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- /*
- * Copyright 2006 The Android Open Source Project
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
- #ifndef SkRect_DEFINED
- #define SkRect_DEFINED
- #include "include/core/SkPoint.h"
- #include "include/core/SkSize.h"
- #include "include/private/SkSafe32.h"
- #include "include/private/SkTFitsIn.h"
- #include <utility>
- struct SkRect;
- /** \struct SkIRect
- SkIRect holds four 32-bit integer coordinates describing the upper and
- lower bounds of a rectangle. SkIRect may be created from outer bounds or
- from position, width, and height. SkIRect describes an area; if its right
- is less than or equal to its left, or if its bottom is less than or equal to
- its top, it is considered empty.
- */
- struct SK_API SkIRect {
- int32_t fLeft; //!< smaller x-axis bounds
- int32_t fTop; //!< smaller y-axis bounds
- int32_t fRight; //!< larger x-axis bounds
- int32_t fBottom; //!< larger y-axis bounds
- /** Returns constructed SkIRect set to (0, 0, 0, 0).
- Many other rectangles are empty; if left is equal to or greater than right,
- or if top is equal to or greater than bottom. Setting all members to zero
- is a convenience, but does not designate a special empty rectangle.
- @return bounds (0, 0, 0, 0)
- */
- static constexpr SkIRect SK_WARN_UNUSED_RESULT MakeEmpty() {
- return SkIRect{0, 0, 0, 0};
- }
- /** Returns constructed SkIRect set to (0, 0, w, h). Does not validate input; w or h
- may be negative.
- @param w width of constructed SkIRect
- @param h height of constructed SkIRect
- @return bounds (0, 0, w, h)
- */
- static constexpr SkIRect SK_WARN_UNUSED_RESULT MakeWH(int32_t w, int32_t h) {
- return SkIRect{0, 0, w, h};
- }
- /** Returns constructed SkIRect set to (0, 0, size.width(), size.height()).
- Does not validate input; size.width() or size.height() may be negative.
- @param size values for SkIRect width and height
- @return bounds (0, 0, size.width(), size.height())
- */
- static constexpr SkIRect SK_WARN_UNUSED_RESULT MakeSize(const SkISize& size) {
- return SkIRect{0, 0, size.fWidth, size.fHeight};
- }
- /** Returns constructed SkIRect set to (l, t, r, b). Does not sort input; SkIRect may
- result in fLeft greater than fRight, or fTop greater than fBottom.
- @param l integer stored in fLeft
- @param t integer stored in fTop
- @param r integer stored in fRight
- @param b integer stored in fBottom
- @return bounds (l, t, r, b)
- */
- static constexpr SkIRect SK_WARN_UNUSED_RESULT MakeLTRB(int32_t l, int32_t t,
- int32_t r, int32_t b) {
- return SkIRect{l, t, r, b};
- }
- /** Returns constructed SkIRect set to: (x, y, x + w, y + h).
- Does not validate input; w or h may be negative.
- @param x stored in fLeft
- @param y stored in fTop
- @param w added to x and stored in fRight
- @param h added to y and stored in fBottom
- @return bounds at (x, y) with width w and height h
- */
- static constexpr SkIRect SK_WARN_UNUSED_RESULT MakeXYWH(int32_t x, int32_t y,
- int32_t w, int32_t h) {
- return { x, y, Sk32_sat_add(x, w), Sk32_sat_add(y, h) };
- }
- /** Returns left edge of SkIRect, if sorted.
- Call sort() to reverse fLeft and fRight if needed.
- @return fLeft
- */
- int32_t left() const { return fLeft; }
- /** Returns top edge of SkIRect, if sorted. Call isEmpty() to see if SkIRect may be invalid,
- and sort() to reverse fTop and fBottom if needed.
- @return fTop
- */
- int32_t top() const { return fTop; }
- /** Returns right edge of SkIRect, if sorted.
- Call sort() to reverse fLeft and fRight if needed.
- @return fRight
- */
- int32_t right() const { return fRight; }
- /** Returns bottom edge of SkIRect, if sorted. Call isEmpty() to see if SkIRect may be invalid,
- and sort() to reverse fTop and fBottom if needed.
- @return fBottom
- */
- int32_t bottom() const { return fBottom; }
- /** Returns left edge of SkIRect, if sorted. Call isEmpty() to see if SkIRect may be invalid,
- and sort() to reverse fLeft and fRight if needed.
- @return fLeft
- */
- int32_t x() const { return fLeft; }
- /** Returns top edge of SkIRect, if sorted. Call isEmpty() to see if SkIRect may be invalid,
- and sort() to reverse fTop and fBottom if needed.
- @return fTop
- */
- int32_t y() const { return fTop; }
- // Experimental
- SkIPoint topLeft() const { return {fLeft, fTop}; }
- /** Returns span on the x-axis. This does not check if SkIRect is sorted, or if
- result fits in 32-bit signed integer; result may be negative.
- @return fRight minus fLeft
- */
- int32_t width() const { return Sk32_can_overflow_sub(fRight, fLeft); }
- /** Returns span on the y-axis. This does not check if SkIRect is sorted, or if
- result fits in 32-bit signed integer; result may be negative.
- @return fBottom minus fTop
- */
- int32_t height() const { return Sk32_can_overflow_sub(fBottom, fTop); }
- /** Returns spans on the x-axis and y-axis. This does not check if SkIRect is sorted,
- or if result fits in 32-bit signed integer; result may be negative.
- @return SkISize (width, height)
- */
- SkISize size() const { return SkISize::Make(this->width(), this->height()); }
- /** Returns span on the x-axis. This does not check if SkIRect is sorted, so the
- result may be negative. This is safer than calling width() since width() might
- overflow in its calculation.
- @return fRight minus fLeft cast to int64_t
- */
- int64_t width64() const { return (int64_t)fRight - (int64_t)fLeft; }
- /** Returns span on the y-axis. This does not check if SkIRect is sorted, so the
- result may be negative. This is safer than calling height() since height() might
- overflow in its calculation.
- @return fBottom minus fTop cast to int64_t
- */
- int64_t height64() const { return (int64_t)fBottom - (int64_t)fTop; }
- /** Returns true if fLeft is equal to or greater than fRight, or if fTop is equal
- to or greater than fBottom. Call sort() to reverse rectangles with negative
- width64() or height64().
- @return true if width64() or height64() are zero or negative
- */
- bool isEmpty64() const { return fRight <= fLeft || fBottom <= fTop; }
- /** Returns true if width() or height() are zero or negative.
- @return true if width() or height() are zero or negative
- */
- bool isEmpty() const {
- int64_t w = this->width64();
- int64_t h = this->height64();
- if (w <= 0 || h <= 0) {
- return true;
- }
- // Return true if either exceeds int32_t
- return !SkTFitsIn<int32_t>(w | h);
- }
- /** Returns true if all members in a: fLeft, fTop, fRight, and fBottom; are
- identical to corresponding members in b.
