Adding upstream version 115.7.0esr.upstream/115.7.0esrupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 672 insertions, 0 deletions

diff --git a/gfx/webrender_bindings/RenderCompositorNative.cpp b/gfx/webrender_bindings/RenderCompositorNative.cpp
new file mode 100644
index 0000000000..81cafd1fd6
--- /dev/null
+++ b/gfx/webrender_bindings/RenderCompositorNative.cpp
@@ -0,0 +1,672 @@
+/* -*- 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 "RenderCompositorNative.h"
+
+#include "GLContext.h"
+#include "GLContextProvider.h"
+#include "mozilla/ProfilerLabels.h"
+#include "mozilla/ProfilerMarkers.h"
+#include "mozilla/gfx/gfxVars.h"
+#include "mozilla/gfx/Logging.h"
+#include "mozilla/layers/CompositionRecorder.h"
+#include "mozilla/layers/NativeLayer.h"
+#include "mozilla/layers/SurfacePool.h"
+#include "mozilla/StaticPrefs_gfx.h"
+#include "mozilla/webrender/RenderThread.h"
+#include "mozilla/widget/CompositorWidget.h"
+#include "RenderCompositorRecordedFrame.h"
+
+namespace mozilla::wr {
+
+extern LazyLogModule gRenderThreadLog;
+#define LOG(...) MOZ_LOG(gRenderThreadLog, LogLevel::Debug, (__VA_ARGS__))
+
+RenderCompositorNative::RenderCompositorNative(
+    const RefPtr<widget::CompositorWidget>& aWidget, gl::GLContext* aGL)
+    : RenderCompositor(aWidget),
+      mNativeLayerRoot(GetWidget()->GetNativeLayerRoot()) {
+  LOG("RenderCompositorNative::RenderCompositorNative()");
+
+#if defined(XP_MACOSX) || defined(MOZ_WAYLAND)
+  auto pool = RenderThread::Get()->SharedSurfacePool();
+  if (pool) {
+    mSurfacePoolHandle = pool->GetHandleForGL(aGL);
+  }
+#endif
+  MOZ_RELEASE_ASSERT(mSurfacePoolHandle);
+}
+
+RenderCompositorNative::~RenderCompositorNative() {
+  LOG("RRenderCompositorNative::~RenderCompositorNative()");
+
+  Pause();
+  mProfilerScreenshotGrabber.Destroy();
+  mNativeLayerRoot->SetLayers({});
+  mNativeLayerForEntireWindow = nullptr;
+  mNativeLayerRootSnapshotter = nullptr;
+  mNativeLayerRoot = nullptr;
+}
+
+bool RenderCompositorNative::BeginFrame() {
+  if (!MakeCurrent()) {
+    gfxCriticalNote << "Failed to make render context current, can't draw.";
+    return false;
+  }
+
+  gfx::IntSize bufferSize = GetBufferSize().ToUnknownSize();
+  if (!ShouldUseNativeCompositor()) {
+    if (bufferSize.IsEmpty()) {
+      return false;
+    }
+    if (mNativeLayerForEntireWindow &&
+        mNativeLayerForEntireWindow->GetSize() != bufferSize) {
+      mNativeLayerRoot->RemoveLayer(mNativeLayerForEntireWindow);
+      mNativeLayerForEntireWindow = nullptr;
+    }
+    if (!mNativeLayerForEntireWindow) {
+      mNativeLayerForEntireWindow =
+          mNativeLayerRoot->CreateLayer(bufferSize, false, mSurfacePoolHandle);
+      mNativeLayerRoot->AppendLayer(mNativeLayerForEntireWindow);
+    }
+  }
+
+  gfx::IntRect bounds({}, bufferSize);
+  if (!InitDefaultFramebuffer(bounds)) {
+    return false;
+  }
+
+  return true;
+}
+
+RenderedFrameId RenderCompositorNative::EndFrame(
+    const nsTArray<DeviceIntRect>& aDirtyRects) {
+  RenderedFrameId frameId = GetNextRenderFrameId();
+
+  DoSwap();
+
+  if (mNativeLayerForEntireWindow) {
+    mNativeLayerForEntireWindow->NotifySurfaceReady();
+    mNativeLayerRoot->CommitToScreen();
+  }
+
+  return frameId;
+}
+
+void RenderCompositorNative::Pause() {}
+
+bool RenderCompositorNative::Resume() { return true; }
