| #Topic IRect |
| #Alias IRect_Reference |
| |
| #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. |
| |
| #Topic Overview |
| |
| #Subtopic Subtopics |
| #ToDo manually add subtopics ## |
| #Table |
| #Legend |
| # topics # description ## |
| #Legend ## |
| #Table ## |
| ## |
| |
| #Subtopic Operators |
| #Table |
| #Legend |
| # description # function ## |
| #Legend ## |
| # bool operator!=(const SkIRect& a, const SkIRect& b) # Returns true if members are unequal. ## |
| # bool operator==(const SkIRect& a, const SkIRect& b) # Returns true if members are equal. ## |
| #Table ## |
| #Subtopic ## |
| |
| #Subtopic Member_Functions |
| #Table |
| #Legend |
| # description # function ## |
| #Legend ## |
| # EmptyIRect # Returns immutable bounds of (0, 0, 0, 0). ## |
| # Intersects # Returns true if areas overlap. ## |
| # IntersectsNoEmptyCheck # Returns true if areas overlap. Skips empty check. ## |
| # MakeEmpty # Returns bounds of (0, 0, 0, 0). ## |
| # MakeLTRB # Constructs from int left, top, right, bottom. ## |
| # MakeLargest # Constructs from (SK_MinS32, SK_MinS32, SK_MaxS32, SK_MaxS32). ## |
| # MakeSize # Constructs from ISize returning (0, 0, width, height). ## |
| # MakeWH # Constructs from int input returning (0, 0, width, height). ## |
| # MakeXYWH # Constructs from int input returning (x, y, width, height). ## |
| # bottom() # Returns larger bounds in y, if sorted. ## |
| # centerX # Returns midpoint in x. ## |
| # centerY # Returns midpoint in y. ## |
| # contains() # Returns true if points are equal or inside. ## |
| # containsNoEmptyCheck # Returns true if points are equal or inside. Skips empty check. ## |
| # height() # Returns span in y. ## |
| # inset() # Moves the sides symmetrically about the center. ## |
| # intersect # Sets to shared area; returns true if not empty. ## |
| # intersectNoEmptyCheck # Sets to shared area; returns true if not empty. Skips empty check. ## |
| # is16Bit # Returns true if members fit in 16-bit word. ## |
| # isEmpty # Returns true if width or height are zero or negative. ## |
| # isLargest # Returns true if equal to (SK_MinS32, SK_MinS32, SK_MaxS32, SK_MaxS32). ## |
| # join() # Sets to union of bounds. ## |
| # left() # Returns smaller bounds in x, if sorted. ## |
| # makeInset # Constructs from sides moved symmetrically about the center. ## |
| # makeOffset # Constructs from translated sides. ## |
| # makeOutset # Constructs from sides moved symmetrically about the center. ## |
| # makeSorted # Constructs, ordering sides from smaller to larger. ## |
| # offset() # Translates sides without changing width and height. ## |
| # offsetTo # Translates to (x, y) without changing width and height. ## |
| # outset() # Moves the sides symmetrically about the center. ## |
| # quickReject # Returns true if rectangles do not intersect. ## |
| # right() # Returns larger bounds in x, if sorted. ## |
| # set() # Sets to (left, top, right, bottom). ## |
| # setEmpty # Sets to (0, 0, 0, 0). ## |
| # setLTRB # Sets to SkScalar input (left, top, right, bottom). ## |
| # setLargest # Sets to (SK_MinS32, SK_MinS32, SK_MaxS32, SK_MaxS32). ## |
| # setLargestInverted # Sets to (SK_MaxS32, SK_MaxS32, SK_MinS32, SK_MinS32). ## |
| # setXYWH # Sets to (x, y, width, height). ## |
| # size() # Returns ISize (width, height). ## |
| # sort() # Orders sides from smaller to larger. ## |
| # top() # Returns smaller bounds in y, if sorted. ## |
| # width() # Returns span in x. ## |
| # x() # Returns bounds left. ## |
| # y() # Returns bounds top. ## |
| #Table ## |
| #Subtopic ## |
| |
| #Topic ## |
| |
| #Member int32_t fLeft |
| May contain any value. The smaller of the horizontal values when sorted. |
| When equal to or greater than fRight, IRect is empty. |
| ## |
| |
| #Member int32_t fTop |
| May contain any value. The smaller of the horizontal values when sorted. |
| When equal to or greater than fBottom, IRect is empty. |
| ## |
| |
| #Member int32_t fRight |
| May contain any value. The larger of the vertical values when sorted. |
| When equal to or less than fLeft, IRect is empty. |
| ## |
| |
| #Member int32_t fBottom |
| May contain any value. The larger of the vertical values when sorted. |
| When equal to or less than fTop, IRect is empty. |
| ## |
| |
| # ------------------------------------------------------------------------------ |
| |
| #Method static constexpr SkIRect SK_WARN_UNUSED_RESULT MakeEmpty() |
| |
| Returns constructed IRect 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) ## |
| |
| #Example |
| SkIRect rect = SkIRect::MakeEmpty();
|
| SkDebugf("MakeEmpty isEmpty: %s\n", rect.isEmpty() ? "true" : "false");
|
| rect.offset(10, 10);
|
| SkDebugf("offset rect isEmpty: %s\n", rect.isEmpty() ? "true" : "false");
|
| rect.inset(10, 10);
|
| SkDebugf("inset rect isEmpty: %s\n", rect.isEmpty() ? "true" : "false");
|
| rect.outset(20, 20);
|
| SkDebugf("outset rect isEmpty: %s\n", rect.isEmpty() ? "true" : "false");
|
| #StdOut
|
| MakeEmpty isEmpty: true
|
| offset rect isEmpty: true
|
| inset rect isEmpty: true
|
| outset rect isEmpty: false
|
| ##
|
| ## |
| |
| #SeeAlso EmptyIRect isEmpty setEmpty setLargestInverted SkRect::MakeEmpty |
| |
| ## |
| |
| # ------------------------------------------------------------------------------ |
| |
| #Method static SkIRect SK_WARN_UNUSED_RESULT MakeLargest() |
| |
| Returns constructed IRect setting left and top to most negative value, and |
| setting right and bottom to most positive value. |
| |
| #Return bounds (SK_MinS32, SK_MinS32, SK_MaxS32, SK_MaxS32) ## |
| |
| #Example |
| SkIRect rect = SkIRect::MakeLargest();
|
| SkDebugf("MakeLargest isLargest: %s\n", rect.isLargest() ? "true" : "false");
|
| SkDebugf("MakeLargest isEmpty: %s\n", rect.isEmpty() ? "true" : "false");
|
| rect.outset(1, 1);
|
| SkDebugf("outset isLargest: %s\n", rect.isLargest() ? "true" : "false");
|
| SkDebugf("outset isEmpty: %s\n", rect.isEmpty() ? "true" : "false");
|
| #StdOut
|
| MakeLargest isLargest: true
|
| MakeLargest isEmpty: false
|
| outset isLargest: false
|
| outset isEmpty: true
|
| ##
|
| ## |
| |
| #SeeAlso isLargest setLargest SkRect::MakeLargest |
| |
| ## |
| |
| # ------------------------------------------------------------------------------ |
| |
| #Method static constexpr SkIRect SK_WARN_UNUSED_RESULT MakeWH(int32_t w, int32_t h) |
| |
| Returns constructed IRect set to (0, 0, w, h). Does not validate input; w or h |
| may be negative. |
| |
| #Param w width of constructed Rect ## |
| #Param h height of constructed Rect ## |
| |
| #Return bounds (0, 0, w, h) ## |
| |
| #Example |
| SkIRect rect1 = SkIRect::MakeWH(25, 35);
|
| SkIRect rect2 = SkIRect::MakeSize({25, 35});
|
| SkIRect rect3 = SkIRect::MakeXYWH(0, 0, 25, 35);
|
| SkIRect rect4 = SkIRect::MakeLTRB(0, 0, 25, 35);
|
| SkDebugf("all %s" "equal\n", rect1 == rect2 && rect2 == rect3 && rect3 == rect4 ?
