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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76
src/osg/Texture.cpp
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@@ -19,26 +19,27 @@ using namespace osg;
Texture::DeletedTextureObjectCache Texture::s_deletedTextureObjectCache;
Texture::Texture():
_unrefImageAfterApply(false),
_target(GL_TEXTURE_2D),
_wrap_s(CLAMP),
_wrap_t(CLAMP),
_wrap_r(CLAMP),
_min_filter(LINEAR_MIPMAP_LINEAR), // trilinear
_mag_filter(LINEAR),
_texParamtersDirty(true),
_internalFormatMode(USE_IMAGE_DATA_FORMAT),
_internalFormatValue(0),
_borderColor(0.0, 0.0, 0.0, 0.0),
_textureWidth(0),
_textureHeight(0),
_subloadMode(OFF),
_subloadTextureOffsetX(0),
_subloadTextureOffsetY(0),
_subloadImageOffsetX(0),
_subloadImageOffsetY(0),
_subloadImageWidth(0),
_subloadImageHeight(0)
_unrefImageAfterApply(false),
_target(GL_TEXTURE_2D),
_wrap_s(CLAMP),
_wrap_t(CLAMP),
_wrap_r(CLAMP),
_min_filter(LINEAR_MIPMAP_LINEAR), // trilinear
_mag_filter(LINEAR),
_maxAnisotropy(1.0f),
_texParamtersDirty(true),
_internalFormatMode(USE_IMAGE_DATA_FORMAT),
_internalFormatValue(0),
_borderColor(0.0, 0.0, 0.0, 0.0),
_textureWidth(0),
_textureHeight(0),
_subloadMode(OFF),
_subloadTextureOffsetX(0),
_subloadTextureOffsetY(0),
_subloadImageOffsetX(0),
_subloadImageOffsetY(0),
_subloadImageWidth(0),
_subloadImageHeight(0)
{
_handleList.resize(DisplaySettings::instance()->getMaxNumberOfGraphicsContexts(),0);
_modifiedTag.resize(DisplaySettings::instance()->getMaxNumberOfGraphicsContexts(),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);
}
else
{
glTexParameteri(target, GL_TEXTURE_MAG_FILTER, LINEAR);
glTexParameterf(target, GL_TEXTURE_MAX_ANISOTROPY_EXT, _maxAnisotropy);
}
}
else
if (s_borderClampSupported)
{
glTexParameteri( _target, GL_TEXTURE_MAG_FILTER, _mag_filter);
glTexParameterfv(target, GL_TEXTURE_BORDER_COLOR, _borderColor.ptr());
}
_texParamtersDirty=false;
}