skiagm::DstReadShuffle Class Reference

Inheritance diagram for skiagm::DstReadShuffle:

Public Member Functions
	DstReadShuffle ()
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 Types
enum	ShapeType {   kCircle_ShapeType , kRoundRect_ShapeType , kRect_ShapeType , kConvexPath_ShapeType ,   kConcavePath_ShapeType , kText_ShapeType , kNumShapeTypes }

Protected Member Functions
SkString	getName () const override
SkISize	getISize () override
void	drawShape (SkCanvas *canvas, SkPaint *paint, ShapeType type)
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 SkColor	GetColor (SkRandom *random)
static void	DrawHairlines (SkCanvas *canvas)

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

Renders overlapping shapes with colorburn against a checkerboard.

Definition at line 36 of file dstreadshuffle.cpp.

Member Enumeration Documentation

ShapeType

enum skiagm::DstReadShuffle::ShapeType

protected

Enumerator
kCircle_ShapeType
kRoundRect_ShapeType
kRect_ShapeType
kConvexPath_ShapeType
kConcavePath_ShapeType
kText_ShapeType
kNumShapeTypes

Definition at line 41 of file dstreadshuffle.cpp.

                   {
        kCircle_ShapeType,
        kRoundRect_ShapeType,
        kRect_ShapeType,
        kConvexPath_ShapeType,
        kConcavePath_ShapeType,
        kText_ShapeType,
        kNumShapeTypes
    };

Constructor & Destructor Documentation

DstReadShuffle()

skiagm::DstReadShuffle::DstReadShuffle ( )

inline

Definition at line 38 of file dstreadshuffle.cpp.

{ this->setBGColor(kBackground); }

Member Function Documentation

DrawHairlines()

static void skiagm::DstReadShuffle::DrawHairlines ( SkCanvas *  canvas )

inlinestaticprotected

Definition at line 115 of file dstreadshuffle.cpp.

                                                {
        if (canvas->imageInfo().alphaType() == kOpaque_SkAlphaType) {
            canvas->clear(kBackground);
        } else {
            canvas->clear(SK_ColorTRANSPARENT);
        }
        SkPaint hairPaint;
        hairPaint.setStyle(SkPaint::kStroke_Style);
        hairPaint.setStrokeWidth(0);
        hairPaint.setAntiAlias(true);
        static constexpr int kNumHairlines = 12;
        SkPoint pts[] = {{3.f, 7.f}, {29.f, 7.f}};
        SkRandom colorRandom;
        SkMatrix rot;
        rot.setRotate(360.f / kNumHairlines, 15.5f, 12.f);
        rot.postTranslate(3.f, 0);
        for (int i = 0; i < 12; ++i) {
            hairPaint.setColor(GetColor(&colorRandom));
            canvas->drawLine(pts[0], pts[1], hairPaint);
            rot.mapPoints(pts, 2);
        }
    }

drawShape()

void skiagm::DstReadShuffle::drawShape ( SkCanvas *  canvas, SkPaint *  paint, ShapeType  type  )

inlineprotected

Definition at line 55 of file dstreadshuffle.cpp.

                                                                     {
        const SkRect kRect = SkRect::MakeXYWH(0, 0, 75.f, 85.f);
        switch (type) {
            case kCircle_ShapeType:
                canvas->drawCircle(kRect.centerX(), kRect.centerY(), kRect.width() / 2.f, *paint);
                break;
            case kRoundRect_ShapeType:
                canvas->drawRoundRect(kRect, 15.f, 15.f, *paint);
                break;
            case kRect_ShapeType:
                canvas->drawRect(kRect, *paint);
                break;
            case kConvexPath_ShapeType:
                if (fConvexPath.isEmpty()) {
                    SkPoint points[4];
                    kRect.toQuad(points);
                    fConvexPath = SkPathBuilder().moveTo(points[0])
                                                 .quadTo(points[1], points[2])
                                                 .quadTo(points[3], points[0])
                                                 .detach();
                    SkASSERT(fConvexPath.isConvex());
                }
                canvas->drawPath(fConvexPath, *paint);
                break;
            case kConcavePath_ShapeType:
                if (fConcavePath.isEmpty()) {
                    SkPathBuilder b;
                    SkPoint points[5] = {{50.f, 0.f}};
                    SkMatrix rot;
                    rot.setRotate(360.f / 5, 50.f, 70.f);
                    for (int i = 1; i < 5; ++i) {
                        rot.mapPoints(points + i, points + i - 1, 1);
                    }
                    b.moveTo(points[0]);
                    for (int i = 0; i < 5; ++i) {
                        b.lineTo(points[(2 * i) % 5]);
                    }
                    fConcavePath = b.setFillType(SkPathFillType::kEvenOdd)
                                    .detach();
                    SkASSERT(!fConcavePath.isConvex());
                }
                canvas->drawPath(fConcavePath, *paint);
                break;
            case kText_ShapeType: {
                const char* text = "N";
                SkFont      font(ToolUtils::DefaultPortableTypeface(), 100);
                font.setEmbolden(true);
                canvas->drawString(text, 0.f, 100.f, font, *paint);
                break;
            }
            default:
                break;
        }
    }

