/* -*- 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 "TextureHostOGL.h"

#include "EGLUtils.h"
#include "GLContext.h"     // for GLContext, etc
#include "GLLibraryEGL.h"  // for GLLibraryEGL
#include "GLUploadHelpers.h"
#include "GLReadTexImageHelper.h"
#include "gfx2DGlue.h"             // for ContentForFormat, etc
#include "mozilla/gfx/2D.h"        // for DataSourceSurface
#include "mozilla/gfx/BaseSize.h"  // for BaseSize
#include "mozilla/gfx/Logging.h"   // for gfxCriticalError
#include "mozilla/layers/ISurfaceAllocator.h"
#include "mozilla/webrender/RenderEGLImageTextureHost.h"
#include "mozilla/webrender/WebRenderAPI.h"
#include "nsRegion.h"  // for nsIntRegion
#include "AndroidSurfaceTexture.h"
#include "GfxTexturesReporter.h"  // for GfxTexturesReporter
#include "GLBlitTextureImageHelper.h"
#include "GeckoProfiler.h"

#ifdef XP_MACOSX
#  include "mozilla/layers/MacIOSurfaceTextureHostOGL.h"
#endif

#ifdef MOZ_WIDGET_ANDROID
#  include "mozilla/webrender/RenderAndroidSurfaceTextureHostOGL.h"
#endif

using namespace mozilla::gl;
using namespace mozilla::gfx;

namespace mozilla {
namespace layers {

class Compositor;

void ApplySamplingFilterToBoundTexture(gl::GLContext* aGL,
                                       gfx::SamplingFilter aSamplingFilter,
                                       GLuint aTarget) {
  GLenum filter =
      (aSamplingFilter == gfx::SamplingFilter::POINT ? LOCAL_GL_NEAREST
                                                     : LOCAL_GL_LINEAR);

  aGL->fTexParameteri(aTarget, LOCAL_GL_TEXTURE_MIN_FILTER, filter);
  aGL->fTexParameteri(aTarget, LOCAL_GL_TEXTURE_MAG_FILTER, filter);
}

already_AddRefed<TextureHost> CreateTextureHostOGL(
    const SurfaceDescriptor& aDesc, ISurfaceAllocator* aDeallocator,
    LayersBackend aBackend, TextureFlags aFlags) {
  RefPtr<TextureHost> result;
  switch (aDesc.type()) {
#ifdef MOZ_WIDGET_ANDROID
    case SurfaceDescriptor::TSurfaceTextureDescriptor: {
      const SurfaceTextureDescriptor& desc =
          aDesc.get_SurfaceTextureDescriptor();
      java::GeckoSurfaceTexture::LocalRef surfaceTexture =
          java::GeckoSurfaceTexture::Lookup(desc.handle());

      result = new SurfaceTextureHost(aFlags, surfaceTexture, desc.size(),
                                      desc.format(), desc.continuous(),
                                      desc.ignoreTransform());
      break;
    }
#endif

    case SurfaceDescriptor::TEGLImageDescriptor: {
      const EGLImageDescriptor& desc = aDesc.get_EGLImageDescriptor();
      result = new EGLImageTextureHost(aFlags, (EGLImage)desc.image(),
                                       (EGLSync)desc.fence(), desc.size(),
                                       desc.hasAlpha());
      break;
    }

#ifdef XP_MACOSX
    case SurfaceDescriptor::TSurfaceDescriptorMacIOSurface: {
      const SurfaceDescriptorMacIOSurface& desc =
          aDesc.get_SurfaceDescriptorMacIOSurface();
      result = new MacIOSurfaceTextureHostOGL(aFlags, desc);
      break;
    }
#endif

    case SurfaceDescriptor::TSurfaceDescriptorSharedGLTexture: {
      const auto& desc = aDesc.get_SurfaceDescriptorSharedGLTexture();
      result =
          new GLTextureHost(aFlags, desc.texture(), desc.target(),
                            (GLsync)desc.fence(), desc.size(), desc.hasAlpha());
      break;
    }
    default: {
      MOZ_ASSERT_UNREACHABLE("Unsupported SurfaceDescriptor type");
      break;
    }
  }
  return result.forget();
}

static gl::TextureImage::Flags FlagsToGLFlags(TextureFlags aFlags) {
  uint32_t result = TextureImage::NoFlags;

  if (aFlags & TextureFlags::USE_NEAREST_FILTER)
    result |= TextureImage::UseNearestFilter;
  if (aFlags & TextureFlags::ORIGIN_BOTTOM_LEFT)
    result |= TextureImage::OriginBottomLeft;
  if (aFlags & TextureFlags::DISALLOW_BIGIMAGE)
    result |= TextureImage::DisallowBigImage;

  return static_cast<gl::TextureImage::Flags>(result);
}

TextureImageTextureSourceOGL::TextureImageTextureSourceOGL(
    CompositorOGL* aCompositor, TextureFlags aFlags)
    : mGL(aCompositor->gl()),
      mCompositor(aCompositor),
      mFlags(aFlags),
      mIterating(false) {
  if (mCompositor) {
    mCompositor->RegisterTextureSource(this);
  }
}

