Golang C.goGDALProgressFuncProxyB类(方法)实例源码

// Compute the proximity of all pixels in the image to a set of pixels in the source image
func (src RasterBand) ComputeProximity(
	dest RasterBand,
	options []string,
	progress ProgressFunc,
	data interface{},
) error {
	arg := &goGDALProgressFuncProxyArgs{
		progress, data,
	}

	length := len(options)
	opts := make([]*C.char, length+1)
	for i := 0; i < length; i++ {
		opts[i] = C.CString(options[i])
		defer C.free(unsafe.Pointer(opts[i]))
	}
	opts[length] = (*C.char)(unsafe.Pointer(nil))

	err := C.GDALComputeProximity(
		src.cval,
		dest.cval,
		(**C.char)(unsafe.Pointer(&opts[0])),
		C.goGDALProgressFuncProxyB(),
		unsafe.Pointer(arg),
	)
	return err
}

// Removes small raster polygons
func (src RasterBand) SieveFilter(
	mask, dest RasterBand,
	threshold, connectedness int,
	options []string,
	progress ProgressFunc,
	data interface{},
) error {
	arg := &goGDALProgressFuncProxyArgs{
		progress, data,
	}

	length := len(options)
	opts := make([]*C.char, length+1)
	for i := 0; i < length; i++ {
		opts[i] = C.CString(options[i])
		defer C.free(unsafe.Pointer(opts[i]))
	}
	opts[length] = (*C.char)(unsafe.Pointer(nil))

	err := C.GDALSieveFilter(
		src.cval,
		mask.cval,
		dest.cval,
		C.int(threshold),
		C.int(connectedness),
		(**C.char)(unsafe.Pointer(&opts[0])),
		C.goGDALProgressFuncProxyB(),
		unsafe.Pointer(arg),
	)
	return error(err)
}

// Fill selected raster regions by interpolation from the edges
func (src RasterBand) FillNoData(
	mask RasterBand,
	distance float64,
	iterations int,
	options []string,
	progress ProgressFunc,
	data interface{},
) error {
	arg := &goGDALProgressFuncProxyArgs{
		progress, data,
	}

	length := len(options)
	opts := make([]*C.char, length+1)
	for i := 0; i < length; i++ {
		opts[i] = C.CString(options[i])
		defer C.free(unsafe.Pointer(opts[i]))
	}
	opts[length] = (*C.char)(unsafe.Pointer(nil))

	err := C.GDALFillNodata(
		src.cval,
		mask.cval,
		C.double(distance),
		0,
		C.int(iterations),
		(**C.char)(unsafe.Pointer(&opts[0])),
		C.goGDALProgressFuncProxyB(),
		unsafe.Pointer(arg),
	)
	return error(err)
}

// Create polygon coverage from raster data using a floating point buffer
func (src RasterBand) FPolygonize(
	mask RasterBand,
	layer Layer,
	fieldIndex int,
	options []string,
	progress ProgressFunc,
	data interface{},
) error {
	arg := &goGDALProgressFuncProxyArgs{
		progress, data,
	}

	length := len(options)
	opts := make([]*C.char, length+1)
	for i := 0; i < length; i++ {
		opts[i] = C.CString(options[i])
		defer C.free(unsafe.Pointer(opts[i]))
	}
	opts[length] = (*C.char)(unsafe.Pointer(nil))

	err := C.GDALFPolygonize(
		src.cval,
		mask.cval,
		layer.cval,
		C.int(fieldIndex),
		(**C.char)(unsafe.Pointer(&opts[0])),
		C.goGDALProgressFuncProxyB(),
		unsafe.Pointer(arg),
	)
	return error(err)
}

// Build raster overview(s)
func (dataset Dataset) BuildOverviews(
	resampling string,
	nOverviews int,
	overviewList []int,
	nBands int,
	bandList []int,
	progress ProgressFunc,
	data interface{},
) error {
	cResampling := C.CString(resampling)
	defer C.free(unsafe.Pointer(cResampling))

	arg := &goGDALProgressFuncProxyArgs{progress, data}

	err := C.GDALBuildOverviews(
		dataset.cval,
		cResampling,
		C.int(nOverviews),
		(*C.int)(unsafe.Pointer(&overviewList[0])),
		C.int(nBands),
		(*C.int)(unsafe.Pointer(&bandList[0])),
		C.goGDALProgressFuncProxyB(),
		unsafe.Pointer(arg),
	)
	if err != 0 {
		return error(err)
	}

	return nil
}

// Copy all dataset raster data
func (sourceDataset Dataset) CopyWholeRaster(
	destDataset Dataset,
	options []string,
	progress ProgressFunc,
	data interface{},
) error {
	arg := &goGDALProgressFuncProxyArgs{progress, data}

	length := len(options)
	cOptions := make([]*C.char, length+1)
	for i := 0; i < length; i++ {
		cOptions[i] = C.CString(options[i])
		defer C.free(unsafe.Pointer(cOptions[i]))
	}
	cOptions[length] = (*C.char)(unsafe.Pointer(nil))

	err := C.GDALDatasetCopyWholeRaster(
		sourceDataset.cval,
		destDataset.cval,
		(**C.char)(unsafe.Pointer(&cOptions[0])),
		C.goGDALProgressFuncProxyB(),
		unsafe.Pointer(arg),
	)
	if err != 0 {
		return error(err)
	}

	return nil
}

// Fetch default raster histogram
func (rb RasterBand) DefaultHistogram(
	force int,
	progress ProgressFunc,
	data interface{},
) (min, max float64, buckets int, histogram []int, err error) {
	arg := &goGDALProgressFuncProxyArgs{
		progress, data,
	}

	var cHistogram *C.int

	cErr := C.GDALGetDefaultHistogram(
		rb.cval,
		(*C.double)(&min),
		(*C.double)(&max),
		(*C.int)(unsafe.Pointer(&buckets)),
		&cHistogram,
		C.int(force),
		C.goGDALProgressFuncProxyB(),
		unsafe.Pointer(arg),
	)
	if cErr != 0 {
		return min, max, buckets, histogram, error(cErr)
	}

	sliceHeader := (*reflect.SliceHeader)(unsafe.Pointer(&histogram))
	sliceHeader.Cap = buckets
	sliceHeader.Len = buckets
	sliceHeader.Data = uintptr(unsafe.Pointer(cHistogram))

	return min, max, buckets, histogram, nil
}

// Compute raster histogram
func (rb RasterBand) Histogram(
	min, max float64,
	buckets int,
	includeOutOfRange, approxOK int,
	progress ProgressFunc,
	data interface{},
) ([]int, error) {
	arg := &goGDALProgressFuncProxyArgs{
		progress, data,
	}

	histogram := make([]int, buckets)

	err := C.GDALGetRasterHistogram(
		rb.cval,
		C.double(min),
		C.double(max),
		C.int(buckets),
		(*C.int)(unsafe.Pointer(&histogram[0])),
		C.int(includeOutOfRange),
		C.int(approxOK),
		C.goGDALProgressFuncProxyB(),
		unsafe.Pointer(arg),
	)
	if err != 0 {
		return nil, error(err)
	}

	return histogram, nil
}

// Build raster overview(s)
func (dataset Dataset) BuildOverviews(
	resampling string,
	nOverviews int,
	overviewList []int,
	nBands int,
	bandList []int,
	progress ProgressFunc,
	data interface{},
) error {
	cResampling := C.CString(resampling)
	defer C.free(unsafe.Pointer(cResampling))

	arg := &goGDALProgressFuncProxyArgs{progress, data}

	return C.GDALBuildOverviews(
		dataset.cval,
		cResampling,
		C.int(nOverviews),
		(*C.int)(unsafe.Pointer(&IntSliceToCInt(overviewList)[0])),
		C.int(nBands),
		(*C.int)(unsafe.Pointer(&IntSliceToCInt(bandList)[0])),
		C.goGDALProgressFuncProxyB(),
		unsafe.Pointer(arg),
	).Err()
}

// Compute raster histogram
func (rb RasterBand) Histogram(
	min, max float64,
	buckets int,
	includeOutOfRange, approxOK int,
	progress ProgressFunc,
	data interface{},
) ([]int, error) {
	arg := &goGDALProgressFuncProxyArgs{
		progress, data,
	}

	histogram := make([]C.int, buckets)

	if err := C.GDALGetRasterHistogramEx(
		rb.cval,
		C.double(min),
		C.double(max),
		C.int(buckets),
		(*C.GUIntBig)(unsafe.Pointer(&histogram[0])),
		C.int(includeOutOfRange),
		C.int(approxOK),
		C.goGDALProgressFuncProxyB(),
		unsafe.Pointer(arg),
	).Err(); err != nil {
		return nil, err
	} else {
		return CIntSliceToInt(histogram), nil
	}
}

// Create a copy of a dataset
func (driver Driver) CreateCopy(
	filename string,
	sourceDataset Dataset,
	strict int,
	options []string,
	progress ProgressFunc,
	data interface{},
) Dataset {
	name := C.CString(filename)
	defer C.free(unsafe.Pointer(name))

	length := len(options)
	opts := make([]*C.char, length+1)
	for i := 0; i < length; i++ {
		opts[i] = C.CString(options[i])
		defer C.free(unsafe.Pointer(opts[i]))
	}
	opts[length] = (*C.char)(unsafe.Pointer(nil))

	var h C.GDALDatasetH

	if progress == nil {
		h = C.GDALCreateCopy(
			driver.cval, name,
			sourceDataset.cval,
			C.int(strict),
			(**C.char)(unsafe.Pointer(&opts[0])),
			nil,
			nil,
		)
	} else {
		arg := &goGDALProgressFuncProxyArgs{
			progress, data,
		}
		h = C.GDALCreateCopy(
			driver.cval, name,
			sourceDataset.cval,
			C.int(strict), (**C.char)(unsafe.Pointer(&opts[0])),
			C.goGDALProgressFuncProxyB(),
			unsafe.Pointer(arg),
		)
	}

	return Dataset{h}
}

// Reproject image
func (src Dataset) ReprojectImage(
	srcProjWKT string,
	dst Dataset,
	dstProjWKT string,
	resampleAlg ResampleAlg,
	memLimit, maxError float64,
	progress ProgressFunc,
	data interface{},
	options WarpOptions,
) error {
	var pf C.GDALProgressFunc
	var pa unsafe.Pointer
	if progress != nil {
		pf = C.goGDALProgressFuncProxyB()
		pa = unsafe.Pointer(&goGDALProgressFuncProxyArgs{progress, data})
	}

	var c_srcWKT, c_dstWKT *C.char
	if srcProjWKT != "" {
		c_srcWKT = C.CString(srcProjWKT)
		defer C.free(unsafe.Pointer(c_srcWKT))
	}
	if dstProjWKT != "" {
		c_dstWKT = C.CString(dstProjWKT)
		defer C.free(unsafe.Pointer(c_dstWKT))
	}

	err := C.GDALReprojectImage(
		src.cval,
		c_srcWKT,
		dst.cval,
		c_dstWKT,
		C.GDALResampleAlg(resampleAlg),
		C.double(memLimit),
		C.double(maxError),
		pf,
		pa,
		options,
	)
	if err != 0 {
		return error(err)
	}
	return nil
}

// Compute image statistics
func (rasterBand RasterBand) ComputeStatistics(
	approxOK int,
	progress ProgressFunc,
	data interface{},
) (min, max, mean, stdDev float64) {
	arg := &goGDALProgressFuncProxyArgs{progress, data}

	C.GDALComputeRasterStatistics(
		rasterBand.cval,
		C.int(approxOK),
		(*C.double)(unsafe.Pointer(&min)),
		(*C.double)(unsafe.Pointer(&max)),
		(*C.double)(unsafe.Pointer(&mean)),
		(*C.double)(unsafe.Pointer(&stdDev)),
		C.goGDALProgressFuncProxyB(),
		unsafe.Pointer(arg),
	)
	return min, max, mean, stdDev
}

// 24bit to 8bit conversion with dithering
func DitherRGB2PCT(
	red, green, blue, target RasterBand,
	ct ColorTable,
	progress ProgressFunc,
	data interface{},
) int {
	arg := &goGDALProgressFuncProxyArgs{
		progress, data,
	}

	err := C.GDALDitherRGB2PCT(
		red.cval,
		green.cval,
		blue.cval,
		target.cval,
		ct.cval,
		C.goGDALProgressFuncProxyB(),
		unsafe.Pointer(arg),
	)
	return int(err)
}

// Compute optimal PCT for RGB image
func ComputeMedianCutPCT(
	red, green, blue RasterBand,
	colors int,
	ct ColorTable,
	progress ProgressFunc,
	data interface{},
) int {
	arg := &goGDALProgressFuncProxyArgs{
		progress, data,
	}

	err := C.GDALComputeMedianCutPCT(
		red.cval,
		green.cval,
		blue.cval,
		nil,
		C.int(colors),
		ct.cval,
		C.goGDALProgressFuncProxyB(),
		unsafe.Pointer(arg),
	)
	return int(err)
}

// Copy all raster band raster data
func (sourceRaster RasterBand) RasterBandCopyWholeRaster(
	destRaster RasterBand,
	options []string,
	progress ProgressFunc,
	data interface{},
) error {
	arg := &goGDALProgressFuncProxyArgs{progress, data}

	length := len(options)
	cOptions := make([]*C.char, length+1)
	for i := 0; i < length; i++ {
		cOptions[i] = C.CString(options[i])
		defer C.free(unsafe.Pointer(cOptions[i]))
	}
	cOptions[length] = (*C.char)(unsafe.Pointer(nil))

	return C.GDALRasterBandCopyWholeRaster(
		sourceRaster.cval,
		destRaster.cval,
		(**C.char)(unsafe.Pointer(&cOptions[0])),
		C.goGDALProgressFuncProxyB(),
		unsafe.Pointer(arg),
	).Err()
}