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93 lines
3.3 KiB
C
93 lines
3.3 KiB
C
3 weeks ago
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/*=========================================================================
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Program: Visualization Toolkit
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Module: vtkTextRendererStringToImage.h
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Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
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All rights reserved.
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See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
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This software is distributed WITHOUT ANY WARRANTY; without even
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the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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PURPOSE. See the above copyright notice for more information.
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=========================================================================*/
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/**
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* @class vtkTextRendererStringToImage
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* @brief uses vtkTextRenderer to render the
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* supplied text to an image.
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*/
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#ifndef vtkTextRendererStringToImage_h
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#define vtkTextRendererStringToImage_h
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#include "vtkRenderingFreeTypeModule.h" // For export macro
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#include "vtkStringToImage.h"
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class VTKRENDERINGFREETYPE_EXPORT vtkTextRendererStringToImage : public vtkStringToImage
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{
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public:
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vtkTypeMacro(vtkTextRendererStringToImage, vtkStringToImage);
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void PrintSelf(ostream& os, vtkIndent indent) override;
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static vtkTextRendererStringToImage* New();
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//@{
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/**
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* Given a text property and a string, get the bounding box [xmin, xmax] x
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* [ymin, ymax]. Note that this is the bounding box of the area
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* where actual pixels will be written, given a text/pen/baseline location
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* of (0,0).
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* For example, if the string starts with a 'space', or depending on the
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* orientation, you can end up with a [-20, -10] x [5, 10] bbox (the math
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* to get the real bbox is straightforward).
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* Return 1 on success, 0 otherwise.
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* You can use IsBoundingBoxValid() to test if the computed bbox
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* is valid (it may not if GetBoundingBox() failed or if the string
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* was empty).
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*/
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vtkVector2i GetBounds(
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vtkTextProperty* property, const vtkUnicodeString& string, int dpi) override;
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vtkVector2i GetBounds(vtkTextProperty* property, const vtkStdString& string, int dpi) override;
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//@}
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//@{
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/**
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* Given a text property and a string, this function initializes the
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* vtkImageData *data and renders it in a vtkImageData. textDims, if provided,
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* will be overwritten by the pixel width and height of the rendered string.
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* This is useful when ScaleToPowerOfTwo is true, and the image dimensions may
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* not match the dimensions of the rendered text.
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*/
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int RenderString(vtkTextProperty* property, const vtkUnicodeString& string, int dpi,
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vtkImageData* data, int textDims[2] = nullptr) override;
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int RenderString(vtkTextProperty* property, const vtkStdString& string, int dpi,
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vtkImageData* data, int textDims[2] = nullptr) override;
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//@}
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/**
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* Should we produce images at powers of 2, makes rendering on old OpenGL
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* hardware easier. Default is false.
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*/
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void SetScaleToPowerOfTwo(bool scale) override;
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/**
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* Make a deep copy of the supplied utility class.
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*/
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void DeepCopy(vtkTextRendererStringToImage* utility);
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protected:
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vtkTextRendererStringToImage();
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~vtkTextRendererStringToImage() override;
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class Internals;
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Internals* Implementation;
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private:
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vtkTextRendererStringToImage(const vtkTextRendererStringToImage&) = delete;
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void operator=(const vtkTextRendererStringToImage&) = delete;
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};
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#endif // vtkTextRendererStringToImage_h
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