FGFS-4.1/OpenSceneGraph
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Checked in new methods for setting up texture subloading, these allow the

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user to control which parts on an image are subloaded from, and how big
the initial texture is.
This commit is contained in:
Robert Osfield
2002-07-28 23:28:27 +00:00
parent 02bb66a572
commit 6b59f66d80
3 changed files with 145 additions and 69 deletions
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17
src/osg/TextureCubeMap.cpp
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@@ -195,20 +195,31 @@ void TextureCubeMap::apply(State& state) const
modifiedTag = 0;
glBindTexture( _target, handle );
if (_texParamtersDirty) applyTexParameters(_target,state);
unsigned int rowwidth = 0;
for (int n=0; n<6; n++)
{
if ((_subloadMode == AUTO) ||
(_subloadMode == IF_DIRTY && modifiedTag != _images[n]->getModifiedTag()))
{
if (rowwidth != _images[n]->getRowSizeInBytes())
{
rowwidth = _images[n]->getRowSizeInBytes();
glPixelStorei(GL_UNPACK_ROW_LENGTH,rowwidth);
}
glTexSubImage2D(faceTarget[n], 0,
_subloadOffsX, _subloadOffsY,
(_subloadWidth>0)?_subloadWidth:_images[n]->s(), (_subloadHeight>0)?_subloadHeight:_images[n]->t(),
_subloadTextureOffsetX, _subloadTextureOffsetX,
(_subloadImageWidth>0)?_subloadImageWidth:_images[n]->s(), (_subloadImageHeight>0)?_subloadImageHeight:_images[n]->t(),
(GLenum) _images[n]->getPixelFormat(), (GLenum) _images[n]->getDataType(),
_images[n]->data());
_images[n]->data(_subloadImageOffsetX,_subloadImageOffsetY));
// update the modified flag to show that the image has been loaded.
modifiedTag += _images[n]->getModifiedTag();
}
}
glPixelStorei(GL_UNPACK_ROW_LENGTH,0);
}
}
else if (imagesValid())