void VertexAttributeSet::combineBuffers()
{
// calculate stride & number of vertices
unsigned int stride = 0;
unsigned int numberOfVertices = 0;
for ( unsigned int index = 0; index < static_cast<unsigned int>(AttributeID::VERTEX_ATTRIB_COUNT); ++index )
{
AttributeID id = static_cast<AttributeID>(index);
if ( isEnabled( id ) )
{
VertexAttribute attribute = getVertexAttribute( id );
stride += attribute.getVertexDataBytes();
if ( !numberOfVertices )
{
numberOfVertices = attribute.getVertexDataCount();
}
else
{
DP_ASSERT( numberOfVertices == attribute.getVertexDataCount() );
}
}
}
// create one big buffer with all data
BufferSharedPtr newBufferSharedPtr = BufferHost::create();
newBufferSharedPtr->setSize( numberOfVertices * stride );
unsigned int offset = 0;
for ( unsigned int index = 0; index < static_cast<unsigned int>(AttributeID::VERTEX_ATTRIB_COUNT); ++index )
{
AttributeID id = static_cast<AttributeID>(index);
if ( isEnabled( id ) )
{
VertexAttribute attributeNew;
const VertexAttribute& attributeOld = getVertexAttribute( id );
attributeNew.setData( attributeOld.getVertexDataSize(), attributeOld.getVertexDataType(), newBufferSharedPtr, offset, stride, numberOfVertices );
Buffer::DataReadLock drl(attributeOld.getBuffer());
Buffer::DataWriteLock dwl(attributeNew.getBuffer(), Buffer::MapMode::READWRITE );
dp::util::stridedMemcpy( dwl.getPtr(), attributeNew.getVertexDataOffsetInBytes(), attributeNew.getVertexDataStrideInBytes(),
drl.getPtr(), attributeOld.getVertexDataOffsetInBytes(), attributeOld.getVertexDataStrideInBytes(),
attributeOld.getVertexDataBytes(), numberOfVertices
);
offset += attributeOld.getVertexDataBytes();
setVertexAttribute( id, attributeNew, true );
}
}
}
