From 95d4dc92c1fecb18fd07cac2e1bd486bb608e532 Mon Sep 17 00:00:00 2001
From: Ryan Houdek <Sonicadvance1@gmail.com>
Date: Thu, 11 Jul 2013 11:21:24 -0500
Subject: [PATCH] [Android] Show the OpenGL ES 3 backend video option only on
 devices that support it.

---
 Source/Android/.idea/workspace.xml            | 106 ++++++--------
 Source/Android/res/layout/prefs.xml           |   3 +-
 .../dolphinemu/dolphinemu/PrefsActivity.java  | 134 ++++++++++++++++++
 3 files changed, 182 insertions(+), 61 deletions(-)

diff --git a/Source/Android/.idea/workspace.xml b/Source/Android/.idea/workspace.xml
index 1272e30c4c..4306ba1d4c 100644
--- a/Source/Android/.idea/workspace.xml
+++ b/Source/Android/.idea/workspace.xml
@@ -118,37 +118,21 @@
           </provider>
         </entry>
       </file>
-      <file leaf-file-name="InputConfigActivity.java" pinned="false" current="false" current-in-tab="false">
-        <entry file="file://$PROJECT_DIR$/src/org/dolphinemu/dolphinemu/InputConfigActivity.java">
-          <provider selected="true" editor-type-id="text-editor">
-            <state line="97" column="16" selection-start="3629" selection-end="3721" vertical-scroll-proportion="0.0" vertical-offset="1230" max-vertical-offset="2775">
-              <folding />
-            </state>
-          </provider>
-        </entry>
-      </file>
-      <file leaf-file-name="AndroidManifest.xml" pinned="false" current="false" current-in-tab="false">
-        <entry file="file://$PROJECT_DIR$/AndroidManifest.xml">
-          <provider selected="true" editor-type-id="text-editor">
-            <state line="3" column="26" selection-start="174" selection-end="174" vertical-scroll-proportion="0.0" vertical-offset="30" max-vertical-offset="825">
-              <folding />
-            </state>
-          </provider>
-        </entry>
-      </file>
-      <file leaf-file-name="PrefsActivity.java" pinned="false" current="false" current-in-tab="false">
+      <file leaf-file-name="PrefsActivity.java" pinned="false" current="true" current-in-tab="true">
         <entry file="file://$PROJECT_DIR$/src/org/dolphinemu/dolphinemu/PrefsActivity.java">
           <provider selected="true" editor-type-id="text-editor">
-            <state line="62" column="0" selection-start="1857" selection-end="1857" vertical-scroll-proportion="0.0" vertical-offset="720" max-vertical-offset="1260">
-              <folding />
+            <state line="177" column="17" selection-start="5357" selection-end="5357" vertical-scroll-proportion="0.09090909" vertical-offset="2619" max-vertical-offset="3375">
+              <folding>
+                <element signature="imports" expanded="true" />
+              </folding>
             </state>
           </provider>
         </entry>
       </file>
-      <file leaf-file-name="prefs.xml" pinned="false" current="true" current-in-tab="true">
+      <file leaf-file-name="prefs.xml" pinned="false" current="false" current-in-tab="false">
         <entry file="file://$PROJECT_DIR$/res/layout/prefs.xml">
           <provider selected="true" editor-type-id="text-editor">
-            <state line="6" column="37" selection-start="267" selection-end="267" vertical-scroll-proportion="0.2425876" vertical-offset="0" max-vertical-offset="420">
+            <state line="20" column="33" selection-start="799" selection-end="819" vertical-scroll-proportion="-12.0" vertical-offset="0" max-vertical-offset="435">
               <folding />
             </state>
           </provider>
@@ -169,7 +153,7 @@
