From d1042cbfc7b33f684d45c36fe7492995a28dd2ed Mon Sep 17 00:00:00 2001
From: Don McCurdy <dm@donmccurdy.com>
Date: Thu, 24 Aug 2023 16:08:12 -0400
Subject: [PATCH] WIP: Display P3 render example

---
 examples/files.json         |  1 +
 src/math/ColorManagement.js | 30 +++++++++++++++++++++++-------
 2 files changed, 24 insertions(+), 7 deletions(-)

diff --git a/examples/files.json b/examples/files.json
index 8dfa83ef7e2ece..73fba1cdf2f222 100644
--- a/examples/files.json
+++ b/examples/files.json
@@ -213,6 +213,7 @@
 		"webgl_sprites",
 		"webgl_test_memory",
 		"webgl_test_memory2",
+		"webgl_test_wide_gamut",
 		"webgl_tonemapping",
 		"webgl_video_kinect",
 		"webgl_video_panorama_equirectangular",
diff --git a/src/math/ColorManagement.js b/src/math/ColorManagement.js
index d15d3d3539c98e..f928ebc6108b47 100644
--- a/src/math/ColorManagement.js
+++ b/src/math/ColorManagement.js
@@ -1,4 +1,4 @@
-import { SRGBColorSpace, LinearSRGBColorSpace, DisplayP3ColorSpace, } from '../constants.js';
+import { SRGBColorSpace, LinearSRGBColorSpace, DisplayP3ColorSpace, LinearDisplayP3ColorSpace, } from '../constants.js';
 import { Matrix3 } from './Matrix3.js';
 
 export function SRGBToLinear( c ) {
@@ -51,24 +51,40 @@ function LinearSRGBToDisplayP3( color ) {
 
 }
 
+function LinearDisplayP3ToLinearSRGB( color ) {
+
+	return color.applyMatrix3( LINEAR_DISPLAY_P3_TO_LINEAR_SRGB );
+
+}
+
+function LinearSRGBToLinearDisplayP3( color ) {
+
+	return color.applyMatrix3( LINEAR_SRGB_TO_LINEAR_DISPLAY_P3 );
+
+}
+
 // Conversions from <source> to Linear-sRGB reference space.
-const TO_LINEAR = {
+const TO_REFERENCE = {
 	[ LinearSRGBColorSpace ]: ( color ) => color,
 	[ SRGBColorSpace ]: ( color ) => color.convertSRGBToLinear(),
 	[ DisplayP3ColorSpace ]: DisplayP3ToLinearSRGB,
+	[ LinearDisplayP3ColorSpace ]: LinearDisplayP3ToLinearSRGB,
 };
 
 // Conversions to <target> from Linear-sRGB reference space.
-const FROM_LINEAR = {
+const FROM_REFERENCE = {
 	[ LinearSRGBColorSpace ]: ( color ) => color,
 	[ SRGBColorSpace ]: ( color ) => color.convertLinearToSRGB(),
 	[ DisplayP3ColorSpace ]: LinearSRGBToDisplayP3,
+	[ LinearDisplayP3ColorSpace ]: LinearSRGBToLinearDisplayP3,
 };
 
 export const ColorManagement = {
 
 	enabled: true,
 
+	_workingColorSpace: LinearSRGBColorSpace,
+
 	get legacyMode() {
 
 		console.warn( 'THREE.ColorManagement: .legacyMode=false renamed to .enabled=true in r150.' );
@@ -87,13 +103,13 @@ export const ColorManagement = {
 
 	get workingColorSpace() {
 
-		return LinearSRGBColorSpace;
+		return this._workingColorSpace;
 
 	},
 
 	set workingColorSpace( colorSpace ) {
 
-		console.warn( 'THREE.ColorManagement: .workingColorSpace is readonly.' );
+		this._workingColorSpace = colorSpace;
 
 	},
 
@@ -105,8 +121,8 @@ export const ColorManagement = {
 
 		}
 
-		const sourceToLinear = TO_LINEAR[ sourceColorSpace ];
-		const targetFromLinear = FROM_LINEAR[ targetColorSpace ];
+		const sourceToLinear = TO_REFERENCE[ sourceColorSpace ];
+		const targetFromLinear = FROM_REFERENCE[ targetColorSpace ];
 
 		if ( sourceToLinear === undefined || targetFromLinear === undefined ) {