1 files changed, 268 insertions, 0 deletions
diff --git a/gfx/gl/SharedSurfaceEGL.cpp b/gfx/gl/SharedSurfaceEGL.cpp
new file mode 100644
index 0000000000..09659ba519
--- /dev/null
+++ b/gfx/gl/SharedSurfaceEGL.cpp
@@ -0,0 +1,268 @@
+/* -*- Mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; tab-width: 4; -*- */
+/* 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/. */
+
+#include "SharedSurfaceEGL.h"
+
+#include "GLBlitHelper.h"
+#include "GLContextEGL.h"
+#include "GLContextProvider.h"
+#include "GLLibraryEGL.h"
+#include "GLReadTexImageHelper.h"
+#include "MozFramebuffer.h"
+#include "mozilla/layers/LayersSurfaces.h"  // for SurfaceDescriptor, etc
+#include "SharedSurface.h"
+
+#if defined(MOZ_WIDGET_ANDROID)
+#  include "AndroidNativeWindow.h"
+#  include "mozilla/java/SurfaceAllocatorWrappers.h"
+#  include "mozilla/java/GeckoSurfaceTextureWrappers.h"
+#endif  // defined(MOZ_WIDGET_ANDROID)
+
+namespace mozilla {
+namespace gl {
+
+static bool HasEglImageExtensions(const GLContextEGL& gl) {
+  const auto& egl = *(gl.mEgl);
+  return egl.HasKHRImageBase() &&
+         egl.IsExtensionSupported(EGLExtension::KHR_gl_texture_2D_image) &&
+         (gl.IsExtensionSupported(GLContext::OES_EGL_image_external) ||
+          gl.IsExtensionSupported(GLContext::OES_EGL_image));
+}
+
+/*static*/
+UniquePtr<SurfaceFactory_EGLImage> SurfaceFactory_EGLImage::Create(
+    GLContext& gl_) {
+  auto& gl = *GLContextEGL::Cast(&gl_);
+  if (!HasEglImageExtensions(gl)) return nullptr;
+
+  const auto partialDesc = PartialSharedSurfaceDesc{
+      &gl, SharedSurfaceType::EGLImageShare, layers::TextureType::EGLImage,
+      false,  // Can't recycle, as mSync changes never update TextureHost.
+  };
+  return AsUnique(new SurfaceFactory_EGLImage(partialDesc));
+}
+
+// -
+
+/*static*/
+UniquePtr<SharedSurface_EGLImage> SharedSurface_EGLImage::Create(
+    const SharedSurfaceDesc& desc) {
+  const auto& gle = GLContextEGL::Cast(desc.gl);
+  const auto& context = gle->mContext;
+  const auto& egl = *(gle->mEgl);
+
+  auto fb = MozFramebuffer::Create(desc.gl, desc.size, 0, false);
+  if (!fb) return nullptr;
+
+  const auto buffer = reinterpret_cast<EGLClientBuffer>(fb->ColorTex());
+  const auto image =
+      egl.fCreateImage(context, LOCAL_EGL_GL_TEXTURE_2D, buffer, nullptr);
+  if (!image) return nullptr;
+
+  return AsUnique(new SharedSurface_EGLImage(desc, std::move(fb), image));
+}
+
+SharedSurface_EGLImage::SharedSurface_EGLImage(const SharedSurfaceDesc& desc,
+                                               UniquePtr<MozFramebuffer>&& fb,
+                                               const EGLImage image)
+    : SharedSurface(desc, std::move(fb)),
+      mMutex("SharedSurface_EGLImage mutex"),
+      mImage(image) {}
+
+SharedSurface_EGLImage::~SharedSurface_EGLImage() {
+  const auto& gle = GLContextEGL::Cast(mDesc.gl);
+  const auto& egl = gle->mEgl;
+  egl->fDestroyImage(mImage);
+
+  if (mSync) {
+    // We can't call this unless we have the ext, but we will always have
+    // the ext if we have something to destroy.
