add NormalsDisplacement shader and preset

reshade/NormalsDisplacement.slangp

@@ -0,0 +1,6 @@
+shaders = 1
+
+shader0 = shaders/NormalsDisplacement/NormalsDisplacement.slang
+
+textures = "displacementMap"
+displacementMap = shaders/NormalsDisplacement/CurveNormals.png

reshade/shaders/NormalsDisplacement/NormalsDisplacement.slang

@@ -0,0 +1,53 @@
+#version 450
+
+layout(push_constant) uniform Push
+{
+	vec4 SourceSize;
+	vec4 OriginalSize;
+	vec4 OutputSize;
+	uint FrameCount;
+	float Displacement;
+} params;
+
+#pragma parameter Displacement "Displacement Factor" 20.0 0.0 60.0 1.0
+
+layout(std140, set = 0, binding = 0) uniform UBO
+{
+	mat4 MVP;
+} global;
+
+#pragma stage vertex
+layout(location = 0) in vec4 Position;
+layout(location = 1) in vec2 TexCoord;
+layout(location = 0) out vec2 vTexCoord;
+
+void main()
+{
+   gl_Position = global.MVP * Position;
+   vTexCoord = TexCoord;
+}
+
+#pragma stage fragment
+layout(location = 0) in vec2 vTexCoord;
+layout(location = 0) out vec4 FragColor;
+layout(set = 0, binding = 2) uniform sampler2D Source;
+layout(set = 0, binding = 3) uniform sampler2D displacementMap;
+
+vec2 DisplacementLevel()
+{
+	return (params.OutputSize.zw*params.Displacement);//Displacement's value is measured in half of a pixel. Don't need to waste resources on multiplying by two.
+}
+
+vec2 CoordDisplacement(vec2 coord)
+{
+	return (coord-((texture(displacementMap, coord).xy-0.5)*DisplacementLevel()))*1.1-0.05;
+//This reads the displacement texture and sets 0.5 to be 0, 1 to be 1, and 0 to be -1,
+//and then it scales it to the displacement level previously defined.
+//The multiplication and subtraction at the end is to scale it down so it doesn't exceed the window.
+//I think it's slightly faster if I do it here and not at the end in the fragColor = line in void main().
+}
+
+void main()
+{
+   FragColor = vec4(texture(Source, CoordDisplacement(vTexCoord)).rgb, 1.0);
+}