1 files changed, 246 insertions, 0 deletions
diff --git a/gfx/webrender_bindings/RenderAndroidHardwareBufferTextureHost.cpp b/gfx/webrender_bindings/RenderAndroidHardwareBufferTextureHost.cpp
new file mode 100644
index 0000000000..7b4db85f4b
--- /dev/null
+++ b/gfx/webrender_bindings/RenderAndroidHardwareBufferTextureHost.cpp
@@ -0,0 +1,246 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* 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 "RenderAndroidHardwareBufferTextureHost.h"
+
+#include "mozilla/layers/AndroidHardwareBuffer.h"
+#include "mozilla/webrender/RenderThread.h"
+#include "GLContextEGL.h"
+#include "GLLibraryEGL.h"
+#include "GLReadTexImageHelper.h"
+#include "OGLShaderConfig.h"
+
+namespace mozilla {
+namespace wr {
+
+RenderAndroidHardwareBufferTextureHost::RenderAndroidHardwareBufferTextureHost(
+    layers::AndroidHardwareBuffer* aAndroidHardwareBuffer)
+    : mAndroidHardwareBuffer(aAndroidHardwareBuffer),
+      mEGLImage(EGL_NO_IMAGE),
+      mTextureHandle(0) {
+  MOZ_ASSERT(mAndroidHardwareBuffer);
+  MOZ_COUNT_CTOR_INHERITED(RenderAndroidHardwareBufferTextureHost,
+                           RenderTextureHost);
+}
+
+RenderAndroidHardwareBufferTextureHost::
+    ~RenderAndroidHardwareBufferTextureHost() {
+  MOZ_COUNT_DTOR_INHERITED(RenderAndroidHardwareBufferTextureHost,
+                           RenderTextureHost);
+  DeleteTextureHandle();
+  DestroyEGLImage();
+}
+
+gfx::IntSize RenderAndroidHardwareBufferTextureHost::GetSize() const {
+  if (mAndroidHardwareBuffer) {
+    return mAndroidHardwareBuffer->mSize;
+  }
+  return gfx::IntSize();
+}
+
+bool RenderAndroidHardwareBufferTextureHost::EnsureLockable() {
+  if (!mAndroidHardwareBuffer) {
+    return false;
+  }
+
+  auto fenceFd = mAndroidHardwareBuffer->GetAndResetAcquireFence();
+  if (fenceFd.IsValid()) {
+    const auto& gle = gl::GLContextEGL::Cast(mGL);
+    const auto& egl = gle->mEgl;
+
+    auto rawFD = fenceFd.TakePlatformHandle();
+    const EGLint attribs[] = {LOCAL_EGL_SYNC_NATIVE_FENCE_FD_ANDROID,
+                              rawFD.get(), LOCAL_EGL_NONE};
+
+    EGLSync sync =
+        egl->fCreateSync(LOCAL_EGL_SYNC_NATIVE_FENCE_ANDROID, attribs);
+    if (sync) {
+      // Release fd here, since it is owned by EGLSync
+      Unused << rawFD.release();
+
+      if (egl->IsExtensionSupported(gl::EGLExtension::KHR_wait_sync)) {
+        egl->fWaitSync(sync, 0);
+      } else {
+        egl->fClientWaitSync(sync, 0, LOCAL_EGL_FOREVER);
+      }
+      egl->fDestroySync(sync);
+    } else {
+      gfxCriticalNote << "Failed to create EGLSync from acquire fence fd";
+    }
+  }
+
+  if (mTextureHandle) {
+    return true;
+  }
+
+  if (!mEGLImage) {
+    // XXX add crop handling for video
+    // Should only happen the first time.
+    const auto& gle = gl::GLContextEGL::Cast(mGL);
+    const auto& egl = gle->mEgl;
+
+    const EGLint attrs[] = {
+        LOCAL_EGL_IMAGE_PRESERVED,
+        LOCAL_EGL_TRUE,
+        LOCAL_EGL_NONE,
+        LOCAL_EGL_NONE,
+    };
+
+    EGLClientBuffer clientBuffer = egl->mLib->fGetNativeClientBufferANDROID(
+        mAndroidHardwareBuffer->GetNativeBuffer());
+    mEGLImage = egl->fCreateImage(
+        EGL_NO_CONTEXT, LOCAL_EGL_NATIVE_BUFFER_ANDROID, clientBuffer, attrs);
+  }
+  MOZ_ASSERT(mEGLImage);
+
+  mGL->fGenTextures(1, &mTextureHandle);
+  mGL->fBindTexture(LOCAL_GL_TEXTURE_EXTERNAL, mTextureHandle);
+  mGL->fTexParameteri(LOCAL_GL_TEXTURE_EXTERNAL, LOCAL_GL_TEXTURE_WRAP_T,
+                      LOCAL_GL_CLAMP_TO_EDGE);
+  mGL->fTexParameteri(LOCAL_GL_TEXTURE_EXTERNAL, LOCAL_GL_TEXTURE_WRAP_S,
+                      LOCAL_GL_CLAMP_TO_EDGE);
+  mGL->fEGLImageTargetTexture2D(LOCAL_GL_TEXTURE_EXTERNAL, mEGLImage);
+
+  ActivateBindAndTexParameteri(mGL, LOCAL_GL_TEXTURE0,
+                               LOCAL_GL_TEXTURE_EXTERNAL_OES, mTextureHandle);
+  return true;
+}
+
+wr::WrExternalImage RenderAndroidHardwareBufferTextureHost::Lock(
+    uint8_t aChannelIndex, gl::GLContext* aGL) {
+  MOZ_ASSERT(aChannelIndex == 0);
+
+  if (mGL.get() != aGL) {
+    if (mGL) {
+      // This should not happen.
+      MOZ_ASSERT_UNREACHABLE("Unexpected GL context");
+      return InvalidToWrExternalImage();
+    }
+    mGL = aGL;
+  }
+
+  if (!mGL || !mGL->MakeCurrent()) {
+    return InvalidToWrExternalImage();
+  }
+
+  if (!EnsureLockable()) {
+    return InvalidToWrExternalImage();
+  }
+
+  const auto uvs = GetUvCoords(GetSize());
+  return NativeTextureToWrExternalImage(
+      mTextureHandle, uvs.first.x, uvs.first.y, uvs.second.x, uvs.second.y);
+}
+
+void RenderAndroidHardwareBufferTextureHost::Unlock() {}
+
+size_t RenderAndroidHardwareBufferTextureHost::Bytes() {
+  return GetSize().width * GetSize().height *
+         BytesPerPixel(mAndroidHardwareBuffer->mFormat);
+}
+
+void RenderAndroidHardwareBufferTextureHost::DeleteTextureHandle() {
+  if (!mTextureHandle) {
+    return;
+  }
+  MOZ_ASSERT(mGL);
+  mGL->fDeleteTextures(1, &mTextureHandle);
+  mTextureHandle = 0;
+}
+
+void RenderAndroidHardwareBufferTextureHost::DestroyEGLImage() {
+  if (!mEGLImage) {
+    return;
+  }
+  MOZ_ASSERT(mGL);
+  const auto& gle = gl::GLContextEGL::Cast(mGL);
+  const auto& egl = gle->mEgl;
+  egl->fDestroyImage(mEGLImage);
+  mEGLImage = EGL_NO_IMAGE;
+}
+
+gfx::SurfaceFormat RenderAndroidHardwareBufferTextureHost::GetFormat() const {
+  MOZ_ASSERT(mAndroidHardwareBuffer->mFormat == gfx::SurfaceFormat::R8G8B8A8 ||
+             mAndroidHardwareBuffer->mFormat == gfx::SurfaceFormat::R8G8B8X8);
+
+  if (mAndroidHardwareBuffer->mFormat == gfx::SurfaceFormat::R8G8B8A8) {
+    return gfx::SurfaceFormat::B8G8R8A8;
+  }
+
+  if (mAndroidHardwareBuffer->mFormat == gfx::SurfaceFormat::R8G8B8X8) {
+    return gfx::SurfaceFormat::B8G8R8X8;
+  }
+
+  gfxCriticalNoteOnce
+      << "Unexpected color format of RenderAndroidSurfaceTextureHost";
+
+  return gfx::SurfaceFormat::UNKNOWN;
+}
+
+already_AddRefed<DataSourceSurface>
+RenderAndroidHardwareBufferTextureHost::ReadTexImage() {
+  if (!mGL) {
+    mGL = RenderThread::Get()->SingletonGL();
+    if (!mGL) {
+      return nullptr;
+    }
+  }
+
+  if (!EnsureLockable()) {
+    return nullptr;
+  }
+
+  /* Allocate resulting image surface */
+  int32_t stride = GetSize().width * BytesPerPixel(GetFormat());
+  RefPtr<DataSourceSurface> surf = Factory::CreateDataSourceSurfaceWithStride(
+      GetSize(), GetFormat(), stride);
+  if (!surf) {
+    return nullptr;
+  }
+
+  layers::ShaderConfigOGL config = layers::ShaderConfigFromTargetAndFormat(
+      LOCAL_GL_TEXTURE_EXTERNAL, mAndroidHardwareBuffer->mFormat);
+  int shaderConfig = config.mFeatures;
+
+  bool ret = mGL->ReadTexImageHelper()->ReadTexImage(
+      surf, mTextureHandle, LOCAL_GL_TEXTURE_EXTERNAL, GetSize(), shaderConfig,
+      /* aYInvert */ false);
+  if (!ret) {
+    return nullptr;
+  }
+
+  return surf.forget();
+}
+
+bool RenderAndroidHardwareBufferTextureHost::MapPlane(
+    RenderCompositor* aCompositor, uint8_t aChannelIndex,
+    PlaneInfo& aPlaneInfo) {
+  RefPtr<gfx::DataSourceSurface> readback = ReadTexImage();
+  if (!readback) {
+    return false;
+  }
+
+  DataSourceSurface::MappedSurface map;
+  if (!readback->Map(DataSourceSurface::MapType::READ, &map)) {
+    return false;
+  }
+
+  mReadback = readback;
+  aPlaneInfo.mSize = GetSize();
+  aPlaneInfo.mStride = map.mStride;
+  aPlaneInfo.mData = map.mData;
+  return true;
+}
+
+void RenderAndroidHardwareBufferTextureHost::UnmapPlanes() {
+  if (mReadback) {
+    mReadback->Unmap();
+    mReadback = nullptr;
+  }
+}
+
+}  // namespace wr
+}  // namespace mozilla