+
+inline layers::WebRenderCompositor RenderCompositorNative::CompositorType()
+    const {
+  if (gfx::gfxVars::UseWebRenderCompositor()) {
+#if defined(XP_MACOSX)
+    return layers::WebRenderCompositor::CORE_ANIMATION;
+#elif defined(MOZ_WAYLAND)
+    return layers::WebRenderCompositor::WAYLAND;
+#endif
+  }
+  return layers::WebRenderCompositor::DRAW;
+}
+
+LayoutDeviceIntSize RenderCompositorNative::GetBufferSize() {
+  return mWidget->GetClientSize();
+}
+
+bool RenderCompositorNative::ShouldUseNativeCompositor() {
+  return gfx::gfxVars::UseWebRenderCompositor();
+}
+
+void RenderCompositorNative::GetCompositorCapabilities(
+    CompositorCapabilities* aCaps) {
+  RenderCompositor::GetCompositorCapabilities(aCaps);
+#if defined(XP_MACOSX)
+  aCaps->supports_surface_for_backdrop = !gfx::gfxVars::UseSoftwareWebRender();
+#endif
+}
+
+bool RenderCompositorNative::MaybeReadback(
+    const gfx::IntSize& aReadbackSize, const wr::ImageFormat& aReadbackFormat,
+    const Range<uint8_t>& aReadbackBuffer, bool* aNeedsYFlip) {
+  if (!ShouldUseNativeCompositor()) {
+    return false;
+  }
+
+  MOZ_RELEASE_ASSERT(aReadbackFormat == wr::ImageFormat::BGRA8);
+  if (!mNativeLayerRootSnapshotter) {
+    mNativeLayerRootSnapshotter = mNativeLayerRoot->CreateSnapshotter();
+
+    if (!mNativeLayerRootSnapshotter) {
+      return false;
+    }
+  }
+  bool success = mNativeLayerRootSnapshotter->ReadbackPixels(
+      aReadbackSize, gfx::SurfaceFormat::B8G8R8A8, aReadbackBuffer);
+
+  // ReadbackPixels might have changed the current context. Make sure GL is
+  // current again.
+  MakeCurrent();
+
+  if (aNeedsYFlip) {
+    *aNeedsYFlip = true;
+  }
+
+  return success;
+}
+
+bool RenderCompositorNative::MaybeRecordFrame(
+    layers::CompositionRecorder& aRecorder) {
+  if (!ShouldUseNativeCompositor()) {
+    return false;
+  }
+
+  if (!mNativeLayerRootSnapshotter) {
+    mNativeLayerRootSnapshotter = mNativeLayerRoot->CreateSnapshotter();
+  }
+
+  if (!mNativeLayerRootSnapshotter) {
+    return true;
+  }
+
+  gfx::IntSize size = GetBufferSize().ToUnknownSize();
+  RefPtr<layers::profiler_screenshots::RenderSource> snapshot =
+      mNativeLayerRootSnapshotter->GetWindowContents(size);
+  if (!snapshot) {
+    return true;
+  }
+
+  RefPtr<layers::profiler_screenshots::AsyncReadbackBuffer> buffer =
+      mNativeLayerRootSnapshotter->CreateAsyncReadbackBuffer(size);
+  buffer->CopyFrom(snapshot);
+
+  RefPtr<layers::RecordedFrame> frame =
+      new RenderCompositorRecordedFrame(TimeStamp::Now(), std::move(buffer));
+  aRecorder.RecordFrame(frame);
+
+  // GetWindowContents might have changed the current context. Make sure our
+  // context is current again.
+  MakeCurrent();
+  return true;
+}
+
+bool RenderCompositorNative::MaybeGrabScreenshot(
+    const gfx::IntSize& aWindowSize) {
+  if (!ShouldUseNativeCompositor()) {
+    return false;
+  }
+
+  if (!mNativeLayerRootSnapshotter) {
+    mNativeLayerRootSnapshotter = mNativeLayerRoot->CreateSnapshotter();
+  }
+
+  if (mNativeLayerRootSnapshotter) {
+    mProfilerScreenshotGrabber.MaybeGrabScreenshot(*mNativeLayerRootSnapshotter,
+                                                   aWindowSize);
+
+    // MaybeGrabScreenshot might have changed the current context. Make sure our
+    // context is current again.
