diff -r 000000000000 -r 6474c204b198 gfx/thebes/nsSurfaceTexture.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gfx/thebes/nsSurfaceTexture.cpp	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,247 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+// vim:set ts=2 sts=2 sw=2 et cin:
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifdef MOZ_WIDGET_ANDROID
+
+#include <set>
+#include <map>
+#include <android/log.h>
+#include "nsSurfaceTexture.h"
+#include "AndroidBridge.h"
+#include "nsThreadUtils.h"
+#include "mozilla/gfx/Matrix.h"
+
+using namespace mozilla;
+
+// UGH
+static std::map<int, nsSurfaceTexture*> sInstances;
+static int sNextID = 0;
+
+static class JNIFunctions {
+public:
+
+  JNIFunctions() : mInitialized(false)
+  {
+  }
+
+  bool EnsureInitialized()
+  {
+    if (mInitialized)
+      return true;
+
+    JNIEnv* env = GetJNIForThread();
+
+    AutoLocalJNIFrame jniFrame(env);
+
+    jSurfaceTextureClass = (jclass)env->NewGlobalRef(env->FindClass("android/graphics/SurfaceTexture"));
+    jSurfaceTexture_Ctor = env->GetMethodID(jSurfaceTextureClass, "<init>", "(I)V");
+    jSurfaceTexture_updateTexImage = env->GetMethodID(jSurfaceTextureClass, "updateTexImage", "()V");
+    jSurfaceTexture_getTransformMatrix = env->GetMethodID(jSurfaceTextureClass, "getTransformMatrix", "([F)V");
+
+    mInitialized = true;
+    return true;
+  }
+
+  jobject CreateSurfaceTexture(GLuint aTexture)
+  {
+    if (!EnsureInitialized())
+      return nullptr;
+
+    JNIEnv* env = GetJNIForThread();
+
+    AutoLocalJNIFrame jniFrame(env);
+
+    return env->NewGlobalRef(env->NewObject(jSurfaceTextureClass, jSurfaceTexture_Ctor, (int) aTexture));
+  }
+
+  void ReleaseSurfaceTexture(jobject aSurfaceTexture)
+  {
+    JNIEnv* env = GetJNIForThread();
+
+    env->DeleteGlobalRef(aSurfaceTexture);
+  }
+
+  void UpdateTexImage(jobject aSurfaceTexture)
+  {
+    JNIEnv* env = GetJNIForThread();
+
+    AutoLocalJNIFrame jniFrame(env);
+    env->CallVoidMethod(aSurfaceTexture, jSurfaceTexture_updateTexImage);
+  }
+
+  bool GetTransformMatrix(jobject aSurfaceTexture, gfx::Matrix4x4& aMatrix)
+  {
+    JNIEnv* env = GetJNIForThread();
+
+    AutoLocalJNIFrame jniFrame(env);
+
+    jfloatArray jarray = env->NewFloatArray(16);
+    env->CallVoidMethod(aSurfaceTexture, jSurfaceTexture_getTransformMatrix, jarray);
+
+    jfloat* array = env->GetFloatArrayElements(jarray, nullptr);
+
+    aMatrix._11 = array[0];
+    aMatrix._12 = array[1];
+    aMatrix._13 = array[2];
+    aMatrix._14 = array[3];
+
+    aMatrix._21 = array[4];
+    aMatrix._22 = array[5];
+    aMatrix._23 = array[6];
+    aMatrix._24 = array[7];
+
+    aMatrix._31 = array[8];
+    aMatrix._32 = array[9];
+    aMatrix._33 = array[10];
+    aMatrix._34 = array[11];
+
+    aMatrix._41 = array[12];
+    aMatrix._42 = array[13];
+    aMatrix._43 = array[14];
+    aMatrix._44 = array[15];
+
+    env->ReleaseFloatArrayElements(jarray, array, 0);
+
+    return false;
+  }
+
+private:
+  bool mInitialized;
+
+  jclass jSurfaceTextureClass;
+  jmethodID jSurfaceTexture_Ctor;
