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100 lines
3.3 KiB
C
100 lines
3.3 KiB
C
3 weeks ago
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/*=========================================================================
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Program: Visualization Toolkit
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Module: vtkOpenGL2ContextDevice2D.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 vtkOpenGL2ContextDevice2D
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* @brief Class for drawing 2D primitives using
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* OpenGL 2.
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*
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*
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* This class takes care of drawing the 2D primitives for the vtkContext2D class.
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* In general this class should not be used directly, but called by vtkContext2D
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* which takes care of many of the higher level details.
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*
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* It assumes that OpenGL 2 is available, which is taken care of by the
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* vtkContextActor class. If OpenGL 2 is not available, but OpenGL rendering is
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* required the vtkOpenGLContextDevice2D class should be used (employs GL 1.1).
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*
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* @sa
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* vtkOpenGLContextDevice2D
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*/
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#ifndef vtkOpenGL2ContextDevice2D_h
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#define vtkOpenGL2ContextDevice2D_h
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#include "vtkOpenGLContextDevice2D.h"
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class VTKRENDERINGCONTEXTOPENGL_EXPORT vtkOpenGL2ContextDevice2D :
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public vtkOpenGLContextDevice2D
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{
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public:
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vtkTypeMacro(vtkOpenGL2ContextDevice2D, vtkOpenGLContextDevice2D);
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virtual void PrintSelf(ostream &os, vtkIndent indent);
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/**
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* Creates a 2D Painter object.
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*/
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static vtkOpenGL2ContextDevice2D *New();
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/**
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* Return true if the current rendering context supports this device.
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*/
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static bool IsSupported(vtkViewport *viewport);
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/**
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* Draw a series of point sprites, images centred at the points supplied.
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* The supplied vtkImageData is the sprite to be drawn, only squares will be
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* drawn and the size is set using SetPointSize. Points are colored by colors array
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* which has nc_comps components
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*/
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virtual void DrawPointSprites(vtkImageData *sprite, float *points, int n,
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unsigned char* colors = 0, int nc_comps = 0);
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/**
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* Draw the supplied image at the given x, y (p[0], p[1]) (bottom corner),
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* scaled by scale (1.0 would match the image).
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*/
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virtual void DrawImage(float p[2], float scale, vtkImageData *image);
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/**
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* Draw the supplied image at the given position. The origin, width, and
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* height are specified by the supplied vtkRectf variable pos. The image
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* will be drawn scaled to that size.
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*/
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void DrawImage(const vtkRectf& pos, vtkImageData *image);
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/**
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* Release any graphics resources that are being consumed by this device.
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* The parameter window could be used to determine which graphic
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* resources to release.
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*/
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virtual void ReleaseGraphicsResources(vtkWindow *window);
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protected:
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vtkOpenGL2ContextDevice2D();
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virtual ~vtkOpenGL2ContextDevice2D();
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/**
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* Load the OpenGL extensions we need.
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*/
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virtual bool LoadExtensions(vtkOpenGLExtensionManager *m);
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private:
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vtkOpenGL2ContextDevice2D(const vtkOpenGL2ContextDevice2D &) VTK_DELETE_FUNCTION;
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void operator=(const vtkOpenGL2ContextDevice2D &) VTK_DELETE_FUNCTION;
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};
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#endif //vtkOpenGL2ContextDevice2D_h
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