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gerrit-public.fairphone.software / platform / external / skqp / 99c9796dde4cae3c71d0381256fea04eea48218e / . / tests / GrShapeTest.cpp
blob: 847e52288112dd82223fd6ae83a11de52dbf0b82 [file] [log] [blame]
/*
* 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 "SkPathOps.h"
#include "SkSurface.h"
#include "SkClipOpPriv.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 paths_fill_same(const SkPath& a, const SkPath& b) {
SkPath pathXor;
Op(a, b, SkPathOp::kXOR_SkPathOp, &pathXor);
return pathXor.isEmpty();
}
static bool test_bounds_by_rasterizing(const SkPath& path, const SkRect& bounds) {
// We test the bounds by rasterizing the path into a kRes by kRes grid. The bounds is
// mapped to the range kRes/4 to 3*kRes/4 in x and y. A difference clip is used to avoid
// rendering within the bounds (with a tolerance). Then we render the path and check that
// everything got clipped out.
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, kDifference_SkClipOp);
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; ++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 {
/**
* Geo is a factory for creating a GrShape from another representation. It also answers some
* questions about expected behavior for GrShape given the inputs.
*/
class Geo {
public:
virtual ~Geo() {}
virtual GrShape makeShape(const SkPaint&) const = 0;
virtual SkPath path() const = 0;
// These functions allow tests to check for special cases where style gets
// applied by GrShape in its constructor (without calling GrShape::applyStyle).
// These unfortunately rely on knowing details of GrShape's implementation.
// These predicates are factored out here to avoid littering the rest of the
// test code with GrShape implementation details.
virtual bool fillChangesGeom() const { return false; }
virtual bool strokeIsConvertedToFill() const { return false; }
virtual bool strokeAndFillIsConvertedToFill(const SkPaint&) const { return false; }
// Is this something we expect GrShape to recognize as something simpler than a path.
virtual bool isNonPath(const SkPaint& paint) const { return true; }
};
class RectGeo : public Geo {
public:
RectGeo(const SkRect& rect) : fRect(rect) {}
SkPath path() const override {
SkPath path;
path.addRect(fRect);
return path;
}
GrShape makeShape(const SkPaint& paint) const override {
return GrShape(fRect, paint);
}
bool strokeAndFillIsConvertedToFill(const SkPaint& paint) const override {
SkASSERT(paint.getStyle() == SkPaint::kStrokeAndFill_Style);
// Converted to an outset rectangle.
return paint.getStrokeJoin() == SkPaint::kMiter_Join &&
paint.getStrokeMiter() >= SK_ScalarSqrt2;
}
private:
SkRect fRect;
};
class RRectGeo : public Geo {
public:
RRectGeo(const SkRRect& rrect) : fRRect(rrect) {}
GrShape makeShape(const SkPaint& paint) const override {
return GrShape(fRRect, paint);
}
SkPath path() const override {
SkPath path;
path.addRRect(fRRect);
return path;
}
bool strokeAndFillIsConvertedToFill(const SkPaint& paint) const override {
SkASSERT(paint.getStyle() == SkPaint::kStrokeAndFill_Style);
if (fRRect.isRect()) {
return RectGeo(fRRect.rect()).strokeAndFillIsConvertedToFill(paint);
}
return false;
}
private:
SkRRect fRRect;
};
class PathGeo : public Geo {
public:
enum class Invert { kNo, kYes };
PathGeo(const SkPath& path, Invert invert) : fPath(path) {
SkASSERT(!path.isInverseFillType());
if (Invert::kYes == invert) {
if (fPath.getFillType() == SkPath::kEvenOdd_FillType) {
fPath.setFillType(SkPath::kInverseEvenOdd_FillType);
} else {
SkASSERT(fPath.getFillType() == SkPath::kWinding_FillType);
fPath.setFillType(SkPath::kInverseWinding_FillType);
}
}
}
GrShape makeShape(const SkPaint& paint) const override {
return GrShape(fPath, paint);
}
SkPath path() const override { return fPath; }
bool fillChangesGeom() const override {
// unclosed rects get closed. Lines get turned into empty geometry
return this->isUnclosedRect() || (fPath.isLine(nullptr) && !fPath.isInverseFillType());
}
bool strokeIsConvertedToFill() const override {
return this->isAxisAlignedLine();
}
bool strokeAndFillIsConvertedToFill(const SkPaint& paint) const override {
SkASSERT(paint.getStyle() == SkPaint::kStrokeAndFill_Style);
if (this->isAxisAlignedLine()) {
// The fill is ignored (zero area) and the stroke is converted to a rrect.
