impeller::TextFrameDispatcher Class Reference

Performs a first pass over the display list to collect all text frames. More...

#include <dl_dispatcher.h>

Inheritance diagram for impeller::TextFrameDispatcher:

Public Member Functions
	TextFrameDispatcher (const ContentContext &renderer, const Matrix &initial_matrix)
void	save () override
void	saveLayer (const SkRect &bounds, const flutter::SaveLayerOptions options, const flutter::DlImageFilter *backdrop) override
void	restore () override
void	translate (SkScalar tx, SkScalar ty) override
void	scale (SkScalar sx, SkScalar sy) override
void	rotate (SkScalar degrees) override
void	skew (SkScalar sx, SkScalar sy) override
void	transform2DAffine (SkScalar mxx, SkScalar mxy, SkScalar mxt, SkScalar myx, SkScalar myy, SkScalar myt) override
void	transformFullPerspective (SkScalar mxx, SkScalar mxy, SkScalar mxz, SkScalar mxt, SkScalar myx, SkScalar myy, SkScalar myz, SkScalar myt, SkScalar mzx, SkScalar mzy, SkScalar mzz, SkScalar mzt, SkScalar mwx, SkScalar mwy, SkScalar mwz, SkScalar mwt) override
void	transformReset () override
void	drawTextFrame (const std::shared_ptr< impeller::TextFrame > &text_frame, SkScalar x, SkScalar y) override
void	drawDisplayList (const sk_sp< flutter::DisplayList > display_list, SkScalar opacity) override
void	setDrawStyle (flutter::DlDrawStyle style) override
void	setColor (flutter::DlColor color) override
void	setStrokeWidth (SkScalar width) override
void	setStrokeMiter (SkScalar limit) override
void	setStrokeCap (flutter::DlStrokeCap cap) override
void	setStrokeJoin (flutter::DlStrokeJoin join) override

Detailed Description

Performs a first pass over the display list to collect all text frames.

Definition at line 335 of file dl_dispatcher.h.

Constructor & Destructor Documentation

TextFrameDispatcher()

impeller::TextFrameDispatcher::TextFrameDispatcher	(	const ContentContext &	renderer,
		const Matrix &	initial_matrix
	)

Definition at line 1235 of file dl_dispatcher.cc.

    : renderer_(renderer), matrix_(initial_matrix) {}

Member Function Documentation

drawDisplayList()

void impeller::TextFrameDispatcher::drawDisplayList ( const sk_sp< flutter::DisplayList >  display_list, SkScalar  opacity  )

override

Definition at line 1325 of file dl_dispatcher.cc.

                      {
  [[maybe_unused]] size_t stack_depth = stack_.size();
  save();
  display_list->Dispatch(*this);
  restore();
  FML_DCHECK(stack_depth == stack_.size());
}

References restore(), and save().

drawTextFrame()

void impeller::TextFrameDispatcher::drawTextFrame ( const std::shared_ptr< impeller::TextFrame > &  text_frame, SkScalar  x, SkScalar  y  )

override

Definition at line 1301 of file dl_dispatcher.cc.

                {
  GlyphProperties properties;
  if (paint_.style == Paint::Style::kStroke) {
    properties.stroke = true;
    properties.stroke_cap = paint_.stroke_cap;
    properties.stroke_join = paint_.stroke_join;
    properties.stroke_miter = paint_.stroke_miter;
    properties.stroke_width = paint_.stroke_width;
  }
  if (text_frame->HasColor()) {
    properties.color = paint_.color;
  }
  auto scale =
      (matrix_ * Matrix::MakeTranslation(Point(x, y))).GetMaxBasisLengthXY();
  renderer_.GetLazyGlyphAtlas()->AddTextFrame(*text_frame,  //
                                              scale,        //
                                              Point(x, y),  //
                                              properties    //
  );
}

References impeller::GlyphProperties::color, impeller::Paint::color, impeller::ContentContext::GetLazyGlyphAtlas(), impeller::Paint::kStroke, impeller::Matrix::MakeTranslation(), scale(), impeller::GlyphProperties::stroke, impeller::GlyphProperties::stroke_cap, impeller::Paint::stroke_cap, impeller::GlyphProperties::stroke_join, impeller::Paint::stroke_join, impeller::GlyphProperties::stroke_miter, impeller::Paint::stroke_miter, impeller::GlyphProperties::stroke_width, impeller::Paint::stroke_width, and impeller::Paint::style.

restore()

void impeller::TextFrameDispatcher::restore ( )

override

Definition at line 1249 of file dl_dispatcher.cc.

