dump_window_imageT_dump_window_imageDumpWindowImageDumpWindowImagedump_window_image (算子)

名称

dump_window_imageT_dump_window_imageDumpWindowImageDumpWindowImagedump_window_image — 将窗口内容写入图像对象中。

签名

dump_window_image( : Image : WindowHandle : )

描述

dump_window_imagedump_window_imageDumpWindowImageDumpWindowImageDumpWindowImagedump_window_image writes the content of the graphics window (WindowHandleWindowHandleWindowHandleWindowHandlewindowHandlewindow_handle) in an image (ImageImageImageImageimageimage). To transform gray values the current color table of the window is used.

注意

Under Unix-like systems, the graphics window must be completely visible on the root window, because otherwise the contents of the window cannot be read due to limitations in X Windows.

执行信息

多线程类型：可重入（与非独占算子并行运行）。
多线程作用域：全局（可从任何线程调用）。
未采用并行化处理。

参数

ImageImageImageImageimageimage (输出对象) image → object (byte)

Saved image.

WindowHandleWindowHandleWindowHandleWindowHandlewindowHandlewindow_handle (输入控制) window → (handle)

窗口句柄。

结果

If the window is valid dump_window_imagedump_window_imageDumpWindowImageDumpWindowImageDumpWindowImagedump_window_image 返回 2 ( H_MSG_TRUE )。如有必要，则抛出异常。

可能的前趋

open_windowopen_windowOpenWindowOpenWindowOpenWindowopen_window, set_drawset_drawSetDrawSetDrawSetDrawset_draw, set_colorset_colorSetColorSetColorSetColorset_color, set_coloredset_coloredSetColoredSetColoredSetColoredset_colored, set_line_widthset_line_widthSetLineWidthSetLineWidthSetLineWidthset_line_width, disp_regiondisp_regionDispRegionDispRegionDispRegiondisp_region

另见

open_windowopen_windowOpenWindowOpenWindowOpenWindowopen_window, set_systemset_systemSetSystemSetSystemSetSystemset_system, dump_windowdump_windowDumpWindowDumpWindowDumpWindowdump_window

模块

基础

算子