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Added conversion of dataType to GL_UNSIGNED in raw data reading path.

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Robert Osfield 2005-02-01 09:38:07 +00:00
parent a927d924e1
commit 1cc89ba4fe
1 changed files with 49 additions and 15 deletions
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64
examples/osgvolume/osgvolume.cpp
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@ -977,30 +977,64 @@ osg::Image* readRaw(int sizeX, int sizeY, int sizeZ, int numberBytesPerComponent
}
}
// compute range of values
FindRangeOperator rangeOp;
for(int r=0;r<sizeR;++r)
// normalise texture
{
for(int t=0;t<sizeT;++t)
// compute range of values
FindRangeOperator rangeOp;
for(int r=0;r<sizeR;++r)
{
readRow(sizeS, pixelFormat, dataType, image->data(0,t,r), rangeOp);
for(int t=0;t<sizeT;++t)
{
readRow(sizeS, pixelFormat, dataType, image->data(0,t,r), rangeOp);
}
}
// scale the values
for(int r=0;r<sizeR;++r)
{
for(int t=0;t<sizeT;++t)
{
modifyRow(sizeS, pixelFormat, dataType, image->data(0,t,r), ScaleOperator(1.0f/rangeOp._rmax));
}
}
}
// scale the values
for(int r=0;r<sizeR;++r)
{
for(int t=0;t<sizeT;++t)
{
modifyRow(sizeS, pixelFormat, dataType, image->data(0,t,r), ScaleOperator(1.0f/rangeOp._rmax));
}
}
fin.close();
if (dataType!=GL_UNSIGNED_BYTE)
{
// need to convert to ubyte
osg::ref_ptr<osg::Image> new_image = new osg::Image;
new_image->allocateImage(sizeS, sizeT, sizeR, pixelFormat, GL_UNSIGNED_BYTE);
RecordRowOperator readOp(sizeS);
WriteRowOperator writeOp;
for(int r=0;r<sizeR;++r)
{
for(int t=0;t<sizeT;++t)
{
// reset the indices to begining
readOp._pos = 0;
writeOp._pos = 0;
// read the pixels into readOp's _colour array
readRow(sizeS, pixelFormat, dataType, image->data(0,t,r), readOp);
// pass readOp's _colour array contents over to writeOp (note this is just a pointer swap).
writeOp._colours.swap(readOp._colours);
modifyRow(sizeS, pixelFormat, GL_UNSIGNED_BYTE, new_image->data(0,t,r), writeOp);
// return readOp's _colour array contents back to its rightful owner.
writeOp._colours.swap(readOp._colours);
}
}
image = new_image;
}
return image.release();