skiagm::PolygonOffsetGM Class Reference

Inheritance diagram for skiagm::PolygonOffsetGM:

Public Member Functions
	PolygonOffsetGM (bool convexOnly)
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
bool	runAsBench () const override
void	drawPolygon (SkCanvas *canvas, int index, SkPoint *position)
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

Static Protected Member Functions
static void	GetConvexPolygon (int index, SkPathDirection dir, std::unique_ptr< SkPoint[]> *data, int *numPts)
static void	GetSimplePolygon (int index, SkPathDirection dir, std::unique_ptr< SkPoint[]> *data, int *numPts)

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 424 of file polygonoffset.cpp.

Constructor & Destructor Documentation

PolygonOffsetGM()

skiagm::PolygonOffsetGM::PolygonOffsetGM ( bool  convexOnly )

inline

Definition at line 426 of file polygonoffset.cpp.

        : fConvexOnly(convexOnly) {
        this->setBGColor(0xFFFFFFFF);
    }

Member Function Documentation

drawPolygon()

void skiagm::PolygonOffsetGM::drawPolygon ( SkCanvas *  canvas, int  index, SkPoint *  position  )

inlineprotected

Definition at line 511 of file polygonoffset.cpp.

                                                                     {
 
        SkPoint center;
        {
            std::unique_ptr<SkPoint[]> data(nullptr);
            int numPts;
            if (fConvexOnly) {
                GetConvexPolygon(index, SkPathDirection::kCW, &data, &numPts);
            } else {
                GetSimplePolygon(index, SkPathDirection::kCW, &data, &numPts);
            }
            SkRect bounds;
            bounds.setBounds(data.get(), numPts);
            if (!fConvexOnly) {
                bounds.outset(kMaxOutset, kMaxOutset);
            }
            if (position->fX + bounds.width() > kGMWidth) {
                position->fX = 0;
                position->fY += kMaxPathHeight;
            }
            center = { position->fX + SkScalarHalf(bounds.width()), position->fY };
            position->fX += bounds.width();
        }
 
        const SkPathDirection dirs[2] = { SkPathDirection::kCW, SkPathDirection::kCCW };
        const float insets[] = { 5, 10, 15, 20, 25, 30, 35, 40 };
        const float offsets[] = { 2, 5, 9, 14, 20, 27, 35, 44, -2, -5, -9 };
        const SkColor colors[] = { 0xFF901313, 0xFF8D6214, 0xFF698B14, 0xFF1C8914,
                                   0xFF148755, 0xFF146C84, 0xFF142482, 0xFF4A1480,
                                   0xFF901313, 0xFF8D6214, 0xFF698B14 };
 
        SkPaint paint;
        paint.setAntiAlias(true);
        paint.setStyle(SkPaint::kStroke_Style);
        paint.setStrokeWidth(1);
 
        std::unique_ptr<SkPoint[]> data(nullptr);
        int numPts;
        if (fConvexOnly) {
            GetConvexPolygon(index, dirs[index % 2], &data, &numPts);
        } else {
            GetSimplePolygon(index, dirs[index % 2], &data, &numPts);
        }
 
        {
            SkPath path;
            path.moveTo(data.get()[0]);
            for (int i = 1; i < numPts; ++i) {
                path.lineTo(data.get()[i]);
            }
            path.close();
            canvas->save();
            canvas->translate(center.fX, center.fY);
            canvas->drawPath(path, paint);
            canvas->restore();
        }
 
        SkTDArray<SkPoint> offsetPoly;
        size_t count = fConvexOnly ? std::size(insets) : std::size(offsets);
        for (size_t i = 0; i < count; ++i) {
            SkScalar offset = fConvexOnly ? insets[i] : offsets[i];
            std::function<SkScalar(const SkPoint&)> offsetFunc;
 
            bool result;
            if (fConvexOnly) {
                result = SkInsetConvexPolygon(data.get(), numPts, offset, &offsetPoly);
            } else {
                SkRect bounds;
                bounds.setBoundsCheck(data.get(), numPts);
                result = SkOffsetSimplePolygon(data.get(), numPts, bounds, offset, &offsetPoly);
            }
            if (result) {
                SkPath path;
                path.moveTo(offsetPoly[0]);
                for (int j = 1; j < offsetPoly.size(); ++j) {
                    path.lineTo(offsetPoly[j]);
                }
                path.close();
 
                paint.setColor(ToolUtils::color_to_565(colors[i]));
                canvas->save();
                canvas->translate(center.fX, center.fY);
                canvas->drawPath(path, paint);
                canvas->restore();
            }
        }
    }

GetConvexPolygon()

static void skiagm::PolygonOffsetGM::GetConvexPolygon ( int  index, SkPathDirection  dir, std::unique_ptr< SkPoint[]> *  data, int *  numPts  )

inlinestaticprotected

Definition at line 442 of file polygonoffset.cpp.

