Split GLProfile from GLFeatures.

OpenRA.Game/Graphics/PlatformInterfaces.cs

@@ -15,6 +15,12 @@ using OpenRA.Primitives;
 
 namespace OpenRA
 {
+	public enum GLProfile
+	{
+		Modern,
+		Embedded,
+	}
+
 	public interface IPlatform
 	{
 		IPlatformWindow CreateWindow(Size size, WindowMode windowMode, float scaleModifier, int batchSize, int videoDisplay);

OpenRA.Platforms.Default/FrameBuffer.cs

@@ -50,7 +50,7 @@ namespace OpenRA.Platforms.Default
 			OpenGL.glBindRenderbuffer(OpenGL.GL_RENDERBUFFER, depth);
 			OpenGL.CheckGLError();
 
-			var glDepth = OpenGL.Features.HasFlag(OpenGL.GLFeatures.GLES) ? OpenGL.GL_DEPTH_COMPONENT16 : OpenGL.GL_DEPTH_COMPONENT;
+			var glDepth = OpenGL.Profile == GLProfile.Embedded ? OpenGL.GL_DEPTH_COMPONENT16 : OpenGL.GL_DEPTH_COMPONENT;
 			OpenGL.glRenderbufferStorage(OpenGL.GL_RENDERBUFFER, glDepth, size.Width, size.Height);
 			OpenGL.CheckGLError();
 

OpenRA.Platforms.Default/OpenGL.cs

@@ -29,12 +29,11 @@ namespace OpenRA.Platforms.Default
 		public enum GLFeatures
 		{
 			None = 0,
-			Core = 1,
+			DebugMessagesCallback = 1,
-			GLES = 2,
+			ESReadFormatBGRA = 2,
-			DebugMessagesCallback = 4,
-			ESReadFormatBGRA = 8
 		}
 
+		public static GLProfile Profile { get; private set; }
 		public static GLFeatures Features { get; private set; }
 
 		public static string Version { get; private set; }
@@ -495,7 +494,11 @@ namespace OpenRA.Platforms.Default
 				throw new InvalidProgramException("Failed to initialize low-level OpenGL bindings. GPU information is not available.", e);
 			}
 
-			DetectGLFeatures();
+			if (!DetectGLFeatures())
+			{
+				WriteGraphicsLog("Unsupported OpenGL version: " + glGetString(GL_VERSION));
+				throw new InvalidProgramException("OpenGL Version Error: See graphics.log for details.");
+			}
 
 			// Allow users to force-disable the debug message callback feature to work around driver bugs
 			if (Features.HasFlag(GLFeatures.DebugMessagesCallback) && Game.Settings.Graphics.DisableGLDebugMessageCallback)
@@ -509,18 +512,12 @@ namespace OpenRA.Platforms.Default
 					Features ^= GLFeatures.DebugMessagesCallback;
 			}
 
-			if (!Features.HasFlag(GLFeatures.Core))
-			{
-				WriteGraphicsLog("Unsupported OpenGL version: " + glGetString(GL_VERSION));
-				throw new InvalidProgramException("OpenGL Version Error: See graphics.log for details.");
-			}
-
 			// Setup the debug message callback handler
 			if (Features.HasFlag(GLFeatures.DebugMessagesCallback))
 			{
 				try
 				{
-					var suffix = Features.HasFlag(GLFeatures.GLES) ? "KHR" : "";
+					var suffix = Profile == GLProfile.Embedded ? "KHR" : "";
 					glDebugMessageCallback = Bind<DebugMessageCallback>("glDebugMessageCallback" + suffix);
 					glDebugMessageInsert = Bind<DebugMessageInsert>("glDebugMessageInsert" + suffix);
 
@@ -620,8 +617,9 @@ namespace OpenRA.Platforms.Default
 			return (T)(object)Marshal.GetDelegateForFunctionPointer(SDL.SDL_GL_GetProcAddress(name), typeof(T));
 		}
 
-		public static void DetectGLFeatures()
+		public static bool DetectGLFeatures()
 		{
+			var hasValidConfiguration = false;
 			try
 			{
 				Version = glGetString(GL_VERSION);
@@ -641,13 +639,16 @@ namespace OpenRA.Platforms.Default
 				var hasBGRA = SDL.SDL_GL_ExtensionSupported("GL_EXT_texture_format_BGRA8888") == SDL.SDL_bool.SDL_TRUE;
 				if (Version.Contains(" ES") && hasBGRA && major >= 3)
 				{
-					Features = GLFeatures.Core | GLFeatures.GLES;
+					hasValidConfiguration = true;
-
+					Profile = GLProfile.Embedded;
 					if (SDL.SDL_GL_ExtensionSupported("GL_EXT_read_format_bgra") == SDL.SDL_bool.SDL_TRUE)
 						Features |= GLFeatures.ESReadFormatBGRA;
 				}
 				else if (major > 3 || (major == 3 && minor >= 2))
-					Features = GLFeatures.Core;
+				{
+					hasValidConfiguration = true;
+					Profile = GLProfile.Modern;
+				}
 
 				// Debug callbacks were introduced in GL 4.3
 				var hasDebugMessagesCallback = SDL.SDL_GL_ExtensionSupported("GL_KHR_debug") == SDL.SDL_bool.SDL_TRUE;
@@ -655,6 +656,8 @@ namespace OpenRA.Platforms.Default
 					Features |= GLFeatures.DebugMessagesCallback;
 			}
 			catch (Exception) { }
+
+			return hasValidConfiguration;
 		}
 
 		public static void WriteGraphicsLog(string message)

OpenRA.Platforms.Default/Shader.cs

@@ -33,7 +33,7 @@ namespace OpenRA.Platforms.Default
 			var filename = Path.Combine(Platform.GameDir, "glsl", name + "." + ext);
 			var code = File.ReadAllText(filename);
 
-			var version = OpenGL.Features.HasFlag(OpenGL.GLFeatures.GLES) ? "300 es" : "140";
+			var version = OpenGL.Profile == GLProfile.Embedded ? "300 es" : "140";
 			code = code.Replace("{VERSION}", version);
 
 			var shader = OpenGL.glCreateShader(type);

OpenRA.Platforms.Default/Texture.cs

@@ -75,7 +75,7 @@ namespace OpenRA.Platforms.Default
 		void SetData(IntPtr data, int width, int height)
 		{
 			PrepareTexture();
-			var glInternalFormat = OpenGL.Features.HasFlag(OpenGL.GLFeatures.GLES) ? OpenGL.GL_BGRA : OpenGL.GL_RGBA8;
+			var glInternalFormat = OpenGL.Profile == GLProfile.Embedded ? OpenGL.GL_BGRA : OpenGL.GL_RGBA8;
 			OpenGL.glTexImage2D(OpenGL.GL_TEXTURE_2D, 0, glInternalFormat, width, height,
 				0, OpenGL.GL_BGRA, OpenGL.GL_UNSIGNED_BYTE, data);
 			OpenGL.CheckGLError();
@@ -119,7 +119,7 @@ namespace OpenRA.Platforms.Default
 			var data = new byte[4 * Size.Width * Size.Height];
 
 			// GLES doesn't support glGetTexImage so data must be read back via a frame buffer
-			if (OpenGL.Features.HasFlag(OpenGL.GLFeatures.GLES))
+			if (OpenGL.Profile == GLProfile.Embedded)
 			{
 				// Query the active framebuffer so we can restore it afterwards
 				int lastFramebuffer;