       <file leaf-file-name="prefvalues.xml" pinned="false" current="false" current-in-tab="false">
         <entry file="file://$PROJECT_DIR$/res/values/prefvalues.xml">
           <provider selected="true" editor-type-id="text-editor">
-            <state line="1" column="11" selection-start="50" selection-end="50" vertical-scroll-proportion="0.0" vertical-offset="0" max-vertical-offset="255">
+            <state line="8" column="14" selection-start="231" selection-end="248" vertical-scroll-proportion="0.0" vertical-offset="0" max-vertical-offset="255">
               <folding />
             </state>
           </provider>
@@ -178,7 +162,7 @@
       <file leaf-file-name="GameListItem.java" pinned="false" current="false" current-in-tab="false">
         <entry file="file://$PROJECT_DIR$/src/org/dolphinemu/dolphinemu/GameListItem.java">
           <provider selected="true" editor-type-id="text-editor">
-            <state line="22" column="24" selection-start="570" selection-end="570" vertical-scroll-proportion="0.0" vertical-offset="315" max-vertical-offset="1230">
+            <state line="22" column="24" selection-start="570" selection-end="570" vertical-scroll-proportion="0.0" vertical-offset="225" max-vertical-offset="1140">
               <folding />
             </state>
           </provider>
@@ -220,8 +204,8 @@
         <option value="$PROJECT_DIR$/src/org/dolphinemu/dolphinemu/GameListFragment.java" />
         <option value="$PROJECT_DIR$/src/org/dolphinemu/dolphinemu/FolderBrowserAdapter.java" />
         <option value="$PROJECT_DIR$/src/org/dolphinemu/dolphinemu/FolderBrowser.java" />
-        <option value="$PROJECT_DIR$/res/layout/prefs.xml" />
         <option value="$PROJECT_DIR$/res/values/prefvalues.xml" />
+        <option value="$PROJECT_DIR$/res/layout/prefs.xml" />
         <option value="$PROJECT_DIR$/src/org/dolphinemu/dolphinemu/PrefsActivity.java" />
       </list>
     </option>
@@ -781,13 +765,6 @@
         </state>
       </provider>
     </entry>
-    <entry file="file://$PROJECT_DIR$/src/org/dolphinemu/dolphinemu/GameListItem.java">
-      <provider selected="true" editor-type-id="text-editor">
-        <state line="22" column="24" selection-start="570" selection-end="570" vertical-scroll-proportion="0.0" vertical-offset="405" max-vertical-offset="1140">
-          <folding />
-        </state>
-      </provider>
-    </entry>
     <entry file="file://$PROJECT_DIR$/src/org/dolphinemu/dolphinemu/AboutActivity.java">
       <provider selected="true" editor-type-id="text-editor">
         <state line="26" column="125" selection-start="741" selection-end="741" vertical-scroll-proportion="0.0" vertical-offset="120" max-vertical-offset="495">
@@ -816,13 +793,6 @@
         </state>
       </provider>
     </entry>
-    <entry file="file://$PROJECT_DIR$/src/org/dolphinemu/dolphinemu/GameListActivity.java">
-      <provider selected="true" editor-type-id="text-editor">
-        <state line="173" column="16" selection-start="5541" selection-end="5638" vertical-scroll-proportion="0.0" vertical-offset="2070" max-vertical-offset="3390">
-          <folding />
-        </state>
-      </provider>
-    </entry>
     <entry file="file://$PROJECT_DIR$/src/org/dolphinemu/dolphinemu/DolphinEmulator.java">
       <provider selected="true" editor-type-id="text-editor">
         <state line="224" column="45" selection-start="6730" selection-end="6769" vertical-scroll-proportion="0.0" vertical-offset="2668" max-vertical-offset="3315">
@@ -830,13 +800,6 @@
