canvas.cc File Reference

#include <vector>
#include "flutter/display_list/dl_builder.h"
#include "flutter/display_list/dl_text_skia.h"
#include "flutter/display_list/geometry/dl_geometry_types.h"
#include "flutter/skwasm/canvas_text.h"
#include "flutter/skwasm/export.h"
#include "flutter/skwasm/helpers.h"
#include "flutter/skwasm/text/text_types.h"
#include "flutter/skwasm/wrappers.h"
#include "third_party/skia/include/core/SkPath.h"
#include "third_party/skia/include/core/SkPathBuilder.h"
#include "third_party/skia/modules/skparagraph/include/Paragraph.h"

Go to the source code of this file.

Functions
SKWASM_EXPORT void	canvas_saveLayer (flutter::DisplayListBuilder *canvas, flutter::DlRect *rect, flutter::DlPaint *paint, Skwasm::sp_wrapper< flutter::DlImageFilter > *backdrop)
SKWASM_EXPORT void	canvas_save (flutter::DisplayListBuilder *canvas)
SKWASM_EXPORT void	canvas_restore (flutter::DisplayListBuilder *canvas)
SKWASM_EXPORT void	canvas_restoreToCount (flutter::DisplayListBuilder *canvas, int count)
SKWASM_EXPORT int	canvas_getSaveCount (flutter::DisplayListBuilder *canvas)
SKWASM_EXPORT void	canvas_translate (flutter::DisplayListBuilder *canvas, float dx, float dy)
SKWASM_EXPORT void	canvas_scale (flutter::DisplayListBuilder *canvas, float sx, float sy)
SKWASM_EXPORT void	canvas_rotate (flutter::DisplayListBuilder *canvas, flutter::DlScalar degrees)
SKWASM_EXPORT void	canvas_skew (flutter::DisplayListBuilder *canvas, flutter::DlScalar sx, flutter::DlScalar sy)
SKWASM_EXPORT void	canvas_transform (flutter::DisplayListBuilder *canvas, const flutter::DlMatrix *matrix_44)
SKWASM_EXPORT void	canvas_clear (flutter::DisplayListBuilder *canvas, uint32_t color)
SKWASM_EXPORT void	canvas_clipRect (flutter::DisplayListBuilder *canvas, const flutter::DlRect *rect, flutter::DlClipOp op, bool antialias)
SKWASM_EXPORT void	canvas_clipRRect (flutter::DisplayListBuilder *canvas, const SkScalar *rrect_values, bool antialias)
SKWASM_EXPORT void	canvas_clipPath (flutter::DisplayListBuilder *canvas, SkPathBuilder *path, bool antialias)
SKWASM_EXPORT void	canvas_drawColor (flutter::DisplayListBuilder *canvas, uint32_t color, flutter::DlBlendMode blend_mode)
SKWASM_EXPORT void	canvas_drawLine (flutter::DisplayListBuilder *canvas, flutter::DlScalar x1, flutter::DlScalar y1, flutter::DlScalar x2, flutter::DlScalar y2, flutter::DlPaint *paint)
SKWASM_EXPORT void	canvas_drawPaint (flutter::DisplayListBuilder *canvas, flutter::DlPaint *paint)
SKWASM_EXPORT void	canvas_drawRect (flutter::DisplayListBuilder *canvas, flutter::DlRect *rect, flutter::DlPaint *paint)
SKWASM_EXPORT void	canvas_drawRRect (flutter::DisplayListBuilder *canvas, const SkScalar *rrect_values, flutter::DlPaint *paint)
SKWASM_EXPORT void	canvas_drawDRRect (flutter::DisplayListBuilder *canvas, const SkScalar *outer_rrect_values, const SkScalar *inner_rrect_values, flutter::DlPaint *paint)
SKWASM_EXPORT void	canvas_drawOval (flutter::DisplayListBuilder *canvas, const flutter::DlRect *rect, flutter::DlPaint *paint)
SKWASM_EXPORT void	canvas_drawCircle (flutter::DisplayListBuilder *canvas, flutter::DlScalar x, flutter::DlScalar y, flutter::DlScalar radius, flutter::DlPaint *paint)
SKWASM_EXPORT void	canvas_drawArc (flutter::DisplayListBuilder *canvas, const flutter::DlRect *rect, flutter::DlScalar start_angle_degrees, flutter::DlScalar sweep_angle_degrees, bool use_center, flutter::DlPaint *paint)
SKWASM_EXPORT void	canvas_drawPath (flutter::DisplayListBuilder *canvas, SkPathBuilder *path, flutter::DlPaint *paint)
SKWASM_EXPORT void	canvas_drawShadow (flutter::DisplayListBuilder *canvas, SkPathBuilder *path, flutter::DlScalar elevation, flutter::DlScalar device_pixel_ratio, uint32_t color, bool transparent_occluder)
SKWASM_EXPORT void	canvas_drawParagraph (flutter::DisplayListBuilder *canvas, Skwasm::Paragraph *paragraph, flutter::DlScalar x, flutter::DlScalar y)
SKWASM_EXPORT void	canvas_drawPicture (flutter::DisplayListBuilder *canvas, flutter::DisplayList *picture)
SKWASM_EXPORT void	canvas_drawImage (flutter::DisplayListBuilder *canvas, flutter::DlImage *image, flutter::DlScalar offset_x, flutter::DlScalar offset_y, flutter::DlPaint *paint, Skwasm::FilterQuality quality)
SKWASM_EXPORT void	canvas_drawImageRect (flutter::DisplayListBuilder *canvas, flutter::DlImage *image, flutter::DlRect *source_rect, flutter::DlRect *dest_rect, flutter::DlPaint *paint, Skwasm::FilterQuality quality)
SKWASM_EXPORT void	canvas_drawImageNine (flutter::DisplayListBuilder *canvas, flutter::DlImage *image, flutter::DlIRect *center_rect, flutter::DlRect *destination_rect, flutter::DlPaint *paint, Skwasm::FilterQuality quality)
SKWASM_EXPORT void	canvas_drawVertices (flutter::DisplayListBuilder *canvas, Skwasm::sp_wrapper< flutter::DlVertices > *vertices, flutter::DlBlendMode mode, flutter::DlPaint *paint)
SKWASM_EXPORT void	canvas_drawPoints (flutter::DisplayListBuilder *canvas, flutter::DlPointMode mode, flutter::DlPoint *points, int point_count, flutter::DlPaint *paint)
SKWASM_EXPORT void	canvas_drawAtlas (flutter::DisplayListBuilder *canvas, flutter::DlImage *atlas, flutter::DlRSTransform *transforms, flutter::DlRect *rects, uint32_t *colors, int sprite_count, flutter::DlBlendMode mode, flutter::DlRect *cull_rect, flutter::DlPaint *paint)
SKWASM_EXPORT void	canvas_getTransform (flutter::DisplayListBuilder *canvas, flutter::DlMatrix *out_transform)
SKWASM_EXPORT void	canvas_getLocalClipBounds (flutter::DisplayListBuilder *canvas, flutter::DlRect *out_rect)
SKWASM_EXPORT void	canvas_getDeviceClipBounds (flutter::DisplayListBuilder *canvas, flutter::DlIRect *out_rect)
SKWASM_EXPORT bool	canvas_quickReject (flutter::DisplayListBuilder *canvas, flutter::DlRect *rect)

