1c5906f562
Bug: skia: Change-Id: I1c4f879a455048652abb619814841cd687a0474a Reviewed-on: https://skia-review.googlesource.com/101881 Reviewed-by: Mike Klein <mtklein@google.com> Commit-Queue: Mike Reed <reed@google.com>
1588 lines
58 KiB
C++
1588 lines
58 KiB
C++
/*
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* Copyright 2006 The Android Open Source Project
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#ifndef SkRect_DEFINED
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#define SkRect_DEFINED
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#include "SkPoint.h"
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#include "SkSize.h"
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#include "../private/SkSafe32.h"
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#include "../private/SkTFitsIn.h"
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struct SkRect;
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/** \struct SkIRect
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SkIRect holds four 32 bit integer coordinates describing the upper and
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lower bounds of a rectangle. SkIRect may be created from outer bounds or
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from position, width, and height. SkIRect describes an area; if its right
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is less than or equal to its left, or if its bottom is less than or equal to
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its top, it is considered empty.
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*/
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struct SK_API SkIRect {
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/** May contain any value. The smaller of the horizontal values when sorted.
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When equal to or greater than fRight, SkIRect is empty.
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*/
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int32_t fLeft;
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/** May contain any value. The smaller of the horizontal values when sorted.
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When equal to or greater than fBottom, SkIRect is empty.
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*/
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int32_t fTop;
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/** May contain any value. The larger of the vertical values when sorted.
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When equal to or less than fLeft, SkIRect is empty.
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*/
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int32_t fRight;
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/** May contain any value. The larger of the vertical values when sorted.
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When equal to or less than fTop, SkIRect is empty.
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*/
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int32_t fBottom;
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/** Returns constructed SkIRect set to (0, 0, 0, 0).
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Many other rectangles are empty; if left is equal to or greater than right,
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or if top is equal to or greater than bottom. Setting all members to zero
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is a convenience, but does not designate a special empty rectangle.
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@return bounds (0, 0, 0, 0)
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*/
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static constexpr SkIRect SK_WARN_UNUSED_RESULT MakeEmpty() {
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return SkIRect{0, 0, 0, 0};
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}
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#ifdef SK_SUPPORT_LEGACY_RECTMAKELARGEST
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/** Returns constructed SkIRect setting left and top to most negative value, and
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setting right and bottom to most positive value.
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@return bounds (SK_MinS32, SK_MinS32, SK_MaxS32, SK_MaxS32)
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*/
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static SkIRect SK_WARN_UNUSED_RESULT MakeLargest() {
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return { SK_MinS32, SK_MinS32, SK_MaxS32, SK_MaxS32 };
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}
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#endif
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/** Returns constructed SkIRect set to (0, 0, w, h). Does not validate input; w or h
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may be negative.
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@param w width of constructed SkRect
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@param h height of constructed SkRect
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@return bounds (0, 0, w, h)
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*/
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static constexpr SkIRect SK_WARN_UNUSED_RESULT MakeWH(int32_t w, int32_t h) {
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return SkIRect{0, 0, w, h};
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}
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/** Returns constructed SkIRect set to (0, 0, size.width(), size.height()).
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Does not validate input; size.width() or size.height() may be negative.
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@param size values for SkRect width and height
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@return bounds (0, 0, size.width(), size.height())
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*/
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static constexpr SkIRect SK_WARN_UNUSED_RESULT MakeSize(const SkISize& size) {
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return SkIRect{0, 0, size.fWidth, size.fHeight};
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}
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/** Returns constructed SkIRect set to (l, t, r, b). Does not sort input; SkRect may
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result in fLeft greater than fRight, or fTop greater than fBottom.
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@param l integer stored in fLeft
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@param t integer stored in fTop
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@param r integer stored in fRight
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@param b integer stored in fBottom
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@return bounds (l, t, r, b)
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*/
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static constexpr SkIRect SK_WARN_UNUSED_RESULT MakeLTRB(int32_t l, int32_t t,
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int32_t r, int32_t b) {
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return SkIRect{l, t, r, b};
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}
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/** Returns constructed SkIRect set to: (x, y, x + w, y + h). Does not validate input;
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w or h may be negative.
