osgViewer.GraphicsHandleX11

osgViewer.GraphicsHandleX11类封装了一个基于X11的窗口，用于将OpenSceneGraph渲染结果展示到屏幕上。

构造函数

GraphicsHandleX11(unsigned int width, unsigned int height, int screenNum = 0, Window parent = 0, bool createOwnWindow = true);

• width: 窗口宽度
• height: 窗口高度
• screenNum: 屏幕编号，默认为0
• parent: 父窗口句柄，默认为0，表示无父窗口
• createOwnWindow: 是否创建X11窗口，默认为true

方法

getWindowHandle()

获取X11窗口句柄。

Window getWindowHandle() const;

resized(width, height)

更改窗口大小。

void resized(unsigned int width, unsigned int height);

• width: 新的窗口宽度
• height: 新的窗口高度

makeCurrent()

将OpenGL渲染上下文设置为当前上下文。

void makeCurrent() const;

swapBuffers()

交换前后缓冲，显示渲染结果。

void swapBuffers() const;

示例

#include <osgViewer/GraphicsHandleX11>
#include <osgViewer/Viewer>

osg::ref_ptr<osgViewer::GraphicsHandleX11> createWindow(int width, int height)
{
    osg::ref_ptr<osgViewer::GraphicsHandleX11> graphicsHandle = new osgViewer::GraphicsHandleX11(width, height);
    if (!graphicsHandle.valid())
    {
        osg::notify(osg::FATAL) << "Failed to create graphics window" << std::endl;
        return nullptr;
    }
    return graphicsHandle;
}

int main(int argc, char** argv)
{
    int width = 800;
    int height = 600;

    // 创建X11窗口
    auto graphicsHandle = createWindow(width, height);
    if (!graphicsHandle.valid())
        return 1;

    // 创建OSG查看器
    osgViewer::Viewer viewer;
    viewer.getCamera()->setGraphicsContext(graphicsHandle);

    // 加载模型
    osg::ref_ptr<osg::Node> model = osgDB::readNodeFile("cow.osg");
    if (!model.valid())
    {
        osg::notify(osg::FATAL) << "Failed to load model" << std::endl;
        return 1;
    }
    viewer.setSceneData(model);

    // 渲染循环
    while (!viewer.done())
    {
        viewer.frame();
    }

    return 0;
}