在窗口的特定区域中创建GLX上下文 [英] Create GLX context in specific region of a window

问题描述

我想在窗口内使用GLX创建OpenGL上下文.但是，我不希望它跨越整个窗口区域.相反，它应该只覆盖一个子区域.

I would like to create an OpenGL context with GLX inside a window. However, I do not want it to span over the whole window region. Instead, it should only cover a subregion.

例如，GLUT为此功能提供了一个功能.同样，诸如GTK +或QT之类的主要工具包也提供了GL小部件，它们只是X窗口的子区域.但是我需要低级工作.

For example, GLUT provides a function for this behaviour. Also major toolkits like GTK+ or QT provide GL widgets, which are only subregions of X windows. However I need to work low-level.

glXMakeCurrent()接受X Drawable标识符.是否可以将Drawable定义为窗口的子区域?还是有其他方法将上下文绑定到窗口区域?

glXMakeCurrent() accepts a X Drawable identifier. Is it possible to define a Drawable as being a subregion of a window? Or are there other ways to bind the context to a window region?

GLX参考(蓝皮书)

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推荐答案

我在 BSD联机帮助页:

在几乎所有对您而言重要的方面，子窗口都像一个顶层窗口.它有一个窗口ID.它有自己的事件回调集；您可以渲染它；通知您其创建；...

In almost every regard that is important to you, a subwindow is like a top-level window. It has a window id; it has its own set of event callbacks; you can render to it; you are notified of its creation; ...

子窗口位于其他窗口(可能是顶层窗口，可能还有另一个子窗口)内.因此，它通常仅与您自己创建的其他窗口交互，因此不受窗口管理器的影响.这是与顶级窗口不同的主要来源:

A subwindow lives inside of some other window (possibly a top-level window, possibly another subwindow). Because of this, it generally only interacts with other windows of your own creation, hence it is not subjected to a window manager. This is the primary source for its differences from a top-level window:

因此，我假设流行的工具箱中的GL小部件实际上也充当了一个单独的(子)窗口.有趣的是，这对窗口管理器和用户都是透明的.

So I assume that GL widgets in popular toolkits also act in fact as a distinct (sub)window. The interesting part is that this is transparent to the window manager, and therefore the user.

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