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@param x stored in fLeft
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@param y stored in fTop
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@param w added to x and stored in fRight
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@param h added to y and stored in fBottom
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@return bounds at (x, y) with width w and height h
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*/
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static constexpr SkIRect SK_WARN_UNUSED_RESULT MakeXYWH(int32_t x, int32_t y,
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int32_t w, int32_t h) {
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return { x, y, Sk32_sat_add(x, w), Sk32_sat_add(y, h) };
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}
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/** Returns left edge of SkIRect, if sorted.
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Call sort() to reverse fLeft and fRight if needed.
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@return fLeft
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*/
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int32_t left() const { return fLeft; }
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/** Returns top edge of SkIRect, if sorted. Call isEmpty() to see if SkIRect may be invalid,
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and sort() to reverse fTop and fBottom if needed.
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@return fTop
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*/
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int32_t top() const { return fTop; }
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/** Returns right edge of SkIRect, if sorted.
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Call sort() to reverse fLeft and fRight if needed.
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@return fRight
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*/
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int32_t right() const { return fRight; }
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/** Returns bottom edge of SkIRect, if sorted. Call isEmpty() to see if SkIRect may be invalid,
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and sort() to reverse fTop and fBottom if needed.
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@return fBottom
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*/
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int32_t bottom() const { return fBottom; }
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/** Returns left edge of SkIRect, if sorted. Call isEmpty() to see if SkIRect may be invalid,
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and sort() to reverse fLeft and fRight if needed.
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@return fLeft
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*/
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int32_t x() const { return fLeft; }
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/** Returns top edge of SkIRect, if sorted. Call isEmpty() to see if SkIRect may be invalid,
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and sort() to reverse fTop and fBottom if needed.
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@return fTop
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*/
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int32_t y() const { return fTop; }
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/** Returns span on the x-axis. This does not check if SkIRect is sorted, or if
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result fits in 32-bit signed integer; result may be negative.
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@return fRight minus fLeft
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*/
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int32_t width() const { return Sk32_can_overflow_sub(fRight, fLeft); }
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/** Returns span on the y-axis. This does not check if SkIRect is sorted, or if
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result fits in 32-bit signed integer; result may be negative.
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@return fBottom minus fTop
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*/
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int32_t height() const { return Sk32_can_overflow_sub(fBottom, fTop); }
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/** Returns spans on the x-axis and y-axis. This does not check if SkIRect is sorted,
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or if result fits in 32-bit signed integer; result may be negative.
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@return SkISize (width, height)
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*/
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SkISize size() const { return SkISize::Make(this->width(), this->height()); }
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/** Returns average of left edge and right edge. Result does not change if SkRect
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is sorted. Result may be incorrect if SkRect is far from the origin.
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Result is rounded down.
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@return midpoint in x
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*/
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int32_t centerX() const { return SkToS32(((int64_t)fRight + fLeft) >> 1); }
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/** Returns average of top edge and bottom edge. Result does not change if SkRect
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is sorted. Result may be incorrect if SkRect is far from the origin.
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Result is rounded down.
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@return midpoint in y
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*/
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int32_t centerY() const { return SkToS32(((int64_t)fBottom + fTop) >> 1); }
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int64_t width64() const { return (int64_t)fRight - (int64_t)fLeft; }
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int64_t height64() const { return (int64_t)fBottom - (int64_t)fTop; }
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/** Returns true if the rectangle's dimensions are non-positive.
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* Unlike isEmpty(), this does not worry about the size of the width or height, which could
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* exceed int32_t but still be logically non-empty.
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*/
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bool isEmpty64() const { return fRight <= fLeft || fBottom <= fTop; }
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/** Returns true if the rectangle's dimensions are non-positive or if either its width or hieght
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* exceeds int32_t.