+    MakeCurrent();
+  }
+
+  return true;
+}
+
+bool RenderCompositorNative::MaybeProcessScreenshotQueue() {
+  if (!ShouldUseNativeCompositor()) {
+    return false;
+  }
+
+  mProfilerScreenshotGrabber.MaybeProcessQueue();
+
+  // MaybeProcessQueue might have changed the current context. Make sure our
+  // context is current again.
+  MakeCurrent();
+
+  return true;
+}
+
+void RenderCompositorNative::CompositorBeginFrame() {
+  mAddedLayers.Clear();
+  mAddedTilePixelCount = 0;
+  mAddedClippedPixelCount = 0;
+  mBeginFrameTimeStamp = TimeStamp::Now();
+  mSurfacePoolHandle->OnBeginFrame();
+  mNativeLayerRoot->PrepareForCommit();
+}
+
+void RenderCompositorNative::CompositorEndFrame() {
+  if (profiler_thread_is_being_profiled_for_markers()) {
+    auto bufferSize = GetBufferSize();
+    [[maybe_unused]] uint64_t windowPixelCount =
+        uint64_t(bufferSize.width) * bufferSize.height;
+    int nativeLayerCount = 0;
+    for (const auto& it : mSurfaces) {
+      nativeLayerCount += int(it.second.mNativeLayers.size());
+    }
+    PROFILER_MARKER_TEXT(
+        "WR OS Compositor frame", GRAPHICS,
+        MarkerTiming::IntervalUntilNowFrom(mBeginFrameTimeStamp),
+        nsPrintfCString("%d%% painting, %d%% overdraw, %d used "
+                        "layers (%d%% memory) + %d unused layers (%d%% memory)",
+                        int(mDrawnPixelCount * 100 / windowPixelCount),
+                        int(mAddedClippedPixelCount * 100 / windowPixelCount),
+                        int(mAddedLayers.Length()),
+                        int(mAddedTilePixelCount * 100 / windowPixelCount),
+                        int(nativeLayerCount - mAddedLayers.Length()),
+                        int((mTotalTilePixelCount - mAddedTilePixelCount) *
+                            100 / windowPixelCount)));
+  }
+  mDrawnPixelCount = 0;
+
+  DoFlush();
+
+  mNativeLayerRoot->SetLayers(mAddedLayers);
+  mNativeLayerRoot->CommitToScreen();
+  mSurfacePoolHandle->OnEndFrame();
+}
+
+void RenderCompositorNative::BindNativeLayer(wr::NativeTileId aId,
+                                             const gfx::IntRect& aDirtyRect) {
+  MOZ_RELEASE_ASSERT(!mCurrentlyBoundNativeLayer);
+
+  auto surfaceCursor = mSurfaces.find(aId.surface_id);
+  MOZ_RELEASE_ASSERT(surfaceCursor != mSurfaces.end());
+  Surface& surface = surfaceCursor->second;
+
+  auto layerCursor = surface.mNativeLayers.find(TileKey(aId.x, aId.y));
+  MOZ_RELEASE_ASSERT(layerCursor != surface.mNativeLayers.end());
+  RefPtr<layers::NativeLayer> layer = layerCursor->second;
+
+  mCurrentlyBoundNativeLayer = layer;
+
+  mDrawnPixelCount += aDirtyRect.Area();
+}
+
+void RenderCompositorNative::UnbindNativeLayer() {
+  MOZ_RELEASE_ASSERT(mCurrentlyBoundNativeLayer);
+
+  mCurrentlyBoundNativeLayer->NotifySurfaceReady();
+  mCurrentlyBoundNativeLayer = nullptr;
+}
+
+void RenderCompositorNative::CreateSurface(wr::NativeSurfaceId aId,
+                                           wr::DeviceIntPoint aVirtualOffset,
+                                           wr::DeviceIntSize aTileSize,
+                                           bool aIsOpaque) {
+  MOZ_RELEASE_ASSERT(mSurfaces.find(aId) == mSurfaces.end());
+  mSurfaces.insert({aId, Surface{aTileSize, aIsOpaque}});
+}
+
+void RenderCompositorNative::CreateExternalSurface(wr::NativeSurfaceId aId,
+                                                   bool aIsOpaque) {
+  MOZ_RELEASE_ASSERT(mSurfaces.find(aId) == mSurfaces.end());
