skia2/tests/GrShapeTest.cpp

1015 lines
43 KiB
C++

/*
* Copyright 2016 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include <initializer_list>
#include <functional>
#include "Test.h"
#if SK_SUPPORT_GPU
#include "GrShape.h"
#include "SkCanvas.h"
#include "SkDashPathEffect.h"
#include "SkPath.h"
#include "SkSurface.h"
using Key = SkTArray<uint32_t>;
static bool make_key(Key* key, const GrShape& shape) {
int size = shape.unstyledKeySize();
if (size <= 0) {
key->reset(0);
return false;
}
SkASSERT(size);
key->reset(size);
shape.writeUnstyledKey(key->begin());
return true;
}
static bool test_bounds_by_rasterizing(const SkPath& path, const SkRect& bounds) {
static constexpr int kRes = 2000;
// This tolerance is in units of 1/kRes fractions of the bounds width/height.
static constexpr int kTol = 0;
GR_STATIC_ASSERT(kRes % 4 == 0);
SkImageInfo info = SkImageInfo::MakeA8(kRes, kRes);
sk_sp<SkSurface> surface = SkSurface::MakeRaster(info);
surface->getCanvas()->clear(0x0);
SkRect clip = SkRect::MakeXYWH(kRes/4, kRes/4, kRes/2, kRes/2);
SkMatrix matrix;
matrix.setRectToRect(bounds, clip, SkMatrix::kFill_ScaleToFit);
clip.outset(SkIntToScalar(kTol), SkIntToScalar(kTol));
surface->getCanvas()->clipRect(clip, SkRegion::kDifference_Op);
surface->getCanvas()->concat(matrix);
SkPaint whitePaint;
whitePaint.setColor(SK_ColorWHITE);
surface->getCanvas()->drawPath(path, whitePaint);
SkPixmap pixmap;
surface->getCanvas()->peekPixels(&pixmap);
#if defined(SK_BUILD_FOR_WIN)
// The static constexpr version in #else causes cl.exe to crash.
const uint8_t* kZeros = reinterpret_cast<uint8_t*>(calloc(kRes, 1));
#else
static constexpr uint8_t kZeros[kRes] = {0};
#endif
for (int y = 0; y < kRes/4; ++y) {
const uint8_t* row = pixmap.addr8(0, y);
if (0 != memcmp(kZeros, row, kRes)) {
return false;
}
}
#ifdef SK_BUILD_FOR_WIN
free(const_cast<uint8_t*>(kZeros));
#endif
return true;
}
namespace {
class TestCase {
public:
template <typename GEO>
TestCase(const GEO& geo, const SkPaint& paint, skiatest::Reporter* r,
SkScalar scale = SK_Scalar1) : fBase(geo, paint) {
this->init(r, scale);
}
struct SelfExpectations {
bool fPEHasEffect;
bool fPEHasValidKey;
bool fStrokeApplies;
};
void testExpectations(skiatest::Reporter* reporter, SelfExpectations expectations) const;
enum ComparisonExpecation {
kAllDifferent_ComparisonExpecation,
kSameUpToPE_ComparisonExpecation,
kSameUpToStroke_ComparisonExpecation,
kAllSame_ComparisonExpecation,
};
void compare(skiatest::Reporter*, const TestCase& that, ComparisonExpecation) const;
const GrShape& baseShape() const { return fBase; }
const GrShape& appliedPathEffectShape() const { return fAppliedPE; }
const GrShape& appliedFullStyleShape() const { return fAppliedFull; }
// The returned array's count will be 0 if the key shape has no key.
const Key& baseKey() const { return fBaseKey; }
const Key& appliedPathEffectKey() const { return fAppliedPEKey; }
const Key& appliedFullStyleKey() const { return fAppliedFullKey; }
const Key& appliedPathEffectThenStrokeKey() const { return fAppliedPEThenStrokeKey; }
private:
static void CheckBounds(skiatest::Reporter* r, const GrShape& shape, const SkRect& bounds) {
SkPath path;
shape.asPath(&path);
// If the bounds are empty, the path ought to be as well.
if (bounds.isEmpty()) {
REPORTER_ASSERT(r, path.isEmpty());
return;
}
if (path.isEmpty()) {
return;
}
REPORTER_ASSERT(r, test_bounds_by_rasterizing(path, bounds));
}
void init(skiatest::Reporter* r, SkScalar scale) {
fAppliedPE = fBase.applyStyle(GrStyle::Apply::kPathEffectOnly, scale);
fAppliedPEThenStroke = fAppliedPE.applyStyle(GrStyle::Apply::kPathEffectAndStrokeRec,
scale);
fAppliedFull = fBase.applyStyle(GrStyle::Apply::kPathEffectAndStrokeRec, scale);
make_key(&fBaseKey, fBase);
make_key(&fAppliedPEKey, fAppliedPE);
make_key(&fAppliedPEThenStrokeKey, fAppliedPEThenStroke);
make_key(&fAppliedFullKey, fAppliedFull);
// Applying the path effect and then the stroke should always be the same as applying
// both in one go.
REPORTER_ASSERT(r, fAppliedPEThenStrokeKey == fAppliedFullKey);
SkPath a, b;
fAppliedPEThenStroke.asPath(&a);
fAppliedFull.asPath(&b);
REPORTER_ASSERT(r, a == b);
REPORTER_ASSERT(r, fAppliedFull.isEmpty() == fAppliedPEThenStroke.isEmpty());
SkPath path;
fBase.asPath(&path);
REPORTER_ASSERT(r, path.isEmpty() == fBase.isEmpty());
fAppliedPE.asPath(&path);
REPORTER_ASSERT(r, path.isEmpty() == fAppliedPE.isEmpty());
fAppliedFull.asPath(&path);
REPORTER_ASSERT(r, path.isEmpty() == fAppliedFull.isEmpty());
CheckBounds(r, fBase, fBase.bounds());
CheckBounds(r, fAppliedPE, fAppliedPE.bounds());
CheckBounds(r, fAppliedPEThenStroke, fAppliedPEThenStroke.bounds());
CheckBounds(r, fAppliedFull, fAppliedFull.bounds());
SkRect styledBounds;
fBase.styledBounds(&styledBounds);
CheckBounds(r, fAppliedFull, styledBounds);
fAppliedPE.styledBounds(&styledBounds);
CheckBounds(r, fAppliedFull, styledBounds);
// Check that the same path is produced when style is applied by GrShape and GrStyle.
