From 470be03c2ff22346a1f0ae53fa25f53c4d1790b5 Mon Sep 17 00:00:00 2001
From: riperiperi <rhy3756547@hotmail.com>
Date: Mon, 26 Dec 2022 18:50:27 +0000
Subject: GPU: Add fallback when 16-bit formats are not supported (#4108)

* Add conversion for 16 bit RGBA formats (not supported in Rosetta)

* Rebase fix

Rebase fix

* Forgot to remove this

* Fix RGBA16 format conversion

* Add RGBA4 -> RGBA8 conversion

* Handle host stride alignment

* Address Feedback Part 1

* Can't count

* Don't zero out rgb when alpha is 0

* Separate RGBA4 and 5-bit component formats

Not sure of a better way to name them...

* Add A1B5G5R5 conversion

* Put this in the right place.

* Make format naming consistent for capabilities

* Change method names
---
 Ryujinx.Graphics.GAL/Format.cs | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

(limited to 'Ryujinx.Graphics.GAL/Format.cs')

diff --git a/Ryujinx.Graphics.GAL/Format.cs b/Ryujinx.Graphics.GAL/Format.cs
index 87d08803..5e0274e5 100644
--- a/Ryujinx.Graphics.GAL/Format.cs
+++ b/Ryujinx.Graphics.GAL/Format.cs
@@ -448,6 +448,27 @@ namespace Ryujinx.Graphics.GAL
             return false;
         }
 
+        /// <summary>
+        /// Checks if the texture format is 16 bit packed.
+        /// </summary>
+        /// <param name="format">Texture format</param>
+        /// <returns>True if the texture format is 16 bit packed, false otherwise</returns>
+        public static bool Is16BitPacked(this Format format)
+        {
+            switch (format)
+            {
+                case Format.B5G6R5Unorm:
+                case Format.B5G5R5A1Unorm:
+                case Format.R5G5B5X1Unorm:
+                case Format.R5G5B5A1Unorm:
+                case Format.R5G6B5Unorm:
+                case Format.R4G4B4A4Unorm:
+                    return true;
+            }
+
+            return false;
+        }
+
         /// <summary>
         /// Checks if the texture format is an ASTC format.
         /// </summary>
-- 
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