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
135 lines
5.2 KiB
C++
135 lines
5.2 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_CLAMPCOLOR
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#define OSG_CLAMPCOLOR 1
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#include <osg/StateAttribute>
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#ifndef GL_ARB_color_buffer_float
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#define GL_RGBA_FLOAT_MODE_ARB 0x8820
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#define GL_CLAMP_VERTEX_COLOR_ARB 0x891A
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#define GL_CLAMP_FRAGMENT_COLOR_ARB 0x891B
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#define GL_CLAMP_READ_COLOR_ARB 0x891C
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#define GL_FIXED_ONLY_ARB 0x891D
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#endif
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#ifndef GL_FIXED_ONLY
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#define GL_FIXED_ONLY GL_FIXED_ONLY_ARB
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#define GL_CLAMP_VERTEX_COLOR GL_CLAMP_VERTEX_COLOR_ARB
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#define GL_CLAMP_READ_COLOR GL_CLAMP_READ_COLOR_ARB
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#define GL_CLAMP_FRAGMENT_COLOR GL_CLAMP_FRAGMENT_COLOR_ARB
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#endif
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namespace osg {
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/** Encapsulates OpenGL ClampColor state. */
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class OSG_EXPORT ClampColor : public StateAttribute
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{
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public :
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ClampColor();
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ClampColor(GLenum vertexMode, GLenum fragmentMode, GLenum readMode);
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/** Copy constructor using CopyOp to manage deep vs shallow copy. */
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ClampColor(const ClampColor& rhs,const CopyOp& copyop=CopyOp::SHALLOW_COPY):
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StateAttribute(rhs,copyop),
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_clampVertexColor(rhs._clampVertexColor),
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_clampFragmentColor(rhs._clampFragmentColor),
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_clampReadColor(rhs._clampReadColor) {}
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META_StateAttribute(osg, ClampColor,CLAMPCOLOR);
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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(ClampColor,sa)
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// Compare each parameter in turn against the rhs.
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COMPARE_StateAttribute_Parameter(_clampVertexColor)
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COMPARE_StateAttribute_Parameter(_clampFragmentColor)
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COMPARE_StateAttribute_Parameter(_clampReadColor)
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return 0; // Passed all the above comparison macros, so must be equal.
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}
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void setClampVertexColor(GLenum mode) { _clampVertexColor = mode; }
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GLenum getClampVertexColor() const { return _clampVertexColor; }
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void setClampFragmentColor(GLenum mode) { _clampFragmentColor = mode; }
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GLenum getClampFragmentColor() const { return _clampFragmentColor; }
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void setClampReadColor(GLenum mode) { _clampReadColor = mode; }
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GLenum getClampReadColor() const { return _clampReadColor; }
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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 setClampColorSupported(bool flag) { _isClampColorSupported=flag; }
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bool isClampColorSupported() const { return _isClampColorSupported; }
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void glClampColor(GLenum target, GLenum mode) const;
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protected:
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~Extensions() {}
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typedef void (APIENTRY * GLClampColorProc) (GLenum target, GLenum mode);
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bool _isClampColorSupported;
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GLClampColorProc _glClampColor;
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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 ~ClampColor();
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GLenum _clampVertexColor;
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GLenum _clampFragmentColor;
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GLenum _clampReadColor;
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};
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}
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#endif
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