From 8ab740fa2e4f5f7b2ad09bfca6cc2e8fa3e520f1 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Simon=20L=C3=BCbe=C3=9F?= <simon.luebess@gmail.com>
Date: Wed, 25 Aug 2021 22:27:04 +0200
Subject: [PATCH] Added basic support for arrays in BufferVariables

---
 .../Platform/DX11/Renderer/Dx11ConstantBuffer.bf   |  1 +
 GlitchyEngine/src/Renderer/BufferVariable.bf       | 14 +++++++++++++-
 2 files changed, 14 insertions(+), 1 deletion(-)

diff --git a/GlitchyEngine/src/Platform/DX11/Renderer/Dx11ConstantBuffer.bf b/GlitchyEngine/src/Platform/DX11/Renderer/Dx11ConstantBuffer.bf
index 7984ab5..e9a196f 100644
--- a/GlitchyEngine/src/Platform/DX11/Renderer/Dx11ConstantBuffer.bf
+++ b/GlitchyEngine/src/Platform/DX11/Renderer/Dx11ConstantBuffer.bf
@@ -37,6 +37,7 @@ namespace GlitchyEngine.Renderer
 
 			_columns = shaderTypeDescription.Columns;
 			_rows = shaderTypeDescription.Rows;
+			_elements = shaderTypeDescription.Elements;
 
 			SetRawData(variableDescription.DefaultValue);
 		}
diff --git a/GlitchyEngine/src/Renderer/BufferVariable.bf b/GlitchyEngine/src/Renderer/BufferVariable.bf
index e3e7199..5734099 100644
--- a/GlitchyEngine/src/Renderer/BufferVariable.bf
+++ b/GlitchyEngine/src/Renderer/BufferVariable.bf
@@ -16,6 +16,8 @@ namespace GlitchyEngine.Renderer
 		internal uint32 _rows;
 		private uint32 _offset;
 		internal uint32 _sizeInBytes;
+		// Number of elements in the array
+		internal uint32 _elements;
 
 		private bool _isUsed;
 
@@ -33,7 +35,7 @@ namespace GlitchyEngine.Renderer
 		[Inline]
 		internal uint8* firstByte => _constantBuffer.rawData.CArray() + _offset;
 
-		public this(ConstantBuffer constantBuffer, ShaderVariableType type, uint32 columns, uint32 rows, uint32 offset, uint32 sizeInBytes, bool isUsed)
+		public this(ConstantBuffer constantBuffer, ShaderVariableType type, uint32 columns, uint32 rows, uint32 offset, uint32 sizeInBytes, uint32 elements, bool isUsed)
 		{
 			_constantBuffer = constantBuffer..AddRef();
 			_type = type;
@@ -41,6 +43,7 @@ namespace GlitchyEngine.Renderer
 			_rows = rows;
 			_offset = offset;
 			_sizeInBytes = sizeInBytes;
+			_elements = elements;
 			_isUsed = isUsed;
 		}
 
@@ -151,6 +154,15 @@ namespace GlitchyEngine.Renderer
 
 			*(Matrix*)firstByte = value;
 		}
+
+		public void SetData(Matrix[] value)
+		{
+			EnsureTypeMatch(4, 4, .Float);
+
+			// TODO: assert length
+
+			Internal.MemCpy(firstByte, value.Ptr, sizeof(Matrix) * Math.Min(value.Count, _elements));
+		}
 		
 		public void SetData(ColorRGB value)
 		{