void MWC64XSeedGenerator::generateRandomSeeds(Buffer<uvec2>* buffer, unsigned int seed, bool useGLSharing /*= true*/, size_t localWorkGroupSize /*= 256*/) {
if (kernel_ == NULL) {
return;
}
srand(seed);
// MWC64X random number generator
BufferRAM* bufferRAM = buffer->getEditableRepresentation<BufferRAM>();
uvec2* randomNumbers = static_cast<uvec2*>(bufferRAM->getData());
int nRandomSeeds = static_cast<int>(bufferRAM->getSize());
for (int i = 0; i < nRandomSeeds; ++i) {
randomNumbers[i].x = static_cast<cl_uint>(rand());
}
// Data will be transferred to OpenCL device before new representation is returned.
if (useGLSharing) {
SyncCLGL glSync;
BufferCLGL* randomSeedBufferCL = buffer->getEditableRepresentation<BufferCLGL>();
glSync.addToAquireGLObjectList(randomSeedBufferCL);
glSync.aquireAllObjects();
generateSeeds(randomSeedBufferCL, nRandomSeeds, localWorkGroupSize);
} else {
BufferCLBase* randomSeedBufferCL = buffer->getEditableRepresentation<BufferCL>();
generateSeeds(randomSeedBufferCL, nRandomSeeds, localWorkGroupSize);
}
}
void BufferGL2RAMConverter::update(const DataRepresentation* source,
DataRepresentation* destination) {
const BufferGL* src = static_cast<const BufferGL*>(source);
BufferRAM* dst = static_cast<BufferRAM*>(destination);
dst->setSize(src->getSize());
src->download(dst->getData());
}
DataRepresentation* BufferGL2RAMConverter::createFrom(const DataRepresentation* source) {
const BufferGL* src = static_cast<const BufferGL*>(source);
BufferRAM* dst = createBufferRAM(src->getSize(), src->getDataFormat(), src->getBufferType(),
src->getBufferUsage());
if (!dst)
throw ConverterException(std::string("Cannot convert format from GL to RAM: ") +
src->getDataFormat()->getString(), IvwContext);
src->download(dst->getData());
return dst;
}