如何在D3D窗口化应用中启用VSYNC? [英] How to enable VSYNC in D3D windowed app?

问题描述

因此，我在窗口应用程序中使用了D3D.

So, Im using D3D in a windowed application.

我使用以下参数初始化了D3D:

I inited D3D with the following parameters:

windowed: true;
backbufferformat: D3DFMT_X8R8G8B8;
presentinterval: D3DPRESENT_INTERVAL_ONE;
swapeffect: DISCARD

每次调用OnPaint时，我都会将图像渲染到后缓冲中，并呈现在前面.

Each time OnPaint is called, I render the image to the backbuffer and present it to front.

据我所知(MSDN也说)，一旦我设置了D3DPRESENT_INTERVAL_ONE，vsync就可以工作.

As far as I know (and so does MSDN say), once I set D3DPRESENT_INTERVAL_ONE, vsync will work.

但是在这种情况下，水平拖动时图像会撕裂.

But in this case, the image is teared when dragging horizontally.

(图像上似乎有一条线，该线下方的图像显示在监视器上，随后是上面的部分.)

(It seems there's a line across the image, image below the line shows on the monitor and the above part follows.)

某些网站说D3DPRESENT_INTERVAL_ONE在窗口应用程序中将无法使用.

Some sites say D3DPRESENT_INTERVAL_ONE will not work in windowed applications.

我该如何启用vsync?

How can I enable vsync anyway?

p.s.我终于发现启用了D3D vsync，而某些窗口设置不正确，可能是窗口本身未同步.但是，我还没有偷看设置.

p.s. I finally found D3D vsync is enabled, while some window settings are not right that perhaps the window itself is not sync ed. though, I haven't peek the settings out.

推荐答案

我假设您正在使用D3D9?应该添加该标签.在您的D3DPRESENT_PARAMS变量上:

I assume you're using D3D9? Should add that tag. On your D3DPRESENT_PARAMS variable:

if (bVysncEnabled)
{
    presentParams.PresentationInterval = D3DPRESENT_INTERVAL_ONE;
    presentParams.FullScreen_RefreshRateInHz = D3DPRESENT_RATE_DEFAULT;
}
else
{
    presentParams.PresentationInterval = D3DPRESENT_INTERVAL_IMMEDIATE;
    presentParams.FullScreen_RefreshRateInHz = 0;
}

如果您已完成此操作，并且使用的是旧版GDI，则错误的不是vsync设置，而是窗口设置.您必须启用双重缓冲，否则仍然会撕裂.

If you've done this and you're using the old GDI stuff, it's not your vsync setting that's wrong, but the window settings. You must enable double buffering or you'll still get tearing.

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