TextureImageTextureSourceOGL::~TextureImageTextureSourceOGL() {
  DeallocateDeviceData();
}

void TextureImageTextureSourceOGL::DeallocateDeviceData() {
  mTexImage = nullptr;
  mGL = nullptr;
  if (mCompositor) {
    mCompositor->UnregisterTextureSource(this);
  }
  SetUpdateSerial(0);
}

bool TextureImageTextureSourceOGL::Update(gfx::DataSourceSurface* aSurface,
                                          nsIntRegion* aDestRegion,
                                          gfx::IntPoint* aSrcOffset) {
  GLContext* gl = mGL;
  MOZ_ASSERT(gl);
  if (!gl || !gl->MakeCurrent()) {
    NS_WARNING(
        "trying to update TextureImageTextureSourceOGL without a GLContext");
    return false;
  }
  if (!aSurface) {
    gfxCriticalError() << "Invalid surface for OGL update";
    return false;
  }
  MOZ_ASSERT(aSurface);

  IntSize size = aSurface->GetSize();
  if (!mTexImage || (mTexImage->GetSize() != size && !aSrcOffset) ||
      mTexImage->GetContentType() !=
          gfx::ContentForFormat(aSurface->GetFormat())) {
    if (mFlags & TextureFlags::DISALLOW_BIGIMAGE) {
      GLint maxTextureSize;
      gl->fGetIntegerv(LOCAL_GL_MAX_TEXTURE_SIZE, &maxTextureSize);
      if (size.width > maxTextureSize || size.height > maxTextureSize) {
        NS_WARNING("Texture exceeds maximum texture size, refusing upload");
        return false;
      }
      // Explicitly use CreateBasicTextureImage instead of CreateTextureImage,
      // because CreateTextureImage might still choose to create a tiled
      // texture image.
      mTexImage = CreateBasicTextureImage(
          gl, size, gfx::ContentForFormat(aSurface->GetFormat()),
          LOCAL_GL_CLAMP_TO_EDGE, FlagsToGLFlags(mFlags));
    } else {
      // XXX - clarify which size we want to use. IncrementalContentHost will
      // require the size of the destination surface to be different from
      // the size of aSurface.
      // See bug 893300 (tracks the implementation of ContentHost for new
      // textures).
      mTexImage = CreateTextureImage(
          gl, size, gfx::ContentForFormat(aSurface->GetFormat()),
          LOCAL_GL_CLAMP_TO_EDGE, FlagsToGLFlags(mFlags),
          SurfaceFormatToImageFormat(aSurface->GetFormat()));
    }
    ClearCachedFilter();

    if (aDestRegion && !aSrcOffset &&
        !aDestRegion->IsEqual(gfx::IntRect(0, 0, size.width, size.height))) {
      // UpdateFromDataSource will ignore our specified aDestRegion since the
      // texture hasn't been allocated with glTexImage2D yet. Call Resize() to
      // force the allocation (full size, but no upload), and then we'll only
      // upload the pixels we care about below.
      mTexImage->Resize(size);
    }
  }

  return mTexImage->UpdateFromDataSource(aSurface, aDestRegion, aSrcOffset);
}

void TextureImageTextureSourceOGL::EnsureBuffer(const IntSize& aSize,
                                                gfxContentType aContentType) {
  if (!mTexImage || mTexImage->GetSize() != aSize ||
      mTexImage->GetContentType() != aContentType) {
    mTexImage =
        CreateTextureImage(mGL, aSize, aContentType, LOCAL_GL_CLAMP_TO_EDGE,
                           FlagsToGLFlags(mFlags));
  }
  mTexImage->Resize(aSize);
}

void TextureImageTextureSourceOGL::SetTextureSourceProvider(
    TextureSourceProvider* aProvider) {
  GLContext* newGL = aProvider ? aProvider->GetGLContext() : nullptr;
  if (!newGL || mGL != newGL) {
    DeallocateDeviceData();
  }
  mGL = newGL;