- @param a SkIRect to compare
- @param b SkIRect to compare
- @return true if members are equal
- */
- friend bool operator==(const SkIRect& a, const SkIRect& b) {
- return !memcmp(&a, &b, sizeof(a));
- }
- /** Returns true if any member in a: fLeft, fTop, fRight, and fBottom; is not
- identical to the corresponding member in b.
- @param a SkIRect to compare
- @param b SkIRect to compare
- @return true if members are not equal
- */
- friend bool operator!=(const SkIRect& a, const SkIRect& b) {
- return !(a == b);
- }
- /** Sets SkIRect to (0, 0, 0, 0).
- Many other rectangles are empty; if left is equal to or greater than right,
- or if top is equal to or greater than bottom. Setting all members to zero
- is a convenience, but does not designate a special empty rectangle.
- */
- void setEmpty() { memset(this, 0, sizeof(*this)); }
- /** Sets SkIRect to (left, top, right, bottom).
- left and right are not sorted; left is not necessarily less than right.
- top and bottom are not sorted; top is not necessarily less than bottom.
- @param left assigned to fLeft
- @param top assigned to fTop
- @param right assigned to fRight
- @param bottom assigned to fBottom
- */
- void set(int32_t left, int32_t top, int32_t right, int32_t bottom) {
- fLeft = left;
- fTop = top;
- fRight = right;
- fBottom = bottom;
- }
- /** Sets SkIRect to (left, top, right, bottom).
- left and right are not sorted; left is not necessarily less than right.
- top and bottom are not sorted; top is not necessarily less than bottom.
- @param left stored in fLeft
- @param top stored in fTop
- @param right stored in fRight
- @param bottom stored in fBottom
- */
- void setLTRB(int32_t left, int32_t top, int32_t right, int32_t bottom) {
- this->set(left, top, right, bottom);
- }
- /** Sets SkIRect to: (x, y, x + width, y + height).
- Does not validate input; width or height may be negative.
- @param x stored in fLeft
- @param y stored in fTop
- @param width added to x and stored in fRight
- @param height added to y and stored in fBottom
- */
- void setXYWH(int32_t x, int32_t y, int32_t width, int32_t height) {
- fLeft = x;
- fTop = y;
- fRight = Sk32_sat_add(x, width);
- fBottom = Sk32_sat_add(y, height);
- }
- /** Returns SkIRect offset by (dx, dy).
- If dx is negative, SkIRect returned is moved to the left.
- If dx is positive, SkIRect returned is moved to the right.
- If dy is negative, SkIRect returned is moved upward.
- If dy is positive, SkIRect returned is moved downward.
- @param dx offset added to fLeft and fRight
- @param dy offset added to fTop and fBottom
- @return SkIRect offset by dx and dy, with original width and height
- */
- SkIRect makeOffset(int32_t dx, int32_t dy) const {
- return {
- Sk32_sat_add(fLeft, dx), Sk32_sat_add(fTop, dy),
- Sk32_sat_add(fRight, dx), Sk32_sat_add(fBottom, dy),
- };
- }
- /** Returns SkIRect, inset by (dx, dy).
- If dx is negative, SkIRect returned is wider.
- If dx is positive, SkIRect returned is narrower.
- If dy is negative, SkIRect returned is taller.
- If dy is positive, SkIRect returned is shorter.
- @param dx offset added to fLeft and subtracted from fRight
- @param dy offset added to fTop and subtracted from fBottom
- @return SkIRect inset symmetrically left and right, top and bottom
- */
- SkIRect makeInset(int32_t dx, int32_t dy) const {
- return {
- Sk32_sat_add(fLeft, dx), Sk32_sat_add(fTop, dy),
- Sk32_sat_sub(fRight, dx), Sk32_sat_sub(fBottom, dy),
- };
- }
- /** Returns SkIRect, outset by (dx, dy).
- If dx is negative, SkIRect returned is narrower.
- If dx is positive, SkIRect returned is wider.
- If dy is negative, SkIRect returned is shorter.
- If dy is positive, SkIRect returned is taller.
- @param dx offset subtracted to fLeft and added from fRight
- @param dy offset subtracted to fTop and added from fBottom
- @return SkIRect outset symmetrically left and right, top and bottom
- */
- SkIRect makeOutset(int32_t dx, int32_t dy) const {
- return {
- Sk32_sat_sub(fLeft, dx), Sk32_sat_sub(fTop, dy),
- Sk32_sat_add(fRight, dx), Sk32_sat_add(fBottom, dy),
- };
- }
- /** Offsets SkIRect by adding dx to fLeft, fRight; and by adding dy to fTop, fBottom.
- If dx is negative, moves SkIRect returned to the left.
- If dx is positive, moves SkIRect returned to the right.
- If dy is negative, moves SkIRect returned upward.
- If dy is positive, moves SkIRect returned downward.
- @param dx offset added to fLeft and fRight
- @param dy offset added to fTop and fBottom
- */
- void offset(int32_t dx, int32_t dy) {
- fLeft = Sk32_sat_add(fLeft, dx);
- fTop = Sk32_sat_add(fTop, dy);
- fRight = Sk32_sat_add(fRight, dx);
- fBottom = Sk32_sat_add(fBottom, dy);
- }
- /** Offsets SkIRect by adding delta.fX to fLeft, fRight; and by adding delta.fY to
- fTop, fBottom.
- If delta.fX is negative, moves SkIRect returned to the left.
- If delta.fX is positive, moves SkIRect returned to the right.
- If delta.fY is negative, moves SkIRect returned upward.
- If delta.fY is positive, moves SkIRect returned downward.
- @param delta offset added to SkIRect
- */
- void offset(const SkIPoint& delta) {
- this->offset(delta.fX, delta.fY);
- }
- /** Offsets SkIRect so that fLeft equals newX, and fTop equals newY. width and height
- are unchanged.
- @param newX stored in fLeft, preserving width()
- @param newY stored in fTop, preserving height()
- */
- void offsetTo(int32_t newX, int32_t newY) {
- fRight = Sk64_pin_to_s32((int64_t)fRight + newX - fLeft);
- fBottom = Sk64_pin_to_s32((int64_t)fBottom + newY - fTop);
- fLeft = newX;
- fTop = newY;
- }
- /** Insets SkIRect by (dx,dy).
- If dx is positive, makes SkIRect narrower.
- If dx is negative, makes SkIRect wider.
- If dy is positive, makes SkIRect shorter.
- If dy is negative, makes SkIRect taller.
- @param dx offset added to fLeft and subtracted from fRight
- @param dy offset added to fTop and subtracted from fBottom
- */
- void inset(int32_t dx, int32_t dy) {
- fLeft = Sk32_sat_add(fLeft, dx);
- fTop = Sk32_sat_add(fTop, dy);
- fRight = Sk32_sat_sub(fRight, dx);
- fBottom = Sk32_sat_sub(fBottom, dy);
- }
- /** Outsets SkIRect by (dx, dy).
- If dx is positive, makes SkIRect wider.
- If dx is negative, makes SkIRect narrower.
- If dy is positive, makes SkIRect taller.
- If dy is negative, makes SkIRect shorter.