|
| "" : "not ");
|
| #StdOut |
| all equal |
| ## |
| ## |
| |
| #SeeAlso MakeSize MakeXYWH SkRect::MakeWH SkRect::MakeIWH |
| |
| ## |
| |
| # ------------------------------------------------------------------------------ |
| |
| #Method static constexpr SkIRect SK_WARN_UNUSED_RESULT MakeSize(const SkISize& size) |
| |
| Returns constructed IRect set to (0, 0, size.width(), size.height()). |
| Does not validate input; size.width() or size.height() may be negative. |
| |
| #Param size values for Rect width and height ## |
| |
| #Return bounds (0, 0, size.width(), size.height()) ## |
| |
| #Example |
| SkSize size = {25.5f, 35.5f};
|
| SkIRect rect = SkIRect::MakeSize(size.toRound());
|
| SkDebugf("round width: %d height: %d\n", rect.width(), rect.height());
|
| rect = SkIRect::MakeSize(size.toFloor());
|
| SkDebugf("floor width: %d height: %d\n", rect.width(), rect.height());
|
| #StdOut |
| round width: 26 height: 36
|
| floor width: 25 height: 35 |
| ## |
| ## |
| |
| #SeeAlso MakeWH MakeXYWH SkRect::Make SkRect::MakeIWH |
| |
| ## |
| |
| # ------------------------------------------------------------------------------ |
| |
| #Method static constexpr SkIRect SK_WARN_UNUSED_RESULT MakeLTRB(int32_t l, int32_t t, int32_t r, int32_t b) |
| |
| Returns constructed IRect set to (l, t, r, b). Does not sort input; Rect 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) ## |
| |
| #Example |
| SkIRect rect = SkIRect::MakeLTRB(5, 35, 15, 25);
|
| SkDebugf("rect: %d, %d, %d, %d isEmpty: %s\n", rect.left(), rect.top(), rect.right(),
|
| rect.bottom(), rect.isEmpty() ? "true" : "false");
|
| rect.sort();
|
| SkDebugf("rect: %d, %d, %d, %d isEmpty: %s\n", rect.left(), rect.top(), rect.right(),
|
| rect.bottom(), rect.isEmpty() ? "true" : "false");
|
| #StdOut |
| rect: 5, 35, 15, 25 isEmpty: true
|
| rect: 5, 25, 15, 35 isEmpty: false |
| ## |
| ## |
| |
| #SeeAlso MakeXYWH SkRect::MakeLTRB |
| |
| ## |
| |
| # ------------------------------------------------------------------------------ |
| |
| #Method static constexpr SkIRect SK_WARN_UNUSED_RESULT MakeXYWH(int32_t x, int32_t y, int32_t w, int32_t h) |
| |
| Returns constructed IRect set to |
| #Formula |
| (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 ## |
| |
| #Example |
| SkIRect rect = SkIRect::MakeXYWH(5, 35, -15, 25);
|
| SkDebugf("rect: %d, %d, %d, %d isEmpty: %s\n", rect.left(), rect.top(), rect.right(),
|
| rect.bottom(), rect.isEmpty() ? "true" : "false");
|
| rect.sort();
|
| SkDebugf("rect: %d, %d, %d, %d isEmpty: %s\n", rect.left(), rect.top(), rect.right(),
|
| rect.bottom(), rect.isEmpty() ? "true" : "false");
|
| #StdOut |
| rect: 5, 35, -10, 60 isEmpty: true
|
| rect: -10, 35, 5, 60 isEmpty: false |
| ## |
| ## |
| |
| #SeeAlso MakeLTRB SkRect::MakeXYWH |
| |
| ## |
| |
| # ------------------------------------------------------------------------------ |
| |
| #Method int left() const |
| |
| Returns left edge of IRect, if sorted. |
| Call sort() to reverse fLeft and fRight if needed. |
| |
| #Return fLeft ## |
| |
| #Example |
| SkIRect unsorted = { 15, 5, 10, 25 };
|
| SkDebugf("unsorted.fLeft: %d unsorted.left(): %d\n", unsorted.fLeft, unsorted.left());
|
| SkIRect sorted = unsorted.makeSorted();
|
| SkDebugf("sorted.fLeft: %d sorted.left(): %d\n", sorted.fLeft, sorted.left());
|
| #StdOut |
| unsorted.fLeft: 15 unsorted.left(): 15
|
| sorted.fLeft: 10 sorted.left(): 10 |
| ## |
| ## |
| |
| #SeeAlso fLeft x() SkRect::left() |
| |
| ## |
| |
| # ------------------------------------------------------------------------------ |
| |
| #Method int top() const |
| |
| Returns top edge of IRect, if sorted. Call isEmpty to see if IRect may be invalid, |
| and sort() to reverse fTop and fBottom if needed. |
| |
| #Return fTop ## |
| |
| #Example |
| SkIRect unsorted = { 15, 25, 10, 5 };
|
| SkDebugf("unsorted.fTop: %d unsorted.top(): %d\n", unsorted.fTop, unsorted.top());
|
| SkIRect sorted = unsorted.makeSorted();
|
| SkDebugf("sorted.fTop: %d sorted.top(): %d\n", sorted.fTop, sorted.top()); |
| #StdOut |
| unsorted.fTop: 25 unsorted.top(): 25
|
| sorted.fTop: 5 sorted.top(): 5 |
| ## |
| ## |
| |
| #SeeAlso fTop y() SkRect::top() |
| |
| ## |
| |
| # ------------------------------------------------------------------------------ |
| |
| #Method int right() const |
| |
| Returns right edge of IRect, if sorted. |
| Call sort() to reverse fLeft and fRight if needed. |
| |
| #Return fRight ## |
| |
| #Example |
| SkIRect unsorted = { 15, 25, 10, 5 };
|
| SkDebugf("unsorted.fRight: %d unsorted.right(): %d\n", unsorted.fRight, unsorted.right());
|
| SkIRect sorted = unsorted.makeSorted();
|
| SkDebugf("sorted.fRight: %d sorted.right(): %d\n", sorted.fRight, sorted.right());
|
| #StdOut |
| unsorted.fRight: 10 unsorted.right(): 10
|
| sorted.fRight: 15 sorted.right(): 15 |
| ## |
| ## |
| |
| #SeeAlso fRight SkRect::right() |
| |
| ## |
| |
| # ------------------------------------------------------------------------------ |
| |
| #Method int bottom() const |
| |
| Returns bottom edge of IRect, if sorted. Call isEmpty to see if IRect may be invalid, |
| and sort() to reverse fTop and fBottom if needed. |
| |
| #Return fBottom ## |
| |
| #Example |
| SkIRect unsorted = { 15, 25, 10, 5 };
|
| SkDebugf("unsorted.fBottom: %d unsorted.bottom(): %d\n", unsorted.fBottom, unsorted.bottom());
|
| SkIRect sorted = unsorted.makeSorted();
|
| SkDebugf("sorted.fBottom: %d sorted.bottom(): %d\n", sorted.fBottom, sorted.bottom());
|
| #StdOut |
| unsorted.fBottom: 5 unsorted.bottom(): 5
|
| sorted.fBottom: 25 sorted.bottom(): 25 |
| ## |
| ## |
| |
| #SeeAlso fBottom SkRect::bottom() |
| |
| ## |
| |
| # ------------------------------------------------------------------------------ |
| |
| #Method int x() const |
| |
| Returns left edge of IRect, if sorted. Call isEmpty to see if IRect may be invalid, |
| and sort() to reverse fLeft and fRight if needed. |
| |
| #Return fLeft ## |
| |
| #Example |
| SkIRect unsorted = { 15, 5, 10, 25 };
|
| SkDebugf("unsorted.fLeft: %d unsorted.x(): %d\n", unsorted.fLeft, unsorted.x());
|
| SkIRect sorted = unsorted.makeSorted();
|
| SkDebugf("sorted.fLeft: %d sorted.x(): %d\n", sorted.fLeft, sorted.x());
|
| #StdOut |
| unsorted.fLeft: 15 unsorted.x(): 15
|
| sorted.fLeft: 10 sorted.x(): 10 |
| ## |
| ## |
| |
| #SeeAlso fLeft left() y() SkRect::x() |
| |
| ## |
| |
| # ------------------------------------------------------------------------------ |
