feat: Zoom XY Shader ( Fixes #199 )

Commands/Shaders/Get-OBSZoomXYShader.ps1

@@ -0,0 +1,197 @@
+function Get-OBSZoomXYShader {
+
+[Alias('Set-OBSZoomXYShader','Add-OBSZoomXYShader')]
+param(
+# Set the center_x_percent of OBSZoomXYShader
+[Alias('center_x_percent')]
+[ComponentModel.DefaultBindingProperty('center_x_percent')]
+[Int32]
+$CenterXPercent,
+# Set the center_y_percent of OBSZoomXYShader
+[Alias('center_y_percent')]
+[ComponentModel.DefaultBindingProperty('center_y_percent')]
+[Int32]
+$CenterYPercent,
+# Set the x_power of OBSZoomXYShader
+[Alias('x_power')]
+[ComponentModel.DefaultBindingProperty('x_power')]
+[Single]
+$XPower,
+# Set the y_power of OBSZoomXYShader
+[Alias('y_power')]
+[ComponentModel.DefaultBindingProperty('y_power')]
+[Single]
+$YPower,
+# 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 = 'Zoom_XY'
+$ShaderNoun = 'OBSZoomXYShader'
+if (-not $psBoundParameters['ShaderText']) {    
+    $psBoundParameters['ShaderText'] = $ShaderText = '
+// Zoom XY Shader
+
+// A simple twist on the Zoom Shader in https://github.com/exeldro/obs-shaderfilter/
+
+// The allow for an independent Horizontal and Vertical Zoom.
+
+uniform int center_x_percent<
+    string label = "center x percent";
+    string widget_type = "slider";
+    int minimum = 0;
+    int maximum = 100;
+    int step = 1;
+> = 50;
+uniform int center_y_percent<
+    string label = "center y percent";
+    string widget_type = "slider";
+    int minimum = 0;
+    int maximum = 100;
+    int step = 1;
+> = 50;
+uniform float x_power<
+    string label = "x power";
+    string widget_type = "slider";
+    float minimum = 0;
+    float maximum = 20.0;
+    float step = 0.001;
+> = 1;
+
+uniform float y_power<
+    string label = "y power";
+    string widget_type = "slider";
+    float minimum = 0;
+    float maximum = 20.0;
+    float step = 0.001;
+> = 1;
+
+float4 mainImage(VertData v_in) : TARGET
+{
+    float2 center_pos = float2(center_x_percent * .01, center_y_percent * .01);
+    float2 uv = v_in.uv;
+    uv.x = (v_in.uv.x - center_pos.x) * x_power +  center_pos.x;
+    uv.y = (v_in.uv.y - center_pos.y) * y_power +  center_pos.y;
+    return image.Sample(textureSampler, uv);
+}
+'
+}
+$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
+        }
+    }
+}
+
+}
+
+
+} 
+