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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-19 00:47:55 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-19 00:47:55 +0000
commit26a029d407be480d791972afb5975cf62c9360a6 (patch)
treef435a8308119effd964b339f76abb83a57c29483 /gfx/src/nsRect.h
parentInitial commit. (diff)
downloadfirefox-26a029d407be480d791972afb5975cf62c9360a6.tar.xz
firefox-26a029d407be480d791972afb5975cf62c9360a6.zip
Adding upstream version 124.0.1.upstream/124.0.1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'gfx/src/nsRect.h')
-rw-r--r--gfx/src/nsRect.h490
1 files changed, 490 insertions, 0 deletions
diff --git a/gfx/src/nsRect.h b/gfx/src/nsRect.h
new file mode 100644
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+++ b/gfx/src/nsRect.h
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+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef NSRECT_H
+#define NSRECT_H
+
+#include <stdint.h> // for int32_t, int64_t
+#include <algorithm> // for min/max
+#include "mozilla/Likely.h" // for MOZ_UNLIKELY
+#include "mozilla/gfx/BaseRect.h"
+#include "mozilla/gfx/Rect.h"
+#include "nsCoord.h" // for nscoord, etc
+#include "nsISupports.h" // for MOZ_COUNT_CTOR, etc
+#include "nsPoint.h" // for nsIntPoint, nsPoint
+#include "nsSize.h" // for IntSize, nsSize
+#if !defined(ANDROID) && (defined(__SSE2__) || defined(_M_X64) || \
+ (defined(_M_IX86_FP) && _M_IX86_FP >= 2))
+# if defined(_MSC_VER) && !defined(__clang__)
+# include "smmintrin.h"
+# else
+# include "emmintrin.h"
+# endif
+#endif
+
+struct nsMargin;
+
+typedef mozilla::gfx::IntRect nsIntRect;
+
+struct nsRect : public mozilla::gfx::BaseRect<nscoord, nsRect, nsPoint, nsSize,
+ nsMargin> {
+ typedef mozilla::gfx::BaseRect<nscoord, nsRect, nsPoint, nsSize, nsMargin>
+ Super;
+
+ // Constructors
+ nsRect() { MOZ_COUNT_CTOR(nsRect); }
+ nsRect(const nsRect& aRect) : Super(aRect) { MOZ_COUNT_CTOR(nsRect); }
+ nsRect(const nsPoint& aOrigin, const nsSize& aSize) : Super(aOrigin, aSize) {
+ MOZ_COUNT_CTOR(nsRect);
+ }
+ nsRect(nscoord aX, nscoord aY, nscoord aWidth, nscoord aHeight)
+ : Super(aX, aY, aWidth, aHeight) {
+ MOZ_COUNT_CTOR(nsRect);
+ }
+ nsRect& operator=(const nsRect&) = default;
+
+ MOZ_COUNTED_DTOR(nsRect)
+
+ // We have saturating versions of all the Union methods. These avoid
+ // overflowing nscoord values in the 'width' and 'height' fields by
+ // clamping the width and height values to nscoord_MAX if necessary.
+
+ // Returns the smallest rectangle that contains both the area of both
+ // this and aRect. Thus, empty input rectangles are ignored.
+ // Note: if both rectangles are empty, returns aRect.
+ [[nodiscard]] nsRect SaturatingUnion(const nsRect& aRect) const {
+ if (IsEmpty()) {
+ return aRect;
+ } else if (aRect.IsEmpty()) {
+ return *static_cast<const nsRect*>(this);
+ } else {
+ return SaturatingUnionEdges(aRect);
+ }
+ }
+
+ [[nodiscard]] nsRect SaturatingUnionEdges(const nsRect& aRect) const {
+ nscoord resultX = std::min(aRect.X(), x);
+ int64_t w =
+ std::max(int64_t(aRect.X()) + aRect.Width(), int64_t(x) + width) -
+ resultX;
+ if (MOZ_UNLIKELY(w > nscoord_MAX)) {
+ // Clamp huge negative x to nscoord_MIN / 2 and try again.
+ resultX = std::max(resultX, nscoord_MIN / 2);
+ w = std::max(int64_t(aRect.X()) + aRect.Width(), int64_t(x) + width) -
+ resultX;
+ if (MOZ_UNLIKELY(w > nscoord_MAX)) {
+ w = nscoord_MAX;
+ }
+ }
+
+ nscoord resultY = std::min(aRect.y, y);
+ int64_t h =
+ std::max(int64_t(aRect.Y()) + aRect.Height(), int64_t(y) + height) -
+ resultY;
+ if (MOZ_UNLIKELY(h > nscoord_MAX)) {
+ // Clamp huge negative y to nscoord_MIN / 2 and try again.
