flutter::Canvas Class Reference

#include <canvas.h>

Inheritance diagram for flutter::Canvas:

Public Member Functions
	~Canvas () override
void	save ()
void	saveLayerWithoutBounds (Dart_Handle paint_objects, Dart_Handle paint_data)
void	saveLayer (double left, double top, double right, double bottom, Dart_Handle paint_objects, Dart_Handle paint_data)
void	restore ()
int	getSaveCount ()
void	restoreToCount (int count)
void	translate (double dx, double dy)
void	scale (double sx, double sy)
void	rotate (double radians)
void	skew (double sx, double sy)
void	transform (const tonic::Float64List &matrix4)
void	getTransform (Dart_Handle matrix4_handle)
void	clipRect (double left, double top, double right, double bottom, DlClipOp clipOp, bool doAntiAlias=true)
void	clipRRect (const RRect &rrect, bool doAntiAlias=true)
void	clipRSuperellipse (const RSuperellipse *rse, bool doAntiAlias=true)
void	clipPath (const CanvasPath *path, bool doAntiAlias=true)
void	getDestinationClipBounds (Dart_Handle rect_handle)
void	getLocalClipBounds (Dart_Handle rect_handle)
void	drawColor (uint32_t color, DlBlendMode blend_mode)
void	drawLine (double x1, double y1, double x2, double y2, Dart_Handle paint_objects, Dart_Handle paint_data)
void	drawPaint (Dart_Handle paint_objects, Dart_Handle paint_data)
void	drawRect (double left, double top, double right, double bottom, Dart_Handle paint_objects, Dart_Handle paint_data)
void	drawRRect (const RRect &rrect, Dart_Handle paint_objects, Dart_Handle paint_data)
void	drawDRRect (const RRect &outer, const RRect &inner, Dart_Handle paint_objects, Dart_Handle paint_data)
void	drawRSuperellipse (const RSuperellipse *rse, Dart_Handle paint_objects, Dart_Handle paint_data)
void	drawOval (double left, double top, double right, double bottom, Dart_Handle paint_objects, Dart_Handle paint_data)
void	drawCircle (double x, double y, double radius, Dart_Handle paint_objects, Dart_Handle paint_data)
void	drawArc (double left, double top, double right, double bottom, double startAngle, double sweepAngle, bool useCenter, Dart_Handle paint_objects, Dart_Handle paint_data)
void	drawPath (const CanvasPath *path, Dart_Handle paint_objects, Dart_Handle paint_data)
Dart_Handle	drawImage (const CanvasImage *image, double x, double y, Dart_Handle paint_objects, Dart_Handle paint_data, int filterQualityIndex)
Dart_Handle	drawImageRect (const CanvasImage *image, double src_left, double src_top, double src_right, double src_bottom, double dst_left, double dst_top, double dst_right, double dst_bottom, Dart_Handle paint_objects, Dart_Handle paint_data, int filterQualityIndex)
Dart_Handle	drawImageNine (const CanvasImage *image, double center_left, double center_top, double center_right, double center_bottom, double dst_left, double dst_top, double dst_right, double dst_bottom, Dart_Handle paint_objects, Dart_Handle paint_data, int bitmapSamplingIndex)
void	drawPicture (Picture *picture)
void	drawPoints (Dart_Handle paint_objects, Dart_Handle paint_data, DlPointMode point_mode, const tonic::Float32List &points)
void	drawVertices (const Vertices *vertices, DlBlendMode blend_mode, Dart_Handle paint_objects, Dart_Handle paint_data)
Dart_Handle	drawAtlas (Dart_Handle paint_objects, Dart_Handle paint_data, int filterQualityIndex, CanvasImage *atlas, Dart_Handle transforms_handle, Dart_Handle rects_handle, Dart_Handle colors_handle, DlBlendMode blend_mode, Dart_Handle cull_rect_handle)
void	drawShadow (const CanvasPath *path, uint32_t color, double elevation, bool transparentOccluder)
void	Invalidate ()
DisplayListBuilder *	builder ()
Public Member Functions inherited from flutter::RefCountedDartWrappable< Canvas >
virtual void	RetainDartWrappableReference () const override
virtual void	ReleaseDartWrappableReference () const override
Public Member Functions inherited from fml::RefCountedThreadSafe< T >
void	Release () const
Public Member Functions inherited from fml::internal::RefCountedThreadSafeBase
void	AddRef () const
bool	HasOneRef () const
void	AssertHasOneRef () const
Public Member Functions inherited from tonic::DartWrappable
	DartWrappable ()
virtual const DartWrapperInfo &	GetDartWrapperInfo () const =0
Dart_Handle	CreateDartWrapper (DartState *dart_state)
void	AssociateWithDartWrapper (Dart_Handle wrappable)
void	ClearDartWrapper ()
Dart_WeakPersistentHandle	dart_wrapper () const