  CompositorOGL* compositor =
      aProvider ? aProvider->AsCompositorOGL() : nullptr;
  if (mCompositor != compositor) {
    if (mCompositor) {
      mCompositor->UnregisterTextureSource(this);
    }
    if (compositor) {
      compositor->RegisterTextureSource(this);
    }
    mCompositor = compositor;
  }
}

gfx::IntSize TextureImageTextureSourceOGL::GetSize() const {
  if (mTexImage) {
    if (mIterating) {
      return mTexImage->GetTileRect().Size();
    }
    return mTexImage->GetSize();
  }
  NS_WARNING("Trying to query the size of an empty TextureSource.");
  return gfx::IntSize(0, 0);
}

gfx::SurfaceFormat TextureImageTextureSourceOGL::GetFormat() const {
  if (mTexImage) {
    return mTexImage->GetTextureFormat();
  }
  NS_WARNING("Trying to query the format of an empty TextureSource.");
  return gfx::SurfaceFormat::UNKNOWN;
}

gfx::IntRect TextureImageTextureSourceOGL::GetTileRect() {
  return mTexImage->GetTileRect();
}

void TextureImageTextureSourceOGL::BindTexture(
    GLenum aTextureUnit, gfx::SamplingFilter aSamplingFilter) {
  MOZ_ASSERT(mTexImage,
             "Trying to bind a TextureSource that does not have an underlying "
             "GL texture.");
  mTexImage->BindTexture(aTextureUnit);
  SetSamplingFilter(mGL, aSamplingFilter);
}

////////////////////////////////////////////////////////////////////////
// GLTextureSource

GLTextureSource::GLTextureSource(TextureSourceProvider* aProvider,
                                 GLuint aTextureHandle, GLenum aTarget,
                                 gfx::IntSize aSize, gfx::SurfaceFormat aFormat)
    : mGL(aProvider->GetGLContext()),
      mTextureHandle(aTextureHandle),
      mTextureTarget(aTarget),
      mSize(aSize),
      mFormat(aFormat) {
  MOZ_COUNT_CTOR(GLTextureSource);
}

GLTextureSource::~GLTextureSource() {
  MOZ_COUNT_DTOR(GLTextureSource);
  DeleteTextureHandle();
}

void GLTextureSource::DeallocateDeviceData() { DeleteTextureHandle(); }

void GLTextureSource::DeleteTextureHandle() {
  GLContext* gl = this->gl();
  if (mTextureHandle != 0 && gl && gl->MakeCurrent()) {
    gl->fDeleteTextures(1, &mTextureHandle);
  }
  mTextureHandle = 0;
}

void GLTextureSource::BindTexture(GLenum aTextureUnit,
                                  gfx::SamplingFilter aSamplingFilter) {
  MOZ_ASSERT(mTextureHandle != 0);
  GLContext* gl = this->gl();
  if (!gl || !gl->MakeCurrent()) {
    return;
  }
  gl->fActiveTexture(aTextureUnit);
  gl->fBindTexture(mTextureTarget, mTextureHandle);
  ApplySamplingFilterToBoundTexture(gl, aSamplingFilter, mTextureTarget);
}

void GLTextureSource::SetTextureSourceProvider(
    TextureSourceProvider* aProvider) {
  GLContext* newGL = aProvider ? aProvider->GetGLContext() : nullptr;
  if (!newGL) {
    mGL = newGL;
  } else if (mGL != newGL) {
    gfxCriticalError()
        << "GLTextureSource does not support changing compositors";
  }

  if (mNextSibling) {
    mNextSibling->SetTextureSourceProvider(aProvider);
  }
}

bool GLTextureSource::IsValid() const { return !!gl() && mTextureHandle != 0; }

////////////////////////////////////////////////////////////////////////
// DirectMapTextureSource

DirectMapTextureSource::DirectMapTextureSource(TextureSourceProvider* aProvider,
                                               gfx::DataSourceSurface* aSurface)
    : GLTextureSource(aProvider, 0, LOCAL_GL_TEXTURE_RECTANGLE_ARB,
                      aSurface->GetSize(), aSurface->GetFormat()),
      mSync(0) {
  MOZ_ASSERT(aSurface);

