Nodes: Add general Combine/Separate Color nodes

Inspired by D12936 and D12929, this patch adds general purpose
"Combine Color" and "Separate Color" nodes to Geometry, Compositor,
Shader and Texture nodes.
- Within Geometry Nodes, it replaces the existing "Combine RGB" and
  "Separate RGB" nodes.
- Within Compositor Nodes, it replaces the existing
  "Combine RGBA/HSVA/YCbCrA/YUVA" and "Separate RGBA/HSVA/YCbCrA/YUVA"
  nodes.
- Within Texture Nodes, it replaces the existing "Combine RGBA" and
  "Separate RGBA" nodes.
- Within Shader Nodes, it replaces the existing "Combine RGB/HSV" and
  "Separate RGB/HSV" nodes.

Python addons have not been updated to the new nodes yet.

**New shader code**
In node_color.h, color.h and gpu_shader_material_color_util.glsl,
missing methods hsl_to_rgb and rgb_to_hsl are added by directly
converting existing C code. They always produce the same result.

**Old code**
As requested by T96219, old nodes still exist but are not displayed in
the add menu. This means Python scripts can still create them as usual.
Otherwise, versioning replaces the old nodes with the new nodes when
opening .blend files.

Differential Revision: https://developer.blender.org/D14034

1 files changed, 16 insertions, 8 deletions

diff --git a/source/blender/compositor/intern/COM_Converter.cc b/source/blender/compositor/intern/COM_Converter.cc
index 13d412a338b..6d7341376e9 100644
--- a/source/blender/compositor/intern/COM_Converter.cc
+++ b/source/blender/compositor/intern/COM_Converter.cc
@@ -29,6 +29,7 @@
 #include "COM_ColorSpillNode.h"
 #include "COM_ColorToBWNode.h"
 #include "COM_CombineColorNode.h"
+#include "COM_CombineColorNodeLegacy.h"
 #include "COM_CombineXYZNode.h"
 #include "COM_CompositorNode.h"
 #include "COM_ConvertAlphaNode.h"
@@ -82,6 +83,7 @@
 #include "COM_ScaleOperation.h"
 #include "COM_SceneTimeNode.h"
 #include "COM_SeparateColorNode.h"
+#include "COM_SeparateColorNodeLegacy.h"
 #include "COM_SeparateXYZNode.h"
 #include "COM_SetAlphaNode.h"
 #include "COM_SetValueOperation.h"
@@ -169,28 +171,34 @@ Node *COM_convert_bnode(bNode *b_node)
     case CMP_NODE_BRIGHTCONTRAST:
       node = new BrightnessNode(b_node);
       break;
-    case CMP_NODE_SEPRGBA:
+    case CMP_NODE_SEPARATE_COLOR:
+      node = new SeparateColorNode(b_node);
+      break;
+    case CMP_NODE_COMBINE_COLOR:
+      node = new CombineColorNode(b_node);
+      break;
+    case CMP_NODE_SEPRGBA_LEGACY:
       node = new SeparateRGBANode(b_node);
       break;
-    case CMP_NODE_COMBRGBA:
+    case CMP_NODE_COMBRGBA_LEGACY:
       node = new CombineRGBANode(b_node);
       break;
-    case CMP_NODE_SEPHSVA:
+    case CMP_NODE_SEPHSVA_LEGACY:
       node = new SeparateHSVANode(b_node);
       break;
-    case CMP_NODE_COMBHSVA:
+    case CMP_NODE_COMBHSVA_LEGACY:
       node = new CombineHSVANode(b_node);
       break;
-    case CMP_NODE_SEPYUVA:
+    case CMP_NODE_SEPYUVA_LEGACY:
       node = new SeparateYUVANode(b_node);
       break;
-    case CMP_NODE_COMBYUVA:
+    case CMP_NODE_COMBYUVA_LEGACY:
       node = new CombineYUVANode(b_node);
       break;
-    case CMP_NODE_SEPYCCA:
+    case CMP_NODE_SEPYCCA_LEGACY:
       node = new SeparateYCCANode(b_node);
       break;
-    case CMP_NODE_COMBYCCA:
+    case CMP_NODE_COMBYCCA_LEGACY:
       node = new CombineYCCANode(b_node);
       break;
     case CMP_NODE_ALPHAOVER: