RenderPassEditor : Render pass creation and deletion

Changes.md

@@ -6,6 +6,10 @@ Improvements
 
 - SceneReader : Added basic loding of UsdGeomNurbsCurves, converting them to CurvesPrimitives (basis curves).
 - Console output : Every line is now prefixed with the message level.
+- RenderPasses : Added validation of render pass names entered in the `names` plug.
+- RenderPassEditor :
+  - Added support for adding a new render pass to an EditScope by clicking the plus button at the bottom of the editor.
+  - Added support for deleting selected render passes by clicking the minus button at the bottom of the editor, or by right-clicking one of the names and selecting 'Delete Selected Render Passes'.
 
 Fixes
 -----
@@ -25,6 +29,14 @@ Documentation
 - Added Render Pass Editor shortcuts to the "Controls and Shortcuts" section.
 - Added Render Pass Editor (Arnold) example demonstrating use of the Render Pass Editor, as well as the RenderPasses and RenderPassWedge nodes.
 
+API
+---
+
+- EditScopeAlgo : Added support for creating render passes.
+- RenderPasses : Added `registerRenderPassNameWidget()` and `createRenderPassNameWidget()` methods for registration and creation of the widget used for editing render pass names.
+- RenderPassEditor : Added `addRenderPassButtonMenuSignal()` to allow customisation of the add render pass button behaviour.
+- ConfirmationDialogue : The cancel button may now be omitted by passing `cancelLabel = None` to the constructor.
+
 Build
 -----
 

include/GafferScene/EditScopeAlgo.h

@@ -160,6 +160,8 @@ GAFFERSCENE_API Gaffer::TweakPlug *acquireRenderPassOptionEdit( Gaffer::EditScop
 GAFFERSCENE_API void removeRenderPassOptionEdit( Gaffer::EditScope *scope, const std::string &renderPass, const std::string &option );
 GAFFERSCENE_API const Gaffer::GraphComponent *renderPassOptionEditReadOnlyReason( const Gaffer::EditScope *scope, const std::string &renderPass, const std::string &option );
 
+GAFFERSCENE_API const Gaffer::GraphComponent *renderPassesReadOnlyReason( const Gaffer::EditScope *scope );
+
 } // namespace EditScopeAlgo
 
 } // namespace GafferScene

python/GafferSceneTest/EditScopeAlgoTest.py

@@ -1653,5 +1653,60 @@ def testOptionEditFromDefaultValueMetadata( self ) :
 		self.assertIsNotNone( GafferScene.EditScopeAlgo.acquireOptionEdit( editScope, "test:bogus" ) )
 		self.assertNotEqual( editScope.keys(), emptyKeys )
 
+	def testRenderPassesReadOnlyReason( self ) :
+
+		s = Gaffer.ScriptNode()
+
+		s["cube"] = GafferScene.Cube()
+
+		s["scope"] = Gaffer.EditScope()
+		s["scope"].setup( s["cube"]["out"] )
+		s["scope"]["in"].setInput( s["cube"]["out"] )
+
+		s["box"] = Gaffer.Box.create( s, Gaffer.StandardSet( [ s["cube"], s["scope"] ] ) )
+
+		self.assertIsNone( GafferScene.EditScopeAlgo.renderPassesReadOnlyReason( s["box"]["scope"] ) )
+
+		for component in ( s["box"], s["box"]["scope"] ):
+			Gaffer.MetadataAlgo.setReadOnly( component, True )
+			self.assertEqual( GafferScene.EditScopeAlgo.renderPassesReadOnlyReason( s["box"]["scope"] ), s["box"] )
+
+		Gaffer.MetadataAlgo.setReadOnly( s["box"], False )
+		self.assertEqual( GafferScene.EditScopeAlgo.renderPassesReadOnlyReason( s["box"]["scope"] ), s["box"]["scope"] )
+
+		Gaffer.MetadataAlgo.setReadOnly( s["box"]["scope"], False )
+		renderPasses = s["box"]["scope"].acquireProcessor( "RenderPasses", createIfNecessary = True )
+		renderPasses["names"].setValue( IECore.StringVectorData( [ "renderPassA" ] ) )
+
+		self.assertIsNone( GafferScene.EditScopeAlgo.renderPassesReadOnlyReason( s["box"]["scope"] ) )
+
+		for component in (
+			s["box"]["scope"]["RenderPasses"]["names"],
+			s["box"]["scope"]["RenderPasses"],
+			s["box"]["scope"],
+			s["box"]
+		) :
+			Gaffer.MetadataAlgo.setReadOnly( component, True )
+			self.assertEqual( GafferScene.EditScopeAlgo.renderPassesReadOnlyReason( s["box"]["scope"] ), component )
+
+	def testRenderPassesSerialisation( self ) :
+
+		s = Gaffer.ScriptNode()
+
+		s["plane"] = GafferScene.Plane()
+
+		s["editScope"] = Gaffer.EditScope()
+		s["editScope"].setup( s["plane"]["out"] )
+
+		renderPasses = s["editScope"].acquireProcessor( "RenderPasses", createIfNecessary = True )
+		renderPasses["names"].setValue( IECore.StringVectorData( [ "renderPassA" ] ) )
+
+		self.assertEqual( s["editScope"]["out"]["globals"].getValue().get( "option:renderPass:names" ), IECore.StringVectorData( [ "renderPassA" ] ) )
+
+		s2 = Gaffer.ScriptNode()
+		s2.execute( s.serialise() )
+
+		self.assertEqual( s2["editScope"]["out"]["globals"].getValue().get( "option:renderPass:names" ), IECore.StringVectorData( [ "renderPassA" ] ) )
+
 if __name__ == "__main__":
 	unittest.main()