+
+  RefPtr<layers::NativeLayer> layer =
+      mNativeLayerRoot->CreateLayerForExternalTexture(aIsOpaque);
+
+  Surface surface{DeviceIntSize{}, aIsOpaque};
+  surface.mIsExternal = true;
+  surface.mNativeLayers.insert({TileKey(0, 0), layer});
+
+  mSurfaces.insert({aId, std::move(surface)});
+}
+
+void RenderCompositorNative::CreateBackdropSurface(wr::NativeSurfaceId aId,
+                                                   wr::ColorF aColor) {
+  MOZ_RELEASE_ASSERT(mSurfaces.find(aId) == mSurfaces.end());
+
+  gfx::DeviceColor color(aColor.r, aColor.g, aColor.b, aColor.a);
+  RefPtr<layers::NativeLayer> layer =
+      mNativeLayerRoot->CreateLayerForColor(color);
+
+  Surface surface{DeviceIntSize{}, (aColor.a >= 1.0f)};
+  surface.mNativeLayers.insert({TileKey(0, 0), layer});
+
+  mSurfaces.insert({aId, std::move(surface)});
+}
+
+void RenderCompositorNative::AttachExternalImage(
+    wr::NativeSurfaceId aId, wr::ExternalImageId aExternalImage) {
+  RenderTextureHost* image =
+      RenderThread::Get()->GetRenderTexture(aExternalImage);
+  MOZ_RELEASE_ASSERT(image);
+
+  auto surfaceCursor = mSurfaces.find(aId);
+  MOZ_RELEASE_ASSERT(surfaceCursor != mSurfaces.end());
+
+  Surface& surface = surfaceCursor->second;
+  MOZ_RELEASE_ASSERT(surface.mNativeLayers.size() == 1);
+  MOZ_RELEASE_ASSERT(surface.mIsExternal);
+  surface.mNativeLayers.begin()->second->AttachExternalImage(image);
+}
+
+void RenderCompositorNative::DestroySurface(NativeSurfaceId aId) {
+  auto surfaceCursor = mSurfaces.find(aId);
+  MOZ_RELEASE_ASSERT(surfaceCursor != mSurfaces.end());
+
+  Surface& surface = surfaceCursor->second;
+  if (!surface.mIsExternal) {
+    for (const auto& iter : surface.mNativeLayers) {
+      mTotalTilePixelCount -= gfx::IntRect({}, iter.second->GetSize()).Area();
+    }
+  }
+
+  mSurfaces.erase(surfaceCursor);
+}
+
+void RenderCompositorNative::CreateTile(wr::NativeSurfaceId aId, int aX,
+                                        int aY) {
+  auto surfaceCursor = mSurfaces.find(aId);
+  MOZ_RELEASE_ASSERT(surfaceCursor != mSurfaces.end());
+  Surface& surface = surfaceCursor->second;
+  MOZ_RELEASE_ASSERT(!surface.mIsExternal);
+
+  RefPtr<layers::NativeLayer> layer = mNativeLayerRoot->CreateLayer(
+      surface.TileSize(), surface.mIsOpaque, mSurfacePoolHandle);
+  surface.mNativeLayers.insert({TileKey(aX, aY), layer});
+  mTotalTilePixelCount += gfx::IntRect({}, layer->GetSize()).Area();
+}
+
+void RenderCompositorNative::DestroyTile(wr::NativeSurfaceId aId, int aX,
+                                         int aY) {
+  auto surfaceCursor = mSurfaces.find(aId);
+  MOZ_RELEASE_ASSERT(surfaceCursor != mSurfaces.end());
+  Surface& surface = surfaceCursor->second;
+  MOZ_RELEASE_ASSERT(!surface.mIsExternal);
+
+  auto layerCursor = surface.mNativeLayers.find(TileKey(aX, aY));
+  MOZ_RELEASE_ASSERT(layerCursor != surface.mNativeLayers.end());
+  RefPtr<layers::NativeLayer> layer = std::move(layerCursor->second);
+  surface.mNativeLayers.erase(layerCursor);
+  mTotalTilePixelCount -= gfx::IntRect({}, layer->GetSize()).Area();
+
+  // If the layer is currently present in mNativeLayerRoot, it will be destroyed
+  // once CompositorEndFrame() replaces mNativeLayerRoot's layers and drops that
+  // reference. So until that happens, the layer still needs to hold on to its
+  // front buffer. However, we can tell it to drop its back buffers now, because
+  // we know that we will never draw to it again.
