From 6312a8e9382105196fdf1edddfc68a678acd673e Mon Sep 17 00:00:00 2001
From: Alan Third <alan@idiocy.org>
Date: Mon, 28 Dec 2020 10:40:50 +0000
Subject: Change pixel format

* src/nsterm.m ([EmacsSurface getContext]): Use BGRA for the IOSurface
and specify the CGContext explicitly for compatibility with a wider
range of Macs.
---
 src/nsterm.m | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/nsterm.m b/src/nsterm.m
index 63f48cd242b..b5eb3ac03ba 100644
--- a/src/nsterm.m
+++ b/src/nsterm.m
@@ -9597,7 +9597,7 @@ not_in_argv (NSString *arg)
             (id)kIOSurfaceHeight:[NSNumber numberWithInt:size.height],
             (id)kIOSurfaceBytesPerRow:[NSNumber numberWithInt:bytesPerRow],
             (id)kIOSurfaceBytesPerElement:[NSNumber numberWithInt:4],
-            (id)kIOSurfacePixelFormat:[NSNumber numberWithUnsignedInt:'RGBA']});
+            (id)kIOSurfacePixelFormat:[NSNumber numberWithUnsignedInt:'BGRA']});
     }
 
   IOReturn lockStatus = IOSurfaceLock (surface, 0, nil);
@@ -9614,7 +9614,8 @@ not_in_argv (NSString *arg)
                                    8,
                                    IOSurfaceGetBytesPerRow (currentSurface),
                                    colorSpace,
-                                   IOSurfaceGetPixelFormat (currentSurface));
+                                   (kCGImageAlphaPremultipliedFirst
+                                    | kCGBitmapByteOrder32Host));
   return context;
 }
 
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