float ImageAccess::getScalar(VectorXi position, uchar channel) const {
if(mImage->getDimensions() == 2)
position = Vector3i(position.x(), position.y(), 0);
switch(mImage->getDataType()) {
fastSwitchTypeMacro(return getScalarAsFloat<FAST_TYPE>((FAST_TYPE*)mData, position, mImage, channel))
}
}
void setScalarAsFloat(T* data, VectorXi position, Image::pointer image, float value, uchar channel) {
Vector3ui size = image->getSize();
if(position.x() < 0 || position.y() < 0 || position.z() < 0 ||
position.x() > size.x()-1 || position.y() > size.y()-1 || position.z() > size.z()-1 || channel >= image->getNrOfComponents())
throw OutOfBoundsException();
uint address = (position.x() + position.y()*size.x() + position.z()*size.x()*size.y())*image->getNrOfComponents() + channel;
if(image->getDataType() == TYPE_SNORM_INT16) {
data[address] = value * 32767.0f;;
} else if(image->getDataType() == TYPE_UNORM_INT16) {
data[address] = value * 65535.0f;;
} else {
data[address] = value;
}
}
void ImageAccess::setScalar(VectorXi position, float value, uchar channel) {
Vector3i size(mImage->getWidth(), mImage->getHeight(), mImage->getDepth());
if(mImage->getDimensions() == 2)
position = Vector3i(position.x(), position.y(), 0);
switch(mImage->getDataType()) {
fastSwitchTypeMacro(setScalarAsFloat<FAST_TYPE>((FAST_TYPE*)mData, position, mImage, value, channel))
}
}
float getScalarAsFloat(T* data, VectorXi position, Image::pointer image, uchar channel) {
Vector3ui size = image->getSize();
if(position.x() < 0 || position.y() < 0 || position.z() < 0 ||
position.x() > size.x()-1 || position.y() > size.y()-1 || position.z() > size.z()-1 || channel >= image->getNrOfComponents())
throw OutOfBoundsException();
T value = data[(position.x() + position.y()*size.x() + position.z()*size.x()*size.y())*image->getNrOfComponents() + channel];
float floatValue;
if(image->getDataType() == TYPE_SNORM_INT16) {
floatValue = std::max(-1.0f, (float)value / 32767.0f);
} else if(image->getDataType() == TYPE_UNORM_INT16) {
floatValue = (float)value / 65535.0f;
} else {
floatValue = value;
}
return floatValue;
}