+ resultY = std::max(resultY, nscoord_MIN / 2);
+ h = std::max(int64_t(aRect.Y()) + aRect.Height(), int64_t(y) + height) -
+ resultY;
+ if (MOZ_UNLIKELY(h > nscoord_MAX)) {
+ h = nscoord_MAX;
+ }
+ }
+ return nsRect(resultX, resultY, nscoord(w), nscoord(h));
+ }
+
+ // Make all nsRect Union methods be saturating.
+ [[nodiscard]] nsRect UnionEdges(const nsRect& aRect) const {
+ return SaturatingUnionEdges(aRect);
+ }
+ [[nodiscard]] nsRect Union(const nsRect& aRect) const {
+ return SaturatingUnion(aRect);
+ }
+ [[nodiscard]] nsRect UnsafeUnion(const nsRect& aRect) const {
+ return Super::Union(aRect);
+ }
+ void UnionRect(const nsRect& aRect1, const nsRect& aRect2) {
+ *this = aRect1.Union(aRect2);
+ }
+
+#if defined(_MSC_VER) && !defined(__clang__) && \
+ (defined(_M_X64) || defined(_M_IX86))
+ // Only MSVC supports inlining intrinsics for archs you're not compiling for.
+ [[nodiscard]] nsRect Intersect(const nsRect& aRect) const {
+ nsRect result;
+ if (mozilla::gfx::Factory::HasSSE4()) {
+ __m128i rect1 = _mm_loadu_si128((__m128i*)&aRect); // x1, y1, w1, h1
+ __m128i rect2 = _mm_loadu_si128((__m128i*)this); // x2, y2, w2, h2
+
+ __m128i resultRect = _mm_max_epi32(rect1, rect2); // xr, yr, zz, zz
+
+ // result.width = std::min<int32_t>(x - result.x + width,
+ // aRect.x - result.x + aRect.width);
+ // result.height = std::min<int32_t>(y - result.y + height,
+ // aRect.y - result.y + aRect.height);
+ __m128i widthheight = _mm_min_epi32(
+ _mm_add_epi32(_mm_sub_epi32(rect1, resultRect),
+ _mm_srli_si128(rect1, 8)),
+ _mm_add_epi32(_mm_sub_epi32(rect2, resultRect),
+ _mm_srli_si128(rect2, 8))); // w, h, zz, zz
+ widthheight = _mm_slli_si128(widthheight, 8); // 00, 00, wr, hr
+
+ resultRect =
+ _mm_blend_epi16(resultRect, widthheight, 0xF0); // xr, yr, wr, hr
+
+ if ((_mm_movemask_ps(_mm_castsi128_ps(
+ _mm_cmplt_epi32(resultRect, _mm_setzero_si128()))) &
+ 0xC) != 0) {
+ // It's potentially more efficient to store all 0s. But the non SSE4
+ // code leaves x/y intact so let's do the same here.
+ resultRect = _mm_and_si128(resultRect,
+ _mm_set_epi32(0, 0, 0xFFFFFFFF, 0xFFFFFFFF));
+ }
+
+ _mm_storeu_si128((__m128i*)&result, resultRect);
+
+ return result;
+ }
+
+ result.x = std::max<int32_t>(x, aRect.x);
+ result.y = std::max<int32_t>(y, aRect.y);
+ result.width = std::min<int32_t>(x - result.x + width,
+ aRect.x - result.x + aRect.width);
+ result.height = std::min<int32_t>(y - result.y + height,
+ aRect.y - result.y + aRect.height);
+ if (result.width < 0 || result.height < 0) {
+ result.SizeTo(0, 0);
+ }
+ return result;
+ }
+
+ bool IntersectRect(const nsRect& aRect1, const nsRect& aRect2) {
+ if (mozilla::gfx::Factory::HasSSE4()) {
+ __m128i rect1 = _mm_loadu_si128((__m128i*)&aRect1); // x1, y1, w1, h1
+ __m128i rect2 = _mm_loadu_si128((__m128i*)&aRect2); // x2, y2, w2, h2
+
+ __m128i resultRect = _mm_max_epi32(rect1, rect2); // xr, yr, zz, zz
+ // result.width = std::min<int32_t>(x - result.x + width,
+ // aRect.x - result.x + aRect.width);
+ // result.height = std::min<int32_t>(y - result.y + height,
+ // aRect.y - result.y + aRect.height);
+ __m128i widthheight = _mm_min_epi32(
+ _mm_add_epi32(_mm_sub_epi32(rect1, resultRect),
+ _mm_srli_si128(rect1, 8)),
+ _mm_add_epi32(_mm_sub_epi32(rect2, resultRect),
+ _mm_srli_si128(rect2, 8))); // w, h, zz, zz
+ widthheight = _mm_slli_si128(widthheight, 8); // 00, 00, wr, hr
+
+ resultRect =
+ _mm_blend_epi16(resultRect, widthheight, 0xF0); // xr, yr, wr, hr
+
+ if ((_mm_movemask_ps(_mm_castsi128_ps(
+ _mm_cmpgt_epi32(resultRect, _mm_setzero_si128()))) &
+ 0xC) != 0xC) {
+ // It's potentially more efficient to store all 0s. But the non SSE4
+ // code leaves x/y intact so let's do the same here.
