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209 lines
8.0 KiB
C
209 lines
8.0 KiB
C
3 weeks ago
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/*=========================================================================
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Program: Visualization Toolkit
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Module: vtkPainterDeviceAdapter.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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* Copyright 2004 Sandia Corporation.
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* Under the terms of Contract DE-AC04-94AL85000, there is a non-exclusive
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* license for use of this work by or on behalf of the
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* U.S. Government. Redistribution and use in source and binary forms, with
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* or without modification, are permitted provided that this Notice and any
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* statement of authorship are reproduced on all copies.
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*/
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/**
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* @class vtkPainterDeviceAdapter
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* @brief An adapter between a vtkPainter and a rendering device.
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*
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*
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*
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* This class is an adapter between a vtkPainter and a rendering device (such
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* as an OpenGL machine). Having an abstract adapter allows vtkPainters
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* to be re-used for any rendering system.
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*
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* Although VTK really only uses OpenGL right now, there are reasons to
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* swap out the rendering functions. Sometimes MESA with mangled names
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* is used. Also, different shader extensions use different functions.
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* Furthermore, Cg also has its own interface.
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*
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* The interface for this class should be familier to anyone experienced
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* with OpenGL.
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*
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* @sa
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* vtkPainter
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*
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*/
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#ifndef vtkPainterDeviceAdapter_h
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#define vtkPainterDeviceAdapter_h
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#include "vtkRenderingCoreModule.h" // For export macro
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#include "vtkObject.h"
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#include "vtkDataArray.h" // needed for inline functions.
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class vtkRenderer;
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class VTKRENDERINGCORE_EXPORT vtkPainterDeviceAdapter : public vtkObject
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{
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public:
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static vtkPainterDeviceAdapter* New();
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vtkTypeMacro(vtkPainterDeviceAdapter, vtkObject);
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virtual void PrintSelf(ostream &os, vtkIndent indent);
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/**
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* Signals the start of sending a primitive to the graphics card. The
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* mode is one of VTK_VERTEX, VTK_POLY_VERTEX, VTK_LINE, VTK_POLY_LINE,
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* VTK_TRIANGLE, VTK_TRIANGLE_STRIP, VTK_POLYGON, or VTK_QUAD. The
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* primitive is defined by the attributes sent between the calls to
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* BeginPrimitive and EndPrimitive. You do not need to call
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* EndPrimitive/BeginPrimitive between primitives that have a constant
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* number of points (i.e. VTK_VERTEX, VTK_LINE, VTK_TRIANGLE, and
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* VTK_QUAD).
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*/
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virtual void BeginPrimitive(int mode) = 0;
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/**
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* Signals the end of sending a primitive to the graphics card.
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*/
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virtual void EndPrimitive() = 0;
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/**
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* Returns if the given attribute type is supported by the device.
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* Returns 1 is supported, 0 otherwise.
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*/
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virtual int IsAttributesSupported(int attribute)=0;
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/**
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* Calls glMultiTex
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*/
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virtual void SendMultiTextureCoords(int numcomp, int type, const void *attribute,
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int idx, vtkIdType offset) = 0;
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/**
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* Sends a single attribute to the graphics card. The index parameter
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* identifies the attribute. Some indices have special meaning (see
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* vtkPainter for details). The components parameter gives the number of
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* components in the attribute. In general, components must be between
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* 1-4, but a rendering system may impose even more constraints. The
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* type parameter is a VTK type enumeration (VTK_FLOAT, VTK_INT, etc.).
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* Again, a rendering system may not support all types for all
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* attributes. The attribute parameter is the actual data for the
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* attribute.
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* If offset is specified, it is added to attribute pointer after
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* it has been casted to the proper type.
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*/
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virtual void SendAttribute(int index, int components, int type,
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const void *attribute, vtkIdType offset=0) = 0;
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/**
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* Sets an array of attributes. This allows you to send all the data for
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* a particular attribute with one call, thus greatly reducing function
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* call overhead. Once set, the array is enabled with
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* EnableAttributeArray, and the data is sent with a call to DrawArrays
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* DrawElements.
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*/
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void SetAttributePointer(int index, vtkDataArray *attributeArray);
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/**
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* Sets an array of attributes. This allows you to send all the data for
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* a particular attribute with one call, thus greatly reducing function
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* call overhead. Once set, the array is enabled with
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* EnableAttributeArray, and the data is sent with a call to DrawArrays
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* DrawElements.
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* \arg \c index the index of the attribute.
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* \arg \c numcomponents the number of components in each attribute entry.
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* \arg \c type the data type (VTK_FLOAT, VTK_UNSIGNED_CHAR, etc.).
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* \arg \c stride the byte offset between entries in the array (0 for
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* tightly packed).
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* \arg \c pointer the array holding the data.
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*/
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virtual void SetAttributePointer(int index, int numcomponents, int type,
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int stride, const void *pointer) = 0;
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//@{
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/**
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* Enable/disable the attribute array set with SetAttributePointer.
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*/
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virtual void EnableAttributeArray(int index) = 0;
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virtual void DisableAttributeArray(int index) = 0;
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//@}
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/**
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* Send a section of the enabled attribute pointers to the graphics card
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* to define a primitive. The mode is one of VTK_VERTEX,
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* VTK_POLY_VERTEX, VTK_LINE, VTK_POLY_LINE, VTK_TRIANGLE,
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* VTK_TRIANGLE_STRIP, VTK_POLYGON, or VTK_QUAD. It identifies which
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* type of primitive the attribute data is defining. The parameters
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* first and count identify what part of the attribute arrays define the
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* given primitive. If mode is a primitive that has a constant number of
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* points (i.e. VTK_VERTEX, VTK_LINE, VTK_TRIANGLE, and VTK_QUAD), you
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* may draw multiple primitives with one call to DrawArrays.
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*/
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virtual void DrawArrays(int mode, vtkIdType first, vtkIdType count) = 0;
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/**
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* Send items in the attribute pointers to the graphics card to define a
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* primitive. The mode is one of VTK_VERTEX, VTK_POLY_VERTEX, VTK_LINE,
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* VTK_POLY_LINE, VTK_TRIANGLE, VTK_TRIANGLE_STRIP, VTK_POLYGON, or
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* VTK_QUAD. It identifies which type of primitive the attribute data is
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* defining. The indices array holds the list of attribute elements that
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* define the primitive. The count and type parameters give the number
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* and data type of the indices array. The type parameter is a VTK type
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* enumeration (VTK_UNSIGNED_INT, ...). The type should be an integer
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* type (for obvious reasons). If mode is a primitive that has a
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* constant number of points (i.e. VTK_VERTEX, VTK_LINE, VTK_TRIANGLE,
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* and VTK_QUAD), you may draw multiple primitives with one call to
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* DrawArrays.
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*/
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virtual void DrawElements(int mode, vtkIdType count, int type,
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void *indices) = 0;
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/**
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* Returns true if this device adapter is compatible with the given
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* vtkRenderer.
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*/
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virtual int Compatible(vtkRenderer *renderer) = 0;
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/**
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* Turns emphasis of vertices on or off for vertex selection.
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*/
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virtual void MakeVertexEmphasis(bool mode) = 0;
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//@{
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/**
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* Control use of the stencil buffer (for vertex selection).
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*/
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virtual void Stencil(int on) = 0;
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virtual void WriteStencil(vtkIdType value) = 0;
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virtual void TestStencil(vtkIdType value) = 0;
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//@}
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protected:
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vtkPainterDeviceAdapter();
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~vtkPainterDeviceAdapter();
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private:
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vtkPainterDeviceAdapter(const vtkPainterDeviceAdapter &) VTK_DELETE_FUNCTION;
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void operator=(const vtkPainterDeviceAdapter &) VTK_DELETE_FUNCTION;
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};
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inline void vtkPainterDeviceAdapter::SetAttributePointer(int index,
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vtkDataArray *attributeArray)
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{
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this->SetAttributePointer(index, attributeArray->GetNumberOfComponents(),
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attributeArray->GetDataType(), 0,
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attributeArray->GetVoidPointer(0));
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}
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#endif //_vtkPainterDeviceAdapter_h
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