+    egl->fDestroySync(mSync);
+    mSync = 0;
+  }
+}
+
+void SharedSurface_EGLImage::ProducerReleaseImpl() {
+  const auto& gl = GLContextEGL::Cast(mDesc.gl);
+  const auto& egl = gl->mEgl;
+
+  MutexAutoLock lock(mMutex);
+  gl->MakeCurrent();
+
+  if (egl->IsExtensionSupported(EGLExtension::KHR_fence_sync) &&
+      gl->IsExtensionSupported(GLContext::OES_EGL_sync)) {
+    if (mSync) {
+      MOZ_RELEASE_ASSERT(false, "GFX: Non-recycleable should not Fence twice.");
+      MOZ_ALWAYS_TRUE(egl->fDestroySync(mSync));
+      mSync = 0;
+    }
+
+    mSync = egl->fCreateSync(LOCAL_EGL_SYNC_FENCE, nullptr);
+    if (mSync) {
+      gl->fFlush();
+      return;
+    }
+  }
+
+  MOZ_ASSERT(!mSync);
+  gl->fFinish();
+}
+
+void SharedSurface_EGLImage::ProducerReadAcquireImpl() {
+  const auto& gle = GLContextEGL::Cast(mDesc.gl);
+  const auto& egl = gle->mEgl;
+  // Wait on the fence, because presumably we're going to want to read this
+  // surface
+  if (mSync) {
+    egl->fClientWaitSync(mSync, 0, LOCAL_EGL_FOREVER);
+  }
+}
+
+Maybe<layers::SurfaceDescriptor> SharedSurface_EGLImage::ToSurfaceDescriptor() {
+  return Some(layers::EGLImageDescriptor((uintptr_t)mImage, (uintptr_t)mSync,
+                                         mDesc.size, true));
+}
+
+////////////////////////////////////////////////////////////////////////
+
+#ifdef MOZ_WIDGET_ANDROID
+
+/*static*/
+UniquePtr<SharedSurface_SurfaceTexture> SharedSurface_SurfaceTexture::Create(
+    const SharedSurfaceDesc& desc) {
+  const auto& size = desc.size;
+
+  jni::Object::LocalRef surfaceObj;
+  const bool useSingleBuffer =
+      desc.gl->Renderer() != GLRenderer::AndroidEmulator;
+
+  if (useSingleBuffer) {
+    surfaceObj =
+        java::SurfaceAllocator::AcquireSurface(size.width, size.height, true);
+  }
+
+  if (!surfaceObj) {
+    // Try multi-buffer mode
+    surfaceObj =
+        java::SurfaceAllocator::AcquireSurface(size.width, size.height, false);
+  }
+
+  if (!surfaceObj) {
+    // Give up
+    NS_WARNING("Failed to allocate SurfaceTexture!");
+    return nullptr;
+  }
+  const auto surface = java::GeckoSurface::Ref::From(surfaceObj);
+
+  AndroidNativeWindow window(surface);
+  const auto& gle = GLContextEGL::Cast(desc.gl);
+  MOZ_ASSERT(gle);
+  const auto eglSurface = gle->CreateCompatibleSurface(window.NativeWindow());
+  if (!eglSurface) return nullptr;
+
+  return AsUnique(new SharedSurface_SurfaceTexture(desc, surface, eglSurface));
+}
+
+SharedSurface_SurfaceTexture::SharedSurface_SurfaceTexture(
+    const SharedSurfaceDesc& desc, java::GeckoSurface::Param surface,
+    const EGLSurface eglSurface)
+    : SharedSurface(desc, nullptr),
+      mSurface(surface),
+      mEglSurface(eglSurface),
+      mEglDisplay(GLContextEGL::Cast(desc.gl)->mEgl) {}
+
+SharedSurface_SurfaceTexture::~SharedSurface_SurfaceTexture() {
+  if (mOrigEglSurface) {
+    // We are about to destroy mEglSurface.
+    // Make sure gl->SetEGLSurfaceOverride() doesn't keep a reference
+    // to the surface.