+ resultRect = _mm_and_si128(resultRect,
+ _mm_set_epi32(0, 0, 0xFFFFFFFF, 0xFFFFFFFF));
+ _mm_storeu_si128((__m128i*)this, resultRect);
+ return false;
+ }
+
+ _mm_storeu_si128((__m128i*)this, resultRect);
+
+ return true;
+ }
+
+ int32_t newX = std::max<int32_t>(aRect1.x, aRect2.x);
+ int32_t newY = std::max<int32_t>(aRect1.y, aRect2.y);
+ width = std::min<int32_t>(aRect1.x - newX + aRect1.width,
+ aRect2.x - newX + aRect2.width);
+ height = std::min<int32_t>(aRect1.y - newY + aRect1.height,
+ aRect2.y - newY + aRect2.height);
+ x = newX;
+ y = newY;
+ if (width <= 0 || height <= 0) {
+ SizeTo(0, 0);
+ return false;
+ }
+ return true;
+ }
+#endif
+
+ // Return whether this rect's right or bottom edge overflow int32.
+ bool Overflows() const;
+
+ /**
+ * Return this rect scaled to a different appunits per pixel (APP) ratio.
+ * In the RoundOut version we make the rect the smallest rect containing the
+ * unrounded result. In the RoundIn version we make the rect the largest rect
+ * contained in the unrounded result.
+ * @param aFromAPP the APP to scale from
+ * @param aToAPP the APP to scale to
+ * @note this can turn an empty rectangle into a non-empty rectangle
+ */
+ [[nodiscard]] inline nsRect ScaleToOtherAppUnitsRoundOut(
+ int32_t aFromAPP, int32_t aToAPP) const;
+ [[nodiscard]] inline nsRect ScaleToOtherAppUnitsRoundIn(int32_t aFromAPP,
+ int32_t aToAPP) const;
+
+ [[nodiscard]] inline mozilla::gfx::IntRect ScaleToNearestPixels(
+ float aXScale, float aYScale, nscoord aAppUnitsPerPixel) const;
+
+ [[nodiscard]] inline mozilla::gfx::IntRect ToNearestPixels(
+ nscoord aAppUnitsPerPixel) const;
+
+ // Note: this can turn an empty rectangle into a non-empty rectangle
+ [[nodiscard]] inline mozilla::gfx::IntRect ScaleToOutsidePixels(
+ float aXScale, float aYScale, nscoord aAppUnitsPerPixel) const;
+
+ // Note: this can turn an empty rectangle into a non-empty rectangle
+ [[nodiscard]] inline mozilla::gfx::IntRect ToOutsidePixels(
+ nscoord aAppUnitsPerPixel) const;
+
+ [[nodiscard]] inline mozilla::gfx::IntRect ScaleToInsidePixels(
+ float aXScale, float aYScale, nscoord aAppUnitsPerPixel) const;
+
+ [[nodiscard]] inline mozilla::gfx::IntRect ToInsidePixels(
+ nscoord aAppUnitsPerPixel) const;
+
+ // This is here only to keep IPDL-generated code happy. DO NOT USE.