Static Public Member Functions
static void	Create (Dart_Handle wrapper, PictureRecorder *recorder, double left, double top, double right, double bottom)

Additional Inherited Members
Public Types inherited from tonic::DartWrappable
enum	DartNativeFields {   kPeerIndex ,   kNumberOfNativeFields }
Protected Member Functions inherited from fml::RefCountedThreadSafe< T >
	RefCountedThreadSafe ()
	~RefCountedThreadSafe ()
Protected Member Functions inherited from fml::internal::RefCountedThreadSafeBase
	RefCountedThreadSafeBase ()
	~RefCountedThreadSafeBase ()
bool	Release () const
void	Adopt ()
Protected Member Functions inherited from tonic::DartWrappable
virtual	~DartWrappable ()
Static Protected Member Functions inherited from tonic::DartWrappable
static Dart_PersistentHandle	GetTypeForWrapper (tonic::DartState *dart_state, const tonic::DartWrapperInfo &wrapper_info)

Detailed Description

Definition at line 22 of file canvas.h.

Constructor & Destructor Documentation

~Canvas()

flutter::Canvas::~Canvas ( )

override

References clipPath(), clipRect(), clipRRect(), clipRSuperellipse(), drawArc(), drawAtlas(), drawCircle(), drawColor(), drawDRRect(), drawImage(), drawImageNine(), drawImageRect(), drawLine(), drawOval(), drawPaint(), drawPath(), drawPicture(), drawPoints(), drawRect(), drawRRect(), drawRSuperellipse(), drawShadow(), drawVertices(), getDestinationClipBounds(), getLocalClipBounds(), getSaveCount(), getTransform(), Invalidate(), restore(), restoreToCount(), rotate(), save(), saveLayer(), saveLayerWithoutBounds(), scale(), skew(), and translate().

Member Function Documentation

builder()

DisplayListBuilder * flutter::Canvas::builder ( )

inline

Definition at line 195 of file canvas.h.

{ return display_list_builder_.get(); }

clipPath()

void flutter::Canvas::clipPath	(	const CanvasPath *	path,
		bool	doAntiAlias = true
	)

Definition at line 187 of file canvas.cc.

                                                              {
  if (!path) {
    Dart_ThrowException(
        ToDart("Canvas.clipPath called with non-genuine Path."));
    return;
  }
  if (display_list_builder_) {
    builder()->ClipPath(path->path(), DlClipOp::kIntersect, doAntiAlias);
  }
}

References flutter::path.

Referenced by ~Canvas().

clipRect()

void flutter::Canvas::clipRect	(	double	left,
		double	top,
		double	right,
		double	bottom,
		DlClipOp	clipOp,
		bool	doAntiAlias = true
	)

Definition at line 161 of file canvas.cc.

                                        {
  if (display_list_builder_) {
    builder()->ClipRect(DlRect::MakeLTRB(SafeNarrow(left), SafeNarrow(top),
                                         SafeNarrow(right), SafeNarrow(bottom)),
                        clipOp, doAntiAlias);
  }
}

References impeller::TRect< Scalar >::MakeLTRB().

Referenced by ~Canvas().

clipRRect()

void flutter::Canvas::clipRRect	(	const RRect &	rrect,
		bool	doAntiAlias = true
	)

Definition at line 174 of file canvas.cc.

                                                           {
  if (display_list_builder_) {
    builder()->ClipRoundRect(rrect.rrect, DlClipOp::kIntersect, doAntiAlias);
  }
}

References flutter::RRect::rrect.

Referenced by ~Canvas().

clipRSuperellipse()

void flutter::Canvas::clipRSuperellipse	(	const RSuperellipse *	rse,
		bool	doAntiAlias = true
	)

Definition at line 180 of file canvas.cc.

                                                                         {
  if (display_list_builder_) {
    builder()->ClipRoundSuperellipse(rse->rsuperellipse(), DlClipOp::kIntersect,
                                     doAntiAlias);
  }
}

References flutter::RSuperellipse::rsuperellipse().

Referenced by ~Canvas().

Create()

void flutter::Canvas::Create ( Dart_Handle  wrapper, PictureRecorder *  recorder, double  left, double  top, double  right, double  bottom  )

static

Definition at line 23 of file canvas.cc.

