From Alberto Farre, added support for GL_EXT_blend_color, GL_ARB_multisample,
GL_NV_multisample_filter_hint extension in the form of osg::BlendColor and osg::Multisample state attribute classes.
This commit is contained in:
Robert Osfield
121
include/osg/BlendColor
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121
include/osg/BlendColor
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@@ -0,0 +1,121 @@
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/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2003 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/buffered_value>
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#include <osg/Vec4>
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namespace osg {
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/** BlendColor - encapsulates the OpenGL blend/transparency state.*/
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class SG_EXPORT BlendColor : public StateAttribute
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{
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public :
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BlendColor();
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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 the types are equal and then create the rhs variable
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// used by the COMPARE_StateAttribute_Paramter macro's below.
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COMPARE_StateAttribute_Types(BlendColor,sa)
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// compare each paramter in turn against the rhs.
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COMPARE_StateAttribute_Parameter(_constantColor)
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return 0; // passed all the above comparison macro's, must be equal.
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}
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virtual void getAssociatedModes(std::vector<GLMode>& modes) const
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{
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modes.push_back(GL_BLEND);
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}
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void setConstantColor(osg::Vec4& color) { _constantColor = color; }
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inline osg::Vec4 getConstantColor() const { return _constantColor; }
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virtual void apply(State& state) const;
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/** Extensions class which encapsulates the querring of extensions and
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* associated function pointers, and provide convinience wrappers to
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* check for the extensions or use the associated functions.*/
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class SG_EXPORT Extensions : public osg::Referenced
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{
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public:
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Extensions();
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Extensions(const Extensions& rhs);
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void lowestCommonDenominator(const Extensions& rhs);
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void setupGLExtenions();
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void setBlendColorSupported(bool flag) { _isBlendColorSupported=flag; }
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bool isBlendColorSupported() const { return _isBlendColorSupported; }
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void setBlendColorProc(void* ptr) { _glBlendColor = ptr; }
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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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bool _isBlendColorSupported;
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void* _glBlendColor;
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};
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/** Function to call to get the extension of a specified context.
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* If the Exentsion object for that context has not yet been created then
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* and the 'createIfNotInitalized' flag been set to false then returns NULL.
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* If 'createIfNotInitalized' is true then the Extensions object is
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* automatically created. However, in this case the extension object
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* only be created with the graphics context associated with ContextID..*/
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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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@@ -16,6 +16,17 @@
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#include <osg/StateAttribute>
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#ifndef GL_VERSION_1_2
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#define GL_CONSTANT_COLOR 0x8001
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#define GL_ONE_MINUS_CONSTANT_COLOR 0x8002
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#define GL_CONSTANT_ALPHA 0x8003
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#define GL_ONE_MINUS_CONSTANT_ALPHA 0x8004
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#define GL_BLEND_COLOR 0x8005
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#endif
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namespace osg {
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/** BlendFunc - encapsulates the OpenGL blend/transparency state.*/
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@@ -55,17 +66,19 @@ class SG_EXPORT BlendFunc : public StateAttribute
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}
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enum BlendFuncMode {
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DST_ALPHA = GL_DST_ALPHA,
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DST_COLOR = GL_DST_COLOR,
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ONE = GL_ONE,
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ONE_MINUS_DST_ALPHA = GL_ONE_MINUS_DST_ALPHA,
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ONE_MINUS_DST_COLOR = GL_ONE_MINUS_DST_COLOR,
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ONE_MINUS_SRC_ALPHA = GL_ONE_MINUS_SRC_ALPHA,
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ONE_MINUS_SRC_COLOR = GL_ONE_MINUS_SRC_COLOR,
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SRC_ALPHA = GL_SRC_ALPHA,
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SRC_ALPHA_SATURATE = GL_SRC_ALPHA_SATURATE,
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SRC_COLOR = GL_SRC_COLOR,
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ZERO = GL_ZERO
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DST_ALPHA = GL_DST_ALPHA,
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DST_COLOR = GL_DST_COLOR,
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ONE = GL_ONE,
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ONE_MINUS_DST_ALPHA = GL_ONE_MINUS_DST_ALPHA,
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ONE_MINUS_DST_COLOR = GL_ONE_MINUS_DST_COLOR,
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ONE_MINUS_SRC_ALPHA = GL_ONE_MINUS_SRC_ALPHA,
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ONE_MINUS_SRC_COLOR = GL_ONE_MINUS_SRC_COLOR,
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SRC_ALPHA = GL_SRC_ALPHA,
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SRC_ALPHA_SATURATE = GL_SRC_ALPHA_SATURATE,
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SRC_COLOR = GL_SRC_COLOR,
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CONSTANT_ALPHA = GL_CONSTANT_ALPHA,
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ONE_MINUS_CONSTANT_ALPHA = GL_ONE_MINUS_CONSTANT_ALPHA,
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ZERO = GL_ZERO
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};
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inline void setFunction( GLenum source, GLenum destination )
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156
include/osg/Multisample
Normal file
156
include/osg/Multisample
Normal file
@@ -0,0 +1,156 @@
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/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2003 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_MULTISAMPLE
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#define OSG_MULTISAMPLE 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/buffered_value>
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#ifndef GL_ARB_multisample
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#define GL_MULTISAMPLE_ARB 0x809D
