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111 lines
3.1 KiB
111 lines
3.1 KiB
/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2006 Robert Osfield
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*
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* This library is open source and may be redistributed and/or modified under
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* the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
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* (at your option) any later version. The full license is in LICENSE file
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* included with this distribution, and on the openscenegraph.org website.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* OpenSceneGraph Public License for more details.
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*/
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#ifndef OSG_Scissor
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#define OSG_Scissor 1
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#include <osg/StateAttribute>
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namespace osg {
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/** Encapsulate OpenGL glScissor. */
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class OSG_EXPORT Scissor : public StateAttribute
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{
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public :
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Scissor();
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Scissor(int x,int y,int width,int height):
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_x(x),
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_y(y),
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_width(width),
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_height(height) {}
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/** Copy constructor using CopyOp to manage deep vs shallow copy. */
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Scissor(const Scissor& vp,const CopyOp& copyop=CopyOp::SHALLOW_COPY):
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StateAttribute(vp,copyop),
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_x(vp._x),
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_y(vp._y),
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_width(vp._width),
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_height(vp._height) {}
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META_StateAttribute(osg, Scissor, SCISSOR);
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/** Return -1 if *this < *rhs, 0 if *this==*rhs, 1 if *this>*rhs. */
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virtual int compare(const StateAttribute& sa) const
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{
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// check the types are equal and then create the rhs variable
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// used by the COMPARE_StateAttribute_Parameter macros below.
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COMPARE_StateAttribute_Types(Scissor,sa)
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// compare each parameter in turn against the rhs.
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COMPARE_StateAttribute_Parameter(_x)
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COMPARE_StateAttribute_Parameter(_y)
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COMPARE_StateAttribute_Parameter(_width)
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COMPARE_StateAttribute_Parameter(_height)
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return 0; // passed all the above comparison macros, must be equal.
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}
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virtual bool getModeUsage(StateAttribute::ModeUsage& usage) const
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{
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usage.usesMode(GL_SCISSOR_TEST);
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return true;
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}
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inline void setScissor(int x,int y,int width,int height)
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{
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_x = x;
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_y = y;
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_width = width;
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_height = height;
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}
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void getScissor(int& x,int& y,int& width,int& height) const
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{
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x = _x;
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y = _y;
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width = _width;
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height = _height;
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}
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inline int& x() { return _x; }
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inline int x() const { return _x; }
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inline int& y() { return _y; }
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inline int y() const { return _y; }
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inline int& width() { return _width; }
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inline int width() const { return _width; }
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inline int& height() { return _height; }
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inline int height() const { return _height; }
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virtual void apply(State& state) const;
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protected:
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virtual ~Scissor();
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int _x;
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int _y;
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int _width;
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int _height;
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};
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}
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#endif
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