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*/
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bool isEmpty() const {
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int64_t w = this->width64();
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int64_t h = this->height64();
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if (w <= 0 || h <= 0) {
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return true;
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}
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// Return true if either exceeds int32_t
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return !sk_64_isS32(w | h);
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}
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/** Returns true if all members in a: fLeft, fTop, fRight, and fBottom; are
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identical to corresponding members in b.
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@param a SkIRect to compare
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@param b SkIRect to compare
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@return true if members are equal
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*/
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friend bool operator==(const SkIRect& a, const SkIRect& b) {
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return !memcmp(&a, &b, sizeof(a));
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}
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/** Returns true if any member in a: fLeft, fTop, fRight, and fBottom; is not
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identical to the corresponding member in b.
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@param a SkIRect to compare
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@param b SkIRect to compare
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@return true if members are not equal
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*/
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friend bool operator!=(const SkIRect& a, const SkIRect& b) {
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return !(a == b);
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}
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/** Returns true if all members: fLeft, fTop, fRight, and fBottom; values are
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equal to or larger than -32768 and equal to or smaller than 32767.
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@return true if members fit in 16-bit word
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*/
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bool is16Bit() const {
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return SkTFitsIn<int16_t>(fLeft) && SkTFitsIn<int16_t>(fTop) &&
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SkTFitsIn<int16_t>(fRight) && SkTFitsIn<int16_t>(fBottom);
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}
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/** Sets SkIRect to (0, 0, 0, 0).
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Many other rectangles are empty; if left is equal to or greater than right,
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or if top is equal to or greater than bottom. Setting all members to zero
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is a convenience, but does not designate a special empty rectangle.
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*/
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void setEmpty() { memset(this, 0, sizeof(*this)); }
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/** Sets SkIRect to (left, top, right, bottom).
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left and right are not sorted; left is not necessarily less than right.
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top and bottom are not sorted; top is not necessarily less than bottom.
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@param left assigned to fLeft
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@param top assigned to fTop
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@param right assigned to fRight
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@param bottom assigned to fBottom
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*/
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void set(int32_t left, int32_t top, int32_t right, int32_t bottom) {
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fLeft = left;
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fTop = top;
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fRight = right;
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fBottom = bottom;
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}
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/** Sets SkIRect to (left, top, right, bottom).
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left and right are not sorted; left is not necessarily less than right.
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top and bottom are not sorted; top is not necessarily less than bottom.
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@param left stored in fLeft
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@param top stored in fTop
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@param right stored in fRight
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@param bottom stored in fBottom
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*/
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void setLTRB(int32_t left, int32_t top, int32_t right, int32_t bottom) {
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this->set(left, top, right, bottom);
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}
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/** Sets SkIRect to: (x, y, x + width, y + height). Does not validate input;
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width or height may be negative.
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@param x stored in fLeft
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@param y stored in fTop
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@param width added to x and stored in fRight
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@param height added to y and stored in fBottom
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*/
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void setXYWH(int32_t x, int32_t y, int32_t width, int32_t height) {
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fLeft = x;
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fTop = y;
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fRight = Sk32_sat_add(x, width);
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fBottom = Sk32_sat_add(y, height);
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}
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/** Returns SkIRect offset by (dx, dy).
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If dx is negative, SkIRect returned is moved to the left.
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If dx is positive, SkIRect returned is moved to the right.
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If dy is negative, SkIRect returned is moved upward.
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If dy is positive, SkIRect returned is moved downward.
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@param dx offset added to fLeft and fRight
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@param dy offset added to fTop and fBottom
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@return SkRect offset in x or y, with original width and height
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*/
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SkIRect makeOffset(int32_t dx, int32_t dy) const {
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return {
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Sk32_sat_add(fLeft, dx), Sk32_sat_add(fTop, dy),
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Sk32_sat_add(fRight, dx), Sk32_sat_add(fBottom, dy),
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};
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}
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/** Returns SkIRect, inset by (dx, dy).