Function Documentation

canvas_clear()

SKWASM_EXPORT void canvas_clear	(	flutter::DisplayListBuilder *	canvas,
		uint32_t	color
	)

Definition at line 182 of file canvas.cc.

                                                {
  canvas->DrawColor(flutter::DlColor(color), flutter::DlBlendMode::kSrc);
}

References flutter::DisplayListBuilder::DrawColor().

canvas_clipPath()

SKWASM_EXPORT void canvas_clipPath	(	flutter::DisplayListBuilder *	canvas,
		SkPathBuilder *	path,
		bool	antialias
	)

Definition at line 201 of file canvas.cc.

                                                   {
  canvas->ClipPath(flutter::DlPath(path->snapshot()),
                   flutter::DlClipOp::kIntersect, antialias);
}

References flutter::DisplayListBuilder::ClipPath(), and flutter::kIntersect.

canvas_clipRect()

SKWASM_EXPORT void canvas_clipRect	(	flutter::DisplayListBuilder *	canvas,
		const flutter::DlRect *	rect,
		flutter::DlClipOp	op,
		bool	antialias
	)

Definition at line 187 of file canvas.cc.

                                                   {
  canvas->ClipRect(*rect, op);
}

References flutter::DisplayListBuilder::ClipRect().

canvas_clipRRect()

SKWASM_EXPORT void canvas_clipRRect	(	flutter::DisplayListBuilder *	canvas,
		const SkScalar *	rrect_values,
		bool	antialias
	)

Definition at line 194 of file canvas.cc.

                                                    {
  canvas->ClipRoundRect(Skwasm::CreateDlRRect(rrect_values),
                        flutter::DlClipOp::kIntersect, antialias);
}

References flutter::DisplayListBuilder::ClipRoundRect(), Skwasm::CreateDlRRect(), and flutter::kIntersect.

canvas_drawArc()

SKWASM_EXPORT void canvas_drawArc	(	flutter::DisplayListBuilder *	canvas,
		const flutter::DlRect *	rect,
		flutter::DlScalar	start_angle_degrees,
		flutter::DlScalar	sweep_angle_degrees,
		bool	use_center,
		flutter::DlPaint *	paint
	)

Definition at line 266 of file canvas.cc.

                                                         {
  canvas->DrawArc(*rect, start_angle_degrees, sweep_angle_degrees, use_center,
                  paint ? *paint : flutter::DlPaint());
}

References flutter::DisplayListBuilder::DrawArc(), and use_center.

canvas_drawAtlas()

SKWASM_EXPORT void canvas_drawAtlas	(	flutter::DisplayListBuilder *	canvas,
		flutter::DlImage *	atlas,
		flutter::DlRSTransform *	transforms,
		flutter::DlRect *	rects,
		uint32_t *	colors,
		int	sprite_count,
		flutter::DlBlendMode	mode,
		flutter::DlRect *	cull_rect,
		flutter::DlPaint *	paint
	)

Definition at line 355 of file canvas.cc.

                                                           {
  std::vector<flutter::DlColor> dl_colors(sprite_count);
  for (int i = 0; i < sprite_count; i++) {
    dl_colors[i] = flutter::DlColor(colors[i]);
  }
  canvas->DrawAtlas(
      sk_ref_sp(atlas), transforms, rects, dl_colors.data(), sprite_count, mode,
      Skwasm::SamplingOptionsForQuality(Skwasm::FilterQuality::medium),
      cull_rect, paint);
}

References flutter::DisplayListBuilder::DrawAtlas(), i, Skwasm::medium, and Skwasm::SamplingOptionsForQuality().

canvas_drawCircle()

SKWASM_EXPORT void canvas_drawCircle	(	flutter::DisplayListBuilder *	canvas,
		flutter::DlScalar	x,
		flutter::DlScalar	y,
		flutter::DlScalar	radius,
		flutter::DlPaint *	paint
	)

Definition at line 257 of file canvas.cc.

                                                            {
  canvas->DrawCircle(flutter::DlPoint{x, y}, radius,
                     paint ? *paint : flutter::DlPaint());
}

References flutter::DisplayListBuilder::DrawCircle(), x, and y.

canvas_drawColor()

SKWASM_EXPORT void canvas_drawColor	(	flutter::DisplayListBuilder *	canvas,
		uint32_t	color,
		flutter::DlBlendMode	blend_mode
	)

Definition at line 208 of file canvas.cc.

                                                                   {
  canvas->DrawColor(flutter::DlColor(color), blend_mode);
}

References flutter::DisplayListBuilder::DrawColor().

canvas_drawDRRect()

SKWASM_EXPORT void canvas_drawDRRect	(	flutter::DisplayListBuilder *	canvas,
		const SkScalar *	outer_rrect_values,
		const SkScalar *	inner_rrect_values,
		flutter::DlPaint *	paint
	)

Definition at line 242 of file canvas.cc.

                                                            {
  canvas->DrawDiffRoundRect(Skwasm::CreateDlRRect(outer_rrect_values),
                            Skwasm::CreateDlRRect(inner_rrect_values),
                            paint ? *paint : flutter::DlPaint());
}

References Skwasm::CreateDlRRect(), and flutter::DisplayListBuilder::DrawDiffRoundRect().

canvas_drawImage()

SKWASM_EXPORT void canvas_drawImage	(	flutter::DisplayListBuilder *	canvas,
		flutter::DlImage *	image,
		flutter::DlScalar	offset_x,
		flutter::DlScalar	offset_y,
		flutter::DlPaint *	paint,
		Skwasm::FilterQuality	quality
	)

Definition at line 306 of file canvas.cc.

                                                                 {
  canvas->DrawImage(sk_ref_sp(image), flutter::DlPoint{offset_x, offset_y},
                    Skwasm::SamplingOptionsForQuality(quality), paint);
}

References flutter::DisplayListBuilder::DrawImage(), image, and Skwasm::SamplingOptionsForQuality().

canvas_drawImageNine()

SKWASM_EXPORT void canvas_drawImageNine	(	flutter::DisplayListBuilder *	canvas,
		flutter::DlImage *	image,
		flutter::DlIRect *	center_rect,
		flutter::DlRect *	destination_rect,
		flutter::DlPaint *	paint,
		Skwasm::FilterQuality	quality
	)

Definition at line 327 of file canvas.cc.

                                                                     {
  canvas->DrawImageNine(sk_ref_sp(image), *center_rect, *destination_rect,
                        FilterModeForQuality(quality), paint);
}

References flutter::DisplayListBuilder::DrawImageNine(), and image.

canvas_drawImageRect()

SKWASM_EXPORT void canvas_drawImageRect	(	flutter::DisplayListBuilder *	canvas,
		flutter::DlImage *	image,
		flutter::DlRect *	source_rect,
		flutter::DlRect *	dest_rect,
		flutter::DlPaint *	paint,
		Skwasm::FilterQuality	quality
	)

Definition at line 316 of file canvas.cc.

                                                                     {
  canvas->DrawImageRect(sk_ref_sp(image), *source_rect, *dest_rect,
                        Skwasm::SamplingOptionsForQuality(quality), paint,
                        flutter::DlSrcRectConstraint::kStrict);
}

References flutter::DisplayListBuilder::DrawImageRect(), image, flutter::kStrict, and Skwasm::SamplingOptionsForQuality().

canvas_drawLine()

SKWASM_EXPORT void canvas_drawLine	(	flutter::DisplayListBuilder *	canvas,
		flutter::DlScalar	x1,
		flutter::DlScalar	y1,
		flutter::DlScalar	x2,
		flutter::DlScalar	y2,
		flutter::DlPaint *	paint
	)

Definition at line 214 of file canvas.cc.

                                                          {
  canvas->DrawLine(flutter::DlPoint{x1, y1}, flutter::DlPoint{x2, y2},
                   paint ? *paint : flutter::DlPaint());
}

References flutter::DisplayListBuilder::DrawLine().

canvas_drawOval()

SKWASM_EXPORT void canvas_drawOval	(	flutter::DisplayListBuilder *	canvas,
		const flutter::DlRect *	rect,
		flutter::DlPaint *	paint
	)

Definition at line 251 of file canvas.cc.

                                                          {
  canvas->DrawOval(*rect, paint ? *paint : flutter::DlPaint());
}

References flutter::DisplayListBuilder::DrawOval().

canvas_drawPaint()

SKWASM_EXPORT void canvas_drawPaint	(	flutter::DisplayListBuilder *	canvas,
		flutter::DlPaint *	paint
	)

Definition at line 224 of file canvas.cc.

                                                           {
  canvas->DrawPaint(paint ? *paint : flutter::DlPaint());
}

References flutter::DisplayListBuilder::DrawPaint().

canvas_drawParagraph()

SKWASM_EXPORT void canvas_drawParagraph	(	flutter::DisplayListBuilder *	canvas,
		Skwasm::Paragraph *	paragraph,
		flutter::DlScalar	x,
		flutter::DlScalar	y
	)

Definition at line 293 of file canvas.cc.

                                                           {
  auto painter = SkwasmParagraphPainter(*canvas, paragraph->paints);
  paragraph->skia_paragraph->paint(&painter, x, y);
}

References Skwasm::Paragraph::paints, Skwasm::Paragraph::skia_paragraph, x, and y.

canvas_drawPath()

SKWASM_EXPORT void canvas_drawPath	(	flutter::DisplayListBuilder *	canvas,
		SkPathBuilder *	path,
		flutter::DlPaint *	paint
	)

Definition at line 276 of file canvas.cc.

                                                          {
  canvas->DrawPath(flutter::DlPath(path->snapshot()),
                   paint ? *paint : flutter::DlPaint());
}

References flutter::DisplayListBuilder::DrawPath().

canvas_drawPicture()

SKWASM_EXPORT void canvas_drawPicture	(	flutter::DisplayListBuilder *	canvas,
		flutter::DisplayList *	picture
	)

Definition at line 301 of file canvas.cc.

                                                                   {
  canvas->DrawDisplayList(sk_ref_sp(picture));
}

References flutter::DisplayListBuilder::DrawDisplayList().

canvas_drawPoints()

SKWASM_EXPORT void canvas_drawPoints	(	flutter::DisplayListBuilder *	canvas,
		flutter::DlPointMode	mode,
		flutter::DlPoint *	points,
		int	point_count,
		flutter::DlPaint *	paint
	)

Definition at line 346 of file canvas.cc.

                                                            {
  canvas->DrawPoints(mode, point_count, points,
                     paint ? *paint : flutter::DlPaint());
}

References flutter::DisplayListBuilder::DrawPoints(), and points.

canvas_drawRect()

SKWASM_EXPORT void canvas_drawRect	(	flutter::DisplayListBuilder *	canvas,
		flutter::DlRect *	rect,
		flutter::DlPaint *	paint
	)

Definition at line 229 of file canvas.cc.

                                                          {
  canvas->DrawRect(*rect, paint ? *paint : flutter::DlPaint());
}

References flutter::DisplayListBuilder::DrawRect().

canvas_drawRRect()

SKWASM_EXPORT void canvas_drawRRect	(	flutter::DisplayListBuilder *	canvas,
		const SkScalar *	rrect_values,
		flutter::DlPaint *	paint
	)

Definition at line 235 of file canvas.cc.

                                                           {
  canvas->DrawRoundRect(Skwasm::CreateDlRRect(rrect_values),
                        paint ? *paint : flutter::DlPaint());
}

References Skwasm::CreateDlRRect(), and flutter::DisplayListBuilder::DrawRoundRect().

canvas_drawShadow()

SKWASM_EXPORT void canvas_drawShadow	(	flutter::DisplayListBuilder *	canvas,
		SkPathBuilder *	path,
		flutter::DlScalar	elevation,
		flutter::DlScalar	device_pixel_ratio,
		uint32_t	color,
		bool	transparent_occluder
	)

Definition at line 283 of file canvas.cc.

                                                                {
  canvas->DrawShadow(flutter::DlPath(path->snapshot()), flutter::DlColor(color),
                     elevation, transparent_occluder, device_pixel_ratio);
}

References flutter::DisplayListBuilder::DrawShadow().

canvas_drawVertices()

SKWASM_EXPORT void canvas_drawVertices	(	flutter::DisplayListBuilder *	canvas,
		Skwasm::sp_wrapper< flutter::DlVertices > *	vertices,
		flutter::DlBlendMode	mode,
		flutter::DlPaint *	paint
	)

Definition at line 337 of file canvas.cc.

                           {
  canvas->DrawVertices(vertices->Shared(), mode,
                       paint ? *paint : flutter::DlPaint());
}

References flutter::DisplayListBuilder::DrawVertices(), and Skwasm::sp_wrapper< T >::Shared().

canvas_getDeviceClipBounds()

SKWASM_EXPORT void canvas_getDeviceClipBounds	(	flutter::DisplayListBuilder *	canvas,
		flutter::DlIRect *	out_rect
	)

Definition at line 385 of file canvas.cc.

                              {
  *out_rect = flutter::DlIRect::RoundOut(canvas->GetDestinationClipCoverage());
}

References flutter::DisplayListBuilder::GetDestinationClipCoverage(), and impeller::TRect< T >::RoundOut().

canvas_getLocalClipBounds()

SKWASM_EXPORT void canvas_getLocalClipBounds	(	flutter::DisplayListBuilder *	canvas,
		flutter::DlRect *	out_rect
	)

Definition at line 379 of file canvas.cc.

                             {
  *out_rect = canvas->GetLocalClipCoverage();
}

References flutter::DisplayListBuilder::GetLocalClipCoverage().

canvas_getSaveCount()

SKWASM_EXPORT int canvas_getSaveCount

(

flutter::DisplayListBuilder *

canvas

)

Definition at line 150 of file canvas.cc.