+  // Dropping the back buffers now puts them back in the surface pool, so those
+  // surfaces can be immediately re-used for drawing in other layers in the
+  // current frame.
+  layer->DiscardBackbuffers();
+}
+
+gfx::SamplingFilter ToSamplingFilter(wr::ImageRendering aImageRendering) {
+  if (aImageRendering == wr::ImageRendering::Auto) {
+    return gfx::SamplingFilter::LINEAR;
+  }
+  return gfx::SamplingFilter::POINT;
+}
+
+void RenderCompositorNative::AddSurface(
+    wr::NativeSurfaceId aId, const wr::CompositorSurfaceTransform& aTransform,
+    wr::DeviceIntRect aClipRect, wr::ImageRendering aImageRendering) {
+  MOZ_RELEASE_ASSERT(!mCurrentlyBoundNativeLayer);
+
+  auto surfaceCursor = mSurfaces.find(aId);
+  MOZ_RELEASE_ASSERT(surfaceCursor != mSurfaces.end());
+  const Surface& surface = surfaceCursor->second;
+
+  float sx = aTransform.scale.x;
+  float sy = aTransform.scale.y;
+  float tx = aTransform.offset.x;
+  float ty = aTransform.offset.y;
+  gfx::Matrix4x4 transform(sx, 0.0, 0.0, 0.0, 0.0, sy, 0.0, 0.0, 0.0, 0.0, 1.0,
+                           0.0, tx, ty, 0.0, 1.0);
+
+  for (auto it = surface.mNativeLayers.begin();
+       it != surface.mNativeLayers.end(); ++it) {
+    RefPtr<layers::NativeLayer> layer = it->second;
+    gfx::IntSize layerSize = layer->GetSize();
+    gfx::IntPoint layerPosition(surface.mTileSize.width * it->first.mX,
+                                surface.mTileSize.height * it->first.mY);
+    layer->SetPosition(layerPosition);
+    gfx::IntRect clipRect(aClipRect.min.x, aClipRect.min.y, aClipRect.width(),
+                          aClipRect.height());
+    layer->SetClipRect(Some(clipRect));
+    layer->SetTransform(transform);
+    layer->SetSamplingFilter(ToSamplingFilter(aImageRendering));
+    mAddedLayers.AppendElement(layer);
+
+    if (!surface.mIsExternal) {
+      mAddedTilePixelCount += layerSize.width * layerSize.height;
+    }
+    gfx::Rect r = transform.TransformBounds(
+        gfx::Rect(layer->CurrentSurfaceDisplayRect()));
+    gfx::IntRect visibleRect =
+        clipRect.Intersect(RoundedToInt(r) + layerPosition);
+    mAddedClippedPixelCount += visibleRect.Area();
+  }
+}
+
+/* static */
+UniquePtr<RenderCompositor> RenderCompositorNativeOGL::Create(
+    const RefPtr<widget::CompositorWidget>& aWidget, nsACString& aError) {
+  RefPtr<gl::GLContext> gl = RenderThread::Get()->SingletonGL();
+  if (!gl) {
+    gl = gl::GLContextProvider::CreateForCompositorWidget(
+        aWidget, /* aHardwareWebRender */ true, /* aForceAccelerated */ true);
+    RenderThread::MaybeEnableGLDebugMessage(gl);
+  }
+  if (!gl || !gl->MakeCurrent()) {
+    gfxCriticalNote << "Failed GL context creation for WebRender: "
+                    << gfx::hexa(gl.get());
+    return nullptr;
+  }
+  return MakeUnique<RenderCompositorNativeOGL>(aWidget, std::move(gl));
+}
+
+RenderCompositorNativeOGL::RenderCompositorNativeOGL(
+    const RefPtr<widget::CompositorWidget>& aWidget,
+    RefPtr<gl::GLContext>&& aGL)
+    : RenderCompositorNative(aWidget, aGL), mGL(aGL) {
+  MOZ_ASSERT(mGL);
+}
+
+RenderCompositorNativeOGL::~RenderCompositorNativeOGL() {
+  if (!mGL->MakeCurrent()) {
+    gfxCriticalNote
+        << "Failed to make render context current during destroying.";
+    // Leak resources!