                                                                              {
        if (index < (int)std::size(PolygonOffsetData::gConvexPoints)) {
            // manually specified
            *numPts = (int)PolygonOffsetData::gConvexSizes[index];
            *data = std::make_unique<SkPoint[]>(*numPts);
            if (SkPathDirection::kCW == dir) {
                for (int i = 0; i < *numPts; ++i) {
                    (*data)[i] = PolygonOffsetData::gConvexPoints[index][i];
                }
            } else {
                for (int i = 0; i < *numPts; ++i) {
                    (*data)[i] = PolygonOffsetData::gConvexPoints[index][*numPts - i - 1];
                }
            }
        } else {
            // procedurally generated
            SkScalar width = kMaxPathHeight / 2;
            SkScalar height = kMaxPathHeight / 2;
            int numPtsArray[] = { 3, 4, 5, 5, 6, 8, 8, 20, 100 };
 
            size_t arrayIndex = index - std::size(PolygonOffsetData::gConvexPoints);
            SkASSERT(arrayIndex < std::size(numPtsArray));
            *numPts = numPtsArray[arrayIndex];
            if (arrayIndex == 3 || arrayIndex == 6) {
                // squashed pentagon and octagon
                width = kMaxPathHeight / 5;
            }
 
            *data = std::make_unique<SkPoint[]>(*numPts);
 
            create_ngon(*numPts, data->get(), width, height, dir);
        }
    }

getISize()

SkISize skiagm::PolygonOffsetGM::getISize ( )

inlineoverrideprotectedvirtual

Implements skiagm::GM.

Definition at line 439 of file polygonoffset.cpp.

{ return SkISize::Make(kGMWidth, kGMHeight); }

getName()

SkString skiagm::PolygonOffsetGM::getName ( ) const

inlineoverrideprotectedvirtual

Implements skiagm::GM.

Definition at line 432 of file polygonoffset.cpp.

                                      {
        if (fConvexOnly) {
            return SkString("convex-polygon-inset");
        } else {
            return SkString("simple-polygon-offset");
        }
    }

GetSimplePolygon()

static void skiagm::PolygonOffsetGM::GetSimplePolygon ( int  index, SkPathDirection  dir, std::unique_ptr< SkPoint[]> *  data, int *  numPts  )

inlinestaticprotected

Definition at line 477 of file polygonoffset.cpp.

                                                                              {
        if (index < (int)std::size(PolygonOffsetData::gSimplePoints)) {
            // manually specified
            *numPts = (int)PolygonOffsetData::gSimpleSizes[index];
            *data = std::make_unique<SkPoint[]>(*numPts);
            if (SkPathDirection::kCW == dir) {
                for (int i = 0; i < *numPts; ++i) {
                    (*data)[i] = PolygonOffsetData::gSimplePoints[index][i];
                }
            } else {
                for (int i = 0; i < *numPts; ++i) {
                    (*data)[i] = PolygonOffsetData::gSimplePoints[index][*numPts - i - 1];
                }
            }
        } else {
            // procedurally generated
            SkScalar width = kMaxPathHeight / 2;
            SkScalar height = kMaxPathHeight / 2;
            int numPtsArray[] = { 5, 7, 8, 20, 100 };
 
            size_t arrayIndex = index - std::size(PolygonOffsetData::gSimplePoints);
            arrayIndex = std::min(arrayIndex, std::size(numPtsArray) - 1);
            SkASSERT(arrayIndex < std::size(numPtsArray));
            *numPts = numPtsArray[arrayIndex];
            // squash horizontally
            width = kMaxPathHeight / 5;
 
            *data = std::make_unique<SkPoint[]>(*numPts);
 
            create_ngon(*numPts, data->get(), width, height, dir);
        }
    }

onDraw()

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

inlineoverrideprotectedvirtual

Reimplemented from skiagm::GM.

Definition at line 599 of file polygonoffset.cpp.

                                           {
        // the right edge of the last drawn path
        SkPoint offset = { 0, SkScalarHalf(kMaxPathHeight) };
        if (!fConvexOnly) {
            offset.fY += kMaxOutset;
        }
 
        for (int i = 0; i < kNumPaths; ++i) {
            this->drawPolygon(canvas, i, &offset);
        }
    }

runAsBench()

bool skiagm::PolygonOffsetGM::runAsBench ( ) const

inlineoverrideprotectedvirtual

Reimplemented from skiagm::GM.

Definition at line 440 of file polygonoffset.cpp.

{ return true; }

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

• third_party/skia/gm/polygonoffset.cpp