| |
| #Method int y() const |
| |
| Returns top edge of IRect, if sorted. Call isEmpty to see if IRect may be invalid, |
| and sort() to reverse fTop and fBottom if needed. |
| |
| #Return fTop ## |
| |
| #Example |
| SkIRect unsorted = { 15, 25, 10, 5 };
|
| SkDebugf("unsorted.fTop: %d unsorted.y(): %d\n", unsorted.fTop, unsorted.y());
|
| SkIRect sorted = unsorted.makeSorted();
|
| SkDebugf("sorted.fTop: %d sorted.y(): %d\n", sorted.fTop, sorted.y()); |
| #StdOut |
| unsorted.fTop: 25 unsorted.y(): 25
|
| sorted.fTop: 5 sorted.y(): 5 |
| ## |
| ## |
| |
| #SeeAlso fTop top() x() SkRect::y() |
| |
| ## |
| |
| # ------------------------------------------------------------------------------ |
| |
| #Method int width() const |
| |
| Returns span on the x-axis. This does not check if IRect is sorted, or if |
| result fits in 32-bit signed integer; result may be negative. |
| |
| #Return fRight minus fLeft ## |
| |
| #Example |
| SkIRect unsorted = { 15, 25, 10, 5 };
|
| SkDebugf("unsorted width: %d\n", unsorted.width());
|
| SkIRect large = { -2147483647, 1, 2147483644, 2 };
|
| SkDebugf("large width: %d\n", large.width());
|
| #StdOut |
| unsorted width: -5
|
| large width: -5 |
| ## |
| ## |
| |
| #SeeAlso height() SkRect::width() |
| |
| ## |
| |
| # ------------------------------------------------------------------------------ |
| |
| #Method int height() const |
| |
| Returns span on the y-axis. This does not check if IRect is sorted, or if |
| result fits in 32-bit signed integer; result may be negative. |
| |
| #Return fBottom minus fTop ## |
| |
| #Example |
| SkIRect unsorted = { 15, 25, 10, 20 };
|
| SkDebugf("unsorted height: %d\n", unsorted.height());
|
| SkIRect large = { 1, -2147483647, 2, 2147483644 };
|
| SkDebugf("large height: %d\n", large.height());
|
| #StdOut |
| unsorted height: -5
|
| large height: -5 |
| ## |
| ## |
| |
| #SeeAlso width() SkRect::height() |
| |
| ## |
| |
| # ------------------------------------------------------------------------------ |
| |
| #Method SkISize size() const |
| |
| Returns spans on the x-axis and y-axis. This does not check if IRect is sorted, |
| or if result fits in 32-bit signed integer; result may be negative. |
| |
| #Return ISize (width, height) ## |
| |
| #Example |
| auto debugster = [](const char* prefix, const SkIRect& rect) -> void {
|
| SkISize size = rect.size();
|
| SkDebugf("%s ", prefix);
|
| SkDebugf("rect: %d, %d, %d, %d ", rect.left(), rect.top(), rect.right(), rect.bottom());
|
| SkDebugf("size: %d, %d\n", size.width(), size.height());
|
| };
|
| SkIRect rect = {20, 30, 40, 50};
|
| debugster("original", rect);
|
| rect.offset(20, 20);
|
| debugster(" offset", rect);
|
| rect.outset(20, 20);
|
| debugster(" outset", rect); |
| #StdOut |
| original rect: 20, 30, 40, 50 size: 20, 20
|
| offset rect: 40, 50, 60, 70 size: 20, 20
|
| outset rect: 20, 30, 80, 90 size: 60, 60 |
| ## |
| ## |
| |
| #SeeAlso height() width() MakeSize |
| |
| ## |
| |
| # ------------------------------------------------------------------------------ |
| |
| #Method int centerX() const |
| |
| Returns average of left edge and right edge. Result does not change if Rect |
| is sorted. Result may be incorrect if Rect is far from the origin. |
| |
| Result is rounded down. |
| |
| #Return midpoint in x ## |
| |
| #Example |
| #Description |
| Dividing by two rounds towards zero. centerX uses a bit shift and rounds down. |
| ## |
| SkIRect tests[] = {{20, 30, 41, 51}, {-20, -30, -41, -51}, {-10, -10, 11, 11}};
|
| for (auto rect : tests) {
|
| SkDebugf("left: %3d right: %3d centerX: %3d ", rect.left(), rect.right(), rect.centerX());
|
| SkDebugf("div2: %3d\n", (rect.left() + rect.right()) / 2);
|
| }
|
| #StdOut |
| left: 20 right: 41 centerX: 30 div2: 30
|
| left: -20 right: -41 centerX: -31 div2: -30
|
| left: -10 right: 11 centerX: 0 div2: 0 |
| ## |
| ## |
| |
| #SeeAlso centerY SkRect::centerX |
| |
| ## |
| |
| # ------------------------------------------------------------------------------ |
| |
| #Method int centerY() const |
| |
| Returns average of top edge and bottom edge. Result does not change if Rect |
| is sorted. Result may be incorrect if Rect is far from the origin. |
| |
| Result is rounded down. |
| |
| #Return midpoint in y ## |
| |
| #Example |
| SkIRect rect = { 0, 0, 2, 2 };
|
| rect.offset(0x40000000, 0x40000000);
|
| SkDebugf("left: %d right: %d centerX: %d ", rect.left(), rect.right(), rect.centerX());
|
| SkDebugf("safe mid x: %d\n", rect.left() / 2 + rect.right() / 2); |
| #StdOut |
| left: 1073741824 right: 1073741826 centerX: -1073741823 safe mid x: 1073741825 |
| ## |
| ## |
| |
| #SeeAlso centerX SkRect::centerY |
| |
| ## |
| |
| # ------------------------------------------------------------------------------ |
| |
| #Method bool isEmpty() const |
| |
| 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 ## |
| |
| #Example |
| SkIRect tests[] = {{20, 40, 10, 50}, {20, 40, 20, 50}};
|
| for (auto rect : tests) {
|
| SkDebugf("rect: {%d, %d, %d, %d} is" "%s empty\n", rect.left(), rect.top(), rect.right(),
|
| rect.bottom(), rect.isEmpty() ? "" : " not");
|
| rect.sort();
|
| SkDebugf("sorted: {%d, %d, %d, %d} is" "%s empty\n", rect.left(), rect.top(), rect.right(),
|
| rect.bottom(), rect.isEmpty() ? "" : " not");
|
| } |
| #StdOut
|
| rect: {20, 40, 10, 50} is empty
|
| sorted: {10, 40, 20, 50} is not empty
|
| rect: {20, 40, 20, 50} is empty
|
| sorted: {20, 40, 20, 50} is empty
|
| ##
|
| ## |
| |
| #SeeAlso EmptyIRect MakeEmpty sort SkRect::isEmpty |
| |
| ## |
| |
| # ------------------------------------------------------------------------------ |
| |
| #Method bool isLargest() const |
| |
| Returns true if IRect encloses largest possible area. |
| |
| #Return true if equal to (SK_MinS32, SK_MinS32, SK_MaxS32, SK_MaxS32) ## |
| |
| #Example |
| #Description |
| Note that the width is not negative, yet it cannot be represented as a 32-bit |
| signed integer. |
| ## |
| SkIRect large = SkIRect::MakeLargest();
|
| SkDebugf("large is largest: %s\n" ,large.isLargest() ? "true" : "false");
|
| SkDebugf("large width %d\n", large.width());
|
| SkDebugf("large is empty: %s\n", large.isEmpty() ? "true" : "false"); |
| #StdOut
|
| large is largest: true
|
| large width -2
|
| large is empty: false
|
| ##
|
| ## |
| |
| #SeeAlso MakeLargest SkRect::isLargest |
| |
| ## |
| |
