fix(Material): sRGB decoding for VideoTexture .emissiveMap (#29657)

src/renderers/shaders/ShaderChunk/colorspace_pars_fragment.glsl.js

@@ -4,6 +4,10 @@ vec4 LinearTransferOETF( in vec4 value ) {
 	return value;
 }
 
+vec4 sRGBTransferEOTF( in vec4 value ) {
+	return vec4( mix( pow( value.rgb * 0.9478672986 + vec3( 0.0521327014 ), vec3( 2.4 ) ), value.rgb * 0.0773993808, vec3( lessThanEqual( value.rgb, vec3( 0.04045 ) ) ) ), value.a );
+}
+
 vec4 sRGBTransferOETF( in vec4 value ) {
 	return vec4( mix( pow( value.rgb, vec3( 0.41666 ) ) * 1.055 - vec3( 0.055 ), value.rgb * 12.92, vec3( lessThanEqual( value.rgb, vec3( 0.0031308 ) ) ) ), value.a );
 }

src/renderers/shaders/ShaderChunk/emissivemap_fragment.glsl.js

@@ -3,6 +3,14 @@ export default /* glsl */`
 
 	vec4 emissiveColor = texture2D( emissiveMap, vEmissiveMapUv );
 
+	#ifdef DECODE_VIDEO_TEXTURE_EMISSIVE
+
+		// use inline sRGB decode until browsers properly support SRGB8_ALPHA8 with video textures (#26516)
+
+		emissiveColor = sRGBTransferEOTF( emissiveColor );
+
+	#endif
+
 	totalEmissiveRadiance *= emissiveColor.rgb;
 
 #endif

src/renderers/shaders/ShaderChunk/map_fragment.glsl.js

@@ -7,8 +7,8 @@ export default /* glsl */`
 
 		// use inline sRGB decode until browsers properly support SRGB8_ALPHA8 with video textures (#26516)
 
-		sampledDiffuseColor = vec4( mix( pow( sampledDiffuseColor.rgb * 0.9478672986 + vec3( 0.0521327014 ), vec3( 2.4 ) ), sampledDiffuseColor.rgb * 0.0773993808, vec3( lessThanEqual( sampledDiffuseColor.rgb, vec3( 0.04045 ) ) ) ), sampledDiffuseColor.w );
-	
+		sampledDiffuseColor = sRGBTransferEOTF( sampledDiffuseColor );
+
 	#endif
 
 	diffuseColor *= sampledDiffuseColor;

src/renderers/webgl/WebGLProgram.js

@@ -816,6 +816,7 @@ function WebGLProgram( renderer, cacheKey, parameters, bindingStates ) {
 			parameters.numLightProbes > 0 ? '#define USE_LIGHT_PROBES' : '',
 
 			parameters.decodeVideoTexture ? '#define DECODE_VIDEO_TEXTURE' : '',
+			parameters.decodeVideoTextureEmissive ? '#define DECODE_VIDEO_TEXTURE_EMISSIVE' : '',
 
 			parameters.logarithmicDepthBuffer ? '#define USE_LOGDEPTHBUF' : '',
 			parameters.reverseDepthBuffer ? '#define USE_REVERSEDEPTHBUF' : '',

src/renderers/webgl/WebGLPrograms.js

@@ -341,6 +341,7 @@ function WebGLPrograms( renderer, cubemaps, cubeuvmaps, extensions, capabilities
 			toneMapping: toneMapping,
 
 			decodeVideoTexture: HAS_MAP && ( material.map.isVideoTexture === true ) && ( ColorManagement.getTransfer( material.map.colorSpace ) === SRGBTransfer ),
+			decodeVideoTextureEmissive: HAS_EMISSIVEMAP && ( material.emissiveMap.isVideoTexture === true ) && ( ColorManagement.getTransfer( material.emissiveMap.colorSpace ) === SRGBTransfer ),
 
 			premultipliedAlpha: material.premultipliedAlpha,
 
@@ -558,8 +559,10 @@ function WebGLPrograms( renderer, cubemaps, cubeuvmaps, extensions, capabilities
 			_programLayers.enable( 18 );
 		if ( parameters.decodeVideoTexture )
 			_programLayers.enable( 19 );
-		if ( parameters.alphaToCoverage )
+		if ( parameters.decodeVideoTextureEmissive )
 			_programLayers.enable( 20 );
+		if ( parameters.alphaToCoverage )
+			_programLayers.enable( 21 );
 
 		array.push( _programLayers.mask );