return true;
}
SkRect rect;
unsigned start;
SkPath::Direction dir;
if (SkPathPriv::IsSimpleClosedRect(fPath, &rect, &dir, &start)) {
return RectGeo(rect).strokeAndFillIsConvertedToFill(paint);
}
return false;
}
bool isNonPath(const SkPaint& paint) const override {
return fPath.isLine(nullptr) || fPath.isEmpty();
}
private:
bool isAxisAlignedLine() const {
SkPoint pts[2];
if (!fPath.isLine(pts)) {
return false;
}
return pts[0].fX == pts[1].fX || pts[0].fY == pts[1].fY;
}
bool isUnclosedRect() const {
bool closed;
return fPath.isRect(nullptr, &closed, nullptr) && !closed;
}
SkPath fPath;
};
class RRectPathGeo : public PathGeo {
public:
enum class RRectForStroke { kNo, kYes };
RRectPathGeo(const SkPath& path, const SkRRect& equivalentRRect, RRectForStroke rrectForStroke,
Invert invert)
: PathGeo(path, invert)
, fRRect(equivalentRRect)
, fRRectForStroke(rrectForStroke) {}
RRectPathGeo(const SkPath& path, const SkRect& equivalentRect, RRectForStroke rrectForStroke,
Invert invert)
: RRectPathGeo(path, SkRRect::MakeRect(equivalentRect), rrectForStroke, invert) {}
bool isNonPath(const SkPaint& paint) const override {
if (SkPaint::kFill_Style == paint.getStyle() || RRectForStroke::kYes == fRRectForStroke) {
return true;
}
return false;
}
const SkRRect& rrect() const { return fRRect; }
private:
SkRRect fRRect;
RRectForStroke fRRectForStroke;
};
class TestCase {
public:
TestCase(const Geo& geo, const SkPaint& paint, skiatest::Reporter* r,
SkScalar scale = SK_Scalar1) : fBase(geo.makeShape(paint)) {
this->init(r, scale);
}
template<typename... ShapeArgs>
TestCase(skiatest::Reporter* r, ShapeArgs... shapeArgs)
: fBase(shapeArgs...) {
this->init(r, SK_Scalar1);
}
TestCase(const GrShape& shape, skiatest::Reporter* r, SkScalar scale = SK_Scalar1)
: fBase(shape) {
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.fLeft > bounds.fRight || bounds.fTop > bounds.fBottom) {
REPORTER_ASSERT(r, path.isEmpty());
return;
}
if (path.isEmpty()) {
return;
}
// The bounds API explicitly calls out that it does not consider inverseness.
SkPath p = path;
p.setFillType(SkPath::ConvertToNonInverseFillType(path.getFillType()));
REPORTER_ASSERT(r, test_bounds_by_rasterizing(p, 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);
// If the output of the path effect is a rrect then it is possible for a and b to be
// different paths that fill identically. The reason is that fAppliedFull will do this:
// base -> apply path effect -> rrect_as_path -> stroke -> stroked_rrect_as_path
// fAppliedPEThenStroke will have converted the rrect_as_path back to a rrect. However,
// now that there is no longer a path effect, the direction and starting index get
// canonicalized before the stroke.
if (fAppliedPE.asRRect(nullptr, nullptr, nullptr, nullptr)) {
REPORTER_ASSERT(r, paths_fill_same(a, b));
} else {
REPORTER_ASSERT(r, a == b);
}
REPORTER_ASSERT(r, fAppliedFull.isEmpty() == fAppliedPEThenStroke.isEmpty());
SkPath path;
fBase.asPath(&path);
REPORTER_ASSERT(r, path.isEmpty() == fBase.isEmpty());
REPORTER_ASSERT(r, path.getSegmentMasks() == fBase.segmentMask());
fAppliedPE.asPath(&path);
REPORTER_ASSERT(r, path.isEmpty() == fAppliedPE.isEmpty());
REPORTER_ASSERT(r, path.getSegmentMasks() == fAppliedPE.segmentMask());
fAppliedFull.asPath(&path);
REPORTER_ASSERT(r, path.isEmpty() == fAppliedFull.isEmpty());
REPORTER_ASSERT(r, path.getSegmentMasks() == fAppliedFull.segmentMask());
CheckBounds(r, fBase, fBase.bounds());
CheckBounds(r, fAppliedPE, fAppliedPE.bounds());
CheckBounds(r, fAppliedPEThenStroke, fAppliedPEThenStroke.bounds());
CheckBounds(r, fAppliedFull, fAppliedFull.bounds());
SkRect styledBounds = fBase.styledBounds();
CheckBounds(r, fAppliedFull, styledBounds);
styledBounds = fAppliedPE.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)) {
SkPath testPath;
fAppliedFull.asPath(&testPath);
if (fBase.style().hasPathEffect()) {
// Because GrShape always does two-stage application when there is a path effect
// there may be a reduction/canonicalization step between the path effect and
// strokerec not reflected in postAllStyle since it applied both the path effect
// and strokerec without analyzing the intermediate path.
