The Tor Browser: widget/xpwidgets/WidgetUtils.cpp@b8a032363ba2

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

     1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-

     2  * vim: sw=2 ts=8 et :

     3  */

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

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

     6  * You can obtain one at http://mozilla.org/MPL/2.0/. */

     8 #include "mozilla/WidgetUtils.h"

    10 namespace mozilla {

    12 gfx::Matrix

    13 ComputeTransformForRotation(const nsIntRect& aBounds,

    14                               ScreenRotation aRotation)

    15 {

    16     gfx::Matrix transform;

    17     switch (aRotation) {

    18     case ROTATION_0:

    19         break;

    20     case ROTATION_90:

    21         transform.Translate(aBounds.width, 0);

    22         transform = gfx::Matrix::Rotation(M_PI / 2) * transform;

    23         break;

    24     case ROTATION_180:

    25         transform.Translate(aBounds.width, aBounds.height);

    26         transform = gfx::Matrix::Rotation(M_PI) * transform;

    27         break;

    28     case ROTATION_270:

    29         transform.Translate(0, aBounds.height);

    30         transform = gfx::Matrix::Rotation(M_PI * 3 / 2) * transform;

    31         break;

    32     default:

    33         MOZ_CRASH("Unknown rotation");

    34     }

    35     return transform;

    36 }

    38 } // namespace mozilla

The Tor Browser / file revision