Method DownscaleDepth

Source/Engine/Renderer/Utils/MultiScaler.cpp:215–249

}

void MultiScaler::DownscaleDepth(GPUContext* context, int32 dstWidth, int32 dstHeight, GPUTexture* src, GPUTextureView* dst)
{
    PROFILE_GPU_CPU("Downscale Depth");
    bool outputDepth = ((GPUTexture*)dst->GetParent())->IsDepthStencil();
    if (checkIfSkipPass())
    {
        if (outputDepth)
            context->ClearDepth(dst);
        else
            context->Clear(dst, Color::Transparent);
        return;
    }

    // Prepare
    Data data;
    data.TexelSize.X = 1.0f / (float)src->Width();
    data.TexelSize.Y = 1.0f / (float)src->Height();
    auto cb = _shader->GetShader()->GetCB(0);
    context->UpdateCB(cb, &data);
    context->BindCB(0, cb);

    // Draw
    context->SetViewportAndScissors((float)dstWidth, (float)dstHeight);
    if (outputDepth)
        context->SetRenderTarget(dst, (GPUTextureView*)nullptr);
    else
        context->SetRenderTarget(dst);
    context->BindSR(0, src);
    context->SetState(_psHalfDepth[outputDepth ? 1 : 0]);
    context->DrawFullscreenTriangle();

    // Cleanup
    context->ResetRenderTarget();
    context->UnBindCB(0);
}

void MultiScaler::BuildHiZ(GPUContext* context, GPUTexture* srcDepth, GPUTexture* dstHiZ)
{