From f3aff7f27478bdc0482dab0a01eaeafa5a126327 Mon Sep 17 00:00:00 2001
From: Joseph Cloutier <jkcloutier@gmail.com>
Date: Fri, 27 May 2022 20:30:07 -0400
Subject: [PATCH] Compile PNG's "intrinsics" when targeting arm64.

As noted in pngpriv.h, the alternative (assembly code) doesn't currently
work on arm64.

There's no mention of iOS or tvOS, so maybe we could remove those?
---
 project/lib/png-files.xml | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/project/lib/png-files.xml b/project/lib/png-files.xml
index 1f95110cf..84c343bbe 100644
--- a/project/lib/png-files.xml
+++ b/project/lib/png-files.xml
@@ -38,10 +38,12 @@
 		<file name="${NATIVE_TOOLKIT_PATH}/png/pngwtran.c" />
 		<file name="${NATIVE_TOOLKIT_PATH}/png/pngwutil.c" />
 
-		<section if="ios || tvos">
+		<!-- Files required only if PNG_ARM_NEON_IMPLEMENTATION == 1 (see pngpriv.h) -->
+		<section if="ios || tvos || HXCPP_ARM64">
 
 			<file name="${NATIVE_TOOLKIT_PATH}/png/arm/arm_init.c" />
 			<file name="${NATIVE_TOOLKIT_PATH}/png/arm/filter_neon_intrinsics.c" />
+			<file name="${NATIVE_TOOLKIT_PATH}/png/arm/palette_neon_intrinsics.c" />
 
 		</section>