// Read / write a region of image data from multiple bands
func (dataset Dataset) IO(
rwFlag RWFlag,
xOff, yOff, xSize, ySize int,
buffer interface{},
bufXSize, bufYSize int,
bandCount int,
bandMap []int,
pixelSpace, lineSpace, bandSpace int,
) error {
var dataType DataType
var dataPtr unsafe.Pointer
switch data := buffer.(type) {
case []uint8:
dataType = Byte
dataPtr = unsafe.Pointer(&data[0])
case []int16:
dataType = Int16
dataPtr = unsafe.Pointer(&data[0])
case []uint16:
dataType = UInt16
dataPtr = unsafe.Pointer(&data[0])
case []int32:
dataType = Int32
dataPtr = unsafe.Pointer(&data[0])
case []uint32:
dataType = UInt32
dataPtr = unsafe.Pointer(&data[0])
case []float32:
dataType = Float32
dataPtr = unsafe.Pointer(&data[0])
case []float64:
dataType = Float64
dataPtr = unsafe.Pointer(&data[0])
case []complex64:
dataType = CFloat32
dataPtr = unsafe.Pointer(&data[0])
case []complex128:
dataType = CFloat64
dataPtr = unsafe.Pointer(&data[0])
default:
return fmt.Errorf("Error: buffer is not a valid data type (must be a valid numeric slice)")
}
err := C.GDALDatasetRasterIO(
dataset.cval,
C.GDALRWFlag(rwFlag),
C.int(xOff), C.int(yOff), C.int(xSize), C.int(ySize),
dataPtr,
C.int(bufXSize), C.int(bufYSize),
C.GDALDataType(dataType),
C.int(bandCount),
(*C.int)(unsafe.Pointer(&bandMap[0])),
C.int(pixelSpace), C.int(lineSpace), C.int(bandSpace))
if err != 0 {
return error(err)
}
return nil
}
// Read / Write a region of image data for this band
func (rasterBand RasterBand) IO(
rwFlag RWFlag,
xOff, yOff, xSize, ySize int,
buffer interface{},
bufXSize, bufYSize int,
pixelSpace, lineSpace int,
) error {
var dataType DataType
var dataPtr unsafe.Pointer
switch data := buffer.(type) {
case []int8:
dataType = Byte
dataPtr = unsafe.Pointer(&data[0])
case []uint8:
dataType = Byte
dataPtr = unsafe.Pointer(&data[0])
case []int16:
dataType = Int16
dataPtr = unsafe.Pointer(&data[0])
case []uint16:
dataType = UInt16
dataPtr = unsafe.Pointer(&data[0])
case []int32:
dataType = Int32
dataPtr = unsafe.Pointer(&data[0])
case []uint32:
dataType = UInt32
dataPtr = unsafe.Pointer(&data[0])
case []float32:
dataType = Float32
dataPtr = unsafe.Pointer(&data[0])
case []float64:
dataType = Float64
dataPtr = unsafe.Pointer(&data[0])
default:
return fmt.Errorf("Error: buffer is not a valid data type (must be a valid numeric slice)")
}
return C.GDALRasterIO(
rasterBand.cval,
C.GDALRWFlag(rwFlag),
C.int(xOff), C.int(yOff), C.int(xSize), C.int(ySize),
dataPtr,
C.int(bufXSize), C.int(bufYSize),
C.GDALDataType(dataType),
C.int(pixelSpace), C.int(lineSpace),
).Err()
}