| # ------------------------------------------------------------------------------ |
| |
| #Method bool operator==(const SkIRect& a, const SkIRect& b) |
| |
| Returns true if all members in a: fLeft, fTop, fRight, and fBottom; are |
| identical to corresponding members in b. |
| |
| #Param a IRect to compare ## |
| #Param b IRect to compare ## |
| |
| #Return true if members are equal ## |
| |
| #Example |
| SkIRect test = {0, 0, 2, 2};
|
| SkIRect sorted = test.makeSorted();
|
| SkDebugf("test %c= sorted\n", test == sorted ? '=' : '!'); |
| #StdOut
|
| test == sorted
|
| ##
|
| ## |
| |
| #SeeAlso operator!=(const SkIRect& a, const SkIRect& b) |
| |
| ## |
| |
| # ------------------------------------------------------------------------------ |
| |
| #Method bool operator!=(const SkIRect& a, const SkIRect& b) |
| |
| Returns true if any member in a: fLeft, fTop, fRight, and fBottom; is not |
| identical to the corresponding member in b. |
| |
| #Param a IRect to compare ## |
| #Param b IRect to compare ## |
| |
| #Return true if members are not equal ## |
| |
| #Example |
| SkIRect test = {2, 2, 0, 0};
|
| SkIRect sorted = test.makeSorted();
|
| SkDebugf("test %c= sorted\n", test != sorted ? '!' : '=');
|
| #StdOut
|
| test != sorted
|
| ##
|
| ## |
| |
| #SeeAlso operator==(const SkIRect& a, const SkIRect& b) |
| |
| ## |
| |
| # ------------------------------------------------------------------------------ |
| |
| #Method bool is16Bit() const |
| |
| Returns true if all members: fLeft, fTop, fRight, and fBottom; values are |
| equal to or larger than -32768 and equal to or smaller than 32767. |
| |
| #Return true if members fit in 16-bit word ## |
| |
| #Example |
| SkIRect tests[] = {{-32768, -32768, 32767, 32767}, {-32768, -32768, 32768, 32768}};
|
| for (auto rect : tests) {
|
| SkDebugf("{%d, %d, %d, %d} %s in 16 bits\n", rect.fLeft, rect.fTop, rect.fRight,
|
| rect.fBottom, rect.is16Bit() ? "fits" : "does not fit");
|
| }
|
| #StdOut
|
| {-32768, -32768, 32767, 32767} fits in 16 bits
|
| {-32768, -32768, 32768, 32768} does not fit in 16 bits
|
| ##
|
| ## |
| |
| #SeeAlso SkTFitsIn |
| |
| ## |
| |
| # ------------------------------------------------------------------------------ |
| |
| #Method void setEmpty() |
| |
| Sets IRect 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. |
| |
| #Example |
| SkIRect rect = {3, 4, 1, 2};
|
| for (int i = 0; i < 2; ++i) {
|
| SkDebugf("rect: {%d, %d, %d, %d} is %s" "empty\n", rect.fLeft, rect.fTop,
|
| rect.fRight, rect.fBottom, rect.isEmpty() ? "" : "not ");
|
| rect.setEmpty();
|
| }
|
| #StdOut
|
| rect: {3, 4, 1, 2} is empty
|
| rect: {0, 0, 0, 0} is empty
|
| ##
|
| ## |
| |
| #SeeAlso MakeEmpty SkRect::setEmpty |
| |
| ## |
| |
| # ------------------------------------------------------------------------------ |
| |
| #Method void set(int32_t left, int32_t top, int32_t right, int32_t bottom) |
| |
| Sets IRect 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 ## |
| |
| #Example |
| SkIRect rect1 = {3, 4, 1, 2};
|
| SkDebugf("rect1: {%d, %d, %d, %d}\n", rect1.fLeft, rect1.fTop, rect1.fRight, rect1.fBottom);
|
| SkIRect rect2;
|
| rect2.set(3, 4, 1, 2);
|
| SkDebugf("rect2: {%d, %d, %d, %d}\n", rect2.fLeft, rect2.fTop, rect2.fRight, rect2.fBottom);
|
| #StdOut
|
| rect1: {3, 4, 1, 2}
|
| rect2: {3, 4, 1, 2}
|
| ##
|
| ## |
| |
| #SeeAlso setLTRB setXYWH SkRect::set |
| |
| ## |
| |
| # ------------------------------------------------------------------------------ |
| |
| #Method void setLTRB(int32_t left, int32_t top, int32_t right, int32_t bottom) |
| |
| Sets IRect 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 ## |
| |
| #Example |
| SkIRect rect1 = {3, 4, 1, 2};
|
| SkDebugf("rect1: {%d, %d, %d, %d}\n", rect1.fLeft, rect1.fTop, rect1.fRight, rect1.fBottom);
|
| SkIRect rect2;
|
| rect2.setLTRB(3, 4, 1, 2);
|
| SkDebugf("rect2: {%d, %d, %d, %d}\n", rect2.fLeft, rect2.fTop, rect2.fRight, rect2.fBottom);
|
| #StdOut
|
| rect1: {3, 4, 1, 2}
|
| rect2: {3, 4, 1, 2}
|
| ##
|
| ## |
| |
| #SeeAlso set setXYWH SkRect::setLTRB |
| |
| ## |
| |
| # ------------------------------------------------------------------------------ |
| |
| #Method void setXYWH(int32_t x, int32_t y, int32_t width, int32_t height) |
| |
| Sets IRect to |
| #Formula |
| (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 ## |
| |
| #Example |
| SkIRect rect;
|
| rect.setXYWH(5, 35, -15, 25);
|
| SkDebugf("rect: %d, %d, %d, %d isEmpty: %s\n", rect.left(), rect.top(), rect.right(),
|
| rect.bottom(), rect.isEmpty() ? "true" : "false");
|
| rect.sort();
|
| SkDebugf("rect: %d, %d, %d, %d isEmpty: %s\n", rect.left(), rect.top(), rect.right(),
|
| rect.bottom(), rect.isEmpty() ? "true" : "false");
|
| #StdOut |
| rect: 5, 35, -10, 60 isEmpty: true
|
| rect: -10, 35, 5, 60 isEmpty: false |
| ## |
| ## |
| |
| #SeeAlso MakeXYWH setLTRB set SkRect::setXYWH |
| |
| ## |
| |
| # ------------------------------------------------------------------------------ |
| |
| #Method void setLargest() |
| |
| Sets rectangle left and top to most negative value, and sets |
| right and bottom to most positive value. |
| |
| #Example |
| SkIRect rect;
|
| rect.setLargest();
|
| SkDebugf("MakeLargest isLargest: %s\n", rect.isLargest() ? "true" : "false");
|
| SkDebugf("MakeLargest isEmpty: %s\n", rect.isEmpty() ? "true" : "false");
|
| rect.outset(1, 1);
|
| SkDebugf("outset isLargest: %s\n", rect.isLargest() ? "true" : "false");
|
| SkDebugf("outset isEmpty: %s\n", rect.isEmpty() ? "true" : "false");
|
| #StdOut
|
| MakeLargest isLargest: true
|
| MakeLargest isEmpty: false
|
| outset isLargest: false
|
| outset isEmpty: true
|
| ##
|
| ## |
| |
| #SeeAlso MakeLargest isLargest setLargestInverted SK_MinS32 SK_MaxS32 |
| |
| ## |
| |
| # ------------------------------------------------------------------------------ |
| |
| #Method void setLargestInverted() |
| #ToDo move this to private |
| ## |
| |
| Sets rectangle left and top to most positive value, and sets |
| right and bottom to most negative value. This is used internally to |
| flag that a condition is met, but otherwise has no special purpose. |
| |
| #NoExample |
| ## |
| |
| #SeeAlso setEmpty setLargest |
| |
| ## |
| |
| # ------------------------------------------------------------------------------ |
| |
| #Method SkIRect makeOffset(int32_t dx, int32_t dy) const |
| |
| Returns IRect offset by (dx, dy). |
| |
| If dx is negative, IRect returned is moved to the left. |
