Add "View Size" node for GUI materials

Content/Editor/MaterialTemplates/GUI.shader

@@ -19,6 +19,7 @@ float3 ViewDir;
 float TimeParam;
 float4 ViewInfo;
 float4 ScreenSize;
+float4 ViewSize;
 @1META_CB_END
 
 // Shader resources

Source/Editor/Surface/Archetypes/Material.cs

@@ -863,6 +863,19 @@ namespace FlaxEditor.Surface.Archetypes
                     NodeElementArchetype.Factory.TextBox(0, 40, 300, 200, 0),
                 }
             },
+            new NodeArchetype
+            {
+                TypeID = 39,
+                Title = "View Size",
+                Description = "The size of the view.",
+                Flags = NodeFlags.MaterialGraph,
+                Size = new Float2(150, 40),
+                Elements = new[]
+                {
+                    NodeElementArchetype.Factory.Output(0, "Size", typeof(Float2), 0),
+                    NodeElementArchetype.Factory.Output(1, "Inv Size", typeof(Float2), 1),
+                }
+            },
         };
     }
 }

Source/Engine/Graphics/Materials/GUIMaterialShader.cpp

@@ -20,6 +20,7 @@ PACK_STRUCT(struct GUIMaterialShaderData {
     float TimeParam;
     Float4 ViewInfo;
     Float4 ScreenSize;
+    Float4 ViewSize;
     });
 
 void GUIMaterialShader::Bind(BindParameters& params)
@@ -32,6 +33,7 @@ void GUIMaterialShader::Bind(BindParameters& params)
     cb = Span<byte>(cb.Get() + sizeof(GUIMaterialShaderData), cb.Length() - sizeof(GUIMaterialShaderData));
     int32 srv = 0;
     const auto ps = context->IsDepthBufferBinded() ? _cache.Depth : _cache.NoDepth;
+    auto customData = (Render2D::CustomData*)params.CustomData;
 
     // Setup parameters
     MaterialParameter::BindMeta bindMeta;
@@ -45,8 +47,8 @@ void GUIMaterialShader::Bind(BindParameters& params)
 
     // Setup material constants
     {
-        const auto viewProjectionMatrix = (Matrix*)params.CustomData;
-        Matrix::Transpose(*viewProjectionMatrix, materialData->ViewProjectionMatrix);
+        const auto viewProjectionMatrix = customData->ViewProjection;
+        Matrix::Transpose(viewProjectionMatrix, materialData->ViewProjectionMatrix);
         Matrix::Transpose(Matrix::Identity, materialData->WorldMatrix);
         Matrix::Transpose(Matrix::Identity, materialData->ViewMatrix);
         materialData->ViewPos = Float3::Zero;
@@ -56,6 +58,7 @@ void GUIMaterialShader::Bind(BindParameters& params)
         materialData->ViewInfo = Float4::Zero;
         auto& viewport = Render2D::GetViewport();
         materialData->ScreenSize = Float4(viewport.Width, viewport.Height, 1.0f / viewport.Width, 1.0f / viewport.Height);
+        materialData->ViewSize = Float4(customData->ViewSize.X, customData->ViewSize.Y, 1.0f / customData->ViewSize.X, 1.0f / customData->ViewSize.Y);
     }
 
     // Bind constants

Source/Engine/Render2D/Render2D.cpp

@@ -114,6 +114,8 @@ struct Render2DDrawCall
         struct
         {
             MaterialBase* Mat;
+            float Width;
+            float Height;
         } AsMaterial;
 
         struct
@@ -984,7 +986,10 @@ void DrawBatch(int32 startIndex, int32 count)
         // Apply and bind material
         auto material = d.AsChar.Mat;
         MaterialBase::BindParameters bindParams(Context, *(RenderContext*)nullptr);
-        bindParams.CustomData = &ViewProjection;
+        Render2D::CustomData customData;
+        customData.ViewProjection = ViewProjection;
+        customData.ViewSize = Float2(d.AsMaterial.Width, d.AsMaterial.Height);
+        bindParams.CustomData = &customData;
         material->Bind(bindParams);
 
         // Bind font atlas as a material parameter
@@ -1017,7 +1022,10 @@ void DrawBatch(int32 startIndex, int32 count)
         // Bind material
         auto material = (MaterialBase*)d.AsMaterial.Mat;
         MaterialBase::BindParameters bindParams(Context, *(RenderContext*)nullptr);
-        bindParams.CustomData = &ViewProjection;
+        Render2D::CustomData customData;
+        customData.ViewProjection = ViewProjection;
+        customData.ViewSize = Float2(d.AsMaterial.Width, d.AsMaterial.Height);
+        bindParams.CustomData = &customData;
         material->Bind(bindParams);
 
         // Bind index and vertex buffers
@@ -1892,6 +1900,8 @@ void Render2D::DrawMaterial(MaterialBase* material, const Rectangle& rect, const
     drawCall.StartIB = IBIndex;
     drawCall.CountIB = 6;
     drawCall.AsMaterial.Mat = material;
+    drawCall.AsMaterial.Width = rect.GetWidth();
+    drawCall.AsMaterial.Height = rect.GetHeight();
     WriteRect(rect, color);
 }
 

Source/Engine/Render2D/Render2D.h

@@ -5,6 +5,8 @@
 #include "Engine/Core/Math/Color.h"
 #include "Engine/Scripting/ScriptingType.h"
 #include "Engine/Core/Types/Span.h"
+#include "Engine/Core/Math/Vector2.h"
+#include "Engine/Core/Math/Matrix.h"
 
 struct SpriteHandle;
 struct TextLayoutOptions;
@@ -44,6 +46,13 @@ DECLARE_SCRIPTING_TYPE_NO_SPAWN(Render2D);
         VertexSnapping = 1,
     };
 
+public:
+    struct CustomData
+    {
+        Matrix ViewProjection;
+        Float2 ViewSize;
+    };
+
 public:
 
     /// <summary>

Source/Engine/Tools/MaterialGenerator/MaterialGenerator.Material.cpp

@@ -480,6 +480,16 @@ void MaterialGenerator::ProcessGroupMaterial(Box* box, Node* node, Value& value)
         value = writeLocal(ValueType::Float3, String::Format(TEXT("float3({0}.x * 360.0f, {0}.y / ({0}.z + {1}), {0}.z)"), hcv.Value, epsilon.Value), node);
         break;
     }
+    // View Size
+    case 39:
+    {
+        const auto layer = GetRootLayer();
+        if (layer && layer->Domain == MaterialDomain::GUI)
+        {
+            value = Value(VariantType::Float2, box->ID == 0 ? TEXT("ViewSize.xy") : TEXT("ViewSize.zw"));
+        }
+        break;
+    }
     default:
         break;
     }