  UpdateInternal(aSurface, nullptr, nullptr, true);
}

DirectMapTextureSource::~DirectMapTextureSource() {
  if (!mSync || !gl() || !gl()->MakeCurrent() || gl()->IsDestroyed()) {
    return;
  }

  gl()->fDeleteSync(mSync);
  mSync = 0;
}

bool DirectMapTextureSource::Update(gfx::DataSourceSurface* aSurface,
                                    nsIntRegion* aDestRegion,
                                    gfx::IntPoint* aSrcOffset) {
  if (!aSurface) {
    return false;
  }

  return UpdateInternal(aSurface, aDestRegion, aSrcOffset, false);
}

void DirectMapTextureSource::MaybeFenceTexture() {
  if (!gl() || !gl()->MakeCurrent() || gl()->IsDestroyed()) {
    return;
  }

  if (mSync) {
    gl()->fDeleteSync(mSync);
  }
  mSync = gl()->fFenceSync(LOCAL_GL_SYNC_GPU_COMMANDS_COMPLETE, 0);
}

bool DirectMapTextureSource::Sync(bool aBlocking) {
  if (!gl() || !gl()->MakeCurrent() || gl()->IsDestroyed()) {
    // We use this function to decide whether we can unlock the texture
    // and clean it up. If we return false here and for whatever reason
    // the context is absent or invalid, the compositor will keep a
    // reference to this texture forever.
    return true;
  }

  if (!mSync) {
    return false;
  }

  GLenum waitResult =
      gl()->fClientWaitSync(mSync, LOCAL_GL_SYNC_FLUSH_COMMANDS_BIT,
                            aBlocking ? LOCAL_GL_TIMEOUT_IGNORED : 0);
  return waitResult == LOCAL_GL_ALREADY_SIGNALED ||
         waitResult == LOCAL_GL_CONDITION_SATISFIED;
}

bool DirectMapTextureSource::UpdateInternal(gfx::DataSourceSurface* aSurface,
                                            nsIntRegion* aDestRegion,
                                            gfx::IntPoint* aSrcOffset,
                                            bool aInit) {
  if (!gl() || !gl()->MakeCurrent()) {
    return false;
  }

  if (aInit) {
    gl()->fGenTextures(1, &mTextureHandle);
    gl()->fBindTexture(LOCAL_GL_TEXTURE_RECTANGLE_ARB, mTextureHandle);

    gl()->fTexParameteri(LOCAL_GL_TEXTURE_RECTANGLE_ARB,
                         LOCAL_GL_TEXTURE_STORAGE_HINT_APPLE,
                         LOCAL_GL_STORAGE_CACHED_APPLE);
    gl()->fTextureRangeAPPLE(LOCAL_GL_TEXTURE_RECTANGLE_ARB,
                             aSurface->Stride() * aSurface->GetSize().height,
                             aSurface->GetData());

    gl()->fTexParameteri(LOCAL_GL_TEXTURE_RECTANGLE_ARB,
                         LOCAL_GL_TEXTURE_WRAP_S, LOCAL_GL_CLAMP_TO_EDGE);
    gl()->fTexParameteri(LOCAL_GL_TEXTURE_RECTANGLE_ARB,
                         LOCAL_GL_TEXTURE_WRAP_T, LOCAL_GL_CLAMP_TO_EDGE);
  }

  MOZ_ASSERT(mTextureHandle);

  // APPLE_client_storage
  gl()->fPixelStorei(LOCAL_GL_UNPACK_CLIENT_STORAGE_APPLE, LOCAL_GL_TRUE);

  nsIntRegion destRegion = aDestRegion
                               ? *aDestRegion
                               : IntRect(0, 0, aSurface->GetSize().width,
                                         aSurface->GetSize().height);
  gfx::IntPoint srcPoint = aSrcOffset ? *aSrcOffset : gfx::IntPoint(0, 0);
  mFormat = gl::UploadSurfaceToTexture(
      gl(), aSurface, destRegion, mTextureHandle, aSurface->GetSize(), nullptr,
      aInit, srcPoint, LOCAL_GL_TEXTURE0, LOCAL_GL_TEXTURE_RECTANGLE_ARB);

  if (mSync) {
    gl()->fDeleteSync(mSync);
    mSync = 0;
  }

  gl()->fPixelStorei(LOCAL_GL_UNPACK_CLIENT_STORAGE_APPLE, LOCAL_GL_FALSE);
  return true;
}

////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////
// SurfaceTextureHost

