Function copyData

src/cinder/GeomIo.cpp:198–260

} // anonymous namespace

void copyData( uint8_t srcDimensions, size_t srcStrideBytes, const float *srcData, size_t numElements, uint8_t dstDimensions, size_t dstStrideBytes, float *dstData )
{
	if( srcStrideBytes == 0 )
		srcStrideBytes = srcDimensions * sizeof(float);
	if( dstStrideBytes == 0 )
		dstStrideBytes = dstDimensions * sizeof(float);

	if( srcDimensions == 0 ) { // fill with zeros
		for( size_t v = 0; v < numElements; ++v ) {
			for( uint8_t d = 0; d < dstDimensions; ++d )
				dstData[d] = 0;
			dstData = (float*)((uint8_t*)dstData + dstStrideBytes);	
		}
	}
	else if( srcStrideBytes == srcDimensions * sizeof(float) ) 	// call equivalent method that doesn't support srcStrideBytes
		copyData( srcDimensions, srcData, numElements, dstDimensions, dstStrideBytes, dstData );
	// we can get away with a memcpy
	else if( (srcDimensions == dstDimensions) && (dstStrideBytes == dstDimensions * sizeof(float)) && (srcStrideBytes == dstStrideBytes) ) {
		memcpy( dstData, srcData, numElements * srcDimensions * sizeof(float) );
	}
	else {
		switch( srcDimensions ) {
			case 1:
				switch( dstDimensions ) {
					case 1: copyDataImpl<1,1>( srcData, srcStrideBytes, numElements, dstStrideBytes, dstData ); break;
					case 2: copyDataImpl<1,2>( srcData, srcStrideBytes, numElements, dstStrideBytes, dstData ); break;
					case 3: copyDataImpl<1,3>( srcData, srcStrideBytes, numElements, dstStrideBytes, dstData ); break;
					case 4: copyDataImpl<1,4>( srcData, srcStrideBytes, numElements, dstStrideBytes, dstData ); break;
					default: throw ExcIllegalDestDimensions();
				}
			break;
			case 2:
				switch( dstDimensions ) {
					case 1: copyDataImpl<2,1>( srcData, srcStrideBytes, numElements, dstStrideBytes, dstData ); break;
					case 2: copyDataImpl<2,2>( srcData, srcStrideBytes, numElements, dstStrideBytes, dstData ); break;
					case 3: copyDataImpl<2,3>( srcData, srcStrideBytes, numElements, dstStrideBytes, dstData ); break;
					case 4: copyDataImpl<2,4>( srcData, srcStrideBytes, numElements, dstStrideBytes, dstData ); break;
					default: throw ExcIllegalDestDimensions();
				}
			break;
			case 3:
				switch( dstDimensions ) {
					case 1: copyDataImpl<3,1>( srcData, srcStrideBytes, numElements, dstStrideBytes, dstData ); break;
					case 2: copyDataImpl<3,2>( srcData, srcStrideBytes, numElements, dstStrideBytes, dstData ); break;
					case 3: copyDataImpl<3,3>( srcData, srcStrideBytes, numElements, dstStrideBytes, dstData ); break;
					case 4: copyDataImpl<3,4>( srcData, srcStrideBytes, numElements, dstStrideBytes, dstData ); break;
					default: throw ExcIllegalDestDimensions();
				}
			break;
			case 4:
				switch( dstDimensions ) {
					case 1: copyDataImpl<4,1>( srcData, srcStrideBytes, numElements, dstStrideBytes, dstData ); break;
					case 2: copyDataImpl<4,2>( srcData, srcStrideBytes, numElements, dstStrideBytes, dstData ); break;
					case 3: copyDataImpl<4,3>( srcData, srcStrideBytes, numElements, dstStrideBytes, dstData ); break;
					case 4: copyDataImpl<4,4>( srcData, srcStrideBytes, numElements, dstStrideBytes, dstData ); break;
					default: throw ExcIllegalDestDimensions();
				}
			break;