Description:
// Does this prop have some translucent polygonal geometry?
virtual int HasTranslucentPolygonalGeometry();
//ETX
protected:
vtkTextActor3D();
~vtkTextActor3D();
char *Input;
vtkImageActor *ImageActor;
vtkImageData *ImageData;
vtkTextProperty *TextProperty;
vtkTimeStamp BuildTime;
virtual int UpdateImageActor();
private:
vtkTextActor3D(const vtkTextActor3D&); // Not implemented.
void operator=(const vtkTextActor3D&); // Not implemented.
};
#endif
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