private void DirectWriteBSQNormal(int xOffset, int yOffset, int xSize, int ySize, IntPtr buffer, enumDataType dataType, int xBufferSize, int yBufferSize)
{
IVirtualScan0 virtualScan0 = _rasterDataProvider as IVirtualScan0;
if (virtualScan0.IsVirtualScan0)
{
xOffset += virtualScan0.OffsetX;
yOffset += virtualScan0.OffsetY;
}
if (xOffset == 0 && xSize == _width)
{
DirectWriteBSQNormalQuickly(yOffset, ySize, buffer, dataType);
}
else
{
int srcDataTypeSize = DataTypeHelper.SizeOf(_dataType);
int rowSize = _width * srcDataTypeSize;
long offset = yOffset * rowSize + xOffset * srcDataTypeSize;
int rowBlockSize = xSize * srcDataTypeSize;
int rightBank = _width * srcDataTypeSize - rowBlockSize;
byte[] rowBlockBuffer = new byte[rowBlockSize];
for (int row = 0; row < ySize; row++,
offset = offset + rowBlockSize + rightBank,
buffer = IntPtr.Add(buffer, rowBlockSize))
{
Marshal.Copy(buffer, rowBlockBuffer, 0, rowBlockSize);
_accessor.WriteArray <byte>(offset, rowBlockBuffer, 0, rowBlockSize);
}
}
}
private void DirectReadBSQNormal(int xOffset, int yOffset, int xSize, int ySize, IntPtr buffer, enumDataType dataType, int xBufferSize, int yBufferSize)
{
IVirtualScan0 virtualScan0 = _rasterDataProvider as IVirtualScan0;
if (virtualScan0.IsVirtualScan0)
{
xOffset += virtualScan0.OffsetX;
yOffset += virtualScan0.OffsetY;
}
int srcDataTypeSize = DataTypeHelper.SizeOf(_dataType);
int rowSize = _width * srcDataTypeSize;
int offset = yOffset * rowSize;
int endRow = yOffset + ySize;
int colOffset = xOffset * srcDataTypeSize;
int srcRowBlockSize = xSize * srcDataTypeSize;
byte[] srcRowBlockBuffer = new byte[srcRowBlockSize];
int dstRowBlockSize = xBufferSize * srcDataTypeSize;
byte[] dstRowBlockBuffer = new byte[dstRowBlockSize];
offset += colOffset;
float rowScale = ySize / (float)yBufferSize;
float colScale = xSize / (float)xBufferSize;
int srcRow = 0;
for (int dstRow = 0; dstRow < yBufferSize; dstRow++, srcRow = (int)(dstRow * rowScale), buffer = IntPtr.Add(buffer, dstRowBlockSize))
{
_accessor.ReadArray <byte>(offset + srcRow * rowSize, srcRowBlockBuffer, 0, srcRowBlockSize);
for (int dstCol = 0; dstCol < xBufferSize; dstCol++)
{
int srcCol = (int)(dstCol * colScale);
int dstIdx = dstCol * srcDataTypeSize;
int srcIdx = srcCol * srcDataTypeSize;
for (int b = 0; b < srcDataTypeSize; b++)
{
dstRowBlockBuffer[dstIdx + b] = srcRowBlockBuffer[srcIdx + b];
}
}
Marshal.Copy(dstRowBlockBuffer, 0, buffer, dstRowBlockSize);
}
}