+    mPreviousFrameDoneSync = nullptr;
+    mThisFrameDoneSync = nullptr;
+    return;
+  }
+
+  if (mPreviousFrameDoneSync) {
+    mGL->fDeleteSync(mPreviousFrameDoneSync);
+  }
+  if (mThisFrameDoneSync) {
+    mGL->fDeleteSync(mThisFrameDoneSync);
+  }
+}
+
+bool RenderCompositorNativeOGL::InitDefaultFramebuffer(
+    const gfx::IntRect& aBounds) {
+  if (mNativeLayerForEntireWindow) {
+    Maybe<GLuint> fbo = mNativeLayerForEntireWindow->NextSurfaceAsFramebuffer(
+        aBounds, aBounds, true);
+    if (!fbo) {
+      return false;
+    }
+    mGL->fBindFramebuffer(LOCAL_GL_FRAMEBUFFER, *fbo);
+  } else {
+    mGL->fBindFramebuffer(LOCAL_GL_FRAMEBUFFER, mGL->GetDefaultFramebuffer());
+  }
+  return true;
+}
+
+void RenderCompositorNativeOGL::DoSwap() {
+  InsertFrameDoneSync();
+  if (mNativeLayerForEntireWindow) {
+    mGL->fFlush();
+  }
+}
+
+void RenderCompositorNativeOGL::DoFlush() { mGL->fFlush(); }
+
+void RenderCompositorNativeOGL::InsertFrameDoneSync() {
+#ifdef XP_MACOSX
+  // Only do this on macOS.
+  // On other platforms, SwapBuffers automatically applies back-pressure.
+  if (mThisFrameDoneSync) {
+    mGL->fDeleteSync(mThisFrameDoneSync);
+  }
+  mThisFrameDoneSync = mGL->fFenceSync(LOCAL_GL_SYNC_GPU_COMMANDS_COMPLETE, 0);
+#endif
+}
+
+bool RenderCompositorNativeOGL::WaitForGPU() {
+  if (mPreviousFrameDoneSync) {
+    AUTO_PROFILER_LABEL("Waiting for GPU to finish previous frame", GRAPHICS);
+    mGL->fClientWaitSync(mPreviousFrameDoneSync,
+                         LOCAL_GL_SYNC_FLUSH_COMMANDS_BIT,
+                         LOCAL_GL_TIMEOUT_IGNORED);
+    mGL->fDeleteSync(mPreviousFrameDoneSync);
+  }
+  mPreviousFrameDoneSync = mThisFrameDoneSync;
+  mThisFrameDoneSync = nullptr;
+
+  return true;
+}
+
+void RenderCompositorNativeOGL::Bind(wr::NativeTileId aId,
+                                     wr::DeviceIntPoint* aOffset,
+                                     uint32_t* aFboId,
+                                     wr::DeviceIntRect aDirtyRect,
+                                     wr::DeviceIntRect aValidRect) {
+  gfx::IntRect validRect(aValidRect.min.x, aValidRect.min.y, aValidRect.width(),
+                         aValidRect.height());
+  gfx::IntRect dirtyRect(aDirtyRect.min.x, aDirtyRect.min.y, aDirtyRect.width(),
+                         aDirtyRect.height());
+
+  BindNativeLayer(aId, dirtyRect);
+
+  Maybe<GLuint> fbo = mCurrentlyBoundNativeLayer->NextSurfaceAsFramebuffer(
+      validRect, dirtyRect, true);
+
+  *aFboId = *fbo;
+  *aOffset = wr::DeviceIntPoint{0, 0};
+}
+
+void RenderCompositorNativeOGL::Unbind() {
+  mGL->fBindFramebuffer(LOCAL_GL_FRAMEBUFFER, 0);
+
+  UnbindNativeLayer();
+}
+
+/* static */
+UniquePtr<RenderCompositor> RenderCompositorNativeSWGL::Create(
+    const RefPtr<widget::CompositorWidget>& aWidget, nsACString& aError) {
+  void* ctx = wr_swgl_create_context();
+  if (!ctx) {
+    gfxCriticalNote << "Failed SWGL context creation for WebRender";
+    return nullptr;
+  }
+  return MakeUnique<RenderCompositorNativeSWGL>(aWidget, ctx);
+}
+
+RenderCompositorNativeSWGL::RenderCompositorNativeSWGL(
+    const RefPtr<widget::CompositorWidget>& aWidget, void* aContext)
+    : RenderCompositorNative(aWidget), mContext(aContext) {