- @param dx subtracted to fLeft and added from fRight
- @param dy subtracted to fTop and added from fBottom
- */
- void outset(int32_t dx, int32_t dy) { this->inset(-dx, -dy); }
- /** Adjusts SkIRect by adding dL to fLeft, dT to fTop, dR to fRight, and dB to fBottom.
- If dL is positive, narrows SkIRect on the left. If negative, widens it on the left.
- If dT is positive, shrinks SkIRect on the top. If negative, lengthens it on the top.
- If dR is positive, narrows SkIRect on the right. If negative, widens it on the right.
- If dB is positive, shrinks SkIRect on the bottom. If negative, lengthens it on the bottom.
- The resulting SkIRect is not checked for validity. Thus, if the resulting SkIRect left is
- greater than right, the SkIRect will be considered empty. Call sort() after this call
- if that is not the desired behavior.
- @param dL offset added to fLeft
- @param dT offset added to fTop
- @param dR offset added to fRight
- @param dB offset added to fBottom
- */
- void adjust(int32_t dL, int32_t dT, int32_t dR, int32_t dB) {
- fLeft = Sk32_sat_add(fLeft, dL);
- fTop = Sk32_sat_add(fTop, dT);
- fRight = Sk32_sat_add(fRight, dR);
- fBottom = Sk32_sat_add(fBottom, dB);
- }
- /** Returns true if: fLeft <= x < fRight && fTop <= y < fBottom.
- Returns false if SkIRect is empty.
- Considers input to describe constructed SkIRect: (x, y, x + 1, y + 1) and
- returns true if constructed area is completely enclosed by SkIRect area.
- @param x test SkIPoint x-coordinate
- @param y test SkIPoint y-coordinate
- @return true if (x, y) is inside SkIRect
- */
- bool contains(int32_t x, int32_t y) const {
- return x >= fLeft && x < fRight && y >= fTop && y < fBottom;
- }
- /** Constructs SkIRect to intersect from (left, top, right, bottom). Does not sort
- construction.
- Returns true if SkIRect contains construction.
- Returns false if SkIRect is empty or construction is empty.
- @param left x-axis minimum of constructed SkIRect
- @param top y-axis minimum of constructed SkIRect
- @param right x-axis maximum of constructed SkIRect
- @param bottom y-axis maximum of constructed SkIRect
- @return true if all sides of SkIRect are outside construction
- */
- bool contains(int32_t left, int32_t top, int32_t right, int32_t bottom) const {
- return left < right && top < bottom && !this->isEmpty() && // check for empties
- fLeft <= left && fTop <= top &&
- fRight >= right && fBottom >= bottom;
- }
- /** Returns true if SkIRect contains r.
- Returns false if SkIRect is empty or r is empty.
- SkIRect contains r when SkIRect area completely includes r area.
- @param r SkIRect contained
- @return true if all sides of SkIRect are outside r
- */
- bool contains(const SkIRect& r) const {
- return !r.isEmpty() && !this->isEmpty() && // check for empties
- fLeft <= r.fLeft && fTop <= r.fTop &&
- fRight >= r.fRight && fBottom >= r.fBottom;
- }
- /** Returns true if SkIRect contains r.
- Returns false if SkIRect is empty or r is empty.
- SkIRect contains r when SkIRect area completely includes r area.
- @param r SkRect contained
- @return true if all sides of SkIRect are outside r
- */
- bool contains(const SkRect& r) const;
- /** Constructs SkIRect from (left, top, right, bottom). Does not sort
- construction.
- Returns true if SkIRect contains construction.
- Asserts if SkIRect is empty or construction is empty, and if SK_DEBUG is defined.
- Return is undefined if SkIRect is empty or construction is empty.
- @param left x-axis minimum of constructed SkIRect
- @param top y-axis minimum of constructed SkIRect
- @param right x-axis maximum of constructed SkIRect
- @param bottom y-axis maximum of constructed SkIRect
- @return true if all sides of SkIRect are outside construction
- */
- bool containsNoEmptyCheck(int32_t left, int32_t top,
- int32_t right, int32_t bottom) const {
- SkASSERT(fLeft < fRight && fTop < fBottom);
- SkASSERT(left < right && top < bottom);
- return fLeft <= left && fTop <= top &&
- fRight >= right && fBottom >= bottom;
- }
- /** Returns true if SkIRect contains construction.
- Asserts if SkIRect is empty or construction is empty, and if SK_DEBUG is defined.
- Return is undefined if SkIRect is empty or construction is empty.
- @param r SkIRect contained
- @return true if all sides of SkIRect are outside r
- */
- bool containsNoEmptyCheck(const SkIRect& r) const {
- return containsNoEmptyCheck(r.fLeft, r.fTop, r.fRight, r.fBottom);
- }
- /** Returns true if SkIRect intersects r, and sets SkIRect to intersection.
- Returns false if SkIRect does not intersect r, and leaves SkIRect unchanged.
- Returns false if either r or SkIRect is empty, leaving SkIRect unchanged.
- @param r limit of result
- @return true if r and SkIRect have area in common
- */
- bool intersect(const SkIRect& r) {
- return this->intersect(*this, r);
- }
- /** Returns true if a intersects b, and sets SkIRect to intersection.
- Returns false if a does not intersect b, and leaves SkIRect unchanged.
- Asserts if either a or b is empty, and if SK_DEBUG is defined.
- @param a SkIRect to intersect
- @param b SkIRect to intersect
- @return true if a and b have area in common
- */
- bool SK_WARN_UNUSED_RESULT intersectNoEmptyCheck(const SkIRect& a, const SkIRect& b) {
- SkASSERT(!a.isEmpty64() && !b.isEmpty64());
- SkIRect r = {
- SkMax32(a.fLeft, b.fLeft),
- SkMax32(a.fTop, b.fTop),
- SkMin32(a.fRight, b.fRight),
- SkMin32(a.fBottom, b.fBottom)
- };
- if (r.isEmpty()) {
- return false;
- }
- *this = r;
- return true;
- }
- /** Returns true if a intersects b, and sets SkIRect to intersection.
- Returns false if a does not intersect b, and leaves SkIRect unchanged.
- Returns false if either a or b is empty, leaving SkIRect unchanged.
- @param a SkIRect to intersect
- @param b SkIRect to intersect
- @return true if a and b have area in common
- */
- bool SK_WARN_UNUSED_RESULT intersect(const SkIRect& a, const SkIRect& b) {
- if (a.isEmpty64() || b.isEmpty64()) {
- return false;
- }
- return this->intersectNoEmptyCheck(a, b);
- }
- /** Constructs SkIRect to intersect from (left, top, right, bottom). Does not sort
- construction.
- Returns true if SkIRect intersects construction, and sets SkIRect to intersection.
- Returns false if SkIRect does not intersect construction, and leaves SkIRect unchanged.
- Returns false if either construction or SkIRect is empty, leaving SkIRect unchanged.
