#include <dl_dispatcher.h>

Inheritance diagram for impeller::FirstPassDispatcher:

Public Member Functions
	FirstPassDispatcher (const ContentContext &renderer, const Matrix &initial_matrix, const Rect cull_rect)

	~FirstPassDispatcher ()

void	save () override

void	saveLayer (const DlRect &bounds, const flutter::SaveLayerOptions options, const flutter::DlImageFilter *backdrop, std::optional< int64_t > backdrop_id) override

void	restore () override

void	translate (DlScalar tx, DlScalar ty) override

void	scale (DlScalar sx, DlScalar sy) override

void	rotate (DlScalar degrees) override

void	skew (DlScalar sx, DlScalar sy) override

void	transform2DAffine (DlScalar mxx, DlScalar mxy, DlScalar mxt, DlScalar myx, DlScalar myy, DlScalar myt) override

void	transformFullPerspective (DlScalar mxx, DlScalar mxy, DlScalar mxz, DlScalar mxt, DlScalar myx, DlScalar myy, DlScalar myz, DlScalar myt, DlScalar mzx, DlScalar mzy, DlScalar mzz, DlScalar mzt, DlScalar mwx, DlScalar mwy, DlScalar mwz, DlScalar mwt) override

void	transformReset () override

void	drawText (const std::shared_ptr< flutter::DlText > &text, DlScalar x, DlScalar y) override

void	drawDisplayList (const sk_sp< flutter::DisplayList > display_list, DlScalar opacity) override

void	setDrawStyle (flutter::DlDrawStyle style) override

void	setColor (flutter::DlColor color) override

void	setStrokeWidth (DlScalar width) override

void	setStrokeMiter (DlScalar limit) override

void	setStrokeCap (flutter::DlStrokeCap cap) override

void	setStrokeJoin (flutter::DlStrokeJoin join) override

void	setImageFilter (const flutter::DlImageFilter *filter) override

std::pair< std::unordered_map< int64_t, BackdropData >, size_t >	TakeBackdropData ()

Public Member Functions inherited from flutter::IgnoreAttributeDispatchHelper
void	setAntiAlias (bool aa) override

void	setInvertColors (bool invert) override

void	setStrokeCap (DlStrokeCap cap) override

void	setStrokeJoin (DlStrokeJoin join) override

void	setDrawStyle (DlDrawStyle style) override

void	setStrokeWidth (float width) override

void	setStrokeMiter (float limit) override

void	setColor (DlColor color) override

void	setBlendMode (DlBlendMode mode) override

void	setColorSource (const DlColorSource *source) override

void	setImageFilter (const DlImageFilter *filter) override

void	setColorFilter (const DlColorFilter *filter) override

void	setMaskFilter (const DlMaskFilter *filter) override

Public Member Functions inherited from flutter::DlOpReceiver
virtual void	save (uint32_t total_content_depth)

virtual void	saveLayer (const DlRect &bounds, const SaveLayerOptions &options, uint32_t total_content_depth, DlBlendMode max_content_blend_mode, const DlImageFilter *backdrop=nullptr, std::optional< int64_t > backdrop_id=std::nullopt)

virtual void	saveLayer (const DlRect bounds, const SaveLayerOptions options, const DlImageFilter backdrop=nullptr, std::optional< int64_t > backdrop_id=std::nullopt) final

Public Member Functions inherited from flutter::IgnoreDrawDispatchHelper
void	save () override

void	saveLayer (const DlRect &bounds, const SaveLayerOptions options, const DlImageFilter *backdrop, std::optional< int64_t > backdrop_id) override

void	restore () override

void	drawColor (DlColor color, DlBlendMode mode) override

void	drawPaint () override

void	drawLine (const DlPoint &p0, const DlPoint &p1) override

void	drawDashedLine (const DlPoint &p0, const DlPoint &p1, DlScalar on_length, DlScalar off_length) override

void	drawRect (const DlRect &rect) override

void	drawOval (const DlRect &bounds) override

void	drawCircle (const DlPoint &center, DlScalar radius) override

void	drawRoundRect (const DlRoundRect &rrect) override

void	drawDiffRoundRect (const DlRoundRect &outer, const DlRoundRect &inner) override

