obs-filters: Add sharpen filter

plugins/obs-filters/data/locale/en-US.ini

@@ -4,6 +4,7 @@ AsyncDelayFilter="Video Delay (Async)"
 CropFilter="Crop"
 ChromaKeyFilter="Chroma Key"
 ColorKeyFilter="Color Key"
+SharpnessFilter="Sharpen"
 DelayMs="Delay (milliseconds)"
 Type="Type"
 MaskBlendType.MaskColor="Alpha Mask (Color Channel)"

plugins/obs-filters/data/sharpness.effect

@@ -0,0 +1,118 @@
+// Based on libretro shader https://github.com/libretro/common-shaders/blob/master/test/lab/misc/sharpness.cg
+// Converted to obs effect file by Nibbles
+
+uniform float4x4 ViewProj;
+uniform texture2d image;
+uniform float4x4 color_matrix;
+uniform float3 color_range_min = {0.0, 0.0, 0.0};
+uniform float3 color_range_max = {1.0, 1.0, 1.0};
+
+uniform texture2d target;
+uniform float4 color = {1.0, 1.0, 1.0, 1.0};
+
+uniform float sharpness;
+uniform float texture_width;
+uniform float texture_height;
+
+sampler_state def_sampler {
+	Filter   = Linear;
+	AddressU = Clamp;
+	AddressV = Clamp;
+};
+
+struct VertInOut {
+	float4 pos : POSITION;
+	float2 uv  : TEXCOORD0;
+};
+
+struct VertOut {
+	float4 pos : POSITION;
+	float4 col : COLOR;
+	float2 uv  : TEXCOORD0;
+	float4 t1  : TEXCOORD1;
+	float4 t2  : TEXCOORD2;
+	float4 t3  : TEXCOORD3;
+};
+
+VertOut VSDefault(VertInOut vert_in)
+{
+	VertOut vert_out;
+	vert_out.pos = mul(float4(vert_in.pos.xyz, 1.0), ViewProj);
+	vert_out.uv  = vert_in.uv;
+	vert_out.col = color;
+
+	float2 ps = float2(1.0/texture_width, 1.0/texture_height);
+	float dx = ps.x;
+	float dy = ps.y;
+
+	vert_out.t1 = vert_in.uv.xxxy + float4( -dx, 0, dx,    -dy); //  A  B  C
+	vert_out.t2 = vert_in.uv.xxxy + float4( -dx, 0, dx,      0); //  D  E  F
+	vert_out.t3 = vert_in.uv.xxxy + float4( -dx, 0, dx,     dy); //  G  H  I
+	return vert_out;
+}
+
+float4 PSDrawBare(VertOut vert_in) : TARGET
+{
+	float4 E  = image.Sample(def_sampler, vert_in.uv);
+
+	float4 colorx = 8*E;
+	float4 B = image.Sample(def_sampler, vert_in.t1.yw);
+	float4 D = image.Sample(def_sampler, vert_in.t2.xw);
+	float4 F = image.Sample(def_sampler, vert_in.t2.zw);
+	float4 H = image.Sample(def_sampler, vert_in.t3.yw);
+	colorx -= image.Sample(def_sampler, vert_in.t1.xw);
+	colorx -= B;
+	colorx -= image.Sample(def_sampler, vert_in.t1.zw);
+	colorx -= D;
+	colorx -= F;
+	colorx -= image.Sample(def_sampler, vert_in.t3.xw);
+	colorx -= H;
+	colorx -= image.Sample(def_sampler, vert_in.t3.zw);
+
+	colorx = ((E!=F && E!=D) || (E!=B && E!=H)) ? saturate(E + colorx*sharpness) : E;
+
+	return colorx;
+}
+
+float4 PSDrawMatrix(VertOut vert_in) : TARGET
+{
+	float4 E  = image.Sample(def_sampler, vert_in.uv);
+
+	float4 colorx = 8*E;
+	float4 B = image.Sample(def_sampler, vert_in.t1.yw);
+	float4 D = image.Sample(def_sampler, vert_in.t2.xw);
+	float4 F = image.Sample(def_sampler, vert_in.t2.zw);
+	float4 H = image.Sample(def_sampler, vert_in.t3.yw);
+	colorx -= image.Sample(def_sampler, vert_in.t1.xw);
+	colorx -= B;
+	colorx -= image.Sample(def_sampler, vert_in.t1.zw);
+	colorx -= D;
+	colorx -= F;
+	colorx -= image.Sample(def_sampler, vert_in.t3.xw);
+	colorx -= H;
+	colorx -= image.Sample(def_sampler, vert_in.t3.zw);
+
+	colorx = ((E!=F && E!=D) || (E!=B && E!=H)) ? saturate(E + colorx*sharpness) : E;
+
+	float4 yuv = colorx;
+	yuv.xyz = clamp(yuv.xyz, color_range_min, color_range_max);
+	return saturate(mul(float4(yuv.xyz, 1.0), color_matrix));
+}
+
+technique Draw
+{
+	pass
+	{
+		vertex_shader = VSDefault(vert_in);
+		pixel_shader  = PSDrawBare(vert_in);
+	}
+}
+
+technique DrawMatrix
+{
+	pass
+	{
+		vertex_shader = VSDefault(vert_in);
+		pixel_shader  = PSDrawMatrix(vert_in);
+	}
+}