The Tor Browser: gfx/src/nsPoint.h@97036ab72558

Conditionally force memory storage according to privacy.thirdparty.isolate;
This solves Tor bug #9701, complying with disk avoidance documented in
https://www.torproject.org/projects/torbrowser/design/#disk-avoidance.

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

     2 /* This Source Code Form is subject to the terms of the Mozilla Public

     3  * License, v. 2.0. If a copy of the MPL was not distributed with this

     4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

     6 #ifndef NSPOINT_H

     7 #define NSPOINT_H

     9 #include "nsCoord.h"

    10 #include "mozilla/gfx/BaseSize.h"

    11 #include "mozilla/gfx/BasePoint.h"

    12 #include "nsSize.h"

    14 struct nsIntPoint;

    16 // nsPoint represents a point in app units.

    18 struct nsPoint : public mozilla::gfx::BasePoint<nscoord, nsPoint> {

    19   typedef mozilla::gfx::BasePoint<nscoord, nsPoint> Super;

    21   nsPoint() : Super() {}

    22   nsPoint(const nsPoint& aPoint) : Super(aPoint) {}

    23   nsPoint(nscoord aX, nscoord aY) : Super(aX, aY) {}

    25   inline nsIntPoint ScaleToNearestPixels(float aXScale, float aYScale,

    26                                          nscoord aAppUnitsPerPixel) const;

    27   inline nsIntPoint ToNearestPixels(nscoord aAppUnitsPerPixel) const;

    29   // Converts this point from aFromAPP, an appunits per pixel ratio, to aToAPP.

    30   inline nsPoint ConvertAppUnits(int32_t aFromAPP, int32_t aToAPP) const;

    31 };

    33 // nsIntPoint represents a point in one of the types of pixels.

    34 // Uses of nsIntPoint should eventually be converted to CSSIntPoint,

    35 // LayoutDeviceIntPoint, etc. (see layout/base/Units.h).

    37 struct nsIntPoint : public mozilla::gfx::BasePoint<int32_t, nsIntPoint> {

    38   typedef mozilla::gfx::BasePoint<int32_t, nsIntPoint> Super;

    40   nsIntPoint() : Super() {}

    41   nsIntPoint(const nsIntPoint& aPoint) : Super(aPoint) {}

    42   nsIntPoint(int32_t aX, int32_t aY) : Super(aX, aY) {}

    44   inline nsPoint ToAppUnits(nscoord aAppUnitsPerPixel) const;

    45 };

    47 inline nsIntPoint

    48 nsPoint::ScaleToNearestPixels(float aXScale, float aYScale,

    49                               nscoord aAppUnitsPerPixel) const

    50 {

    51   return nsIntPoint(

    52       NSToIntRoundUp(NSAppUnitsToDoublePixels(x, aAppUnitsPerPixel) * aXScale),

    53       NSToIntRoundUp(NSAppUnitsToDoublePixels(y, aAppUnitsPerPixel) * aYScale));

    54 }

    56 inline nsIntPoint

    57 nsPoint::ToNearestPixels(nscoord aAppUnitsPerPixel) const

    58 {

    59   return ScaleToNearestPixels(1.0f, 1.0f, aAppUnitsPerPixel);

    60 }

    62 inline nsPoint

    63 nsPoint::ConvertAppUnits(int32_t aFromAPP, int32_t aToAPP) const

    64 {

    65   if (aFromAPP != aToAPP) {

    66     nsPoint point;

    67     point.x = NSToCoordRound(NSCoordScale(x, aFromAPP, aToAPP));

    68     point.y = NSToCoordRound(NSCoordScale(y, aFromAPP, aToAPP));

    69     return point;

    70   }

    71   return *this;

    72 }

    74 // app units are integer multiples of pixels, so no rounding needed

    75 inline nsPoint

    76 nsIntPoint::ToAppUnits(nscoord aAppUnitsPerPixel) const

    77 {

    78   return nsPoint(NSIntPixelsToAppUnits(x, aAppUnitsPerPixel),

    79                  NSIntPixelsToAppUnits(y, aAppUnitsPerPixel));

    80 }

    82 #endif /* NSPOINT_H */

The Tor Browser / file revision

gfx/src/nsPoint.h@97036ab72558

gfx/src/nsPoint.h