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/*=========================================================================
Program: Visualization Toolkit
Module: vtkFreeTypeStringToImage.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 vtkFreeTypeStringToImage
* @brief uses Qt to render the supplied text to an image.
*
*
*
*/
#ifndef vtkFreeTypeStringToImage_h
#define vtkFreeTypeStringToImage_h
#include "vtkRenderingFreeTypeModule.h" // For export macro
#include "vtkStringToImage.h"
#include "vtkSmartPointer.h" // For SP ivars
class VTKRENDERINGFREETYPE_EXPORT vtkFreeTypeStringToImage : public vtkStringToImage
{
public:
vtkTypeMacro(vtkFreeTypeStringToImage, vtkStringToImage);
virtual void PrintSelf(ostream &os, vtkIndent indent);
static vtkFreeTypeStringToImage *New();
//@{
/**
* Given a text property and a string, get the bounding box [xmin, xmax] x
* [ymin, ymax]. Note that this is the bounding box of the area
* where actual pixels will be written, given a text/pen/baseline location
* of (0,0).
* For example, if the string starts with a 'space', or depending on the
* orientation, you can end up with a [-20, -10] x [5, 10] bbox (the math
* to get the real bbox is straightforward).
* Return 1 on success, 0 otherwise.
* You can use IsBoundingBoxValid() to test if the computed bbox
* is valid (it may not if GetBoundingBox() failed or if the string
* was empty).
*/
virtual vtkVector2i GetBounds(vtkTextProperty *property,
const vtkUnicodeString& string, int dpi);
virtual vtkVector2i GetBounds(vtkTextProperty *property,
const vtkStdString& string, int dpi);
//@}
//@{
/**
* Given a text property and a string, this function initializes the
* vtkImageData *data and renders it in a vtkImageData. textDims, if provided,
* will be overwritten by the pixel width and height of the rendered string.
* This is useful when ScaleToPowerOfTwo is true, and the image dimensions may
* not match the dimensions of the rendered text.
*/
virtual int RenderString(vtkTextProperty *property,
const vtkUnicodeString& string, int dpi,
vtkImageData *data,
int textDims[2] = NULL);
virtual int RenderString(vtkTextProperty *property,
const vtkStdString& string, int dpi,
vtkImageData *data,
int textDims[2] = NULL);
//@}
/**
* Should we produce images at powers of 2, makes rendering on old OpenGL
* hardware easier. Default is false.
*/
virtual void SetScaleToPowerOfTwo(bool scale);
/**
* Make a deep copy of the supplied utility class.
*/
void DeepCopy(vtkFreeTypeStringToImage *utility);
protected:
vtkFreeTypeStringToImage();
~vtkFreeTypeStringToImage();
class Internals;
Internals* Implementation;
private:
vtkFreeTypeStringToImage(const vtkFreeTypeStringToImage &) VTK_DELETE_FUNCTION;
void operator=(const vtkFreeTypeStringToImage &) VTK_DELETE_FUNCTION;
};
#endif //vtkFreeTypeStringToImage_h
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