IDirect3DSurface9 :: LockRect [英] IDirect3DSurface9::LockRect

问题描述

为什么IDirect3DSurface9 :: LockRect的运行速度很慢?
我应该使用什么参数使IDirect3DSurface9 :: LockRect快速工作?
由于StretchRect，我使用了渲染目标"曲面.

Why IDirect3DSurface9::LockRect works very slow?
What parameters should i use to make IDirect3DSurface9::LockRect work fast?
I use Render Target surfaces because of StretchRect.

推荐答案

我已经使用DYNAMIC特克斯(D3DUSAGE_DYNAMIC)进行了1次调用.所以我的速度提高了34％.

I have used DYNAMIC texrures (D3DUSAGE_DYNAMIC) for 1 call. So i have got 34 % speed increase.

local_handle_result = direct_3D_device->CreateTexture(
        cxImage,
        cyImage,
        1,
        D3DUSAGE_DYNAMIC,
        D3DFMT_A8R8G8B8,
        D3DPOOL_DEFAULT,
        &local_source_texture,
        NULL);

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