                                   {
  UIDartState::ThrowIfUIOperationsProhibited();
 
  if (!recorder) {
    Dart_ThrowException(
        ToDart("Canvas constructor called with non-genuine PictureRecorder."));
    return;
  }
 
  fml::RefPtr<Canvas> canvas =
      fml::MakeRefCounted<Canvas>(recorder->BeginRecording(
          DlRect::MakeLTRB(SafeNarrow(left), SafeNarrow(top), SafeNarrow(right),
                           SafeNarrow(bottom))));
  recorder->set_canvas(canvas);
  canvas->AssociateWithDartWrapper(wrapper);
}

References flutter::PictureRecorder::BeginRecording(), impeller::TRect< Scalar >::MakeLTRB(), and flutter::PictureRecorder::set_canvas().

drawArc()

void flutter::Canvas::drawArc	(	double	left,
		double	top,
		double	right,
		double	bottom,
		double	startAngle,
		double	sweepAngle,
		bool	useCenter,
		Dart_Handle	paint_objects,
		Dart_Handle	paint_data
	)

Definition at line 352 of file canvas.cc.

                                             {
  Paint paint(paint_objects, paint_data);
 
  FML_DCHECK(paint.isNotNull());
  if (display_list_builder_) {
    DlPaint dl_paint;
    paint.paint(dl_paint,
                useCenter ? kDrawArcWithCenterFlags : kDrawArcNoCenterFlags,
                DlTileMode::kDecal);
    builder()->DrawArc(
        DlRect::MakeLTRB(SafeNarrow(left), SafeNarrow(top), SafeNarrow(right),
                         SafeNarrow(bottom)),
        SafeNarrow(startAngle) * 180.0f / static_cast<float>(M_PI),
        SafeNarrow(sweepAngle) * 180.0f / static_cast<float>(M_PI), useCenter,
        dl_paint);
  }
}

References FML_DCHECK, and impeller::TRect< Scalar >::MakeLTRB().

Referenced by ~Canvas().

drawAtlas()

Dart_Handle flutter::Canvas::drawAtlas	(	Dart_Handle	paint_objects,
		Dart_Handle	paint_data,
		int	filterQualityIndex,
		CanvasImage *	atlas,
		Dart_Handle	transforms_handle,
		Dart_Handle	rects_handle,
		Dart_Handle	colors_handle,
		DlBlendMode	blend_mode,
		Dart_Handle	cull_rect_handle
	)

Definition at line 579 of file canvas.cc.

                                                            {
  Paint paint(paint_objects, paint_data);
 
  if (!atlas) {
    return ToDart(
        "Canvas.drawAtlas or Canvas.drawRawAtlas called with "
        "non-genuine Image.");
  }
 
  auto dl_image = atlas->image();
  auto error = dl_image->get_error();
  if (error) {
    return ToDart(error.value());
  }
 
  static_assert(sizeof(DlRSTransform) == sizeof(float) * 4,
                "DlRSTransform doesn't use floats.");
  static_assert(sizeof(DlRect) == sizeof(float) * 4,
                "DlRect doesn't use floats.");
 
  auto sampling = ImageFilter::SamplingFromIndex(filterQualityIndex);
 
  FML_DCHECK(paint.isNotNull());
  if (display_list_builder_) {
    tonic::Float32List transforms(transforms_handle);
    tonic::Float32List rects(rects_handle);
    tonic::Int32List colors(colors_handle);
    tonic::Float32List cull_rect(cull_rect_handle);
 
    std::vector<DlColor> dl_color(colors.num_elements());
    size_t count = colors.num_elements();
    for (size_t i = 0; i < count; i++) {
      dl_color[i] = DlColor(colors[i]);
    }
 
    DlPaint dl_paint;
    const DlPaint* opt_paint =
        paint.paint(dl_paint, kDrawAtlasWithPaintFlags, DlTileMode::kClamp);
    builder()->DrawAtlas(
        dl_image, reinterpret_cast<const DlRSTransform*>(transforms.data()),
        reinterpret_cast<const DlRect*>(rects.data()), dl_color.data(),
        rects.num_elements() / 4,  // DlRect have four floats.
        blend_mode, sampling, reinterpret_cast<const DlRect*>(cull_rect.data()),
        opt_paint);
  }
  return Dart_Null();
}

References error, FML_DCHECK, i, and flutter::CanvasImage::image().

Referenced by ~Canvas().

drawCircle()

void flutter::Canvas::drawCircle	(	double	x,
		double	y,
		double	radius,
		Dart_Handle	paint_objects,
		Dart_Handle	paint_data
	)

Definition at line 336 of file canvas.cc.

                                                {
  Paint paint(paint_objects, paint_data);
 
  FML_DCHECK(paint.isNotNull());
  if (display_list_builder_) {
    DlPaint dl_paint;
    paint.paint(dl_paint, kDrawCircleFlags, DlTileMode::kDecal);
    builder()->DrawCircle(DlPoint(SafeNarrow(x), SafeNarrow(y)),
                          SafeNarrow(radius), dl_paint);
  }
}

References FML_DCHECK, x, and y.

