convenience constructors for graphics state

src/Graphics/RefreshStructs.cs

@@ -113,6 +113,17 @@ namespace MoonWorks.Graphics
 		public uint Binding;
 		public uint Stride;
 		public VertexInputRate InputRate;
+
+		// Shortcut for the common case of having a single vertex binding.
+		public static VertexBinding Create<T>()
+		{
+			return new VertexBinding
+			{
+				Binding = 0,
+				InputRate = VertexInputRate.Vertex,
+				Stride = (uint) Marshal.SizeOf<T>()
+			};
+		}
 	}
 
 	[StructLayout(LayoutKind.Sequential)]
@@ -122,6 +133,28 @@ namespace MoonWorks.Graphics
 		public uint Binding;
 		public VertexElementFormat Format;
 		public uint Offset;
+
+		public static VertexAttribute Create<T>(
+			string fieldName,
+			uint location,
+			uint binding = 0
+		)
+		{
+			var fieldInfo = typeof(T).GetField(fieldName);
+
+			if (fieldInfo == null)
+			{
+				throw new System.ArgumentException("Field not recognized!");
+			}
+
+			return new VertexAttribute
+			{
+				Binding = binding,
+				Location = location,
+				Format = Conversions.TypeToVertexElementFormat(fieldInfo.FieldType),
+				Offset = (uint) Marshal.OffsetOf<T>(fieldName)
+			};
+		}
 	}
 
 	[StructLayout(LayoutKind.Sequential)]
@@ -175,7 +208,7 @@ namespace MoonWorks.Graphics
 			StoreOp = storeOp;
 		}
 
-		public ColorAttachmentInfo(Texture texture, StoreOp storeOp = StoreOp.Store)
+		public ColorAttachmentInfo(Texture texture, LoadOp loadOp = LoadOp.DontCare, StoreOp storeOp = StoreOp.Store)
 		{
 			Texture = texture;
 			Depth = 0;
@@ -183,8 +216,8 @@ namespace MoonWorks.Graphics
 			Level = 0;
 			SampleCount = SampleCount.One;
 			ClearColor = Color.White;
-			LoadOp = LoadOp.DontCare;
-			StoreOp = StoreOp.Store;
+			LoadOp = loadOp;
+			StoreOp = storeOp;
 		}
 
 		public Refresh.ColorAttachmentInfo ToRefresh()
@@ -258,5 +291,15 @@ namespace MoonWorks.Graphics
 		public TextureFormat Format;
 		public SampleCount SampleCount;
 		public ColorAttachmentBlendState BlendState;
+
+		public ColorAttachmentDescription(
+			TextureFormat format,
+			ColorAttachmentBlendState blendState,
+			SampleCount sampleCount = SampleCount.One
+		) {
+			Format = format;
+			SampleCount = sampleCount;
+			BlendState = blendState;
+		}
 	}
 }

src/Graphics/Resources/ComputePipeline.cs

@@ -20,8 +20,8 @@ namespace MoonWorks.Graphics
 				entryPointName = computeShaderInfo.EntryPointName,
 				shaderModule = computeShaderInfo.ShaderModule.Handle,
 				uniformBufferSize = computeShaderInfo.UniformBufferSize,
-				bufferBindingCount = computeShaderInfo.bufferBindingCount,
-				imageBindingCount = computeShaderInfo.imageBindingCount
+				bufferBindingCount = computeShaderInfo.BufferBindingCount,
+				imageBindingCount = computeShaderInfo.ImageBindingCount
 			};
 
 			Handle = Refresh.Refresh_CreateComputePipeline(

src/Graphics/State/ComputeShaderInfo.cs

@@ -1,3 +1,5 @@
+using System.Runtime.InteropServices;
+
 namespace MoonWorks.Graphics
 {
 	/// <summary>
@@ -8,7 +10,41 @@ namespace MoonWorks.Graphics
 		public ShaderModule ShaderModule;
 		public string EntryPointName;
 		public uint UniformBufferSize;
-		public uint bufferBindingCount;
-		public uint imageBindingCount;
+		public uint BufferBindingCount;
+		public uint ImageBindingCount;
+
+		public static ComputeShaderInfo Create<T>(
+			ShaderModule shaderModule,
+			string entryPointName,
+			uint bufferBindingCount,
+			uint imageBindingCount
+		)
+		{
+			return new ComputeShaderInfo
+			{
+				ShaderModule = shaderModule,
+				EntryPointName = entryPointName,
+				UniformBufferSize = (uint) Marshal.SizeOf<T>(),
+				BufferBindingCount = bufferBindingCount,
+				ImageBindingCount = imageBindingCount
+			};
+		}
+
+        public static ComputeShaderInfo Create(
+            ShaderModule shaderModule,
+            string entryPointName,
+            uint bufferBindingCount,
+            uint imageBindingCount
+        )
+        {
+            return new ComputeShaderInfo
+			{
+				ShaderModule = shaderModule,
+				EntryPointName = entryPointName,
+				UniformBufferSize = 0,
+				BufferBindingCount = bufferBindingCount,
+				ImageBindingCount = imageBindingCount
+			};
+        }
 	}
 }

src/Graphics/State/GraphicsPipelineAttachmentInfo.cs

@@ -8,5 +8,22 @@ namespace MoonWorks.Graphics
 		public ColorAttachmentDescription[] ColorAttachmentDescriptions;
 		public bool HasDepthStencilAttachment;
 		public TextureFormat DepthStencilFormat;
+
+		public GraphicsPipelineAttachmentInfo(
+			params ColorAttachmentDescription[] colorAttachmentDescriptions
+		) {
+			ColorAttachmentDescriptions = colorAttachmentDescriptions;
+			HasDepthStencilAttachment = false;
+			DepthStencilFormat = TextureFormat.D16;
+		}
+
+		public GraphicsPipelineAttachmentInfo(
+			TextureFormat depthStencilFormat,
+			params ColorAttachmentDescription[] colorAttachmentDescriptions
+		) {
+			ColorAttachmentDescriptions = colorAttachmentDescriptions;
+			HasDepthStencilAttachment = true;
+			DepthStencilFormat = depthStencilFormat;
+		}
 	}
 }

src/Graphics/State/GraphicsShaderInfo.cs

@@ -1,4 +1,6 @@
-namespace MoonWorks.Graphics
+using System.Runtime.InteropServices;
+
+namespace MoonWorks.Graphics
 {
 	/// <summary>
 	/// Information that the pipeline needs about a shader.
@@ -9,5 +11,34 @@
 		public string EntryPointName;
 		public uint UniformBufferSize;
 		public uint SamplerBindingCount;
+
+		public static GraphicsShaderInfo Create<T>(
+			ShaderModule shaderModule,
+			string entryPointName,
+			uint samplerBindingCount
+		) where T : unmanaged
+		{
+			return new GraphicsShaderInfo
+			{
+				ShaderModule = shaderModule,
+				EntryPointName = entryPointName,
+				UniformBufferSize = (uint) Marshal.SizeOf<T>(),
+				SamplerBindingCount = samplerBindingCount
+			};
+		}
+
+		public static GraphicsShaderInfo Create(
+			ShaderModule shaderModule,
+			string entryPointName,
+			uint samplerBindingCount
+		) {
+			return new GraphicsShaderInfo
+			{
+				ShaderModule = shaderModule,
+				EntryPointName = entryPointName,
+				UniformBufferSize = 0,
+				SamplerBindingCount = samplerBindingCount
+			};
+		}
 	}
 }

src/Graphics/State/VertexInputState.cs

@@ -7,5 +7,13 @@
 	{
 		public VertexBinding[] VertexBindings;
 		public VertexAttribute[] VertexAttributes;
+
+		public VertexInputState(
+			VertexBinding vertexBinding,
+			params VertexAttribute[] vertexAttributes
+		) {
+			VertexBindings = new VertexBinding[] { vertexBinding };
+			VertexAttributes = vertexAttributes;
+		}
 	}
 }

src/Graphics/Utility/Conversions.cs

@@ -11,5 +11,35 @@
 		{
 			return b != 0;
 		}
+
+		public static Graphics.VertexElementFormat TypeToVertexElementFormat(System.Type type)
+		{
+			if (type == typeof(float))
+			{
+				return Graphics.VertexElementFormat.Single;
+			}
+			else if (type == typeof(Math.Vector2))
+			{
+				return Graphics.VertexElementFormat.Vector2;
+			}
+			else if (type == typeof(Math.Vector3))
+			{
+				return Graphics.VertexElementFormat.Vector3;
+			}
+			else if (type == typeof(Math.Vector4))
+			{
+				return Graphics.VertexElementFormat.Vector4;
+			}
+			else if (type == typeof(Graphics.Color))
+			{
+				return Graphics.VertexElementFormat.Color;
+			}
+			else
+			{
+				throw new System.ArgumentException(
+					"Cannot automatically convert this type to a VertexElementFormat!"
+				);
+			}
+		}
 	}
 }