- @param left x-axis minimum of constructed SkIRect
- @param top y-axis minimum of constructed SkIRect
- @param right x-axis maximum of constructed SkIRect
- @param bottom y-axis maximum of constructed SkIRect
- @return true if construction and SkIRect have area in common
- */
- bool intersect(int32_t left, int32_t top, int32_t right, int32_t bottom) {
- return this->intersect(*this, {left, top, right, bottom});
- }
- /** Returns true if a intersects b.
- Returns false if either a or b is empty, or do not intersect.
- @param a SkIRect to intersect
- @param b SkIRect to intersect
- @return true if a and b have area in common
- */
- static bool Intersects(const SkIRect& a, const SkIRect& b) {
- SkIRect dummy;
- return dummy.intersect(a, b);
- }
- /** Returns true if a intersects b.
- Asserts if either a or b is empty, and if SK_DEBUG is defined.
- @param a SkIRect to intersect
- @param b SkIRect to intersect
- @return true if a and b have area in common
- */
- static bool IntersectsNoEmptyCheck(const SkIRect& a, const SkIRect& b) {
- SkIRect dummy;
- return dummy.intersectNoEmptyCheck(a, b);
- }
- /** Constructs SkIRect to intersect from (left, top, right, bottom). Does not sort
- construction.
- Sets SkIRect to the union of itself and the construction.
- Has no effect if construction is empty. Otherwise, if SkIRect is empty, sets
- SkIRect to construction.
- @param left x-axis minimum of constructed SkIRect
- @param top y-axis minimum of constructed SkIRect
- @param right x-axis maximum of constructed SkIRect
- @param bottom y-axis maximum of constructed SkIRect
- */
- void join(int32_t left, int32_t top, int32_t right, int32_t bottom);
- /** Sets SkIRect to the union of itself and r.
- Has no effect if r is empty. Otherwise, if SkIRect is empty, sets SkIRect to r.
- @param r expansion SkIRect
- */
- void join(const SkIRect& r) {
- this->join(r.fLeft, r.fTop, r.fRight, r.fBottom);
- }
- /** Swaps fLeft and fRight if fLeft is greater than fRight; and swaps
- fTop and fBottom if fTop is greater than fBottom. Result may be empty,
- and width() and height() will be zero or positive.
- */
- void sort() {
- using std::swap;
- if (fLeft > fRight) {
- swap(fLeft, fRight);
- }
- if (fTop > fBottom) {
- swap(fTop, fBottom);
- }
- }
- /** Returns SkIRect with fLeft and fRight swapped if fLeft is greater than fRight; and
- with fTop and fBottom swapped if fTop is greater than fBottom. Result may be empty;
- and width() and height() will be zero or positive.
- @return sorted SkIRect
- */
- SkIRect makeSorted() const {
- return MakeLTRB(SkMin32(fLeft, fRight), SkMin32(fTop, fBottom),
- SkMax32(fLeft, fRight), SkMax32(fTop, fBottom));
- }
- /** Returns a reference to immutable empty SkIRect, set to (0, 0, 0, 0).
- @return global SkIRect set to all zeroes
- */
- static const SkIRect& SK_WARN_UNUSED_RESULT EmptyIRect() {
- static const SkIRect gEmpty = { 0, 0, 0, 0 };
- return gEmpty;
- }
- };
- /** \struct SkRect
- SkRect holds four SkScalar coordinates describing the upper and
- lower bounds of a rectangle. SkRect may be created from outer bounds or
- from position, width, and height. SkRect describes an area; if its right
- is less than or equal to its left, or if its bottom is less than or equal to
- its top, it is considered empty.
- */
- struct SK_API SkRect {
- SkScalar fLeft; //!< smaller x-axis bounds
- SkScalar fTop; //!< smaller y-axis bounds
- SkScalar fRight; //!< larger x-axis bounds
- SkScalar fBottom; //!< larger y-axis bounds
- /** Returns constructed SkRect set to (0, 0, 0, 0).
- Many other rectangles are empty; if left is equal to or greater than right,
- or if top is equal to or greater than bottom. Setting all members to zero
- is a convenience, but does not designate a special empty rectangle.
- @return bounds (0, 0, 0, 0)
- */
- static constexpr SkRect SK_WARN_UNUSED_RESULT MakeEmpty() {
- return SkRect{0, 0, 0, 0};
- }
- /** Returns constructed SkRect set to SkScalar values (0, 0, w, h). Does not
- validate input; w or h may be negative.
- Passing integer values may generate a compiler warning since SkRect cannot
- represent 32-bit integers exactly. Use SkIRect for an exact integer rectangle.
- @param w SkScalar width of constructed SkRect
- @param h SkScalar height of constructed SkRect
- @return bounds (0, 0, w, h)
- */
- static constexpr SkRect SK_WARN_UNUSED_RESULT MakeWH(SkScalar w, SkScalar h) {
- return SkRect{0, 0, w, h};
- }
- /** Returns constructed SkRect set to integer values (0, 0, w, h). Does not validate
- input; w or h may be negative.
- Use to avoid a compiler warning that input may lose precision when stored.
- Use SkIRect for an exact integer rectangle.
- @param w integer width of constructed SkRect
- @param h integer height of constructed SkRect
- @return bounds (0, 0, w, h)
- */
- static SkRect SK_WARN_UNUSED_RESULT MakeIWH(int w, int h) {
- SkRect r;
- r.set(0, 0, SkIntToScalar(w), SkIntToScalar(h));
- return r;
- }
- /** Returns constructed SkRect set to (0, 0, size.width(), size.height()). Does not
- validate input; size.width() or size.height() may be negative.
- @param size SkScalar values for SkRect width and height
- @return bounds (0, 0, size.width(), size.height())
- */
- static constexpr SkRect SK_WARN_UNUSED_RESULT MakeSize(const SkSize& size) {
- return SkRect{0, 0, size.fWidth, size.fHeight};
- }
- /** Returns constructed SkRect set to (l, t, r, b). Does not sort input; SkRect may
- result in fLeft greater than fRight, or fTop greater than fBottom.
- @param l SkScalar stored in fLeft
- @param t SkScalar stored in fTop
- @param r SkScalar stored in fRight
- @param b SkScalar stored in fBottom
- @return bounds (l, t, r, b)
- */
- static constexpr SkRect SK_WARN_UNUSED_RESULT MakeLTRB(SkScalar l, SkScalar t, SkScalar r,
- SkScalar b) {
- return SkRect {l, t, r, b};
- }
- /** Returns constructed SkRect set to (x, y, x + w, y + h).
- Does not validate input; w or h may be negative.
- @param x stored in fLeft
- @param y stored in fTop
- @param w added to x and stored in fRight
- @param h added to y and stored in fBottom
- @return bounds at (x, y) with width w and height h
- */
- static constexpr SkRect SK_WARN_UNUSED_RESULT MakeXYWH(SkScalar x, SkScalar y, SkScalar w,
- SkScalar h) {
- return SkRect {x, y, x + w, y + h};
- }
- /** Returns constructed SkIRect set to (0, 0, size.width(), size.height()).
- Does not validate input; size.width() or size.height() may be negative.