| If dx is positive, IRect returned is moved to the right. |
| If dy is negative, IRect returned is moved upward. |
| If dy is positive, IRect returned is moved downward. |
| |
| #Param dx offset added to fLeft and fRight ## |
| #Param dy offset added to fTop and fBottom ## |
| |
| #Return Rect offset in x or y, with original width and height ## |
| |
| #Example |
| SkIRect rect = { 10, 50, 20, 60 };
|
| SkDebugf("rect: %d, %d, %d, %d isEmpty: %s\n", rect.left(), rect.top(), rect.right(),
|
| rect.bottom(), rect.isEmpty() ? "true" : "false");
|
| rect = rect.makeOffset(15, 32);
|
| SkDebugf("rect: %d, %d, %d, %d isEmpty: %s\n", rect.left(), rect.top(), rect.right(),
|
| rect.bottom(), rect.isEmpty() ? "true" : "false");
|
| #StdOut
|
| rect: 10, 50, 20, 60 isEmpty: false
|
| rect: 25, 82, 35, 92 isEmpty: false
|
| ##
|
| ## |
| |
| #SeeAlso offset() makeInset makeOutset SkRect::makeOffset |
| |
| ## |
| |
| # ------------------------------------------------------------------------------ |
| |
| #Method SkIRect makeInset(int32_t dx, int32_t dy) const |
| |
| Returns IRect, inset by (dx, dy). |
| |
| If dx is negative, IRect returned is wider. |
| If dx is positive, IRect returned is narrower. |
| If dy is negative, IRect returned is taller. |
| If dy is positive, IRect returned is shorter. |
| |
| #Param dx offset added to fLeft and subtracted from fRight ## |
| #Param dy offset added to fTop and subtracted from fBottom ## |
| |
| #Return Rect inset symmetrically left and right, top and bottom ## |
| |
| #Example |
| SkIRect rect = { 10, 50, 20, 60 };
|
| SkDebugf("rect: %d, %d, %d, %d isEmpty: %s\n", rect.left(), rect.top(), rect.right(),
|
| rect.bottom(), rect.isEmpty() ? "true" : "false");
|
| rect = rect.makeInset(15, 32);
|
| SkDebugf("rect: %d, %d, %d, %d isEmpty: %s\n", rect.left(), rect.top(), rect.right(),
|
| rect.bottom(), rect.isEmpty() ? "true" : "false");
|
| #StdOut
|
| rect: 10, 50, 20, 60 isEmpty: false
|
| rect: 25, 82, 5, 28 isEmpty: true
|
| ##
|
| ## |
| |
| #SeeAlso inset() makeOffset makeOutset SkRect::makeInset |
| |
| ## |
| |
| # ------------------------------------------------------------------------------ |
| |
| #Method SkIRect makeOutset(int32_t dx, int32_t dy) const |
| |
| Returns IRect, outset by (dx, dy). |
| |
| If dx is negative, IRect returned is narrower. |
| If dx is positive, IRect returned is wider. |
| If dy is negative, IRect returned is shorter. |
| If dy is positive, IRect returned is taller. |
| |
| #Param dx offset subtracted to fLeft and added from fRight ## |
| #Param dy offset subtracted to fTop and added from fBottom ## |
| |
| #Return Rect outset symmetrically left and right, top and bottom ## |
| |
| #Example |
| SkIRect rect = { 10, 50, 20, 60 };
|
| SkDebugf("rect: %d, %d, %d, %d isEmpty: %s\n", rect.left(), rect.top(), rect.right(),
|
| rect.bottom(), rect.isEmpty() ? "true" : "false");
|
| rect = rect.makeOutset(15, 32);
|
| SkDebugf("rect: %d, %d, %d, %d isEmpty: %s\n", rect.left(), rect.top(), rect.right(),
|
| rect.bottom(), rect.isEmpty() ? "true" : "false");
|
| #StdOut
|
| rect: 10, 50, 20, 60 isEmpty: false
|
| rect: -5, 18, 35, 92 isEmpty: false
|
| ##
|
| ## |
| |
| #SeeAlso outset() makeOffset makeInset SkRect::makeOutset |
| |
| ## |
| |
| # ------------------------------------------------------------------------------ |
| |
| #Method void offset(int32_t dx, int32_t dy) |
| |
| Offsets IRect by adding dx to fLeft, fRight; and by adding dy to fTop, fBottom. |
| |
| If dx is negative, moves IRect returned to the left. |
| If dx is positive, moves IRect returned to the right. |
| If dy is negative, moves IRect returned upward. |
| If dy is positive, moves IRect returned downward. |
| |
| #Param dx offset added to fLeft and fRight ## |
| #Param dy offset added to fTop and fBottom ## |
| |
| #Example |
| SkIRect rect = { 10, 14, 50, 73 };
|
| rect.offset(5, 13);
|
| SkDebugf("rect: %d, %d, %d, %d\n", rect.fLeft, rect.fTop, rect.fRight, rect.fBottom);
|
| #StdOut
|
| rect: 15, 27, 55, 86
|
| ##
|
| ## |
| |
| #SeeAlso offsetTo makeOffset SkRect::offset |
| |
| ## |
| |
| # ------------------------------------------------------------------------------ |
| |
| #Method void offset(const SkIPoint& delta) |
| |
| Offsets IRect by adding delta.fX to fLeft, fRight; and by adding delta.fY to |
| fTop, fBottom. |
| |
| If delta.fX is negative, moves IRect returned to the left. |
| If delta.fX is positive, moves IRect returned to the right. |
| If delta.fY is negative, moves IRect returned upward. |
| If delta.fY is positive, moves IRect returned downward. |
| |
| #Param delta offset added to IRect ## |
| |
| #Example |
| SkIRect rect = { 10, 14, 50, 73 };
|
| rect.offset({5, 13});
|
| SkDebugf("rect: %d, %d, %d, %d\n", rect.fLeft, rect.fTop, rect.fRight, rect.fBottom);
|
| #StdOut
|
| rect: 15, 27, 55, 86
|
| ##
|
| ## |
| |
| #SeeAlso offsetTo makeOffset SkRect::offset |
| |
| ## |
| |
| # ------------------------------------------------------------------------------ |
| |
| #Method void offsetTo(int32_t newX, int32_t newY) |
| |
| Offsets IRect 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() ## |
| |
| #Example |
| SkIRect rect = { 10, 14, 50, 73 };
|
| rect.offsetTo(15, 27);
|
| SkDebugf("rect: %d, %d, %d, %d\n", rect.fLeft, rect.fTop, rect.fRight, rect.fBottom);
|
| #StdOut
|
| rect: 15, 27, 55, 86
|
| ##
|
| ## |
| |
| #SeeAlso offset makeOffset setXYWH SkRect::offsetTo |
| |
| ## |
| |
| # ------------------------------------------------------------------------------ |
| |
| #Method void inset(int32_t dx, int32_t dy) |
| |
| Insets IRect by (dx,dy). |
| |
| If dx is positive, makes IRect narrower. |
| If dx is negative, makes IRect wider. |
| If dy is positive, makes IRect shorter. |
| If dy is negative, makes IRect taller. |
| |
| #Param dx offset added to fLeft and subtracted from fRight ## |
| #Param dy offset added to fTop and subtracted from fBottom ## |
| |
| #Example |
| SkIRect rect = { 10, 14, 50, 73 };
|
| rect.inset(5, 13);
|
| SkDebugf("rect: %d, %d, %d, %d\n", rect.fLeft, rect.fTop, rect.fRight, rect.fBottom);
|
| #StdOut
|
| rect: 15, 27, 45, 60
|
| ##
|
| ## |
| |
| #SeeAlso outset makeInset SkRect::inset |
| |
| ## |
| |
| # ------------------------------------------------------------------------------ |
| |
| #Method void outset(int32_t dx, int32_t dy) |
| |
| Outsets IRect by (dx, dy). |
| |
| If dx is positive, makes Rect wider. |
