flutter::RasterCacheResult Class Reference

#include <raster_cache.h>

Inheritance diagram for flutter::RasterCacheResult:

Public Member Functions
	RasterCacheResult (sk_sp< DlImage > image, const SkRect &logical_rect, const char *type, sk_sp< const DlRTree > rtree=nullptr)
virtual	~RasterCacheResult ()=default
virtual void	draw (DlCanvas &canvas, const DlPaint *paint, bool preserve_rtree) const
virtual SkISize	image_dimensions () const
virtual int64_t	image_bytes () const

Detailed Description

Definition at line 30 of file raster_cache.h.

Constructor & Destructor Documentation

RasterCacheResult()

flutter::RasterCacheResult::RasterCacheResult	(	sk_sp< DlImage >	image,
		const SkRect &	logical_rect,
		const char *	type,
		sk_sp< const DlRTree >	rtree = nullptr
	)

Definition at line 28 of file raster_cache.cc.

    : image_(std::move(image)),
      logical_rect_(logical_rect),
      flow_(type),
      rtree_(std::move(rtree)) {}

~RasterCacheResult()

virtual flutter::RasterCacheResult::~RasterCacheResult ( )

virtualdefault

Member Function Documentation

draw()

void flutter::RasterCacheResult::draw ( DlCanvas &  canvas, const DlPaint *  paint, bool  preserve_rtree  ) const

virtual

Reimplemented in flutter::testing::MockRasterCacheResult.

Definition at line 37 of file raster_cache.cc.

                                                        {
  DlAutoCanvasRestore auto_restore(&canvas, true);
 
  auto matrix =
      RasterCacheUtil::GetIntegralTransCTM(ToSkMatrix(canvas.GetMatrix()));
  SkRect bounds =
      RasterCacheUtil::GetRoundedOutDeviceBounds(logical_rect_, matrix);
  FML_DCHECK(std::abs(bounds.width() - image_->GetSize().width) <= 1 &&
             std::abs(bounds.height() - image_->GetSize().height) <= 1);
  canvas.TransformReset();
  flow_.Step();
  if (!preserve_rtree || !rtree_) {
    canvas.DrawImage(image_, DlPoint(bounds.fLeft, bounds.fTop),
                     DlImageSampling::kNearestNeighbor, paint);
  } else {
    // On some platforms RTree from overlay layers is used for unobstructed
    // platform views and hit testing. To preserve the RTree raster cache must
    // paint individual rects instead of the whole image.
    auto rects = rtree_->region().getRects(true);
 
    canvas.Translate(bounds.fLeft, bounds.fTop);
 
    SkRect rtree_bounds = RasterCacheUtil::GetRoundedOutDeviceBounds(
        ToSkRect(rtree_->bounds()), matrix);
    for (auto rect : rects) {
      DlRect device_rect = ToDlRect(RasterCacheUtil::GetRoundedOutDeviceBounds(
          SkRect::Make(ToSkIRect(rect)), matrix));
      device_rect = device_rect.Shift(-rtree_bounds.fLeft, -rtree_bounds.fTop);
      canvas.DrawImageRect(image_, device_rect, device_rect,
                           DlImageSampling::kNearestNeighbor, paint);
    }
  }
}

References flutter::DlCanvas::DrawImage(), flutter::DlCanvas::DrawImageRect(), FML_DCHECK, flutter::RasterCacheUtil::GetIntegralTransCTM(), flutter::DlCanvas::GetMatrix(), flutter::RasterCacheUtil::GetRoundedOutDeviceBounds(), flutter::kNearestNeighbor, impeller::TRect< T >::Shift(), fml::tracing::TraceFlow::Step(), flutter::ToDlRect(), flutter::ToSkIRect(), flutter::ToSkMatrix(), flutter::ToSkRect(), flutter::DlCanvas::TransformReset(), and flutter::DlCanvas::Translate().

image_bytes()

virtual int64_t flutter::RasterCacheResult::image_bytes ( ) const

inlinevirtual

Reimplemented in flutter::testing::MockRasterCacheResult.

Definition at line 47 of file raster_cache.h.

                                      {
    return image_ ? image_->GetApproximateByteSize() : 0;
  };

image_dimensions()

virtual SkISize flutter::RasterCacheResult::image_dimensions ( ) const

inlinevirtual

Reimplemented in flutter::testing::MockRasterCacheResult.

Definition at line 43 of file raster_cache.h.

                                           {
    return image_ ? ToSkISize(image_->GetSize()) : SkISize::Make(0, 0);
  };

References flutter::ToSkISize().

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

• flow/raster_cache.h
• flow/raster_cache.cc