- @param size integer values for SkRect width and height
- @return bounds (0, 0, size.width(), size.height())
- */
- static SkRect Make(const SkISize& size) {
- return MakeIWH(size.width(), size.height());
- }
- /** Returns constructed SkIRect set to irect, promoting integers to scalar.
- Does not validate input; fLeft may be greater than fRight, fTop may be greater
- than fBottom.
- @param irect integer unsorted bounds
- @return irect members converted to SkScalar
- */
- static SkRect SK_WARN_UNUSED_RESULT Make(const SkIRect& irect) {
- SkRect r;
- r.set(SkIntToScalar(irect.fLeft),
- SkIntToScalar(irect.fTop),
- SkIntToScalar(irect.fRight),
- SkIntToScalar(irect.fBottom));
- return r;
- }
- /** Returns true if fLeft is equal to or greater than fRight, or if fTop is equal
- to or greater than fBottom. Call sort() to reverse rectangles with negative
- width() or height().
- @return true if width() or height() are zero or negative
- */
- bool isEmpty() const {
- // We write it as the NOT of a non-empty rect, so we will return true if any values
- // are NaN.
- return !(fLeft < fRight && fTop < fBottom);
- }
- /** Returns true if fLeft is equal to or less than fRight, or if fTop is equal
- to or less than fBottom. Call sort() to reverse rectangles with negative
- width() or height().
- @return true if width() or height() are zero or positive
- */
- bool isSorted() const { return fLeft <= fRight && fTop <= fBottom; }
- /** Returns true if all values in the rectangle are finite: SK_ScalarMin or larger,
- and SK_ScalarMax or smaller.
- @return true if no member is infinite or NaN
- */
- bool isFinite() const {
- float accum = 0;
- accum *= fLeft;
- accum *= fTop;
- accum *= fRight;
- accum *= fBottom;
- // accum is either NaN or it is finite (zero).
- SkASSERT(0 == accum || SkScalarIsNaN(accum));
- // value==value will be true iff value is not NaN
- // TODO: is it faster to say !accum or accum==accum?
- return !SkScalarIsNaN(accum);
- }
- /** Returns left edge of SkRect, if sorted. Call isSorted() to see if SkRect is valid.
- Call sort() to reverse fLeft and fRight if needed.
- @return fLeft
- */
- SkScalar x() const { return fLeft; }
- /** Returns top edge of SkRect, if sorted. Call isEmpty() to see if SkRect may be invalid,
- and sort() to reverse fTop and fBottom if needed.
- @return fTop
- */
- SkScalar y() const { return fTop; }
- /** Returns left edge of SkRect, if sorted. Call isSorted() to see if SkRect is valid.
- Call sort() to reverse fLeft and fRight if needed.
- @return fLeft
- */
- SkScalar left() const { return fLeft; }
- /** Returns top edge of SkRect, if sorted. Call isEmpty() to see if SkRect may be invalid,
- and sort() to reverse fTop and fBottom if needed.
- @return fTop
- */
- SkScalar top() const { return fTop; }
- /** Returns right edge of SkRect, if sorted. Call isSorted() to see if SkRect is valid.
- Call sort() to reverse fLeft and fRight if needed.
- @return fRight
- */
- SkScalar right() const { return fRight; }
- /** Returns bottom edge of SkRect, if sorted. Call isEmpty() to see if SkRect may be invalid,
- and sort() to reverse fTop and fBottom if needed.
- @return fBottom
- */
- SkScalar bottom() const { return fBottom; }
- /** Returns span on the x-axis. This does not check if SkRect is sorted, or if
- result fits in 32-bit float; result may be negative or infinity.
- @return fRight minus fLeft
- */
- SkScalar width() const { return fRight - fLeft; }
- /** Returns span on the y-axis. This does not check if SkRect is sorted, or if
- result fits in 32-bit float; result may be negative or infinity.
- @return fBottom minus fTop
- */
- SkScalar height() const { return fBottom - fTop; }
- /** Returns average of left edge and right edge. Result does not change if SkRect
- is sorted. Result may overflow to infinity if SkRect is far from the origin.
- @return midpoint on x-axis
- */
- SkScalar centerX() const {
- // don't use SkScalarHalf(fLeft + fBottom) as that might overflow before the 0.5
- return SkScalarHalf(fLeft) + SkScalarHalf(fRight);
- }
- /** Returns average of top edge and bottom edge. Result does not change if SkRect
- is sorted.
- @return midpoint on y-axis
- */
- SkScalar centerY() const {
- // don't use SkScalarHalf(fTop + fBottom) as that might overflow before the 0.5
- return SkScalarHalf(fTop) + SkScalarHalf(fBottom);
- }
- /** Returns true if all members in a: fLeft, fTop, fRight, and fBottom; are
- equal to the corresponding members in b.
- a and b are not equal if either contain NaN. a and b are equal if members
- contain zeroes with different signs.
- @param a SkRect to compare
- @param b SkRect to compare
- @return true if members are equal
- */
- friend bool operator==(const SkRect& a, const SkRect& b) {
- return SkScalarsEqual((const SkScalar*)&a, (const SkScalar*)&b, 4);
- }
- /** Returns true if any in a: fLeft, fTop, fRight, and fBottom; does not
- equal the corresponding members in b.
- a and b are not equal if either contain NaN. a and b are equal if members
- contain zeroes with different signs.
- @param a SkRect to compare
- @param b SkRect to compare
- @return true if members are not equal
- */
- friend bool operator!=(const SkRect& a, const SkRect& b) {
- return !SkScalarsEqual((const SkScalar*)&a, (const SkScalar*)&b, 4);
- }
- /** Returns four points in quad that enclose SkRect ordered as: top-left, top-right,
- bottom-right, bottom-left.
- TODO: Consider adding parameter to control whether quad is clockwise or counterclockwise.
- @param quad storage for corners of SkRect
- */
- void toQuad(SkPoint quad[4]) const;
- /** Sets SkRect to (0, 0, 0, 0).
- Many other rectangles are empty; if left is equal to or greater than right,
- or if top is equal to or greater than bottom. Setting all members to zero
- is a convenience, but does not designate a special empty rectangle.
- */
- void setEmpty() { *this = MakeEmpty(); }
- /** Sets SkRect to src, promoting src members from integer to scalar.
- Very large values in src may lose precision.
- @param src integer SkRect
- */
- void set(const SkIRect& src) {
- fLeft = SkIntToScalar(src.fLeft);
- fTop = SkIntToScalar(src.fTop);
- fRight = SkIntToScalar(src.fRight);
- fBottom = SkIntToScalar(src.fBottom);
- }
- /** Sets SkRect to (left, top, right, bottom).
- left and right are not sorted; left is not necessarily less than right.
- top and bottom are not sorted; top is not necessarily less than bottom.
- @param left stored in fLeft
- @param top stored in fTop
- @param right stored in fRight
- @param bottom stored in fBottom
- */
- void set(SkScalar left, SkScalar top, SkScalar right, SkScalar bottom) {
- fLeft = left;
- fTop = top;
- fRight = right;
- fBottom = bottom;
- }
- /** Sets SkRect to (left, top, right, bottom).
