skiagm::AARectEffect Class Reference

Inheritance diagram for skiagm::AARectEffect:

Public Member Functions
	AARectEffect ()

Protected Member Functions
SkString	getName () const override
SkISize	getISize () override
void	onOnceBeforeDraw () override
DrawResult	onDraw (GrRecordingContext *rContext, SkCanvas *canvas, SkString *errorMsg) override

Detailed Description

This GM directly exercises a GrProcessor that clips against rects.

Definition at line 38 of file aarecteffect.cpp.

Constructor & Destructor Documentation

AARectEffect()

skiagm::AARectEffect::AARectEffect ( )

inline

Definition at line 40 of file aarecteffect.cpp.

{ this->setBGColor(0xFFFFFFFF); }

Member Function Documentation

getISize()

SkISize skiagm::AARectEffect::getISize ( )

inlineoverrideprotected

Definition at line 45 of file aarecteffect.cpp.

{ return SkISize::Make(210, 250); }

getName()

SkString skiagm::AARectEffect::getName ( ) const

inlineoverrideprotected

Definition at line 43 of file aarecteffect.cpp.

{ return SkString("aa_rect_effect"); }

onDraw()

DrawResult skiagm::AARectEffect::onDraw ( GrRecordingContext *  rContext, SkCanvas *  canvas, SkString *  errorMsg  )

inlineoverrideprotected

Definition at line 49 of file aarecteffect.cpp.

                                                                                                   {
        auto sdc = skgpu::ganesh::TopDeviceSurfaceDrawContext(canvas);
        if (!sdc) {
            *errorMsg = kErrorMsg_DrawSkippedGpuOnly;
            return DrawResult::kSkip;
        }
 
        SkScalar y = 12.f;
        static constexpr SkScalar kDX = 12.f;
        static constexpr SkScalar kOutset = 5.f;
 
        static constexpr SkRect kRects[] = {
                // integer edges
                SkRect::MakeLTRB(5.f, 1.f, 30.f, 25.f),
                // half-integer edges
                SkRect::MakeLTRB(5.5f, 0.5f, 29.5f, 24.5f),
                // vertically/horizontally thin rects that cover pixel centers
                SkRect::MakeLTRB(5.25f, 0.5f, 5.75f, 24.5f),
                SkRect::MakeLTRB(5.5f,  0.5f, 29.5f, 0.75f),
                // vertically/horizontally thin rects that don't cover pixel centers
                SkRect::MakeLTRB(5.55f, 0.5f, 5.75f, 24.5f),
                SkRect::MakeLTRB(5.5f, .05f, 29.5f, .25f),
                // small in x and y
                SkRect::MakeLTRB(5.05f, .55f, 5.45f, .85f),
        };
 
        for (auto r : kRects) {
            SkScalar x = kDX;
 
            for (int et = 0; et < kGrClipEdgeTypeCnt; ++et) {
                SkRect rect = r.makeOffset(x, y);
                GrClipEdgeType edgeType = static_cast<GrClipEdgeType>(et);
                auto fp = GrFragmentProcessor::Rect(/*inputFP=*/nullptr, edgeType, rect);
                SkASSERT(fp);
 
                GrPaint grPaint;
                grPaint.setColor4f({ 0, 0, 0, 1.f });
                grPaint.setXPFactory(GrPorterDuffXPFactory::Get(SkBlendMode::kSrc));
                grPaint.setCoverageFragmentProcessor(std::move(fp));
                auto drawRect = rect.makeOutset(kOutset, kOutset);
                auto op = sk_gpu_test::test_ops::MakeRect(rContext, std::move(grPaint), drawRect);
                sdc->addDrawOp(std::move(op));
 
                x += SkScalarCeilToScalar(rect.width() + kDX);
            }
 
            // Draw rect without and with AA using normal API for reference
            canvas->save();
            canvas->translate(x, y);
            SkPaint paint;
            canvas->drawRect(r, paint);
            x += SkScalarCeilToScalar(r.width() + kDX);
            paint.setAntiAlias(true);
            canvas->drawRect(r, paint);
            canvas->restore();
 
            y += SkScalarCeilToScalar(r.height() + 20.f);
        }
 
        return DrawResult::kOk;
    }

onOnceBeforeDraw()

void skiagm::AARectEffect::onOnceBeforeDraw ( )

inlineoverrideprotected

Definition at line 47 of file aarecteffect.cpp.

{}

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

• third_party/skia/gm/aarecteffect.cpp