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impeller::RoundSuperellipseParam Struct Reference

#include <round_superellipse_param.h>

Classes

struct  Octant
 
struct  Quadrant
 

Public Member Functions

bool Contains (const Point &point) const
 
void Dispatch (PathReceiver &receiver) const
 

Static Public Member Functions

static RoundSuperellipseParam MakeBoundsRadii (const Rect &bounds, const RoundingRadii &radii)
 
static RoundSuperellipseParam MakeBoundsRadius (const Rect &bounds, Scalar radius)
 

Public Attributes

Quadrant top_right
 
Quadrant bottom_right
 
Quadrant bottom_left
 
Quadrant top_left
 
bool all_corners_same
 

Static Public Attributes

static constexpr Scalar kGapFactor = 0.29289321881f
 

Detailed Description

Definition at line 18 of file round_superellipse_param.h.

Member Function Documentation

◆ Contains()

bool impeller::RoundSuperellipseParam::Contains ( const Point &  point) const

Definition at line 554 of file round_superellipse_param.cc.

554 {
555 if (all_corners_same) {
556 return CornerContains(top_right, point, /*check_quadrant=*/false);
557 }
558 return CornerContains(top_right, point) &&
559 CornerContains(bottom_right, point) &&
560 CornerContains(bottom_left, point) && CornerContains(top_left, point);
561}
impeller::CornerContains
static bool CornerContains(const Point &p, const Point &corner, const Point &direction, const Size &radii)
Definition round_rect.cc:30

References all_corners_same, bottom_left, bottom_right, impeller::CornerContains(), top_left, and top_right.

Referenced by flutter::RSuperellipse::contains().

◆ Dispatch()

void impeller::RoundSuperellipseParam::Dispatch ( PathReceiver &  receiver) const

Definition at line 530 of file round_superellipse_param.cc.

530 {
531 RoundSuperellipseBuilder builder(path_receiver);
532
533 Point start = top_right.offset +
534 top_right.signed_scale *
535 (top_right.top.offset + Point(0, top_right.top.se_a));
536 path_receiver.MoveTo(start, true);
537
538 if (all_corners_same) {
539 builder.AddQuadrant(top_right, /*reverse=*/false, Point(1, 1));
540 builder.AddQuadrant(top_right, /*reverse=*/true, Point(1, -1));
541 builder.AddQuadrant(top_right, /*reverse=*/false, Point(-1, -1));
542 builder.AddQuadrant(top_right, /*reverse=*/true, Point(-1, 1));
543 } else {
544 builder.AddQuadrant(top_right, /*reverse=*/false);
545 builder.AddQuadrant(bottom_right, /*reverse=*/true);
546 builder.AddQuadrant(bottom_left, /*reverse=*/false);
547 builder.AddQuadrant(top_left, /*reverse=*/true);
548 }
549
550 path_receiver.LineTo(start);
551 path_receiver.Close();
552}
impeller::Point
TPoint< Scalar > Point
Definition point.h:327
start
const size_t start
Definition tessellator_libtess.cc:62

References all_corners_same, bottom_left, bottom_right, impeller::PathReceiver::Close(), impeller::PathReceiver::LineTo(), impeller::PathReceiver::MoveTo(), impeller::RoundSuperellipseParam::Octant::offset, impeller::RoundSuperellipseParam::Quadrant::offset, impeller::RoundSuperellipseParam::Octant::se_a, impeller::RoundSuperellipseParam::Quadrant::signed_scale, start, impeller::RoundSuperellipseParam::Quadrant::top, top_left, and top_right.

Referenced by flutter::DlPathBuilder::AddRoundSuperellipse().

◆ MakeBoundsRadii()

RoundSuperellipseParam impeller::RoundSuperellipseParam::MakeBoundsRadii ( const Rect &  bounds,
const RoundingRadii &  radii 
)
static

Definition at line 491 of file round_superellipse_param.cc.

