// ConstantColors returns a slice of the constant pixel values of all channels within
// either the src image, or the specific channel range of the given ROI.
// If the image does not have constant colors in the given channel range, a nil value
// is returned.
func ConstantColors(src *ImageBuf, opts ...AlgoOpts) []float32 {
opt := flatAlgoOpts(opts)
// Determine how big of a slice to allocation,
// depending on whether they have passed an ROI
// or not.
num := src.NumChannels()
if opt.ROI != nil {
roi_num := opt.ROI.NumChannels()
if roi_num < num {
num = roi_num
}
}
values := make([]float32, num)
c_ptr := (*C.float)(unsafe.Pointer(&values[0]))
ok := C.is_constant_color(src.ptr, c_ptr, opt.ROI.validOrAllPtr(), C.int(opt.Threads))
if !bool(ok) {
return nil
}
return values
}
// IsConstantColor returns true if all pixels of src within the ROI have the same values
// (for the subset of channels described by roi)
func IsConstantColor(src *ImageBuf, opts ...AlgoOpts) bool {
opt := flatAlgoOpts(opts)
ok := C.is_constant_color(src.ptr, nil, opt.ROI.validOrAllPtr(), C.int(opt.Threads))
return bool(ok)
}
