diff --git a/bgfx/shaders/dx11/chains/hlsl/fs_post.bin b/bgfx/shaders/dx11/chains/hlsl/fs_post.bin
index 927c16d8057..b22fb024fb8 100644
Binary files a/bgfx/shaders/dx11/chains/hlsl/fs_post.bin and b/bgfx/shaders/dx11/chains/hlsl/fs_post.bin differ
diff --git a/bgfx/shaders/dx9/chains/hlsl/fs_post.bin b/bgfx/shaders/dx9/chains/hlsl/fs_post.bin
index df24551cb4e..8cc13a336da 100644
Binary files a/bgfx/shaders/dx9/chains/hlsl/fs_post.bin and b/bgfx/shaders/dx9/chains/hlsl/fs_post.bin differ
diff --git a/bgfx/shaders/gles/chains/hlsl/fs_post.bin b/bgfx/shaders/gles/chains/hlsl/fs_post.bin
index f7039993aac..a48adbecf4f 100644
Binary files a/bgfx/shaders/gles/chains/hlsl/fs_post.bin and b/bgfx/shaders/gles/chains/hlsl/fs_post.bin differ
diff --git a/bgfx/shaders/glsl/chains/hlsl/fs_post.bin b/bgfx/shaders/glsl/chains/hlsl/fs_post.bin
index 49f23896de7..2bfa4c7145f 100644
Binary files a/bgfx/shaders/glsl/chains/hlsl/fs_post.bin and b/bgfx/shaders/glsl/chains/hlsl/fs_post.bin differ
diff --git a/bgfx/shaders/metal/chains/hlsl/fs_post.bin b/bgfx/shaders/metal/chains/hlsl/fs_post.bin
index ad8382250a9..ab0fc156fd5 100644
Binary files a/bgfx/shaders/metal/chains/hlsl/fs_post.bin and b/bgfx/shaders/metal/chains/hlsl/fs_post.bin differ
diff --git a/hlsl/bloom.fx b/hlsl/bloom.fx
index db23995d55b..42c65e6a45b 100644
--- a/hlsl/bloom.fx
+++ b/hlsl/bloom.fx
@@ -273,14 +273,11 @@ VS_OUTPUT vs_main(VS_INPUT Input)
 
 	Output.Color = Input.Color;
 
-	float2 TexCoord = Input.TexCoord;
-	TexCoord += 0.5f / TargetDims; // half texel offset correction (DX9)
+	Output.TexCoord = Input.TexCoord;
+	Output.TexCoord += 0.5f / TargetDims; // half texel offset correction (DX9)
 
-	Output.TexCoord = TexCoord.xy;
-
-	TexCoord += 0.5f / SourceDims;
-
-	Output.BloomCoord = TexCoord.xy;
+	Output.BloomCoord = Output.TexCoord;
+	Output.BloomCoord += 0.5f / SourceDims;
 
 	return Output;
 }
diff --git a/hlsl/post.fx b/hlsl/post.fx
index 6d8077e2037..717c919d8a7 100644
--- a/hlsl/post.fx
+++ b/hlsl/post.fx
@@ -253,9 +253,13 @@ float4 ps_main(PS_INPUT Input) : COLOR
 			float ColorBrightness = 0.299f * BaseColor.r + 0.587f * BaseColor.g + 0.114 * BaseColor.b;
 
 			float ScanlineCoord = SourceCoord.y;
-			ScanlineCoord += QuadDims.y <= SourceDims.y * 2.0f
-				? 0.5f / QuadDims.y // uncenter scanlines if the quad is less than twice the size of the source
-				: 0.0f;
+			ScanlineCoord += SwapXY
+				? QuadDims.x <= SourceDims.x * 2.0f
+					? 0.5f / QuadDims.x // uncenter scanlines if the quad is less than twice the size of the source
+					: 0.0f
+				: QuadDims.y <= SourceDims.y * 2.0f
+					? 0.5f / QuadDims.y // uncenter scanlines if the quad is less than twice the size of the source
+					: 0.0f;
 
 			ScanlineCoord *= SourceDims.y * ScanlineScale * PI;
 
diff --git a/src/osd/modules/render/bgfx/shaders/chains/hlsl/fs_post.sc b/src/osd/modules/render/bgfx/shaders/chains/hlsl/fs_post.sc
index a0d6f56772a..63800bb61d3 100644
--- a/src/osd/modules/render/bgfx/shaders/chains/hlsl/fs_post.sc
+++ b/src/osd/modules/render/bgfx/shaders/chains/hlsl/fs_post.sc
@@ -149,9 +149,13 @@ void main()
 			float ColorBrightness = 0.299 * BaseColor.r + 0.587 * BaseColor.g + 0.114 * BaseColor.b;
 
 			float ScanCoord = BaseCoord.y;
-			ScanCoord += u_quad_dims.y <= u_source_dims.y * 2.0f
-				? 0.5f / u_quad_dims.y // uncenter scanlines if the quad is less than twice the size of the source
-				: 0.0f;
+			ScanCoord += u_swap_xy.x > 0.0
+				? u_quad_dims.x <= u_source_dims.x * 2.0
+					? 0.5 / u_quad_dims.x // uncenter scanlines if the quad is less than twice the size of the source
+					: 0.0
+				: u_quad_dims.y <= u_source_dims.y * 2.0
+					? 0.5 / u_quad_dims.y // uncenter scanlines if the quad is less than twice the size of the source
+					: 0.0;
 
 			ScanCoord *= u_source_dims.y * u_scanline_scale.x * 3.1415927; // PI