/* -*- 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/gfx/Point.h"          // for IntSize, Point

#include "mozilla/gfx/Rect.h"           // for Rect

#include "mozilla/gfx/Types.h"          // for Color, SurfaceFormat

#include "mozilla/layers/Compositor.h"  // for Compositor

#include "mozilla/layers/CompositorTypes.h"

#include "mozilla/layers/Effects.h"     // for Effect, EffectChain, etc

#include "mozilla/TimeStamp.h"          // for TimeStamp, TimeDuration

#include "mozilla/Sprintf.h"

#include "mozilla/gfx/HelpersSkia.h"

#include "PaintCounter.h"

namespace mozilla {

namespace layers {

using namespace mozilla::gfx;

// Positioned below the chrome UI

IntRect PaintCounter::mRect = IntRect(0, 175, 300, 60);

PaintCounter::PaintCounter()

{

  mFormat = SurfaceFormat::B8G8R8A8;

  mSurface = Factory::CreateDataSourceSurface(mRect.Size(), mFormat);

  mMap.emplace(mSurface, DataSourceSurface::READ_WRITE);

  mStride = mMap->GetStride();

  mCanvas =

    SkCanvas::MakeRasterDirect(MakeSkiaImageInfo(mRect.Size(), mFormat),

                              mMap->GetData(), mStride);

  mCanvas->clear(SK_ColorWHITE);

}

PaintCounter::~PaintCounter()

{

  mSurface = nullptr;

  mTextureSource = nullptr;

  mTexturedEffect = nullptr;

}

void

PaintCounter::Draw(Compositor* aCompositor, TimeDuration aPaintTime, TimeDuration aCompositeTime) {

  char buffer[48];

  SprintfLiteral(buffer, "P: %.2f  C: %.2f",

                 aPaintTime.ToMilliseconds(),

                 aCompositeTime.ToMilliseconds());

  SkPaint paint;

  paint.setTextSize(32);

  paint.setColor(SkColorSetRGB(0, 255, 0));

  paint.setAntiAlias(true);

  mCanvas->clear(SK_ColorTRANSPARENT);

  mCanvas->drawText(buffer, strlen(buffer), 10, 30, paint);

  mCanvas->flush();

  if (!mTextureSource) {

    mTextureSource = aCompositor->CreateDataTextureSource();

    mTexturedEffect = CreateTexturedEffect(mFormat, mTextureSource,

                                           SamplingFilter::POINT, true);

    mTexturedEffect->mTextureCoords = Rect(0, 0, 1.0f, 1.0f);

  }

  mTextureSource->Update(mSurface);

  EffectChain effectChain;

  effectChain.mPrimaryEffect = mTexturedEffect;

  gfx::Matrix4x4 identity;

  Rect rect(mRect.X(), mRect.Y(), mRect.Width(), mRect.Height());

  aCompositor->DrawQuad(rect, mRect, effectChain, 1.0, identity);

}

} // end namespace layers

} // end namespace mozilla