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

Referenced by drawDisplayList().

rotate()

void impeller::TextFrameDispatcher::rotate ( SkScalar  degrees )

override

Definition at line 1262 of file dl_dispatcher.cc.

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

References impeller::Matrix::MakeRotationZ().

save()

void impeller::TextFrameDispatcher::save ( )

override

Definition at line 1239 of file dl_dispatcher.cc.

                               {
  stack_.emplace_back(matrix_);
}

Referenced by drawDisplayList(), and saveLayer().

saveLayer()

void impeller::TextFrameDispatcher::saveLayer ( const SkRect &  bounds, const flutter::SaveLayerOptions  options, const flutter::DlImageFilter *  backdrop  )

override

Definition at line 1243 of file dl_dispatcher.cc.

                                                                          {
  save();
}

References save().

scale()

void impeller::TextFrameDispatcher::scale ( SkScalar  sx, SkScalar  sy  )

override

Definition at line 1258 of file dl_dispatcher.cc.

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

References impeller::Matrix::Scale().

Referenced by drawTextFrame().

setColor()

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

override

Definition at line 1341 of file dl_dispatcher.cc.

                                                       {
  paint_.color = {
      color.getRedF(),
      color.getGreenF(),
      color.getBlueF(),
      color.getAlphaF(),
  };
}

References color, and impeller::Paint::color.

setDrawStyle()

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

override

Definition at line 1336 of file dl_dispatcher.cc.

                                                               {
  paint_.style = ToStyle(style);
}

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

setStrokeCap()

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

override

Definition at line 1361 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::kButt, impeller::kRound, impeller::kSquare, and impeller::Paint::stroke_cap.

setStrokeJoin()

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

override

Definition at line 1376 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::kBevel, impeller::kMiter, impeller::kRound, and impeller::Paint::stroke_join.

setStrokeMiter()

void impeller::TextFrameDispatcher::setStrokeMiter ( SkScalar  limit )

override

Definition at line 1356 of file dl_dispatcher.cc.

                                                       {
  paint_.stroke_miter = limit;
}

References impeller::Paint::stroke_miter.

setStrokeWidth()

void impeller::TextFrameDispatcher::setStrokeWidth ( SkScalar  width )

override

Definition at line 1351 of file dl_dispatcher.cc.

                                                       {
  paint_.stroke_width = width;
}

References impeller::Paint::stroke_width.

skew()

void impeller::TextFrameDispatcher::skew ( SkScalar  sx, SkScalar  sy  )

override

Definition at line 1266 of file dl_dispatcher.cc.

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

References impeller::Matrix::MakeSkew().

transform2DAffine()

void impeller::TextFrameDispatcher::transform2DAffine ( SkScalar  mxx, SkScalar  mxy, SkScalar  mxt, SkScalar  myx, SkScalar  myy, SkScalar  myt  )

override

Definition at line 1272 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::TextFrameDispatcher::transformFullPerspective ( SkScalar  mxx, SkScalar  mxy, SkScalar  mxz, SkScalar  mxt, SkScalar  myx, SkScalar  myy, SkScalar  myz, SkScalar  myt, SkScalar  mzx, SkScalar  mzy, SkScalar  mzz, SkScalar  mzt, SkScalar  mwx, SkScalar  mwy, SkScalar  mwz, SkScalar  mwt  )

override

Definition at line 1283 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::TextFrameDispatcher::transformReset ( )

override

Definition at line 1297 of file dl_dispatcher.cc.

                                         {
  matrix_ = Matrix();
}

translate()

void impeller::TextFrameDispatcher::translate ( SkScalar  tx, SkScalar  ty  )

override

Definition at line 1254 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