From 24d1e9c3d240f46d2ecbc7bcad453dd03771e040 Mon Sep 17 00:00:00 2001
From: Mathias Agopian <mathias@google.com>
Date: Mon, 4 Oct 2021 17:07:29 -0700
Subject: [PATCH] dont use ES 3.1+ APIs

FSR assumes modern OpenGL. The functions that pose problem are in fact
never used in filament, so it doesn't matter how they're implemented.
We use the HLSL version instead.
---
 filament/src/materials/fsr/ffx_a.h | 9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)

diff --git a/filament/src/materials/fsr/ffx_a.h b/filament/src/materials/fsr/ffx_a.h
index 477ed5f799..55a7bdae6f 100644
--- a/filament/src/materials/fsr/ffx_a.h
+++ b/filament/src/materials/fsr/ffx_a.h
@@ -649,11 +649,10 @@
  AU3 AAbsSU3(AU3 a){return AU3(abs(ASU3(a)));}
  AU4 AAbsSU4(AU4 a){return AU4(abs(ASU4(a)));}
 //------------------------------------------------------------------------------------------------------------------------------
- AU1 ABfe(AU1 src,AU1 off,AU1 bits){return bitfieldExtract(src,ASU1(off),ASU1(bits));}
- AU1 ABfi(AU1 src,AU1 ins,AU1 mask){return (ins&mask)|(src&(~mask));}
- // Proxy for V_BFI_B32 where the 'mask' is set as 'bits', 'mask=(1<<bits)-1', and 'bits' needs to be an immediate.
- AU1 ABfiM(AU1 src,AU1 ins,AU1 bits){return bitfieldInsert(src,ins,0,ASU1(bits));}
-//------------------------------------------------------------------------------------------------------------------------------
+ AU1 ABfe(highp AU1 src,AU1 off,AU1 bits){AU1 mask=(1u<<bits)-1u;return (src>>off)&mask;}
+ AU1 ABfi(highp AU1 src,AU1 ins,AU1 mask){return (ins&mask)|(src&(~mask));}
+ AU1 ABfiM(highp AU1 src,AU1 ins,AU1 bits){AU1 mask=(1u<<bits)-1u;return (ins&mask)|(src&(~mask));}
+ //------------------------------------------------------------------------------------------------------------------------------
  // V_MED3_F32.
  AF1 AClampF1(AF1 x,AF1 n,AF1 m){return clamp(x,n,m);}
  AF2 AClampF2(AF2 x,AF2 n,AF2 m){return clamp(x,n,m);}