- left and right are not sorted; left is not necessarily less than right.
- top and bottom are not sorted; top is not necessarily less than bottom.
- @param left stored in fLeft
- @param top stored in fTop
- @param right stored in fRight
- @param bottom stored in fBottom
- */
- void setLTRB(SkScalar left, SkScalar top, SkScalar right, SkScalar bottom) {
- this->set(left, top, right, bottom);
- }
- /** Sets SkRect to (left, top, right, bottom).
- All parameters are promoted from integer to scalar.
- left and right are not sorted; left is not necessarily less than right.
- top and bottom are not sorted; top is not necessarily less than bottom.
- @param left promoted to SkScalar and stored in fLeft
- @param top promoted to SkScalar and stored in fTop
- @param right promoted to SkScalar and stored in fRight
- @param bottom promoted to SkScalar and stored in fBottom
- */
- void iset(int left, int top, int right, int bottom) {
- fLeft = SkIntToScalar(left);
- fTop = SkIntToScalar(top);
- fRight = SkIntToScalar(right);
- fBottom = SkIntToScalar(bottom);
- }
- /** Sets SkRect to (0, 0, width, height).
- width and height may be zero or negative. width and height are promoted from
- integer to SkScalar, large values may lose precision.
- @param width promoted to SkScalar and stored in fRight
- @param height promoted to SkScalar and stored in fBottom
- */
- void isetWH(int width, int height) {
- fLeft = fTop = 0;
- fRight = SkIntToScalar(width);
- fBottom = SkIntToScalar(height);
- }
- /** Sets to bounds of SkPoint array with count entries. If count is zero or smaller,
- or if SkPoint array contains an infinity or NaN, sets SkRect to (0, 0, 0, 0).
- Result is either empty or sorted: fLeft is less than or equal to fRight, and
- fTop is less than or equal to fBottom.
- @param pts SkPoint array
- @param count entries in array
- */
- void set(const SkPoint pts[], int count) {
- // set() had been checking for non-finite values, so keep that behavior
- // for now. Now that we have setBoundsCheck(), we may decide to make
- // set() be simpler/faster, and not check for those.
- (void)this->setBoundsCheck(pts, count);
- }
- /** Sets to bounds of SkPoint array with count entries. If count is zero or smaller,
- or if SkPoint array contains an infinity or NaN, sets to (0, 0, 0, 0).
- Result is either empty or sorted: fLeft is less than or equal to fRight, and
- fTop is less than or equal to fBottom.
- @param pts SkPoint array
- @param count entries in array
- */
- void setBounds(const SkPoint pts[], int count) {
- (void)this->setBoundsCheck(pts, count);
- }
- /** Sets to bounds of SkPoint array with count entries. Returns false if count is
- zero or smaller, or if SkPoint array contains an infinity or NaN; in these cases
- sets SkRect to (0, 0, 0, 0).
- Result is either empty or sorted: fLeft is less than or equal to fRight, and
- fTop is less than or equal to fBottom.
- @param pts SkPoint array
- @param count entries in array
- @return true if all SkPoint values are finite
- */
- bool setBoundsCheck(const SkPoint pts[], int count);
- /** Sets to bounds of SkPoint pts array with count entries. If any SkPoint in pts
- contains infinity or NaN, all SkRect dimensions are set to NaN.
- @param pts SkPoint array
- @param count entries in array
- */
- void setBoundsNoCheck(const SkPoint pts[], int count);
- /** Sets bounds to the smallest SkRect enclosing SkPoint p0 and p1. The result is
- sorted and may be empty. Does not check to see if values are finite.
- @param p0 corner to include
- @param p1 corner to include
- */
- void set(const SkPoint& p0, const SkPoint& p1) {
- fLeft = SkMinScalar(p0.fX, p1.fX);
- fRight = SkMaxScalar(p0.fX, p1.fX);
- fTop = SkMinScalar(p0.fY, p1.fY);
- fBottom = SkMaxScalar(p0.fY, p1.fY);
- }
- /** Sets SkRect to (x, y, x + width, y + height).
- Does not validate input; width or height may be negative.
- @param x stored in fLeft
- @param y stored in fTop
- @param width added to x and stored in fRight
- @param height added to y and stored in fBottom
- */
- void setXYWH(SkScalar x, SkScalar y, SkScalar width, SkScalar height) {
- fLeft = x;
- fTop = y;
- fRight = x + width;
- fBottom = y + height;
- }
- /** Sets SkRect to (0, 0, width, height). Does not validate input;
- width or height may be negative.
- @param width stored in fRight
- @param height stored in fBottom
- */
- void setWH(SkScalar width, SkScalar height) {
- fLeft = 0;
- fTop = 0;
- fRight = width;
- fBottom = height;
- }
- /** Returns SkRect offset by (dx, dy).
- If dx is negative, SkRect returned is moved to the left.
- If dx is positive, SkRect returned is moved to the right.
- If dy is negative, SkRect returned is moved upward.
- If dy is positive, SkRect returned is moved downward.
- @param dx added to fLeft and fRight
- @param dy added to fTop and fBottom
- @return SkRect offset on axes, with original width and height
- */
- SkRect makeOffset(SkScalar dx, SkScalar dy) const {
- return MakeLTRB(fLeft + dx, fTop + dy, fRight + dx, fBottom + dy);
- }
- /** Returns SkRect, inset by (dx, dy).
- If dx is negative, SkRect returned is wider.
- If dx is positive, SkRect returned is narrower.
- If dy is negative, SkRect returned is taller.
- If dy is positive, SkRect returned is shorter.
- @param dx added to fLeft and subtracted from fRight
- @param dy added to fTop and subtracted from fBottom
- @return SkRect inset symmetrically left and right, top and bottom
- */
- SkRect makeInset(SkScalar dx, SkScalar dy) const {
- return MakeLTRB(fLeft + dx, fTop + dy, fRight - dx, fBottom - dy);
- }
- /** Returns SkRect, outset by (dx, dy).
- If dx is negative, SkRect returned is narrower.
- If dx is positive, SkRect returned is wider.
- If dy is negative, SkRect returned is shorter.
- If dy is positive, SkRect returned is taller.
- @param dx subtracted to fLeft and added from fRight
- @param dy subtracted to fTop and added from fBottom
- @return SkRect outset symmetrically left and right, top and bottom
- */
- SkRect makeOutset(SkScalar dx, SkScalar dy) const {
- return MakeLTRB(fLeft - dx, fTop - dy, fRight + dx, fBottom + dy);
- }
- /** Offsets SkRect by adding dx to fLeft, fRight; and by adding dy to fTop, fBottom.
- If dx is negative, moves SkRect to the left.
- If dx is positive, moves SkRect to the right.
- If dy is negative, moves SkRect upward.
- If dy is positive, moves SkRect downward.