+  jmethodID jSurfaceTexture_updateTexImage;
+  jmethodID jSurfaceTexture_getTransformMatrix;
+
+} sJNIFunctions;
+
+nsSurfaceTexture*
+nsSurfaceTexture::Create(GLuint aTexture)
+{
+  // Right now we only support creating this on the main thread because
+  // of the JNIEnv assumptions in JNIHelper and elsewhere
+  if (!NS_IsMainThread())
+    return nullptr;
+
+  nsSurfaceTexture* st = new nsSurfaceTexture();
+  if (!st->Init(aTexture)) {
+    printf_stderr("Failed to initialize nsSurfaceTexture");
+    delete st;
+    st = nullptr;
+  }
+
+  return st;
+}
+
+nsSurfaceTexture*
+nsSurfaceTexture::Find(int id)
+{
+  std::map<int, nsSurfaceTexture*>::iterator it;
+
+  it = sInstances.find(id);
+  if (it == sInstances.end())
+    return nullptr;
+
+  return it->second;
+}
+
+bool
+nsSurfaceTexture::Check()
+{
+  return sJNIFunctions.EnsureInitialized();
+}
+
+bool
+nsSurfaceTexture::Init(GLuint aTexture)
+{
+  if (!sJNIFunctions.EnsureInitialized())
+    return false;
+
+  JNIEnv* env = GetJNIForThread();
+
+  mSurfaceTexture = sJNIFunctions.CreateSurfaceTexture(aTexture);
+  if (!mSurfaceTexture)
+    return false;
+
+  mNativeWindow = AndroidBridge::Bridge()->AcquireNativeWindowFromSurfaceTexture(env, mSurfaceTexture);
+
+  mID = ++sNextID;
+  sInstances.insert(std::pair<int, nsSurfaceTexture*>(mID, this));
+
+  return true;
+}
+
+nsSurfaceTexture::nsSurfaceTexture()
+  : mSurfaceTexture(nullptr), mNativeWindow(nullptr)
+{
+}
+
+nsSurfaceTexture::~nsSurfaceTexture()
+{
+  sInstances.erase(mID);
+
+  mFrameAvailableCallback = nullptr;
+
+  if (mNativeWindow) {
+    AndroidBridge::Bridge()->ReleaseNativeWindowForSurfaceTexture(mSurfaceTexture);
+    mNativeWindow = nullptr;
+  }
+
+  JNIEnv* env = GetJNIForThread();
+
+  if (mSurfaceTexture) {
+    mozilla::widget::android::GeckoAppShell::UnregisterSurfaceTextureFrameListener(mSurfaceTexture);
+
+    env->DeleteGlobalRef(mSurfaceTexture);
+    mSurfaceTexture = nullptr;
+  }
+}
+
+void*
+nsSurfaceTexture::GetNativeWindow()
+{
+  return mNativeWindow;
+}
+
+void
+nsSurfaceTexture::UpdateTexImage()
+{
+  sJNIFunctions.UpdateTexImage(mSurfaceTexture);
+}
+
+bool
+nsSurfaceTexture::GetTransformMatrix(gfx::Matrix4x4& aMatrix)
+{
+  return sJNIFunctions.GetTransformMatrix(mSurfaceTexture, aMatrix);
+}
+
+void
+nsSurfaceTexture::SetFrameAvailableCallback(nsIRunnable* aRunnable)
+{
+  if (aRunnable)
+    mozilla::widget::android::GeckoAppShell::RegisterSurfaceTextureFrameListener(mSurfaceTexture, mID);
+  else
+    mozilla::widget::android::GeckoAppShell::UnregisterSurfaceTextureFrameListener(mSurfaceTexture);
+
+  mFrameAvailableCallback = aRunnable;
+}
+
+void
+nsSurfaceTexture::NotifyFrameAvailable()
+{
+  if (mFrameAvailableCallback) {
+    // Proxy to main thread if we aren't on it
+    if (!NS_IsMainThread()) {
+      // Proxy to main thread 
+      nsCOMPtr<nsIRunnable> event = NS_NewRunnableMethod(this, &nsSurfaceTexture::NotifyFrameAvailable);
+      NS_DispatchToCurrentThread(event);
+    } else {
+      mFrameAvailableCallback->Run();
+    }
+  }
+}
+
+#endif // MOZ_WIDGET_ANDROID