Referenced by ~Canvas().

drawColor()

void flutter::Canvas::drawColor	(	uint32_t	color,
		DlBlendMode	blend_mode
	)

Definition at line 220 of file canvas.cc.

                                                             {
  if (display_list_builder_) {
    builder()->DrawColor(DlColor(color), blend_mode);
  }
}

Referenced by ~Canvas().

drawDRRect()

void flutter::Canvas::drawDRRect	(	const RRect &	outer,
		const RRect &	inner,
		Dart_Handle	paint_objects,
		Dart_Handle	paint_data
	)

Definition at line 291 of file canvas.cc.

                                                {
  Paint paint(paint_objects, paint_data);
 
  FML_DCHECK(paint.isNotNull());
  if (display_list_builder_) {
    DlPaint dl_paint;
    paint.paint(dl_paint, kDrawDRRectFlags, DlTileMode::kDecal);
    builder()->DrawDiffRoundRect(outer.rrect, inner.rrect, dl_paint);
  }
}

References FML_DCHECK, and flutter::RRect::rrect.

Referenced by ~Canvas().

drawImage()

Dart_Handle flutter::Canvas::drawImage	(	const CanvasImage *	image,
		double	x,
		double	y,
		Dart_Handle	paint_objects,
		Dart_Handle	paint_data,
		int	filterQualityIndex
	)

Definition at line 396 of file canvas.cc.

                                                      {
  Paint paint(paint_objects, paint_data);
 
  FML_DCHECK(paint.isNotNull());
  if (!image) {
    return ToDart("Canvas.drawImage called with non-genuine Image.");
  }
 
  auto dl_image = image->image();
  if (!dl_image) {
    return Dart_Null();
  }
  auto error = dl_image->get_error();
  if (error) {
    return ToDart(error.value());
  }
 
  auto sampling = ImageFilter::SamplingFromIndex(filterQualityIndex);
  if (display_list_builder_) {
    DlPaint dl_paint;
    const DlPaint* opt_paint =
        paint.paint(dl_paint, kDrawImageWithPaintFlags, DlTileMode::kClamp);
    builder()->DrawImage(dl_image, DlPoint(SafeNarrow(x), SafeNarrow(y)),
                         sampling, opt_paint);
  }
  return Dart_Null();
}

References error, FML_DCHECK, FlutterVulkanImage::image, image, x, and y.

Referenced by ~Canvas().

drawImageNine()

Dart_Handle flutter::Canvas::drawImageNine	(	const CanvasImage *	image,
		double	center_left,
		double	center_top,
		double	center_right,
		double	center_bottom,
		double	dst_left,
		double	dst_top,
		double	dst_right,
		double	dst_bottom,
		Dart_Handle	paint_objects,
		Dart_Handle	paint_data,
		int	bitmapSamplingIndex
	)

Definition at line 472 of file canvas.cc.

                                                           {
  Paint paint(paint_objects, paint_data);
 
  FML_DCHECK(paint.isNotNull());
  if (!image) {
    return ToDart("Canvas.drawImageNine called with non-genuine Image.");
  }
  auto dl_image = image->image();
  if (!dl_image) {
    return Dart_Null();
  }
  auto error = dl_image->get_error();
  if (error) {
    return ToDart(error.value());
  }
 
  DlRect center =
      DlRect::MakeLTRB(SafeNarrow(center_left), SafeNarrow(center_top),
                       SafeNarrow(center_right), SafeNarrow(center_bottom));
  DlIRect icenter = DlIRect::Round(center);
  DlRect dst = DlRect::MakeLTRB(SafeNarrow(dst_left), SafeNarrow(dst_top),
                                SafeNarrow(dst_right), SafeNarrow(dst_bottom));
  auto filter = ImageFilter::FilterModeFromIndex(bitmapSamplingIndex);
  if (display_list_builder_) {
    DlPaint dl_paint;
    const DlPaint* opt_paint =
        paint.paint(dl_paint, kDrawImageNineWithPaintFlags, DlTileMode::kClamp);
    builder()->DrawImageNine(dl_image, icenter, dst, filter, opt_paint);
  }
  return Dart_Null();
}

References error, FML_DCHECK, FlutterVulkanImage::image, image, impeller::TRect< Scalar >::MakeLTRB(), and impeller::TRect< T >::Round().

Referenced by ~Canvas().

drawImageRect()

Dart_Handle flutter::Canvas::drawImageRect	(	const CanvasImage *	image,
		double	src_left,
		double	src_top,
		double	src_right,
		double	src_bottom,
		double	dst_left,
		double	dst_top,
		double	dst_right,
		double	dst_bottom,
		Dart_Handle	paint_objects,
		Dart_Handle	paint_data,
		int	filterQualityIndex
	)

Definition at line 429 of file canvas.cc.

