Method Init

Source/Engine/Graphics/RenderBuffers.cpp:215–268

}

bool RenderBuffers::Init(int32 width, int32 height)
{
    // Skip if resolution won't change
    if ((width == _width && height == _height) || _useNull)
        return false;
    CHECK_RETURN(width > 0 && height > 0, true);

    bool result = false;

    // Depth Buffer
    auto desc = GPUTextureDescription::New2D(width, height, GPU_DEPTH_BUFFER_PIXEL_FORMAT, GPUTextureFlags::ShaderResource | GPUTextureFlags::DepthStencil);
    if (!EnumHasAllFlags(GPUDevice::Instance->GetFormatFeatures(desc.Format).Support, FormatSupport::DepthStencil | FormatSupport::Texture2D))
        desc.Format = desc.Format == PixelFormat::D24_UNorm_S8_UInt ? PixelFormat::D32_Float_S8X24_UInt : PixelFormat::D32_Float;
    if (GPUDevice::Instance->Limits.HasReadOnlyDepth)
        desc.Flags |= GPUTextureFlags::ReadOnlyDepthView;
    
    result |= DepthBuffer->Init(desc);

    // MotionBlurPass initializes MotionVectors texture if needed (lazy init - not every game needs it)
    MotionVectors->ReleaseGPU();

    // GBuffer 0
    desc.Flags = GPUTextureFlags::ShaderResource | GPUTextureFlags::RenderTarget;
    desc.Format = GBUFFER0_FORMAT;
    desc.DefaultClearColor = Color::Transparent;
    result |= GBuffer0->Init(desc);

    // GBuffer 1
    desc.Format = GBUFFER1_FORMAT;
    desc.DefaultClearColor = Color::Transparent;
    result |= GBuffer1->Init(desc);

    // GBuffer 2
    desc.Format = GBUFFER2_FORMAT;
    desc.DefaultClearColor = Color(1, 0, 0, 0);
    result |= GBuffer2->Init(desc);

    // GBuffer 3
    desc.Format = GBUFFER3_FORMAT;
    desc.DefaultClearColor = Color::Transparent;
    result |= GBuffer3->Init(desc);

    // Cache data
    _width = width;
    _height = height;
    _aspectRatio = static_cast<float>(width) / height;
    _viewport = Viewport(0, 0, static_cast<float>(width), static_cast<float>(height));
    LastEyeAdaptationTime = 0;

    // Flush any pool render targets to prevent over-allocating GPU memory when resizing game viewport
    RenderTargetPool::Flush(false, 4);

    return result;
}

void RenderBuffers::Release()
{