| If dx is negative, makes Rect narrower. |
| If dy is positive, makes Rect taller. |
| If dy is negative, makes Rect shorter. |
| |
| #Param dx subtracted to fLeft and added from fRight ## |
| #Param dy subtracted to fTop and added from fBottom ## |
| |
| #Example |
| SkIRect rect = { 10, 14, 50, 73 };
|
| rect.outset(5, 13);
|
| SkDebugf("rect: %d, %d, %d, %d\n", rect.fLeft, rect.fTop, rect.fRight, rect.fBottom);
|
| #StdOut
|
| rect: 5, 1, 55, 86
|
| ##
|
| ## |
| |
| #SeeAlso inset makeOutset SkRect::outset |
| |
| ## |
| |
| # ------------------------------------------------------------------------------ |
| |
| #Method bool quickReject(int l, int t, int r, int b) const |
| |
| Constructs IRect (l, t, r, b) and returns true if constructed IRect does not |
| intersect IRect. Does not check to see if construction or IRect is empty. |
| |
| Is implemented with short circuit logic so that true can be returned after |
| a single compare. |
| |
| #Param l x minimum of constructed Rect ## |
| #Param t y minimum of constructed Rect ## |
| #Param r x maximum of constructed Rect ## |
| #Param b y maximum of constructed Rect ## |
| |
| #Return true if construction and IRect have no area in common ## |
| |
| #Example |
| #Description |
| quickReject is the complement of Intersects. |
| ## |
| const SkIRect rect = {7, 11, 13, 17};
|
| const int32_t* r = &rect.fLeft;
|
| const SkIRect tests[] = { {13, 11, 15, 17}, { 7, 7, 13, 11 }, { 12, 16, 14, 18 } };
|
| for (auto& test : tests) {
|
| const int32_t* t = &test.fLeft;
|
| SkDebugf("rect (%d, %d, %d, %d) test(%d, %d, %d, %d) quickReject %s; intersects %s\n",
|
| r[0], r[1], r[2], r[3], t[0], t[1], t[2], t[3],
|
| rect.quickReject(t[0], t[1], t[2], t[3]) ? "true" : "false",
|
| SkIRect::Intersects(rect, test) ? "true" : "false");
|
| }
|
| #StdOut
|
| rect (7, 11, 13, 17) test(13, 11, 15, 17) quickReject true; intersects false
|
| rect (7, 11, 13, 17) test(7, 7, 13, 11) quickReject true; intersects false
|
| rect (7, 11, 13, 17) test(12, 16, 14, 18) quickReject false; intersects true
|
| ##
|
| ## |
| |
| #SeeAlso Intersects |
| |
| ## |
| |
| # ------------------------------------------------------------------------------ |
| |
| #Method bool contains(int32_t x, int32_t y) const |
| |
| Returns true if |
| #Formula |
| fLeft <= x < fRight && fTop <= y < fBottom |
| ## |
| . |
| Returns false if Rect is empty. |
| |
| Considers input to describe constructed IRect (x, y, x + 1, y + 1) and |
| returns true if constructed area is completely enclosed by IRect area. |
| |
| #Param x test Point x-coordinate ## |
| #Param y test Point y-coordinate ## |
| |
| #Return true if (x, y) is inside IRect ## |
| |
| #Example |
| SkIRect rect = { 30, 50, 40, 60 };
|
| SkIPoint pts[] = { { 30, 50}, { 40, 50}, { 30, 60} };
|
| for (auto pt : pts) {
|
| SkDebugf("rect: (%d, %d, %d, %d) %s (%d, %d)\n",
|
| rect.left(), rect.top(), rect.right(), rect.bottom(),
|
| rect.contains(pt.x(), pt.y()) ? "contains" : "does not contain", pt.x(), pt.y());
|
| }
|
| #StdOut
|
| rect: (30, 50, 40, 60) contains (30, 50)
|
| rect: (30, 50, 40, 60) does not contain (40, 50)
|
| rect: (30, 50, 40, 60) does not contain (30, 60)
|
| ##
|
| ## |
| |
| #SeeAlso containsNoEmptyCheck SkRect::contains |
| |
| ## |
| |
| # ------------------------------------------------------------------------------ |
| |
| #Method bool contains(int32_t left, int32_t top, int32_t right, int32_t bottom) const |
| |
| Constructs Rect to intersect from (left, top, right, bottom). Does not sort |
| construction. |
| |
| Returns true if Rect contains construction. |
| Returns false if Rect is empty or construction is empty. |
| |
| #Param left x minimum of constructed Rect ## |
| #Param top y minimum of constructed Rect ## |
| #Param right x maximum of constructed Rect ## |
| #Param bottom y maximum of constructed Rect ## |
| |
| #Return true if all sides of IRect are outside construction ## |
| |
| #Example |
| SkIRect rect = { 30, 50, 40, 60 };
|
| SkIRect tests[] = { { 30, 50, 31, 51}, { 39, 49, 40, 50}, { 29, 59, 30, 60} };
|
| for (auto contained : tests) {
|
| bool success = rect.contains(
|
| contained.left(), contained.top(), contained.right(), contained.bottom());
|
| SkDebugf("rect: (%d, %d, %d, %d) %s (%d, %d, %d, %d)\n",
|
| rect.left(), rect.top(), rect.right(), rect.bottom(),
|
| success ? "contains" : "does not contain",
|
| contained.left(), contained.top(), contained.right(), contained.bottom());
|
| }
|
| #StdOut
|
| rect: (30, 50, 40, 60) contains (30, 50, 31, 51)
|
| rect: (30, 50, 40, 60) does not contain (39, 49, 40, 50)
|
| rect: (30, 50, 40, 60) does not contain (29, 59, 30, 60)
|
| ##
|
| ## |
| |
| #SeeAlso containsNoEmptyCheck SkRect::contains |
| |
| ## |
| |
| # ------------------------------------------------------------------------------ |
| |
| #Method bool contains(const SkIRect& r) const |
| |
| Returns true if Rect contains r. |
| Returns false if Rect is empty or r is empty. |
| |
| Rect contains r when Rect area completely includes r area. |
| |
| #Param r IRect contained ## |
| |
| #Return true if all sides of IRect are outside r ## |
| |
| #Example |
| SkIRect rect = { 30, 50, 40, 60 };
|
| SkIRect tests[] = { { 30, 50, 31, 51}, { 39, 49, 40, 50}, { 29, 59, 30, 60} };
|
| for (auto contained : tests) {
|
| SkDebugf("rect: (%d, %d, %d, %d) %s (%d, %d, %d, %d)\n",
|
| rect.left(), rect.top(), rect.right(), rect.bottom(),
|
| rect.contains(contained) ? "contains" : "does not contain",
|
| contained.left(), contained.top(), contained.right(), contained.bottom());
|
| }
|
| #StdOut
|
| rect: (30, 50, 40, 60) contains (30, 50, 31, 51)
|
| rect: (30, 50, 40, 60) does not contain (39, 49, 40, 50)
|
| rect: (30, 50, 40, 60) does not contain (29, 59, 30, 60)
|
| ##
|
| ## |
| |
| #SeeAlso containsNoEmptyCheck SkRect::contains |
| |
| ## |
| |
| # ------------------------------------------------------------------------------ |
| |
| #Method bool contains(const SkRect& r) const |
| |
| Returns true if Rect contains r. |
| Returns false if Rect is empty or r is empty. |
| |
| Rect contains r when Rect area completely includes r area. |
| |
| #Param r Rect contained ## |
| |
| #Return true if all sides of IRect are outside r ## |
| |
| #Example |
| SkIRect rect = { 30, 50, 40, 60 };
|
| SkRect tests[] = { { 30, 50, 31, 51}, { 39, 49, 40, 50}, { 29, 59, 30, 60} };
|
| for (auto contained : tests) {