SkPath preStyle;
SkPath postPathEffect;
SkPath postAllStyle;
fBase.asPath(&preStyle);
SkStrokeRec postPEStrokeRec(SkStrokeRec::kFill_InitStyle);
if (fBase.style().applyPathEffectToPath(&postPathEffect, &postPEStrokeRec, preStyle,
scale)) {
// run postPathEffect through GrShape to get any geometry reductions that would have
// occurred to fAppliedPE.
GrShape(postPathEffect, GrStyle(postPEStrokeRec, nullptr)).asPath(&postPathEffect);
SkPath testPath;
fAppliedPE.asPath(&testPath);
REPORTER_ASSERT(r, testPath == postPathEffect);
REPORTER_ASSERT(r, postPEStrokeRec.hasEqualEffect(fAppliedPE.style().strokeRec()));
}
SkStrokeRec::InitStyle fillOrHairline;
if (fBase.style().applyToPath(&postAllStyle, &fillOrHairline, preStyle, scale)) {
// run postPathEffect through GrShape to get any reductions that would have occurred
// to fAppliedFull.
GrShape(postAllStyle, GrStyle(fillOrHairline)).asPath(&postAllStyle);
SkPath testPath;
fAppliedFull.asPath(&testPath);
REPORTER_ASSERT(r, testPath == postAllStyle);
if (fillOrHairline == SkStrokeRec::kFill_InitStyle) {
REPORTER_ASSERT(r, fAppliedFull.style().isSimpleFill());
} else {
REPORTER_ASSERT(r, fAppliedFull.style().isSimpleHairline());
}
}
}
GrShape fBase;
GrShape fAppliedPE;
GrShape fAppliedPEThenStroke;
GrShape fAppliedFull;
Key fBaseKey;
Key fAppliedPEKey;
Key fAppliedPEThenStrokeKey;
Key fAppliedFullKey;
};
void TestCase::testExpectations(skiatest::Reporter* reporter, SelfExpectations expectations) const {
// The base's key should always be valid (unless the path is volatile)
REPORTER_ASSERT(reporter, fBaseKey.count());
if (expectations.fPEHasEffect) {
REPORTER_ASSERT(reporter, fBaseKey != fAppliedPEKey);
REPORTER_ASSERT(reporter, expectations.fPEHasValidKey == SkToBool(fAppliedPEKey.count()));
REPORTER_ASSERT(reporter, fBaseKey != fAppliedFullKey);
REPORTER_ASSERT(reporter, expectations.fPEHasValidKey == SkToBool(fAppliedFullKey.count()));
if (expectations.fStrokeApplies && expectations.fPEHasValidKey) {
REPORTER_ASSERT(reporter, fAppliedPEKey != fAppliedFullKey);
REPORTER_ASSERT(reporter, SkToBool(fAppliedFullKey.count()));
}
} else {
REPORTER_ASSERT(reporter, fBaseKey == fAppliedPEKey);
SkPath a, b;
fBase.asPath(&a);
fAppliedPE.asPath(&b);
REPORTER_ASSERT(reporter, a == b);
if (expectations.fStrokeApplies) {
REPORTER_ASSERT(reporter, fBaseKey != fAppliedFullKey);
} else {
REPORTER_ASSERT(reporter, fBaseKey == fAppliedFullKey);
}
}
}
void TestCase::compare(skiatest::Reporter* reporter, const TestCase& that,
ComparisonExpecation expectation) const {
SkPath a, b;
switch (expectation) {
case kAllDifferent_ComparisonExpecation:
REPORTER_ASSERT(reporter, fBaseKey != that.fBaseKey);
REPORTER_ASSERT(reporter, fAppliedPEKey != that.fAppliedPEKey);
REPORTER_ASSERT(reporter, fAppliedFullKey != that.fAppliedFullKey);
break;
case kSameUpToPE_ComparisonExpecation:
REPORTER_ASSERT(reporter, fBaseKey == that.fBaseKey);
fBase.asPath(&a);
that.fBase.asPath(&b);
REPORTER_ASSERT(reporter, a == b);
REPORTER_ASSERT(reporter, fBase.isEmpty() == that.fBase.isEmpty());
REPORTER_ASSERT(reporter, fAppliedPEKey != that.fAppliedPEKey);
REPORTER_ASSERT(reporter, fAppliedFullKey != that.fAppliedFullKey);
break;
case kSameUpToStroke_ComparisonExpecation:
REPORTER_ASSERT(reporter, fBaseKey == that.fBaseKey);
fBase.asPath(&a);
that.fBase.asPath(&b);
REPORTER_ASSERT(reporter, a == b);
REPORTER_ASSERT(reporter, fBase.isEmpty() == that.fBase.isEmpty());
REPORTER_ASSERT(reporter, fAppliedPEKey == that.fAppliedPEKey);
fAppliedPE.asPath(&a);
that.fAppliedPE.asPath(&b);
REPORTER_ASSERT(reporter, a == b);
REPORTER_ASSERT(reporter, fAppliedPE.isEmpty() == that.fAppliedPE.isEmpty());
REPORTER_ASSERT(reporter, fAppliedFullKey != that.fAppliedFullKey);
break;
case kAllSame_ComparisonExpecation:
REPORTER_ASSERT(reporter, fBaseKey == that.fBaseKey);
fBase.asPath(&a);
that.fBase.asPath(&b);
REPORTER_ASSERT(reporter, a == b);
REPORTER_ASSERT(reporter, fBase.isEmpty() == that.fBase.isEmpty());
REPORTER_ASSERT(reporter, fAppliedPEKey == that.fAppliedPEKey);
fAppliedPE.asPath(&a);
that.fAppliedPE.asPath(&b);
REPORTER_ASSERT(reporter, a == b);
REPORTER_ASSERT(reporter, fAppliedPE.isEmpty() == that.fAppliedPE.isEmpty());
REPORTER_ASSERT(reporter, fAppliedFullKey == that.fAppliedFullKey);
fAppliedFull.asPath(&a);
that.fAppliedFull.asPath(&b);
REPORTER_ASSERT(reporter, a == b);
REPORTER_ASSERT(reporter, fAppliedFull.isEmpty() == that.fAppliedFull.isEmpty());
break;
}
}
} // namespace
static sk_sp<SkPathEffect> make_dash() {
static const SkScalar kIntervals[] = { 0.25, 3.f, 0.5, 2.f };
static const SkScalar kPhase = 0.75;
return SkDashPathEffect::Make(kIntervals, SK_ARRAY_COUNT(kIntervals), kPhase);
}
static sk_sp<SkPathEffect> make_null_dash() {
static const SkScalar kNullIntervals[] = {0, 0, 0, 0, 0, 0};
return SkDashPathEffect::Make(kNullIntervals, SK_ARRAY_COUNT(kNullIntervals), 0.f);
}
template<typename GEO>
static void test_basic(skiatest::Reporter* reporter, const GEO& geo) {
sk_sp<SkPathEffect> dashPE = make_dash();
TestCase::SelfExpectations expectations;
SkPaint fill;
TestCase fillCase(geo, fill, reporter);
expectations.fPEHasEffect = false;
expectations.fPEHasValidKey = false;
expectations.fStrokeApplies = false;
fillCase.testExpectations(reporter, expectations);
// Test that another GrShape instance built from the same primitive is the same.
