renderProgram guiBlur {
	program vertex cg { <%
		struct VsInputs {
			float3 pos	: $positionAttrib;
			float2 tex	: $texCoordAttrib;
			float4 col	: $colorAttrib;
		};

		struct VsOutputs {
			float2 texCoord0	: TEXCOORD0;
			float4 col			: COLOR0;
		};

		float2 screenSize : $currentRenderTexelSize;
		
		VsOutputs vertex( VsInputs indata ) {
			VsOutputs outdata;

			$if r_32ByteVtx
			indata.tex *= 1.0f / 4096.0f;
			$endif

			float2 coord = indata.tex.xy;
			coord.y = 1.0f - coord.y;

			outdata.texCoord0 = coord * screenSize;
			outdata.col = indata.col;

			return outdata;
		}
	%> }

	program fragment cg { <%
		struct VsOutputs {
			float2 texCoord0	: TEXCOORD0;
			float4 col			: COLOR0;
		};

		samplerRECT framebuffer : $currentRender;
		samplerRECT blured : $map;

		#define OFFSET_START -2
		#define GRID_SIZE 4
		
		float4 fragment( VsOutputs indata ) : COLOR {
			// this is the number of pixels between grid squares, increase to expand blur grid area
			float2 offset = float2( 2.2f, 2.2f );

			float4 clean = texRECT( framebuffer, indata.texCoord0 );

			float4 blur = 0.0f;
			float2 currentOffset = offset * OFFSET_START;

			for ( int y = 0; y < GRID_SIZE; y++ ) {
				for ( int x = 0; x < GRID_SIZE; x++ ) {
					blur += texRECT( blured, (indata.texCoord0 + currentOffset)/4 );
					currentOffset.x += offset.x;
				}
				
				currentOffset.x = offset.x * OFFSET_START;
				currentOffset.y += offset.y;
			}
			
			blur /= ( GRID_SIZE * GRID_SIZE );

			return lerp( clean, blur, indata.col.a );
		}
	%> }
}

renderProgram guiBlur_4x4 {
	program vertex cg { <%
		struct VsInputs {
			float3 pos	: $positionAttrib;
			float2 tex	: $texCoordAttrib;
			float4 col	: $colorAttrib;
		};

		struct VsOutputs {
			float2 texCoord0	: TEXCOORD0;
			float4 col			: COLOR0;
		};

		float2 screenSize : $currentRenderTexelSize;
		
		VsOutputs vertex( VsInputs indata ) {
			VsOutputs outdata;

			$if r_32ByteVtx
			indata.tex *= 1.0f / 4096.0f;
			$endif

			float2 coord = indata.tex.xy;
			coord.y = 1.0f - coord.y;

			outdata.texCoord0 = coord * screenSize;
			outdata.col = indata.col;

			return outdata;
		}
	%> }

	program fragment cg { <%
		struct VsOutputs {
			float2 texCoord0	: TEXCOORD0;
			float4 col			: COLOR0;
		};

		samplerRECT framebuffer : $currentRender;

		#define OFFSET_START -2
		#define GRID_SIZE 4
		
		float4 fragment( VsOutputs indata ) : COLOR {
			// this is the number of pixels between grid squares, increase to expand blur grid area
			float2 offset = float2( 2.2f, 2.2f );
			float4 blur = 0.0f;
			float2 currentOffset = offset * OFFSET_START;

			for ( int y = 0; y < GRID_SIZE; y++ ) {
				for ( int x = 0; x < GRID_SIZE; x++ ) {
					blur += texRECT( framebuffer, indata.texCoord0 + currentOffset );
					currentOffset.x += offset.x;
				}
				
				currentOffset.x = offset.x * OFFSET_START;
				currentOffset.y += offset.y;
			}
			
			blur /= ( GRID_SIZE * GRID_SIZE );

			return blur;
		}
	%> }
}