skiagm::ResizeGM Class Reference

Inheritance diagram for skiagm::ResizeGM:

Public Member Functions
	ResizeGM ()
Public Member Functions inherited from skiagm::GM
	GM (SkColor backgroundColor=SK_ColorWHITE)
virtual	~GM ()
void	setMode (Mode mode)
Mode	getMode () const
DrawResult	gpuSetup (SkCanvas *, SkString *errorMsg, GraphiteTestContext *=nullptr)
void	gpuTeardown ()
void	onceBeforeDraw ()
DrawResult	draw (SkCanvas *canvas)
DrawResult	draw (SkCanvas *, SkString *errorMsg)
void	drawBackground (SkCanvas *)
DrawResult	drawContent (SkCanvas *canvas)
DrawResult	drawContent (SkCanvas *, SkString *errorMsg)
virtual bool	runAsBench () const
SkScalar	width ()
SkScalar	height ()
SkColor	getBGColor () const
void	setBGColor (SkColor)
void	drawSizeBounds (SkCanvas *, SkColor)
bool	animate (double)
virtual bool	onChar (SkUnichar)
bool	getControls (SkMetaData *controls)
void	setControls (const SkMetaData &controls)
virtual void	modifyGrContextOptions (GrContextOptions *)
virtual void	modifyGraphiteContextOptions (skgpu::graphite::ContextOptions *) const
virtual bool	isBazelOnly () const
virtual std::map< std::string, std::string >	getGoldKeys () const

Protected Member Functions
SkString	getName () const override
void	draw (SkCanvas *canvas, const SkRect &rect, const SkSize &deviceSize, const SkSamplingOptions &sampling, sk_sp< SkImageFilter > input)
SkISize	getISize () override
void	onDraw (SkCanvas *canvas) override
Protected Member Functions inherited from skiagm::GM
virtual DrawResult	onGpuSetup (SkCanvas *, SkString *, GraphiteTestContext *)
virtual void	onGpuTeardown ()
virtual void	onOnceBeforeDraw ()
virtual DrawResult	onDraw (SkCanvas *, SkString *errorMsg)
virtual bool	onAnimate (double)
virtual bool	onGetControls (SkMetaData *)
virtual void	onSetControls (const SkMetaData &)
GraphiteTestContext *	graphiteTestContext () const

Additional Inherited Members
Public Types inherited from skiagm::GM
enum	Mode { kGM_Mode , kSample_Mode , kBench_Mode }
using	DrawResult = skiagm::DrawResult
using	GraphiteTestContext = skiatest::graphite::GraphiteTestContext
Static Public Attributes inherited from skiagm::GM
static constexpr char	kErrorMsg_DrawSkippedGpuOnly []

Detailed Description

Definition at line 27 of file resizeimagefilter.cpp.

Constructor & Destructor Documentation

ResizeGM()

skiagm::ResizeGM::ResizeGM ( )

inline

Definition at line 29 of file resizeimagefilter.cpp.

               {
        this->setBGColor(0x00000000);
    }

Member Function Documentation

draw()

void skiagm::ResizeGM::draw ( SkCanvas *  canvas, const SkRect &  rect, const SkSize &  deviceSize, const SkSamplingOptions &  sampling, sk_sp< SkImageFilter >  input  )

inlineprotected

Definition at line 36 of file resizeimagefilter.cpp.

                                          {
        SkRect dstRect;
        canvas->getLocalToDeviceAs3x3().mapRect(&dstRect, rect);
        canvas->save();
        SkScalar deviceScaleX = deviceSize.width() / dstRect.width();
        SkScalar deviceScaleY = deviceSize.height() / dstRect.height();
        canvas->translate(rect.x(), rect.y());
        canvas->scale(deviceScaleX, deviceScaleY);
        canvas->translate(-rect.x(), -rect.y());
        SkMatrix matrix;
        matrix.setScale(SkScalarInvert(deviceScaleX), SkScalarInvert(deviceScaleY));
        sk_sp<SkImageFilter> filter(SkImageFilters::MatrixTransform(matrix,
                                                                    sampling,
                                                                    std::move(input)));
        SkPaint filteredPaint;
        filteredPaint.setImageFilter(std::move(filter));
        canvas->saveLayer(&rect, &filteredPaint);
        SkPaint paint;
        paint.setColor(0xFF00FF00);
        SkRect ovalRect = rect;
        ovalRect.inset(SkIntToScalar(4), SkIntToScalar(4));
        canvas->drawOval(ovalRect, paint);
        canvas->restore(); // for saveLayer
        canvas->restore();
    }

getISize()

SkISize skiagm::ResizeGM::getISize ( )

inlineoverrideprotectedvirtual

Implements skiagm::GM.

Definition at line 66 of file resizeimagefilter.cpp.

{ return SkISize::Make(630, 100); }

getName()

SkString skiagm::ResizeGM::getName ( ) const

inlineoverrideprotectedvirtual

Implements skiagm::GM.

Definition at line 34 of file resizeimagefilter.cpp.

{ return SkString("resizeimagefilter"); }

onDraw()

void skiagm::ResizeGM::onDraw ( SkCanvas *  canvas )

inlineoverrideprotectedvirtual

Reimplemented from skiagm::GM.

Definition at line 68 of file resizeimagefilter.cpp.

                                           {
        canvas->clear(SK_ColorBLACK);
 
        const SkSamplingOptions samplings[] = {
            SkSamplingOptions(),
            SkSamplingOptions(SkFilterMode::kLinear),
            SkSamplingOptions(SkFilterMode::kLinear, SkMipmapMode::kLinear),
            SkSamplingOptions(SkCubicResampler::Mitchell()),
            SkSamplingOptions::Aniso(16),
        };
        const SkRect srcRect = SkRect::MakeWH(96, 96);
        const SkSize deviceSize = SkSize::Make(16, 16);
 
        for (const auto& sampling : samplings) {
            this->draw(canvas, srcRect, deviceSize, sampling, nullptr);
            canvas->translate(srcRect.width() + SkIntToScalar(10), 0);
        }
 
        {
            sk_sp<SkSurface> surface(SkSurfaces::Raster(SkImageInfo::MakeN32Premul(16, 16)));
            SkCanvas* surfaceCanvas = surface->getCanvas();
            surfaceCanvas->clear(0x000000);
            {
                SkPaint paint;
                paint.setColor(0xFF00FF00);
                SkRect ovalRect = SkRect::MakeWH(16, 16);
                ovalRect.inset(SkIntToScalar(2)/3, SkIntToScalar(2)/3);
                surfaceCanvas->drawOval(ovalRect, paint);
            }
            sk_sp<SkImage> image(surface->makeImageSnapshot());
            SkRect inRect = SkRect::MakeXYWH(-4, -4, 20, 20);
            SkRect outRect = SkRect::MakeXYWH(-24, -24, 120, 120);
            sk_sp<SkImageFilter> source(
                SkImageFilters::Image(std::move(image), inRect, outRect,
                                      SkSamplingOptions({1/3.0f, 1/3.0f})));
            this->draw(canvas, srcRect, deviceSize, samplings[3], std::move(source));
        }
    }

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

• third_party/skia/gm/resizeimagefilter.cpp