From f9a1b7fc1a943d69697167c29e9b538aa44d6b83 Mon Sep 17 00:00:00 2001
From: Olli Etuaho <olli.etuaho@gmail.com>
Date: Tue, 12 Jan 2021 12:38:08 +0200
Subject: [PATCH] Fix EXT_color_buffer_half_float check for WebGL 2

EXT_color_buffer_half_float may be supported on WebGL 2 on platforms that support 16-bit float render targets but not 32-bit float render targets.
---
 src/renderers/WebGLRenderer.js | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/renderers/WebGLRenderer.js b/src/renderers/WebGLRenderer.js
index b0671752a209b8..2f9ba9fcf4d6b8 100644
--- a/src/renderers/WebGLRenderer.js
+++ b/src/renderers/WebGLRenderer.js
@@ -1894,9 +1894,11 @@ function WebGLRenderer( parameters ) {
 
 				}
 
+				const halfFloatSupportedByExt = textureType === HalfFloatType && ( extensions.get( 'EXT_color_buffer_half_float' ) || ( capabilities.isWebGL2 && extensions.get( 'EXT_color_buffer_float' ) ) );
+
 				if ( textureType !== UnsignedByteType && utils.convert( textureType ) !== _gl.getParameter( _gl.IMPLEMENTATION_COLOR_READ_TYPE ) && // IE11, Edge and Chrome Mac < 52 (#9513)
 					! ( textureType === FloatType && ( capabilities.isWebGL2 || extensions.get( 'OES_texture_float' ) || extensions.get( 'WEBGL_color_buffer_float' ) ) ) && // Chrome Mac >= 52 and Firefox
-					! ( textureType === HalfFloatType && ( capabilities.isWebGL2 ? extensions.get( 'EXT_color_buffer_float' ) : extensions.get( 'EXT_color_buffer_half_float' ) ) ) ) {
+					! halfFloatSupportedByExt ) {
 
 					console.error( 'THREE.WebGLRenderer.readRenderTargetPixels: renderTarget is not in UnsignedByteType or implementation defined type.' );
 					return;