Flutter Impeller
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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 550 of file round_superellipse_param.cc.

550  {
551  if (all_corners_same) {
552  return CornerContains(top_right, point, /*check_quadrant=*/false);
553  }
554  return CornerContains(top_right, point) &&
555  CornerContains(bottom_right, point) &&
556  CornerContains(bottom_left, point) && CornerContains(top_left, point);
557 }
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.

◆ Dispatch()

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

Definition at line 526 of file round_superellipse_param.cc.

526  {
527  RoundSuperellipseBuilder builder(path_receiver);
528 
529  Point start = top_right.offset +
530  top_right.signed_scale *
531  (top_right.top.offset + Point(0, top_right.top.se_a));
532  path_receiver.MoveTo(start, true);
533 
534  if (all_corners_same) {
535  builder.AddQuadrant(top_right, /*reverse=*/false, Point(1, 1));
536  builder.AddQuadrant(top_right, /*reverse=*/true, Point(1, -1));
537  builder.AddQuadrant(top_right, /*reverse=*/false, Point(-1, -1));
538  builder.AddQuadrant(top_right, /*reverse=*/true, Point(-1, 1));
539  } else {
540  builder.AddQuadrant(top_right, /*reverse=*/false);
541  builder.AddQuadrant(bottom_right, /*reverse=*/true);
542  builder.AddQuadrant(bottom_left, /*reverse=*/false);
543  builder.AddQuadrant(top_left, /*reverse=*/true);
544  }
545 
546  path_receiver.LineTo(start);
547  path_receiver.Close();
548 }
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 impeller::testing::TEST().

◆ MakeBoundsRadii()

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

Definition at line 487 of file round_superellipse_param.cc.

489  {
490  if (radii.AreAllCornersSame() && !radii.top_left.IsEmpty()) {
491  // Having four empty corners indicate a rectangle, which needs special
492  // treatment on border containment and therefore is not `all_corners_same`.
493  return RoundSuperellipseParam{
494  .top_right = ComputeQuadrant(bounds.GetCenter(), bounds.GetRightTop(),
495  radii.top_right, {-1, 1}),
496  .all_corners_same = true,
497  };
498  }
499  Scalar top_split = Split(bounds.GetLeft(), bounds.GetRight(),
500  radii.top_left.width, radii.top_right.width);
501  Scalar right_split = Split(bounds.GetTop(), bounds.GetBottom(),
502  radii.top_right.height, radii.bottom_right.height);
503  Scalar bottom_split =
504  Split(bounds.GetLeft(), bounds.GetRight(), radii.bottom_left.width,
505  radii.bottom_right.width);
506  Scalar left_split = Split(bounds.GetTop(), bounds.GetBottom(),
507  radii.top_left.height, radii.bottom_left.height);
508 
509  return RoundSuperellipseParam{
510  .top_right =
511  ComputeQuadrant(Point{top_split, right_split}, bounds.GetRightTop(),
512  radii.top_right, {1, -1}),
513  .bottom_right =
514  ComputeQuadrant(Point{bottom_split, right_split},
515  bounds.GetRightBottom(), radii.bottom_right, {1, 1}),
516  .bottom_left =
517  ComputeQuadrant(Point{bottom_split, left_split},
518  bounds.GetLeftBottom(), radii.bottom_left, {-1, 1}),
519  .top_left =
520  ComputeQuadrant(Point{top_split, left_split}, bounds.GetLeftTop(),
521  radii.top_left, {-1, -1}),
522  .all_corners_same = false,
523  };
524 }
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 impeller::RoundSuperellipse::Contains(), impeller::RoundSuperellipsePathSource::Dispatch(), and impeller::testing::TEST().

◆ MakeBoundsRadius()

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

Definition at line 477 of file round_superellipse_param.cc.

479  {
480  return RoundSuperellipseParam{
481  .top_right = ComputeQuadrant(bounds.GetCenter(), bounds.GetRightTop(),
482  {radius, radius}, {-1, 1}),
483  .all_corners_same = true,
484  };
485 }

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: