SurfaceTexture: add GL context attach & detach

This change adds Java API support for detaching a SurfaceTexture from one GLES
context and then attaching it to a different one.

Change-Id: I8eed4b0d0e339c11598cb0408d9f4f2d99b3aa06

1 files changed, 27 insertions, 1 deletions

diff --git a/graphics/java/android/graphics/SurfaceTexture.java b/graphics/java/android/graphics/SurfaceTexture.java
index 0521e69..e101581 100644
--- a/graphics/java/android/graphics/SurfaceTexture.java
+++ b/graphics/java/android/graphics/SurfaceTexture.java
@@ -161,7 +161,31 @@ public class SurfaceTexture {
     public void updateTexImage() {
         int err = nativeUpdateTexImage(); 
         if (err != 0) {
-            throw new RuntimeException("Error during updateTexImage (see logs)");
+            throw new RuntimeException("Error during updateTexImage (see logcat for details)");
+        }
+    }
+
+    /**
+     * Detach the SurfaceTexture from the OpenGL ES context with which it is currently associated.
+     * This can be used to change from one OpenGL ES context to another.
+     *
+     * @hide
+     */
+    public void detachFromGLContext() {
+        int err = nativeDetachFromGLContext();
+        if (err != 0) {
+            throw new RuntimeException("Error during detachFromGLContext (see logcat for details)");
+        }
+    }
+
+    /**
+     *
+     * @hide
+     */
+    public void attachToGLContext(int texName) {
+        int err = nativeAttachToGLContext(texName);
+        if (err != 0) {
+            throw new RuntimeException("Error during detachFromGLContext (see logcat for details)");
         }
     }
 
@@ -269,6 +293,8 @@ public class SurfaceTexture {
     private native long nativeGetTimestamp();
     private native void nativeSetDefaultBufferSize(int width, int height);
     private native int nativeUpdateTexImage();
+    private native int nativeDetachFromGLContext();
+    private native int nativeAttachToGLContext(int texName);
     private native int nativeGetQueuedCount();
     private native void nativeRelease();