298 lines
9.6 KiB
C++
298 lines
9.6 KiB
C++
/* -*-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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#include <osg/GLExtensions>
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#include <osg/TextureRectangle>
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#include <osg/State>
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#include <osg/GLU>
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#include <osg/Notify>
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#ifndef GL_UNPACK_CLIENT_STORAGE_APPLE
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#define GL_UNPACK_CLIENT_STORAGE_APPLE 0x85B2
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#endif
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#ifndef GL_APPLE_vertex_array_range
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#define GL_VERTEX_ARRAY_RANGE_APPLE 0x851D
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#define GL_VERTEX_ARRAY_RANGE_LENGTH_APPLE 0x851E
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#define GL_VERTEX_ARRAY_STORAGE_HINT_APPLE 0x851F
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#define GL_VERTEX_ARRAY_RANGE_POINTER_APPLE 0x8521
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#define GL_STORAGE_CACHED_APPLE 0x85BE
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#define GL_STORAGE_SHARED_APPLE 0x85BF
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#endif
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using namespace osg;
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TextureRectangle::TextureRectangle():
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_textureWidth(0),
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_textureHeight(0)
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{
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setWrap(WRAP_S, CLAMP);
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setWrap(WRAP_T, CLAMP);
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setFilter(MIN_FILTER, LINEAR);
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setFilter(MAG_FILTER, LINEAR);
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}
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TextureRectangle::TextureRectangle(Image* image):
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_textureWidth(0),
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_textureHeight(0)
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{
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setWrap(WRAP_S, CLAMP);
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setWrap(WRAP_T, CLAMP);
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setFilter(MIN_FILTER, LINEAR);
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setFilter(MAG_FILTER, LINEAR);
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setImage(image);
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}
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TextureRectangle::TextureRectangle(const TextureRectangle& text,const CopyOp& copyop):
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Texture(text,copyop),
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_image(copyop(text._image.get())),
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_textureWidth(text._textureWidth),
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_textureHeight(text._textureHeight),
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_subloadCallback(text._subloadCallback)
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{
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}
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TextureRectangle::~TextureRectangle()
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{
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}
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int TextureRectangle::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(TextureRectangle,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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int result = _image->compare(*rhs._image);
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if (result!=0) return result;
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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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int result = compareTexture(rhs);
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if (result!=0) return result;
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// compare each paramter in turn against the rhs.
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COMPARE_StateAttribute_Parameter(_textureWidth)
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COMPARE_StateAttribute_Parameter(_textureHeight)
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COMPARE_StateAttribute_Parameter(_subloadCallback)
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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 TextureRectangle::setImage(Image* image)
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{
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// delete old texture objects.
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dirtyTextureObject();
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_image = image;
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}
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void TextureRectangle::apply(State& state) const
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{
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static bool s_rectangleSupported = isGLExtensionSupported("GL_EXT_texture_rectangle") || isGLExtensionSupported("GL_NV_texture_rectangle");
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if (!s_rectangleSupported)
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{
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notify(WARN)<<"Warning: TextureRectangle::apply(..) failed, texture rectangle is not support by your OpenGL drivers."<<std::endl;
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return;
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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 unsigned int contextID = state.getContextID();
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// get the texture object for the current contextID.
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TextureObject* textureObject = getTextureObject(contextID);
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if (textureObject != 0)
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{
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textureObject->bind();
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if (getTextureParameterDirty(state.getContextID()))
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applyTexParameters(GL_TEXTURE_RECTANGLE, state);
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if (_subloadCallback.valid())
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{
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_subloadCallback->subload(*this, state);
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}
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else if (_image.valid() && getModifiedTag(contextID) != _image->getModifiedTag())
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{
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applyTexImage_subload(GL_TEXTURE_RECTANGLE, _image.get(), state, _textureWidth, _textureHeight, _internalFormat);
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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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}
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}
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else if (_subloadCallback.valid())
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{
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// we don't have a applyTexImage1D_subload yet so can't reuse.. so just generate a new texture object.
