Make compute work without an app context.

Change-Id: I644b4711135d6f5d9866b6c2e5e6f6a5ceb1f3d4

Author: Jason Sams

graphics/java/android/renderscript/RenderScript.java

@@ -87,6 +87,7 @@ public class RenderScript {
      * Name of the file that holds the object cache.
      */
     private static final String CACHE_PATH = "com.android.renderscript.cache";
+    static String mCachePath;
 
      /**
      * Sets the directory to use as a persistent storage for the
@@ -95,8 +96,6 @@ public class RenderScript {
      * @hide
      * @param cacheDir A directory the current process can write to
      */
-
-    static String mCachePath;
     public static void setupDiskCache(File cacheDir) {
         File f = new File(cacheDir, CACHE_PATH);
         mCachePath = f.getAbsolutePath();
@@ -905,7 +904,9 @@ public void run() {
     }
 
     RenderScript(Context ctx) {
-        mApplicationContext = ctx.getApplicationContext();
+        if (ctx != null) {
+            mApplicationContext = ctx.getApplicationContext();
+        }
     }
 
     /**
@@ -917,21 +918,16 @@ public final Context getApplicationContext() {
         return mApplicationContext;
     }
 
-    static int getTargetSdkVersion(Context ctx) {
-        return ctx.getApplicationInfo().targetSdkVersion;
-    }
-
     /**
      * Create a basic RenderScript context.
      *
+     * @hide
      * @param ctx The context.
      * @return RenderScript
      */
-    public static RenderScript create(Context ctx) {
+    public static RenderScript create(Context ctx, int sdkVersion) {
         RenderScript rs = new RenderScript(ctx);
 
-        int sdkVersion = getTargetSdkVersion(ctx);
-
         rs.mDev = rs.nDeviceCreate();
         rs.mContext = rs.nContextCreate(rs.mDev, 0, sdkVersion);
         if (rs.mContext == 0) {
@@ -942,6 +938,17 @@ public static RenderScript create(Context ctx) {
         return rs;
     }
 
+    /**
+     * Create a basic RenderScript context.
+     *
+     * @param ctx The context.
+     * @return RenderScript
+     */
+    public static RenderScript create(Context ctx) {
+        int v = ctx.getApplicationInfo().targetSdkVersion;
+        return create(ctx, v);
+    }
+
     /**
      * Print the currently available debugging information about the state of
      * the RS context to the log.

graphics/java/android/renderscript/RenderScriptGL.java

@@ -166,7 +166,7 @@ public RenderScriptGL(Context ctx, SurfaceConfig sc) {
         super(ctx);
         mSurfaceConfig = new SurfaceConfig(sc);
 
-        int sdkVersion = getTargetSdkVersion(ctx);
+        int sdkVersion = ctx.getApplicationInfo().targetSdkVersion;
 
         mWidth = 0;
         mHeight = 0;