|
| SkDebugf("rect: (%d, %d, %d, %d) %s (%g, %g, %g, %g)\n",
|
| rect.left(), rect.top(), rect.right(), rect.bottom(),
|
| rect.contains(contained) ? "contains" : "does not contain",
|
| contained.left(), contained.top(), contained.right(), contained.bottom());
|
| }
|
| #StdOut
|
| rect: (30, 50, 40, 60) contains (30, 50, 31, 51)
|
| rect: (30, 50, 40, 60) does not contain (39, 49, 40, 50)
|
| rect: (30, 50, 40, 60) does not contain (29, 59, 30, 60)
|
| ##
|
| ## |
| |
| #SeeAlso containsNoEmptyCheck SkRect::contains |
| |
| ## |
| |
| # ------------------------------------------------------------------------------ |
| |
| #Method bool containsNoEmptyCheck(int32_t left, int32_t top, |
| int32_t right, int32_t bottom) const |
| |
| Constructs IRect from (left, top, right, bottom). Does not sort |
| construction. |
| |
| Returns true if Rect contains construction. |
| Asserts if IRect is empty or construction is empty, and if SK_DEBUG is defined. |
| |
| Return is undefined if Rect is empty or construction is empty. |
| |
| #Param left x minimum of constructed Rect ## |
| #Param top y minimum of constructed Rect ## |
| #Param right x maximum of constructed Rect ## |
| #Param bottom y maximum of constructed Rect ## |
| |
| #Return true if all sides of IRect are outside construction ## |
| |
| #Example |
| SkIRect rect = { 30, 50, 40, 60 };
|
| SkIRect tests[] = { { 30, 50, 31, 51}, { 39, 49, 40, 50}, { 29, 59, 30, 60} };
|
| for (auto contained : tests) {
|
| bool success = rect.containsNoEmptyCheck(
|
| contained.left(), contained.top(), contained.right(), contained.bottom());
|
| SkDebugf("rect: (%d, %d, %d, %d) %s (%d, %d, %d, %d)\n",
|
| rect.left(), rect.top(), rect.right(), rect.bottom(),
|
| success ? "contains" : "does not contain",
|
| contained.left(), contained.top(), contained.right(), contained.bottom());
|
| }
|
| #StdOut
|
| rect: (30, 50, 40, 60) contains (30, 50, 31, 51)
|
| rect: (30, 50, 40, 60) does not contain (39, 49, 40, 50)
|
| rect: (30, 50, 40, 60) does not contain (29, 59, 30, 60)
|
| ##
|
| ## |
| |
| #SeeAlso contains SkRect::contains |
| |
| ## |
| |
| # ------------------------------------------------------------------------------ |
| |
| #Method bool containsNoEmptyCheck(const SkIRect& r) const |
| |
| Returns true if Rect contains construction. |
| Asserts if IRect is empty or construction is empty, and if SK_DEBUG is defined. |
| |
| Return is undefined if Rect is empty or construction is empty. |
| |
| #Param r Rect contained ## |
| |
| #Return true if all sides of IRect are outside r ## |
| |
| #Example |
| SkIRect rect = { 30, 50, 40, 60 };
|
| SkIRect tests[] = { { 30, 50, 31, 51}, { 39, 49, 40, 50}, { 29, 59, 30, 60} };
|
| for (auto contained : tests) {
|
| SkDebugf("rect: (%d, %d, %d, %d) %s (%d, %d, %d, %d)\n",
|
| rect.left(), rect.top(), rect.right(), rect.bottom(),
|
| rect.containsNoEmptyCheck(contained) ? "contains" : "does not contain",
|
| contained.left(), contained.top(), contained.right(), contained.bottom());
|
| }
|
| #StdOut
|
| rect: (30, 50, 40, 60) contains (30, 50, 31, 51)
|
| rect: (30, 50, 40, 60) does not contain (39, 49, 40, 50)
|
| rect: (30, 50, 40, 60) does not contain (29, 59, 30, 60)
|
| ##
|
| ## |
| |
| #SeeAlso contains SkRect::contains |
| |
| ## |
| |
| #Topic Intersection |
| |
| IRects intersect when they enclose a common area. To intersect, each of the pair |
| must describe area; fLeft is less than fRight, and fTop is less than fBottom; |
| empty() returns false. The intersection of IRect a and IRect b can be described by: |
| #Formula |
| (max(a.fLeft, b.fLeft), max(a.fTop, b.fTop), |
| min(a.fRight, b.fRight), min(a.fBottom, b.fBottom)) |
| ## |
| The intersection is only meaningful if the resulting IRect is not empty and |
| describes an area: fLeft is less than fRight, and fTop is less than fBottom. |
| |
| # ------------------------------------------------------------------------------ |
| |
| #Method bool intersect(const SkIRect& r) |
| |
| Returns true if IRect intersects r, and sets IRect to intersection. |
| Returns false if IRect does not intersect r, and leaves IRect unchanged. |
| |
| Returns false if either r or IRect is empty, leaving IRect unchanged. |
| |
| #Param r limit of result ## |
| |
| #Return true if r and Rect have area in common ## |
| |
| #Example |
| #Description |
| Two SkDebugf calls are required. If the calls are combined, their arguments |
| may not be evaluated in left to right order: the printed intersection may |
| be before or after the call to intersect. |
| ## |
| SkIRect leftRect = { 10, 40, 50, 80 };
|
| SkIRect rightRect = { 30, 60, 70, 90 };
|
| SkDebugf("%s intersection: ", leftRect.intersect(rightRect) ? "" : "no ");
|
| SkDebugf("%d, %d, %d, %d\n", leftRect.left(), leftRect.top(),
|
| leftRect.right(), leftRect.bottom()); |
| #StdOut |
| intersection: 30, 60, 50, 80 |
| ## |
| ## |
| |
| #SeeAlso Intersects intersectNoEmptyCheck join SkRect::intersect |
| |
| ## |
| |
| # ------------------------------------------------------------------------------ |
| |
| #Method bool SK_WARN_UNUSED_RESULT intersect(const SkIRect& a, const SkIRect& b) |
| |
| Returns true if a intersects b, and sets IRect to intersection. |
| Returns false if a does not intersect b, and leaves IRect unchanged. |
| |
| Returns false if either a or b is empty, leaving IRect unchanged. |
| |
| #Param a IRect to intersect ## |
| #Param b IRect to intersect ## |
| |
| #Return true if a and b have area in common ## |
| |
| #Example |
| SkIRect result;
|
| bool intersected = result.intersect({ 10, 40, 50, 80 }, { 30, 60, 70, 90 });
|
| SkDebugf("%s intersection: %d, %d, %d, %d\n", intersected ? "" : "no ",
|
| result.left(), result.top(), result.right(), result.bottom());
|
| #StdOut |
| intersection: 30, 60, 50, 80 |
| ## |
| ## |
| |
| #SeeAlso Intersects intersectNoEmptyCheck join SkRect::intersect |
| |
| ## |
| |
| # ------------------------------------------------------------------------------ |
| |
| #Method bool SK_WARN_UNUSED_RESULT intersectNoEmptyCheck(const SkIRect& a, const SkIRect& b) |
| |
| Returns true if a intersects b, and sets IRect to intersection. |
| Returns false if a does not intersect b, and leaves IRect unchanged. |
| |
| Asserts if either a or b is empty, and if SK_DEBUG is defined. |
| |
| #Param a IRect to intersect ## |
| #Param b IRect to intersect ## |
| |
| #Return true if a and b have area in common ## |
