Extract standalone Playground SDK source foundation

third_party/SDL3_ttf/examples/testgputext/shaders/shader.frag.hlsl

@@ -0,0 +1,17 @@
+Texture2D<float4> tex : register(t0, space2);
+SamplerState samp : register(s0, space2);
+
+struct PSInput {
+    float4 color : TEXCOORD0;
+    float2 tex_coord : TEXCOORD1;
+};
+
+struct PSOutput {
+    float4 color : SV_Target;
+};
+
+PSOutput main(PSInput input) {
+    PSOutput output;
+    output.color = input.color * tex.Sample(samp, input.tex_coord);
+    return output;
+}