From 27951bb7c89614e5be1b2a0bf453f1359122fc9f Mon Sep 17 00:00:00 2001
From: Anthony Ramine <n.oxyde@gmail.com>
Date: Sat, 8 Sep 2018 13:26:33 +0200
Subject: [PATCH] Make rgba8_image_to_tex_image_data not overallocate in some
 case

---
 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 b985ea71a15..def1a2bacc4 100644
--- a/components/script/dom/webglrenderingcontext.rs
+++ b/components/script/dom/webglrenderingcontext.rs
@@ -4162,7 +4162,7 @@ fn rgba8_image_to_tex_image_data(
         },
 
         (TexFormat::Luminance, TexDataType::HalfFloat) => {
-            let mut lum = Vec::<u8>::with_capacity(pixel_count * 4);
+            let mut lum = Vec::<u8>::with_capacity(pixel_count * 2);
             for rgba8 in pixels.chunks(4) {
                 let p = luminance(rgba8[0], rgba8[1], rgba8[2]);
                 lum.write_u16::<NativeEndian>(f16::from_f32(p as f32).as_bits()).unwrap();