                                                                         {
  return canvas->GetSaveCount();
}

References flutter::DisplayListBuilder::GetSaveCount().

canvas_getTransform()

SKWASM_EXPORT void canvas_getTransform	(	flutter::DisplayListBuilder *	canvas,
		flutter::DlMatrix *	out_transform
	)

Definition at line 374 of file canvas.cc.

                                                                       {
  *out_transform = canvas->GetMatrix();
}

References flutter::DisplayListBuilder::GetMatrix().

canvas_quickReject()

SKWASM_EXPORT bool canvas_quickReject	(	flutter::DisplayListBuilder *	canvas,
		flutter::DlRect *	rect
	)

Definition at line 391 of file canvas.cc.

                                                           {
  return canvas->QuickReject(*rect);
}

References flutter::DisplayListBuilder::QuickReject().

canvas_restore()

SKWASM_EXPORT void canvas_restore

(

flutter::DisplayListBuilder *

canvas

)

Definition at line 136 of file canvas.cc.

                                                                     {
  canvas->Restore();
}

References flutter::DisplayListBuilder::Restore().

canvas_restoreToCount()

SKWASM_EXPORT void canvas_restoreToCount	(	flutter::DisplayListBuilder *	canvas,
		int	count
	)

Definition at line 140 of file canvas.cc.

                                                    {
  if (count > canvas->GetSaveCount()) {
    // According to the docs:
    // "If count is greater than the current getSaveCount then nothing happens."
    return;
  }
  canvas->RestoreToCount(count);
}

References flutter::DisplayListBuilder::GetSaveCount(), and flutter::DisplayListBuilder::RestoreToCount().

canvas_rotate()

SKWASM_EXPORT void canvas_rotate	(	flutter::DisplayListBuilder *	canvas,
		flutter::DlScalar	degrees
	)

Definition at line 166 of file canvas.cc.

                                                          {
  canvas->Rotate(degrees);
}

References flutter::DisplayListBuilder::Rotate().

canvas_save()

SKWASM_EXPORT void canvas_save

(

flutter::DisplayListBuilder *

canvas

)

Definition at line 132 of file canvas.cc.

                                                                  {
  canvas->Save();
}

References flutter::DisplayListBuilder::Save().

canvas_saveLayer()

SKWASM_EXPORT void canvas_saveLayer	(	flutter::DisplayListBuilder *	canvas,
		flutter::DlRect *	rect,
		flutter::DlPaint *	paint,
		Skwasm::sp_wrapper< flutter::DlImageFilter > *	backdrop
	)

Definition at line 123 of file canvas.cc.

                                                      {
  canvas->SaveLayer(rect ? std::optional(*rect) : std::nullopt, paint,
                    backdrop ? backdrop->Raw() : nullptr);
}

References Skwasm::sp_wrapper< T >::Raw(), and flutter::DisplayListBuilder::SaveLayer().

canvas_scale()

SKWASM_EXPORT void canvas_scale	(	flutter::DisplayListBuilder *	canvas,
		float	sx,
		float	sy
	)

Definition at line 160 of file canvas.cc.

                                          {
  canvas->Scale(sx, sy);
}

References flutter::DisplayListBuilder::Scale().

canvas_skew()

SKWASM_EXPORT void canvas_skew	(	flutter::DisplayListBuilder *	canvas,
		flutter::DlScalar	sx,
		flutter::DlScalar	sy
	)

Definition at line 171 of file canvas.cc.

                                                   {
  canvas->Skew(sx, sy);
}

References flutter::DisplayListBuilder::Skew().

canvas_transform()

SKWASM_EXPORT void canvas_transform	(	flutter::DisplayListBuilder *	canvas,
		const flutter::DlMatrix *	matrix_44
	)

Definition at line 177 of file canvas.cc.

                                                                      {
  canvas->Transform(*matrix_44);
}

References flutter::DisplayListBuilder::Transform().

canvas_translate()

SKWASM_EXPORT void canvas_translate	(	flutter::DisplayListBuilder *	canvas,
		float	dx,
		float	dy
	)

Definition at line 154 of file canvas.cc.

                                              {
  canvas->Translate(dx, dy);
}

References flutter::DisplayListBuilder::Translate().