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13.4 DirectX内部劫持绘制

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By DWORD oldProtect, GetCurrent Thread, GetCurrent Process
| dasizhe.cn
相对于外部绘图技术的不稳定性，内部绘制则显得更加流程与稳定，在Dx9环境中，函数EndScene是在绘制3D场景后，用于完成将最终的图像渲染到屏幕的一系列操作的函数。它会将缓冲区中的图像清空，设置视口和其他渲染状态，执行顶点和像素着色器，最后在后台缓冲区中生成一张完整的渲染图像，然后将其呈现到屏幕上，完成一次绘制操作。 而EndScene是IDirect3DDevice9第43个函数，我们通过对该函数进行挂钩，并将该函数绘制之前的流程劫持到自身进程内的MyEndScene函数内做图形的增加工作，当我们增加好所需功能后再将该函数指向原来的函数入口，此时EndScene函数再次渲染则会出现我们所新增的功能，利用这种方式即可实现屏幕图形绘制效果，至于笔者是如何确定该函数是第43个的，读者可以在IDirect3DDevice9上面右键查看定义，至此即可看到函数所在位置；...
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