/* -*- 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 "mozilla/layers/TextureClientX11.h"

#include "mozilla/layers/CompositableClient.h"

#include "mozilla/layers/CompositableForwarder.h"

#include "mozilla/layers/ISurfaceAllocator.h"

#include "mozilla/layers/ShadowLayerUtilsX11.h"

#include "mozilla/gfx/2D.h"

#include "mozilla/gfx/Logging.h"

#include "gfxXlibSurface.h"

#include "gfx2DGlue.h"

#include "mozilla/X11Util.h"

#include <X11/Xlib.h>

using namespace mozilla;

using namespace mozilla::gfx;

namespace mozilla {

namespace layers {

X11TextureData::X11TextureData(gfx::IntSize aSize, gfx::SurfaceFormat aFormat,

                               bool aClientDeallocation, bool aIsCrossProcess,

                               gfxXlibSurface* aSurface)

: mSize(aSize)

, mFormat(aFormat)

, mSurface(aSurface)

, mClientDeallocation(aClientDeallocation)

, mIsCrossProcess(aIsCrossProcess)

{

  MOZ_ASSERT(mSurface);

}

bool

X11TextureData::Lock(OpenMode aMode)

{

  return true;

}

void

X11TextureData::Unlock()

{

  if (mSurface && mIsCrossProcess) {

    FinishX(DefaultXDisplay());

  }

}

void

X11TextureData::FillInfo(TextureData::Info& aInfo) const

{

  aInfo.size = mSize;

  aInfo.format = mFormat;

  aInfo.supportsMoz2D = true;

  aInfo.hasIntermediateBuffer = false;

  aInfo.hasSynchronization = false;

  aInfo.canExposeMappedData = false;

}

bool

X11TextureData::Serialize(SurfaceDescriptor& aOutDescriptor)

{

  MOZ_ASSERT(mSurface);

  if (!mSurface) {

    return false;

  }

  if (!mClientDeallocation) {

    // Pass to the host the responsibility of freeing the pixmap. ReleasePixmap means

    // the underlying pixmap will not be deallocated in mSurface's destructor.

    // ToSurfaceDescriptor is at most called once per TextureClient.

    mSurface->ReleasePixmap();

  }

  aOutDescriptor = SurfaceDescriptorX11(mSurface);

  return true;

}

already_AddRefed<gfx::DrawTarget>

X11TextureData::BorrowDrawTarget()

{

  MOZ_ASSERT(mSurface);

  if (!mSurface) {

    return nullptr;

  }

  IntSize size = mSurface->GetSize();

  RefPtr<gfx::DrawTarget> dt = Factory::CreateDrawTargetForCairoSurface(mSurface->CairoSurface(), size);

  return dt.forget();

}

bool

X11TextureData::UpdateFromSurface(gfx::SourceSurface* aSurface)

{

  RefPtr<DrawTarget> dt = BorrowDrawTarget();

  if (!dt) {

    return false;

  }

  dt->CopySurface(aSurface, IntRect(IntPoint(), aSurface->GetSize()), IntPoint());

  return true;

}

void

X11TextureData::Deallocate(LayersIPCChannel*)

{

  mSurface = nullptr;

}

TextureData*

X11TextureData::CreateSimilar(LayersIPCChannel* aAllocator,

                              LayersBackend aLayersBackend,

                              TextureFlags aFlags,

                              TextureAllocationFlags aAllocFlags) const

{

  return X11TextureData::Create(mSize, mFormat, aFlags, aAllocator);

}

X11TextureData*

X11TextureData::Create(gfx::IntSize aSize, gfx::SurfaceFormat aFormat,

                       TextureFlags aFlags, LayersIPCChannel* aAllocator)

{

  MOZ_ASSERT(aSize.width >= 0 && aSize.height >= 0);

  if (aSize.width <= 0 || aSize.height <= 0 ||

      aSize.width > XLIB_IMAGE_SIDE_SIZE_LIMIT ||

      aSize.height > XLIB_IMAGE_SIDE_SIZE_LIMIT) {

    gfxDebug() << "Asking for X11 surface of invalid size " << aSize.width << "x" << aSize.height;

    return nullptr;

  }

  gfxImageFormat imageFormat = SurfaceFormatToImageFormat(aFormat);

  RefPtr<gfxASurface> surface = gfxPlatform::GetPlatform()->CreateOffscreenSurface(aSize, imageFormat);

  if (!surface || surface->GetType() != gfxSurfaceType::Xlib) {

    NS_ERROR("creating Xlib surface failed!");

    return nullptr;

  }

  gfxXlibSurface* xlibSurface = static_cast<gfxXlibSurface*>(surface.get());

  bool crossProcess = !aAllocator->IsSameProcess();

  X11TextureData* texture = new X11TextureData(aSize, aFormat,

                                               !!(aFlags & TextureFlags::DEALLOCATE_CLIENT),

                                               crossProcess,

                                               xlibSurface);

  if (crossProcess) {

    FinishX(DefaultXDisplay());

  }

  return texture;

}

} // namespace

} // namespace