filter-blur: Allow applying Blur to a sub-region of the source only

The Blur Filter can now be applied to a region inside the source itself, the inverse of that region, and/or a feathered version of that region. This allows for easier scene setups where only some parts need to be blurred, but the rest can be left as is.

Fixes #12

data/effects/bilateral-blur.effect

@@ -9,6 +9,14 @@ uniform int u_radius;
 uniform int u_diameter;
 uniform float2 u_texelDelta;
 
+/// Region
+uniform float regionLeft;
+uniform float regionTop;
+uniform float regionRight;
+uniform float regionBottom;
+uniform float regionFeather;
+uniform float regionFeatherShift;
+
 // Settings (Private)
 uniform float bilateralSmoothing;
 uniform float bilateralSharpness;
@@ -17,6 +25,8 @@ sampler_state textureSampler {
 	Filter    = Point;
 	AddressU  = Clamp;
 	AddressV  = Clamp;
+	MinLOD    = 0;
+	MaxLOD    = 0;
 };
 
 struct VertDataIn {
@@ -38,33 +48,23 @@ VertDataOut VSDefault(VertDataIn v_in)
 }
 
 // Bilateral Blur
-float Bilateral(float x, float sigma)
+float Bilateral(float x, float sigma) {
-{
 	return 0.39894 * exp(-0.5 * (x*x) / (sigma*sigma)) / sigma;
 }
 
-float Bilateral3(float3 v, float sigma)
+float Bilateral3(float3 v, float sigma) {
-{
+	// First part is Bilateral function (1.0 / (o * sqrt(2.0 * pivalue))) with o = 1
-	// First part is Gaussian function (1.0 / (o * sqrt(2.0 * pivalue))) with o = 1
 	return 0.39894 * exp(-0.5 * dot(v,v) / (sigma*sigma)) / sigma;
 }
 
-float4 BilateralBlur(float2 p_uv, float2 p_radius,
+float4 BlurFunc(float2 uv, float4 rgba) {
- texture2d p_image, float2 p_imageTexel) {
+	float2 uvOffset = float2(0, 0);
-	float2 l_uvoffset = float2(0, 0);
-}
-
-float4 PSBilateral(VertDataOut v_in) : TARGET
-{
-	float2 l_uv = float2(0, 0);
 
 	float Z = 0.0;
 	float bZ = 1.0 / Bilateral(0.0, bilateralSharpness);
-	float4 source = u_image.Sample(textureSampler, v_in.uv);
 	float3 color = float3(0, 0, 0);
 	for (int k = 1; k <= u_radius; k++) {
-		// Advance UV by one texel.
+		uvOffset += u_texelDelta;
-		l_uv += u_texelDelta;
 
 		// Bilateral Kernel
 		float bKernel = Bilateral(abs(k), bilateralSmoothing);
@@ -72,12 +72,12 @@ float4 PSBilateral(VertDataOut v_in) : TARGET
 		float bZKernel = bZ  * bKernel;
 
 		// Sample Color
-		float3 l_p = u_image.Sample(textureSampler, v_in.uv + l_uv).rgb;
+		float3 l_p = u_image.SampleLevel(textureSampler, uv + uvOffset, 0).rgb;
-		float3 l_n = u_image.Sample(textureSampler, v_in.uv - l_uv).rgb;
+		float3 l_n = u_image.SampleLevel(textureSampler, uv - uvOffset, 0).rgb;
 
 		// Bilateral Stuff
-		float l_factor_p = Bilateral3(l_p - source.rgb, bilateralSharpness) * bZKernel;
+		float l_factor_p = Bilateral3(l_p - rgba.rgb, bilateralSharpness) * bZKernel;
-		float l_factor_n = Bilateral3(l_n - source.rgb, bilateralSharpness) * bZKernel;
+		float l_factor_n = Bilateral3(l_n - rgba.rgb, bilateralSharpness) * bZKernel;
 		Z = Z + l_factor_p + l_factor_n;
 
 		// Store Color
@@ -85,7 +85,74 @@ float4 PSBilateral(VertDataOut v_in) : TARGET
 		color += l_n * l_factor_n;
 	}
 
