a364875afb
easier to specify which modes and attributes have been modified without the user requiring to know to what value, or to have an equivilant attribute to pass to the have_applied_attribute method. The original have_applied(mode) and have_applied(attribute) methods have been renamed have_applied_mode(), have_applied_attribute() as this was required to prevent the mode and type values colliding during compile (it was causing a compile error when the method names were the same.)
599 lines
19 KiB
C++
599 lines
19 KiB
C++
#if defined(_MSC_VER)
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#pragma warning( disable : 4786 )
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#endif
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#include <osg/ref_ptr>
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#include <osg/Image>
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#include <osg/Texture>
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#include <osg/State>
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#include <osg/Notify>
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#include <osg/GLExtensions>
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#include <osg/GLU>
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using namespace osg;
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Texture::DeletedTextureObjectCache Texture::s_deletedTextureObjectCache;
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Texture::Texture()
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{
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_handleList.resize(DisplaySettings::instance()->getMaxNumberOfGraphicsContexts(),0);
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_modifiedTag.resize(DisplaySettings::instance()->getMaxNumberOfGraphicsContexts(),0);
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_target = GL_TEXTURE_2D;
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_textureUnit = 0;
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_wrap_s = CLAMP;
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_wrap_t = CLAMP;
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_wrap_r = CLAMP;
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//_min_filter = LINEAR_MIPMAP_LINEAR; // trilinear
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//_min_filter = LINEAR_MIPMAP_NEAREST; // bilinear
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_min_filter = NEAREST_MIPMAP_LINEAR; // OpenGL default
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_mag_filter = LINEAR;
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_internalFormatMode = USE_IMAGE_DATA_FORMAT;
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_internalFormatValue = 0;
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_textureWidth = _textureHeight = 0;
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_textureObjectSize = 0;
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_subloadMode = OFF;
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_subloadOffsX = _subloadOffsY = 0;
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_borderColor.set(0.0, 0.0, 0.0, 0.0);//OpenGL default
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_texParamtersDirty = true;
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}
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Texture::~Texture()
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{
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// delete old texture objects.
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dirtyTextureObject();
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}
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int Texture::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(Texture,sa)
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if (_image!=rhs._image) // smart pointer comparison.
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{
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if (_image.valid())
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{
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if (rhs._image.valid())
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{
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if (_image->getFileName()<rhs._image->getFileName()) return -1;
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else if (_image->getFileName()>rhs._image->getFileName()) return 1;;
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}
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else
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{
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return 1; // valid lhs._image is greater than null.
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}
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}
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else if (rhs._image.valid())
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{
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return -1; // valid rhs._image is greater than null.
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}
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}
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// compare each paramter in turn against the rhs.
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COMPARE_StateAttribute_Parameter(_textureUnit)
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COMPARE_StateAttribute_Parameter(_wrap_s)
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COMPARE_StateAttribute_Parameter(_wrap_t)
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COMPARE_StateAttribute_Parameter(_wrap_r)
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COMPARE_StateAttribute_Parameter(_min_filter)
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COMPARE_StateAttribute_Parameter(_mag_filter)
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COMPARE_StateAttribute_Parameter(_internalFormatMode)
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COMPARE_StateAttribute_Parameter(_internalFormatValue)
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COMPARE_StateAttribute_Parameter(_textureWidth)
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COMPARE_StateAttribute_Parameter(_textureHeight)
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COMPARE_StateAttribute_Parameter(_subloadMode)
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COMPARE_StateAttribute_Parameter(_subloadOffsX)
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COMPARE_StateAttribute_Parameter(_subloadOffsY)
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return 0; // passed all the above comparison macro's, must be equal.
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}
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void Texture::setImage(Image* image)
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{
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// delete old texture objects.
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for(TextureNameList::iterator itr=_handleList.begin();
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itr!=_handleList.end();
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++itr)
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{
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if (*itr != 0)
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{
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// contact global texture object handler to delete texture objects
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// in appropriate context.