TestCase(geo, fill, reporter).compare(reporter, fillCase,
TestCase::kAllSame_ComparisonExpecation);
SkPaint stroke2RoundBevel;
stroke2RoundBevel.setStyle(SkPaint::kStroke_Style);
stroke2RoundBevel.setStrokeCap(SkPaint::kRound_Cap);
stroke2RoundBevel.setStrokeJoin(SkPaint::kBevel_Join);
stroke2RoundBevel.setStrokeWidth(2.f);
TestCase stroke2RoundBevelCase(geo, stroke2RoundBevel, reporter);
expectations.fPEHasValidKey = true;
expectations.fPEHasEffect = false;
expectations.fStrokeApplies = true;
stroke2RoundBevelCase.testExpectations(reporter, expectations);
TestCase(geo, stroke2RoundBevel, reporter).compare(reporter, stroke2RoundBevelCase,
TestCase::kAllSame_ComparisonExpecation);
SkPaint stroke2RoundBevelDash = stroke2RoundBevel;
stroke2RoundBevelDash.setPathEffect(make_dash());
TestCase stroke2RoundBevelDashCase(geo, stroke2RoundBevelDash, reporter);
expectations.fPEHasValidKey = true;
expectations.fPEHasEffect = true;
expectations.fStrokeApplies = true;
stroke2RoundBevelDashCase.testExpectations(reporter, expectations);
TestCase(geo, stroke2RoundBevelDash, reporter).compare(reporter, stroke2RoundBevelDashCase,
TestCase::kAllSame_ComparisonExpecation);
fillCase.compare(reporter, stroke2RoundBevelCase,
TestCase::kSameUpToStroke_ComparisonExpecation);
fillCase.compare(reporter, stroke2RoundBevelDashCase,
TestCase::kSameUpToPE_ComparisonExpecation);
stroke2RoundBevelCase.compare(reporter, stroke2RoundBevelDashCase,
TestCase::kSameUpToPE_ComparisonExpecation);
// Stroke and fill cases
SkPaint stroke2RoundBevelAndFill = stroke2RoundBevel;
stroke2RoundBevelAndFill.setStyle(SkPaint::kStrokeAndFill_Style);
TestCase stroke2RoundBevelAndFillCase(geo, stroke2RoundBevelAndFill, reporter);
expectations.fPEHasValidKey = true;
expectations.fPEHasEffect = false;
expectations.fStrokeApplies = true;
stroke2RoundBevelAndFillCase.testExpectations(reporter, expectations);
TestCase(geo, stroke2RoundBevelAndFill, reporter).compare(reporter,
stroke2RoundBevelAndFillCase, TestCase::kAllSame_ComparisonExpecation);
SkPaint stroke2RoundBevelAndFillDash = stroke2RoundBevelDash;
stroke2RoundBevelAndFillDash.setStyle(SkPaint::kStrokeAndFill_Style);
TestCase stroke2RoundBevelAndFillDashCase(geo, stroke2RoundBevelAndFillDash, reporter);
expectations.fPEHasValidKey = true;
expectations.fPEHasEffect = true;
expectations.fStrokeApplies = true;
stroke2RoundBevelAndFillDashCase.testExpectations(reporter, expectations);
TestCase(geo, stroke2RoundBevelAndFillDash, reporter).compare(
reporter, stroke2RoundBevelAndFillDashCase, TestCase::kAllSame_ComparisonExpecation);
stroke2RoundBevelAndFillCase.compare(reporter, stroke2RoundBevelCase,
TestCase::kSameUpToStroke_ComparisonExpecation);
stroke2RoundBevelAndFillDashCase.compare(reporter, stroke2RoundBevelDashCase,
TestCase::kSameUpToStroke_ComparisonExpecation);
stroke2RoundBevelAndFillCase.compare(reporter, stroke2RoundBevelAndFillDashCase,
TestCase::kSameUpToPE_ComparisonExpecation);
SkPaint hairline;
hairline.setStyle(SkPaint::kStroke_Style);
hairline.setStrokeWidth(0.f);
TestCase hairlineCase(geo, hairline, reporter);
// Since hairline style doesn't change the SkPath data, it is keyed identically to fill.
