FDynamicRHI::RHIMapStagingSurface

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API > API/Runtime > API/Runtime/RHI > API/Runtime/RHI/FDynamicRHI

Description

Implemented by the platform to read directly from the texture. Useful for getting the last back buffer content after a crash. As the RHIReadSurfaceData implementation will copy the texture's content to a new temporary buffer, that won't work for an unknown crash state. Watch out for OutData to be 0 (can happen on DXGI_ERROR_DEVICE_REMOVED), don't call RHIUnmapStagingSurface in that case.

void RHIMapStagingSurface  
(  
    FRHITexture * Texture,  
    FRHIGPUFence * Fence,  
    void *& OutData,  
    int32 & OutWidth,  
    int32 & OutHeight,  
    uint32 GPUIndex  
)  
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