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To TextureAtlasBuilder add copying of border pixels into margins to help improve quality of lower mipmap levels.

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This commit is contained in:
Robert Osfield 2006-08-30 16:33:30 +00:00
parent c4731804b8
commit 102215afb5
1 changed files with 126 additions and 3 deletions
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129
src/osgUtil/Optimizer.cpp
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@ -3191,6 +3191,12 @@ bool Optimizer::TextureAtlasBuilder::Source::suitableForAtlas(unsigned int maxim
break;
}
if ((_image->getPixelSizeInBits() % 8) != 0)
{
// pixel size not byte aligned so report as not suitable to prevent other atlas code from having problems with byte boundaries.
return false;
}
if (_texture.valid())
{
@ -3517,20 +3523,137 @@ void Optimizer::TextureAtlasBuilder::Atlas::copySources()
const osg::Image* sourceImage = source->_image.get();
osg::Image* atlasImage = atlas->_image.get();
unsigned int rowSize = sourceImage->getRowSizeInBytes();
unsigned int pixelSizeInBits = sourceImage->getPixelSizeInBits();
unsigned int pixelSizeInBytes = pixelSizeInBits/8;
unsigned int marginSizeInBytes = pixelSizeInBytes*_margin;
unsigned int x = source->_x;
unsigned int y = source->_y;
unsigned int rowWidth = sourceImage->getRowSizeInBytes();
for(int t=0; t<sourceImage->t(); ++t, ++y)
int t;
for(t=0; t<sourceImage->t(); ++t, ++y)
{
unsigned char* destPtr = atlasImage->data(x, y);
const unsigned char* sourcePtr = sourceImage->data(0, t);
for(unsigned int i=0; i<rowWidth; i++)
for(unsigned int i=0; i<rowSize; i++)
{
*(destPtr++) = *(sourcePtr++);
}
}
// copy top row margin
y = source->_y + sourceImage->t();
unsigned int m;
for(m=0; m<_margin; ++m, ++y)
{
unsigned char* destPtr = atlasImage->data(x, y);
const unsigned char* sourcePtr = sourceImage->data(0, sourceImage->t()-1);
for(unsigned int i=0; i<rowSize; i++)
{
*(destPtr++) = *(sourcePtr++);
}
}
// copy bottom row margin
y = source->_y-1;
for(m=0; m<_margin; ++m, --y)
{
unsigned char* destPtr = atlasImage->data(x, y);
const unsigned char* sourcePtr = sourceImage->data(0, 0);
for(unsigned int i=0; i<rowSize; i++)
{
*(destPtr++) = *(sourcePtr++);
}
}
// copy left column margin
y = source->_y;
for(t=0; t<sourceImage->t(); ++t, ++y)
{
x = source->_x-1;
for(m=0; m<_margin; ++m, --x)
{
unsigned char* destPtr = atlasImage->data(x, y);
const unsigned char* sourcePtr = sourceImage->data(0, t);
for(unsigned int i=0; i<pixelSizeInBytes; i++)
{
*(destPtr++) = *(sourcePtr++);
}
}
}
// copy right column margin
y = source->_y;
for(t=0; t<sourceImage->t(); ++t, ++y)
{
x = source->_x + sourceImage->s();
for(m=0; m<_margin; ++m, ++x)
{
unsigned char* destPtr = atlasImage->data(x, y);
const unsigned char* sourcePtr = sourceImage->data(sourceImage->s()-1, t);
for(unsigned int i=0; i<pixelSizeInBytes; i++)
{
*(destPtr++) = *(sourcePtr++);
}
}
}
// copy top left corner margin
y = source->_y + sourceImage->t();
for(m=0; m<_margin; ++m, ++y)
{
unsigned char* destPtr = atlasImage->data(source->_x - _margin, y);
unsigned char* sourcePtr = atlasImage->data(source->_x - _margin, y-1); // copy from row below
for(unsigned int i=0; i<marginSizeInBytes; i++)
{
*(destPtr++) = *(sourcePtr++);
}
}
// copy top right corner margin
y = source->_y + sourceImage->t();
for(m=0; m<_margin; ++m, ++y)
{
unsigned char* destPtr = atlasImage->data(source->_x + sourceImage->s(), y);
unsigned char* sourcePtr = atlasImage->data(source->_x + sourceImage->s(), y-1); // copy from row below
for(unsigned int i=0; i<marginSizeInBytes; i++)
{
*(destPtr++) = *(sourcePtr++);
}
}
// copy bottom left corner margin
y = source->_y - 1;
for(m=0; m<_margin; ++m, --y)
{
unsigned char* destPtr = atlasImage->data(source->_x - _margin, y);
unsigned char* sourcePtr = atlasImage->data(source->_x - _margin, y+1); // copy from row below
for(unsigned int i=0; i<marginSizeInBytes; i++)
{
*(destPtr++) = *(sourcePtr++);
}
}
// copy bottom right corner margin
y = source->_y - 1;
for(m=0; m<_margin; ++m, --y)
{
unsigned char* destPtr = atlasImage->data(source->_x + sourceImage->s(), y);
unsigned char* sourcePtr = atlasImage->data(source->_x + sourceImage->s(), y+1); // copy from row below
for(unsigned int i=0; i<marginSizeInBytes; i++)
{
*(destPtr++) = *(sourcePtr++);
}
}
}
}
#if 0
osg::notify(osg::NOTICE)<<"Writing atlas image "<<_image->getFileName()<<std::endl;
osgDB::writeImageFile(*_image,_image->getFileName());