Squashed 'external/SDL/' content from commit 716c767b7

git-subtree-dir: external/SDL
git-subtree-split: 716c767b7e7099fb0e2fda9db59227a7e1d1d8a4

test/testgpu/cube.frag.hlsl

@@ -0,0 +1,17 @@
+
+struct VSInput
+{
+    float3 Position : TEXCOORD0;
+    float3 Color : TEXCOORD1;
+};
+
+struct VSOutput
+{
+    float4 Color : TEXCOORD0;
+    float4 Position : SV_Position;
+};
+
+float4 main(VSOutput input) : SV_Target0
+{
+    return input.Color;
+}