GTK / GDK算法对所有显示器进行完整截图 [英] GTK/GDK Algorithm to take full screenshots of all monitors

问题描述

我对整个GTK游戏相当陌生，并且想创建一个算法来截取所有显示器的屏幕截图。

我正在考虑以下几点：

1. gdk_display_manager_list_displays


2. 每个显示可以有多个屏幕（屏幕意味着监视器？），所以使用 gdk_display_get_n_screens 来从 1


3. 从 2
获取所有屏幕的root gtk窗口

4. 为每个屏幕的每个根gtk窗口创建新的Pixbuf从 3 用 gdk_pixbuf_new


5. 填充每个pixbuf 4 与 gdk_pixbuf_get_from_drawable 用于从 3 每个相应的根窗口用于从每个相应的屏 1 （可能需要 gdk_drawable_get_size code> 2 和 gdk_window_get_origin ，其中每个参数都指向pixbuf）


6. gd k_pixbuf_get_pixels 对于每个PIXBUF





这是一个可行的解决方案？




解决方案

如果您确信 cRootWin 不是NULL和 cWidth 和 cHeight 大于0，那么你应该检查一下 by the doc 。



疯狂的猜测是你的程序确实没有足够的内存来存储像素图（通常为6 Mb）。我会尝试分配12 Mb来查看是否属于这种情况。




I'm fairly new to the whole GTK game and want to create an algorithm to take screen shot of all monitors.

I was thinking something along these lines:

1. gdk_display_manager_list_displays
2. each display can have multiple screens (screens means monitors?) so use gdk_display_get_n_screens to get monitors per display from 1
3. get root gtk window of all screens from 2
4. create new Pixbuf for each root gtk window for each screen from 3 with gdk_pixbuf_new
5. fill each pixbuf from 4 with gdk_pixbuf_get_from_drawable for each respective root window from 3 for each respective screen from 2 for each respective display from 1 (may need to gdk_drawable_get_size and gdk_window_get_origin for each for args to pixbuf)
6. gdk_pixbuf_get_pixels for each pixbuf

Is this a workable solution?

解决方案

If you are sure cRootWin is not NULL and cWidth and cHeight are greater than 0 then you should check for some additional problem mentioned by the doc.

A wild guess is your program does not have enough memory to store the pixmap (typically 6 Mb). I would try to allocate the 12 Mb just to see if this is the case.

这篇关于GTK / GDK算法对所有显示器进行完整截图的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！