1 files changed, 260 insertions, 0 deletions
diff --git a/gfx/gl/AndroidSurfaceTexture.cpp b/gfx/gl/AndroidSurfaceTexture.cpp
new file mode 100644
index 000000000..3c8c81974
--- /dev/null
+++ b/gfx/gl/AndroidSurfaceTexture.cpp
@@ -0,0 +1,260 @@
+/* -*- 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 <map>
+#include <android/native_window_jni.h>
+#include <android/log.h>
+#include "AndroidSurfaceTexture.h"
+#include "gfxImageSurface.h"
+#include "gfxPrefs.h"
+#include "AndroidBridge.h"
+#include "nsThreadUtils.h"
+#include "mozilla/gfx/Matrix.h"
+#include "GeneratedJNINatives.h"
+#include "GLContext.h"
+
+using namespace mozilla;
+
+namespace mozilla {
+namespace gl {
+
+class AndroidSurfaceTexture::Listener
+  : public java::SurfaceTextureListener::Natives<Listener>
+{
+  using Base = java::SurfaceTextureListener::Natives<Listener>;
+
+  const nsCOMPtr<nsIRunnable> mCallback;
+
+public:
+  using Base::AttachNative;
+  using Base::DisposeNative;
+
+  Listener(nsIRunnable* aCallback) : mCallback(aCallback) {}
+
+  void OnFrameAvailable()
+  {
+    if (NS_IsMainThread()) {
+      mCallback->Run();
+      return;
+    }
+    NS_DispatchToMainThread(mCallback);
+  }
+};
+
+already_AddRefed<AndroidSurfaceTexture>
+AndroidSurfaceTexture::Create()
+{
+  return Create(nullptr, 0);
+}
+
+already_AddRefed<AndroidSurfaceTexture>
+AndroidSurfaceTexture::Create(GLContext* aContext, GLuint aTexture)
+{
+  RefPtr<AndroidSurfaceTexture> st = new AndroidSurfaceTexture();
+  if (!st->Init(aContext, aTexture)) {
+    printf_stderr("Failed to initialize AndroidSurfaceTexture");
+    st = nullptr;
+  }
+
+  return st.forget();
+}
+
+nsresult
+AndroidSurfaceTexture::Attach(GLContext* aContext, PRIntervalTime aTimeout)
+{
+  MonitorAutoLock lock(mMonitor);
+
+  if (mAttachedContext == aContext) {
+    NS_WARNING("Tried to attach same GLContext to AndroidSurfaceTexture");
+    return NS_OK;
+  }
+
+  if (!CanDetach()) {
+    return NS_ERROR_NOT_AVAILABLE;
+  }
+
+  while (mAttachedContext) {
+    // Wait until it's detached (or we time out)
+    if (NS_FAILED(lock.Wait(aTimeout))) {
+      return NS_ERROR_NOT_AVAILABLE;
+    }
+  }
+
+  MOZ_ASSERT(aContext->IsOwningThreadCurrent(), "Trying to attach GLContext from different thread");
+
+  aContext->fGenTextures(1, &mTexture);
+
+  if (NS_FAILED(mSurfaceTexture->AttachToGLContext(mTexture))) {
+    return NS_ERROR_NOT_AVAILABLE;
+  }
+  mAttachedContext = aContext;
+  mAttachedContext->MakeCurrent();
+
+  return NS_OK;
+}
+
+nsresult
+AndroidSurfaceTexture::Detach()
+{
+  MonitorAutoLock lock(mMonitor);
+
+  if (!CanDetach() ||
+      !mAttachedContext ||
+      !mAttachedContext->IsOwningThreadCurrent())
+  {
+    return NS_ERROR_FAILURE;
+  }
+
+  mAttachedContext->MakeCurrent();
+
+  mSurfaceTexture->DetachFromGLContext();
+
+  mTexture = 0;
+  mAttachedContext = nullptr;
+  lock.NotifyAll();
+  return NS_OK;
+}
+
+bool
+AndroidSurfaceTexture::CanDetach() const
+{
+  // The API for attach/detach only exists on 16+, and PowerVR has some sort of
+  // fencing issue. Additionally, attach/detach seems to be busted on at least
+  // some Mali adapters (400MP2 for sure, bug 1131793)
+  return AndroidBridge::Bridge()->GetAPIVersion() >= 16 &&
+    (!mAttachedContext || mAttachedContext->Vendor() != GLVendor::Imagination) &&
+    (!mAttachedContext || mAttachedContext->Vendor() != GLVendor::ARM /* Mali */) &&
+    gfxPrefs::SurfaceTextureDetachEnabled();
+}
+
+bool
+AndroidSurfaceTexture::Init(GLContext* aContext, GLuint aTexture)
+{
+
+  if (!aTexture && !CanDetach()) {
+    // We have no texture and cannot initialize detached, bail out
+    return false;
+  }
+
+  if (NS_WARN_IF(NS_FAILED(
+      java::sdk::SurfaceTexture::New(aTexture, ReturnTo(&mSurfaceTexture))))) {
+    return false;
+  }
+
+  if (!aTexture) {
+    mSurfaceTexture->DetachFromGLContext();
+  }
+
+  mAttachedContext = aContext;
+
+  if (NS_WARN_IF(NS_FAILED(
+      java::sdk::Surface::New(mSurfaceTexture, ReturnTo(&mSurface))))) {
+    return false;
+  }
+
+  mNativeWindow = ANativeWindow_fromSurface(jni::GetEnvForThread(),
+                                            mSurface.Get());
+  MOZ_ASSERT(mNativeWindow, "Failed to create native window from surface");
+
+  return true;
+}
+
+AndroidSurfaceTexture::AndroidSurfaceTexture()
+  : mTexture(0)
+  , mSurfaceTexture()
+  , mSurface()
+  , mAttachedContext(nullptr)
+  , mMonitor("AndroidSurfaceTexture")
+{
+}
+
+AndroidSurfaceTexture::~AndroidSurfaceTexture()
+{
+  if (mSurfaceTexture) {
+    SetFrameAvailableCallback(nullptr);
+    mSurfaceTexture = nullptr;
+  }
+
+  if (mNativeWindow) {
+    ANativeWindow_release(mNativeWindow);
+    mNativeWindow = nullptr;
+  }
+}
+
+void
+AndroidSurfaceTexture::UpdateTexImage()
+{
+  mSurfaceTexture->UpdateTexImage();
+}
+
+void
+AndroidSurfaceTexture::GetTransformMatrix(gfx::Matrix4x4& aMatrix) const
+{
+  JNIEnv* const env = jni::GetEnvForThread();
+
+  auto jarray = jni::FloatArray::LocalRef::Adopt(env, env->NewFloatArray(16));
+  mSurfaceTexture->GetTransformMatrix(jarray);
+
+  jfloat* array = env->GetFloatArrayElements(jarray.Get(), 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.Get(), array, 0);
+}
+
+void
+AndroidSurfaceTexture::SetFrameAvailableCallback(nsIRunnable* aRunnable)
+{
+  java::SurfaceTextureListener::LocalRef newListener;
+
+  if (aRunnable) {
+    newListener = java::SurfaceTextureListener::New();
+    Listener::AttachNative(newListener, MakeUnique<Listener>(aRunnable));
+  }
+
+  if (aRunnable || mListener) {
+    MOZ_ALWAYS_TRUE(NS_SUCCEEDED(
+        mSurfaceTexture->SetOnFrameAvailableListener(newListener)));
+  }
+
+  if (mListener) {
+    Listener::DisposeNative(java::SurfaceTextureListener::LocalRef(
+        newListener.Env(), mListener));
+  }
+
+  mListener = newListener;
+}
+
+void
+AndroidSurfaceTexture::SetDefaultSize(mozilla::gfx::IntSize size)
+{
+  mSurfaceTexture->SetDefaultBufferSize(size.width, size.height);
+}
+
+} // gl
+} // mozilla
+
+#endif // MOZ_WIDGET_ANDROID