fix(gpu): decode Gen5 R16 and RG32 render-target formats

Co-authored-by: Cursor <cursoragent@cursor.com>

src/SharpEmu.Libs/Gpu/Metal/MetalGuestFormats.cs

@@ -218,6 +218,13 @@ internal static class MetalGuestFormats
     {
         var format = (dataFormat, numberType) switch
         {
+            // Early G-buffer / scene targets (R16 + RG32). Keep in sync with
+            // VulkanVideoPresenter.TryDecodeRenderTargetFormat.
+            (2, 0) => MtlPixelFormat.R16Unorm,
+            (2, 1) => MtlPixelFormat.R16Snorm,
+            (2, 4) => MtlPixelFormat.R16Uint,
+            (2, 5) => MtlPixelFormat.R16Sint,
+            (2, 7) => MtlPixelFormat.R16Float,
             (4, 4) => MtlPixelFormat.R32Uint,
             (4, 5) => MtlPixelFormat.R32Sint,
             (4, 7) => MtlPixelFormat.R32Float,
@@ -230,6 +237,8 @@ internal static class MetalGuestFormats
             (10, 5) => MtlPixelFormat.Rgba8Sint,
             (10, 9) => MtlPixelFormat.Rgba8UnormSrgb,
             (10, _) => MtlPixelFormat.Rgba8Unorm,
+            (11, 4) => MtlPixelFormat.Rg32Uint,
+            (11, 5) => MtlPixelFormat.Rg32Sint,
             (11, 7) => MtlPixelFormat.Rg32Float,
             (12, 4) => MtlPixelFormat.Rgba16Uint,
             (12, 5) => MtlPixelFormat.Rgba16Sint,
@@ -258,10 +267,12 @@ internal static class MetalGuestFormats
 
         var outputKind = format switch
         {
-            MtlPixelFormat.R8Uint or MtlPixelFormat.R32Uint or MtlPixelFormat.Rg16Uint or
-                MtlPixelFormat.Rgba8Uint or MtlPixelFormat.Rgba16Uint => Gen5PixelOutputKind.Uint,
-            MtlPixelFormat.R32Sint or MtlPixelFormat.Rg16Sint or MtlPixelFormat.Rgba8Sint or
-                MtlPixelFormat.Rgba16Sint => Gen5PixelOutputKind.Sint,
+            MtlPixelFormat.R8Uint or MtlPixelFormat.R16Uint or MtlPixelFormat.R32Uint or
+                MtlPixelFormat.Rg16Uint or MtlPixelFormat.Rg32Uint or MtlPixelFormat.Rgba8Uint or
+                MtlPixelFormat.Rgba16Uint => Gen5PixelOutputKind.Uint,
+            MtlPixelFormat.R16Sint or MtlPixelFormat.R32Sint or MtlPixelFormat.Rg16Sint or
+                MtlPixelFormat.Rg32Sint or MtlPixelFormat.Rgba8Sint or MtlPixelFormat.Rgba16Sint =>
+                Gen5PixelOutputKind.Sint,
             _ => Gen5PixelOutputKind.Float,
         };
         result = new MetalRenderTargetFormat(format, outputKind);

src/SharpEmu.Libs/VideoOut/VulkanVideoPresenter.cs

@@ -2025,6 +2025,15 @@ internal static unsafe class VulkanVideoPresenter
     {
         var format = (dataFormat, numberType) switch
         {
+            // Early G-buffer / scene targets (R16 + RG32). GTA V Enhanced hits
+            // these as color targets; texture decode already knew them.
+            (2, 0) => Format.R16Unorm,
+            (2, 1) => Format.R16SNorm,
+            (2, 2) => Format.R16Uscaled,
+            (2, 3) => Format.R16Sscaled,
+            (2, 4) => Format.R16Uint,
+            (2, 5) => Format.R16Sint,
+            (2, 7) => Format.R16Sfloat,
             (4, 4) => Format.R32Uint,
             (4, 5) => Format.R32Sint,
             (4, 7) => Format.R32Sfloat,
@@ -2037,6 +2046,8 @@ internal static unsafe class VulkanVideoPresenter
             (10, 5) => Format.R8G8B8A8Sint,
             (10, 9) => Format.R8G8B8A8Srgb,
             (10, _) => Format.R8G8B8A8Unorm,
+            (11, 4) => Format.R32G32Uint,
+            (11, 5) => Format.R32G32Sint,
             (11, 7) => Format.R32G32Sfloat,
             (12, 4) => Format.R16G16B16A16Uint,
             (12, 5) => Format.R16G16B16A16Sint,
@@ -2065,10 +2076,11 @@ internal static unsafe class VulkanVideoPresenter
 
         var outputKind = format switch
         {
-            Format.R8Uint or Format.R32Uint or Format.R16G16Uint or
-                Format.R8G8B8A8Uint or Format.R16G16B16A16Uint => Gen5PixelOutputKind.Uint,
-            Format.R32Sint or Format.R16G16Sint or Format.R8G8B8A8Sint or
-                Format.R16G16B16A16Sint => Gen5PixelOutputKind.Sint,
+            Format.R8Uint or Format.R16Uint or Format.R32Uint or Format.R16G16Uint or
+                Format.R32G32Uint or Format.R8G8B8A8Uint or Format.R16G16B16A16Uint =>
+                Gen5PixelOutputKind.Uint,
+            Format.R16Sint or Format.R32Sint or Format.R16G16Sint or Format.R32G32Sint or
+                Format.R8G8B8A8Sint or Format.R16G16B16A16Sint => Gen5PixelOutputKind.Sint,
             _ => Gen5PixelOutputKind.Float,
         };
         result = new VulkanRenderTargetFormat(format, outputKind);

tests/SharpEmu.Libs.Tests/VideoOut/VulkanPresentEncodeFormatTests.cs

@@ -56,4 +56,26 @@ public sealed class VulkanPresentEncodeFormatTests
     {
         Assert.False(VulkanVideoPresenter.IsLinearFloatPresentSource(sourceFormat));
     }
+
+    // GTA V Enhanced early G-buffer color targets observed as COMPAT failures
+    // when missing from TryDecodeRenderTargetFormat (format=2 / format=11).
+    [Theory]
+    [InlineData(2u, 0u, Format.R16Unorm)]
+    [InlineData(2u, 4u, Format.R16Uint)]
+    [InlineData(2u, 7u, Format.R16Sfloat)]
+    [InlineData(11u, 4u, Format.R32G32Uint)]
+    [InlineData(11u, 5u, Format.R32G32Sint)]
+    [InlineData(11u, 7u, Format.R32G32Sfloat)]
+    public void TryDecodeRenderTargetFormat_DecodesGen5R16AndRg32(
+        uint dataFormat,
+        uint numberType,
+        Format expected)
+    {
+        Assert.True(
+            VulkanVideoPresenter.TryDecodeRenderTargetFormat(
+                dataFormat,
+                numberType,
+                out var decoded));
+        Assert.Equal(expected, decoded.Format);
+    }
 }