                                                          {
  Paint paint(paint_objects, paint_data);
 
  FML_DCHECK(paint.isNotNull());
  if (!image) {
    return ToDart("Canvas.drawImageRect called with non-genuine Image.");
  }
 
  auto dl_image = image->image();
  if (!dl_image) {
    return Dart_Null();
  }
  auto error = dl_image->get_error();
  if (error) {
    return ToDart(error.value());
  }
 
  DlRect src = DlRect::MakeLTRB(SafeNarrow(src_left), SafeNarrow(src_top),
                                SafeNarrow(src_right), SafeNarrow(src_bottom));
  DlRect dst = DlRect::MakeLTRB(SafeNarrow(dst_left), SafeNarrow(dst_top),
                                SafeNarrow(dst_right), SafeNarrow(dst_bottom));
  auto sampling = ImageFilter::SamplingFromIndex(filterQualityIndex);
  if (display_list_builder_) {
    DlPaint dl_paint;
    const DlPaint* opt_paint =
        paint.paint(dl_paint, kDrawImageRectWithPaintFlags, DlTileMode::kClamp);
    builder()->DrawImageRect(dl_image, src, dst, sampling, opt_paint,
                             DlSrcRectConstraint::kFast);
  }
  return Dart_Null();
}

References error, FML_DCHECK, FlutterVulkanImage::image, image, and impeller::TRect< Scalar >::MakeLTRB().

Referenced by ~Canvas().

drawLine()

void flutter::Canvas::drawLine	(	double	x1,
		double	y1,
		double	x2,
		double	y2,
		Dart_Handle	paint_objects,
		Dart_Handle	paint_data
	)

Definition at line 226 of file canvas.cc.

                                              {
  Paint paint(paint_objects, paint_data);
 
  FML_DCHECK(paint.isNotNull());
  if (display_list_builder_) {
    DlPaint dl_paint;
    paint.paint(dl_paint, kDrawLineFlags, DlTileMode::kDecal);
    builder()->DrawLine(DlPoint(SafeNarrow(x1), SafeNarrow(y1)),
                        DlPoint(SafeNarrow(x2), SafeNarrow(y2)), dl_paint);
  }
}

References FML_DCHECK.

Referenced by ~Canvas().

drawOval()

void flutter::Canvas::drawOval	(	double	left,
		double	top,
		double	right,
		double	bottom,
		Dart_Handle	paint_objects,
		Dart_Handle	paint_data
	)

Definition at line 318 of file canvas.cc.

                                              {
  Paint paint(paint_objects, paint_data);
 
  FML_DCHECK(paint.isNotNull());
  if (display_list_builder_) {
    DlPaint dl_paint;
    paint.paint(dl_paint, kDrawOvalFlags, DlTileMode::kDecal);
    builder()->DrawOval(DlRect::MakeLTRB(SafeNarrow(left), SafeNarrow(top),
                                         SafeNarrow(right), SafeNarrow(bottom)),
                        dl_paint);
  }
}

References FML_DCHECK, and impeller::TRect< Scalar >::MakeLTRB().

Referenced by ~Canvas().

drawPaint()

void flutter::Canvas::drawPaint	(	Dart_Handle	paint_objects,
		Dart_Handle	paint_data
	)

Definition at line 243 of file canvas.cc.

                                                                        {
  Paint paint(paint_objects, paint_data);
 
  FML_DCHECK(paint.isNotNull());
  if (display_list_builder_) {
    DlPaint dl_paint;
    paint.paint(dl_paint, kDrawPaintFlags, DlTileMode::kClamp);
    std::shared_ptr<DlImageFilter> filter = dl_paint.getImageFilter();
    if (filter && !filter->asColorFilter()) {
      // drawPaint does an implicit saveLayer if an DlImageFilter is
      // present that cannot be replaced by an DlColorFilter.
      TRACE_EVENT0("flutter", "ui.Canvas::saveLayer (Recorded)");
    }
    builder()->DrawPaint(dl_paint);
  }
}

References FML_DCHECK, flutter::DlPaint::getImageFilter(), and TRACE_EVENT0.

Referenced by ~Canvas().

drawPath()

void flutter::Canvas::drawPath	(	const CanvasPath *	path,
		Dart_Handle	paint_objects,
		Dart_Handle	paint_data
	)

Definition at line 378 of file canvas.cc.

                                              {
  Paint paint(paint_objects, paint_data);
 
  FML_DCHECK(paint.isNotNull());
  if (!path) {
    Dart_ThrowException(
        ToDart("Canvas.drawPath called with non-genuine Path."));
    return;
  }
  if (display_list_builder_) {
    DlPaint dl_paint;
    paint.paint(dl_paint, kDrawPathFlags, DlTileMode::kDecal);
    builder()->DrawPath(path->path(), dl_paint);
  }
}

References FML_DCHECK, and flutter::path.