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If dx is negative, SkIRect returned is wider.
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If dx is positive, SkIRect returned is narrower.
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If dy is negative, SkIRect returned is taller.
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If dy is positive, SkIRect returned is shorter.
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@param dx offset added to fLeft and subtracted from fRight
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@param dy offset added to fTop and subtracted from fBottom
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@return SkRect inset symmetrically left and right, top and bottom
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*/
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SkIRect makeInset(int32_t dx, int32_t dy) const {
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return {
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Sk32_sat_add(fLeft, dx), Sk32_sat_add(fTop, dy),
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Sk32_sat_sub(fRight, dx), Sk32_sat_sub(fBottom, dy),
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};
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}
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/** Returns SkIRect, outset by (dx, dy).
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If dx is negative, SkIRect returned is narrower.
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If dx is positive, SkIRect returned is wider.
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If dy is negative, SkIRect returned is shorter.
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If dy is positive, SkIRect returned is taller.
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@param dx offset subtracted to fLeft and added from fRight
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@param dy offset subtracted to fTop and added from fBottom
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@return SkRect outset symmetrically left and right, top and bottom
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*/
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SkIRect makeOutset(int32_t dx, int32_t dy) const {
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return {
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Sk32_sat_sub(fLeft, dx), Sk32_sat_sub(fTop, dy),
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Sk32_sat_add(fRight, dx), Sk32_sat_add(fBottom, dy),
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};
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}
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/** Offsets SkIRect by adding dx to fLeft, fRight; and by adding dy to fTop, fBottom.
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If dx is negative, moves SkIRect returned to the left.
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If dx is positive, moves SkIRect returned to the right.
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If dy is negative, moves SkIRect returned upward.
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If dy is positive, moves SkIRect returned downward.
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@param dx offset added to fLeft and fRight
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@param dy offset added to fTop and fBottom
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*/
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void offset(int32_t dx, int32_t dy) {
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fLeft = Sk32_sat_add(fLeft, dx);
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fTop = Sk32_sat_add(fTop, dy);
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fRight = Sk32_sat_add(fRight, dx);
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fBottom = Sk32_sat_add(fBottom, dy);
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}
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/** Offsets SkIRect by adding delta.fX to fLeft, fRight; and by adding delta.fY to
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fTop, fBottom.
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If delta.fX is negative, moves SkIRect returned to the left.
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If delta.fX is positive, moves SkIRect returned to the right.
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If delta.fY is negative, moves SkIRect returned upward.
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If delta.fY is positive, moves SkIRect returned downward.
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@param delta offset added to SkIRect
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*/
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void offset(const SkIPoint& delta) {
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this->offset(delta.fX, delta.fY);
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}
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/** Offsets SkIRect so that fLeft equals newX, and fTop equals newY. width and height
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are unchanged.
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@param newX stored in fLeft, preserving width()
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@param newY stored in fTop, preserving height()
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*/
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void offsetTo(int32_t newX, int32_t newY) {
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fRight = Sk64_pin_to_s32((int64_t)fRight + newX - fLeft);
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fBottom = Sk64_pin_to_s32((int64_t)fBottom + newY - fTop);
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fLeft = newX;
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fTop = newY;
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}
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/** Insets SkIRect by (dx,dy).
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If dx is positive, makes SkIRect narrower.
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If dx is negative, makes SkIRect wider.
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If dy is positive, makes SkIRect shorter.
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If dy is negative, makes SkIRect taller.
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@param dx offset added to fLeft and subtracted from fRight
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@param dy offset added to fTop and subtracted from fBottom
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*/
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void inset(int32_t dx, int32_t dy) {
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fLeft = Sk32_sat_add(fLeft, dx);
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fTop = Sk32_sat_add(fTop, dy);
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fRight = Sk32_sat_sub(fRight, dx);
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fBottom = Sk32_sat_sub(fBottom, dy);
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}
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/** Outsets SkIRect by (dx, dy).