REPORTER_ASSERT(r, paths_fill_same(postAllStyle, testPath));
} else {
// Make sure that postAllStyle sees any reductions/canonicalizations that GrShape
// would apply.
GrShape(postAllStyle, GrStyle(fillOrHairline)).asPath(&postAllStyle);
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);
}
}
}
static bool can_interchange_winding_and_even_odd_fill(const GrShape& shape) {
SkPath path;
shape.asPath(&path);
if (shape.style().hasNonDashPathEffect()) {
return false;
}
const SkStrokeRec::Style strokeRecStyle = shape.style().strokeRec().getStyle();
return strokeRecStyle == SkStrokeRec::kStroke_Style ||
strokeRecStyle == SkStrokeRec::kHairline_Style ||
(shape.style().isSimpleFill() && path.isConvex());
}
static void check_equivalence(skiatest::Reporter* r, const GrShape& a, const GrShape& b,
const Key& keyA, const Key& keyB) {
// GrShape only respects the input winding direction and start point for rrect shapes
// when there is a path effect. Thus, if there are two GrShapes representing the same rrect
// but one has a path effect in its style and the other doesn't then asPath() and the unstyled
// key will differ. GrShape will have canonicalized the direction and start point for the shape
// without the path effect. If *both* have path effects then they should have both preserved
// the direction and starting point.
// The asRRect() output params are all initialized just to silence compiler warnings about
// uninitialized variables.
SkRRect rrectA = SkRRect::MakeEmpty(), rrectB = SkRRect::MakeEmpty();
SkPath::Direction dirA = SkPath::kCW_Direction, dirB = SkPath::kCW_Direction;
unsigned startA = ~0U, startB = ~0U;
bool invertedA = true, invertedB = true;
bool aIsRRect = a.asRRect(&rrectA, &dirA, &startA, &invertedA);
bool bIsRRect = b.asRRect(&rrectB, &dirB, &startB, &invertedB);
bool aHasPE = a.style().hasPathEffect();
bool bHasPE = b.style().hasPathEffect();
bool allowSameRRectButDiffStartAndDir = (aIsRRect && bIsRRect) && (aHasPE != bHasPE);
// GrShape will close paths with simple fill style.
bool allowedClosednessDiff = (a.style().isSimpleFill() != b.style().isSimpleFill());
SkPath pathA, pathB;
a.asPath(&pathA);
b.asPath(&pathB);
// Having a dash path effect can allow 'a' but not 'b' to turn a inverse fill type into a
// non-inverse fill type (or vice versa).