-	return float4(color.rgb / Z, source.a);
+	return float4(color.rgb / Z, rgba.a);
+}
+
+float4 PSBilateral(VertDataOut v_in) : TARGET {
+	float4 rgba = u_image.SampleLevel(textureSampler, v_in.uv, 0);	
+	return BlurFunc(v_in.uv, rgba);
+}
+
+float4 PSBilateralRegion(VertDataOut v_in) : TARGET {
+	float4 rgba = u_image.SampleLevel(textureSampler, v_in.uv, 0);
+	if ((v_in.uv.x < regionLeft)
+		|| (v_in.uv.x > regionRight)
+		|| (v_in.uv.y < regionTop)
+		|| (v_in.uv.y > regionBottom)) {
+		return rgba;
+	}
+
+	return BlurFunc(v_in.uv, rgba);
+}
+
+float4 PSBilateralRegionInvert(VertDataOut v_in) : TARGET {
+	float4 rgba = u_image.SampleLevel(textureSampler, v_in.uv, 0);
+	if ((v_in.uv.x > regionLeft)
+		&& (v_in.uv.x < regionRight)
+		&& (v_in.uv.y > regionTop)
+		&& (v_in.uv.y < regionBottom)) {
+		return rgba;
+	}
+	
+	return BlurFunc(v_in.uv, rgba);
+}
+
+float4 PSBilateralRegionFeather(VertDataOut v_in) : TARGET {
+	float halfFeather = (regionFeather / 2.0);
+	float feather = max(regionFeather, 0.00000001);
+	float leftFeather = clamp(((v_in.uv.x - regionLeft + halfFeather) / feather) + regionFeatherShift, 0.0, 1.0);
+	float rightFeather = clamp(((-(v_in.uv.x - regionRight) + halfFeather) / feather) + regionFeatherShift, 0.0, 1.0);
+	float topFeather = clamp(((v_in.uv.y - regionTop + halfFeather) / feather) + regionFeatherShift, 0.0, 1.0);
+	float bottomFeather = clamp(((-(v_in.uv.y - regionBottom) + halfFeather) / feather) + regionFeatherShift, 0.0, 1.0);
+	float finalFeather = min(min(leftFeather, rightFeather), min(topFeather, bottomFeather));
+	
+	float4 rgba = u_image.SampleLevel(textureSampler, v_in.uv, 0);
+	if (finalFeather <= 0.00001) {
+		return rgba;
+	} else if (finalFeather >= 0.99999) {
+		return BlurFunc(v_in.uv, rgba);
+	}
+
+	return lerp(rgba, BlurFunc(v_in.uv, rgba), finalFeather);
+}
+
+float4 PSBilateralRegionFeatherInvert(VertDataOut v_in) : TARGET {
+	float halfFeather = (regionFeather / 2.0);
+	float feather = max(regionFeather, 0.00000001);
+	float leftFeather = clamp(((v_in.uv.x - regionLeft + halfFeather) / feather) + regionFeatherShift, 0.0, 1.0);
+	float rightFeather = clamp(((-(v_in.uv.x - regionRight) + halfFeather) / feather) + regionFeatherShift, 0.0, 1.0);
+	float topFeather = clamp(((v_in.uv.y - regionTop + halfFeather) / feather) + regionFeatherShift, 0.0, 1.0);
+	float bottomFeather = clamp(((-(v_in.uv.y - regionBottom) + halfFeather) / feather) + regionFeatherShift, 0.0, 1.0);
+	float finalFeather = 1.0 - min(min(leftFeather, rightFeather), min(topFeather, bottomFeather));
+	
+	float4 rgba = u_image.SampleLevel(textureSampler, v_in.uv, 0);
+	if (finalFeather <= 0.00001) {
+		return rgba;
+	} else if (finalFeather >= 0.99999) {
+		return BlurFunc(v_in.uv, rgba);
+	}
+
+	return lerp(rgba, BlurFunc(v_in.uv, rgba), finalFeather);
 }
 
 technique Draw
@@ -96,3 +163,37 @@ technique Draw
 		pixel_shader  = PSBilateral(v_in);
 	}
 }
+
+technique DrawRegion
+{
+	pass
+	{
+		vertex_shader = VSDefault(v_in);
+		pixel_shader = PSBilateralRegion(v_in);
+	}
+}
+technique DrawRegionInvert
+{
+	pass
+	{
+		vertex_shader = VSDefault(v_in);
+		pixel_shader = PSBilateralRegionInvert(v_in);
+	}
+}
+
+technique DrawRegionFeather
+{
+	pass
+	{
+		vertex_shader = VSDefault(v_in);
+		pixel_shader = PSBilateralRegionFeather(v_in);
+	}
+}
+technique DrawRegionFeatherInvert
+{
+	pass
+	{
+		vertex_shader = VSDefault(v_in);
+		pixel_shader = PSBilateralRegionFeatherInvert(v_in);
+	}
+}

data/effects/box-blur.effect

@@ -9,10 +9,21 @@ uniform int u_radius;
 uniform int u_diameter;
 uniform float2 u_texelDelta;
 