hairlineCase.compare(reporter, fillCase, TestCase::kAllSame_ComparisonExpecation);
REPORTER_ASSERT(reporter, hairlineCase.baseShape().style().isSimpleHairline());
REPORTER_ASSERT(reporter, hairlineCase.appliedFullStyleShape().style().isSimpleHairline());
REPORTER_ASSERT(reporter, hairlineCase.appliedPathEffectShape().style().isSimpleHairline());
}
template<typename GEO>
static void test_scale(skiatest::Reporter* reporter, const GEO& geo) {
sk_sp<SkPathEffect> dashPE = make_dash();
static const SkScalar kS1 = 1.f;
static const SkScalar kS2 = 2.f;
SkPaint fill;
TestCase fillCase1(geo, fill, reporter, kS1);
TestCase fillCase2(geo, fill, reporter, kS2);
// Scale doesn't affect fills.
fillCase1.compare(reporter, fillCase2, TestCase::kAllSame_ComparisonExpecation);
SkPaint hairline;
hairline.setStyle(SkPaint::kStroke_Style);
hairline.setStrokeWidth(0.f);
TestCase hairlineCase1(geo, hairline, reporter, kS1);
TestCase hairlineCase2(geo, hairline, reporter, kS2);
// Scale doesn't affect hairlines.
hairlineCase1.compare(reporter, hairlineCase2, TestCase::kAllSame_ComparisonExpecation);
SkPaint stroke;
stroke.setStyle(SkPaint::kStroke_Style);
stroke.setStrokeWidth(2.f);
TestCase strokeCase1(geo, stroke, reporter, kS1);
TestCase strokeCase2(geo, stroke, reporter, kS2);
// Scale affects the stroke.
strokeCase1.compare(reporter, strokeCase2, TestCase::kSameUpToStroke_ComparisonExpecation);
SkPaint strokeDash = stroke;
strokeDash.setPathEffect(make_dash());
TestCase strokeDashCase1(geo, strokeDash, reporter, kS1);
TestCase strokeDashCase2(geo, strokeDash, reporter, kS2);
// Scale affects the dash and the stroke.
strokeDashCase1.compare(reporter, strokeDashCase2, TestCase::kSameUpToPE_ComparisonExpecation);
// Stroke and fill cases
SkPaint strokeAndFill = stroke;
strokeAndFill.setStyle(SkPaint::kStrokeAndFill_Style);
TestCase strokeAndFillCase1(geo, strokeAndFill, reporter, kS1);
TestCase strokeAndFillCase2(geo, strokeAndFill, reporter, kS2);
// Scale affects the stroke. Though, this can wind up creating a rect when the input is a rect.
// In that case we wind up with a pure geometry key and the geometries are the same.
SkRRect rrect;
if (strokeAndFillCase1.appliedFullStyleShape().asRRect(&rrect)) {
// We currently only expect to get here in the rect->rect case.
REPORTER_ASSERT(reporter, rrect.isRect());
REPORTER_ASSERT(reporter, strokeAndFillCase1.baseShape().asRRect(&rrect) && rrect.isRect());
strokeAndFillCase1.compare(reporter, strokeAndFillCase2,
TestCase::kAllSame_ComparisonExpecation);
} else {
strokeAndFillCase1.compare(reporter, strokeAndFillCase2,
TestCase::kSameUpToStroke_ComparisonExpecation);
}
SkPaint strokeAndFillDash = strokeDash;
strokeAndFillDash.setStyle(SkPaint::kStrokeAndFill_Style);
TestCase strokeAndFillDashCase1(geo, strokeAndFillDash, reporter, kS1);
TestCase strokeAndFillDashCase2(geo, strokeAndFillDash, reporter, kS2);
// Scale affects the path effect and stroke.
strokeAndFillDashCase1.compare(reporter, strokeAndFillDashCase2,
TestCase::kSameUpToPE_ComparisonExpecation);
}
template <typename GEO, typename T>
static void test_stroke_param_impl(skiatest::Reporter* reporter, const GEO& geo,
std::function<void(SkPaint*, T)> setter, T a, T b,
bool paramAffectsStroke,
bool paramAffectsDashAndStroke) {
// Set the stroke width so that we don't get hairline. However, call the setter afterward so
// that it can override the stroke width.
SkPaint strokeA;
strokeA.setStyle(SkPaint::kStroke_Style);
strokeA.setStrokeWidth(2.f);
setter(&strokeA, a);
SkPaint strokeB;
strokeB.setStyle(SkPaint::kStroke_Style);
strokeB.setStrokeWidth(2.f);
setter(&strokeB, b);
TestCase strokeACase(geo, strokeA, reporter);
TestCase strokeBCase(geo, strokeB, reporter);
if (paramAffectsStroke) {
strokeACase.compare(reporter, strokeBCase, TestCase::kSameUpToStroke_ComparisonExpecation);
} else {
strokeACase.compare(reporter, strokeBCase, TestCase::kAllSame_ComparisonExpecation);
}
SkPaint strokeAndFillA = strokeA;
SkPaint strokeAndFillB = strokeB;
strokeAndFillA.setStyle(SkPaint::kStrokeAndFill_Style);
strokeAndFillB.setStyle(SkPaint::kStrokeAndFill_Style);
TestCase strokeAndFillACase(geo, strokeAndFillA, reporter);
TestCase strokeAndFillBCase(geo, strokeAndFillB, reporter);
if (paramAffectsStroke) {
strokeAndFillACase.compare(reporter, strokeAndFillBCase,
TestCase::kSameUpToStroke_ComparisonExpecation);
} else {
strokeAndFillACase.compare(reporter, strokeAndFillBCase,
TestCase::kAllSame_ComparisonExpecation);
}
// Make sure stroking params don't affect fill style.
SkPaint fillA = strokeA, fillB = strokeB;
fillA.setStyle(SkPaint::kFill_Style);
fillB.setStyle(SkPaint::kFill_Style);
TestCase fillACase(geo, fillA, reporter);
TestCase fillBCase(geo, fillB, reporter);
fillACase.compare(reporter, fillBCase, TestCase::kAllSame_ComparisonExpecation);
// Make sure just applying the dash but not stroke gives the same key for both stroking
// variations.