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#define GL_SAMPLE_ALPHA_TO_COVERAGE_ARB 0x809E
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#define GL_SAMPLE_ALPHA_TO_ONE_ARB 0x809F
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#define GL_SAMPLE_COVERAGE_ARB 0x80A0
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#define GL_SAMPLE_BUFFERS_ARB 0x80A8
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#define GL_SAMPLES_ARB 0x80A9
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#define GL_SAMPLE_COVERAGE_VALUE_ARB 0x80AA
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#define GL_SAMPLE_COVERAGE_INVERT_ARB 0x80AB
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#define GL_MULTISAMPLE_BIT_ARB 0x20000000
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#endif
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#ifndef GL_NV_multisample_filter_hint
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#define GL_MULTISAMPLE_FILTER_HINT_NV 0x8534
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#endif
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namespace osg {
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/** Multisample - encapsulates the OpenGL Multisample state.*/
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class SG_EXPORT Multisample : public StateAttribute
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{
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public :
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enum Mode
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{
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FASTEST = GL_FASTEST,
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NICEST = GL_NICEST,
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DONT_CARE = GL_DONT_CARE
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};
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Multisample();
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/** Copy constructor using CopyOp to manage deep vs shallow copy.*/
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Multisample(const Multisample& trans,const CopyOp& copyop=CopyOp::SHALLOW_COPY):
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StateAttribute(trans,copyop),
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_coverage(trans._coverage),
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_invert(trans._invert),
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_mode(trans._mode) {}
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META_StateAttribute(osg, Multisample,MULTISAMPLE);
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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_Paramter macro's below.
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COMPARE_StateAttribute_Types(Multisample,sa)
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// compare each paramter in turn against the rhs.
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COMPARE_StateAttribute_Parameter(_coverage)
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COMPARE_StateAttribute_Parameter(_invert)
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COMPARE_StateAttribute_Parameter(_mode)
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return 0; // passed all the above comparison macro's, must be equal.
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}
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virtual void getAssociatedModes(std::vector<GLMode>& modes) const {}
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void setSampleCoverage(float coverage, bool invert)
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{
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_coverage = coverage;
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_invert = invert;
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}
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inline float getCoverage() const { return _coverage; }
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inline bool getInvert() const { return _invert; }
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inline void setHint(Mode mode) { _mode = mode; }
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virtual void apply(State& state) const;
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/** Extensions class which encapsulates the querring of extensions and
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* associated function pointers, and provide convinience wrappers to
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* check for the extensions or use the associated functions.*/
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class SG_EXPORT Extensions : public osg::Referenced
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{
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public:
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Extensions();
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Extensions(const Extensions& rhs);
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void lowestCommonDenominator(const Extensions& rhs);
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void setupGLExtenions();
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void setMultisampleSupported(bool flag) { _isMultisampleSupported=flag; }
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void setMultisampleFilterHintSupported(bool flag) { _isMultisampleFilterHintSupported=flag; }
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bool isMultisampleSupported() const { return _isMultisampleSupported; }
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bool isMultisampleFilterHintSupported() const { return _isMultisampleFilterHintSupported; }
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void setSampleCoverageProc(void* ptr) { _glSampleCoverage = ptr; }
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void glSampleCoverage(GLclampf value, GLboolean invert) const;
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protected:
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~Extensions() {}
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bool _isMultisampleSupported;
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bool _isMultisampleFilterHintSupported;
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void* _glSampleCoverage;
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};
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/** Function to call to get the extension of a specified context.
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* If the Exentsion object for that context has not yet been created then
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* and the 'createIfNotInitalized' flag been set to false then returns NULL.
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* If 'createIfNotInitalized' is true then the Extensions object is
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* automatically created. However, in this case the extension object
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* only be created with the graphics context associated with ContextID..*/
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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 ~Multisample();
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float _coverage;
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bool _invert;
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Mode _mode;
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};
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}
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#endif
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@@ -79,7 +79,7 @@ class SG_EXPORT StateAttribute : public Object
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/** Override is used to specified the override behavior of StateAttributes
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* from from parent to children.
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* See enum Value description for more details.*/
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typedef unsigned int OverrideValue;
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typedef unsigned int OverrideValue;
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/** list values which can be used in to set either GLModeValues
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* or OverrideValues. When using in conjunction with GLModeValues
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@@ -151,6 +151,9 @@ class SG_EXPORT StateAttribute : public Object
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COLORMASK,
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DEPTH,
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VIEWPORT,
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BLENDCOLOR,
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MULTISAMPLE,
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CLIPPLANE,
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CLIPPLANE_0 =CLIPPLANE,
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