+/// Region
+uniform float regionLeft;
+uniform float regionTop;
+uniform float regionRight;
+uniform float regionBottom;
+uniform float regionFeather;
+uniform float regionFeatherShift;
+
+// Data
 sampler_state textureSampler {
 	Filter    = Point;
 	AddressU  = Clamp;
 	AddressV  = Clamp;
+	MinLOD    = 0;
+	MaxLOD    = 0;
 };
 
 struct VertDataIn {
@@ -34,15 +45,80 @@ VertDataOut VSDefault(VertDataIn v_in)
 }
 
 // Box Blur
-float4 PSBox(VertDataOut v_in) : TARGET
+float4 BlurFunc(float2 uv, float4 rgba) {
-{
+	float4 final = rgba;
-	float4 rgba = u_image.Sample(textureSampler, v_in.uv);
 	for (int k = 1; k <= u_radius; k++) {
-		rgba += u_image.Sample(textureSampler, v_in.uv + (u_texelDelta * k));
+		final += u_image.SampleLevel(textureSampler, uv + (u_texelDelta * k), 0);
-		rgba += u_image.Sample(textureSampler, v_in.uv - (u_texelDelta * k));
+		final += u_image.SampleLevel(textureSampler, uv - (u_texelDelta * k), 0);
 	}
-	rgba = rgba / u_diameter;
+	return final / u_diameter;
+}
+
+float4 PSBox(VertDataOut v_in) : TARGET {
+	float4 rgba = u_image.SampleLevel(textureSampler, v_in.uv, 0);
+	return BlurFunc(v_in.uv, rgba);
+}
+
+float4 PSBoxRegion(VertDataOut v_in) : TARGET {
+	float4 rgba = u_image.SampleLevel(textureSampler, v_in.uv, 0);
+	if ((v_in.uv.x < regionLeft)
+		|| (v_in.uv.x > regionRight)
+		|| (v_in.uv.y < regionTop)
+		|| (v_in.uv.y > regionBottom)) {
 		return rgba;
+	}
+
+	return BlurFunc(v_in.uv, rgba);
+}
+
+float4 PSBoxRegionInvert(VertDataOut v_in) : TARGET {
+	float4 rgba = u_image.SampleLevel(textureSampler, v_in.uv, 0);
+	if ((v_in.uv.x > regionLeft)
+		&& (v_in.uv.x < regionRight)
+		&& (v_in.uv.y > regionTop)
+		&& (v_in.uv.y < regionBottom)) {
+		return rgba;
+	}
+	
+	return BlurFunc(v_in.uv, rgba);
+}
+
+float4 PSBoxRegionFeather(VertDataOut v_in) : TARGET {
+	float halfFeather = (regionFeather / 2.0);
+	float feather = max(regionFeather, 0.00000001);
+	float leftFeather = clamp(((v_in.uv.x - regionLeft + halfFeather) / feather) + regionFeatherShift, 0.0, 1.0);
+	float rightFeather = clamp(((-(v_in.uv.x - regionRight) + halfFeather) / feather) + regionFeatherShift, 0.0, 1.0);
+	float topFeather = clamp(((v_in.uv.y - regionTop + halfFeather) / feather) + regionFeatherShift, 0.0, 1.0);
+	float bottomFeather = clamp(((-(v_in.uv.y - regionBottom) + halfFeather) / feather) + regionFeatherShift, 0.0, 1.0);
+	float finalFeather = min(min(leftFeather, rightFeather), min(topFeather, bottomFeather));
+	
+	float4 rgba = u_image.SampleLevel(textureSampler, v_in.uv, 0);
+	if (finalFeather <= 0.00001) {
+		return rgba;
+	} else if (finalFeather >= 0.99999) {
+		return BlurFunc(v_in.uv, rgba);
+	}
+
+	return lerp(rgba, BlurFunc(v_in.uv, rgba), finalFeather);
+}
+
+float4 PSBoxRegionFeatherInvert(VertDataOut v_in) : TARGET {
+	float halfFeather = (regionFeather / 2.0);
+	float feather = max(regionFeather, 0.00000001);
+	float leftFeather = clamp(((v_in.uv.x - regionLeft + halfFeather) / feather) + regionFeatherShift, 0.0, 1.0);
+	float rightFeather = clamp(((-(v_in.uv.x - regionRight) + halfFeather) / feather) + regionFeatherShift, 0.0, 1.0);
+	float topFeather = clamp(((v_in.uv.y - regionTop + halfFeather) / feather) + regionFeatherShift, 0.0, 1.0);
+	float bottomFeather = clamp(((-(v_in.uv.y - regionBottom) + halfFeather) / feather) + regionFeatherShift, 0.0, 1.0);
+	float finalFeather = 1.0 - min(min(leftFeather, rightFeather), min(topFeather, bottomFeather));
+	
+	float4 rgba = u_image.SampleLevel(textureSampler, v_in.uv, 0);
+	if (finalFeather <= 0.00001) {
+		return rgba;
+	} else if (finalFeather >= 0.99999) {
+		return BlurFunc(v_in.uv, rgba);
+	}
+
+	return lerp(rgba, BlurFunc(v_in.uv, rgba), finalFeather);
 }
 
 technique Draw
@@ -53,3 +129,39 @@ technique Draw
 		pixel_shader  = PSBox(v_in);
 	}
 }
+
+technique DrawRegion
+{
+	pass
+	{
+		vertex_shader = VSDefault(v_in);
+		pixel_shader = PSBoxRegion(v_in);
+	}
+}
+
+technique DrawRegionInvert
+{
+	pass
+	{
+		vertex_shader = VSDefault(v_in);
+		pixel_shader = PSBoxRegionInvert(v_in);
+	}
+}
+
+technique DrawRegionFeather
+{
+	pass
+	{
+		vertex_shader = VSDefault(v_in);
+		pixel_shader = PSBoxRegionFeather(v_in);
+	}
+}
+
+technique DrawRegionFeatherInvert
+{
+	pass
+	{
+		vertex_shader = VSDefault(v_in);
+		pixel_shader = PSBoxRegionFeatherInvert(v_in);
+	}
+}

data/effects/gaussian-blur.effect

@@ -9,6 +9,14 @@ uniform int u_radius;
 uniform int u_diameter;
 uniform float2 u_texelDelta;
 
+/// Region
+uniform float regionLeft;
+uniform float regionTop;
+uniform float regionRight;
+uniform float regionBottom;
+uniform float regionFeather;
+uniform float regionFeatherShift;
+
 // Settings (Private)
 //uniform float registerkernel[25];
 uniform texture2d kernel;
@@ -40,18 +48,84 @@ VertDataOut VSDefault(VertDataIn v_in)
 	return vert_out;
 }
 
-float4 PSGaussian(VertDataOut v_in) : TARGET {
+float4 BlurFunc(float2 uv, float4 rgba) {
 	float2 uvOffset = float2(0, 0);
-	float4 rgba = u_image.SampleLevel(textureSampler, v_in.uv, 0)
+	float4 final = rgba * kernel.SampleLevel(textureSampler, (float2(0, u_radius - 1) * kernelTexel), 0).r;
-		* kernel.SampleLevel(textureSampler, (float2(0, u_radius - 1) * kernelTexel), 0).r;
 	for (int k = 1; k <= u_radius; k++) {
 		uvOffset += u_texelDelta;
 		float l_g = kernel.SampleLevel(textureSampler, (float2(k, u_radius - 1) * kernelTexel), 0).r;
-		float4 l_p = u_image.SampleLevel(textureSampler, v_in.uv + uvOffset, 0) * l_g;
+		float4 l_p = u_image.SampleLevel(textureSampler, uv + uvOffset, 0);
-		float4 l_n = u_image.SampleLevel(textureSampler, v_in.uv - uvOffset, 0) * l_g;
+		float4 l_n = u_image.SampleLevel(textureSampler, uv - uvOffset, 0);
-		rgba += l_p + l_n;
+		final += (l_p + l_n) * l_g;
 	}
+	return final;
+}
+
+float4 PSGaussian(VertDataOut v_in) : TARGET {
+	float4 rgba = u_image.SampleLevel(textureSampler, v_in.uv, 0);	
+	return BlurFunc(v_in.uv, rgba);
+}
+
+float4 PSGaussianRegion(VertDataOut v_in) : TARGET {
+	float4 rgba = u_image.SampleLevel(textureSampler, v_in.uv, 0);
+	if ((v_in.uv.x < regionLeft)
+		|| (v_in.uv.x > regionRight)
+		|| (v_in.uv.y < regionTop)
+		|| (v_in.uv.y > regionBottom)) {
 		return rgba;
+	}
+
+	return BlurFunc(v_in.uv, rgba);
+}
+
+float4 PSGaussianRegionInvert(VertDataOut v_in) : TARGET {
+	float4 rgba = u_image.SampleLevel(textureSampler, v_in.uv, 0);
+	if ((v_in.uv.x > regionLeft)
+		&& (v_in.uv.x < regionRight)
+		&& (v_in.uv.y > regionTop)
+		&& (v_in.uv.y < regionBottom)) {
+		return rgba;
+	}
+	
+	return BlurFunc(v_in.uv, rgba);
+}
+
+float4 PSGaussianRegionFeather(VertDataOut v_in) : TARGET {
+	float halfFeather = (regionFeather / 2.0);
+	float feather = max(regionFeather, 0.00000001);
+	float leftFeather = clamp(((v_in.uv.x - regionLeft + halfFeather) / feather) + regionFeatherShift, 0.0, 1.0);
+	float rightFeather = clamp(((-(v_in.uv.x - regionRight) + halfFeather) / feather) + regionFeatherShift, 0.0, 1.0);
+	float topFeather = clamp(((v_in.uv.y - regionTop + halfFeather) / feather) + regionFeatherShift, 0.0, 1.0);
+	float bottomFeather = clamp(((-(v_in.uv.y - regionBottom) + halfFeather) / feather) + regionFeatherShift, 0.0, 1.0);
+	float finalFeather = min(min(leftFeather, rightFeather), min(topFeather, bottomFeather));
+	
+	float4 rgba = u_image.SampleLevel(textureSampler, v_in.uv, 0);
+	if (finalFeather <= 0.00001) {
+		return rgba;
+	} else if (finalFeather >= 0.99999) {
+		return BlurFunc(v_in.uv, rgba);
+	}
+
+	return lerp(rgba, BlurFunc(v_in.uv, rgba), finalFeather);
+}
+
+float4 PSGaussianRegionFeatherInvert(VertDataOut v_in) : TARGET {
+	float halfFeather = (regionFeather / 2.0);
+	float feather = max(regionFeather, 0.00000001);
+	float leftFeather = clamp(((v_in.uv.x - regionLeft + halfFeather) / feather) + regionFeatherShift, 0.0, 1.0);
+	float rightFeather = clamp(((-(v_in.uv.x - regionRight) + halfFeather) / feather) + regionFeatherShift, 0.0, 1.0);
+	float topFeather = clamp(((v_in.uv.y - regionTop + halfFeather) / feather) + regionFeatherShift, 0.0, 1.0);
+	float bottomFeather = clamp(((-(v_in.uv.y - regionBottom) + halfFeather) / feather) + regionFeatherShift, 0.0, 1.0);
+	float finalFeather = 1.0 - min(min(leftFeather, rightFeather), min(topFeather, bottomFeather));
+	
+	float4 rgba = u_image.SampleLevel(textureSampler, v_in.uv, 0);
+	if (finalFeather <= 0.00001) {
+		return rgba;
+	} else if (finalFeather >= 0.99999) {
+		return BlurFunc(v_in.uv, rgba);
+	}
+
+	return lerp(rgba, BlurFunc(v_in.uv, rgba), finalFeather);
 }
 
 technique Draw
@@ -62,3 +136,37 @@ technique Draw
 		pixel_shader  = PSGaussian(v_in);
 	}
 }
+
+technique DrawRegion
+{
+	pass
+	{
+		vertex_shader = VSDefault(v_in);
+		pixel_shader = PSGaussianRegion(v_in);
+	}
+}
+technique DrawRegionInvert
+{
+	pass
+	{
+		vertex_shader = VSDefault(v_in);
+		pixel_shader = PSGaussianRegionInvert(v_in);
+	}
+}
+
+technique DrawRegionFeather
+{
+	pass
+	{
+		vertex_shader = VSDefault(v_in);
+		pixel_shader = PSGaussianRegionFeather(v_in);
+	}
+}
+technique DrawRegionFeatherInvert
+{
+	pass
+	{
+		vertex_shader = VSDefault(v_in);
+		pixel_shader = PSGaussianRegionFeatherInvert(v_in);
+	}
+}