void	drawRoundSuperellipse (const DlRoundSuperellipse &rse) override

void	drawPath (const DlPath &path) override

void	drawArc (const DlRect &oval_bounds, DlScalar start_degrees, DlScalar sweep_degrees, bool use_center) override

void	drawPoints (DlPointMode mode, uint32_t count, const DlPoint points[]) override

void	drawVertices (const std::shared_ptr< DlVertices > &vertices, DlBlendMode mode) override

void	drawImage (const sk_sp< DlImage > image, const DlPoint &point, DlImageSampling sampling, bool render_with_attributes) override

void	drawImageRect (const sk_sp< DlImage > image, const DlRect &src, const DlRect &dst, DlImageSampling sampling, bool render_with_attributes, DlSrcRectConstraint constraint) override

void	drawImageNine (const sk_sp< DlImage > image, const DlIRect &center, const DlRect &dst, DlFilterMode filter, bool render_with_attributes) override

void	drawAtlas (const sk_sp< DlImage > atlas, const DlRSTransform xform[], const DlRect tex[], const DlColor colors[], int count, DlBlendMode mode, DlImageSampling sampling, const DlRect *cull_rect, bool render_with_attributes) override

void	drawDisplayList (const sk_sp< DisplayList > display_list, DlScalar opacity) override

void	drawText (const std::shared_ptr< DlText > &text, DlScalar x, DlScalar y) override

void	drawShadow (const DlPath &path, const DlColor color, const DlScalar elevation, bool transparent_occluder, DlScalar dpr) override

Additional Inherited Members
Static Public Attributes inherited from flutter::DlOpReceiver
static constexpr int	kMaxDrawPointsCount = ((1 << 29) - 1)

Detailed Description

Performs a first pass over the display list to collect infomation. Collects things like text frames and backdrop filters.

Definition at line 311 of file dl_dispatcher.h.

Constructor & Destructor Documentation

◆ FirstPassDispatcher()

impeller::FirstPassDispatcher::FirstPassDispatcher	(	const ContentContext &	renderer,
		const Matrix &	initial_matrix,
		const Rect	cull_rect
	)

Definition at line 966 of file dl_dispatcher.cc.

    : renderer_(renderer), matrix_(initial_matrix) {
  cull_rect_state_.push_back(cull_rect);
}

◆ ~FirstPassDispatcher()

impeller::FirstPassDispatcher::~FirstPassDispatcher ( )

Definition at line 973 of file dl_dispatcher.cc.

                                          {
  FML_DCHECK(cull_rect_state_.size() == 1);
}

References FML_DCHECK.

Member Function Documentation

◆ drawDisplayList()

void impeller::FirstPassDispatcher::drawDisplayList	(	const sk_sp< flutter::DisplayList >	display_list,
		DlScalar	opacity
	)

overridevirtual

Implements flutter::DlOpReceiver.

Definition at line 1120 of file dl_dispatcher.cc.

                      {
  [[maybe_unused]] size_t stack_depth = stack_.size();
  save();
  Paint old_paint = paint_;
  paint_ = Paint{};
  bool old_has_image_filter = has_image_filter_;
  has_image_filter_ = false;
 
  if (matrix_.HasPerspective()) {
    display_list->Dispatch(*this);
  } else {
    Rect local_cull_bounds = GetCurrentLocalCullingBounds();
    if (local_cull_bounds.IsMaximum()) {
      display_list->Dispatch(*this);
    } else if (!local_cull_bounds.IsEmpty()) {
      DlIRect cull_rect = DlIRect::RoundOut(local_cull_bounds);
      display_list->Dispatch(*this, cull_rect);
    }
  }
 
  restore();
  paint_ = old_paint;
  has_image_filter_ = old_has_image_filter;
  FML_DCHECK(stack_depth == stack_.size());
}

References FML_DCHECK, impeller::Matrix::HasPerspective(), impeller::TRect< T >::IsEmpty(), impeller::TRect< T >::IsMaximum(), restore(), impeller::TRect< T >::RoundOut(), and save().

◆ drawText()

void impeller::FirstPassDispatcher::drawText	(	const std::shared_ptr< flutter::DlText > &	text,
		DlScalar	x,
		DlScalar	y
	)

overridevirtual

Implements flutter::DlOpReceiver.

Definition at line 1079 of file dl_dispatcher.cc.

                                               {
  GlyphProperties properties;
  auto text_frame = text->GetTextFrame();
  if (text_frame == nullptr) {
    return;
  }
 
  if (paint_.style == Paint::Style::kStroke) {
    properties.stroke = paint_.stroke;
  }
 
  if (text_frame->HasColor()) {
    // Alpha is always applied when rendering, remove it here so
    // we do not double-apply the alpha.
    properties.color = paint_.color.WithAlpha(1.0);
  }
  auto scale = TextFrame::RoundScaledFontSize(
      (matrix_ * Matrix::MakeTranslation(Point(x, y))).GetMaxBasisLengthXY());
 
  renderer_.GetLazyGlyphAtlas()->AddTextFrame(
      text_frame,   //
      scale,        //
      Point(x, y),  //
      matrix_,
      (properties.stroke.has_value() || text_frame->HasColor())  //
          ? std::optional<GlyphProperties>(properties)           //
          : std::nullopt                                         //
  );
}

References impeller::Paint::color, impeller::GlyphProperties::color, impeller::ContentContext::GetLazyGlyphAtlas(), impeller::Paint::kStroke, impeller::Matrix::MakeTranslation(), impeller::TextFrame::RoundScaledFontSize(), scale(), impeller::Paint::stroke, impeller::GlyphProperties::stroke, impeller::Paint::style, text, impeller::Color::WithAlpha(), x, and y.

◆ restore()

void impeller::FirstPassDispatcher::restore ( )

overridevirtual

Implements flutter::DlOpReceiver.

Definition at line 1023 of file dl_dispatcher.cc.

                                  {
  matrix_ = stack_.back();
  stack_.pop_back();
  cull_rect_state_.pop_back();
}

Referenced by drawDisplayList().

◆ rotate()

void impeller::FirstPassDispatcher::rotate ( DlScalar degrees )

overridevirtual

Implements flutter::DlOpReceiver.

Definition at line 1037 of file dl_dispatcher.cc.

                                                 {
  matrix_ = matrix_ * Matrix::MakeRotationZ(Degrees(degrees));
}

References impeller::Matrix::MakeRotationZ().

◆ save()

void impeller::FirstPassDispatcher::save ( )

overridevirtual

Implements flutter::DlOpReceiver.

Definition at line 977 of file dl_dispatcher.cc.

                               {
  stack_.emplace_back(matrix_);
  cull_rect_state_.push_back(cull_rect_state_.back());
}

Referenced by drawDisplayList(), and saveLayer().

◆ saveLayer()

void impeller::FirstPassDispatcher::saveLayer	(	const DlRect &	bounds,
		const flutter::SaveLayerOptions	options,
		const flutter::DlImageFilter *	backdrop,
		std::optional< int64_t >	backdrop_id
	)

overridevirtual

Implements flutter::DlOpReceiver.

Definition at line 982 of file dl_dispatcher.cc.

                                                                      {
  save();
 
  backdrop_count_ += (backdrop == nullptr ? 0 : 1);
  if (backdrop != nullptr && backdrop_id.has_value()) {
    std::shared_ptr<flutter::DlImageFilter> shared_backdrop =
        backdrop->shared();
    std::unordered_map<int64_t, BackdropData>::iterator existing =
        backdrop_data_.find(backdrop_id.value());
    if (existing == backdrop_data_.end()) {
      backdrop_data_[backdrop_id.value()] =
          BackdropData{.backdrop_count = 1, .last_backdrop = shared_backdrop};
    } else {
      BackdropData& data = existing->second;
      data.backdrop_count++;
      if (data.all_filters_equal) {
        data.all_filters_equal = (*data.last_backdrop == *shared_backdrop);
        data.last_backdrop = shared_backdrop;
      }
    }
  }
 
  // This dispatcher does not track enough state to accurately compute
  // cull rects with image filters.
  auto global_cull_rect = cull_rect_state_.back();
  if (has_image_filter_ || global_cull_rect.IsMaximum()) {
    cull_rect_state_.back() = Rect::MakeMaximum();
  } else {
    auto global_save_bounds = bounds.TransformBounds(matrix_);
    auto new_cull_rect = global_cull_rect.Intersection(global_save_bounds);
    if (new_cull_rect.has_value()) {
      cull_rect_state_.back() = new_cull_rect.value();
    } else {
      cull_rect_state_.back() = Rect::MakeLTRB(0, 0, 0, 0);
    }
  }
}

References impeller::BackdropData::backdrop_count, data, impeller::TRect< T >::Intersection(), impeller::TRect< Scalar >::MakeLTRB(), impeller::TRect< Scalar >::MakeMaximum(), save(), flutter::DlAttribute< D, T >::shared(), and impeller::TRect< T >::TransformBounds().

◆ scale()

void impeller::FirstPassDispatcher::scale	(	DlScalar	sx,
		DlScalar	sy
	)

overridevirtual

Implements flutter::DlOpReceiver.

Definition at line 1033 of file dl_dispatcher.cc.

                                                        {
  matrix_ = matrix_.Scale({sx, sy, 1.0f});
}

References impeller::Matrix::Scale().

Referenced by drawText().

◆ setColor()

void impeller::FirstPassDispatcher::setColor ( flutter::DlColor color )

overridevirtual

Implements flutter::DlOpReceiver.

Definition at line 1154 of file dl_dispatcher.cc.

                                                       {
  paint_.color = skia_conversions::ToColor(color);
}

References impeller::Paint::color, and impeller::skia_conversions::ToColor().

◆ setDrawStyle()

void impeller::FirstPassDispatcher::setDrawStyle ( flutter::DlDrawStyle style )

overridevirtual

Implements flutter::DlOpReceiver.

Definition at line 1149 of file dl_dispatcher.cc.

                                                               {
  paint_.style = ToStyle(style);
}

References impeller::Paint::style, and impeller::ToStyle().

◆ setImageFilter()

void impeller::FirstPassDispatcher::setImageFilter ( const flutter::DlImageFilter * filter )

overridevirtual

Implements flutter::DlOpReceiver.

Definition at line 1199 of file dl_dispatcher.cc.

                                                                           {
  if (filter == nullptr) {
    has_image_filter_ = false;
  } else {
    has_image_filter_ = true;
  }
}

◆ setStrokeCap()

void impeller::FirstPassDispatcher::setStrokeCap ( flutter::DlStrokeCap cap )

overridevirtual

Implements flutter::DlOpReceiver.

Definition at line 1169 of file dl_dispatcher.cc.

                                                             {
  switch (cap) {
    case flutter::DlStrokeCap::kButt:
      paint_.stroke.cap = Cap::kButt;
      break;
    case flutter::DlStrokeCap::kRound:
      paint_.stroke.cap = Cap::kRound;
      break;
    case flutter::DlStrokeCap::kSquare:
      paint_.stroke.cap = Cap::kSquare;
      break;
  }
}

References impeller::StrokeParameters::cap, flutter::kButt, impeller::kButt, flutter::kRound, impeller::kRound, flutter::kSquare, impeller::kSquare, and impeller::Paint::stroke.

◆ setStrokeJoin()

void impeller::FirstPassDispatcher::setStrokeJoin ( flutter::DlStrokeJoin join )

overridevirtual

Implements flutter::DlOpReceiver.

Definition at line 1184 of file dl_dispatcher.cc.

                                                                {
  switch (join) {
    case flutter::DlStrokeJoin::kMiter:
      paint_.stroke.join = Join::kMiter;
      break;
    case flutter::DlStrokeJoin::kRound:
      paint_.stroke.join = Join::kRound;
      break;
    case flutter::DlStrokeJoin::kBevel:
      paint_.stroke.join = Join::kBevel;
      break;
  }
}

References impeller::StrokeParameters::join, flutter::kBevel, impeller::kBevel, flutter::kMiter, impeller::kMiter, flutter::kRound, impeller::kRound, and impeller::Paint::stroke.

◆ setStrokeMiter()

void impeller::FirstPassDispatcher::setStrokeMiter ( DlScalar limit )

overridevirtual

Implements flutter::DlOpReceiver.

Definition at line 1164 of file dl_dispatcher.cc.

                                                       {
  paint_.stroke.miter_limit = limit;
}

References impeller::StrokeParameters::miter_limit, and impeller::Paint::stroke.

◆ setStrokeWidth()

void impeller::FirstPassDispatcher::setStrokeWidth ( DlScalar width )

overridevirtual

Implements flutter::DlOpReceiver.