#ifdef MOZ_WIDGET_ANDROID

SurfaceTextureSource::SurfaceTextureSource(
    TextureSourceProvider* aProvider,
    mozilla::java::GeckoSurfaceTexture::Ref& aSurfTex,
    gfx::SurfaceFormat aFormat, GLenum aTarget, GLenum aWrapMode,
    gfx::IntSize aSize, bool aIgnoreTransform)
    : mGL(aProvider->GetGLContext()),
      mSurfTex(aSurfTex),
      mFormat(aFormat),
      mTextureTarget(aTarget),
      mWrapMode(aWrapMode),
      mSize(aSize),
      mIgnoreTransform(aIgnoreTransform) {}

void SurfaceTextureSource::BindTexture(GLenum aTextureUnit,
                                       gfx::SamplingFilter aSamplingFilter) {
  MOZ_ASSERT(mSurfTex);
  GLContext* gl = this->gl();
  if (!gl || !gl->MakeCurrent()) {
    NS_WARNING("Trying to bind a texture without a GLContext");
    return;
  }

  gl->fActiveTexture(aTextureUnit);
  gl->fBindTexture(mTextureTarget, mSurfTex->GetTexName());

  ApplySamplingFilterToBoundTexture(gl, aSamplingFilter, mTextureTarget);
}

void SurfaceTextureSource::SetTextureSourceProvider(
    TextureSourceProvider* aProvider) {
  GLContext* newGL = aProvider->GetGLContext();
  if (!newGL || mGL != newGL) {
    DeallocateDeviceData();
    return;
  }

  mGL = newGL;
}

bool SurfaceTextureSource::IsValid() const { return !!gl(); }

gfx::Matrix4x4 SurfaceTextureSource::GetTextureTransform() {
  MOZ_ASSERT(mSurfTex);

  gfx::Matrix4x4 ret;

  // GetTransformMatrix() returns the transform set by the producer side of
  // the SurfaceTexture. We should ignore this if we know the transform should
  // be identity but the producer couldn't set it correctly, like is the
  // case for AndroidNativeWindowTextureData.
  if (!mIgnoreTransform) {
    const auto& surf = java::sdk::SurfaceTexture::LocalRef(
        java::sdk::SurfaceTexture::Ref::From(mSurfTex));
    AndroidSurfaceTexture::GetTransformMatrix(surf, &ret);
  }

  return ret;
}

void SurfaceTextureSource::DeallocateDeviceData() { mSurfTex = nullptr; }

////////////////////////////////////////////////////////////////////////

SurfaceTextureHost::SurfaceTextureHost(
    TextureFlags aFlags, mozilla::java::GeckoSurfaceTexture::Ref& aSurfTex,
    gfx::IntSize aSize, gfx::SurfaceFormat aFormat, bool aContinuousUpdate,
    bool aIgnoreTransform)
    : TextureHost(aFlags),
      mSurfTex(aSurfTex),
      mSize(aSize),
      mFormat(aFormat),
      mContinuousUpdate(aContinuousUpdate),
      mIgnoreTransform(aIgnoreTransform) {
  if (!mSurfTex) {
    return;
  }

  // Continuous update makes no sense with single buffer mode
  MOZ_ASSERT(!mSurfTex->IsSingleBuffer() || !mContinuousUpdate);

  mSurfTex->IncrementUse();
}

SurfaceTextureHost::~SurfaceTextureHost() {
  if (mSurfTex) {
    mSurfTex->DecrementUse();
    mSurfTex = nullptr;
  }
}

void SurfaceTextureHost::PrepareTextureSource(
    CompositableTextureSourceRef& aTexture) {
  if (!mContinuousUpdate && mSurfTex) {
    if (!EnsureAttached()) {
      return;
    }

    // UpdateTexImage() advances the internal buffer queue, so we only want to
    // call this once per transactionwhen we are not in continuous mode (as we
    // are here). Otherwise, the SurfaceTexture content will be de-synced from
    // the rest of the page in subsequent compositor passes.
    mSurfTex->UpdateTexImage();
  }
}

gl::GLContext* SurfaceTextureHost::gl() const {
  return mProvider ? mProvider->GetGLContext() : nullptr;
}

bool SurfaceTextureHost::EnsureAttached() {
  GLContext* gl = this->gl();
  if (!gl || !gl->MakeCurrent()) {
    return false;
  }

  if (!mSurfTex) {
    return false;
  }

  if (!mSurfTex->IsAttachedToGLContext((int64_t)gl)) {
    GLuint texName;
    gl->fGenTextures(1, &texName);
    if (NS_FAILED(mSurfTex->AttachToGLContext((int64_t)gl, texName))) {
      return false;
    }
  }

  return true;
}

bool SurfaceTextureHost::Lock() {
  if (!EnsureAttached()) {
    return false;
  }

