void StereoManager::updateAllDependentRenderTargets(bool isLeftEye)
{
Ogre::uint32 mask;
if(isLeftEye)
{
mask = left_mask_;
}
else
{
mask = right_mask_;
}
RenderTargetList::iterator itarg, itargend;
itargend = rendertarget_list_.end();
for( itarg = rendertarget_list_.begin(); itarg != itargend; ++itarg )
{
Ogre::RenderTarget *rt = itarg->first;
int n = rt->getNumViewports();
std::vector<int> maskVector(n); // VS2005 gives a warning if I declare the vector as uint32 but not with int
for(int i = 0; i<n ; ++i)
{
maskVector[i] = rt->getViewport(i)->getVisibilityMask();
rt->getViewport(i)->setVisibilityMask(maskVector[i] & mask);
}
rt->update();
for(int i = 0; i<n ; ++i)
{
rt->getViewport(i)->setVisibilityMask(maskVector[i]);
}
}
}
QByteArray U2BitCompression::compress(const char* text, int len, int alphabetSize, const int* alphabetCharNums, U2OpStatus& os) {
// algorithm:
// 1. compute chars freq -> derive number of bits per char
// 2. assign bit masks per char. Do not assign any bit masks for non used alphabet chars
// 3. compress chars
// 4. create header with used char mask
// Result bits [len type][len][used alpha bits][compressed text]
// where [len type] is a type of length field: 00 -> empty, 01 -> 8 byte, 10 -> 16 bytes, 11 -> 32 bytes
// [len] - length of the result sequence
// [used alpha bits] bit is set if alpha char is used in the text.
// [compressed text] the data in compressed form
assert(alphabetSize <= 32); //avoid this check in runtime -> use this method correctly
// find all used chars in text
QVector<bool> visitVector(alphabetSize, false);
bool* visited = visitVector.data();
for (int i = 0; i < len; i++) {
uchar c = text[i];
int n = alphabetCharNums[c];
if (n == -1) {
os.setError(tr("Bit compression: illegal character in text '%1'").arg(char(c)));
return QByteArray();
}
if (!visited[n]) {
visited[n] = true;
}
}
// assign sequential bit-mask for all used chars
QVector<uchar> maskVector(alphabetSize, 0);
uchar* mask = maskVector.data();
uchar m = 0;
for (int i = 0; i < alphabetSize; i++) {
if (visited[i]) {
mask[i] = m;
m++;
}
}
// store header and data to bit set
int bitsPerChar = U2Bits::getNumberOfBitsPerChar(m);
int compressedBitSize = len * bitsPerChar;
int lenBits = getLenBitsSize(len);
int headerSizeBits = 2 + lenBits + alphabetSize;
int resultSizeBits = headerSizeBits + compressedBitSize;
static QByteArray res;
QByteArray bitSet = U2Bits::allocateBits(resultSizeBits);
uchar* bits = (uchar*)bitSet.data();
writeLength(bits, len, lenBits);
int pos = 2 + lenBits;
for (; pos < alphabetSize; pos++) {
if (visited[pos]) {
U2Bits::setBit(bits, pos);
}
}
for (int i = 0; i < len; i++, pos+=bitsPerChar) {
uchar c = text[i];
int n = alphabetCharNums[c];
uchar m = mask[n];
U2Bits::setBits(bits, pos, &m, bitsPerChar);
}
return bitSet;
}