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// glDeleteTextures( 1L, (const GLuint *)itr );
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*itr = 0;
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}
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}
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_image = image;
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}
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void Texture::setWrap(const WrapParameter which, const WrapMode wrap)
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{
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switch( which )
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{
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case WRAP_S : _wrap_s = wrap; _texParamtersDirty = true; break;
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case WRAP_T : _wrap_t = wrap; _texParamtersDirty = true; break;
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case WRAP_R : _wrap_r = wrap; _texParamtersDirty = true; break;
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default : notify(WARN)<<"Error: invalid 'which' passed Texture::setWrap("<<(unsigned int)which<<","<<(unsigned int)wrap<<")"<<std::endl; break;
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}
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}
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const Texture::WrapMode Texture::getWrap(const WrapParameter which) const
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{
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switch( which )
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{
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case WRAP_S : return _wrap_s;
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case WRAP_T : return _wrap_t;
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case WRAP_R : return _wrap_r;
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default : notify(WARN)<<"Error: invalid 'which' passed Texture::getWrap(which)"<<std::endl; return _wrap_s;
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}
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}
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void Texture::setFilter(const FilterParameter which, const FilterMode filter)
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{
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switch( which )
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{
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case MIN_FILTER : _min_filter = filter; _texParamtersDirty = true; break;
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case MAG_FILTER : _mag_filter = filter; _texParamtersDirty = true; break;
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default : notify(WARN)<<"Error: invalid 'which' passed Texture::setFilter("<<(unsigned int)which<<","<<(unsigned int)filter<<")"<<std::endl; break;
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}
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}
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const Texture::FilterMode Texture::getFilter(const FilterParameter which) const
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{
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switch( which )
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{
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case MIN_FILTER : return _min_filter;
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case MAG_FILTER : return _mag_filter;
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default : notify(WARN)<<"Error: invalid 'which' passed Texture::getFilter(which)"<< std::endl; return _min_filter;
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}
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}
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/** Force a recompile on next apply() of associated OpenGL texture objects.*/
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void Texture::dirtyTextureObject()
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{
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for(uint i=0;i<_handleList.size();++i)
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{
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if (_handleList[i] != 0)
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{
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Texture::deleteTextureObject(i,_handleList[i]);
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_handleList[i] = 0;
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}
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}
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}
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void Texture::apply(State& state) const
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{
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// get the contextID (user defined ID of 0 upwards) for the
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// current OpenGL context.
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const uint contextID = state.getContextID();
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// get the globj for the current contextID.
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GLuint& handle = getHandle(contextID);
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// For multi-texturing will need something like...
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// glActiveTextureARB((GLenum)(GL_TEXTURE0_ARB+_textureUnit));
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if (handle != 0)
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{
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if (_subloadMode == OFF)
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{
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glBindTexture( _target, handle );
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if (_texParamtersDirty) applyTexParameters(_target,state);
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}
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else if (_image.valid() && _image->data())
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{
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uint& modifiedTag = getModifiedTag(contextID);
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if (_subloadMode == AUTO ||
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(_subloadMode == IF_DIRTY && modifiedTag != _image->getModifiedTag()))
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{
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glBindTexture( _target, handle );
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if (_texParamtersDirty) applyTexParameters(_target,state);
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glTexSubImage2D(_target, 0,
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_subloadOffsX, _subloadOffsY,
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_image->s(), _image->t(),
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(GLenum) _image->pixelFormat(), (GLenum) _image->dataType(),
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_image->data());
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// update the modified flag to show that the image has been loaded.
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modifiedTag = _image->getModifiedTag();
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}
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}
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}
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else if (_image.valid() && _image->data())
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{
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glGenTextures( 1L, (GLuint *)&handle );
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glBindTexture( _target, handle );
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applyTexParameters(_target,state);
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applyTexImage(_target,_image.get(),state);
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// in theory the following line is redundent, but in practice
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// have found that the first frame drawn doesn't apply the textures
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// unless a second bind is called?!!
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// perhaps it is the first glBind which is not required...
