The Tor Browser: gfx/src/nsSize.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 NSSIZE_H

     7 #define NSSIZE_H

     9 #include "nsCoord.h"

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

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

    13 // Maximum allowable size

    14 #define NS_MAXSIZE nscoord_MAX

    16 struct nsIntSize;

    17 typedef nsIntSize gfxIntSize;

    19 struct nsSize : public mozilla::gfx::BaseSize<nscoord, nsSize> {

    20   typedef mozilla::gfx::BaseSize<nscoord, nsSize> Super;

    22   nsSize() : Super() {}

    23   nsSize(nscoord aWidth, nscoord aHeight) : Super(aWidth, aHeight) {}

    25   inline nsIntSize ScaleToNearestPixels(float aXScale, float aYScale,

    26                                         nscoord aAppUnitsPerPixel) const;

    27   inline nsIntSize ToNearestPixels(nscoord aAppUnitsPerPixel) const;

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

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

    31 };

    33 struct nsIntSize : public mozilla::gfx::BaseSize<int32_t, nsIntSize> {

    34   typedef mozilla::gfx::BaseSize<int32_t, nsIntSize> Super;

    36   nsIntSize() : Super() {}

    37   nsIntSize(int32_t aWidth, int32_t aHeight) : Super(aWidth, aHeight) {}

    39   inline nsSize ToAppUnits(nscoord aAppUnitsPerPixel) const;

    40   mozilla::gfx::IntSize ToIntSize() const

    41   {

    42     return mozilla::gfx::IntSize(width, height);

    43   };

    44 };

    46 inline nsIntSize

    47 nsSize::ScaleToNearestPixels(float aXScale, float aYScale,

    48                              nscoord aAppUnitsPerPixel) const

    49 {

    50   return nsIntSize(

    51       NSToIntRoundUp(NSAppUnitsToDoublePixels(width, aAppUnitsPerPixel) * aXScale),

    52       NSToIntRoundUp(NSAppUnitsToDoublePixels(height, aAppUnitsPerPixel) * aYScale));

    53 }

    55 inline nsIntSize

    56 nsSize::ToNearestPixels(nscoord aAppUnitsPerPixel) const

    57 {

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

    59 }

    61 inline nsSize

    62 nsSize::ConvertAppUnits(int32_t aFromAPP, int32_t aToAPP) const {

    63   if (aFromAPP != aToAPP) {

    64     nsSize size;

    65     size.width = NSToCoordRound(NSCoordScale(width, aFromAPP, aToAPP));

    66     size.height = NSToCoordRound(NSCoordScale(height, aFromAPP, aToAPP));

    67     return size;

    68   }

    69   return *this;

    70 }

    72 inline nsSize

    73 nsIntSize::ToAppUnits(nscoord aAppUnitsPerPixel) const

    74 {

    75   return nsSize(NSIntPixelsToAppUnits(width, aAppUnitsPerPixel),

    76                 NSIntPixelsToAppUnits(height, aAppUnitsPerPixel));

    77 }

    79 #endif /* NSSIZE_H */

The Tor Browser / file revision

gfx/src/nsSize.h@97036ab72558

gfx/src/nsSize.h