         </state>
       </provider>
     </entry>
-    <entry file="file://$PROJECT_DIR$/src/org/dolphinemu/dolphinemu/InputConfigActivity.java">
-      <provider selected="true" editor-type-id="text-editor">
-        <state line="97" column="16" selection-start="3629" selection-end="3721" vertical-scroll-proportion="0.0" vertical-offset="900" max-vertical-offset="2775">
-          <folding />
-        </state>
-      </provider>
-    </entry>
     <entry file="file://$PROJECT_DIR$/AndroidManifest.xml">
       <provider selected="true" editor-type-id="text-editor">
         <state line="3" column="26" selection-start="174" selection-end="174" vertical-scroll-proportion="0.0" vertical-offset="0" max-vertical-offset="825">
@@ -844,6 +807,20 @@
         </state>
       </provider>
     </entry>
+    <entry file="file://$PROJECT_DIR$/src/org/dolphinemu/dolphinemu/InputConfigActivity.java">
+      <provider selected="true" editor-type-id="text-editor">
+        <state line="97" column="16" selection-start="3629" selection-end="3721" vertical-scroll-proportion="0.03787879" vertical-offset="1230" max-vertical-offset="2775">
+          <folding />
+        </state>
+      </provider>
+    </entry>
+    <entry file="file://$PROJECT_DIR$/src/org/dolphinemu/dolphinemu/GameListItem.java">
+      <provider selected="true" editor-type-id="text-editor">
+        <state line="22" column="24" selection-start="570" selection-end="570" vertical-scroll-proportion="0.0" vertical-offset="405" max-vertical-offset="1140">
+          <folding />
+        </state>
+      </provider>
+    </entry>
     <entry file="file://$PROJECT_DIR$/res/values/strings.xml">
       <provider selected="true" editor-type-id="text-editor">
         <state line="0" column="0" selection-start="0" selection-end="0" vertical-scroll-proportion="0.0" vertical-offset="0" max-vertical-offset="396">
@@ -851,30 +828,39 @@
         </state>
       </provider>
     </entry>
+    <entry file="file://$PROJECT_DIR$/res/layout/prefs.xml">
+      <provider selected="true" editor-type-id="text-editor">
+        <state line="20" column="33" selection-start="799" selection-end="819" vertical-scroll-proportion="-12.0" vertical-offset="0" max-vertical-offset="435">
+          <folding />
+        </state>
+      </provider>
+      <provider editor-type-id="android-designer">
+        <state />
+      </provider>
+    </entry>
     <entry file="file://$PROJECT_DIR$/res/values/prefvalues.xml">
       <provider selected="true" editor-type-id="text-editor">
-        <state line="1" column="11" selection-start="50" selection-end="50" vertical-scroll-proportion="0.0" vertical-offset="0" max-vertical-offset="255">
+        <state line="8" column="14" selection-start="231" selection-end="248" vertical-scroll-proportion="0.0" vertical-offset="0" max-vertical-offset="255">
+          <folding />
+        </state>
+      </provider>
+    </entry>
+    <entry file="file://$PROJECT_DIR$/src/org/dolphinemu/dolphinemu/GameListActivity.java">
+      <provider selected="true" editor-type-id="text-editor">
+        <state line="173" column="16" selection-start="5541" selection-end="5638" vertical-scroll-proportion="0.0" vertical-offset="2070" max-vertical-offset="3390">
           <folding />
         </state>
       </provider>
     </entry>
     <entry file="file://$PROJECT_DIR$/src/org/dolphinemu/dolphinemu/PrefsActivity.java">
       <provider selected="true" editor-type-id="text-editor">
