irrlicht锁纹理和渲染目标

最新推荐文章于 2021-11-28 03:44:02 发布

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最新推荐文章于 2021-11-28 03:44:02 发布

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CC 4.0 BY-SA版权

原文链接：http://www.cnblogs.com/lancidie/archive/2011/03/14/1983809.html

//! lock function
void* CD3D9Texture::lock(bool readOnly, u32 mipmapLevel)
{
    if (!Texture)
        return 0;

    MipLevelLocked=mipmapLevel;
    HRESULT hr;
    D3DLOCKED_RECT rect;
    if(!IsRenderTarget)
    {
        hr = Texture->LockRect(mipmapLevel, &rect, 0, readOnly?D3DLOCK_READONLY:0);
        if (FAILED(hr))
        {
            os::Printer::log("Could not lock DIRECT3D9 Texture.", ELL_ERROR);
            return 0;
        }
    }
    else
    {
        if (!RTTSurface)
        {
            // Make RTT surface large enough for all miplevels (including 0)
            D3DSURFACE_DESC desc;
            Texture->GetLevelDesc(0, &desc);
            hr = Device->CreateOffscreenPlainSurface(desc.Width, desc.Height, desc.Format, D3DPOOL_SYSTEMMEM, &RTTSurface, 0);
            if (FAILED(hr))
            {
                os::Printer::log("Could not lock DIRECT3D9 Texture", "Offscreen surface creation failed.", ELL_ERROR);
                return 0;
            }
        }

        IDirect3DSurface9 *surface = 0;
        hr = Texture->GetSurfaceLevel(mipmapLevel, &surface);
        if (FAILED(hr))
        {
            os::Printer::log("Could not lock DIRECT3D9 Texture", "Could not get surface.", ELL_ERROR);
            return 0;
        }
        hr = Device->GetRenderTargetData(surface, RTTSurface);
        surface->Release();
        if(FAILED(hr))
        {
            os::Printer::log("Could not lock DIRECT3D9 Texture", "Data copy failed.", ELL_ERROR);
            return 0;
        }
        hr = RTTSurface->LockRect(&rect, 0, readOnly?D3DLOCK_READONLY:0);
        if(FAILED(hr))
        {
            os::Printer::log("Could not lock DIRECT3D9 Texture", "LockRect failed.", ELL_ERROR);
            return 0;
        }
    }
    return rect.pBits;
}

转载于:https://www.cnblogs.com/lancidie/archive/2011/03/14/1983809.html