Dashing4GM Class Reference

Inheritance diagram for Dashing4GM:

Private Member Functions
SkString	getName () const override
SkISize	getISize () override
void	onDraw (SkCanvas *canvas) override

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
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
Static Public Attributes inherited from skiagm::GM
static constexpr char	kErrorMsg_DrawSkippedGpuOnly []
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

Detailed Description

Definition at line 315 of file dashing.cpp.

Member Function Documentation

getISize()

SkISize Dashing4GM::getISize ( )

inlineoverrideprivatevirtual

Implements skiagm::GM.

Definition at line 318 of file dashing.cpp.

{ return {640, 1100}; }

getName()

SkString Dashing4GM::getName ( ) const

inlineoverrideprivatevirtual

Implements skiagm::GM.

Definition at line 316 of file dashing.cpp.

{ return SkString("dashing4"); }

onDraw()

void Dashing4GM::onDraw ( SkCanvas *  canvas )

inlineoverrideprivatevirtual

Reimplemented from skiagm::GM.

Definition at line 320 of file dashing.cpp.

                                           {
        struct Intervals {
            int fOnInterval;
            int fOffInterval;
        };
 
        SkPaint paint;
        paint.setStroke(true);
 
        canvas->translate(SkIntToScalar(20), SkIntToScalar(20));
        canvas->translate(SK_ScalarHalf, SK_ScalarHalf);
 
        for (int width = 0; width <= 2; ++width) {
            for (const Intervals& data : {Intervals{1, 1},
                                          Intervals{4, 2},
                                          Intervals{0, 4}}) { // test for zero length on interval.
                                                              // zero length intervals should draw
                                                              // a line of squares or circles
                for (bool aa : {false, true}) {
                    for (auto cap : {SkPaint::kRound_Cap, SkPaint::kSquare_Cap}) {
                        int w = width * width * width;
                        paint.setAntiAlias(aa);
                        paint.setStrokeWidth(SkIntToScalar(w));
                        paint.setStrokeCap(cap);
 
                        int scale = w ? w : 1;
 
                        drawline(canvas, data.fOnInterval * scale, data.fOffInterval * scale,
                                 paint);
                        canvas->translate(0, SkIntToScalar(20));
                    }
                }
            }
        }
 
        for (int aa = 0; aa <= 1; ++aa) {
            paint.setAntiAlias(SkToBool(aa));
            paint.setStrokeWidth(8.f);
            paint.setStrokeCap(SkPaint::kSquare_Cap);
            // Single dash element that is cut off at start and end
            drawline(canvas, 32, 16, paint, 20.f, 0, 5.f);
            canvas->translate(0, SkIntToScalar(20));
 
            // Two dash elements where each one is cut off at beginning and end respectively
            drawline(canvas, 32, 16, paint, 56.f, 0, 5.f);
            canvas->translate(0, SkIntToScalar(20));
 
            // Many dash elements where first and last are cut off at beginning and end respectively
            drawline(canvas, 32, 16, paint, 584.f, 0, 5.f);
            canvas->translate(0, SkIntToScalar(20));
 
            // Diagonal dash line where src pnts are not axis aligned (as apposed to being diagonal from
            // a canvas rotation)
            drawline(canvas, 32, 16, paint, 600.f, 30.f);
            canvas->translate(0, SkIntToScalar(20));
 
            // Case where only the off interval exists on the line. Thus nothing should be drawn
            drawline(canvas, 32, 16, paint, 8.f, 0.f, 40.f);
            canvas->translate(0, SkIntToScalar(20));
        }
 
        // Test overlapping circles.
        canvas->translate(SkIntToScalar(5), SkIntToScalar(20));
        paint.setAntiAlias(true);
        paint.setStrokeCap(SkPaint::kRound_Cap);
        paint.setColor(0x44000000);
        paint.setStrokeWidth(40);
        drawline(canvas, 0, 30, paint);
 
        canvas->translate(0, SkIntToScalar(50));
        paint.setStrokeCap(SkPaint::kSquare_Cap);
        drawline(canvas, 0, 30, paint);
 
        // Test we draw the cap when the line length is zero.
        canvas->translate(0, SkIntToScalar(50));
        paint.setStrokeCap(SkPaint::kRound_Cap);
        paint.setColor(0xFF000000);
        paint.setStrokeWidth(11);
        drawline(canvas, 0, 30, paint, 0);
 
        canvas->translate(SkIntToScalar(100), 0);
        drawline(canvas, 1, 30, paint, 0);
    }

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

• third_party/skia/gm/dashing.cpp