+ bool operator==(const nsRect& aRect) const { return IsEqualEdges(aRect); }
+
+ [[nodiscard]] inline nsRect RemoveResolution(const float aResolution) const;
+
+ [[nodiscard]] mozilla::Maybe<nsRect> EdgeInclusiveIntersection(
+ const nsRect& aOther) const {
+ nscoord left = std::max(x, aOther.x);
+ nscoord top = std::max(y, aOther.y);
+ nscoord right = std::min(XMost(), aOther.XMost());
+ nscoord bottom = std::min(YMost(), aOther.YMost());
+ if (left > right || top > bottom) {
+ return mozilla::Nothing();
+ }
+ return mozilla::Some(nsRect(left, top, right - left, bottom - top));
+ }
+};
+
+/*
+ * App Unit/Pixel conversions
+ */
+
+inline nsRect nsRect::ScaleToOtherAppUnitsRoundOut(int32_t aFromAPP,
+ int32_t aToAPP) const {
+ if (aFromAPP == aToAPP) {
+ return *this;
+ }
+
+ nsRect rect;
+ rect.SetBox(NSToCoordFloor(NSCoordScale(x, aFromAPP, aToAPP)),
+ NSToCoordFloor(NSCoordScale(y, aFromAPP, aToAPP)),
+ NSToCoordCeil(NSCoordScale(XMost(), aFromAPP, aToAPP)),
+ NSToCoordCeil(NSCoordScale(YMost(), aFromAPP, aToAPP)));
+ return rect;
+}
+
+inline nsRect nsRect::ScaleToOtherAppUnitsRoundIn(int32_t aFromAPP,
+ int32_t aToAPP) const {
+ if (aFromAPP == aToAPP) {
+ return *this;
+ }
+
+ nsRect rect;
+ rect.SetBox(NSToCoordCeil(NSCoordScale(x, aFromAPP, aToAPP)),
+ NSToCoordCeil(NSCoordScale(y, aFromAPP, aToAPP)),
+ NSToCoordFloor(NSCoordScale(XMost(), aFromAPP, aToAPP)),
+ NSToCoordFloor(NSCoordScale(YMost(), aFromAPP, aToAPP)));
+ return rect;
+}
+
+#if !defined(ANDROID) && (defined(__SSE2__) || defined(_M_X64) || \
+ (defined(_M_IX86_FP) && _M_IX86_FP >= 2))
+// Life would be so much better if we had SSE4 here.
+static MOZ_ALWAYS_INLINE __m128i floor_ps2epi32(__m128 x) {
+ __m128 one = _mm_set_ps(1.0f, 1.0f, 1.0f, 1.0f);
+
+ __m128 t = _mm_cvtepi32_ps(_mm_cvttps_epi32(x));
+ __m128 r = _mm_sub_ps(t, _mm_and_ps(_mm_cmplt_ps(x, t), one));
+
+ return _mm_cvttps_epi32(r);
+}
+
+static MOZ_ALWAYS_INLINE __m128i ceil_ps2epi32(__m128 x) {
+ __m128 t = _mm_sub_ps(_mm_setzero_ps(), x);
+ __m128i r = _mm_sub_epi32(_mm_setzero_si128(), floor_ps2epi32(t));
+
+ return r;
+}
+#endif
+
+// scale the rect but round to preserve centers
+inline mozilla::gfx::IntRect nsRect::ScaleToNearestPixels(
+ float aXScale, float aYScale, nscoord aAppUnitsPerPixel) const {
+ mozilla::gfx::IntRect rect;
+ // Android x86 builds have bindgen issues.
+#if !defined(ANDROID) && (defined(__SSE2__) || defined(_M_X64) || \
+ (defined(_M_IX86_FP) && _M_IX86_FP >= 2))
+ __m128 appUnitsPacked = _mm_set_ps(aAppUnitsPerPixel, aAppUnitsPerPixel,
+ aAppUnitsPerPixel, aAppUnitsPerPixel);
+ __m128 scalesPacked = _mm_set_ps(aYScale, aXScale, aYScale, aXScale);
+ __m128 biasesPacked = _mm_set_ps(0.5f, 0.5f, 0.5f, 0.5f);
+
+ __m128i rectPacked = _mm_loadu_si128((__m128i*)this);
+ __m128i topLeft = _mm_slli_si128(rectPacked, 8);
+
+ rectPacked = _mm_add_epi32(rectPacked, topLeft); // X, Y, XMost(), YMost()
+
+ __m128 rectFloat = _mm_cvtepi32_ps(rectPacked);
+
+ // Scale, i.e. ([ x y xmost ymost ] / aAppUnitsPerPixel) * [ aXScale aYScale
+ // aXScale aYScale ]
+ rectFloat = _mm_mul_ps(_mm_div_ps(rectFloat, appUnitsPacked), scalesPacked);
+
+ // Floor
+ // Executed with bias and roundmode down, since round-nearest rounds 0.5
+ // downward half the time.