GetColor()

static SkColor skiagm::DstReadShuffle::GetColor ( SkRandom *  random )

inlinestaticprotected

Definition at line 110 of file dstreadshuffle.cpp.

                                              {
        SkColor color = ToolUtils::color_to_565(random->nextU() | 0xFF000000);
        return SkColorSetA(color, 0x80);
    }

getISize()

SkISize skiagm::DstReadShuffle::getISize ( )

inlineoverrideprotectedvirtual

Implements skiagm::GM.

Definition at line 53 of file dstreadshuffle.cpp.

{ return SkISize::Make(530, 680); }

getName()

SkString skiagm::DstReadShuffle::getName ( ) const

inlineoverrideprotectedvirtual

Implements skiagm::GM.

Definition at line 51 of file dstreadshuffle.cpp.

{ return SkString("dstreadshuffle"); }

onDraw()

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

inlineoverrideprotectedvirtual

Reimplemented from skiagm::GM.

Definition at line 138 of file dstreadshuffle.cpp.

                                           {
        SkScalar y = 5;
        for (int i = 0; i < kNumShapeTypes; i++) {
            SkRandom colorRandom;
            ShapeType shapeType = static_cast<ShapeType>(i);
            SkScalar x = 5;
            for (int r = 0; r <= 15; r++) {
                SkPaint p;
                p.setAntiAlias(true);
                p.setColor(GetColor(&colorRandom));
                // In order to get some op combining on the GPU backend we do 2 src over
                // for each xfer mode which requires a dst read
                p.setBlendMode(r % 3 == 0 ? SkBlendMode::kColorBurn : SkBlendMode::kSrcOver);
                canvas->save();
                canvas->translate(x, y);
                this->drawShape(canvas, &p, shapeType);
                canvas->restore();
                x += 15;
            }
            y += 110;
        }
        // Draw hairlines to a surface and then draw that to the main canvas with a zoom so that
        // it is easier to see how they blend.
        SkImageInfo info;
        // Recording canvases don't have a color type.
        if (SkColorType::kUnknown_SkColorType == canvas->imageInfo().colorType()) {
            info = SkImageInfo::MakeN32Premul(35, 35);
        } else {
            info = SkImageInfo::Make(35, 35,
                                     canvas->imageInfo().colorType(),
                                     canvas->imageInfo().alphaType(),
                                     canvas->imageInfo().refColorSpace());
        }
        auto surf = canvas->makeSurface(info);
        if (!surf) {
            // Fall back to raster. Raster supports only one of the 8 bit per-channel RGBA or BGRA
            // formats. This fall back happens when running with --preAbandonGpuContext.
            if ((info.colorType() == kRGBA_8888_SkColorType ||
                 info.colorType() == kBGRA_8888_SkColorType) &&
                info.colorType() != kN32_SkColorType) {
                info = SkImageInfo::Make(35, 35,
                                         kN32_SkColorType,
                                         canvas->imageInfo().alphaType(),
                                         canvas->imageInfo().refColorSpace());
            }
            surf = SkSurfaces::Raster(info);
            SkASSERT(surf);
        }
        canvas->scale(5.f, 5.f);
        canvas->translate(67.f, 10.f);
        DrawHairlines(surf->getCanvas());
        canvas->drawImage(surf->makeImageSnapshot(), 0.f, 0.f);
    }

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

• third_party/skia/gm/dstreadshuffle.cpp