query_grayT_query_grayQueryGrayQueryGrayquery_gray (Operator)
Name
query_grayT_query_grayQueryGrayQueryGrayquery_gray
— Query the displayable gray values.
Signature
Description
query_grayquery_grayQueryGrayQueryGrayquery_gray
returns all gray values that are used for
gray value output (disp_imagedisp_imageDispImageDispImagedisp_image
) and that can be reproduced
exactly in the window. They can be set with the
set_grayset_graySetGraySetGrayset_gray
call.
Execution Information
- Multithreading type: reentrant (runs in parallel with non-exclusive operators).
- Multithreading scope: global (may be called from any thread).
- Processed without parallelization.
Parameters
WindowHandleWindowHandleWindowHandlewindowHandlewindow_handle
(input_control) window →
HWindow, HTupleHHandleHTupleHtuple (handle) (IntPtr) (HHandle) (handle)
Window handle.
GrayvalGrayvalGrayvalgrayvalgrayval
(output_control) integer-array →
HTupleSequence[int]HTupleHtuple (integer) (int / long) (Hlong) (Hlong)
Tuple of all displayable gray values.
Result
query_grayquery_grayQueryGrayQueryGrayquery_gray
returns 2 (
H_MSG_TRUE)
, if the window is
valid. Otherwise an exception is raised.
Possible Successors
set_grayset_graySetGraySetGrayset_gray
,
disp_regiondisp_regionDispRegionDispRegiondisp_region
See also
set_grayset_graySetGraySetGrayset_gray
,
disp_imagedisp_imageDispImageDispImagedisp_image
Module
Foundation