| |
| #Example |
| SkIRect result;
|
| bool intersected = result.intersectNoEmptyCheck({ 10, 40, 50, 80 }, { 30, 60, 70, 90 });
|
| SkDebugf("intersection: %d, %d, %d, %d\n",
|
| result.left(), result.top(), result.right(), result.bottom());
|
| #StdOut |
| intersection: 30, 60, 50, 80 |
| ## |
| ## |
| |
| #SeeAlso Intersects intersect join SkRect::intersect |
| |
| ## |
| |
| # ------------------------------------------------------------------------------ |
| |
| #Method bool intersect(int32_t left, int32_t top, int32_t right, int32_t bottom) |
| |
| Constructs IRect to intersect from (left, top, right, bottom). Does not sort |
| construction. |
| |
| Returns true if IRect intersects construction, and sets IRect to intersection. |
| Returns false if IRect does not intersect construction, and leaves IRect unchanged. |
| |
| Returns false if either construction or IRect is empty, leaving IRect unchanged. |
| |
| #Param left x minimum of constructed IRect ## |
| #Param top y minimum of constructed IRect ## |
| #Param right x maximum of constructed IRect ## |
| #Param bottom y maximum of constructed IRect ## |
| |
| #Return true if construction and IRect have area in common ## |
| |
| #Example |
| #Description |
| Two SkDebugf calls are required. If the calls are combined, their arguments |
| may not be evaluated in left to right order: the printed intersection may |
| be before or after the call to intersect. |
| ## |
| SkIRect leftRect = { 10, 40, 50, 80 };
|
| SkDebugf("%s intersection: ", leftRect.intersect(30, 60, 70, 90) ? "" : "no ");
|
| SkDebugf("%d, %d, %d, %d\n", leftRect.left(), leftRect.top(),
|
| leftRect.right(), leftRect.bottom()); |
| #StdOut |
| intersection: 30, 60, 50, 80 |
| ## |
| ## |
| |
| #SeeAlso intersectNoEmptyCheck Intersects join SkRect::intersect |
| |
| ## |
| |
| # ------------------------------------------------------------------------------ |
| |
| #Method static bool Intersects(const SkIRect& a, const SkIRect& b) |
| |
| Returns true if a intersects b. |
| Returns false if either a or b is empty, or do not intersect. |
| |
| #Param a IRect to intersect ## |
| #Param b IRect to intersect ## |
| |
| #Return true if a and b have area in common ## |
| |
| #Example |
| SkDebugf("%s intersection", SkIRect::Intersects({10, 40, 50, 80}, {30, 60, 70, 90}) ? "" : "no ");
|
| #StdOut |
| intersection |
| ## |
| ## |
| |
| #SeeAlso IntersectsNoEmptyCheck intersect SkRect::intersect |
| |
| ## |
| |
| # ------------------------------------------------------------------------------ |
| |
| #Method static bool IntersectsNoEmptyCheck(const SkIRect& a, const SkIRect& b) |
| |
| Returns true if a intersects b. |
| Asserts if either a or b is empty, and if SK_DEBUG is defined. |
| |
| #Param a IRect to intersect ## |
| #Param b IRect to intersect ## |
| |
| #Return true if a and b have area in common ## |
| |
| #Example |
| SkDebugf("%s intersection", SkIRect::IntersectsNoEmptyCheck(
|
| {10, 40, 50, 80}, {30, 60, 70, 90}) ? "" : "no ");
|
| #StdOut |
| intersection |
| ## |
| ## |
| |
| #SeeAlso Intersects intersect SkRect::intersect |
| |
| ## |
| |
| #Topic Intersection ## |
| |
| # ------------------------------------------------------------------------------ |
| |
| #Method void join(int32_t left, int32_t top, int32_t right, int32_t bottom) |
| |
| Constructs Rect to intersect from (left, top, right, bottom). Does not sort |
| construction. |
| |
| Sets Rect to the union of itself and the construction. |
| |
| Has no effect if construction is empty. Otherwise, if Rect is empty, sets |
| Rect to construction. |
| |
| #Param left x minimum of constructed Rect ## |
| #Param top y minimum of constructed Rect ## |
| #Param right x maximum of constructed Rect ## |
| #Param bottom y maximum of constructed Rect ## |
| |
| #Example |
| SkIRect rect = { 10, 20, 15, 25};
|
| rect.join(50, 60, 55, 65);
|
| SkDebugf("join: %d, %d, %d, %d\n", rect.fLeft, rect.fTop, rect.fRight, rect.fBottom);
|
| #StdOut |
| join: 10, 20, 55, 65 |
| ## |
| ## |
| |
| #SeeAlso set SkRect::join |
| |
| ## |
| |
| # ------------------------------------------------------------------------------ |
| |
| #Method void join(const SkIRect& r) |
| |
| Sets Rect to the union of itself and r. |
| |
| Has no effect if r is empty. Otherwise, if Rect is empty, sets Rect to r. |
| |
| #Param r expansion Rect ## |
| |
| #Example |
| SkIRect rect = { 10, 20, 15, 25};
|
| rect.join({50, 60, 55, 65});
|
| SkDebugf("join: %d, %d, %d, %d\n", rect.fLeft, rect.fTop, rect.fRight, rect.fBottom);
|
| #StdOut |
| join: 10, 20, 55, 65 |
| ## |
| ## |
| |
| #SeeAlso set SkRect::join |
| |
| ## |
| |
| # ------------------------------------------------------------------------------ |
| |
| #Method void sort() |
| |
| 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. |
| |
| #Example |
| SkIRect rect = { 30, 50, 20, 10 };
|
| SkDebugf("rect: %d, %d, %d, %d\n", rect.fLeft, rect.fTop, rect.fRight, rect.fBottom);
|
| rect.sort();
|
| SkDebugf("sorted: %d, %d, %d, %d\n", rect.fLeft, rect.fTop, rect.fRight, rect.fBottom);
|
| #StdOut |
| rect: 30, 50, 20, 10
|
| sorted: 20, 10, 30, 50 |
| ## |
| ## |
| |
| #SeeAlso makeSorted SkRect::sort |
| |
| ## |
| |
| # ------------------------------------------------------------------------------ |
| |
| #Method SkIRect makeSorted() const |
| |
| Returns Rect 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 IRect ## |
| |
| #Example |
| SkIRect rect = { 30, 50, 20, 10 };
|
| SkDebugf("rect: %d, %d, %d, %d\n", rect.fLeft, rect.fTop, rect.fRight, rect.fBottom);
|
| SkIRect sort = rect.makeSorted();
|
| SkDebugf("sorted: %d, %d, %d, %d\n", sort.fLeft, sort.fTop, sort.fRight, sort.fBottom);
|
| #StdOut |
| rect: 30, 50, 20, 10
|
| sorted: 20, 10, 30, 50 |
| ## |
| ## |
| |
| #SeeAlso sort SkRect::makeSorted |
| |
| ## |
| |
| # ------------------------------------------------------------------------------ |
| |
| #Method static const SkIRect& SK_WARN_UNUSED_RESULT EmptyIRect() |
| |
| Returns a reference to immutable empty IRect, set to (0, 0, 0, 0). |
| |
| #Return global IRect set to all zeroes ## |
| |
| #Example |
| const SkIRect& rect = SkIRect::EmptyIRect();
|
| SkDebugf("rect: %d, %d, %d, %d\n", rect.fLeft, rect.fTop, rect.fRight, rect.fBottom);
|
| #StdOut |
| rect: 0, 0, 0, 0 |
| ## |
| ## |
| |
| #SeeAlso MakeEmpty |
| |
| ## |
| |
| #Struct SkIRect ## |
| |
| #Topic IRect ## |