dsda: set gammma after core seal but before first frame advance

src/BizHawk.Emulation.Cores/Computers/Doom/DSDA.ISettable.cs

@@ -323,7 +323,7 @@ namespace BizHawk.Emulation.Cores.Computers.Doom
 			public MultiplayerMode MultiplayerMode { get; set; }
 
 			[DisplayName("Initial Episode")]
-			[Description("Selects the initial episode. Ignored for non-episodic IWADs (e.g., DOOM2)")]
+			[Description("Selects the initial episode. Ignored for non-episodic IWADs (e.g., DOOM2) and Shareware.")]
 			[DefaultValue(1)]
 			public int InitialEpisode { get; set; }
 

src/BizHawk.Emulation.Cores/Computers/Doom/DSDA.IVideoProvider.cs

@@ -17,20 +17,17 @@ namespace BizHawk.Emulation.Cores.Computers.Doom
 		public int VsyncDenominator { get; }
 		public int[] GetVideoBuffer() => _vidBuff;
 
-		private unsafe void UpdateVideo()
+		private unsafe void UpdateVideo(int gamma = -1)
 		{
 			using (_elf.EnterExit())
 			{
-				var videoBufferSrc = IntPtr.Zero;
-				var palletteBufferSrc = IntPtr.Zero;
+				_core.dsda_get_video(gamma, out LibDSDA.VideoInfo vi);
 
-				_core.dsda_get_video(out var width, out var height, out var pitch, ref videoBufferSrc, out var paletteSize, ref palletteBufferSrc);
-
-				var videoBuffer = (byte*) videoBufferSrc.ToPointer();
-				var paletteBuffer = (int*) palletteBufferSrc.ToPointer();
-				PaletteSize = paletteSize;
-				BufferWidth = width;
-				BufferHeight = height;
+				var videoBuffer = (byte*)vi.VideoBuffer.ToPointer();
+				var paletteBuffer = (int*)vi.PaletteBuffer.ToPointer();
+				PaletteSize = vi.PaletteSize;
+				BufferWidth = vi.Width;
+				BufferHeight = vi.Height;
 
 				// Handling pallette buffer
 				if (_palBuffer.Length < PaletteSize)

src/BizHawk.Emulation.Cores/Computers/Doom/DSDA.cs

@@ -39,9 +39,11 @@ namespace BizHawk.Emulation.Cores.Computers.Doom
 			_pwadFiles = new();
 			bool foundIWAD = false;
 			string IWADName = "";
+
 			foreach (var wadFile in _wadFiles)
 			{
 				bool recognized = false;
+
 				if (wadFile.RomData is [ (byte) 'I', (byte) 'W', (byte) 'A', (byte) 'D', .. ])
 				{
 					// Check not more than one IWAD is provided
@@ -56,18 +58,28 @@ namespace BizHawk.Emulation.Cores.Computers.Doom
 					_pwadFiles.Add(wadFile);
 					recognized = true;
 				}
-				if (!recognized) throw new Exception($"Unrecognized WAD provided: '{wadFile.RomPath}' has non-standard header.");
+
+				if (!recognized)
+				{
+					throw new Exception($"Unrecognized WAD provided: '{wadFile.RomPath}' has non-standard header.");
+				}
 			}
 
 			// Check at least one IWAD was provided
-			if (!foundIWAD) throw new Exception($"No IWAD was provided");
+			if (!foundIWAD)
+			{
+				throw new Exception($"No IWAD was provided");
+			}
 
 			// Getting dsda-doom.wad -- required by DSDA
 			_dsdaWadFileData = Zstd.DecompressZstdStream(new MemoryStream(Resources.DSDA_DOOM_WAD.Value)).ToArray();
 
 			// Getting sum of wad sizes for the accurate calculation of the invisible heap
 			uint totalWadSize = (uint)_dsdaWadFileData.Length;
-			foreach (var wadFile in _wadFiles) totalWadSize += (uint) wadFile.FileData.Length;
+			foreach (var wadFile in _wadFiles)
+			{
+				totalWadSize += (uint) wadFile.FileData.Length;
+			}
 			uint totalWadSizeKb = (totalWadSize / 1024) + 1;
 			Console.WriteLine($"Reserving {totalWadSizeKb}kb for WAD file memory");
 
@@ -135,16 +147,20 @@ namespace BizHawk.Emulation.Cores.Computers.Doom
 					_core.dsda_add_wad_file(_dsdaWadFileName, _dsdaWadFileData.Length, _loadCallback);
 
 					// Adding IWAD file
-					var loadWadResult = _core.dsda_add_wad_file(_iwadFile.RomPath, _iwadFile.RomData.Length, _loadCallback);
-					if (loadWadResult is 0) throw new Exception($"Could not load WAD file: '{_iwadFile.RomPath}'");
-					_gameMode = (LibDSDA.GameMode)loadWadResult;
+					_gameMode = _core.dsda_add_wad_file(_iwadFile.RomPath, _iwadFile.RomData.Length, _loadCallback);
+					if (_gameMode is LibDSDA.GameMode.Fail)
+					{
+						throw new Exception($"Could not load WAD file: '{_iwadFile.RomPath}'");
+					}
 
 					// Adding PWAD file(s)
 					foreach (var wadFile in _pwadFiles)
 					{
-						loadWadResult = _core.dsda_add_wad_file(wadFile.RomPath, wadFile.RomData.Length, _loadCallback);
-						if (loadWadResult is 0) throw new Exception($"Could not load WAD file: '{wadFile.RomPath}'");
-						_gameMode = (LibDSDA.GameMode)loadWadResult;
+						_gameMode = _core.dsda_add_wad_file(wadFile.RomPath, wadFile.RomData.Length, _loadCallback);
+						if (_gameMode is LibDSDA.GameMode.Fail)
+						{
+							throw new Exception($"Could not load WAD file: '{wadFile.RomPath}'");
+						}
 					}
 