bool ignoreInversenessDifference = false;
if (pathA.isInverseFillType() != pathB.isInverseFillType()) {
const GrShape* s1 = pathA.isInverseFillType() ? &a : &b;
const GrShape* s2 = pathA.isInverseFillType() ? &b : &a;
bool canDropInverse1 = s1->style().isDashed();
bool canDropInverse2 = s2->style().isDashed();
ignoreInversenessDifference = (canDropInverse1 != canDropInverse2);
}
bool ignoreWindingVsEvenOdd = false;
if (SkPath::ConvertToNonInverseFillType(pathA.getFillType()) !=
SkPath::ConvertToNonInverseFillType(pathB.getFillType())) {
bool aCanChange = can_interchange_winding_and_even_odd_fill(a);
bool bCanChange = can_interchange_winding_and_even_odd_fill(b);
if (aCanChange != bCanChange) {
ignoreWindingVsEvenOdd = true;
}
}
if (allowSameRRectButDiffStartAndDir) {
REPORTER_ASSERT(r, rrectA == rrectB);
REPORTER_ASSERT(r, paths_fill_same(pathA, pathB));
REPORTER_ASSERT(r, ignoreInversenessDifference || invertedA == invertedB);
} else {
SkPath pA = pathA;
SkPath pB = pathB;
REPORTER_ASSERT(r, a.inverseFilled() == pA.isInverseFillType());
REPORTER_ASSERT(r, b.inverseFilled() == pB.isInverseFillType());
if (ignoreInversenessDifference) {
pA.setFillType(SkPath::ConvertToNonInverseFillType(pathA.getFillType()));
pB.setFillType(SkPath::ConvertToNonInverseFillType(pathB.getFillType()));
}
if (ignoreWindingVsEvenOdd) {
pA.setFillType(pA.isInverseFillType() ? SkPath::kInverseEvenOdd_FillType
: SkPath::kEvenOdd_FillType);
pB.setFillType(pB.isInverseFillType() ? SkPath::kInverseEvenOdd_FillType
: SkPath::kEvenOdd_FillType);
}
if (!ignoreInversenessDifference && !ignoreWindingVsEvenOdd) {
REPORTER_ASSERT(r, keyA == keyB);
} else {
REPORTER_ASSERT(r, keyA != keyB);
}
if (allowedClosednessDiff) {
// GrShape will close paths with simple fill style. Make the non-filled path closed
// so that the comparision will succeed. Make sure both are closed before comparing.
pA.close();
pB.close();
}
REPORTER_ASSERT(r, pA == pB);
REPORTER_ASSERT(r, aIsRRect == bIsRRect);
if (aIsRRect) {
REPORTER_ASSERT(r, rrectA == rrectB);
REPORTER_ASSERT(r, dirA == dirB);
REPORTER_ASSERT(r, startA == startB);
REPORTER_ASSERT(r, ignoreInversenessDifference || invertedA == invertedB);
}
}
REPORTER_ASSERT(r, a.isEmpty() == b.isEmpty());
REPORTER_ASSERT(r, allowedClosednessDiff || a.knownToBeClosed() == b.knownToBeClosed());
// closedness can affect convexity.
REPORTER_ASSERT(r, allowedClosednessDiff || a.knownToBeConvex() == b.knownToBeConvex());
if (a.knownToBeConvex()) {
REPORTER_ASSERT(r, pathA.isConvex());
}
if (b.knownToBeConvex()) {
REPORTER_ASSERT(r, pathB.isConvex());
}
REPORTER_ASSERT(r, a.bounds() == b.bounds());
REPORTER_ASSERT(r, a.segmentMask() == b.segmentMask());
// Init these to suppress warnings.
SkPoint pts[4] {{0, 0,}, {0, 0}, {0, 0}, {0, 0}} ;
bool invertedLine[2] {true, true};
REPORTER_ASSERT(r, a.asLine(pts, &invertedLine[0]) == b.asLine(pts + 2, &invertedLine[1]));
// mayBeInverseFilledAfterStyling() is allowed to differ if one has a arbitrary PE and the other
// doesn't (since the PE can set any fill type on its output path).
// Moreover, dash style explicitly ignores inverseness. So if one is dashed but not the other
// then they may disagree about inverseness.
if (a.style().hasNonDashPathEffect() == b.style().hasNonDashPathEffect() &&
a.style().isDashed() == b.style().isDashed()) {
REPORTER_ASSERT(r, a.mayBeInverseFilledAfterStyling() ==
b.mayBeInverseFilledAfterStyling());
}
if (a.asLine(nullptr, nullptr)) {
REPORTER_ASSERT(r, pts[2] == pts[0] && pts[3] == pts[1]);
REPORTER_ASSERT(r, ignoreInversenessDifference || invertedLine[0] == invertedLine[1]);
REPORTER_ASSERT(r, invertedLine[0] == a.inverseFilled());
REPORTER_ASSERT(r, invertedLine[1] == b.inverseFilled());
}
REPORTER_ASSERT(r, ignoreInversenessDifference || a.inverseFilled() == b.inverseFilled());
}
void TestCase::compare(skiatest::Reporter* r, const TestCase& that,
ComparisonExpecation expectation) const {
SkPath a, b;
switch (expectation) {
case kAllDifferent_ComparisonExpecation:
REPORTER_ASSERT(r, fBaseKey != that.fBaseKey);
REPORTER_ASSERT(r, fAppliedPEKey != that.fAppliedPEKey);
