Fixes and tweaks for rendering

Source/Engine/Graphics/GPUContext.h

@@ -553,7 +553,7 @@ public:
     /// <summary>
     /// Sets the rendering viewport and scissor rectangle.
     /// </summary>
-    /// <param name="viewport">The viewport.</param>
+    /// <param name="viewport">The viewport (in pixels).</param>
     API_FUNCTION() FORCE_INLINE void SetViewportAndScissors(const Viewport& viewport)
     {
         SetViewport(viewport);
@@ -575,13 +575,13 @@ public:
     /// <summary>
     /// Sets the rendering viewport.
     /// </summary>
-    /// <param name="viewport">The viewport.</param>
+    /// <param name="viewport">The viewport (in pixels).</param>
     API_FUNCTION() virtual void SetViewport(API_PARAM(Ref) const Viewport& viewport) = 0;
 
     /// <summary>
     /// Sets the scissor rectangle.
     /// </summary>
-    /// <param name="scissorRect">The scissor rectangle.</param>
+    /// <param name="scissorRect">The scissor rectangle (in pixels).</param>
     API_FUNCTION() virtual void SetScissor(API_PARAM(Ref) const Rectangle& scissorRect) = 0;
 
 public:

Source/Engine/Graphics/RenderBuffers.h

@@ -16,6 +16,9 @@
 #define GBUFFER2_FORMAT PixelFormat::R8G8B8A8_UNorm
 #define GBUFFER3_FORMAT PixelFormat::R8G8B8A8_UNorm
 
+// Light accumulation buffer format (direct+indirect light, materials emissive)
+#define LIGHT_BUFFER_FORMAT PixelFormat::R11G11B10_Float
+
 /// <summary>
 /// The scene rendering buffers container.
 /// </summary>

Source/Engine/Renderer/GlobalSignDistanceFieldPass.cpp

@@ -135,12 +135,15 @@ bool GlobalSignDistanceFieldPass::Init()
     // Check platform support
     const auto device = GPUDevice::Instance;
     _supported = device->GetFeatureLevel() >= FeatureLevel::SM5 && device->Limits.HasCompute && device->Limits.HasTypedUAVLoad
-            && FORMAT_FEATURES_ARE_NOT_SUPPORTED(device->GetFormatFeatures(GLOBAL_SDF_FORMAT).Support, FormatSupport::ShaderSample | FormatSupport::Texture3D);
+            && FORMAT_FEATURES_ARE_SUPPORTED(device->GetFormatFeatures(GLOBAL_SDF_FORMAT).Support, FormatSupport::ShaderSample | FormatSupport::Texture3D);
     return false;
 }
 
 bool GlobalSignDistanceFieldPass::setupResources()
 {
+    if (!_supported)
+        return true;
+
     // Load shader
     if (!_shader)
     {
@@ -239,7 +242,7 @@ bool GlobalSignDistanceFieldPass::Render(RenderContext& renderContext, GPUContex
         result = sdfData.Result;
         return false;
     }
-
+    sdfData.LastFrameUsed = currentFrame;
     PROFILE_GPU_CPU("Global SDF");
 
     // TODO: configurable via graphics settings
@@ -251,7 +254,6 @@ bool GlobalSignDistanceFieldPass::Render(RenderContext& renderContext, GPUContex
     const float cascadesDistances[] = { distanceExtent, distanceExtent * 2.0f, distanceExtent * 4.0f, distanceExtent * 8.0f };
 
     // Initialize buffers
-    sdfData.LastFrameUsed = currentFrame;
     auto desc = GPUTextureDescription::New3D(resolution, resolution, resolution, GLOBAL_SDF_FORMAT, GPUTextureFlags::ShaderResource | GPUTextureFlags::UnorderedAccess, 1);
     bool updated = false;
     for (GPUTexture*& cascade : sdfData.Cascades)

Source/Engine/Renderer/GlobalSignDistanceFieldPass.h

@@ -72,6 +72,7 @@ public:
     /// <param name="output">The output buffer.</param>
     void RenderDebug(RenderContext& renderContext, GPUContext* context, GPUTexture* output);
 
+    // Rasterize Model SDF into the Global SDF. Call it from actor Draw() method during DrawPass::GlobalSDF.
     void RasterizeModelSDF(const ModelBase::SDFData& sdf, const Matrix& localToWorld, const BoundingBox& objectBounds);
 
 private:

Source/Engine/Renderer/Renderer.cpp

@@ -326,7 +326,7 @@ void RenderInner(SceneRenderTask* task, RenderContext& renderContext)
     renderContext.List->SortDrawCalls(renderContext, false, DrawCallsListType::Distortion);
 
     // Get the light accumulation buffer
-    auto tempDesc = GPUTextureDescription::New2D(renderContext.Buffers->GetWidth(), renderContext.Buffers->GetHeight(), PixelFormat::R11G11B10_Float);
+    auto tempDesc = GPUTextureDescription::New2D(renderContext.Buffers->GetWidth(), renderContext.Buffers->GetHeight(), LIGHT_BUFFER_FORMAT);
     auto lightBuffer = RenderTargetPool::Get(tempDesc);
 
 #if USE_EDITOR