+  MOZ_ASSERT(mContext);
+}
+
+RenderCompositorNativeSWGL::~RenderCompositorNativeSWGL() {
+  wr_swgl_destroy_context(mContext);
+}
+
+bool RenderCompositorNativeSWGL::MakeCurrent() {
+  wr_swgl_make_current(mContext);
+  return true;
+}
+
+bool RenderCompositorNativeSWGL::InitDefaultFramebuffer(
+    const gfx::IntRect& aBounds) {
+  if (mNativeLayerForEntireWindow) {
+    if (!MapNativeLayer(mNativeLayerForEntireWindow, aBounds, aBounds)) {
+      return false;
+    }
+    wr_swgl_init_default_framebuffer(mContext, aBounds.x, aBounds.y,
+                                     aBounds.width, aBounds.height,
+                                     mLayerStride, mLayerValidRectData);
+  }
+  return true;
+}
+
+void RenderCompositorNativeSWGL::CancelFrame() {
+  if (mNativeLayerForEntireWindow && mLayerTarget) {
+    wr_swgl_init_default_framebuffer(mContext, 0, 0, 0, 0, 0, nullptr);
+    UnmapNativeLayer();
+  }
+}
+
+void RenderCompositorNativeSWGL::DoSwap() {
+  if (mNativeLayerForEntireWindow && mLayerTarget) {
+    wr_swgl_init_default_framebuffer(mContext, 0, 0, 0, 0, 0, nullptr);
+    UnmapNativeLayer();
+  }
+}
+
+bool RenderCompositorNativeSWGL::MapNativeLayer(
+    layers::NativeLayer* aLayer, const gfx::IntRect& aDirtyRect,
+    const gfx::IntRect& aValidRect) {
+  uint8_t* data = nullptr;
+  gfx::IntSize size;
+  int32_t stride = 0;
+  gfx::SurfaceFormat format = gfx::SurfaceFormat::UNKNOWN;
+  RefPtr<gfx::DrawTarget> dt = aLayer->NextSurfaceAsDrawTarget(
+      aValidRect, gfx::IntRegion(aDirtyRect), gfx::BackendType::SKIA);
+  if (!dt || !dt->LockBits(&data, &size, &stride, &format)) {
+    return false;
+  }
+  MOZ_ASSERT(format == gfx::SurfaceFormat::B8G8R8A8 ||
+             format == gfx::SurfaceFormat::B8G8R8X8);
+  mLayerTarget = std::move(dt);
+  mLayerData = data;
+  mLayerValidRectData = data + aValidRect.y * stride + aValidRect.x * 4;
+  mLayerStride = stride;
+  return true;
+}
+
+void RenderCompositorNativeSWGL::UnmapNativeLayer() {
+  MOZ_ASSERT(mLayerTarget && mLayerData);
+  mLayerTarget->ReleaseBits(mLayerData);
+  mLayerTarget = nullptr;
+  mLayerData = nullptr;
+  mLayerValidRectData = nullptr;
+  mLayerStride = 0;
+}
+
+bool RenderCompositorNativeSWGL::MapTile(wr::NativeTileId aId,
+                                         wr::DeviceIntRect aDirtyRect,
+                                         wr::DeviceIntRect aValidRect,
+                                         void** aData, int32_t* aStride) {
+  if (mNativeLayerForEntireWindow) {
+    return false;
+  }
+  gfx::IntRect dirtyRect(aDirtyRect.min.x, aDirtyRect.min.y, aDirtyRect.width(),
+                         aDirtyRect.height());
+  gfx::IntRect validRect(aValidRect.min.x, aValidRect.min.y, aValidRect.width(),
+                         aValidRect.height());
+  BindNativeLayer(aId, dirtyRect);
+  if (!MapNativeLayer(mCurrentlyBoundNativeLayer, dirtyRect, validRect)) {
+    UnbindNativeLayer();
+    return false;
+  }
+  *aData = mLayerValidRectData;
+  *aStride = mLayerStride;
+  return true;
+}
+
+void RenderCompositorNativeSWGL::UnmapTile() {
+  if (!mNativeLayerForEntireWindow && mCurrentlyBoundNativeLayer) {
+    UnmapNativeLayer();
+    UnbindNativeLayer();
+  }
+}
+
+}  // namespace mozilla::wr