  if (mContinuousUpdate) {
    mSurfTex->UpdateTexImage();
  }

  if (!mTextureSource) {
    GLenum target =
        LOCAL_GL_TEXTURE_EXTERNAL;  // This is required by SurfaceTexture
    GLenum wrapMode = LOCAL_GL_CLAMP_TO_EDGE;
    mTextureSource =
        new SurfaceTextureSource(mProvider, mSurfTex, mFormat, target, wrapMode,
                                 mSize, mIgnoreTransform);
  }

  return true;
}

void SurfaceTextureHost::SetTextureSourceProvider(
    TextureSourceProvider* aProvider) {
  if (mProvider != aProvider) {
    if (!aProvider || !aProvider->GetGLContext()) {
      DeallocateDeviceData();
      return;
    }
    mProvider = aProvider;
  }

  if (mTextureSource) {
    mTextureSource->SetTextureSourceProvider(aProvider);
  }
}

void SurfaceTextureHost::NotifyNotUsed() {
  if (mSurfTex && mSurfTex->IsSingleBuffer()) {
    mSurfTex->ReleaseTexImage();
  }

  TextureHost::NotifyNotUsed();
}

gfx::SurfaceFormat SurfaceTextureHost::GetFormat() const { return mFormat; }

void SurfaceTextureHost::DeallocateDeviceData() {
  if (mTextureSource) {
    mTextureSource->DeallocateDeviceData();
  }

  if (mSurfTex) {
    mSurfTex->DecrementUse();
    mSurfTex = nullptr;
  }
}

void SurfaceTextureHost::CreateRenderTexture(
    const wr::ExternalImageId& aExternalImageId) {
  RefPtr<wr::RenderTextureHost> texture =
      new wr::RenderAndroidSurfaceTextureHostOGL(mSurfTex, mSize, mFormat,
                                                 mContinuousUpdate);
  wr::RenderThread::Get()->RegisterExternalImage(wr::AsUint64(aExternalImageId),
                                                 texture.forget());
}

void SurfaceTextureHost::PushResourceUpdates(
    wr::TransactionBuilder& aResources, ResourceUpdateOp aOp,
    const Range<wr::ImageKey>& aImageKeys, const wr::ExternalImageId& aExtID) {
  auto method = aOp == TextureHost::ADD_IMAGE
                    ? &wr::TransactionBuilder::AddExternalImage
                    : &wr::TransactionBuilder::UpdateExternalImage;
  auto bufferType = wr::WrExternalImageBufferType::TextureExternalHandle;

  switch (GetFormat()) {
    case gfx::SurfaceFormat::R8G8B8X8:
    case gfx::SurfaceFormat::R8G8B8A8: {
      MOZ_ASSERT(aImageKeys.length() == 1);

      // XXX Add RGBA handling. Temporary hack to avoid crash
      // With BGRA format setting, rendering works without problem.
      auto format = GetFormat() == gfx::SurfaceFormat::R8G8B8A8
                        ? gfx::SurfaceFormat::B8G8R8A8
                        : gfx::SurfaceFormat::B8G8R8X8;
      wr::ImageDescriptor descriptor(GetSize(), format);
      (aResources.*method)(aImageKeys[0], descriptor, aExtID, bufferType, 0);
      break;
    }
    default: {
      MOZ_ASSERT_UNREACHABLE("unexpected to be called");
    }
  }
}

void SurfaceTextureHost::PushDisplayItems(
    wr::DisplayListBuilder& aBuilder, const wr::LayoutRect& aBounds,
    const wr::LayoutRect& aClip, wr::ImageRendering aFilter,
    const Range<wr::ImageKey>& aImageKeys) {
  switch (GetFormat()) {
    case gfx::SurfaceFormat::R8G8B8X8:
    case gfx::SurfaceFormat::R8G8B8A8:
    case gfx::SurfaceFormat::B8G8R8A8:
    case gfx::SurfaceFormat::B8G8R8X8: {
      MOZ_ASSERT(aImageKeys.length() == 1);
      aBuilder.PushImage(aBounds, aClip, true, aFilter, aImageKeys[0],
                         !(mFlags & TextureFlags::NON_PREMULTIPLIED));
      break;
    }
    default: {
      MOZ_ASSERT_UNREACHABLE("unexpected to be called");
    }
  }
}

