skiagm::ConvexPolyClip Class Reference

Inheritance diagram for skiagm::ConvexPolyClip:

Public Member Functions
	ConvexPolyClip ()
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)
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
SkISize	getISize () override
void	onOnceBeforeDraw () override
void	onDraw (SkCanvas *canvas) override
bool	runAsBench () const override
Protected Member Functions inherited from skiagm::GM
virtual DrawResult	onGpuSetup (SkCanvas *, SkString *, GraphiteTestContext *)
virtual void	onGpuTeardown ()
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

This GM tests convex polygon clips.

Definition at line 94 of file convexpolyclip.cpp.

Constructor & Destructor Documentation

ConvexPolyClip()

skiagm::ConvexPolyClip::ConvexPolyClip ( )

inline

Definition at line 96 of file convexpolyclip.cpp.

                     {
        this->setBGColor(0xFFFFFFFF);
    }

Member Function Documentation

getISize()

SkISize skiagm::ConvexPolyClip::getISize ( )

inlineoverrideprotectedvirtual

Implements skiagm::GM.

Definition at line 103 of file convexpolyclip.cpp.

                                {
        // When benchmarking the saveLayer set of draws is skipped.
        int w = 435;
        if (kBench_Mode != this->getMode()) {
            w *= 2;
        }
        return SkISize::Make(w, 540);
    }

getName()

SkString skiagm::ConvexPolyClip::getName ( ) const

inlineoverrideprotectedvirtual

Implements skiagm::GM.

Definition at line 101 of file convexpolyclip.cpp.

{ return SkString("convex_poly_clip"); }

onDraw()

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

inlineoverrideprotectedvirtual

Reimplemented from skiagm::GM.

Definition at line 155 of file convexpolyclip.cpp.

                                           {
        SkScalar y = 0;
        constexpr SkScalar kMargin = 10.f;
 
        SkPaint bgPaint;
        bgPaint.setAlpha(0x15);
        SkISize size = canvas->getBaseLayerSize();
        canvas->drawImageRect(fImg, SkRect::MakeIWH(size.fWidth, size.fHeight),
                              SkSamplingOptions(), &bgPaint);
 
        constexpr char kTxt[] = "Clip Me!";
        SkFont         font(ToolUtils::DefaultPortableTypeface(), 23);
        SkScalar textW = font.measureText(kTxt, std::size(kTxt)-1, SkTextEncoding::kUTF8);
        SkPaint txtPaint;
        txtPaint.setColor(SK_ColorDKGRAY);
 
        SkScalar startX = 0;
        int testLayers = kBench_Mode != this->getMode();
        for (int doLayer = 0; doLayer <= testLayers; ++doLayer) {
            for (const Clip& clip : fClips) {
                SkScalar x = startX;
                for (int aa = 0; aa < 2; ++aa) {
                    if (doLayer) {
                        SkRect bounds;
                        clip.getBounds(&bounds);
                        bounds.outset(2, 2);
                        bounds.offset(x, y);
                        canvas->saveLayer(&bounds, nullptr);
                    } else {
                        canvas->save();
                    }
                    canvas->translate(x, y);
                    clip.setOnCanvas(canvas, SkClipOp::kIntersect, SkToBool(aa));
                    canvas->drawImage(fImg, 0, 0);
                    canvas->restore();
                    x += fImg->width() + kMargin;
                }
                for (int aa = 0; aa < 2; ++aa) {
 
                    SkPaint clipOutlinePaint;
                    clipOutlinePaint.setAntiAlias(true);
                    clipOutlinePaint.setColor(0x50505050);
                    clipOutlinePaint.setStyle(SkPaint::kStroke_Style);
                    clipOutlinePaint.setStrokeWidth(0);
 
                    if (doLayer) {
                        SkRect bounds;
                        clip.getBounds(&bounds);
                        bounds.outset(2, 2);
                        bounds.offset(x, y);
                        canvas->saveLayer(&bounds, nullptr);
                    } else {
                        canvas->save();
                    }
                    canvas->translate(x, y);
                    SkPath closedClipPath = clip.asClosedPath();
                    canvas->drawPath(closedClipPath, clipOutlinePaint);
                    clip.setOnCanvas(canvas, SkClipOp::kIntersect, SkToBool(aa));
                    canvas->scale(1.f, 1.8f);
                    canvas->drawSimpleText(kTxt, std::size(kTxt)-1, SkTextEncoding::kUTF8,
                                     0, 1.5f * font.getSize(), font, txtPaint);
                    canvas->restore();
                    x += textW + 2 * kMargin;
                }
                y += fImg->height() + kMargin;
            }
            y = 0;
            startX += 2 * fImg->width() + SkScalarCeilToInt(2 * textW) + 6 * kMargin;
        }
    }

onOnceBeforeDraw()

void skiagm::ConvexPolyClip::onOnceBeforeDraw ( )

inlineoverrideprotectedvirtual

Reimplemented from skiagm::GM.

Definition at line 112 of file convexpolyclip.cpp.

                                     {
        // On < c++17, emplace_back() returns a void :(
        auto emplace_back = [](std::vector<Clip>& clips) -> Clip& {
            clips.emplace_back();
            return clips.back();
        };
 
        emplace_back(fClips).setPath(SkPath::Polygon({
            {  5.f,   5.f},
            {100.f,  20.f},
            { 15.f, 100.f},
        }, false));
 
        SkPathBuilder hexagon;
        constexpr SkScalar kRadius = 45.f;
        const SkPoint center = { kRadius, kRadius };
        for (int i = 0; i < 6; ++i) {
            SkScalar angle = 2 * SK_ScalarPI * i / 6;
            SkPoint point = { SkScalarCos(angle), SkScalarSin(angle) };
            point.scale(kRadius);
            point = center + point;
            if (0 == i) {
                hexagon.moveTo(point);
            } else {
                hexagon.lineTo(point);
            }
        }
        emplace_back(fClips).setPath(hexagon.snapshot());
 
        SkMatrix scaleM;
        scaleM.setScale(1.1f, 0.4f, kRadius, kRadius);
        emplace_back(fClips).setPath(hexagon.detach().makeTransform(scaleM));
 
        emplace_back(fClips).setRect(SkRect::MakeXYWH(8.3f, 11.6f, 78.2f, 72.6f));
 
        SkRect rect = SkRect::MakeLTRB(10.f, 12.f, 80.f, 86.f);
        SkMatrix rotM;
        rotM.setRotate(23.f, rect.centerX(), rect.centerY());
        emplace_back(fClips).setPath(SkPath::Rect(rect).makeTransform(rotM));
 
        fImg = make_img(100, 100);
    }

runAsBench()

bool skiagm::ConvexPolyClip::runAsBench ( ) const

inlineoverrideprotectedvirtual

Reimplemented from skiagm::GM.

Definition at line 226 of file convexpolyclip.cpp.

{ return true; }

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

• third_party/skia/gm/convexpolyclip.cpp