Referenced by ~Canvas().

drawPicture()

void flutter::Canvas::drawPicture

(

Picture *

picture

)

Definition at line 515 of file canvas.cc.

                                         {
  if (!picture) {
    Dart_ThrowException(
        ToDart("Canvas.drawPicture called with non-genuine Picture."));
    return;
  }
  if (picture->display_list()) {
    if (display_list_builder_) {
      builder()->DrawDisplayList(picture->display_list());
    }
  } else {
    FML_DCHECK(false);
  }
}

References flutter::Picture::display_list(), and FML_DCHECK.

Referenced by ~Canvas().

drawPoints()

void flutter::Canvas::drawPoints	(	Dart_Handle	paint_objects,
		Dart_Handle	paint_data,
		DlPointMode	point_mode,
		const tonic::Float32List &	points
	)

Definition at line 530 of file canvas.cc.

                                                        {
  Paint paint(paint_objects, paint_data);
 
  static_assert(sizeof(DlPoint) == sizeof(float) * 2,
                "DlPoint doesn't use floats.");
 
  FML_DCHECK(paint.isNotNull());
  if (display_list_builder_) {
    DlPaint dl_paint;
    switch (point_mode) {
      case DlPointMode::kPoints:
        paint.paint(dl_paint, kDrawPointsAsPointsFlags, DlTileMode::kDecal);
        break;
      case DlPointMode::kLines:
        paint.paint(dl_paint, kDrawPointsAsLinesFlags, DlTileMode::kDecal);
        break;
      case DlPointMode::kPolygon:
        paint.paint(dl_paint, kDrawPointsAsPolygonFlags, DlTileMode::kDecal);
        break;
    }
    builder()->DrawPoints(point_mode,
                          points.num_elements() / 2,  // DlPoints have 2 floats
                          reinterpret_cast<const DlPoint*>(points.data()),
                          dl_paint);
  }
}

References FML_DCHECK, and points.

Referenced by ~Canvas().

drawRect()

void flutter::Canvas::drawRect	(	double	left,
		double	top,
		double	right,
		double	bottom,
		Dart_Handle	paint_objects,
		Dart_Handle	paint_data
	)

Definition at line 260 of file canvas.cc.

                                              {
  Paint paint(paint_objects, paint_data);
 
  FML_DCHECK(paint.isNotNull());
  if (display_list_builder_) {
    DlPaint dl_paint;
    paint.paint(dl_paint, kDrawRectFlags, DlTileMode::kDecal);
    builder()->DrawRect(DlRect::MakeLTRB(SafeNarrow(left), SafeNarrow(top),
                                         SafeNarrow(right), SafeNarrow(bottom)),
                        dl_paint);
  }
}

References FML_DCHECK, and impeller::TRect< Scalar >::MakeLTRB().

Referenced by ~Canvas().

drawRRect()

void flutter::Canvas::drawRRect	(	const RRect &	rrect,
		Dart_Handle	paint_objects,
		Dart_Handle	paint_data
	)

Definition at line 278 of file canvas.cc.

                                               {
  Paint paint(paint_objects, paint_data);
 
  FML_DCHECK(paint.isNotNull());
  if (display_list_builder_) {
    DlPaint dl_paint;
    paint.paint(dl_paint, kDrawRRectFlags, DlTileMode::kDecal);
    builder()->DrawRoundRect(rrect.rrect, dl_paint);
  }
}

References FML_DCHECK, and flutter::RRect::rrect.

Referenced by ~Canvas().

drawRSuperellipse()

void flutter::Canvas::drawRSuperellipse	(	const RSuperellipse *	rse,
		Dart_Handle	paint_objects,
		Dart_Handle	paint_data
	)

Definition at line 305 of file canvas.cc.

                                                       {
  Paint paint(paint_objects, paint_data);
 
  FML_DCHECK(paint.isNotNull());
  if (display_list_builder_) {
    DlPaint dl_paint;
    paint.paint(dl_paint, kDrawDRRectFlags, DlTileMode::kDecal);
    builder()->DrawRoundSuperellipse(rse->rsuperellipse(), dl_paint);
  }
}

References FML_DCHECK, and flutter::RSuperellipse::rsuperellipse().

Referenced by ~Canvas().

drawShadow()

void flutter::Canvas::drawShadow	(	const CanvasPath *	path,
		uint32_t	color,
		double	elevation,
		bool	transparentOccluder
	)

Definition at line 635 of file canvas.cc.

