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, 2 insertions, 0 deletions

diff --git a/source/blender/nodes/NOD_function.h b/source/blender/nodes/NOD_function.h
index cde4b67e120..ad96fba1929 100644
--- a/source/blender/nodes/NOD_function.h
+++ b/source/blender/nodes/NOD_function.h
@@ -8,6 +8,7 @@ extern "C" {
 
 void register_node_type_fn_align_euler_to_vector(void);
 void register_node_type_fn_boolean_math(void);
+void register_node_type_fn_combine_color(void);
 void register_node_type_fn_compare(void);
 void register_node_type_fn_float_to_int(void);
 void register_node_type_fn_input_bool(void);
@@ -19,6 +20,7 @@ void register_node_type_fn_input_vector(void);
 void register_node_type_fn_random_value(void);
 void register_node_type_fn_replace_string(void);
 void register_node_type_fn_rotate_euler(void);
+void register_node_type_fn_separate_color(void);
 void register_node_type_fn_slice_string(void);
 void register_node_type_fn_string_length(void);
 void register_node_type_fn_value_to_string(void);