Implemented loading shaders from file.

assets/shaders/hlsl/green.ps

@@ -0,0 +1,12 @@
+
+struct PS_OUTPUT
+{
+    float4 color : COLOR0;
+};
+
+PS_OUTPUT main() : SV_TARGET
+{
+    PS_OUTPUT output;
+    output.color = float4(0.0, 1.0, 0.0, 1.0);
+    return output;
+}

assets/shaders/hlsl/triangle.vs

@@ -0,0 +1,19 @@
+
+struct VS_OUTPUT
+{
+    float4 vPosition : POSITION;
+};
+
+static const float2 vertices[3] =
+{
+    float2(-0.5, 0.5),
+    float2( 0.5, 0.5),
+    float2( 0.0, -0.5)
+};
+
+VS_OUTPUT main(uint vertexID : SV_VertexID)
+{
+    VS_OUTPUT output;
+    output.vPosition = float4(vertices[vertexID], 0.0, 1.0);
+    return output;
+}