From 6a692228fc091fd999763e521e61f2cc50e1284d Mon Sep 17 00:00:00 2001
From: Anthony Ramine <n.oxyde@gmail.com>
Date: Sat, 8 Sep 2018 18:06:51 +0200
Subject: [PATCH] Fix the ALPHA/FLOAT case of rgba8_image_to_tex_image_data

I'm pretty sure this is supposed to write the ALPHA component.
---
 components/script/dom/webglrenderingcontext.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/components/script/dom/webglrenderingcontext.rs b/components/script/dom/webglrenderingcontext.rs
index c96fdcf60b6..24f8458aa1c 100644
--- a/components/script/dom/webglrenderingcontext.rs
+++ b/components/script/dom/webglrenderingcontext.rs
@@ -4107,7 +4107,7 @@ fn rgba8_image_to_tex_image_data(
 
         (TexFormat::Alpha, TexDataType::Float) => {
             for rgba8 in pixels.chunks_mut(4) {
-                let p = rgba8[0] as f32;
+                let p = rgba8[3] as f32;
                 NativeEndian::write_f32(rgba8, p);
             }
             pixels