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If dx is positive, makes SkRect wider.
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If dx is negative, makes SkRect narrower.
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If dy is positive, makes SkRect taller.
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If dy is negative, makes SkRect shorter.
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@param dx subtracted to fLeft and added from fRight
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@param dy subtracted to fTop and added from fBottom
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*/
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void outset(int32_t dx, int32_t dy) { this->inset(-dx, -dy); }
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/** Constructs SkIRect (l, t, r, b) and returns true if constructed SkIRect does not
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intersect SkIRect. Does not check to see if construction or SkIRect is empty.
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Is implemented with short circuit logic so that true can be returned after
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a single compare.
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@param l x minimum of constructed SkRect
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@param t y minimum of constructed SkRect
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@param r x maximum of constructed SkRect
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@param b y maximum of constructed SkRect
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@return true if construction and SkIRect have no area in common
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*/
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bool quickReject(int l, int t, int r, int b) const {
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return l >= fRight || fLeft >= r || t >= fBottom || fTop >= b;
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}
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/** Returns true if: fLeft <= x < fRight && fTop <= y < fBottom.
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Returns false if SkRect is empty.
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Considers input to describe constructed SkIRect: (x, y, x + 1, y + 1) and
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returns true if constructed area is completely enclosed by SkIRect area.
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@param x test SkPoint x-coordinate
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@param y test SkPoint y-coordinate
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@return true if (x, y) is inside SkIRect
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*/
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bool contains(int32_t x, int32_t y) const {
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return (unsigned)(x - fLeft) < (unsigned)(fRight - fLeft) &&
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(unsigned)(y - fTop) < (unsigned)(fBottom - fTop);
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}
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/** Constructs SkRect to intersect from (left, top, right, bottom). Does not sort
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construction.
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Returns true if SkRect contains construction.
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Returns false if SkRect is empty or construction is empty.
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@param left x minimum of constructed SkRect
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@param top y minimum of constructed SkRect
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@param right x maximum of constructed SkRect
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@param bottom y maximum of constructed SkRect
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@return true if all sides of SkIRect are outside construction
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*/
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bool contains(int32_t left, int32_t top, int32_t right, int32_t bottom) const {
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return left < right && top < bottom && !this->isEmpty() && // check for empties
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fLeft <= left && fTop <= top &&
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fRight >= right && fBottom >= bottom;
|
|
}
|
|
|
|
/** 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 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 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 SkIRect are outside r
|
|
*/
|
|
bool contains(const SkRect& r) const;
|
|
|
|
/** Constructs SkIRect from (left, top, right, bottom). Does not sort
|
|
construction.
|
|
|
|
Returns true if SkRect contains construction.
|
|
Asserts if SkIRect is empty or construction is empty, and if SK_DEBUG is defined.
|
|
|
|
Return is undefined if SkRect is empty or construction is empty.
|
|
|
|
@param left x minimum of constructed SkRect
|
|
@param top y minimum of constructed SkRect
|
|
@param right x maximum of constructed SkRect
|
|
@param bottom y maximum of constructed SkRect
|
|
@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 SkRect contains construction.
|
|
Asserts if SkIRect is empty or construction is empty, and if SK_DEBUG is defined.
|
|
|
|
Return is undefined if SkRect is empty or construction is empty.
|
|
|
|
@param r SkRect 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 SkRect 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 minimum of constructed SkIRect
|
|
@param top y minimum of constructed SkIRect
|
|
@param right x maximum of constructed SkIRect
|
|
@param bottom y 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 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 minimum of constructed SkRect
|
|
@param top y minimum of constructed SkRect
|
|
@param right x maximum of constructed SkRect
|
|
@param bottom y maximum of constructed SkRect
|
|
*/
|
|
void join(int32_t left, int32_t top, int32_t right, int32_t 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 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() {
|
|
if (fLeft > fRight) {
|
|
SkTSwap<int32_t>(fLeft, fRight);
|
|
}
|
|
if (fTop > fBottom) {
|
|
SkTSwap<int32_t>(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 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 {
|
|
|
|
/** May contain any value, including infinities and NaN. The smaller of the
|
|
horizontal values when sorted. When equal to or greater than fRight, SkRect is empty.