                                                  {
  if (!path) {
    Dart_ThrowException(
        ToDart("Canvas.drawShader called with non-genuine Path."));
    return;
  }
 
  // Not using SafeNarrow because DPR will always be a relatively small number.
  const ViewportMetrics* metrics =
      UIDartState::Current()->platform_configuration()->GetMetrics(0);
  DlScalar dpr;
  // TODO(dkwingsmt): We should support rendering shadows on non-implicit views.
  // However, currently this method has no way to get the target view ID.
  if (metrics == nullptr) {
    dpr = 1.0f;
  } else {
    dpr = static_cast<float>(metrics->device_pixel_ratio);
  }
  if (display_list_builder_) {
    builder()->DrawShadow(path->path(), DlColor(color), SafeNarrow(elevation),
                          transparentOccluder, dpr);
  }
}

References flutter::ViewportMetrics::device_pixel_ratio, and flutter::path.

Referenced by ~Canvas().

drawVertices()

void flutter::Canvas::drawVertices	(	const Vertices *	vertices,
		DlBlendMode	blend_mode,
		Dart_Handle	paint_objects,
		Dart_Handle	paint_data
	)

Definition at line 560 of file canvas.cc.

                                                  {
  Paint paint(paint_objects, paint_data);
 
  if (!vertices) {
    Dart_ThrowException(
        ToDart("Canvas.drawVertices called with non-genuine Vertices."));
    return;
  }
  FML_DCHECK(paint.isNotNull());
  if (display_list_builder_) {
    DlPaint dl_paint;
    paint.paint(dl_paint, kDrawVerticesFlags, DlTileMode::kDecal);
    builder()->DrawVertices(vertices->vertices(), blend_mode, dl_paint);
  }
}

References FML_DCHECK.

Referenced by ~Canvas().

getDestinationClipBounds()

void flutter::Canvas::getDestinationClipBounds

(

Dart_Handle

rect_handle

)

Definition at line 198 of file canvas.cc.

                                                             {
  if (display_list_builder_) {
    auto rect = tonic::Float64List(rect_handle);
    DlRect bounds = builder()->GetDestinationClipCoverage();
    rect[0] = bounds.GetLeft();
    rect[1] = bounds.GetTop();
    rect[2] = bounds.GetRight();
    rect[3] = bounds.GetBottom();
  }
}

References impeller::TRect< T >::GetBottom(), impeller::TRect< T >::GetLeft(), impeller::TRect< T >::GetRight(), and impeller::TRect< T >::GetTop().

Referenced by ~Canvas().

getLocalClipBounds()

void flutter::Canvas::getLocalClipBounds

(

Dart_Handle

rect_handle

)

Definition at line 209 of file canvas.cc.

                                                       {
  if (display_list_builder_) {
    auto rect = tonic::Float64List(rect_handle);
    DlRect bounds = builder()->GetLocalClipCoverage();
    rect[0] = bounds.GetLeft();
    rect[1] = bounds.GetTop();
    rect[2] = bounds.GetRight();
    rect[3] = bounds.GetBottom();
  }
}

References impeller::TRect< T >::GetBottom(), impeller::TRect< T >::GetLeft(), impeller::TRect< T >::GetRight(), and impeller::TRect< T >::GetTop().

Referenced by ~Canvas().

getSaveCount()

int flutter::Canvas::getSaveCount

(

)

Definition at line 98 of file canvas.cc.

                         {
  if (display_list_builder_) {
    return builder()->GetSaveCount();
  } else {
    return 0;
  }
}

Referenced by ~Canvas().

getTransform()

void flutter::Canvas::getTransform

(

Dart_Handle

matrix4_handle

)

Definition at line 150 of file canvas.cc.

                                                    {
  if (display_list_builder_) {
    // The Float array stored by DlMatrix is in column-major order
    DlMatrix matrix = builder()->GetMatrix();
    auto matrix4 = tonic::Float64List(matrix4_handle);
    for (int i = 0; i < 16; i++) {
      matrix4[i] = matrix.m[i];
    }
  }
}

References i, and impeller::Matrix::m.

Referenced by ~Canvas().

Invalidate()

void flutter::Canvas::Invalidate

(

)

Definition at line 662 of file canvas.cc.

                        {
  display_list_builder_ = nullptr;
  if (dart_wrapper()) {
    ClearDartWrapper();
  }
}

Referenced by ~Canvas().

restore()

void flutter::Canvas::restore

(

)

Definition at line 92 of file canvas.cc.

                     {
  if (display_list_builder_) {
    builder()->Restore();
  }
}

Referenced by ~Canvas().

restoreToCount()

void flutter::Canvas::restoreToCount

(

int

count

)

Definition at line 106 of file canvas.cc.

