WebGLTextures: Clean up.

src/renderers/webgl/WebGLTextures.js

@@ -137,12 +137,10 @@ function WebGLTextures( _gl, extensions, state, properties, capabilities, utils,
 
 	}
 
-	function getInternalFormat( texture, glFormat, glType ) {
+	function getInternalFormat( internalFormatName, glFormat, glType ) {
 
 		if ( isWebGL2 === false ) return glFormat;
 
-		var internalFormatName = texture.internalFormat; // User specified internal format.
-
 		if ( internalFormatName !== null ) {
 
 			if ( _gl[ internalFormatName ] !== undefined ) return _gl[ internalFormatName ];
@@ -437,7 +435,7 @@ function WebGLTextures( _gl, extensions, state, properties, capabilities, utils,
 				supportsMips = isPowerOfTwo( image ) || isWebGL2,
 				glFormat = utils.convert( texture.format ),
 				glType = utils.convert( texture.type ),
-				glInternalFormat = getInternalFormat( texture, glFormat, glType );
+				glInternalFormat = getInternalFormat( texture.internalFormat, glFormat, glType );
 
 			setTextureParameters( _gl.TEXTURE_CUBE_MAP, texture, supportsMips );
 
@@ -659,7 +657,7 @@ function WebGLTextures( _gl, extensions, state, properties, capabilities, utils,
 		var supportsMips = isPowerOfTwo( image ) || isWebGL2,
 			glFormat = utils.convert( texture.format ),
 			glType = utils.convert( texture.type ),
-			glInternalFormat = getInternalFormat( texture, glFormat, glType );
+			glInternalFormat = getInternalFormat( texture.internalFormat, glFormat, glType );
 
 		setTextureParameters( textureType, texture, supportsMips );
 
@@ -832,7 +830,7 @@ function WebGLTextures( _gl, extensions, state, properties, capabilities, utils,
 
 		var glFormat = utils.convert( renderTarget.texture.format );
 		var glType = utils.convert( renderTarget.texture.type );
-		var glInternalFormat = getInternalFormat( renderTarget.texture, glFormat, glType );
+		var glInternalFormat = getInternalFormat( renderTarget.texture.internalFormat, glFormat, glType );
 		state.texImage2D( textureTarget, 0, glInternalFormat, renderTarget.width, renderTarget.height, 0, glFormat, glType, null );
 		_gl.bindFramebuffer( _gl.FRAMEBUFFER, framebuffer );
 		_gl.framebufferTexture2D( _gl.FRAMEBUFFER, attachment, textureTarget, properties.get( renderTarget.texture ).__webglTexture, 0 );
@@ -882,7 +880,7 @@ function WebGLTextures( _gl, extensions, state, properties, capabilities, utils,
 
 			var glFormat = utils.convert( renderTarget.texture.format );
 			var glType = utils.convert( renderTarget.texture.type );
-			var glInternalFormat = getInternalFormat( renderTarget.texture, glFormat, glType );
+			var glInternalFormat = getInternalFormat( renderTarget.texture.internalFormat, glFormat, glType );
 
 			if ( isMultisample ) {
 
@@ -1029,9 +1027,10 @@ function WebGLTextures( _gl, extensions, state, properties, capabilities, utils,
 					renderTargetProperties.__webglColorRenderbuffer = _gl.createRenderbuffer();
 
 					_gl.bindRenderbuffer( _gl.RENDERBUFFER, renderTargetProperties.__webglColorRenderbuffer );
+
 					var glFormat = utils.convert( renderTarget.texture.format );
 					var glType = utils.convert( renderTarget.texture.type );
-					var glInternalFormat = getInternalFormat( renderTarget.texture, glFormat, glType );
+					var glInternalFormat = getInternalFormat( renderTarget.texture.internalFormat, glFormat, glType );
 					var samples = getRenderTargetSamples( renderTarget );
 					_gl.renderbufferStorageMultisample( _gl.RENDERBUFFER, samples, glInternalFormat, renderTarget.width, renderTarget.height );