+ rectFloat = _mm_add_ps(rectFloat, biasesPacked);
+ rectPacked = floor_ps2epi32(rectFloat);
+
+ topLeft = _mm_slli_si128(rectPacked, 8);
+ rectPacked = _mm_sub_epi32(rectPacked, topLeft); // X, Y, Width, Height
+
+ // Avoid negative width/height due to overflow.
+ __m128i mask = _mm_or_si128(_mm_cmpgt_epi32(rectPacked, _mm_setzero_si128()),
+ _mm_set_epi32(0, 0, 0xFFFFFFFF, 0xFFFFFFFF));
+ // Mask will now contain [ 0xFFFFFFFF 0xFFFFFFFF (width <= 0 ? 0 : 0xFFFFFFFF)
+ // (height <= 0 ? 0 : 0xFFFFFFFF) ]
+ rectPacked = _mm_and_si128(rectPacked, mask);
+
+ _mm_storeu_si128((__m128i*)&rect, rectPacked);
+#else
+ rect.SetNonEmptyBox(
+ NSToIntRoundUp(NSAppUnitsToFloatPixels(x, aAppUnitsPerPixel) * aXScale),
+ NSToIntRoundUp(NSAppUnitsToFloatPixels(y, aAppUnitsPerPixel) * aYScale),
+ NSToIntRoundUp(NSAppUnitsToFloatPixels(XMost(), aAppUnitsPerPixel) *
+ aXScale),
+ NSToIntRoundUp(NSAppUnitsToFloatPixels(YMost(), aAppUnitsPerPixel) *
+ aYScale));
+#endif
+ return rect;
+}
+
+// scale the rect but round to smallest containing rect
+inline mozilla::gfx::IntRect nsRect::ScaleToOutsidePixels(
+ float aXScale, float aYScale, nscoord aAppUnitsPerPixel) const {
+ mozilla::gfx::IntRect rect;
+ // Android x86 builds have bindgen issues.
+#if !defined(ANDROID) && (defined(__SSE2__) || defined(_M_X64) || \
+ (defined(_M_IX86_FP) && _M_IX86_FP >= 2))
+ __m128 appUnitsPacked = _mm_set_ps(aAppUnitsPerPixel, aAppUnitsPerPixel,
+ aAppUnitsPerPixel, aAppUnitsPerPixel);
+ __m128 scalesPacked = _mm_set_ps(aYScale, aXScale, aYScale, aXScale);
+
+ __m128i rectPacked = _mm_loadu_si128((__m128i*)this); // x, y, w, h
+ __m128i topLeft = _mm_slli_si128(rectPacked, 8); // 0, 0, x, y
+
+ rectPacked = _mm_add_epi32(rectPacked, topLeft); // X, Y, XMost(), YMost()
+
+ __m128 rectFloat = _mm_cvtepi32_ps(rectPacked);
+
+ // Scale i.e. ([ x y xmost ymost ] / aAppUnitsPerPixel) *
+ // [ aXScale aYScale aXScale aYScale ]
+ rectFloat = _mm_mul_ps(_mm_div_ps(rectFloat, appUnitsPacked), scalesPacked);
+ rectPacked = ceil_ps2epi32(rectFloat); // xx, xx, XMost(), YMost()
+ __m128i tmp = floor_ps2epi32(rectFloat); // x, y, xx, xx
+
+ // _mm_move_sd is 1 cycle method of getting the blending we want.
+ rectPacked = _mm_castpd_si128(
+ _mm_move_sd(_mm_castsi128_pd(rectPacked),
+ _mm_castsi128_pd(tmp))); // x, y, XMost(), YMost()
+
+ topLeft = _mm_slli_si128(rectPacked, 8); // 0, 0, r.x, r.y
+ rectPacked = _mm_sub_epi32(rectPacked, topLeft); // r.x, r.y, r.w, r.h
+
+ // Avoid negative width/height due to overflow.