                                     {
  if (display_list_builder_ && count < getSaveCount()) {
    builder()->RestoreToCount(count);
  }
}

Referenced by ~Canvas().

rotate()

void flutter::Canvas::rotate

(

double

radians

)

Definition at line 124 of file canvas.cc.

                                  {
  if (display_list_builder_) {
    builder()->Rotate(SafeNarrow(radians) * 180.0f / static_cast<float>(M_PI));
  }
}

Referenced by ~Canvas().

save()

void flutter::Canvas::save

(

)

Definition at line 50 of file canvas.cc.

                  {
  if (display_list_builder_) {
    builder()->Save();
  }
}

Referenced by ~Canvas().

saveLayer()

void flutter::Canvas::saveLayer	(	double	left,
		double	top,
		double	right,
		double	bottom,
		Dart_Handle	paint_objects,
		Dart_Handle	paint_data
	)

Definition at line 71 of file canvas.cc.

                                               {
  Paint paint(paint_objects, paint_data);
 
  FML_DCHECK(paint.isNotNull());
  DlRect bounds = DlRect::MakeLTRB(SafeNarrow(left), SafeNarrow(top),
                                   SafeNarrow(right), SafeNarrow(bottom));
  if (display_list_builder_) {
    DlPaint dl_paint;
    const DlPaint* save_paint =
        paint.paint(dl_paint, kSaveLayerWithPaintFlags, DlTileMode::kDecal);
    FML_DCHECK(save_paint);
    TRACE_EVENT0("flutter", "ui.Canvas::saveLayer (Recorded)");
    builder()->SaveLayer(bounds, save_paint);
  }
}

References FML_DCHECK, impeller::TRect< Scalar >::MakeLTRB(), and TRACE_EVENT0.

Referenced by ~Canvas().

saveLayerWithoutBounds()

void flutter::Canvas::saveLayerWithoutBounds	(	Dart_Handle	paint_objects,
		Dart_Handle	paint_data
	)

Definition at line 56 of file canvas.cc.

                                                            {
  Paint paint(paint_objects, paint_data);
 
  FML_DCHECK(paint.isNotNull());
  if (display_list_builder_) {
    DlPaint dl_paint;
    const DlPaint* save_paint =
        paint.paint(dl_paint, kSaveLayerWithPaintFlags, DlTileMode::kDecal);
    FML_DCHECK(save_paint);
    TRACE_EVENT0("flutter", "ui.Canvas::saveLayer (Recorded)");
    builder()->SaveLayer(std::nullopt, save_paint);
  }
}

References FML_DCHECK, and TRACE_EVENT0.

Referenced by ~Canvas().

scale()

void flutter::Canvas::scale	(	double	sx,
		double	sy
	)

Definition at line 118 of file canvas.cc.

                                       {
  if (display_list_builder_) {
    builder()->Scale(SafeNarrow(sx), SafeNarrow(sy));
  }
}

Referenced by ~Canvas().

skew()

void flutter::Canvas::skew	(	double	sx,
		double	sy
	)

Definition at line 130 of file canvas.cc.

                                      {
  if (display_list_builder_) {
    builder()->Skew(SafeNarrow(sx), SafeNarrow(sy));
  }
}

Referenced by ~Canvas().

transform()

void flutter::Canvas::transform

(

const tonic::Float64List &

matrix4

)

Definition at line 136 of file canvas.cc.

                                                      {
  // The Float array stored by Dart Matrix4 is in column-major order
  // DisplayList TransformFullPerspective takes row-major matrix order
  if (display_list_builder_) {
    // clang-format off
    builder()->TransformFullPerspective(
        SafeNarrow(matrix4[ 0]), SafeNarrow(matrix4[ 4]), SafeNarrow(matrix4[ 8]), SafeNarrow(matrix4[12]),
        SafeNarrow(matrix4[ 1]), SafeNarrow(matrix4[ 5]), SafeNarrow(matrix4[ 9]), SafeNarrow(matrix4[13]),
        SafeNarrow(matrix4[ 2]), SafeNarrow(matrix4[ 6]), SafeNarrow(matrix4[10]), SafeNarrow(matrix4[14]),
        SafeNarrow(matrix4[ 3]), SafeNarrow(matrix4[ 7]), SafeNarrow(matrix4[11]), SafeNarrow(matrix4[15]));
    // clang-format on
  }
}

translate()

void flutter::Canvas::translate	(	double	dx,
		double	dy
	)

Definition at line 112 of file canvas.cc.

                                           {
  if (display_list_builder_) {
    builder()->Translate(SafeNarrow(dx), SafeNarrow(dy));
  }
}

Referenced by ~Canvas().

---

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

• lib/ui/painting/canvas.h
• lib/ui/painting/canvas.cc