* Egl.cs:

* EglContext.cs:
* EglGraphicsMode.cs: Added a parameter to indicate which ES renderer
  version we wish to use. Fixes issue [#2247]: "CreateEGLGraphicsMode
  should select the correct renderer".

git-svn-id: https://opentk.svn.sourceforge.net/svnroot/opentk/trunk@3060 ebc5dd9b-fb1d-0410-b6f8-d24c324e9604

Source/OpenTK/Platform/Egl/Egl.cs

@@ -2,7 +2,7 @@
 //
 // The Open Toolkit Library License
 //
-// Copyright (c) 2006 - 2009 the Open Toolkit library.
+// Copyright (c) 2006 - 2011 the Open Toolkit library.
 //
 // Permission is hereby granted, free of charge, to any person obtaining a copy
 // of this software and associated documentation files (the "Software"), to deal
@@ -41,6 +41,15 @@ namespace OpenTK.Platform.Egl
     using EGLSurface = IntPtr;
     using EGLClientBuffer = IntPtr;
 
+    [Flags]
+    enum RenderableFlags
+    {
+        ES = Egl.OPENGL_ES_BIT,
+        ES2 = Egl.OPENGL_ES2_BIT,
+        GL = Egl.OPENGL_BIT,
+        VG = Egl.OPENVG_BIT,
+    }
+
     static partial class Egl
     {
         public const int VERSION_1_0 = 1;

Source/OpenTK/Platform/Egl/EglContext.cs

@@ -61,7 +61,13 @@ class EglContext : EmbeddedGraphicsContext
 
             WindowInfo = window;
 
-            Mode = new EglGraphicsMode().SelectGraphicsMode(mode.ColorFormat, mode.Depth, mode.Stencil, mode.Samples, mode.AccumulatorFormat, mode.Buffers, mode.Stereo);
+            // Select an EGLConfig that matches the desired mode. We cannot use the 'mode'
+            // parameter directly, since it may have originated on a different system (e.g. GLX)
+            // and it may not support the desired renderer.
+            Mode = new EglGraphicsMode().SelectGraphicsMode(mode.ColorFormat,
+                mode.Depth, mode.Stencil, mode.Samples, mode.AccumulatorFormat,
+                mode.Buffers, mode.Stereo,
+                major > 1 ? RenderableFlags.ES2 : RenderableFlags.ES);
             if (!Mode.Index.HasValue)
                 throw new GraphicsModeException("Invalid or unsupported GraphicsMode.");
             IntPtr config = Mode.Index.Value;

Source/OpenTK/Platform/Egl/EglGraphicsMode.cs

@@ -36,20 +36,28 @@ class EglGraphicsMode : IGraphicsMode
     {
         #region IGraphicsMode Members
 
-        public GraphicsMode SelectGraphicsMode(ColorFormat color, int depth, int stencil, int samples, ColorFormat accum, int buffers, bool stereo)
+        public GraphicsMode SelectGraphicsMode(ColorFormat color, int depth, int stencil,
+            int samples, ColorFormat accum, int buffers, bool stereo)
+        {
+            // According to the EGL specs, the ES flag should select ES 1.0 or higher, which
+            // makes sense as a default. EglContext.cs checks 
+            return SelectGraphicsMode(color, depth, stencil, samples, accum, buffers, stereo,
+                RenderableFlags.ES);
+        }
+
+        #endregion
+
+        #region Public Members
+
+        public GraphicsMode SelectGraphicsMode(ColorFormat color, int depth, int stencil,
+            int samples, ColorFormat accum, int buffers, bool stereo,
+            RenderableFlags renderable_flags)
         {
             IntPtr[] configs = new IntPtr[1];
             int[] attribList = new int[] 
             { 
                 //Egl.SURFACE_TYPE, Egl.WINDOW_BIT,
-
-                // Context creation will fail unless one of these bits is set. Hopefully, setting all bits will not
-                // cause any ugly side-effects.
-                // If this doesn't work, we'll have to use Egl.GetConfigs and implement our own selection logic,
-                // because we the exact ES version is not known when selecting a graphics context.
-                // (See WinGraphicsMode.cs for an selection logic implementation).
-                // Todo: add Egl.OPENVG_BIT here if we ever add OpenVG bindings.
-                Egl.RENDERABLE_TYPE, Egl.OPENGL_ES_BIT | Egl.OPENGL_ES2_BIT | Egl.OPENGL_BIT,
+                Egl.RENDERABLE_TYPE, (int)renderable_flags,
 
                 Egl.RED_SIZE, color.Red, 
                 Egl.GREEN_SIZE, color.Green,