FGFS-4.1/OpenSceneGraph
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Changed the support for anisotropic filtering in osg::Texture so that it

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is now controlled via the setMaxAnisotropy(float) method, and is set up
independently for the mag filter mode, which it previously was done.
This commit is contained in:
Robert Osfield 2002-08-07 15:52:24 +00:00
parent 0bee7dd3d9
commit b9b013e15b
7 changed files with 69 additions and 50 deletions
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11
include/osg/Texture
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@ -165,7 +165,6 @@ class SG_EXPORT Texture : public StateAttribute
NEAREST = GL_NEAREST,
NEAREST_MIPMAP_LINEAR = GL_NEAREST_MIPMAP_LINEAR,
NEAREST_MIPMAP_NEAREST = GL_NEAREST_MIPMAP_NEAREST,
ANISOTROPIC = GL_TEXTURE_MAX_ANISOTROPY_EXT
};
@ -175,6 +174,15 @@ class SG_EXPORT Texture : public StateAttribute
/** Get the texture filter mode.*/
const FilterMode getFilter(const FilterParameter which) const;
/** Set the maximum anisotropy value, default value is 1.0 for
* no anisotropic filtering. If hardware does not support anisotropic
* filtering then normal filtering is used, equivilant to a max anisotropy value of 1.0.
* valid range is 1.0f upwards. The maximum value depends on the graphics
* system being used.*/
inline void setMaxAnisotropy(float anis);
/** Get the maximum anisotropy value.*/
inline float getMaxAnisotropy() const { return _maxAnisotropy; }
enum InternalFormatMode {
USE_IMAGE_DATA_FORMAT,
@ -363,6 +371,7 @@ class SG_EXPORT Texture : public StateAttribute
FilterMode _min_filter;
FilterMode _mag_filter;
float _maxAnisotropy;
// true if apply tex parameters required.
mutable bool _texParamtersDirty;

4
src/Demos/osgbillboard/osgbillboard.cpp
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@ -180,7 +180,9 @@ osg::Node* createLayer(const osg::Vec3& offset,osg::Image* image,osg::Node* geom
// set up anistropic filtering.
texture->setFilter(osg::Texture::MIN_FILTER,osg::Texture::LINEAR_MIPMAP_LINEAR);
texture->setFilter(osg::Texture::MAG_FILTER,osg::Texture::ANISOTROPIC);
texture->setFilter(osg::Texture::MAG_FILTER,osg::Texture::LINEAR);
texture->setMaxAnisotropy(2.0f);
// add the transform node to root group node.
top_transform->addChild(createTexturedItem(local_offset,texture,geometry));

4
src/Demos/osgtexture/osgtexture.cpp
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@ -35,7 +35,6 @@ class TextureCallback : public osg::NodeCallback
_filterRange.push_back(osg::Texture::NEAREST);
_filterRange.push_back(osg::Texture::NEAREST_MIPMAP_LINEAR);
_filterRange.push_back(osg::Texture::NEAREST_MIPMAP_NEAREST);
_filterRange.push_back(osg::Texture::ANISOTROPIC);
_currPos = 0;
_prevTime = 0.0;
}
@ -240,7 +239,8 @@ osg::Node* createLayer(const osg::Vec3& offset,osg::Image* image,osg::Node* geom
// set up anistropic filtering.
texture->setFilter(osg::Texture::MIN_FILTER,osg::Texture::LINEAR_MIPMAP_LINEAR);
texture->setFilter(osg::Texture::MAG_FILTER,osg::Texture::ANISOTROPIC);
texture->setFilter(osg::Texture::MAG_FILTER,osg::Texture::LINEAR);
texture->setMaxAnisotropy(2.0f);
// add the transform node to root group node.
top_transform->addChild(createTexturedItem(local_offset,texture,geometry));

38
src/osg/Texture.cpp
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@ -26,6 +26,7 @@ Texture::Texture():
_wrap_r(CLAMP),
_min_filter(LINEAR_MIPMAP_LINEAR), // trilinear
_mag_filter(LINEAR),
_maxAnisotropy(1.0f),
_texParamtersDirty(true),
_internalFormatMode(USE_IMAGE_DATA_FORMAT),
_internalFormatValue(0),
@ -57,6 +58,7 @@ Texture::Texture(const Texture& text,const CopyOp& copyop):
_wrap_r(text._wrap_r),
_min_filter(text._min_filter),
_mag_filter(text._mag_filter),
_maxAnisotropy(text._maxAnisotropy),
_texParamtersDirty(false),
_internalFormatMode(text._internalFormatMode),
_internalFormatValue(text._internalFormatValue),
@ -191,6 +193,15 @@ const Texture::FilterMode Texture::getFilter(const FilterParameter which) const
}
}
void Texture::setMaxAnisotropy(float anis)
{
if (_maxAnisotropy!=anis)
{
_maxAnisotropy = anis;
_texParamtersDirty = true;
}
}
/** Force a recompile on next apply() of associated OpenGL texture objects.*/
void Texture::dirtyTextureObject()
{
@ -207,11 +218,6 @@ void Texture::dirtyTextureObject()
void Texture::apply(State& state) const
{
// Texture* texture = const_cast<Texture*>(this);
// texture->_min_filter = LINEAR_MIPMAP_LINEAR;
// texture->_mag_filter = ANISOTROPIC;
// get the contextID (user defined ID of 0 upwards) for the
// current OpenGL context.
const uint contextID = state.getContextID();
@ -314,13 +320,9 @@ void Texture::applyTexParameters(GLenum target, State&) const
glTexParameteri( target, GL_TEXTURE_WRAP_T, wt );
glTexParameteri( target, GL_TEXTURE_MIN_FILTER, _min_filter);
glTexParameteri( target, GL_TEXTURE_MAG_FILTER, _mag_filter);
if (s_borderClampSupported)
{
glTexParameterfv(target, GL_TEXTURE_BORDER_COLOR, _borderColor.ptr());
}
if (_mag_filter == ANISOTROPIC)
if (_maxAnisotropy>1.0f)
{
// check for support for anisotropic filter,
// note since this is static varible it is intialised
@ -333,18 +335,16 @@ void Texture::applyTexParameters(GLenum target, State&) const
{
// note, GL_TEXTURE_MAX_ANISOTROPY_EXT will either be defined
// by gl.h (or via glext.h) or by include/osg/Texture.
glTexParameterf(target, GL_TEXTURE_MAX_ANISOTROPY_EXT, 2.f);
glTexParameterf(target, GL_TEXTURE_MAX_ANISOTROPY_EXT, _maxAnisotropy);
}
else
}
if (s_borderClampSupported)
{
glTexParameteri(target, GL_TEXTURE_MAG_FILTER, LINEAR);
}
}
else
{
glTexParameteri( _target, GL_TEXTURE_MAG_FILTER, _mag_filter);
glTexParameterfv(target, GL_TEXTURE_BORDER_COLOR, _borderColor.ptr());
}
_texParamtersDirty=false;
}

5
src/osgPlugins/flt/ReaderWriterATTR.cpp
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@ -652,12 +652,13 @@ StateSet* Attr::createOsgStateSet()
case MAG_FILTER_BICUBIC:
case MAG_FILTER_BICUBIC_GEQUAL:
case MAG_FILTER_BICUBIC_LEQUAL:
osgTexture->setFilter(osg::Texture::MAG_FILTER, Texture::ANISOTROPIC);
osgTexture->setFilter(osg::Texture::MAG_FILTER, Texture::LINEAR);
osgTexture->setMaxAnisotropy(2.0f);
break;
// case MAG_FILTER_ADD_DETAIL:
// case MAG_FILTER_MODULATE_DETAIL:
// osgTexture->setFilter(osg::Texture::MAG_FILTER, Texture::ANISOTROPIC);
// osgTexture->setFilter(osg::Texture::MAG_FILTER, Texture::LINEAR);
// break;
}

13
src/osgPlugins/osg/Texture.cpp
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@ -92,6 +92,15 @@ bool Texture_readLocalData(Object& obj, Input& fr)
iteratorAdvanced = true;
}
if (fr.matchSequence("maxAnisotropy %f"))
{
float anis=1.0f;
fr[1].getFloat(anis);
texture.setMaxAnisotropy(anis);
fr +=2 ;
iteratorAdvanced = true;
}
Texture::InternalFormatMode mode;
if (fr[0].matchWord("internalFormatMode") && Texture_matchInternalFormatModeStr(fr[1].getStr(),mode))
{
@ -198,6 +207,7 @@ bool Texture_writeLocalData(const Object& obj, Output& fw)
fw.indent() << "min_filter " << Texture_getFilterStr(texture.getFilter(Texture::MIN_FILTER)) << std::endl;
fw.indent() << "mag_filter " << Texture_getFilterStr(texture.getFilter(Texture::MAG_FILTER)) << std::endl;
fw.indent() << "maxAnisotropy " << texture.getMaxAnisotropy() << std::endl;
fw.indent() << "internalFormatMode " << Texture_getInternalFormatModeStr(texture.getInternalFormatMode()) << std::endl;
@ -264,7 +274,7 @@ bool Texture_matchFilterStr(const char* str,Texture::FilterMode& filter)
else if (strcmp(str,"LINEAR_MIPMAP_NEAREST")==0) filter = Texture::LINEAR_MIPMAP_NEAREST;
else if (strcmp(str,"NEAREST_MIPMAP_LINEAR")==0) filter = Texture::NEAREST_MIPMAP_LINEAR;
else if (strcmp(str,"LINEAR_MIPMAP_LINEAR")==0) filter = Texture::LINEAR_MIPMAP_LINEAR;
else if (strcmp(str,"ANISOTROPIC")==0) filter = Texture::ANISOTROPIC;
else if (strcmp(str,"ANISOTROPIC")==0) filter = Texture::LINEAR;
else return false;
return true;
}
@ -280,7 +290,6 @@ const char* Texture_getFilterStr(Texture::FilterMode filter)
case(Texture::LINEAR_MIPMAP_NEAREST): return "LINEAR_MIPMAP_NEAREST";
case(Texture::NEAREST_MIPMAP_LINEAR): return "NEAREST_MIPMAP_LINEAR";
case(Texture::LINEAR_MIPMAP_LINEAR): return "LINEAR_MIPMAP_LINEAR";
case(Texture::ANISOTROPIC): return "ANISOTROPIC";
}
return "";
}

2
src/osgUtil/Optimizer.cpp
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@ -22,8 +22,6 @@ using namespace osgUtil;
void Optimizer::optimize(osg::Node* node, unsigned int options)
{
return;
if (options & COMBINE_ADJACENT_LODS)
{
CombineLODsVisitor clv;