fix(nuke): ColorReplace: should use sRGB color in autolabel

plugins/Color/ColorReplace.gizmo

@@ -4,12 +4,23 @@ Group {
  name ColorReplace1
  tile_color 0x7aa9ffff
  onCreate {
-class __ColorReplace_f6d7a71b4413:
+class __ColorReplace_0d3e34f43027:
     _COLOR_COUNT = 16
 
+    @classmethod
+    def _linear_to_srgb(cls, v):
+        if v <= 0.0:
+            return 0.0
+        elif v >= 1:
+            return 1.0
+        elif v < 0.0031308:
+            return v * 12.92
+        else:
+            return v ** (1 / 2.4) * 1.055 - 0.055
+
     @classmethod
     def _hex_color(cls, color):
-        return "#" + "".join(("%02X" % max(0, min(255, round(i*255))) for i in color))
+        return "#" + "".join(("%02X" % int(cls._linear_to_srgb(i)*255)) for i in color)
 
     @classmethod
     def _color(cls, index):
@@ -64,11 +75,11 @@ class __ColorReplace_f6d7a71b4413:
                     continue
                 k.setVisible(visible)
 
-__ColorReplace_f6d7a71b4413.update_ui()
+__ColorReplace_0d3e34f43027.update_ui()
  }
- autolabel __ColorReplace_f6d7a71b4413.autolabel()
- updateUI __ColorReplace_f6d7a71b4413.update_ui()
- addUserKnob {20 ColorReplace l "ColorReplace v0.1.2"}
+ autolabel __ColorReplace_0d3e34f43027.autolabel()
+ updateUI __ColorReplace_0d3e34f43027.update_ui()
+ addUserKnob {20 ColorReplace l "ColorReplace v0.1.3"}
  addUserKnob {26 color1 l "" +STARTLINE T color1}
  addUserKnob {1 label1 l "" -STARTLINE}
  addUserKnob {41 src1 l src T Expression1.src}

wulifang/_util/__init__.py

@@ -44,3 +44,4 @@
 from ._clamp import clamp
 from ._hex_color import hex_color
 from ._iter_chunk import iter_chunk
+from ._linear_to_srgb import linear_to_srgb

wulifang/_util/_linear_to_srgb.py

@@ -0,0 +1,17 @@
+# -*- coding=UTF-8 -*-
+# pyright: strict, reportTypeCommentUsage=none
+
+from __future__ import absolute_import, division, print_function, unicode_literals
+
+
+def linear_to_srgb(__v):
+    # type: (float) -> float
+    # https://www.nayuki.io/res/srgb-transform-library/srgbtransform.py
+    if __v <= 0.0:
+        return 0.0
+    elif __v >= 1:
+        return 1.0
+    elif __v < 0.0031308:
+        return __v * 12.92
+    else:
+        return __v ** (1 / 2.4) * 1.055 - 0.055