data/locale/en-US.ini

@@ -12,6 +12,22 @@ Filter.Blur.Size="Size (Pixel)"
 Filter.Blur.Size.Description="Area size of the blur, large sizes may cause:\n- Skipped frames\n- Frame loss or drops\n- Input lag\n- GPU overheating\n- or other issues."
 Filter.Blur.Bilateral.Smoothing="Smoothing"
 Filter.Blur.Bilateral.Sharpness="Sharpness"
+Filter.Blur.Region="Apply to Region only"
+Filter.Blur.Region.Description="Only apply the blur to a region inside the source."
+Filter.Blur.Region.Left="Left Edge"
+Filter.Blur.Region.Left.Description="Distance to left edge of the source in percent."
+Filter.Blur.Region.Top="Top Edge"
+Filter.Blur.Region.Top.Description="Distance to top edge of the source in percent."
+Filter.Blur.Region.Right="Right Edge"
+Filter.Blur.Region.Right.Description="Distance to right edge of the source in percent."
+Filter.Blur.Region.Bottom="Bottom Edge"
+Filter.Blur.Region.Bottom.Description="Distance to bottom edge of the source in percent."
+Filter.Blur.Region.Feather="Feather Area"
+Filter.Blur.Region.Feather.Description="Size of the smoothing area in percent, or 0 to turn off feather."
+Filter.Blur.Region.Feather.Shift="Feather Shift"
+Filter.Blur.Region.Feather.Shift.Description="Shift of the Feather area, positive is inwards, negative is outwards."
+Filter.Blur.Region.Invert="Invert Region"
+Filter.Blur.Region.Invert.Description="Invert the region so that everything but this area is blurred."
 Filter.Blur.ColorFormat="Color Format"
 
 # Filter - Custom Shader

source/filter-blur.cpp

@@ -44,6 +44,16 @@ extern "C" {
 #define S_BILATERAL_SMOOTHING				"Filter.Blur.Bilateral.Smoothing"
 #define S_BILATERAL_SHARPNESS				"Filter.Blur.Bilateral.Sharpness"
 
+// Region
+#define S_REGION					"Filter.Blur.Region"
+#define S_REGION_LEFT					"Filter.Blur.Region.Left"
+#define S_REGION_TOP					"Filter.Blur.Region.Top"
+#define S_REGION_RIGHT					"Filter.Blur.Region.Right"
+#define S_REGION_BOTTOM					"Filter.Blur.Region.Bottom"
+#define S_REGION_FEATHER				"Filter.Blur.Region.Feather"
+#define S_REGION_FEATHER_SHIFT				"Filter.Blur.Region.Feather.Shift"
+#define S_REGION_INVERT					"Filter.Blur.Region.Invert"
+
 // Advanced
 #define S_FILTER_BLUR_COLORFORMAT			"Filter.Blur.ColorFormat"	
 
@@ -96,6 +106,7 @@ Filter::Blur::Blur() {
 		} catch (std::runtime_error ex) {
 			P_LOG_ERROR("<filter-blur> Loading effect '%s' (path: '%s') failed with error(s): %s",
 				kv.first.c_str(), kv.second.c_str(), ex.what());
+			obs_leave_graphics();
 			return;
 		}
 	}
@@ -160,6 +171,16 @@ void Filter::Blur::get_defaults(obs_data_t *data) {
 	obs_data_set_default_double(data, S_BILATERAL_SMOOTHING, 50.0);
 	obs_data_set_default_double(data, S_BILATERAL_SHARPNESS, 90.0);
 
+	// Region
+	obs_data_set_default_bool(data, S_REGION, false);
+	obs_data_set_default_double(data, S_REGION_LEFT, 0.0f);
+	obs_data_set_default_double(data, S_REGION_TOP, 0.0f);
+	obs_data_set_default_double(data, S_REGION_RIGHT, 0.0f);
+	obs_data_set_default_double(data, S_REGION_BOTTOM, 0.0f);
+	obs_data_set_default_double(data, S_REGION_FEATHER, 0.0f);
+	obs_data_set_default_double(data, S_REGION_FEATHER_SHIFT, 0.0f);
+	obs_data_set_default_bool(data, S_REGION_INVERT, false);
+
 	// Advanced
 	obs_data_set_default_bool(data, S_ADVANCED, false);
 	obs_data_set_default_int(data, S_FILTER_BLUR_COLORFORMAT, ColorFormat::RGB);
@@ -186,6 +207,25 @@ obs_properties_t * Filter::Blur::get_properties(void *) {
 	p = obs_properties_add_float_slider(pr, S_BILATERAL_SHARPNESS, P_TRANSLATE(S_BILATERAL_SHARPNESS), 0, 99.99, 0.01);
 	obs_property_set_long_description(p, P_TRANSLATE(P_DESC(S_BILATERAL_SHARPNESS)));
 
