[Android] Finally check if regular OpenGL is possible on devices and display/hide it's fragment based upon this in AboutActivity.java.

Also added another constructor to EGLHelper which can be used to quickly query for information.

Source/Android/src/org/dolphinemu/dolphinemu/about/AboutActivity.java

@@ -1,7 +1,7 @@
 package org.dolphinemu.dolphinemu.about;
 
 import org.dolphinemu.dolphinemu.R;
-import org.dolphinemu.dolphinemu.settings.video.VideoSettingsFragment;
+import org.dolphinemu.dolphinemu.utils.EGLHelper;
 
 import android.app.ActionBar;
 import android.app.ActionBar.Tab;
@@ -21,7 +21,7 @@ import android.support.v4.view.ViewPager;
 public final class AboutActivity extends Activity implements TabListener
 {
 	private ViewPager viewPager;
-	private boolean supportsGles3;
+	private EGLHelper eglHelper = new EGLHelper(EGLHelper.EGL_OPENGL_ES2_BIT);
 
 	@Override
 	protected void onCreate(Bundle savedInstanceState)
@@ -32,9 +32,6 @@ public final class AboutActivity extends Activity implements TabListener
 		setContentView(R.layout.viewpager);
 		viewPager = (ViewPager) findViewById(R.id.pager);
 
-		// Check if GLES3 is supported
-		supportsGles3 = VideoSettingsFragment.SupportsGLES3();
-
 		// Initialize the ViewPager adapter.
 		final ViewPagerAdapter adapter = new ViewPagerAdapter(getFragmentManager());
 		viewPager.setAdapter(adapter);
@@ -45,10 +42,10 @@ public final class AboutActivity extends Activity implements TabListener
 		actionBar.addTab(actionBar.newTab().setText(R.string.general).setTabListener(this));
 		actionBar.addTab(actionBar.newTab().setText(R.string.cpu).setTabListener(this));
 		actionBar.addTab(actionBar.newTab().setText(R.string.gles_two).setTabListener(this));
-		if (supportsGles3)
+		if (eglHelper.supportsGLES3())
 			actionBar.addTab(actionBar.newTab().setText(R.string.gles_three).setTabListener(this));
-		// TODO: Check if Desktop GL is possible before enabling.
+		if (eglHelper.supportsOpenGL())
-		actionBar.addTab(actionBar.newTab().setText(R.string.desktop_gl).setTabListener(this));
+			actionBar.addTab(actionBar.newTab().setText(R.string.desktop_gl).setTabListener(this));
 
 		// Set the page change listener
 		viewPager.setOnPageChangeListener(new ViewPager.SimpleOnPageChangeListener()
@@ -61,6 +58,14 @@ public final class AboutActivity extends Activity implements TabListener
 		});
 	}
 
+	@Override
+	public void onDestroy()
+	{
+		super.onDestroy();
+
+		eglHelper.closeHelper();
+	}
+
 	@Override
 	public void onTabSelected(Tab tab, FragmentTransaction ft)
 	{
@@ -94,30 +99,46 @@ public final class AboutActivity extends Activity implements TabListener
 		@Override
 		public Fragment getItem(int position)
 		{
-			switch (position)
+			if (position == 0)
 			{
-				case 0: return new DolphinInfoFragment();
+				return new DolphinInfoFragment();
-				// TODO: The rest of these fragments
-				case 1: return new Fragment(); // CPU
-				case 2: return new Fragment(); // GLES 2
-				case 3: return new Fragment(); // GLES 3
-				case 4: return new Fragment(); // Desktop GL
-
-				default: // Should never happen
-					return null;
 			}
+			else if (position == 1)
+			{
+				return new Fragment(); // CPU
+			}
+			else if (position == 2)    // GLES 2
+			{
+				return new Fragment();
+			}
+			else if (position == 3)    // GLES 3 or OpenGL (depending on circumstances)
+			{
+				if (eglHelper.supportsGLES3())
+					return new Fragment(); // TODO: Return the GLES 3 fragment in this case (normal case)
+				else
+					return new Fragment(); // TODO: Return the OpenGL fragment in this case (GLES3 not supported case)
+			}
+			else if (position == 4)    // OpenGL fragment
+			{
+				return new Fragment();
+			}
+
+			// This should never happen.
+			return null;
 		}
 
 		@Override
 		public int getCount()
 		{
-			// TODO: In the future, make sure to take into account
+			if (eglHelper.supportsGLES3() && eglHelper.supportsOpenGL())
-			//       whether or not regular Desktop GL is possible.
-			if (supportsGles3)
 			{
 				return 5;
 			}
-			else
+			else if (!eglHelper.supportsGLES3() && !eglHelper.supportsOpenGL())
+			{
+				return 3;
+			}
+			else // Either regular OpenGL or GLES3 isn't supported
 			{
 				return 4;
 			}

Source/Android/src/org/dolphinemu/dolphinemu/utils/EGLHelper.java

@@ -34,6 +34,21 @@ public final class EGLHelper
 	public static final int EGL_OPENGL_BIT         = 0x0008;
 	public static final int EGL_OPENGL_ES3_BIT_KHR = 0x0040;
 
+	/**
+	 * Constructor
+	 * <p>
+	 * Initializes the underlying {@link EGLSurface} with a width and height of 1.
+	 * This is useful if all you need to use this class for is to query information
+	 * from specific API contexts.
+	 * 
+	 * @param renderableType Bitmask indicating which types of client API contexts
+	 *                       the framebuffer config must support.
+	 */
+	public EGLHelper(int renderableType)
+	{
+		this(1, 1, renderableType);
+	}
+
 	/**
 	 * Constructor
 	 * 
@@ -85,8 +100,8 @@ public final class EGLHelper
 	 * Gets information through EGL.<br/>
 	 * <p>
 	 * Index 0: Vendor     <br/>
-	 * Index 1: Renderer   <br/>
+	 * Index 1: Version    <br/>
-	 * Index 2: Version    <br/>
+	 * Index 2: Renderer   <br/>
 	 * Index 3: Extensions <br/>
 	 * 
 	 * @return information retrieved through EGL.
@@ -95,8 +110,8 @@ public final class EGLHelper
 	{
 		String[] info = {
 			mGL.glGetString(GL10.GL_VENDOR),
-			mGL.glGetString(GL10.GL_RENDERER),
 			mGL.glGetString(GL10.GL_VERSION),
+			mGL.glGetString(GL10.GL_RENDERER),
 			mGL.glGetString(GL10.GL_EXTENSIONS),
 		};