SkPaint dashA = strokeA, dashB = strokeB;
dashA.setPathEffect(make_dash());
dashB.setPathEffect(make_dash());
TestCase dashACase(geo, dashA, reporter);
TestCase dashBCase(geo, dashB, reporter);
if (paramAffectsDashAndStroke) {
dashACase.compare(reporter, dashBCase, TestCase::kSameUpToStroke_ComparisonExpecation);
} else {
dashACase.compare(reporter, dashBCase, TestCase::kAllSame_ComparisonExpecation);
}
SkPaint dashStrokeAndFillA = dashA, dashStrokeAndFillB = dashB;
dashStrokeAndFillA.setStyle(SkPaint::kStrokeAndFill_Style);
dashStrokeAndFillB.setStyle(SkPaint::kStrokeAndFill_Style);
TestCase dashStrokeAndFillACase(geo, dashStrokeAndFillA, reporter);
TestCase dashStrokeAndFillBCase(geo, dashStrokeAndFillB, reporter);
if (paramAffectsDashAndStroke) {
dashStrokeAndFillACase.compare(reporter, dashStrokeAndFillBCase,
TestCase::kSameUpToStroke_ComparisonExpecation);
} else {
dashStrokeAndFillACase.compare(reporter, dashStrokeAndFillBCase,
TestCase::kAllSame_ComparisonExpecation);
}
}
template <typename GEO, typename T>
static void test_stroke_param(skiatest::Reporter* reporter, const GEO& geo,
std::function<void(SkPaint*, T)> setter, T a, T b) {
test_stroke_param_impl(reporter, geo, setter, a, b, true, true);
};
template <typename GEO>
static void test_stroke_cap(skiatest::Reporter* reporter, const GEO& geo) {
GrShape shape(geo, GrStyle(SkStrokeRec::kHairline_InitStyle));
// The cap should only affect shapes that may be open.
bool affectsStroke = !shape.knownToBeClosed();
// Dashing adds ends that need caps.
bool affectsDashAndStroke = true;
test_stroke_param_impl<GEO, SkPaint::Cap>(
reporter,
geo,
[](SkPaint* p, SkPaint::Cap c) { p->setStrokeCap(c);},
SkPaint::kButt_Cap, SkPaint::kRound_Cap,
affectsStroke,
affectsDashAndStroke);
};
template <typename GEO>
static void test_miter_limit(skiatest::Reporter* reporter, const GEO& geo) {
auto setMiterJoinAndLimit = [](SkPaint* p, SkScalar miter) {
p->setStrokeJoin(SkPaint::kMiter_Join);
p->setStrokeMiter(miter);
};
auto setOtherJoinAndLimit = [](SkPaint* p, SkScalar miter) {
p->setStrokeJoin(SkPaint::kRound_Join);
p->setStrokeMiter(miter);
};
// The miter limit should affect stroked and dashed-stroked cases when the join type is
// miter.
test_stroke_param_impl<GEO, SkScalar>(
reporter,
geo,
setMiterJoinAndLimit,
0.5f, 0.75f,
true,
true);
// The miter limit should not affect stroked and dashed-stroked cases when the join type is
// not miter.
test_stroke_param_impl<GEO, SkScalar>(
reporter,
geo,
setOtherJoinAndLimit,
0.5f, 0.75f,
false,
false);
}
template<typename GEO>
static void test_dash_fill(skiatest::Reporter* reporter, const GEO& geo) {
// A dash with no stroke should have no effect
using DashFactoryFn = sk_sp<SkPathEffect>(*)();
for (DashFactoryFn md : {&make_dash, &make_null_dash}) {
SkPaint dashFill;
dashFill.setPathEffect((*md)());
TestCase dashFillCase(geo, dashFill, reporter);
TestCase fillCase(geo, SkPaint(), reporter);
dashFillCase.compare(reporter, fillCase, TestCase::kAllSame_ComparisonExpecation);
}
}
template<typename GEO>
void test_null_dash(skiatest::Reporter* reporter, const GEO& geo) {
SkPaint fill;
SkPaint stroke;
stroke.setStyle(SkPaint::kStroke_Style);
stroke.setStrokeWidth(1.f);
SkPaint dash;
dash.setStyle(SkPaint::kStroke_Style);
dash.setStrokeWidth(1.f);
dash.setPathEffect(make_dash());
SkPaint nullDash;
nullDash.setStyle(SkPaint::kStroke_Style);
nullDash.setStrokeWidth(1.f);
nullDash.setPathEffect(make_null_dash());
TestCase fillCase(geo, fill, reporter);
TestCase strokeCase(geo, stroke, reporter);
TestCase dashCase(geo, dash, reporter);
TestCase nullDashCase(geo, nullDash, reporter);
nullDashCase.compare(reporter, fillCase, TestCase::kSameUpToStroke_ComparisonExpecation);
nullDashCase.compare(reporter, strokeCase, TestCase::kAllSame_ComparisonExpecation);
nullDashCase.compare(reporter, dashCase, TestCase::kSameUpToPE_ComparisonExpecation);
}
template <typename GEO>
void test_path_effect_makes_rrect(skiatest::Reporter* reporter, const GEO& geo) {
/**
* This path effect takes any input path and turns it into a rrect. It passes through stroke
* info.
*/
class RRectPathEffect : SkPathEffect {
public:
static const SkRRect& RRect() {
static const SkRRect kRRect = SkRRect::MakeRectXY(SkRect::MakeWH(12, 12), 3, 5);
return kRRect;
}
bool filterPath(SkPath* dst, const SkPath& src, SkStrokeRec*,
const SkRect* cullR) const override {
dst->reset();
dst->addRRect(RRect());
return true;
}
void computeFastBounds(SkRect* dst, const SkRect& src) const override {
*dst = RRect().getBounds();
}
static sk_sp<SkPathEffect> Make() { return sk_sp<SkPathEffect>(new RRectPathEffect); }
Factory getFactory() const override { return nullptr; }
void toString(SkString*) const override {}
private:
RRectPathEffect() {}
};
SkPaint fill;
TestCase fillGeoCase(geo, fill, reporter);
SkPaint pe;
pe.setPathEffect(RRectPathEffect::Make());
TestCase geoPECase(geo, pe, reporter);
SkPaint peStroke;
peStroke.setPathEffect(RRectPathEffect::Make());
peStroke.setStrokeWidth(2.f);
peStroke.setStyle(SkPaint::kStroke_Style);
TestCase geoPEStrokeCase(geo, peStroke, reporter);
fillGeoCase.compare(reporter, geoPECase, TestCase::kSameUpToPE_ComparisonExpecation);
fillGeoCase.compare(reporter, geoPEStrokeCase, TestCase::kSameUpToPE_ComparisonExpecation);
geoPECase.compare(reporter, geoPEStrokeCase,
TestCase::kSameUpToStroke_ComparisonExpecation);
TestCase rrectFillCase(RRectPathEffect::RRect(), fill, reporter);
SkPaint stroke = peStroke;
stroke.setPathEffect(nullptr);
TestCase rrectStrokeCase(RRectPathEffect::RRect(), stroke, reporter);
SkRRect rrect;
// Applying the path effect should make a SkRRect shape. There is no further stroking in the
// geoPECase, so the full style should be the same as just the PE.
REPORTER_ASSERT(reporter, geoPECase.appliedPathEffectShape().asRRect(&rrect));
REPORTER_ASSERT(reporter, rrect == RRectPathEffect::RRect());
REPORTER_ASSERT(reporter, geoPECase.appliedPathEffectKey() == rrectFillCase.baseKey());
REPORTER_ASSERT(reporter, geoPECase.appliedFullStyleShape().asRRect(&rrect));
REPORTER_ASSERT(reporter, rrect == RRectPathEffect::RRect());
REPORTER_ASSERT(reporter, geoPECase.appliedFullStyleKey() == rrectFillCase.baseKey());
// In the PE+stroke case applying the full style should be the same as just stroking the rrect.
REPORTER_ASSERT(reporter, geoPEStrokeCase.appliedPathEffectShape().asRRect(&rrect));
REPORTER_ASSERT(reporter, rrect == RRectPathEffect::RRect());
REPORTER_ASSERT(reporter, geoPEStrokeCase.appliedPathEffectKey() == rrectFillCase.baseKey());
REPORTER_ASSERT(reporter, !geoPEStrokeCase.appliedFullStyleShape().asRRect(&rrect));
REPORTER_ASSERT(reporter, geoPEStrokeCase.appliedFullStyleKey() ==
rrectStrokeCase.appliedFullStyleKey());
}
template <typename GEO>
void test_unknown_path_effect(skiatest::Reporter* reporter, const GEO& geo) {
/**
* This path effect just adds two lineTos to the input path.
*/
class AddLineTosPathEffect : SkPathEffect {
public:
bool filterPath(SkPath* dst, const SkPath& src, SkStrokeRec*,
const SkRect* cullR) const override {
*dst = src;
dst->lineTo(0, 0);
dst->lineTo(10, 10);
return true;
}
void computeFastBounds(SkRect* dst, const SkRect& src) const override {
*dst = src;
dst->growToInclude(0, 0);
dst->growToInclude(10, 10);
}
static sk_sp<SkPathEffect> Make() { return sk_sp<SkPathEffect>(new AddLineTosPathEffect); }
Factory getFactory() const override { return nullptr; }
void toString(SkString*) const override {}
private:
AddLineTosPathEffect() {}
};
// This path effect should make the keys invalid when it is applied. We only produce a path
// effect key for dash path effects. So the only way another arbitrary path effect can produce
// a styled result with a key is to produce a non-path shape that has a purely geometric key.
SkPaint peStroke;
peStroke.setPathEffect(AddLineTosPathEffect::Make());
peStroke.setStrokeWidth(2.f);
peStroke.setStyle(SkPaint::kStroke_Style);
TestCase geoPEStrokeCase(geo, peStroke, reporter);
TestCase::SelfExpectations expectations;
expectations.fPEHasEffect = true;
expectations.fPEHasValidKey = false;
expectations.fStrokeApplies = true;
geoPEStrokeCase.testExpectations(reporter, expectations);
}
template <typename GEO>
void test_make_hairline_path_effect(skiatest::Reporter* reporter, const GEO& geo, bool isNonPath) {
/**
* This path effect just changes the stroke rec to hairline.
*/
class MakeHairlinePathEffect : SkPathEffect {
public:
bool filterPath(SkPath* dst, const SkPath& src, SkStrokeRec* strokeRec,
const SkRect* cullR) const override {
*dst = src;
strokeRec->setHairlineStyle();
return true;
}
void computeFastBounds(SkRect* dst, const SkRect& src) const override { *dst = src; }
static sk_sp<SkPathEffect> Make() {
return sk_sp<SkPathEffect>(new MakeHairlinePathEffect);
}
Factory getFactory() const override { return nullptr; }
void toString(SkString*) const override {}
private:
MakeHairlinePathEffect() {}
};
SkPaint fill;
SkPaint pe;
pe.setPathEffect(MakeHairlinePathEffect::Make());
TestCase peCase(geo, pe, reporter);
SkPath a, b;
peCase.baseShape().asPath(&a);
peCase.appliedPathEffectShape().asPath(&b);
REPORTER_ASSERT(reporter, a == b);
peCase.appliedFullStyleShape().asPath(&b);
REPORTER_ASSERT(reporter, a == b);
REPORTER_ASSERT(reporter, peCase.appliedPathEffectShape().style().isSimpleHairline());
REPORTER_ASSERT(reporter, peCase.appliedFullStyleShape().style().isSimpleHairline());
if (isNonPath) {
REPORTER_ASSERT(reporter, peCase.appliedPathEffectKey() == peCase.baseKey());
REPORTER_ASSERT(reporter, peCase.appliedFullStyleKey() == peCase.baseKey());
} else {
REPORTER_ASSERT(reporter, peCase.appliedPathEffectKey().empty());
REPORTER_ASSERT(reporter, peCase.appliedFullStyleKey().empty());
}
}
/**
* isNonPath indicates whether the initial shape made from the path is expected to be recognized
* as a simpler shape type (e.g. rrect)
*/
void test_volatile_path(skiatest::Reporter* reporter, const SkPath& path,
bool isNonPath) {
SkPath vPath(path);
vPath.setIsVolatile(true);
SkPaint dashAndStroke;
dashAndStroke.setPathEffect(make_dash());
dashAndStroke.setStrokeWidth(2.f);
dashAndStroke.setStyle(SkPaint::kStroke_Style);
TestCase volatileCase(vPath, dashAndStroke, reporter);
// We expect a shape made from a volatile path to have a key iff the shape is recognized
// as a specialized geometry.