+	// Region
+	p = obs_properties_add_bool(pr, S_REGION, P_TRANSLATE(S_REGION));
+	obs_property_set_long_description(p, P_TRANSLATE(P_DESC(S_REGION)));
+	obs_property_set_modified_callback(p, modified_properties);
+	p = obs_properties_add_float_slider(pr, S_REGION_LEFT, P_TRANSLATE(S_REGION_LEFT), 0.0, 100.0, 0.01);
+	obs_property_set_long_description(p, P_TRANSLATE(P_DESC(S_REGION_LEFT)));
+	p = obs_properties_add_float_slider(pr, S_REGION_TOP, P_TRANSLATE(S_REGION_TOP), 0.0, 100.0, 0.01);
+	obs_property_set_long_description(p, P_TRANSLATE(P_DESC(S_REGION_TOP)));
+	p = obs_properties_add_float_slider(pr, S_REGION_RIGHT, P_TRANSLATE(S_REGION_RIGHT), 0.0, 100.0, 0.01);
+	obs_property_set_long_description(p, P_TRANSLATE(P_DESC(S_REGION_RIGHT)));
+	p = obs_properties_add_float_slider(pr, S_REGION_BOTTOM, P_TRANSLATE(S_REGION_BOTTOM), 0.0, 100.0, 0.01);
+	obs_property_set_long_description(p, P_TRANSLATE(P_DESC(S_REGION_BOTTOM)));
+	p = obs_properties_add_float_slider(pr, S_REGION_FEATHER, P_TRANSLATE(S_REGION_FEATHER), 0.0, 50.0, 0.01);
+	obs_property_set_long_description(p, P_TRANSLATE(P_DESC(S_REGION_FEATHER)));
+	p = obs_properties_add_float_slider(pr, S_REGION_FEATHER_SHIFT, P_TRANSLATE(S_REGION_FEATHER_SHIFT), -100.0, 100.0, 0.01);
+	obs_property_set_long_description(p, P_TRANSLATE(P_DESC(S_REGION_FEATHER_SHIFT)));
+	p = obs_properties_add_bool(pr, S_REGION_INVERT, P_TRANSLATE(S_REGION_INVERT));
+	obs_property_set_long_description(p, P_TRANSLATE(P_DESC(S_REGION_INVERT)));
+
 	// Advanced
 	p = obs_properties_add_bool(pr, S_ADVANCED, P_TRANSLATE(S_ADVANCED));
 	obs_property_set_long_description(p, P_TRANSLATE(P_DESC(S_ADVANCED)));
@@ -216,6 +256,16 @@ bool Filter::Blur::modified_properties(obs_properties_t *pr, obs_property_t *, o
 	obs_property_set_visible(obs_properties_get(pr, S_BILATERAL_SMOOTHING), showBilateral);
 	obs_property_set_visible(obs_properties_get(pr, S_BILATERAL_SHARPNESS), showBilateral);
 
+	// Region
+	bool showRegion = obs_data_get_bool(d, S_REGION);
+	obs_property_set_visible(obs_properties_get(pr, S_REGION_LEFT), showRegion);
+	obs_property_set_visible(obs_properties_get(pr, S_REGION_TOP), showRegion);
+	obs_property_set_visible(obs_properties_get(pr, S_REGION_RIGHT), showRegion);
+	obs_property_set_visible(obs_properties_get(pr, S_REGION_BOTTOM), showRegion);
+	obs_property_set_visible(obs_properties_get(pr, S_REGION_FEATHER), showRegion);
+	obs_property_set_visible(obs_properties_get(pr, S_REGION_FEATHER_SHIFT), showRegion);
+	obs_property_set_visible(obs_properties_get(pr, S_REGION_INVERT), showRegion);
+
 	// Advanced
 	bool showAdvanced = false;
 	if (obs_data_get_bool(d, S_ADVANCED))
@@ -312,8 +362,24 @@ void Filter::Blur::Instance::update(obs_data_t *data) {
 	m_bilateralSmoothing = obs_data_get_double(data, S_BILATERAL_SMOOTHING) / 100.0;
 	m_bilateralSharpness = obs_data_get_double(data, S_BILATERAL_SHARPNESS) / 100.0;
 
+	// Region
+	m_region.enabled = obs_data_get_bool(data, S_REGION);
+	if (m_region.enabled) {
+		m_region.left = float_t(obs_data_get_double(data, S_REGION_LEFT) / 100.0);
+		m_region.top = float_t(obs_data_get_double(data, S_REGION_TOP) / 100.0);
+		m_region.right = 1.0 - float_t(obs_data_get_double(data, S_REGION_RIGHT) / 100.0);
+		m_region.bottom = 1.0 - float_t(obs_data_get_double(data, S_REGION_BOTTOM) / 100.0);
+		m_region.feather = float_t(obs_data_get_double(data, S_REGION_FEATHER) / 100.0);
+		m_region.feather_shift = float_t(obs_data_get_double(data, S_REGION_FEATHER_SHIFT) / 100.0);
+		m_region.invert = obs_data_get_bool(data, S_REGION_INVERT);
+	}
+
 	// Advanced
+	if (obs_data_get_bool(data, S_ADVANCED)) {
 		m_colorFormat = obs_data_get_int(data, S_FILTER_BLUR_COLORFORMAT);
+	} else {
+		m_colorFormat = obs_data_get_default_int(data, S_FILTER_BLUR_COLORFORMAT);
+	}
 }
 
 uint32_t Filter::Blur::Instance::get_width() {
@@ -469,6 +535,17 @@ void Filter::Blur::Instance::video_render(gs_effect_t *effect) {
 		std::make_tuple("Horizontal", m_rtHorizontal, 1.0f / baseW, 0.0f),
 		std::make_tuple("Vertical", m_rtVertical, 0.0f, 1.0f / baseH),
 	};
+	std::string pass = "Draw";
+	if (m_region.enabled) {
+		if (m_region.feather > 0) {
+			pass = "DrawRegionFeather";
+		} else {
+			pass = "DrawRegion";
+		}
+		if (m_region.invert) {
+			pass += "Invert";
+		}
+	}
 	for (auto v : kvs) {
 		const char* name = std::get<0>(v);
 		gs_texrender_t* rt = std::get<1>(v);
@@ -497,7 +574,7 @@ void Filter::Blur::Instance::video_render(gs_effect_t *effect) {
 		gs_clear(GS_CLEAR_COLOR | GS_CLEAR_DEPTH, &black, 0, 0);
 
 		// Render
-		while (gs_effect_loop(m_effect->get_object(), "Draw")) {
+		while (gs_effect_loop(m_effect->get_object(), pass.c_str())) {
 			gs_draw_sprite(intermediate, 0, baseW, baseH);
 		}
 
@@ -578,6 +655,27 @@ bool Filter::Blur::Instance::apply_shared_param(gs_texture_t* input, float texel
 	result = result && gs_set_param_int(m_effect->get_object(), "u_radius", (int)m_size);
 	result = result && gs_set_param_int(m_effect->get_object(), "u_diameter", (int)(1 + (m_size * 2)));
 
+	if (m_region.enabled) {
+		if (m_effect->has_parameter("regionLeft")) {
+			m_effect->get_parameter("regionLeft").set_float(m_region.left);
+		}
+		if (m_effect->has_parameter("regionTop")) {
+			m_effect->get_parameter("regionTop").set_float(m_region.top);
+		}
+		if (m_effect->has_parameter("regionRight")) {
+			m_effect->get_parameter("regionRight").set_float(m_region.right);
+		}
+		if (m_effect->has_parameter("regionBottom")) {
+			m_effect->get_parameter("regionBottom").set_float(m_region.bottom);
+		}
+		if (m_effect->has_parameter("regionFeather")) {
+			m_effect->get_parameter("regionFeather").set_float(m_region.feather);
+		}
+		if (m_effect->has_parameter("regionFeatherShift")) {
+			m_effect->get_parameter("regionFeatherShift").set_float(m_region.feather_shift);
+		}
+	}
+
 	return result;
 }
 

source/filter-blur.h

@@ -98,6 +98,18 @@ namespace Filter {
 			double_t m_bilateralSmoothing;
 			double_t m_bilateralSharpness;
 
+			// Regional
+			struct Region {
+				bool enabled;
+				float_t left;
+				float_t top;
+				float_t right;
+				float_t bottom;
+				float_t feather;
+				float_t feather_shift;
+				bool invert;
+			} m_region;
+
 			// Advanced
 			bool m_errorLogged = false;
 			uint64_t m_colorFormat;