- @param dx offset added to fLeft and fRight
- @param dy offset added to fTop and fBottom
- */
- void offset(SkScalar dx, SkScalar dy) {
- fLeft += dx;
- fTop += dy;
- fRight += dx;
- fBottom += dy;
- }
- /** Offsets SkRect by adding delta.fX to fLeft, fRight; and by adding delta.fY to
- fTop, fBottom.
- If delta.fX is negative, moves SkRect to the left.
- If delta.fX is positive, moves SkRect to the right.
- If delta.fY is negative, moves SkRect upward.
- If delta.fY is positive, moves SkRect downward.
- @param delta added to SkRect
- */
- void offset(const SkPoint& delta) {
- this->offset(delta.fX, delta.fY);
- }
- /** Offsets SkRect so that fLeft equals newX, and fTop equals newY. width and height
- are unchanged.
- @param newX stored in fLeft, preserving width()
- @param newY stored in fTop, preserving height()
- */
- void offsetTo(SkScalar newX, SkScalar newY) {
- fRight += newX - fLeft;
- fBottom += newY - fTop;
- fLeft = newX;
- fTop = newY;
- }
- /** Insets SkRect by (dx, dy).
- If dx is positive, makes SkRect narrower.
- If dx is negative, makes SkRect wider.
- If dy is positive, makes SkRect shorter.
- If dy is negative, makes SkRect taller.
- @param dx added to fLeft and subtracted from fRight
- @param dy added to fTop and subtracted from fBottom
- */
- void inset(SkScalar dx, SkScalar dy) {
- fLeft += dx;
- fTop += dy;
- fRight -= dx;
- fBottom -= dy;
- }
- /** Outsets SkRect by (dx, dy).
- If dx is positive, makes SkRect wider.
- If dx is negative, makes SkRect narrower.
- If dy is positive, makes SkRect taller.
- If dy is negative, makes SkRect shorter.
- @param dx subtracted to fLeft and added from fRight
- @param dy subtracted to fTop and added from fBottom
- */
- void outset(SkScalar dx, SkScalar dy) { this->inset(-dx, -dy); }
- /** Returns true if SkRect intersects r, and sets SkRect to intersection.
- Returns false if SkRect does not intersect r, and leaves SkRect unchanged.
- Returns false if either r or SkRect is empty, leaving SkRect unchanged.
- @param r limit of result
- @return true if r and SkRect have area in common
- */
- bool intersect(const SkRect& r);
- /** Constructs SkRect to intersect from (left, top, right, bottom). Does not sort
- construction.
- Returns true if SkRect intersects construction, and sets SkRect to intersection.
- Returns false if SkRect does not intersect construction, and leaves SkRect unchanged.
- Returns false if either construction or SkRect is empty, leaving SkRect unchanged.
- @param left x-axis minimum of constructed SkRect
- @param top y-axis minimum of constructed SkRect
- @param right x-axis maximum of constructed SkRect
- @param bottom y-axis maximum of constructed SkRect
- @return true if construction and SkRect have area in common
- */
- bool intersect(SkScalar left, SkScalar top, SkScalar right, SkScalar bottom);
- /** Returns true if a intersects b, and sets SkRect to intersection.
- Returns false if a does not intersect b, and leaves SkRect unchanged.
- Returns false if either a or b is empty, leaving SkRect unchanged.
- @param a SkRect to intersect
- @param b SkRect to intersect
- @return true if a and b have area in common
- */
- bool SK_WARN_UNUSED_RESULT intersect(const SkRect& a, const SkRect& b);
- private:
- static bool Intersects(SkScalar al, SkScalar at, SkScalar ar, SkScalar ab,
- SkScalar bl, SkScalar bt, SkScalar br, SkScalar bb) {
- SkScalar L = SkMaxScalar(al, bl);
- SkScalar R = SkMinScalar(ar, br);
- SkScalar T = SkMaxScalar(at, bt);
- SkScalar B = SkMinScalar(ab, bb);
- return L < R && T < B;
- }
- public:
- /** Constructs SkRect to intersect from (left, top, right, bottom). Does not sort
- construction.
- Returns true if SkRect intersects construction.
- Returns false if either construction or SkRect is empty, or do not intersect.
- @param left x-axis minimum of constructed SkRect
- @param top y-axis minimum of constructed SkRect
- @param right x-axis maximum of constructed SkRect
- @param bottom y-axis maximum of constructed SkRect
- @return true if construction and SkRect have area in common
- */
- bool intersects(SkScalar left, SkScalar top, SkScalar right, SkScalar bottom) const {
- return Intersects(fLeft, fTop, fRight, fBottom, left, top, right, bottom);
- }
- /** Returns true if SkRect intersects r.
- Returns false if either r or SkRect is empty, or do not intersect.
- @param r SkRect to intersect
- @return true if r and SkRect have area in common
- */
- bool intersects(const SkRect& r) const {
- return Intersects(fLeft, fTop, fRight, fBottom,
- r.fLeft, r.fTop, r.fRight, r.fBottom);
- }
- /** Returns true if a intersects b.
- Returns false if either a or b is empty, or do not intersect.
- @param a SkRect to intersect
- @param b SkRect to intersect
- @return true if a and b have area in common
- */
- static bool Intersects(const SkRect& a, const SkRect& b) {
- return Intersects(a.fLeft, a.fTop, a.fRight, a.fBottom,
- b.fLeft, b.fTop, b.fRight, b.fBottom);
- }
- /** Constructs SkRect to intersect from (left, top, right, bottom). Does not sort
- construction.
- Sets SkRect to the union of itself and the construction.
- Has no effect if construction is empty. Otherwise, if SkRect is empty, sets
- SkRect to construction.
- @param left x-axis minimum of constructed SkRect
- @param top y-axis minimum of constructed SkRect
- @param right x-axis maximum of constructed SkRect
- @param bottom y-axis maximum of constructed SkRect
- */
- void join(SkScalar left, SkScalar top, SkScalar right, SkScalar bottom);
- /** Sets SkRect to the union of itself and r.
- Has no effect if r is empty. Otherwise, if SkRect is empty, sets
- SkRect to r.
- @param r expansion SkRect
- */
- void join(const SkRect& r) {
- this->join(r.fLeft, r.fTop, r.fRight, r.fBottom);
- }
- /** Sets SkRect to the union of itself and r.
- Asserts if r is empty and SK_DEBUG is defined.
- If SkRect is empty, sets SkRect to r.
- May produce incorrect results if r is empty.
- @param r expansion SkRect
- */
- void joinNonEmptyArg(const SkRect& r) {
- SkASSERT(!r.isEmpty());
- // if we are empty, just assign
- if (fLeft >= fRight || fTop >= fBottom) {
- *this = r;
- } else {
- this->joinPossiblyEmptyRect(r);
- }
- }
- /** Sets SkRect to the union of itself and the construction.
- May produce incorrect results if SkRect or r is empty.
- @param r expansion SkRect
- */
- void joinPossiblyEmptyRect(const SkRect& r) {
- fLeft = SkMinScalar(fLeft, r.left());
- fTop = SkMinScalar(fTop, r.top());
- fRight = SkMaxScalar(fRight, r.right());
- fBottom = SkMaxScalar(fBottom, r.bottom());
- }
- /** Returns true if: fLeft <= x < fRight && fTop <= y < fBottom.
