backout 29799f914cab, Bug 917642 - [Helix] Please update the helix blobs
[gecko.git] / gfx / src / nsSize.h
blobcc0d7975003ef370694b7a28c92733347f7941a5
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;
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 operator mozilla::gfx::IntSize() const { return mozilla::gfx::IntSize(width, height); };
43 inline nsIntSize
44 nsSize::ScaleToNearestPixels(float aXScale, float aYScale,
45 nscoord aAppUnitsPerPixel) const
47 return nsIntSize(
48 NSToIntRoundUp(NSAppUnitsToDoublePixels(width, aAppUnitsPerPixel) * aXScale),
49 NSToIntRoundUp(NSAppUnitsToDoublePixels(height, aAppUnitsPerPixel) * aYScale));
52 inline nsIntSize
53 nsSize::ToNearestPixels(nscoord aAppUnitsPerPixel) const
55 return ScaleToNearestPixels(1.0f, 1.0f, aAppUnitsPerPixel);
58 inline nsSize
59 nsSize::ConvertAppUnits(int32_t aFromAPP, int32_t aToAPP) const {
60 if (aFromAPP != aToAPP) {
61 nsSize size;
62 size.width = NSToCoordRound(NSCoordScale(width, aFromAPP, aToAPP));
63 size.height = NSToCoordRound(NSCoordScale(height, aFromAPP, aToAPP));
64 return size;
66 return *this;
69 inline nsSize
70 nsIntSize::ToAppUnits(nscoord aAppUnitsPerPixel) const
72 return nsSize(NSIntPixelsToAppUnits(width, aAppUnitsPerPixel),
73 NSIntPixelsToAppUnits(height, aAppUnitsPerPixel));
76 #endif /* NSSIZE_H */