#endif  // MOZ_WIDGET_ANDROID

////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////
// EGLImage

EGLImageTextureSource::EGLImageTextureSource(TextureSourceProvider* aProvider,
                                             EGLImage aImage,
                                             gfx::SurfaceFormat aFormat,
                                             GLenum aTarget, GLenum aWrapMode,
                                             gfx::IntSize aSize)
    : mImage(aImage),
      mFormat(aFormat),
      mTextureTarget(aTarget),
      mWrapMode(aWrapMode),
      mSize(aSize) {
  MOZ_ASSERT(mTextureTarget == LOCAL_GL_TEXTURE_2D ||
             mTextureTarget == LOCAL_GL_TEXTURE_EXTERNAL);
  SetTextureSourceProvider(aProvider);
}

void EGLImageTextureSource::BindTexture(GLenum aTextureUnit,
                                        gfx::SamplingFilter aSamplingFilter) {
  GLContext* gl = this->gl();
  if (!gl || !gl->MakeCurrent()) {
    NS_WARNING("Trying to bind a texture without a GLContext");
    return;
  }

  MOZ_ASSERT(DoesEGLContextSupportSharingWithEGLImage(gl),
             "EGLImage not supported or disabled in runtime");

  GLuint tex = mCompositor->GetTemporaryTexture(mTextureTarget, aTextureUnit);

  gl->fActiveTexture(aTextureUnit);
  gl->fBindTexture(mTextureTarget, tex);

  gl->fEGLImageTargetTexture2D(mTextureTarget, mImage);

  ApplySamplingFilterToBoundTexture(gl, aSamplingFilter, mTextureTarget);
}

void EGLImageTextureSource::SetTextureSourceProvider(
    TextureSourceProvider* aProvider) {
  if (mCompositor == aProvider) {
    return;
  }

  if (!aProvider) {
    mGL = nullptr;
    mCompositor = nullptr;
    return;
  }

  mGL = aProvider->GetGLContext();
  if (Compositor* compositor = aProvider->AsCompositor()) {
    mCompositor = compositor->AsCompositorOGL();
  }
}

bool EGLImageTextureSource::IsValid() const { return !!gl(); }

gfx::Matrix4x4 EGLImageTextureSource::GetTextureTransform() {
  gfx::Matrix4x4 ret;
  return ret;
}

////////////////////////////////////////////////////////////////////////

EGLImageTextureHost::EGLImageTextureHost(TextureFlags aFlags, EGLImage aImage,
                                         EGLSync aSync, gfx::IntSize aSize,
                                         bool hasAlpha)
    : TextureHost(aFlags),
      mImage(aImage),
      mSync(aSync),
      mSize(aSize),
      mHasAlpha(hasAlpha) {}

EGLImageTextureHost::~EGLImageTextureHost() {}

gl::GLContext* EGLImageTextureHost::gl() const {
  return mProvider ? mProvider->GetGLContext() : nullptr;
}

bool EGLImageTextureHost::Lock() {
  GLContext* gl = this->gl();
  if (!gl || !gl->MakeCurrent()) {
    return false;
  }

  auto* egl = gl::GLLibraryEGL::Get();
  EGLint status = LOCAL_EGL_CONDITION_SATISFIED;

  if (mSync) {
    MOZ_ASSERT(egl->IsExtensionSupported(GLLibraryEGL::KHR_fence_sync));
    status = egl->fClientWaitSync(EGL_DISPLAY(), mSync, 0, LOCAL_EGL_FOREVER);
  }

  if (status != LOCAL_EGL_CONDITION_SATISFIED) {
    MOZ_ASSERT(
        status != 0,
        "ClientWaitSync generated an error. Has mSync already been destroyed?");
    return false;
  }

  if (!mTextureSource) {
    gfx::SurfaceFormat format =
        mHasAlpha ? gfx::SurfaceFormat::R8G8B8A8 : gfx::SurfaceFormat::R8G8B8X8;
    GLenum target = gl->GetPreferredEGLImageTextureTarget();
    GLenum wrapMode = LOCAL_GL_CLAMP_TO_EDGE;
    mTextureSource = new EGLImageTextureSource(mProvider, mImage, format,
                                               target, wrapMode, mSize);
  }

  return true;
}

void EGLImageTextureHost::Unlock() {}

void EGLImageTextureHost::SetTextureSourceProvider(
    TextureSourceProvider* aProvider) {
  if (mProvider != aProvider) {
    if (!aProvider || !aProvider->GetGLContext()) {
      mProvider = nullptr;
      mTextureSource = nullptr;
      return;
    }
    mProvider = aProvider;
  }

  if (mTextureSource) {
    mTextureSource->SetTextureSourceProvider(aProvider);
  }
}