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glBindTexture( _target, handle );
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}
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}
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void Texture::compile(State& state) const
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{
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apply(state);
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}
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void Texture::applyTexParameters(GLenum target, State&) const
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{
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WrapMode ws = _wrap_s, wt = _wrap_t;
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// GL_IBM_texture_mirrored_repeat, fall-back REPEAT
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static bool s_mirroredSupported = isGLExtensionSupported("GL_IBM_texture_mirrored_repeat");
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if (!s_mirroredSupported)
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{
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if (ws == MIRROR)
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ws = REPEAT;
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if (wt == MIRROR)
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wt = REPEAT;
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}
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// GL_EXT_texture_edge_clamp, fall-back CLAMP
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static bool s_edgeClampSupported = isGLExtensionSupported("GL_EXT_texture_edge_clamp");
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if (!s_edgeClampSupported)
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{
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if (ws == CLAMP_TO_EDGE)
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ws = CLAMP;
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if (wt == CLAMP_TO_EDGE)
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wt = CLAMP;
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}
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static bool s_borderClampSupported = isGLExtensionSupported("GL_ARB_texture_border_clamp");
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if(!s_borderClampSupported)
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{
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if(ws == CLAMP_TO_BORDER)
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ws = CLAMP;
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if(wt == CLAMP_TO_BORDER)
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wt = CLAMP;
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}
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glTexParameteri( target, GL_TEXTURE_WRAP_S, ws );
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glTexParameteri( target, GL_TEXTURE_WRAP_T, wt );
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glTexParameteri( target, GL_TEXTURE_MIN_FILTER, _min_filter);
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if (s_borderClampSupported)
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{
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glTexParameterfv(target, GL_TEXTURE_BORDER_COLOR, _borderColor.ptr());
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}
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if (_mag_filter == ANISOTROPIC)
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{
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// check for support for anisotropic filter,
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// note since this is static varible it is intialised
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// only on the first time entering this code block,
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// is then never reevaluated on subsequent calls.
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static bool s_anisotropicSupported =
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isGLExtensionSupported("GL_EXT_texture_filter_anisotropic");
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if (s_anisotropicSupported)
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{
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// note, GL_TEXTURE_MAX_ANISOTROPY_EXT will either be defined
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// by gl.h (or via glext.h) or by include/osg/Texture.
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glTexParameterf(target, GL_TEXTURE_MAX_ANISOTROPY_EXT, 2.f);
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}
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else
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{
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glTexParameteri(target, GL_TEXTURE_MAG_FILTER, LINEAR);
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}
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}
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else
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{
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glTexParameteri( _target, GL_TEXTURE_MAG_FILTER, _mag_filter);
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}
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_texParamtersDirty=false;
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}
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void Texture::applyTexImage(GLenum target, Image* image, State& state) const
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{
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// if we don't have a valid image we can't create a texture!
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if (!image || !image->data())
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return;
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// get the contextID (user defined ID of 0 upwards) for the
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// current OpenGL context.
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const uint contextID = state.getContextID();
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// update the modified tag to show that it is upto date.
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getModifiedTag(contextID) = image->getModifiedTag();
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if (_subloadMode == OFF)
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image->ensureDimensionsArePowerOfTwo();
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glPixelStorei(GL_UNPACK_ALIGNMENT,image->packing());
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static bool s_ARB_Compression = isGLExtensionSupported("GL_ARB_texture_compression");
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static bool s_S3TC_Compression = isGLExtensionSupported("GL_EXT_texture_compression_s3tc");
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// select the internalFormat required for the texture.
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int internalFormat = image->internalFormat();
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switch(_internalFormatMode)
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{
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case(USE_IMAGE_DATA_FORMAT):
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internalFormat = image->internalFormat();
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break;
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case(USE_ARB_COMPRESSION):
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if (s_ARB_Compression)
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{
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switch(image->pixelFormat())
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{
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case(1): internalFormat = GL_COMPRESSED_ALPHA_ARB; break;
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case(2): internalFormat = GL_COMPRESSED_LUMINANCE_ALPHA_ARB; break;
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case(3): internalFormat = GL_COMPRESSED_RGB_ARB; break;
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case(4): internalFormat = GL_COMPRESSED_RGBA_ARB; break;
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case(GL_RGB): internalFormat = GL_COMPRESSED_RGB_ARB; break;
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case(GL_RGBA): internalFormat = GL_COMPRESSED_RGBA_ARB; break;
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case(GL_ALPHA): internalFormat = GL_COMPRESSED_ALPHA_ARB; break;
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case(GL_LUMINANCE): internalFormat = GL_COMPRESSED_LUMINANCE_ARB; break;
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case(GL_LUMINANCE_ALPHA): internalFormat = GL_COMPRESSED_LUMINANCE_ALPHA_ARB; break;
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case(GL_INTENSITY): internalFormat = GL_COMPRESSED_INTENSITY_ARB; break;
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}
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}
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else internalFormat = image->internalFormat();
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break;
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case(USE_S3TC_DXT1_COMPRESSION):
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if (s_S3TC_Compression)
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{
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switch(image->pixelFormat())
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{
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case(3): internalFormat = GL_COMPRESSED_RGB_S3TC_DXT1_EXT; break;
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case(4): internalFormat = GL_COMPRESSED_RGBA_S3TC_DXT1_EXT; break;
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case(GL_RGB): internalFormat = GL_COMPRESSED_RGB_S3TC_DXT1_EXT; break;
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case(GL_RGBA): internalFormat = GL_COMPRESSED_RGBA_S3TC_DXT1_EXT; break;
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default: internalFormat = image->internalFormat(); break;
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}
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}
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else internalFormat = image->internalFormat();
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break;
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case(USE_S3TC_DXT3_COMPRESSION):
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if (s_S3TC_Compression)
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{
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switch(image->pixelFormat())
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{
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case(3):
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case(GL_RGB): internalFormat = GL_COMPRESSED_RGB_S3TC_DXT1_EXT; break;
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case(4):
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case(GL_RGBA): internalFormat = GL_COMPRESSED_RGBA_S3TC_DXT3_EXT; break;
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default: internalFormat = _image->internalFormat(); break;
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}
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}
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else internalFormat = image->internalFormat();
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break;
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case(USE_S3TC_DXT5_COMPRESSION):
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if (s_S3TC_Compression)
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{
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switch(image->pixelFormat())
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{
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case(3):
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case(GL_RGB): internalFormat = GL_COMPRESSED_RGB_S3TC_DXT1_EXT; break;
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case(4):
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case(GL_RGBA): internalFormat = GL_COMPRESSED_RGBA_S3TC_DXT5_EXT; break;
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default: internalFormat = image->internalFormat(); break;
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}
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}
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else internalFormat = image->internalFormat();
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break;
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case(USE_USER_DEFINED_FORMAT):
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internalFormat = _internalFormatValue;
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break;
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}
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if (_subloadMode == OFF) {
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if( _min_filter == LINEAR || _min_filter == NEAREST )
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{
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glTexImage2D( target, 0, internalFormat,
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image->s(), image->t(), 0,
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(GLenum)image->pixelFormat(),
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(GLenum)image->dataType(),
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image->data() );
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// just estimate estimate it right now..
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// note, ignores texture compression..
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_textureObjectSize = image->s()*image->t()*4;
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}
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else
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{
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gluBuild2DMipmaps( target, internalFormat,
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image->s(),image->t(),
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(GLenum)image->pixelFormat(), (GLenum)image->dataType(),
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image->data() );
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// just estimate size it right now..
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// crude x2 multiplier to account for minmap storage.
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// note, ignores texture compression..
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_textureObjectSize = image->s()*image->t()*4;
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}
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_textureWidth = image->s();
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_textureHeight = image->t();
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}
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else
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{
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static bool s_SGIS_GenMipmap = isGLExtensionSupported("GL_SGIS_generate_mipmap");
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if (s_SGIS_GenMipmap && (_min_filter != LINEAR && _min_filter != NEAREST)) {
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glTexParameteri(target, GL_GENERATE_MIPMAP_SGIS, GL_TRUE);
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}
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// calculate texture dimension
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_textureWidth = 1;
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for (; _textureWidth < (_subloadOffsX + image->s()); _textureWidth <<= 1)
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;
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_textureHeight = 1;
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for (; _textureHeight < (_subloadOffsY + image->t()); _textureHeight <<= 1)
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;
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// reserve appropriate texture memory
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glTexImage2D(target, 0, internalFormat,
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_textureWidth, _textureHeight, 0,
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(GLenum) image->pixelFormat(), (GLenum) image->dataType(),
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NULL);
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glTexSubImage2D(target, 0,
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_subloadOffsX, _subloadOffsY,
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image->s(), image->t(),
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(GLenum) image->pixelFormat(), (GLenum) image->dataType(),
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image->data());
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}
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}
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/** use deleteTextureObject instead of glDeleteTextures to allow
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* OpenGL texture objects to cached until they can be deleted
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* by the OpenGL context in which they were created, specified
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* by contextID.*/
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void Texture::deleteTextureObject(uint contextID,GLuint handle)
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{
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if (handle!=0)
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{
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// insert the handle into the cache for the appropriate context.