 					_elf.AddReadonlyFile(_configFile, "dsda-doom.cfg");
@@ -152,7 +168,10 @@ namespace BizHawk.Emulation.Cores.Computers.Doom
 					var initSettings = _syncSettings.GetNativeSettings(lp.Game);
 					CreateArguments(initSettings);
 					var initResult = _core.dsda_init(ref initSettings, _args.Count, _args.ToArray());
-					if (!initResult) throw new Exception($"{nameof(_core.dsda_init)}() failed");
+					if (!initResult)
+					{
+						throw new Exception($"{nameof(_core.dsda_init)}() failed");
+					}
 
 					VsyncNumerator = 35;
 					VsyncDenominator = 1;
@@ -182,7 +201,10 @@ namespace BizHawk.Emulation.Cores.Computers.Doom
 					_elf.Seal();
 				}
 
-				UpdateVideo();
+				// we have to set gamma after the core is sealed to ensure states don't depend on its initial value
+				// but if we set it during frame advance, first frame won't have it set
+				// so we set gamma here and force a video update, and other UpdateVideo() calls are blank
+				UpdateVideo(_settings.Gamma);
 
 				// Registering memory domains
 				SetupMemoryDomains();

src/BizHawk.Emulation.Cores/Computers/Doom/LibDSDA.cs

@@ -78,6 +78,17 @@ namespace BizHawk.Emulation.Cores.Computers.Doom
 			public int MapOverlay;
 			public int PlayerPointOfView;
 		}
+		
+		[StructLayout(LayoutKind.Sequential)]
+		public struct VideoInfo
+		{
+			public int Width;
+			public int Height;
+			public int Pitch;
+			public int PaletteSize;
+			public IntPtr PaletteBuffer;
+			public IntPtr VideoBuffer;
+		};
 
 		[BizImport(CallingConvention.Cdecl)]
 		public abstract void dsda_get_audio(ref int n, ref IntPtr buffer);
@@ -86,12 +97,12 @@ namespace BizHawk.Emulation.Cores.Computers.Doom
 		public abstract bool dsda_init(ref InitSettings settings, int argc, string[] argv);
 
 		[BizImport(CallingConvention.Cdecl)]
-		public abstract void dsda_get_video(out int w, out int h, out int pitch, ref IntPtr buffer, out int palSize, ref IntPtr palBuffer);
+		public abstract void dsda_get_video(int gamma, out VideoInfo info);
 
 		[UnmanagedFunctionPointer(CallingConvention.Cdecl)]
 		public delegate int load_archive_cb(string filename, IntPtr buffer, int maxsize);
 		[BizImport(CallingConvention.Cdecl)]
-		public abstract int dsda_add_wad_file(string fileName, int fileSize, load_archive_cb feload_archive_cb);
+		public abstract GameMode dsda_add_wad_file(string fileName, int fileSize, load_archive_cb feload_archive_cb);
 
 		[BizImport(CallingConvention.Cdecl)]
 		public abstract byte dsda_read_memory_array(MemoryArrayType type, uint addr);

waterbox/dsda/BizhawkInterface.c

@@ -143,13 +143,19 @@ ECL_EXPORT void dsda_get_audio(int *n, void **buffer)
     *buffer = audioBuffer;
 }
 
-ECL_EXPORT void dsda_get_video(int *w, int *h, int *pitch, uint8_t **buffer, int *paletteSize, uint32_t **paletteBuffer)
+ECL_EXPORT void dsda_get_video(int gamma, struct VideoInfo* vi)
 {
-  *buffer = (uint8_t *)headlessGetVideoBuffer();
-  *w = headlessGetVideoWidth();
-  *h = headlessGetVideoHeight();
-  *pitch = headlessGetVideoPitch();
-  *paletteSize = PALETTE_SIZE;
+  if (gamma != -1)
+  {
+    dsda_UpdateIntConfig(dsda_config_usegamma, gamma, true);
+    headlessUpdateVideo();
+  }
+
+  vi->buffer = (uint8_t *)headlessGetVideoBuffer();
+  vi->width = headlessGetVideoWidth();
+  vi->height = headlessGetVideoHeight();
+  vi->pitch = headlessGetVideoPitch();
+  vi->paletteSize = PALETTE_SIZE;
 
   uint32_t *palette = headlessGetPallette() + PALETTE_SIZE * currentPaletteIndex;
   for (size_t i = 0; i < PALETTE_SIZE; i++)
@@ -162,7 +168,7 @@ ECL_EXPORT void dsda_get_video(int *w, int *h, int *pitch, uint8_t **buffer, int
     dstColor[3] = srcColor[3];
   }
 
-  *paletteBuffer = _convertedPaletteBuffer;
+  vi->paletteBuffer = _convertedPaletteBuffer;
 }
 
 ECL_EXPORT bool dsda_frame_advance(AutomapButtons buttons, struct PackedPlayerInput *player1Inputs, struct PackedPlayerInput *player2Inputs, struct PackedPlayerInput *player3Inputs, struct PackedPlayerInput *player4Inputs, struct PackedRenderInfo *renderInfo)

waterbox/dsda/BizhawkInterface.h

@@ -179,4 +179,13 @@ struct PackedRenderInfo
   int PlayerPointOfView;
 } __attribute__((packed));
 
+struct VideoInfo {
+  int width;
+	int height;
+	int pitch;
+	int paletteSize;
+	uint32_t* paletteBuffer;
+	uint8_t* buffer;
+};
+
 #endif