data/shaders: Displacement filter example

data/shaders/filter/example_displace_by_texture.effect

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+// Always provided by OBS
+uniform float4x4 ViewProj<
+	bool visible = false;
+	string name = "View Projection Matrix";
+>;
+
+// Provided by Stream Effects
+uniform float4 Time<
+	bool visible = false;
+	string name = "Time Array";
+	string description = "A float4 value containing the total time, rendering time and the time since the last tick. The last value is a random number between 0 and 1.";
+>;
+uniform float4x4 Random<
+	bool visible = false;
+	string name = "Random Array";
+	string description = "A float4x4 value containing random values between 0 and 1";
+>;
+uniform texture2d ImageSource<
+	bool visible = false;
+	string name = "Source Texture (Filter, Transition)";
+>;
+uniform float2 ImageSource_Size<
+	bool visible = false;
+	string name = "Source Texture Size (Filter, Transition)";
+>;
+uniform float2 ImageSource_Texel<
+	bool visible = false;
+	string name = "Source Texture Texel Size (Filter, Transition)";
+>;
+
+// Shader Parameters
+uniform texture2d p_texture <
+	bool visible = true;
+	string name = "Displacement Map";
+>;
+uniform float p_scale <
+	bool visible = true;
+	string name = "Displacement Scale";
+	float minimum = 0.0;
+	float maximum = 100.0;
+	float step = 0.01;
+> = 1.0;
+
+// ---------- Shader Code
+sampler_state def_sampler {
+	AddressU  = Wrap;
+	AddressV  = Wrap;
+	Filter    = Linear;
+};
+
+struct VertData {
+	float4 pos : POSITION;
+	float2 uv  : TEXCOORD0;
+};
+
+struct FragData {
+	float4 pos : POSITION;
+	float2 uv  : TEXCOORD0;
+};
+
+FragData VSDefault(VertData v_in) {
+	FragData vert_out;
+	vert_out.pos = mul(float4(v_in.pos.xyz, 1.0), ViewProj);
+	vert_out.uv  = v_in.uv;
+	return vert_out;
+}
+
+// ---------- Pass Through
+float4 PS_Draw(FragData v_in) : TARGET {
+	float4 disp = p_texture.Sample(def_sampler, v_in.uv);
+	
+	float2 uv_off = (disp.xy - 0.5) * p_scale;
+	
+	return ImageSource.Sample(def_sampler, v_in.uv + uv_off);
+}
+
+technique Draw
+{
+	pass
+	{
+		vertex_shader = VSDefault(v_in);
+		pixel_shader  = PS_Draw(v_in);
+	}
+}