/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 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 "WindowSurfaceXRender.h"

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

#include "mozilla/gfx/Types.h"

#include "gfxPlatform.h"

namespace mozilla {

namespace widget {

WindowSurfaceXRender::WindowSurfaceXRender(Display* aDisplay,

                                           Window aWindow,

                                           Visual* aVisual,

                                           unsigned int aDepth)

  : WindowSurfaceX11(aDisplay, aWindow, aVisual, aDepth)

  , mXlibSurface(nullptr)

  , mGC(X11None)

{

}

WindowSurfaceXRender::~WindowSurfaceXRender()

{

  if (mGC != X11None) {

    XFreeGC(mDisplay, mGC);

  }

}

already_AddRefed<gfx::DrawTarget>

WindowSurfaceXRender::Lock(const LayoutDeviceIntRegion& aRegion)

{

  gfx::IntRect bounds = aRegion.GetBounds().ToUnknownRect();

  gfx::IntSize size(bounds.XMost(), bounds.YMost());

  if (!mXlibSurface || mXlibSurface->CairoStatus() ||

      !(size <= mXlibSurface->GetSize())) {

    mXlibSurface = gfxXlibSurface::Create(DefaultScreenOfDisplay(mDisplay),

                                          mVisual,

                                          size,

                                          mWindow);

  }

  if (!mXlibSurface || mXlibSurface->CairoStatus()) {

    return nullptr;

  }

  return gfxPlatform::GetPlatform()->CreateDrawTargetForSurface(mXlibSurface, size);

}

void

WindowSurfaceXRender::Commit(const LayoutDeviceIntRegion& aInvalidRegion)

{

  AutoTArray<XRectangle, 32> xrects;

  xrects.SetCapacity(aInvalidRegion.GetNumRects());

  for (auto iter = aInvalidRegion.RectIter(); !iter.Done(); iter.Next()) {

    const LayoutDeviceIntRect &r = iter.Get();

    XRectangle xrect = { (short)r.x, (short)r.y, (unsigned short)r.width, (unsigned short)r.height };

    xrects.AppendElement(xrect);

  }

  if (!mGC) {

    mGC = XCreateGC(mDisplay, mWindow, 0, nullptr);

    if (!mGC) {

      NS_WARNING("Couldn't create X11 graphics context for window!");

      return;

    }

  }

  XSetClipRectangles(mDisplay, mGC, 0, 0, xrects.Elements(), xrects.Length(), YXBanded);

  MOZ_ASSERT(mXlibSurface && mXlibSurface->CairoStatus() == 0,

             "Attempted to commit invalid surface!");

  gfx::IntRect bounds = aInvalidRegion.GetBounds().ToUnknownRect();

  gfx::IntSize size(bounds.XMost(), bounds.YMost());

  XCopyArea(mDisplay, mXlibSurface->XDrawable(), mWindow, mGC, bounds.x, bounds.y,

            size.width, size.height, bounds.x, bounds.y);

}

}  // namespace widget

}  // namespace mozilla