gfx::SurfaceFormat EGLImageTextureHost::GetFormat() const {
  MOZ_ASSERT(mTextureSource);
  return mTextureSource ? mTextureSource->GetFormat()
                        : gfx::SurfaceFormat::UNKNOWN;
}

void EGLImageTextureHost::CreateRenderTexture(
    const wr::ExternalImageId& aExternalImageId) {
  RefPtr<wr::RenderTextureHost> texture =
      new wr::RenderEGLImageTextureHost(mImage, mSync, mSize);
  wr::RenderThread::Get()->RegisterExternalImage(wr::AsUint64(aExternalImageId),
                                                 texture.forget());
}

void EGLImageTextureHost::PushResourceUpdates(
    wr::TransactionBuilder& aResources, ResourceUpdateOp aOp,
    const Range<wr::ImageKey>& aImageKeys, const wr::ExternalImageId& aExtID) {
  auto method = aOp == TextureHost::ADD_IMAGE
                    ? &wr::TransactionBuilder::AddExternalImage
                    : &wr::TransactionBuilder::UpdateExternalImage;
  auto bufferType = wr::WrExternalImageBufferType::TextureExternalHandle;

  gfx::SurfaceFormat format =
      mHasAlpha ? gfx::SurfaceFormat::R8G8B8A8 : gfx::SurfaceFormat::R8G8B8X8;

  MOZ_ASSERT(aImageKeys.length() == 1);
  // XXX Add RGBA handling. Temporary hack to avoid crash
  // With BGRA format setting, rendering works without problem.
  auto formatTmp = format == gfx::SurfaceFormat::R8G8B8A8
                       ? gfx::SurfaceFormat::B8G8R8A8
                       : gfx::SurfaceFormat::B8G8R8X8;
  wr::ImageDescriptor descriptor(GetSize(), formatTmp);
  (aResources.*method)(aImageKeys[0], descriptor, aExtID, bufferType, 0);
}

void EGLImageTextureHost::PushDisplayItems(
    wr::DisplayListBuilder& aBuilder, const wr::LayoutRect& aBounds,
    const wr::LayoutRect& aClip, wr::ImageRendering aFilter,
    const Range<wr::ImageKey>& aImageKeys) {
  MOZ_ASSERT(aImageKeys.length() == 1);
  aBuilder.PushImage(aBounds, aClip, true, aFilter, aImageKeys[0],
                     !(mFlags & TextureFlags::NON_PREMULTIPLIED));
}

//

GLTextureHost::GLTextureHost(TextureFlags aFlags, GLuint aTextureHandle,
                             GLenum aTarget, GLsync aSync, gfx::IntSize aSize,
                             bool aHasAlpha)
    : TextureHost(aFlags),
      mTexture(aTextureHandle),
      mTarget(aTarget),
      mSync(aSync),
      mSize(aSize),
      mHasAlpha(aHasAlpha) {}

GLTextureHost::~GLTextureHost() {}

gl::GLContext* GLTextureHost::gl() const {
  return mProvider ? mProvider->GetGLContext() : nullptr;
}

bool GLTextureHost::Lock() {
  GLContext* gl = this->gl();
  if (!gl || !gl->MakeCurrent()) {
    return false;
  }

  if (mSync) {
    if (!gl->MakeCurrent()) {
      return false;
    }
    gl->fWaitSync(mSync, 0, LOCAL_GL_TIMEOUT_IGNORED);
    gl->fDeleteSync(mSync);
    mSync = 0;
  }

  if (!mTextureSource) {
    gfx::SurfaceFormat format =
        mHasAlpha ? gfx::SurfaceFormat::R8G8B8A8 : gfx::SurfaceFormat::R8G8B8X8;
    mTextureSource =
        new GLTextureSource(mProvider, mTexture, mTarget, mSize, format);
  }

  return true;
}

void GLTextureHost::SetTextureSourceProvider(TextureSourceProvider* aProvider) {
  if (mProvider != aProvider) {
    if (!aProvider || !aProvider->GetGLContext()) {
      mProvider = nullptr;
      mTextureSource = nullptr;
      return;
    }
    mProvider = aProvider;
  }

  if (mTextureSource) {
    mTextureSource->SetTextureSourceProvider(aProvider);
  }
}

gfx::SurfaceFormat GLTextureHost::GetFormat() const {
  MOZ_ASSERT(mTextureSource);
  return mTextureSource ? mTextureSource->GetFormat()
                        : gfx::SurfaceFormat::UNKNOWN;
}

}  // namespace layers
}  // namespace mozilla