-        <state line="62" column="0" selection-start="1857" selection-end="1857" vertical-scroll-proportion="0.0" vertical-offset="720" max-vertical-offset="1260">
-          <folding />
+        <state line="177" column="17" selection-start="5357" selection-end="5357" vertical-scroll-proportion="0.09090909" vertical-offset="2619" max-vertical-offset="3375">
+          <folding>
+            <element signature="imports" expanded="true" />
+          </folding>
         </state>
       </provider>
     </entry>
-    <entry file="file://$PROJECT_DIR$/res/layout/prefs.xml">
-      <provider selected="true" editor-type-id="text-editor">
-        <state line="6" column="37" selection-start="267" selection-end="267" vertical-scroll-proportion="0.2425876" vertical-offset="0" max-vertical-offset="420">
-          <folding />
-        </state>
-      </provider>
-      <provider editor-type-id="android-designer">
-        <state />
-      </provider>
-    </entry>
   </component>
   <component name="masterDetails">
     <states>
diff --git a/Source/Android/res/layout/prefs.xml b/Source/Android/res/layout/prefs.xml
index f98512d087..34700f56b7 100644
--- a/Source/Android/res/layout/prefs.xml
+++ b/Source/Android/res/layout/prefs.xml
@@ -12,7 +12,8 @@
     </PreferenceCategory>
     <PreferenceCategory
             android:summary="Settings"
-            android:title="Video Settings" >
+            android:title="Video Settings"
+            android:key="videoprefcat">
         <ListPreference
                 android:entries="@array/gpuOptions"
                 android:entryValues="@array/gpuValues"
diff --git a/Source/Android/src/org/dolphinemu/dolphinemu/PrefsActivity.java b/Source/Android/src/org/dolphinemu/dolphinemu/PrefsActivity.java
index a46138a29c..4ce82beefe 100644
--- a/Source/Android/src/org/dolphinemu/dolphinemu/PrefsActivity.java
+++ b/Source/Android/src/org/dolphinemu/dolphinemu/PrefsActivity.java
@@ -2,6 +2,7 @@ package org.dolphinemu.dolphinemu;
 
 import android.app.Activity;
 import android.content.Intent;
+import android.opengl.GLSurfaceView;
 import android.os.Build;
 import android.os.Bundle;
 import android.preference.ListPreference;
@@ -9,6 +10,9 @@ import android.preference.PreferenceActivity;
 import android.preference.PreferenceCategory;
 import android.preference.PreferenceFragment;
 
+import javax.microedition.khronos.egl.*;
+import javax.microedition.khronos.opengles.GL10;
+
 /**
  * Copyright 2013 Dolphin Emulator Project
  * Licensed under GPLv2
@@ -16,6 +20,85 @@ import android.preference.PreferenceFragment;
  */
 public class PrefsActivity extends PreferenceActivity {
 	private PrefsActivity m_activity;
+	private String m_GLVersion;
+	private String m_GLVendor;
+	private String m_GLRenderer;
+
+
+	public class VersionCheck {
+		GLSurfaceView.Renderer mRenderer; // borrow this interface
+
+		EGL10 mEGL;
+		EGLDisplay mEGLDisplay;
+		EGLConfig[] mEGLConfigs;
+		EGLConfig mEGLConfig;
+		EGLContext mEGLContext;
+		EGLSurface mEGLSurface;
+		GL10 mGL;
+
+		String mThreadOwner;
+
+		public VersionCheck() {
+
+			int[] version = new int[2];
+			int[] attribList = new int[] {
+					EGL10.EGL_WIDTH, 1,
+					EGL10.EGL_HEIGHT, 1,
+					EGL10.EGL_RENDERABLE_TYPE, 4,
+					EGL10.EGL_NONE
+			};
+
+			// No error checking performed, minimum required code to elucidate logic
+			mEGL = (EGL10) EGLContext.getEGL();
+			mEGLDisplay = mEGL.eglGetDisplay(EGL10.EGL_DEFAULT_DISPLAY);
+			mEGL.eglInitialize(mEGLDisplay, version);
+			mEGLConfig = chooseConfig(); // Choosing a config is a little more complicated
