From 6296e4442515084bc95aa520f0e71c4191160693 Mon Sep 17 00:00:00 2001
From: Alex Szpakowski <slime73@gmail.com>
Date: Sun, 4 Apr 2021 23:48:23 -0300
Subject: [PATCH] metal: fix clampzero wrap mode.

---
 src/modules/graphics/metal/Graphics.mm | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/src/modules/graphics/metal/Graphics.mm b/src/modules/graphics/metal/Graphics.mm
index 509bbcbfb..23aa90113 100644
--- a/src/modules/graphics/metal/Graphics.mm
+++ b/src/modules/graphics/metal/Graphics.mm
@@ -643,6 +643,11 @@ void Graphics::submitBlitEncoder()
 	}
 }
 
+static bool isClampOne(SamplerState::WrapMode w)
+{
+	return w == SamplerState::WRAP_CLAMP_ONE;
+}
+
 id<MTLSamplerState> Graphics::getCachedSampler(const SamplerState &s)
 { @autoreleasepool {
 	uint64 key = s.toKey();
@@ -662,8 +667,11 @@ id<MTLSamplerState> Graphics::getCachedSampler(const SamplerState &s)
 	desc.tAddressMode = getMTLSamplerAddressMode(s.wrapV);
 	desc.rAddressMode = getMTLSamplerAddressMode(s.wrapW);
 
-	if (@available(macOS 10.12, iOS 10.14, *))
-		desc.borderColor = MTLSamplerBorderColorOpaqueWhite;
+	if (isClampOne(s.wrapU) || isClampOne(s.wrapV) || isClampOne(s.wrapW))
+	{
+		if (@available(macOS 10.12, iOS 10.14, *))
+			desc.borderColor = MTLSamplerBorderColorOpaqueWhite;
+	}
 
 	desc.lodMinClamp = s.minLod;
 	desc.lodMaxClamp = s.maxLod;