REPORTER_ASSERT(r, fAppliedFullKey != that.fAppliedFullKey);
break;
case kSameUpToPE_ComparisonExpecation:
check_equivalence(r, fBase, that.fBase, fBaseKey, that.fBaseKey);
REPORTER_ASSERT(r, fAppliedPEKey != that.fAppliedPEKey);
REPORTER_ASSERT(r, fAppliedFullKey != that.fAppliedFullKey);
break;
case kSameUpToStroke_ComparisonExpecation:
check_equivalence(r, fBase, that.fBase, fBaseKey, that.fBaseKey);
check_equivalence(r, fAppliedPE, that.fAppliedPE, fAppliedPEKey, that.fAppliedPEKey);
REPORTER_ASSERT(r, fAppliedFullKey != that.fAppliedFullKey);
break;
case kAllSame_ComparisonExpecation:
check_equivalence(r, fBase, that.fBase, fBaseKey, that.fBaseKey);
check_equivalence(r, fAppliedPE, that.fAppliedPE, fAppliedPEKey, that.fAppliedPEKey);
check_equivalence(r, fAppliedFull, that.fAppliedFull, fAppliedFullKey,
that.fAppliedFullKey);
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);
}
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 = !geo.strokeIsConvertedToFill();
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);
if (geo.fillChangesGeom() || geo.strokeIsConvertedToFill()) {
fillCase.compare(reporter, stroke2RoundBevelCase,
TestCase::kAllDifferent_ComparisonExpecation);
fillCase.compare(reporter, stroke2RoundBevelDashCase,
TestCase::kAllDifferent_ComparisonExpecation);
} else {
fillCase.compare(reporter, stroke2RoundBevelCase,
TestCase::kSameUpToStroke_ComparisonExpecation);
fillCase.compare(reporter, stroke2RoundBevelDashCase,
TestCase::kSameUpToPE_ComparisonExpecation);
}
if (geo.strokeIsConvertedToFill()) {
stroke2RoundBevelCase.compare(reporter, stroke2RoundBevelDashCase,
TestCase::kAllDifferent_ComparisonExpecation);
} else {
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 = !geo.strokeIsConvertedToFill();
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 = false;
expectations.fStrokeApplies = !geo.strokeIsConvertedToFill();
stroke2RoundBevelAndFillDashCase.testExpectations(reporter, expectations);
TestCase(geo, stroke2RoundBevelAndFillDash, reporter).compare(
reporter, stroke2RoundBevelAndFillDashCase, TestCase::kAllSame_ComparisonExpecation);
stroke2RoundBevelAndFillDashCase.compare(reporter, stroke2RoundBevelAndFillCase,
TestCase::kAllSame_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 (except
// in the line and unclosed rect cases).
if (geo.fillChangesGeom()) {
hairlineCase.compare(reporter, fillCase, TestCase::kAllDifferent_ComparisonExpecation);
} else {
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());
}
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
if (geo.strokeIsConvertedToFill()) {
REPORTER_ASSERT(reporter, !strokeCase1.baseShape().style().applies());
strokeCase1.compare(reporter, strokeCase2, TestCase::kAllSame_ComparisonExpecation);
} else {
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);
SkPaint strokeAndFillDash = strokeDash;
strokeAndFillDash.setStyle(SkPaint::kStrokeAndFill_Style);
// Dash is ignored for stroke and fill
TestCase strokeAndFillDashCase1(geo, strokeAndFillDash, reporter, kS1);
TestCase strokeAndFillDashCase2(geo, strokeAndFillDash, reporter, kS2);
// Scale affects the stroke, but check to make sure this didn't become a simpler shape (e.g.
// stroke-and-filled rect can become a rect), in which case the scale shouldn't matter and the
// geometries should agree.
if (geo.strokeAndFillIsConvertedToFill(strokeAndFillDash)) {
REPORTER_ASSERT(reporter, !strokeAndFillCase1.baseShape().style().applies());
strokeAndFillCase1.compare(reporter, strokeAndFillCase2,
TestCase::kAllSame_ComparisonExpecation);
strokeAndFillDashCase1.compare(reporter, strokeAndFillDashCase2,
TestCase::kAllSame_ComparisonExpecation);
} else {
strokeAndFillCase1.compare(reporter, strokeAndFillCase2,
TestCase::kSameUpToStroke_ComparisonExpecation);
}
strokeAndFillDashCase1.compare(reporter, strokeAndFillCase1,
TestCase::kAllSame_ComparisonExpecation);
strokeAndFillDashCase2.compare(reporter, strokeAndFillCase2,
TestCase::kAllSame_ComparisonExpecation);
}
template <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) {
// If stroking is immediately incorporated into a geometric transformation then the base
// shapes will differ.