Definition at line 1159 of file dl_dispatcher.cc.

                                                       {
  paint_.stroke.width = width;
}

References impeller::Paint::stroke, impeller::StrokeParameters::width, and width.

◆ skew()

void impeller::FirstPassDispatcher::skew	(	DlScalar	sx,
		DlScalar	sy
	)

overridevirtual

Implements flutter::DlOpReceiver.

Definition at line 1041 of file dl_dispatcher.cc.

                                                       {
  matrix_ = matrix_ * Matrix::MakeSkew(sx, sy);
}

References impeller::Matrix::MakeSkew().

◆ TakeBackdropData()

std::pair< std::unordered_map< int64_t, BackdropData >, size_t > impeller::FirstPassDispatcher::TakeBackdropData ( )

Definition at line 1208 of file dl_dispatcher.cc.

                                      {
  std::unordered_map<int64_t, BackdropData> temp;
  std::swap(temp, backdrop_data_);
  return std::make_pair(temp, backdrop_count_);
}

Referenced by impeller::DisplayListToTexture(), and impeller::RenderToTarget().

◆ transform2DAffine()

void impeller::FirstPassDispatcher::transform2DAffine	(	DlScalar	mxx,
		DlScalar	mxy,
		DlScalar	mxt,
		DlScalar	myx,
		DlScalar	myy,
		DlScalar	myt
	)

overridevirtual

Implements flutter::DlOpReceiver.

Definition at line 1047 of file dl_dispatcher.cc.

                                              {
  matrix_ = matrix_ * Matrix::MakeColumn(
      mxx,  myx,  0.0f, 0.0f,
      mxy,  myy,  0.0f, 0.0f,
      0.0f, 0.0f, 1.0f, 0.0f,
      mxt,  myt,  0.0f, 1.0f
  );
}

References impeller::Matrix::MakeColumn().

◆ transformFullPerspective()

void impeller::FirstPassDispatcher::transformFullPerspective	(	DlScalar	mxx,
		DlScalar	mxy,
		DlScalar	mxz,
		DlScalar	mxt,
		DlScalar	myx,
		DlScalar	myy,
		DlScalar	myz,
		DlScalar	myt,
		DlScalar	mzx,
		DlScalar	mzy,
		DlScalar	mzz,
		DlScalar	mzt,
		DlScalar	mwx,
		DlScalar	mwy,
		DlScalar	mwz,
		DlScalar	mwt
	)

overridevirtual

Implements flutter::DlOpReceiver.

Definition at line 1061 of file dl_dispatcher.cc.

                                                            {
  matrix_ = matrix_ * Matrix::MakeColumn(
      mxx, myx, mzx, mwx,
      mxy, myy, mzy, mwy,
      mxz, myz, mzz, mwz,
      mxt, myt, mzt, mwt
  );
}

References impeller::Matrix::MakeColumn().

◆ transformReset()

void impeller::FirstPassDispatcher::transformReset ( )

overridevirtual

Implements flutter::DlOpReceiver.

Definition at line 1075 of file dl_dispatcher.cc.

                                         {
  matrix_ = Matrix();
}

◆ translate()

void impeller::FirstPassDispatcher::translate	(	DlScalar	tx,
		DlScalar	ty
	)

overridevirtual

Implements flutter::DlOpReceiver.

Definition at line 1029 of file dl_dispatcher.cc.

                                                            {
  matrix_ = matrix_.Translate({tx, ty});
}

References impeller::Matrix::Translate().

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

impeller/display_list/dl_dispatcher.h
impeller/display_list/dl_dispatcher.cc

Public Member Functions

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ FirstPassDispatcher()

◆ ~FirstPassDispatcher()

Member Function Documentation

◆ drawDisplayList()

◆ drawText()

◆ restore()

◆ rotate()

◆ save()

◆ saveLayer()

◆ scale()

◆ setColor()

◆ setDrawStyle()

◆ setImageFilter()

◆ setStrokeCap()

◆ setStrokeJoin()

◆ setStrokeMiter()

◆ setStrokeWidth()

◆ skew()

◆ TakeBackdropData()

◆ transform2DAffine()

◆ transformFullPerspective()

◆ transformReset()

◆ translate()