Add GammaColorSpace to Graphics for simplicity

Source/Engine/Graphics/Graphics.cpp

@@ -27,6 +27,7 @@ Quality Graphics::GlobalSDFQuality = Quality::High;
 Quality Graphics::GIQuality = Quality::High;
 bool Graphics::GICascadesBlending = false;
 PostProcessSettings Graphics::PostProcessSettings;
+bool Graphics::GammaColorSpace = true;
 bool Graphics::SpreadWorkload = true;
 bool Graphics::PostProcessing::ColorGradingVolumeLUT = true;
 
@@ -73,6 +74,7 @@ void GraphicsSettings::Apply()
     Graphics::GICascadesBlending = GICascadesBlending;
     Graphics::PostProcessSettings = ::PostProcessSettings();
     Graphics::PostProcessSettings.BlendWith(PostProcessSettings, 1.0f);
+    Graphics::GammaColorSpace = GammaColorSpace;
 #if !USE_EDITOR // OptionsModule handles fallback fonts in Editor
     Font::FallbackFonts = FallbackFonts;
 #endif

Source/Engine/Graphics/Graphics.h

@@ -78,6 +78,12 @@ public:
     /// </summary>
     API_FIELD() static PostProcessSettings PostProcessSettings;
 
+    /// <summary>
+    /// Enables Gamma color space workflow (instead of Linear). Gamma color space defines colors with an applied a gamma curve (sRGB) so they are perceptually linear.
+    /// This makes sense when the output of the rendering represent final color values that will be presented to a non-HDR screen.
+    /// </summary>
+    API_FIELD(ReadOnly) static bool GammaColorSpace;
+
 public:
     /// <summary>
     /// Debug utility to toggle graphics workloads amortization over several frames by systems such as shadows mapping, global illumination or surface atlas. Can be used to test performance in the worst-case scenario (eg. camera-cut).