gfx/src/nsTransform2D.h@97036ab72558 (annotated)
gfx/src/nsTransform2D.h
Tue, 06 Jan 2015 21:39:09 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Tue, 06 Jan 2015 21:39:09 +0100
- branch
- TOR_BUG_9701
- changeset 8
- 97036ab72558
- permissions
- -rw-r--r--
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.
| michael@0 | 1 | /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ |
| michael@0 | 2 | /* This Source Code Form is subject to the terms of the Mozilla Public |
| michael@0 | 3 | * License, v. 2.0. If a copy of the MPL was not distributed with this |
| michael@0 | 4 | * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ |
| michael@0 | 5 | |
| michael@0 | 6 | #ifndef nsTransform2D_h___ |
| michael@0 | 7 | #define nsTransform2D_h___ |
| michael@0 | 8 | |
| michael@0 | 9 | #include "gfxCore.h" |
| michael@0 | 10 | #include "nsCoord.h" |
| michael@0 | 11 | |
| michael@0 | 12 | class NS_GFX nsTransform2D |
| michael@0 | 13 | { |
| michael@0 | 14 | private: |
| michael@0 | 15 | /** |
| michael@0 | 16 | * This represents the following matrix (note that the order of row/column |
| michael@0 | 17 | * indices is opposite to usual notation) |
| michael@0 | 18 | * |
| michael@0 | 19 | * / m00 0 m20 \ |
| michael@0 | 20 | * M = | 0 m11 m21 | |
| michael@0 | 21 | * \ 0 0 1 / |
| michael@0 | 22 | * |
| michael@0 | 23 | * Transformation of a coordinate (x, y) is obtained by setting |
| michael@0 | 24 | * v = (x, y, 1)^T and evaluating M . v |
| michael@0 | 25 | **/ |
| michael@0 | 26 | |
| michael@0 | 27 | float m00, m11, m20, m21; |
| michael@0 | 28 | |
| michael@0 | 29 | public: |
| michael@0 | 30 | nsTransform2D(void) { m20 = m21 = 0.0f; m00 = m11 = 1.0f; } |
| michael@0 | 31 | nsTransform2D(nsTransform2D *aTransform2D) { |
| michael@0 | 32 | m00 = aTransform2D->m00; |
| michael@0 | 33 | m11 = aTransform2D->m11; |
| michael@0 | 34 | m20 = aTransform2D->m20; |
| michael@0 | 35 | m21 = aTransform2D->m21; |
| michael@0 | 36 | } |
| michael@0 | 37 | |
| michael@0 | 38 | ~nsTransform2D(void) { } |
| michael@0 | 39 | |
| michael@0 | 40 | /** |
| michael@0 | 41 | * set this transform to a translation |
| michael@0 | 42 | * |
| michael@0 | 43 | * @param tx, x translation |
| michael@0 | 44 | * @param ty, y translation |
| michael@0 | 45 | **/ |
| michael@0 | 46 | |
| michael@0 | 47 | void SetToTranslate(float tx, float ty) { m00 = m11 = 1.0f; m20 = tx; m21 = ty; } |
| michael@0 | 48 | |
| michael@0 | 49 | /** |
| michael@0 | 50 | * get the translation portion of this transform |
| michael@0 | 51 | * |
| michael@0 | 52 | * @param pt, Point to return translation values in |
| michael@0 | 53 | **/ |
| michael@0 | 54 | |
| michael@0 | 55 | void GetTranslationCoord(nscoord *ptX, nscoord *ptY) const { *ptX = NSToCoordRound(m20); *ptY = NSToCoordRound(m21); } |
| michael@0 | 56 | |
| michael@0 | 57 | /** |
| michael@0 | 58 | * apply matrix to vector |
| michael@0 | 59 | * |
| michael@0 | 60 | * @param pt Point to transform |
| michael@0 | 61 | **/ |
| michael@0 | 62 | |
| michael@0 | 63 | void TransformCoord(nscoord *ptX, nscoord *ptY) const; |
| michael@0 | 64 | |
| michael@0 | 65 | /** |
| michael@0 | 66 | * apply matrix to rect |
| michael@0 | 67 | * |
| michael@0 | 68 | * @param rect Rect to transform |
| michael@0 | 69 | **/ |
| michael@0 | 70 | |
| michael@0 | 71 | void TransformCoord(nscoord *aX, nscoord *aY, nscoord *aWidth, nscoord *aHeight) const; |
| michael@0 | 72 | |
| michael@0 | 73 | /** |
| michael@0 | 74 | * add a scale to a Transform via x, y pair |
| michael@0 | 75 | * |
| michael@0 | 76 | * @param ptX x value to add as x scale |
| michael@0 | 77 | * @param ptY y value to add as y scale |
| michael@0 | 78 | **/ |
| michael@0 | 79 | |
| michael@0 | 80 | void AddScale(float ptX, float ptY) { m00 *= ptX; m11 *= ptY; } |
| michael@0 | 81 | |
| michael@0 | 82 | /** |
| michael@0 | 83 | * Set the scale (overriding any previous calls to AddScale, but leaving |
| michael@0 | 84 | * any existing translation). |
| michael@0 | 85 | * |
| michael@0 | 86 | * @param ptX x value to add as x scale |
| michael@0 | 87 | * @param ptY y value to add as y scale |
| michael@0 | 88 | **/ |
| michael@0 | 89 | |
| michael@0 | 90 | void SetScale(float ptX, float ptY) { m00 = ptX; m11 = ptY; } |
| michael@0 | 91 | }; |
| michael@0 | 92 | |
| michael@0 | 93 | #endif |
