Commands/Shaders/Get-OBSInvertLumaShader.ps1
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function Get-OBSInvertLumaShader { [Alias('Set-OBSInvertLumaShader','Add-OBSInvertLumaShader')] param( # Set the Invert_Color of OBSInvertLumaShader [Alias('Invert_Color')] [ComponentModel.DefaultBindingProperty('Invert_Color')] [Management.Automation.SwitchParameter] $InvertColor, # Set the Invert_Luma of OBSInvertLumaShader [Alias('Invert_Luma')] [ComponentModel.DefaultBindingProperty('Invert_Luma')] [Management.Automation.SwitchParameter] $InvertLuma, # Set the Gamma_Correction of OBSInvertLumaShader [Alias('Gamma_Correction')] [ComponentModel.DefaultBindingProperty('Gamma_Correction')] [Management.Automation.SwitchParameter] $GammaCorrection, # Set the Test_Ramp of OBSInvertLumaShader [Alias('Test_Ramp')] [ComponentModel.DefaultBindingProperty('Test_Ramp')] [Management.Automation.SwitchParameter] $TestRamp, # The name of the source. This must be provided when adding an item for the first time [Parameter(ValueFromPipelineByPropertyName)] [Alias('SceneItemName')] [String] $SourceName, # The name of the filter. If this is not provided, this will default to the shader name. [Parameter(ValueFromPipelineByPropertyName)] [String] $FilterName, # The inline value of the shader. This will normally be provided as a default parameter, based off of the name. [Alias('ShaderContent')] [String] $ShaderText, # If set, will force the recreation of a shader that already exists [Management.Automation.SwitchParameter] $Force, # If set, will pass thru the commands that would be sent to OBS (these can be sent at any time with Send-OBS) [Management.Automation.SwitchParameter] $PassThru, # If set, will not wait for a response from OBS (this will be faster, but will not return anything) [Management.Automation.SwitchParameter] $NoResponse, # If set, use the shader elapsed time, instead of the OBS system elapsed time [ComponentModel.DefaultBindingProperty('use_shader_elapsed_time')] [Management.Automation.SwitchParameter] $UseShaderTime ) process { $shaderName = 'invert-luma' $ShaderNoun = 'OBSInvertLumaShader' if (-not $psBoundParameters['ShaderText']) { $psBoundParameters['ShaderText'] = $ShaderText = ' // Invert shader 1.0 - for OBS Shaderfilter // Copyright 2021 by SkeletonBow // https://twitter.com/skeletonbowtv // https://twitch.tv/skeletonbowtv // Performs RGB color inversion or YUV luma inversion with optional sRGB gamma handling uniform bool Invert_Color = false; uniform bool Invert_Luma = true; uniform bool Gamma_Correction = true; uniform bool Test_Ramp = false; float3 encodeSRGB(float3 linearRGB) { float3 a = float3(12.92,12.92,12.92) * linearRGB; float3 b = float3(1.055,1.055,1.055) * pow(linearRGB, float3(1.0 / 2.4,1.0 / 2.4,1.0 / 2.4)) - float3(0.055,0.055,0.055); float3 c = step(float3(0.0031308,0.0031308,0.0031308), linearRGB); return float3(lerp(a, b, c)); } float3 decodeSRGB(float3 screenRGB) { float3 a = screenRGB / float3(12.92,12.92,12.92); float3 b = pow((screenRGB + float3(0.055,0.055,0.055)) / float3(1.055,1.055,1.055), float3(2.4,2.4,2.4)); float3 c = step(float3(0.04045,0.04045,0.04045), screenRGB); return float3(lerp(a, b, c)); } float3 HUEtoRGB(in float H) { float R = abs(H * 6 - 3) - 1; float G = 2 - abs(H * 6 - 2); float B = 2 - abs(H * 6 - 4); return float3(clamp(float3(R,G,B), float3(0.0, 0.0, 0.0), float3(1.0, 1.0, 1.0))); } float3 RGBtoYUV(float3 color) { // YUV matriz (BT709 luma coefficients) #ifdef OPENGL float3x3 toYUV = float3x3( float3(0.2126, -0.09991, 0.615), float3(0.7152, -0.33609, -0.55861), float3(0.0722, 0.436, -0.05639)); #else float3x3 toYUV = { { 0.2126, -0.09991, 0.615 }, { 0.7152, -0.33609, -0.55861 }, { 0.0722, 0.436, -0.05639 }, }; #endif return mul(color, toYUV); } float3 YUVtoRGB(float3 color) { // YUV matriz (BT709) #ifdef OPENGL float3x3 fromYUV = float3x3( float3(1.000, 1.000, 1.000), float3(0.0, -0.21482, 2.12798), float3(1.28033, -0.38059, 0.0)); #else float3x3 fromYUV = { { 1.000, 1.000, 1.000 }, { 0.0, -0.21482, 2.12798 }, { 1.28033, -0.38059, 0.0 }, }; #endif return mul(color, fromYUV); } float3 generate_ramps(float3 color, float2 uv) { float3 ramp = float3(0.0, 0.0, 0.0); if(uv.y < 0.2) ramp.r = uv.x; // Red ramp else if(uv.y < 0.4) ramp.g = uv.x; // Green ramp else if(uv.y < 0.6) ramp.b = uv.x; // Blue ramp else if(uv.y < 0.8) ramp = float3(uv.x, uv.x, uv.x); // Grey ramp else ramp = HUEtoRGB(uv.x); // Hue rainbow return ramp; } float4 mainImage( VertData v_in ) : TARGET { float2 uv = v_in.uv; float4 obstex = image.Sample( textureSampler, uv ); float3 color = obstex.rgb; // Apply sRGB gamma transfer encode if(Gamma_Correction) color = encodeSRGB( color ); // Override display with test patterns to visually see what is happening if( Test_Ramp ) color = generate_ramps( obstex.rgb, uv ); // RGB color invert if( Invert_Color ) { color = float3(1.0, 1.0, 1.0) - color; } // YUV luma invert if( Invert_Luma ) { float3 yuv = RGBtoYUV( color ); yuv.x = 1.0 - yuv.x; color = YUVtoRGB(yuv); } // Apply sRGB gamma transfer decode if(Gamma_Correction) color = decodeSRGB( color ); return float4(color, obstex.a); } ' } $MyVerb, $myNoun = $MyInvocation.InvocationName -split '-',2 if (-not $myNoun) { $myNoun = $myVerb $myVerb = 'Get' } switch -regex ($myVerb) { Get { $FilterNamePattern = "(?>$( if ($FilterName) { [Regex]::Escape($FilterName) } else { [Regex]::Escape($ShaderNoun -replace '^OBS' -replace 'Shader$'),[Regex]::Escape($shaderName) -join '|' } ))" if ($SourceName) { Get-OBSInput | Where-Object InputName -eq $SourceName | Get-OBSSourceFilterList | Where-Object FilterName -Match $FilterNamePattern } else { $obs.Inputs | Get-OBSSourceFilterList | Where-Object FilterName -Match $FilterNamePattern } } 'Remove' { if ($SourceName) { Get-OBSInput | Where-Object InputName -eq $SourceName | Get-OBSSourceFilterList | Where-Object FilterName -Match $FilterNamePattern | Remove-OBSSourceFilter } } '(?>Add|Set)' { $ShaderSettings = [Ordered]@{} :nextParameter foreach ($parameterMetadata in $MyInvocation.MyCommand.Parameters[@($psBoundParameters.Keys)]) { foreach ($parameterAttribute in $parameterMetadata.Attributes) { if ($parameterAttribute -isnot [ComponentModel.DefaultBindingPropertyAttribute]) { continue } $ShaderSettings[$parameterAttribute.Name] = $PSBoundParameters[$parameterMetadata.Name] if ($ShaderSettings[$parameterAttribute.Name] -is [switch]) { $ShaderSettings[$parameterAttribute.Name] = $ShaderSettings[$parameterAttribute.Name] -as [bool] } continue nextParameter } } if (-not $PSBoundParameters['FilterName']) { $filterName = $PSBoundParameters['FilterName'] = $shaderName } $ShaderFilterSplat = [Ordered]@{ ShaderSetting = $ShaderSettings FilterName = $FilterName SourceName = $SourceName } foreach ($CarryOnParameter in "PassThru", "NoResponse","Force") { if ($PSBoundParameters.ContainsKey($CarryOnParameter)) { $ShaderFilterSplat[$CarryOnParameter] = $PSBoundParameters[$CarryOnParameter] } } if (-not $script:CachedShaderFilesFromCommand) { $script:CachedShaderFilesFromCommand = @{} } if ($Home -and -not $script:CachedShaderFilesFromCommand[$shaderName]) { $MyObsPowerShellPath = Join-Path $home ".obs-powershell" $ThisShaderPath = Join-Path $MyObsPowerShellPath "$shaderName.shader" $shaderText | Set-Content -LiteralPath $ThisShaderPath $script:CachedShaderFilesFromCommand[$shaderName] = Get-Item -LiteralPath $ThisShaderPath } if ($script:CachedShaderFilesFromCommand[$shaderName]) { $ShaderFilterSplat.ShaderFile = $script:CachedShaderFilesFromCommand[$shaderName].FullName } else { $ShaderFilterSplat.ShaderText = $shaderText } if ($myVerb -eq 'Add') { Add-OBSShaderFilter @ShaderFilterSplat } else { Set-OBSShaderFilter @ShaderFilterSplat } } } } } |