query_grayT_query_grayQueryGrayQueryGray (Operator)

Name

query_grayT_query_grayQueryGrayQueryGray — Query the displayable gray values.

Signature

query_gray( : : WindowHandle : Grayval)

Description

query_grayquery_grayQueryGrayQueryGrayQueryGray returns all gray values that are used for gray value output (disp_imagedisp_imageDispImageDispImageDispImage) and that can be reproduced exactly in the window. They can be set with the set_grayset_graySetGraySetGraySetGray 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

WindowHandleWindowHandleWindowHandleWindowHandlewindowHandle (input_control) window → (integer)

Window handle.

GrayvalGrayvalGrayvalGrayvalgrayval (output_control) integer-array → (integer)

Tuple of all displayable gray values.

Result

query_grayquery_grayQueryGrayQueryGrayQueryGray returns 2 (H_MSG_TRUE), if the window is valid. Otherwise an exception is raised.

Possible Successors

set_grayset_graySetGraySetGraySetGray, disp_regiondisp_regionDispRegionDispRegionDispRegion

See also

set_grayset_graySetGraySetGraySetGray, disp_imagedisp_imageDispImageDispImageDispImage

Module

Foundation