From 100986d8d91b736d543bf3f5e737864b5919db20 Mon Sep 17 00:00:00 2001
From: Philip Rideout <philiprideout@gmail.com>
Date: Fri, 29 Apr 2022 15:31:15 -0700
Subject: [PATCH] Fix WebGL debug build (assert with 3-channel images)

---
 libs/imageio/src/BasisEncoder.cpp | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/libs/imageio/src/BasisEncoder.cpp b/libs/imageio/src/BasisEncoder.cpp
index b32bbadb7d..0c24e710df 100644
--- a/libs/imageio/src/BasisEncoder.cpp
+++ b/libs/imageio/src/BasisEncoder.cpp
@@ -94,10 +94,18 @@ Builder& Builder::miplevel(size_t level, size_t layer, const LinearImage& floatI
         std::unique_ptr<uint8_t[]> data = applyTransferFunction ?
             fromLinearTosRGB<uint8_t, 1>(sourceImage) : fromLinearToGrayscale<uint8_t>(sourceImage);
         basisImage->init(data.get(), floatImage.getWidth(), floatImage.getHeight(), 1);
-    } else {
+    } else if (sourceImage.getChannels() == 4) {
         std::unique_ptr<uint8_t[]> data = applyTransferFunction ?
             fromLinearTosRGB<uint8_t, 4>(sourceImage) : fromLinearToRGB<uint8_t, 4>(sourceImage);
         basisImage->init(data.get(), floatImage.getWidth(), floatImage.getHeight(), 4);
+    } else if (sourceImage.getChannels() == 3) {
+        std::unique_ptr<uint8_t[]> data = applyTransferFunction ?
+            fromLinearTosRGB<uint8_t, 3>(sourceImage) : fromLinearToRGB<uint8_t, 3>(sourceImage);
+        basisImage->init(data.get(), floatImage.getWidth(), floatImage.getHeight(), 3);
+    } else {
+        assert_invariant(false);
+        mImpl->error = true;
+        return *this;
     }
 
     return *this;