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_textureObjectBuffer[contextID] = textureObject = getTextureObjectManager()->generateTextureObject(contextID,GL_TEXTURE_RECTANGLE);
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textureObject->bind();
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applyTexParameters(GL_TEXTURE_RECTANGLE, state);
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_subloadCallback->load(*this, state);
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textureObject->setAllocated(1,_internalFormat,_textureWidth,_textureHeight,1,0);
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// in theory the following line is redundant, 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(GL_TEXTURE_RECTANGLE, handle);
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}
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else if (_image.valid() && _image->data())
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{
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// we don't have a applyTexImage1D_subload yet so can't reuse.. so just generate a new texture object.
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_textureObjectBuffer[contextID] = textureObject = getTextureObjectManager()->generateTextureObject(contextID,GL_TEXTURE_RECTANGLE);
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textureObject->bind();
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applyTexParameters(GL_TEXTURE_RECTANGLE, state);
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applyTexImage_load(GL_TEXTURE_RECTANGLE, _image.get(), state, _textureWidth, _textureHeight);
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textureObject->setAllocated(1,_internalFormat,_textureWidth,_textureHeight,1,0);
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if (_unrefImageDataAfterApply && areAllTextureObjectsLoaded() && getDataVariance()==STATIC)
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{
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TextureRectangle* non_const_this = const_cast<TextureRectangle*>(this);
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non_const_this->_image = 0;
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}
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}
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else
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{
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glBindTexture(GL_TEXTURE_RECTANGLE, 0);
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}
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}
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void TextureRectangle::applyTexParameters(GLenum target, 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 unsigned int contextID = state.getContextID();
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glTexParameteri( target, GL_TEXTURE_WRAP_S, _wrap_s );
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glTexParameteri( target, GL_TEXTURE_WRAP_T, _wrap_t );
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glTexParameteri( target, GL_TEXTURE_MIN_FILTER, _min_filter);
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glTexParameteri( target, GL_TEXTURE_MAG_FILTER, _mag_filter);
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getTextureParameterDirty(contextID) = false;
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}
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void TextureRectangle::applyTexImage_load(GLenum target, Image* image, State& state, GLsizei& inwidth, GLsizei& inheight) 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 unsigned int contextID = state.getContextID();
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const Extensions* extensions = getExtensions(contextID,true);
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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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// compute the internal texture format, sets _internalFormat.
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computeInternalFormat();
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glPixelStorei(GL_UNPACK_ALIGNMENT, image->getPacking());
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bool useClientStorage = extensions->isClientStorageSupported() && getClientStorageHint();
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if (useClientStorage)
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{
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glPixelStorei(GL_UNPACK_CLIENT_STORAGE_APPLE,GL_TRUE);
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glTexParameterf(target,GL_TEXTURE_PRIORITY,0.0f);
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#ifdef GL_TEXTURE_STORAGE_HINT_APPLE
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glTexParameteri(target, GL_TEXTURE_STORAGE_HINT_APPLE , GL_STORAGE_CACHED_APPLE);
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#endif
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}
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// UH: ignoring compressed for now.
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glTexImage2D(target, 0, _internalFormat,
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image->s(), image->t(), 0,
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(GLenum)image->getPixelFormat(),
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(GLenum)image->getDataType(),
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image->data());
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inwidth = image->s();
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inheight = image->t();
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if (useClientStorage)
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{
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glPixelStorei(GL_UNPACK_CLIENT_STORAGE_APPLE,GL_FALSE);
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}
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}
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void TextureRectangle::applyTexImage_subload(GLenum target, Image* image, State& state, GLsizei& inwidth, GLsizei& inheight, GLint& inInternalFormat) 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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if (image->s()!=inwidth || image->t()!=inheight || image->getInternalTextureFormat()!=inInternalFormat)
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{
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applyTexImage_load(target, image, state, inwidth, inheight);
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return;
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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 unsigned int 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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// compute the internal texture format, sets _internalFormat.
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computeInternalFormat();
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glPixelStorei(GL_UNPACK_ALIGNMENT, image->getPacking());
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// UH: ignoring compressed for now.
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glTexSubImage2D(target, 0,
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0,0,
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image->s(), image->t(),
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(GLenum)image->getPixelFormat(),
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(GLenum)image->getDataType(),
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image->data());
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}
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void TextureRectangle::computeInternalFormat() const
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{
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if (_image.valid())
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computeInternalFormatWithImage(*_image);
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}
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