+    UnlockProd();
+  }
+
+  std::shared_ptr<EglDisplay> display = mEglDisplay.lock();
+  if (display) {
+    display->fDestroySurface(mEglSurface);
+  }
+  java::SurfaceAllocator::DisposeSurface(mSurface);
+}
+
+void SharedSurface_SurfaceTexture::LockProdImpl() {
+  MOZ_RELEASE_ASSERT(mSurface->GetAvailable());
+
+  GLContextEGL* gl = GLContextEGL::Cast(mDesc.gl);
+  mOrigEglSurface = gl->GetEGLSurfaceOverride();
+  gl->SetEGLSurfaceOverride(mEglSurface);
+}
+
+void SharedSurface_SurfaceTexture::UnlockProdImpl() {
+  MOZ_RELEASE_ASSERT(mSurface->GetAvailable());
+
+  GLContextEGL* gl = GLContextEGL::Cast(mDesc.gl);
+  MOZ_ASSERT(gl->GetEGLSurfaceOverride() == mEglSurface);
+
+  gl->SetEGLSurfaceOverride(mOrigEglSurface);
+  mOrigEglSurface = nullptr;
+}
+
+void SharedSurface_SurfaceTexture::ProducerReadReleaseImpl() {
+  // This GeckoSurfaceTexture is not SurfaceTexture of this class's GeckoSurface
+  // when current process is content process. In this case, SurfaceTexture of
+  // this class's GeckoSurface does not exist in this process. It exists in
+  // compositor's process. Then GeckoSurfaceTexture in this process is a sync
+  // surface that copies back the SurfaceTextrure from compositor's process. It
+  // was added by Bug 1486659. Then SurfaceTexture::UpdateTexImage() becomes
+  // very heavy weight, since it does copy back the SurfaceTextrure from
+  // compositor's process.
+  java::GeckoSurfaceTexture::LocalRef surfaceTexture =
+      java::GeckoSurfaceTexture::Lookup(mSurface->GetHandle());
+  if (!surfaceTexture) {
+    NS_ERROR("Didn't find GeckoSurfaceTexture in ProducerReadReleaseImpl");
+    return;
+  }
+  surfaceTexture->UpdateTexImage();
+  // Non single buffer mode Surface does not need ReleaseTexImage() call.
+  // When SurfaceTexture is sync Surface, it might not be single buffer mode.
+  if (surfaceTexture->IsSingleBuffer()) {
+    surfaceTexture->ReleaseTexImage();
+  }
+}
+
+void SharedSurface_SurfaceTexture::Commit() {
+  MOZ_RELEASE_ASSERT(mSurface->GetAvailable());
+
+  LockProdImpl();
+  mDesc.gl->SwapBuffers();
+  UnlockProdImpl();
+  mSurface->SetAvailable(false);
+}
+
+void SharedSurface_SurfaceTexture::WaitForBufferOwnership() {
+  mSurface->SetAvailable(true);
+}
+
+bool SharedSurface_SurfaceTexture::IsBufferAvailable() const {
+  return mSurface->GetAvailable();
+}
+
+bool SharedSurface_SurfaceTexture::IsValid() const {
+  return !mSurface->IsReleased();
+}
+
+Maybe<layers::SurfaceDescriptor>
+SharedSurface_SurfaceTexture::ToSurfaceDescriptor() {
+  return Some(layers::SurfaceTextureDescriptor(
+      mSurface->GetHandle(), mDesc.size, gfx::SurfaceFormat::R8G8B8A8,
+      false /* NOT continuous */, Nothing() /* Do not override transform */));
+}
+
+SurfaceFactory_SurfaceTexture::SurfaceFactory_SurfaceTexture(GLContext& gl)
+    : SurfaceFactory({&gl, SharedSurfaceType::AndroidSurfaceTexture,
+                      layers::TextureType::AndroidNativeWindow, true}) {}
+
+#endif  // MOZ_WIDGET_ANDROID
+
+}  // namespace gl
+
+} /* namespace mozilla */