|
|
*/
|
|
SkScalar fLeft;
|
|
|
|
/** May contain any value, including infinities and NaN. The smaller of the
|
|
vertical values when sorted. When equal to or greater than fBottom, SkRect is empty.
|
|
*/
|
|
SkScalar fTop;
|
|
|
|
/** May contain any value, including infinities and NaN. The larger of the
|
|
horizontal values when sorted. When equal to or less than fLeft, SkRect is empty.
|
|
*/
|
|
SkScalar fRight;
|
|
|
|
/** May contain any value, including infinities and NaN. The larger of the
|
|
vertical values when sorted. When equal to or less than fTop, SkRect is empty.
|
|
*/
|
|
SkScalar fBottom;
|
|
|
|
/** 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};
|
|
}
|
|
|
|
#ifdef SK_SUPPORT_LEGACY_RECTMAKELARGEST
|
|
/** Returns constructed SkRect setting left and top to most negative finite value, and
|
|
setting right and bottom to most positive finite value.
|
|
|
|
@return bounds (SK_ScalarMin, SK_ScalarMin, SK_ScalarMax, SK_ScalarMax)
|
|
*/
|
|
static SkRect SK_WARN_UNUSED_RESULT MakeLargest() {
|
|
return { SK_ScalarMin, SK_ScalarMin, SK_ScalarMax, SK_ScalarMax };
|
|
}
|
|
#endif
|
|
|
|
/** 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};
|
|
}
|
|
|
|
/** Deprecated.
|
|
|
|
@param irect integer rect
|
|
@return irect as SkRect
|
|
*/
|
|
SK_ATTR_DEPRECATED("use Make()")
|
|
static SkRect SK_WARN_UNUSED_RESULT MakeFromIRect(const SkIRect& irect) {
|
|
SkRect r;
|
|
r.set(SkIntToScalar(irect.fLeft),
|
|
SkIntToScalar(irect.fTop),
|
|
SkIntToScalar(irect.fRight),
|
|
SkIntToScalar(irect.fBottom));
|
|
return r;
|
|
}
|
|
|
|
/** 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 { 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 SkIRect 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 in x
|
|
*/
|
|
SkScalar centerX() const { return SkScalarHalf(fLeft + fRight); }
|
|
|
|
/** Returns average of top edge and bottom edge. Result does not change if SkRect
|
|
is sorted. Result may overflow to infinity if SkRect is far from the origin.
|
|
|
|
@return midpoint in y
|
|
*/
|
|
SkScalar centerY() const { return SkScalarHalf(fTop + 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 width 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 width 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.
|
|
Consider adding param to control whether quad is CW or CCW.
|
|
|
|
@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 bounds to the smallest SkRect enclosing points 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 in x or y, 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 minimum of constructed SkRect
|
|
@param top y minimum of constructed SkRect
|
|
@param right x maximum of constructed SkRect
|
|
@param bottom y 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 minimum of constructed SkRect
|
|
@param top y minimum of constructed SkRect
|
|
@param right x maximum of constructed SkRect
|
|
@param bottom y 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 minimum of constructed SkRect
|
|
@param top y minimum of constructed SkRect
|
|
@param right x maximum of constructed SkRect
|
|
@param bottom y 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 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() {
|
|
if (fLeft > fRight) {
|
|
SkTSwap<SkScalar>(fLeft, fRight);
|
|
}
|
|
|
|
if (fTop > fBottom) {
|
|
SkTSwap<SkScalar>(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
|