+ __m128i mask = _mm_or_si128(_mm_cmpgt_epi32(rectPacked, _mm_setzero_si128()),
+ _mm_set_epi32(0, 0, 0xFFFFFFFF, 0xFFFFFFFF));
+ // clang-format off
+ // Mask will now contain [ 0xFFFFFFFF 0xFFFFFFFF (width <= 0 ? 0 : 0xFFFFFFFF) (height <= 0 ? 0 : 0xFFFFFFFF) ]
+ // clang-format on
+ rectPacked = _mm_and_si128(rectPacked, mask);
+
+ _mm_storeu_si128((__m128i*)&rect, rectPacked);
+#else
+ rect.SetNonEmptyBox(
+ NSToIntFloor(NSAppUnitsToFloatPixels(x, float(aAppUnitsPerPixel)) *
+ aXScale),
+ NSToIntFloor(NSAppUnitsToFloatPixels(y, float(aAppUnitsPerPixel)) *
+ aYScale),
+ NSToIntCeil(NSAppUnitsToFloatPixels(XMost(), float(aAppUnitsPerPixel)) *
+ aXScale),
+ NSToIntCeil(NSAppUnitsToFloatPixels(YMost(), float(aAppUnitsPerPixel)) *
+ aYScale));
+#endif
+ return rect;
+}
+
+// scale the rect but round to largest contained rect
+inline mozilla::gfx::IntRect nsRect::ScaleToInsidePixels(
+ float aXScale, float aYScale, nscoord aAppUnitsPerPixel) const {
+ mozilla::gfx::IntRect rect;
+ rect.SetNonEmptyBox(
+ NSToIntCeil(NSAppUnitsToFloatPixels(x, float(aAppUnitsPerPixel)) *
+ aXScale),
+ NSToIntCeil(NSAppUnitsToFloatPixels(y, float(aAppUnitsPerPixel)) *
+ aYScale),
+ NSToIntFloor(NSAppUnitsToFloatPixels(XMost(), float(aAppUnitsPerPixel)) *
+ aXScale),
+ NSToIntFloor(NSAppUnitsToFloatPixels(YMost(), float(aAppUnitsPerPixel)) *
+ aYScale));
+ return rect;
+}
+
+inline mozilla::gfx::IntRect nsRect::ToNearestPixels(
+ nscoord aAppUnitsPerPixel) const {
+ return ScaleToNearestPixels(1.0f, 1.0f, aAppUnitsPerPixel);
+}
+
+inline mozilla::gfx::IntRect nsRect::ToOutsidePixels(
+ nscoord aAppUnitsPerPixel) const {
+ return ScaleToOutsidePixels(1.0f, 1.0f, aAppUnitsPerPixel);
+}
+
+inline mozilla::gfx::IntRect nsRect::ToInsidePixels(
+ nscoord aAppUnitsPerPixel) const {
+ return ScaleToInsidePixels(1.0f, 1.0f, aAppUnitsPerPixel);
+}
+
+inline nsRect nsRect::RemoveResolution(const float aResolution) const {
+ MOZ_ASSERT(aResolution > 0.0f);
+ nsRect rect;
+ rect.MoveTo(NSToCoordRound(NSCoordToFloat(x) / aResolution),
+ NSToCoordRound(NSCoordToFloat(y) / aResolution));
+ // A 1x1 rect indicates we are just hit testing a point, so pass down a 1x1
+ // rect as well instead of possibly rounding the width or height to zero.
+ if (width == 1 && height == 1) {
+ rect.SizeTo(1, 1);
+ } else {
+ rect.SizeTo(NSToCoordCeil(NSCoordToFloat(width) / aResolution),
+ NSToCoordCeil(NSCoordToFloat(height) / aResolution));
+ }
+
+ return rect;
+}
+
+const mozilla::gfx::IntRect& GetMaxSizedIntRect();
+
+// app units are integer multiples of pixels, so no rounding needed
+template <class units>
+nsRect ToAppUnits(const mozilla::gfx::IntRectTyped<units>& aRect,
+ nscoord aAppUnitsPerPixel) {
+ return nsRect(NSIntPixelsToAppUnits(aRect.X(), aAppUnitsPerPixel),
+ NSIntPixelsToAppUnits(aRect.Y(), aAppUnitsPerPixel),
+ NSIntPixelsToAppUnits(aRect.Width(), aAppUnitsPerPixel),
+ NSIntPixelsToAppUnits(aRect.Height(), aAppUnitsPerPixel));
+}
+
+#endif /* NSRECT_H */