- Returns false if SkRect is empty.
- @param x test SkPoint x-coordinate
- @param y test SkPoint y-coordinate
- @return true if (x, y) is inside SkRect
- */
- bool contains(SkScalar x, SkScalar y) const {
- return x >= fLeft && x < fRight && y >= fTop && y < fBottom;
- }
- /** Returns true if SkRect contains r.
- Returns false if SkRect is empty or r is empty.
- SkRect contains r when SkRect area completely includes r area.
- @param r SkRect contained
- @return true if all sides of SkRect are outside r
- */
- bool contains(const SkRect& r) const {
- // todo: can we eliminate the this->isEmpty check?
- return !r.isEmpty() && !this->isEmpty() &&
- fLeft <= r.fLeft && fTop <= r.fTop &&
- fRight >= r.fRight && fBottom >= r.fBottom;
- }
- /** Returns true if SkRect contains r.
- Returns false if SkRect is empty or r is empty.
- SkRect contains r when SkRect area completely includes r area.
- @param r SkIRect contained
- @return true if all sides of SkRect are outside r
- */
- bool contains(const SkIRect& r) const {
- // todo: can we eliminate the this->isEmpty check?
- return !r.isEmpty() && !this->isEmpty() &&
- fLeft <= SkIntToScalar(r.fLeft) && fTop <= SkIntToScalar(r.fTop) &&
- fRight >= SkIntToScalar(r.fRight) && fBottom >= SkIntToScalar(r.fBottom);
- }
- /** Sets SkIRect by adding 0.5 and discarding the fractional portion of SkRect
- members, using (SkScalarRoundToInt(fLeft), SkScalarRoundToInt(fTop),
- SkScalarRoundToInt(fRight), SkScalarRoundToInt(fBottom)).
- @param dst storage for SkIRect
- */
- void round(SkIRect* dst) const {
- SkASSERT(dst);
- dst->set(SkScalarRoundToInt(fLeft), SkScalarRoundToInt(fTop),
- SkScalarRoundToInt(fRight), SkScalarRoundToInt(fBottom));
- }
- /** Sets SkIRect by discarding the fractional portion of fLeft and fTop; and rounding
- up fRight and fBottom, using
- (SkScalarFloorToInt(fLeft), SkScalarFloorToInt(fTop),
- SkScalarCeilToInt(fRight), SkScalarCeilToInt(fBottom)).
- @param dst storage for SkIRect
- */
- void roundOut(SkIRect* dst) const {
- SkASSERT(dst);
- dst->set(SkScalarFloorToInt(fLeft), SkScalarFloorToInt(fTop),
- SkScalarCeilToInt(fRight), SkScalarCeilToInt(fBottom));
- }
- /** Sets SkRect by discarding the fractional portion of fLeft and fTop; and rounding
- up fRight and fBottom, using
- (SkScalarFloorToInt(fLeft), SkScalarFloorToInt(fTop),
- SkScalarCeilToInt(fRight), SkScalarCeilToInt(fBottom)).
- @param dst storage for SkRect
- */
- void roundOut(SkRect* dst) const {
- dst->set(SkScalarFloorToScalar(fLeft),
- SkScalarFloorToScalar(fTop),
- SkScalarCeilToScalar(fRight),
- SkScalarCeilToScalar(fBottom));
- }
- /** Sets SkRect by rounding up fLeft and fTop; and discarding the fractional portion
- of fRight and fBottom, using
- (SkScalarCeilToInt(fLeft), SkScalarCeilToInt(fTop),
- SkScalarFloorToInt(fRight), SkScalarFloorToInt(fBottom)).
- @param dst storage for SkIRect
- */
- void roundIn(SkIRect* dst) const {
- SkASSERT(dst);
- dst->set(SkScalarCeilToInt(fLeft), SkScalarCeilToInt(fTop),
- SkScalarFloorToInt(fRight), SkScalarFloorToInt(fBottom));
- }
- /** Returns SkIRect by adding 0.5 and discarding the fractional portion of SkRect
- members, using (SkScalarRoundToInt(fLeft), SkScalarRoundToInt(fTop),
- SkScalarRoundToInt(fRight), SkScalarRoundToInt(fBottom)).
- @return rounded SkIRect
- */
- SkIRect round() const {
- SkIRect ir;
- this->round(&ir);
- return ir;
- }
- /** Sets SkIRect by discarding the fractional portion of fLeft and fTop; and rounding
- up fRight and fBottom, using
- (SkScalarFloorToInt(fLeft), SkScalarFloorToInt(fTop),
- SkScalarCeilToInt(fRight), SkScalarCeilToInt(fBottom)).
- @return rounded SkIRect
- */
- SkIRect roundOut() const {
- SkIRect ir;
- this->roundOut(&ir);
- return ir;
- }
- /** Swaps fLeft and fRight if fLeft is greater than fRight; and swaps
- fTop and fBottom if fTop is greater than fBottom. Result may be empty;
- and width() and height() will be zero or positive.
- */
- void sort() {
- using std::swap;
- if (fLeft > fRight) {
- swap(fLeft, fRight);
- }
- if (fTop > fBottom) {
- swap(fTop, fBottom);
- }
- }
- /** Returns SkRect with fLeft and fRight swapped if fLeft is greater than fRight; and
- with fTop and fBottom swapped if fTop is greater than fBottom. Result may be empty;
- and width() and height() will be zero or positive.
- @return sorted SkRect
- */
- SkRect makeSorted() const {
- return MakeLTRB(SkMinScalar(fLeft, fRight), SkMinScalar(fTop, fBottom),
- SkMaxScalar(fLeft, fRight), SkMaxScalar(fTop, fBottom));
- }
- /** Returns pointer to first scalar in SkRect, to treat it as an array with four
- entries.
- @return pointer to fLeft
- */
- const SkScalar* asScalars() const { return &fLeft; }
- /** Writes text representation of SkRect to standard output. Set asHex to true to
- generate exact binary representations of floating point numbers.
- @param asHex true if SkScalar values are written as hexadecimal
- */
- void dump(bool asHex) const;
- /** Writes text representation of SkRect to standard output. The representation may be
- directly compiled as C++ code. Floating point values are written
- with limited precision; it may not be possible to reconstruct original SkRect
- from output.
- */
- void dump() const { this->dump(false); }
- /** Writes text representation of SkRect to standard output. The representation may be
- directly compiled as C++ code. Floating point values are written
- in hexadecimal to preserve their exact bit pattern. The output reconstructs the
- original SkRect.
- Use instead of dump() when submitting
- */
- void dumpHex() const { this->dump(true); }
- };
- inline bool SkIRect::contains(const SkRect& r) const {
- return !r.isEmpty() && !this->isEmpty() && // check for empties
- (SkScalar)fLeft <= r.fLeft && (SkScalar)fTop <= r.fTop &&
- (SkScalar)fRight >= r.fRight && (SkScalar)fBottom >= r.fBottom;
- }
- #endif
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