image/ImageRegion.h
author Andrew Halberstadt <ahalberstadt@mozilla.com>
Thu, 19 Apr 2018 16:12:26 -0400
changeset 416926 9a2ba1c7b0ec32f81e067acd2610e47b9be7d764
parent 367488 5115e2dea29a22fbaac7ad9db8723de762ec4ddd
child 448947 6f3709b3878117466168c40affa7bca0b60cf75b
permissions -rw-r--r--
Bug 1451159 - [testing/profiles] Store profile data in actual profile look alike folders r=gbrown This moves testing/profiles/prefs_general.js to testing/profiles/common/user.js. It also adds an 'extensions' folder to the common profile. Dropping extension files here will get them installed in all test harnesses (useful for testing on try). The idea is that all test harnesses will eventually use this 'common' profile. We'll also create some new per harness profiles, e.g testing/profiles/mochitest and testing/profiles/reftest. This way there will be a single location developers can go to set preferences, both for a specific harness, and across all harnesses. MozReview-Commit-ID: 8sqBqLiypgU

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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/. */

#ifndef mozilla_image_ImageRegion_h
#define mozilla_image_ImageRegion_h

#include "gfxRect.h"
#include "mozilla/gfx/Types.h"

namespace mozilla {
namespace image {

/**
 * An axis-aligned rectangle in tiled image space, with an optional sampling
 * restriction rect. The drawing code ensures that if a sampling restriction
 * rect is present, any pixels sampled during the drawing process are found
 * within that rect.
 *
 * The sampling restriction rect exists primarily for callers which perform
 * pixel snapping. Other callers should generally use one of the Create()
 * overloads.
 */
class ImageRegion
{
  typedef mozilla::gfx::ExtendMode ExtendMode;

public:
  static ImageRegion Empty()
  {
    return ImageRegion(gfxRect(), ExtendMode::CLAMP);
  }

  static ImageRegion Create(const gfxRect& aRect,
                            ExtendMode aExtendMode = ExtendMode::CLAMP)
  {
    return ImageRegion(aRect, aExtendMode);
  }

  static ImageRegion Create(const gfxSize& aSize,
                            ExtendMode aExtendMode = ExtendMode::CLAMP)
  {
    return ImageRegion(gfxRect(0, 0, aSize.width, aSize.height), aExtendMode);
  }

  static ImageRegion Create(const nsIntSize& aSize,
                            ExtendMode aExtendMode = ExtendMode::CLAMP)
  {
    return ImageRegion(gfxRect(0, 0, aSize.width, aSize.height), aExtendMode);
  }

  static ImageRegion CreateWithSamplingRestriction(const gfxRect& aRect,
                                                   const gfxRect& aRestriction,
                                                   ExtendMode aExtendMode = ExtendMode::CLAMP)
  {
    return ImageRegion(aRect, aRestriction, aExtendMode);
  }

  bool IsRestricted() const { return mIsRestricted; }
  const gfxRect& Rect() const { return mRect; }

  const gfxRect& Restriction() const
  {
    MOZ_ASSERT(mIsRestricted);
    return mRestriction;
  }

  bool RestrictionContains(const gfxRect& aRect) const
  {
    if (!mIsRestricted) {
      return true;
    }
    return mRestriction.Contains(aRect);
  }

  ImageRegion Intersect(const gfxRect& aRect) const
  {
    if (mIsRestricted) {
      return CreateWithSamplingRestriction(aRect.Intersect(mRect),
                                           aRect.Intersect(mRestriction));
    }
    return Create(aRect.Intersect(mRect));
  }

  gfxRect IntersectAndRestrict(const gfxRect& aRect) const
  {
    gfxRect intersection = mRect.Intersect(aRect);
    if (mIsRestricted) {
      intersection = mRestriction.Intersect(intersection);
    }
    return intersection;
  }

  void MoveBy(gfxFloat dx, gfxFloat dy)
  {
    mRect.MoveBy(dx, dy);
    if (mIsRestricted) {
      mRestriction.MoveBy(dx, dy);
    }
  }

  void Scale(gfxFloat sx, gfxFloat sy)
  {
    mRect.Scale(sx, sy);
    if (mIsRestricted) {
      mRestriction.Scale(sx, sy);
    }
  }

  void TransformBy(const gfxMatrix& aMatrix)
  {
    mRect = aMatrix.TransformRect(mRect);
    if (mIsRestricted) {
      mRestriction = aMatrix.TransformRect(mRestriction);
    }
  }

  void TransformBoundsBy(const gfxMatrix& aMatrix)
  {
    mRect = aMatrix.TransformBounds(mRect);
    if (mIsRestricted) {
      mRestriction = aMatrix.TransformBounds(mRestriction);
    }
  }

  ImageRegion operator-(const gfxPoint& aPt) const
  {
    if (mIsRestricted) {
      return CreateWithSamplingRestriction(mRect - aPt, mRestriction - aPt);
    }
    return Create(mRect - aPt);
  }

  ImageRegion operator+(const gfxPoint& aPt) const
  {
    if (mIsRestricted) {
      return CreateWithSamplingRestriction(mRect + aPt, mRestriction + aPt);
    }
    return Create(mRect + aPt);
  }

  gfx::ExtendMode GetExtendMode() const
  {
    return mExtendMode;
  }

  /* ImageRegion() : mIsRestricted(false) { } */

private:
  explicit ImageRegion(const gfxRect& aRect, ExtendMode aExtendMode)
    : mRect(aRect)
    , mExtendMode(aExtendMode)
    , mIsRestricted(false)
  { }

  ImageRegion(const gfxRect& aRect, const gfxRect& aRestriction, ExtendMode aExtendMode)
    : mRect(aRect)
    , mRestriction(aRestriction)
    , mExtendMode(aExtendMode)
    , mIsRestricted(true)
  { }

  gfxRect mRect;
  gfxRect mRestriction;
  ExtendMode mExtendMode;
  bool    mIsRestricted;
};

} // namespace image
} // namespace mozilla

#endif // mozilla_image_ImageRegion_h