From 258dfc5b4a0ef632519f8dd8311565d8e898769e Mon Sep 17 00:00:00 2001
From: halx99 <halx99@live.com>
Date: Mon, 31 Aug 2020 15:45:05 +0800
Subject: [PATCH] ETC2 Metal support

---
 cocos/renderer/backend/metal/TextureMTL.mm | 2 +-
 cocos/renderer/backend/metal/Utils.mm      | 3 +++
 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/cocos/renderer/backend/metal/TextureMTL.mm b/cocos/renderer/backend/metal/TextureMTL.mm
index d4df762a38..1aa9fb4ebe 100644
--- a/cocos/renderer/backend/metal/TextureMTL.mm
+++ b/cocos/renderer/backend/metal/TextureMTL.mm
@@ -199,7 +199,7 @@ namespace
         {
             bytesPerRow = 0;
         }
-        else if (textureFormat == PixelFormat::ETC)
+        else if (textureFormat == PixelFormat::ETC || textureFormat == PixelFormat::ETC2_RGBA || textureFormat == PixelFormat::ETC2_RGB)
         {
             bytesPerRow = getBytesPerRowETC(pixelFormat, width);
         }
diff --git a/cocos/renderer/backend/metal/Utils.mm b/cocos/renderer/backend/metal/Utils.mm
index eb49aa25da..3e44df3105 100644
--- a/cocos/renderer/backend/metal/Utils.mm
+++ b/cocos/renderer/backend/metal/Utils.mm
@@ -122,7 +122,10 @@ MTLPixelFormat Utils::toMTLPixelFormat(PixelFormat textureFormat)
         case PixelFormat::PVRTC2:
             return MTLPixelFormatPVRTC_RGB_2BPP;
         case PixelFormat::ETC:
+        case PixelFormat::ETC2_RGB:
             return MTLPixelFormatETC2_RGB8;
+        case PixelFormat::ETC2_RGBA:
+            return MTLPixelFormatEAC_RGBA8;
         case PixelFormat::ASTC4:
             return MTLPixelFormatASTC_4x4_LDR;
         case PixelFormat::ASTC8: