Know of a vector drawing lib to be used as an overlay for a program?

<p>I would like to create an overlay for one of my video games that I play. I&#39;ve searched around a bit and can&#39;t find a repo that would allow me to draw vectors every 16 milliseconds (60fps) without taking a big performance hit.</p> <p>Do any of you gophers know of a repo that will let me draw ontop of a window without taking a big munch out of performance?</p> <p>Maybe something similar to GDI. I figure there&#39;s something out there that lets me draw vectors in realtime and I can just make the window background transparent.</p> <hr/>**评论：**<br/><br/>emdeka87: <pre><p>You need to hook the draw calls of the target process and inject your own drawing code. <a href="https://stackoverflow.com/questions/11810854/opengl-directx-hook-similar-to-fraps" rel="nofollow">https://stackoverflow.com/questions/11810854/opengl-directx-hook-similar-to-fraps</a></p> <p>On windows this should be fairly simple using the right WinApi calls. You can draw the vector using DirectX (or the hooked API).</p> <p>I assume go has bindings for these APIs</p></pre>69beards: <pre><p>perfect, didn&#39;t think about that. I found <a href="https://github.com/gonutz/d3d9" rel="nofollow">https://github.com/gonutz/d3d9</a>. thanks.</p></pre>