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s_deletedTextureObjectCache[contextID].insert(handle);
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}
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}
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/** flush all the cached display list which need to be deleted
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* in the OpenGL context related to contextID.*/
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void Texture::flushDeletedTextureObjects(uint contextID)
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{
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DeletedTextureObjectCache::iterator citr = s_deletedTextureObjectCache.find(contextID);
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if (citr!=s_deletedTextureObjectCache.end())
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{
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std::set<uint>& textureObjectSet = citr->second;
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for(std::set<uint>::iterator titr=textureObjectSet.begin();
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titr!=textureObjectSet.end();
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++titr)
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{
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glDeleteTextures( 1L, (const GLuint *)&(*titr ));
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}
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s_deletedTextureObjectCache.erase(citr);
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}
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}
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void Texture::copyTexImage2D(State& state, int x, int y, int width, int height )
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{
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const uint contextID = state.getContextID();
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// get the globj for the current contextID.
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GLuint& handle = getHandle(contextID);
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if (handle)
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{
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if (width==(int)_textureWidth && height==(int)_textureHeight)
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{
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// we have a valid texture object which is the right size
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// so lets play clever and use copyTexSubImage2D instead.
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// this allows use to reuse the texture object and avoid
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// expensive memory allocations.
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copyTexSubImage2D(state,0 ,0, x, y, width, height);
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return;
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}
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// the relevent texture object is not of the right size so
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// needs to been deleted
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// remove previously bound textures.
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dirtyTextureObject();
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// note, dirtyTextureObject() dirties all the texture objects for
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// this texture, is this right? Perhaps we should dirty just the
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// one for this context. Note sure yet will leave till later.
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// RO July 2001.
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}
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// For multi-texturing will need something like...
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// glActiveTextureARB((GLenum)(GL_TEXTURE0_ARB+_textureUnit));
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// remove any previously assigned images as these are nolonger valid.
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_image = NULL;
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// switch off mip-mapping.
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_min_filter = LINEAR;
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_mag_filter = LINEAR;
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// Get a new 2d texture handle.
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glGenTextures( 1, &handle );
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glBindTexture( _target, handle );
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applyTexParameters(_target,state);
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glCopyTexImage2D( _target, 0, GL_RGBA, x, y, width, height, 0 );
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/* Redundant, delete later */
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// glBindTexture( _target, handle );
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_textureWidth = width;
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_textureHeight = height;
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// cout<<"copyTexImage2D x="<<x<<" y="<<y<<" w="<<width<<" h="<<height<< std::endl;
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// inform state that this texture is the current one bound.
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state.have_applied_attribute(this);
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}
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void Texture::copyTexSubImage2D(State& state, int xoffset, int yoffset, int x, int y, int width, int height )
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{
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const uint contextID = state.getContextID();
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// get the globj for the current contextID.
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GLuint& handle = getHandle(contextID);
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if (handle)
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{
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// we have a valid image
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glBindTexture( _target, handle );
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applyTexParameters(_target,state);
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glCopyTexSubImage2D( _target, 0, xoffset,yoffset, x, y, width, height);
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/* Redundant, delete later */
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glBindTexture( _target, handle );
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// inform state that this texture is the current one bound.
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state.have_applied_attribute(this);
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}
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else
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{
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// no texture object already exsits for this context so need to
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// create it upfront - simply call copyTexImage2D.
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copyTexImage2D(state,x,y,width,height);
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}
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}
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