Added Alpha Association filter node

addons/material_maker/nodes/alpha_association.mmg

@@ -0,0 +1,59 @@
+{
+	"generic_size": 1,
+	"name": "alpha_association",
+	"node_position": {
+		"x": 0,
+		"y": 0
+	},
+	"parameters": {
+		"mode": 1.0
+	},
+	"seed_int": 0,
+	"shader_model": {
+		"code": "",
+		"global": "",
+		"inputs": [
+			{
+				"default": "vec4(0.0, 0.0, 0.0, 1.0)",
+				"label": "",
+				"longdesc": "The image to be converted",
+				"name": "in#",
+				"shortdesc": "Input#",
+				"type": "rgba"
+			}
+		],
+		"instance": "",
+		"longdesc": "Converts an input image from straight to premultiplied alpha and vice versa",
+		"name": "Alpha Association",
+		"outputs": [
+			{
+				"longdesc": "The converted image",
+				"rgba": "vec4($in#($uv).rgb $mode $in#($uv).a, $in#($uv).a)",
+				"shortdesc": "Output#",
+				"type": "rgba"
+			}
+		],
+		"parameters": [
+			{
+				"default": 0.0,
+				"label": "",
+				"name": "mode",
+				"shortdesc": "Mode",
+				"longdesc": "Controls whether the node converts from straight to premultiplied or from premultiplied to straight",
+				"type": "enum",
+				"values": [
+					{
+						"name": "Straight to Premultiplied",
+						"value": "*"
+					},
+					{
+						"name": "Premultiplied to Straight",
+						"value": "/"
+					}
+				]
+			}
+		],
+		"shortdesc": "Alpha Association Conversion"
+	},
+	"type": "shader"
+}

material_maker/doc/node_filter_alpha_association.rst

@@ -0,0 +1,24 @@
+Alpha Association node
+~~~~~~~~~~~~~~~~~~~~~~
+
+The **Alpha Association** node is variadic and converts the input images' alpha association
+from straight to premultiplied and vice versa. The alpha channel remains untouched.
+
+.. image:: images/node_filter_alpha_association.png
+	:align: center
+
+Inputs
+++++++
+
+The **Alpha Association** node requires an RGBA input texture.
+
+Outputs
++++++++
+
+The **Alpha Association** node provides a single RGBA texture.
+
+Parameters
+++++++++++
+
+The **Alpha Association** node has a single **Mode** parameter to select between
+converting from straight to premultiplied and from premultiplied to straight.

material_maker/doc/nodes_filter.rst

@@ -68,3 +68,4 @@ The filter nodes accept one or several inputs and generate one or several images
 	node_filter_classic_kuwahara
 	node_filter_generalized_kuwahara
 	node_filter_symmetric_nearest_neighbor
+	node_filter_alpha_association

material_maker/library/base.json

@@ -7962,6 +7962,15 @@
 			"tree_item": "3D/SDF/Shapes/Octahedron",
 			"type": "sdf3d_octahedron"
 		},
+		{
+			"display_name": "Alpha Association",
+			"name": "alpha_association",
+			"parameters": {
+				"mode": 0.0
+			},
+			"tree_item": "Filter/Alpha Association",
+			"type": "alpha_association"
+		},
 		{
 			"display_name": "Inverse Circle Map",
 			"icon_data": "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",