From 7cbb9c1c33dae0ecdc425e88be9b1cc7fa594391 Mon Sep 17 00:00:00 2001
From: Jeff Gilbert <jdashg@gmail.com>
Date: Fri, 25 Jan 2019 16:54:12 -0800
Subject: [PATCH] Add Texture.canUse[Half]FloatingPointRTT().

---
 src/texture.js | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/src/texture.js b/src/texture.js
index 40b76fd..65c9b2e 100644
--- a/src/texture.js
+++ b/src/texture.js
@@ -207,6 +207,13 @@ Texture.canUseFloatingPointLinearFiltering = function() {
   return !!gl.getExtension('OES_texture_float_linear');
 };
 
+// ### GL.Texture.canUseFloatingPointRTT()
+//
+// Returns false if float32 textures can't be rendered to.
+Texture.canUseFloatingPointRTT = function() {
+  return !!gl.getExtension('WEBGL_color_buffer_float');
+};
+
 // ### GL.Texture.canUseFloatingPointTextures()
 //
 // Returns false if `gl.HALF_FLOAT_OES` is not supported as a texture type.
@@ -223,3 +230,10 @@ Texture.canUseHalfFloatingPointTextures = function() {
 Texture.canUseHalfFloatingPointLinearFiltering = function() {
   return !!gl.getExtension('OES_texture_half_float_linear');
 };
+
+// ### GL.Texture.canUseHalfFloatingPointRTT()
+//
+// Returns false if float16 textures can't be rendered to.
+Texture.canUseHalfFloatingPointRTT = function() {
+  return !!gl.getExtension('EXT_color_buffer_half_float');
+};