if (isNonPath) {
REPORTER_ASSERT(reporter, SkToBool(volatileCase.baseKey().count()));
// In this case all the keys should be identical to the non-volatile case.
TestCase nonVolatileCase(path, dashAndStroke, reporter);
volatileCase.compare(reporter, nonVolatileCase, TestCase::kAllSame_ComparisonExpecation);
} else {
// None of the keys should be valid.
REPORTER_ASSERT(reporter, !SkToBool(volatileCase.baseKey().count()));
REPORTER_ASSERT(reporter, !SkToBool(volatileCase.appliedPathEffectKey().count()));
REPORTER_ASSERT(reporter, !SkToBool(volatileCase.appliedFullStyleKey().count()));
REPORTER_ASSERT(reporter, !SkToBool(volatileCase.appliedPathEffectThenStrokeKey().count()));
}
}
template <typename GEO>
void test_path_effect_makes_empty_shape(skiatest::Reporter* reporter, const GEO& geo) {
/**
* This path effect returns an empty path.
*/
class EmptyPathEffect : SkPathEffect {
public:
bool filterPath(SkPath* dst, const SkPath& src, SkStrokeRec*,
const SkRect* cullR) const override {
dst->reset();
return true;
}
void computeFastBounds(SkRect* dst, const SkRect& src) const override {
dst->setEmpty();
}
static sk_sp<SkPathEffect> Make() { return sk_sp<SkPathEffect>(new EmptyPathEffect); }
Factory getFactory() const override { return nullptr; }
void toString(SkString*) const override {}
private:
EmptyPathEffect() {}
};
SkPath emptyPath;
GrShape emptyShape(emptyPath);
Key emptyKey;
make_key(&emptyKey, emptyShape);
REPORTER_ASSERT(reporter, emptyShape.isEmpty());
SkPaint pe;
pe.setPathEffect(EmptyPathEffect::Make());
TestCase geoCase(geo, pe, reporter);
REPORTER_ASSERT(reporter, geoCase.appliedFullStyleKey() == emptyKey);
REPORTER_ASSERT(reporter, geoCase.appliedPathEffectKey() == emptyKey);
REPORTER_ASSERT(reporter, geoCase.appliedPathEffectThenStrokeKey() == emptyKey);
REPORTER_ASSERT(reporter, geoCase.appliedPathEffectShape().isEmpty());
REPORTER_ASSERT(reporter, geoCase.appliedFullStyleShape().isEmpty());
SkPaint peStroke;
peStroke.setPathEffect(EmptyPathEffect::Make());
peStroke.setStrokeWidth(2.f);
peStroke.setStyle(SkPaint::kStroke_Style);
TestCase geoPEStrokeCase(geo, peStroke, reporter);
REPORTER_ASSERT(reporter, geoPEStrokeCase.appliedFullStyleKey() == emptyKey);
REPORTER_ASSERT(reporter, geoPEStrokeCase.appliedPathEffectKey() == emptyKey);
REPORTER_ASSERT(reporter, geoPEStrokeCase.appliedPathEffectThenStrokeKey() == emptyKey);
REPORTER_ASSERT(reporter, geoPEStrokeCase.appliedPathEffectShape().isEmpty());
REPORTER_ASSERT(reporter, geoPEStrokeCase.appliedFullStyleShape().isEmpty());
}
void test_empty_shape(skiatest::Reporter* reporter) {
SkPath emptyPath;
SkPaint fill;
TestCase fillEmptyCase(emptyPath, fill, reporter);
REPORTER_ASSERT(reporter, fillEmptyCase.baseShape().isEmpty());
REPORTER_ASSERT(reporter, fillEmptyCase.appliedPathEffectShape().isEmpty());
REPORTER_ASSERT(reporter, fillEmptyCase.appliedFullStyleShape().isEmpty());
Key emptyKey(fillEmptyCase.baseKey());
REPORTER_ASSERT(reporter, emptyKey.count());
TestCase::SelfExpectations expectations;
expectations.fStrokeApplies = false;
expectations.fPEHasEffect = false;
// This will test whether applying style preserves emptiness
fillEmptyCase.testExpectations(reporter, expectations);
// Stroking an empty path should have no effect
SkPath emptyPath2;
SkPaint stroke;
stroke.setStrokeWidth(2.f);
stroke.setStyle(SkPaint::kStroke_Style);
TestCase strokeEmptyCase(emptyPath2, stroke, reporter);
strokeEmptyCase.compare(reporter, fillEmptyCase, TestCase::kAllSame_ComparisonExpecation);
// Dashing and stroking an empty path should have no effect
SkPath emptyPath3;
SkPaint dashAndStroke;
dashAndStroke.setPathEffect(make_dash());
dashAndStroke.setStrokeWidth(2.f);
dashAndStroke.setStyle(SkPaint::kStroke_Style);
TestCase dashAndStrokeEmptyCase(emptyPath3, dashAndStroke, reporter);
dashAndStrokeEmptyCase.compare(reporter, fillEmptyCase,
TestCase::kAllSame_ComparisonExpecation);
// A shape made from an empty rrect should behave the same as an empty path.
SkRRect emptyRRect = SkRRect::MakeRect(SkRect::MakeEmpty());
REPORTER_ASSERT(reporter, emptyRRect.getType() == SkRRect::kEmpty_Type);
TestCase dashAndStrokeEmptyRRectCase(emptyRRect, dashAndStroke, reporter);
dashAndStrokeEmptyRRectCase.compare(reporter, fillEmptyCase,
TestCase::kAllSame_ComparisonExpecation);
// Same for a rect.
SkRect emptyRect = SkRect::MakeEmpty();
TestCase dashAndStrokeEmptyRectCase(emptyRect, dashAndStroke, reporter);
dashAndStrokeEmptyRectCase.compare(reporter, fillEmptyCase,
TestCase::kAllSame_ComparisonExpecation);
}
DEF_TEST(GrShape, reporter) {
sk_sp<SkPathEffect> dashPE = make_dash();
for (auto rr : { SkRRect::MakeRect(SkRect::MakeWH(10, 10)),
SkRRect::MakeRectXY(SkRect::MakeWH(10, 10), 3, 4)}) {
test_basic(reporter, rr);
test_scale(reporter, rr);
test_dash_fill(reporter, rr);
test_null_dash(reporter, rr);
// Test modifying various stroke params.
test_stroke_param<SkRRect, SkScalar>(
reporter, rr,
[](SkPaint* p, SkScalar w) { p->setStrokeWidth(w);},
SkIntToScalar(2), SkIntToScalar(4));
test_stroke_param<SkRRect, SkPaint::Join>(
reporter, rr,
[](SkPaint* p, SkPaint::Join j) { p->setStrokeJoin(j);},
SkPaint::kMiter_Join, SkPaint::kRound_Join);
test_stroke_cap(reporter, rr);
test_miter_limit(reporter, rr);
test_path_effect_makes_rrect(reporter, rr);
test_unknown_path_effect(reporter, rr);
test_path_effect_makes_empty_shape(reporter, rr);
test_make_hairline_path_effect(reporter, rr, true);
}
struct TestPath {
TestPath(const SkPath& path, bool isRRectFill, bool isRRectStroke ,const SkRRect& rrect)
: fPath(path)
, fIsRRectForFill(isRRectFill)
, fIsRRectForStroke(isRRectStroke)
, fRRect(rrect) {}
SkPath fPath;
bool fIsRRectForFill;
bool fIsRRectForStroke;
SkRRect fRRect;
};
SkTArray<TestPath> paths;
SkPath circlePath;
circlePath.addCircle(10, 10, 10);
paths.emplace_back(circlePath, true, true, SkRRect::MakeOval(SkRect::MakeWH(20,20)));
SkPath rectPath;
rectPath.addRect(SkRect::MakeWH(10, 10));
paths.emplace_back(rectPath, true, true, SkRRect::MakeRect(SkRect::MakeWH(10, 10)));
SkPath openRectPath;
openRectPath.moveTo(0, 0);
openRectPath.lineTo(10, 0);
openRectPath.lineTo(10, 10);
openRectPath.lineTo(0, 10);
paths.emplace_back(openRectPath, true, false, SkRRect::MakeRect(SkRect::MakeWH(10, 10)));
SkPath quadPath;
quadPath.quadTo(10, 10, 5, 8);
paths.emplace_back(quadPath, false, false, SkRRect());
for (auto testPath : paths) {
const SkPath& path = testPath.fPath;
// These tests all assume that the original GrShape for fill and stroke will be the same.
// However, that is not the case in special cases (e.g. a unclosed rect becomes a RRect
// GrShape with a fill style but becomes a Path GrShape when stroked).
if (testPath.fIsRRectForFill == testPath.fIsRRectForStroke) {
test_basic(reporter, path);
test_null_dash(reporter, path);
test_path_effect_makes_rrect(reporter, path);
}
test_scale(reporter, path);
// This test uses a stroking paint, hence use of fIsRRectForStroke
test_volatile_path(reporter, path, testPath.fIsRRectForStroke);
test_dash_fill(reporter, path);
// Test modifying various stroke params.
test_stroke_param<SkPath, SkScalar>(
reporter, path,
[](SkPaint* p, SkScalar w) { p->setStrokeWidth(w);},
SkIntToScalar(2), SkIntToScalar(4));
test_stroke_param<SkPath, SkPaint::Join>(
reporter, path,
[](SkPaint* p, SkPaint::Join j) { p->setStrokeJoin(j);},
SkPaint::kMiter_Join, SkPaint::kRound_Join);
test_stroke_cap(reporter, path);
test_miter_limit(reporter, path);
test_unknown_path_effect(reporter, path);
test_path_effect_makes_empty_shape(reporter, path);
test_make_hairline_path_effect(reporter, path, testPath.fIsRRectForStroke);
SkPaint fillPaint;
TestCase fillPathCase(path, fillPaint, reporter);
SkRRect rrect;
REPORTER_ASSERT(reporter, testPath.fIsRRectForFill ==
fillPathCase.baseShape().asRRect(&rrect));
if (testPath.fIsRRectForFill) {
REPORTER_ASSERT(reporter, rrect == testPath.fRRect);
TestCase fillRRectCase(rrect, fillPaint, reporter);
fillPathCase.compare(reporter, fillRRectCase, TestCase::kAllSame_ComparisonExpecation);
}
SkPaint strokePaint;
strokePaint.setStrokeWidth(3.f);
strokePaint.setStyle(SkPaint::kStroke_Style);
TestCase strokePathCase(path, strokePaint, reporter);
REPORTER_ASSERT(reporter, testPath.fIsRRectForStroke ==
strokePathCase.baseShape().asRRect(&rrect));
if (testPath.fIsRRectForStroke) {
REPORTER_ASSERT(reporter, rrect == testPath.fRRect);
TestCase strokeRRectCase(rrect, strokePaint, reporter);
strokePathCase.compare(reporter, strokeRRectCase,
TestCase::kAllSame_ComparisonExpecation);
}
}
// Test a volatile empty path.
test_volatile_path(reporter, SkPath(), true);
test_empty_shape(reporter);
}
#endif