493 {
494 if (radii.AreAllCornersSame() && !radii.top_left.IsEmpty()) {
495 // Having four empty corners indicate a rectangle, which needs special
496 // treatment on border containment and therefore is not `all_corners_same`.
497 return RoundSuperellipseParam{
498 .top_right = ComputeQuadrant(bounds.GetCenter(), bounds.GetRightTop(),
499 radii.top_right, {-1, 1}),
500 .all_corners_same = true,
501 };
502 }
503 Scalar top_split = Split(bounds.GetLeft(), bounds.GetRight(),
504 radii.top_left.width, radii.top_right.width);
505 Scalar right_split = Split(bounds.GetTop(), bounds.GetBottom(),
506 radii.top_right.height, radii.bottom_right.height);
507 Scalar bottom_split =
508 Split(bounds.GetLeft(), bounds.GetRight(), radii.bottom_left.width,
509 radii.bottom_right.width);
510 Scalar left_split = Split(bounds.GetTop(), bounds.GetBottom(),
511 radii.top_left.height, radii.bottom_left.height);
512
513 return RoundSuperellipseParam{
514 .top_right =
515 ComputeQuadrant(Point{top_split, right_split}, bounds.GetRightTop(),
516 radii.top_right, {1, -1}),
517 .bottom_right =
518 ComputeQuadrant(Point{bottom_split, right_split},
519 bounds.GetRightBottom(), radii.bottom_right, {1, 1}),
520 .bottom_left =
521 ComputeQuadrant(Point{bottom_split, left_split},
522 bounds.GetLeftBottom(), radii.bottom_left, {-1, 1}),
523 .top_left =
524 ComputeQuadrant(Point{top_split, left_split}, bounds.GetLeftTop(),
525 radii.top_left, {-1, -1}),
526 .all_corners_same = false,
527 };
528}
impeller::Scalar
float Scalar
Definition scalar.h:19

References impeller::RoundingRadii::AreAllCornersSame(), impeller::RoundingRadii::bottom_left, impeller::RoundingRadii::bottom_right, impeller::TRect< T >::GetBottom(), impeller::TRect< T >::GetCenter(), impeller::TRect< T >::GetLeft(), impeller::TRect< T >::GetLeftBottom(), impeller::TRect< T >::GetLeftTop(), impeller::TRect< T >::GetRight(), impeller::TRect< T >::GetRightBottom(), impeller::TRect< T >::GetRightTop(), impeller::TRect< T >::GetTop(), impeller::TSize< T >::height, impeller::TSize< T >::IsEmpty(), impeller::RoundingRadii::top_left, top_right, impeller::RoundingRadii::top_right, and impeller::TSize< T >::width.

Referenced by flutter::DlPathBuilder::AddRoundSuperellipse(), impeller::RoundSuperellipse::Contains(), impeller::RoundSuperellipsePathSource::Dispatch(), flutter::RSuperellipse::param(), and flutter::DisplayListMatrixClipState::TransformedRoundSuperellipseCoversBounds().

◆ MakeBoundsRadius()

RoundSuperellipseParam impeller::RoundSuperellipseParam::MakeBoundsRadius ( const Rect &  bounds,
Scalar  radius 
)
static

Definition at line 481 of file round_superellipse_param.cc.

483 {
484 return RoundSuperellipseParam{
485 .top_right = ComputeQuadrant(bounds.GetCenter(), bounds.GetRightTop(),
486 {radius, radius}, {-1, 1}),
487 .all_corners_same = true,
488 };
489}

References impeller::TRect< T >::GetCenter(), impeller::TRect< T >::GetRightTop(), and top_right.

Member Data Documentation

◆ all_corners_same

bool impeller::RoundSuperellipseParam::all_corners_same

Definition at line 95 of file round_superellipse_param.h.

Referenced by Contains(), and Dispatch().

◆ bottom_left

Quadrant impeller::RoundSuperellipseParam::bottom_left

Definition at line 91 of file round_superellipse_param.h.

Referenced by Contains(), and Dispatch().

◆ bottom_right

Quadrant impeller::RoundSuperellipseParam::bottom_right

Definition at line 90 of file round_superellipse_param.h.

Referenced by Contains(), and Dispatch().

◆ kGapFactor

constexpr Scalar impeller::RoundSuperellipseParam::kGapFactor = 0.29289321881f
staticconstexpr

Definition at line 127 of file round_superellipse_param.h.

◆ top_left

Quadrant impeller::RoundSuperellipseParam::top_left

Definition at line 92 of file round_superellipse_param.h.

Referenced by Contains(), and Dispatch().

◆ top_right

Quadrant impeller::RoundSuperellipseParam::top_right

Definition at line 89 of file round_superellipse_param.h.

Referenced by Contains(), Dispatch(), MakeBoundsRadii(), and MakeBoundsRadius().

The documentation for this struct was generated from the following files: