409cdd0b28
local function pointer to avoid compiler warnings related to case void*. Moved various OSG classes across to using setGLExtensions instead of getGLExtensions, and changed them to use typedef declarations in the headers rather than casts in the .cpp. Updated wrappers
126 lines
4.3 KiB
C++
126 lines
4.3 KiB
C++
/* -*-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_BLENDCOLOR
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#define OSG_BLENDCOLOR 1
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#include <osg/GL>
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#include <osg/StateAttribute>
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#include <osg/ref_ptr>
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#include <osg/Vec4>
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namespace osg {
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/** Encapsulates OpenGL blend/transparency state. */
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class OSG_EXPORT BlendColor : public StateAttribute
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{
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public :
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BlendColor();
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BlendColor(const osg::Vec4& constantColor);
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/** Copy constructor using CopyOp to manage deep vs shallow copy.*/
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BlendColor(const BlendColor& trans,const CopyOp& copyop=CopyOp::SHALLOW_COPY):
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StateAttribute(trans,copyop),
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_constantColor(trans._constantColor) {}
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META_StateAttribute(osg, BlendColor,BLENDCOLOR);
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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 for equal types, then create the rhs variable
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// used by the COMPARE_StateAttribute_Paramter macros below.
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COMPARE_StateAttribute_Types(BlendColor,sa)
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// Compare each parameter in turn against the rhs.
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COMPARE_StateAttribute_Parameter(_constantColor)
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return 0; // Passed all the above comparison macros, so 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_BLEND);
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return true;
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}
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void setConstantColor(const osg::Vec4& color) { _constantColor = color; }
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inline osg::Vec4& getConstantColor() { return _constantColor; }
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inline const osg::Vec4& getConstantColor() const { return _constantColor; }
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virtual void apply(State& state) const;
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/** Encapsulates queries of extension availability, obtains extension
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* function pointers, and provides convinience wrappers for
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* calling extension functions. */
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class OSG_EXPORT Extensions : public osg::Referenced
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{
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public:
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Extensions(unsigned int contextID);
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Extensions(const Extensions& rhs);
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void lowestCommonDenominator(const Extensions& rhs);
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void setupGLExtensions(unsigned int contextID);
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void setBlendColorSupported(bool flag) { _isBlendColorSupported=flag; }
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bool isBlendColorSupported() const { return _isBlendColorSupported; }
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void glBlendColor(GLclampf red , GLclampf green , GLclampf blue , GLclampf alpha) const;
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protected:
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~Extensions() {}
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typedef void (APIENTRY * GLBlendColorProc) (GLclampf red, GLclampf green, GLclampf blue, GLclampf alpha);
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bool _isBlendColorSupported;
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GLBlendColorProc _glBlendColor;
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};
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/** Returns the Extensions object for the given context.
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* If createIfNotInitalized is true and the Exentsions object doesn't
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* exist, getExtensions() creates it on the given context.
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* Returns NULL if createIfNotInitalized is false and the Extensions
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* object doesn't exist. */
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static Extensions* getExtensions(unsigned int contextID,bool createIfNotInitalized);
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/** setExtensions() allows users to override the extensions across graphics contexts.
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* Typically used when you have different extensions supported across graphics pipes,
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* but need to ensure that they all use the same low common denominator extensions. */
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static void setExtensions(unsigned int contextID,Extensions* extensions);
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protected :
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virtual ~BlendColor();
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osg::Vec4 _constantColor;
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};
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}
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#endif
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