+			mEGLContext = mEGL.eglCreateContext(mEGLDisplay, mEGLConfig, EGL10.EGL_NO_CONTEXT, null);
+			mEGLSurface = mEGL.eglCreatePbufferSurface(mEGLDisplay, mEGLConfig,  attribList);
+			mEGL.eglMakeCurrent(mEGLDisplay, mEGLSurface, mEGLSurface, mEGLContext);
+			mGL = (GL10) mEGLContext.getGL();
+
+			// Record thread owner of OpenGL context
+			mThreadOwner = Thread.currentThread().getName();
+		}
+
+		public String getVersion()
+		{
+			return mGL.glGetString(GL10.GL_VERSION);
+		}
+
+		public String getVendor()
+		{
+			return mGL.glGetString(GL10.GL_VENDOR);
+		}
+		public String getRenderer()
+		{
+			return mGL.glGetString(GL10.GL_RENDERER);
+		}
+		private EGLConfig chooseConfig() {
+			int[] attribList = new int[] {
+					EGL10.EGL_DEPTH_SIZE, 0,
+					EGL10.EGL_STENCIL_SIZE, 0,
+					EGL10.EGL_RED_SIZE, 8,
+					EGL10.EGL_GREEN_SIZE, 8,
+					EGL10.EGL_BLUE_SIZE, 8,
+					EGL10.EGL_ALPHA_SIZE, 8,
+					EGL10.EGL_NONE
+			};
+
+			// No error checking performed, minimum required code to elucidate logic
+			// Expand on this logic to be more selective in choosing a configuration
+			int[] numConfig = new int[1];
+			mEGL.eglChooseConfig(mEGLDisplay, attribList, null, 0, numConfig);
+			int configSize = numConfig[0];
+			mEGLConfigs = new EGLConfig[configSize];
+			mEGL.eglChooseConfig(mEGLDisplay, attribList, mEGLConfigs, configSize, numConfig);
+
+			return mEGLConfigs[0];  // Best match is probably the first configuration
+		}
+	}
+
+
 
     public class PrefsFragment extends PreferenceFragment {
 
@@ -63,6 +146,57 @@ public class PrefsActivity extends PreferenceActivity {
 
 	        PreferenceCategory mCategory = (PreferenceCategory) findPreference("cpuprefcat");
 	        mCategory.addPreference(etp);
+	        VersionCheck mbuffer = new VersionCheck();
+	        m_GLVersion = mbuffer.getVersion();
+	        m_GLVendor = mbuffer.getVendor();
+	        m_GLRenderer = mbuffer.getRenderer();
+
+	        boolean mSupportsGLES3 = false;
+
+	        if (m_GLVersion.contains("OpenGL ES 3.0")) // 3.0 support
+	            mSupportsGLES3 = true;
+			if (!mSupportsGLES3 && m_GLVendor.equals("Qualcomm"))
+	        {
+		        if (m_GLRenderer.contains("Adreno (TM) 3"))
+		        {
+			        int mVStart, mVEnd = 0;
+			        float mVersion;
+			        mVStart = m_GLVersion.indexOf("V@") + 2;
+			        for (int a = mVStart; a < m_GLVersion.length(); ++a)
+				        if (m_GLVersion.charAt(a) == ' ')
+				        {
+					        mVEnd = a;
+					        break;
+				        }
+			        mVersion = Float.parseFloat(m_GLVersion.substring(mVStart, mVEnd));
+
+			        if (mVersion >= 14.0f)
+				        mSupportsGLES3 = true;
+		        }
+	        }
+
+	        if (!mSupportsGLES3)
+	        {
+		        mCategory = (PreferenceCategory) findPreference("videoprefcat");
+		        ListPreference mPref = (ListPreference) findPreference("gpupref");
+		        mCategory.removePreference(mPref);
+
+		        final ListPreference videobackend = new ListPreference(m_activity);
+
+		        _entries = new CharSequence[] {
+				        "Software Renderer",
+		        };
+		        _entryvalues = new CharSequence[] {"Software Renderer"};
+
+		        videobackend.setKey("gpupref");
+		        videobackend.setTitle("Video Backend");
+		        videobackend.setSummary("Video backend to use");
+
+		        videobackend.setEntries(_entries);
+		        videobackend.setEntryValues(_entryvalues);
+
+		        mCategory.addPreference(videobackend);
+	        }
         }
     }