if (geo.strokeIsConvertedToFill()) {
strokeACase.compare(reporter, strokeBCase,
TestCase::kAllDifferent_ComparisonExpecation);
} else {
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) {
// If stroking is immediately incorporated into a geometric transformation then the base
// shapes will differ.
if (geo.strokeAndFillIsConvertedToFill(strokeAndFillA) ||
geo.strokeAndFillIsConvertedToFill(strokeAndFillB)) {
strokeAndFillACase.compare(reporter, strokeAndFillBCase,
TestCase::kAllDifferent_ComparisonExpecation);
} else {
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);
}
}
template <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);
};
static void test_stroke_cap(skiatest::Reporter* reporter, const Geo& geo) {
SkPaint hairline;
hairline.setStrokeWidth(0);
hairline.setStyle(SkPaint::kStroke_Style);
GrShape shape = geo.makeShape(hairline);
// 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<SkPaint::Cap>(
reporter,
geo,
[](SkPaint* p, SkPaint::Cap c) { p->setStrokeCap(c);},
SkPaint::kButt_Cap, SkPaint::kRound_Cap,
affectsStroke,
affectsDashAndStroke);
};
static bool shape_known_not_to_have_joins(const GrShape& shape) {
return shape.asLine(nullptr, nullptr) || shape.isEmpty();
}
static void test_stroke_join(skiatest::Reporter* reporter, const Geo& geo) {
SkPaint hairline;
hairline.setStrokeWidth(0);
hairline.setStyle(SkPaint::kStroke_Style);
GrShape shape = geo.makeShape(hairline);
// GrShape recognizes certain types don't have joins and will prevent the join type from
// affecting the style key.
// Dashing doesn't add additional joins. However, GrShape currently loses track of this
// after applying the dash.
bool affectsStroke = !shape_known_not_to_have_joins(shape);
test_stroke_param_impl<SkPaint::Join>(
reporter,
geo,
[](SkPaint* p, SkPaint::Join j) { p->setStrokeJoin(j);},
SkPaint::kRound_Join, SkPaint::kBevel_Join,
affectsStroke, true);
};
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);
};
SkPaint hairline;
hairline.setStrokeWidth(0);
hairline.setStyle(SkPaint::kStroke_Style);
GrShape shape = geo.makeShape(hairline);
bool mayHaveJoins = !shape_known_not_to_have_joins(shape);
// The miter limit should affect stroked and dashed-stroked cases when the join type is
// miter.
test_stroke_param_impl<SkScalar>(
reporter,
geo,
setMiterJoinAndLimit,
0.5f, 0.75f,
mayHaveJoins,
true);
// The miter limit should not affect stroked and dashed-stroked cases when the join type is
// not miter.
test_stroke_param_impl<SkScalar>(
reporter,
geo,
setOtherJoinAndLimit,
0.5f, 0.75f,
false,
false);
}
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);
}
}
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);
// We expect the null dash to be ignored so nullDashCase should match strokeCase, always.
nullDashCase.compare(reporter, strokeCase, TestCase::kAllSame_ComparisonExpecation);
// Check whether the fillCase or strokeCase/nullDashCase would undergo a geometric tranformation
// on construction in order to determine how to compare the fill and stroke.
if (geo.fillChangesGeom() || geo.strokeIsConvertedToFill()) {
nullDashCase.compare(reporter, fillCase, TestCase::kAllDifferent_ComparisonExpecation);
} else {
nullDashCase.compare(reporter, fillCase, TestCase::kSameUpToStroke_ComparisonExpecation);
}
// In the null dash case we may immediately convert to a fill, but not for the normal dash case.
if (geo.strokeIsConvertedToFill()) {
nullDashCase.compare(reporter, dashCase, TestCase::kAllDifferent_ComparisonExpecation);
} else {
nullDashCase.compare(reporter, dashCase, TestCase::kSameUpToPE_ComparisonExpecation);
}
}
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);
// Check whether constructing the filled case would cause the base shape to have a different
// geometry (because of a geometric transformation upon initial GrShape construction).
if (geo.fillChangesGeom()) {
fillGeoCase.compare(reporter, geoPECase, TestCase::kAllDifferent_ComparisonExpecation);
fillGeoCase.compare(reporter, geoPEStrokeCase,
TestCase::kAllDifferent_ComparisonExpecation);
} else {
fillGeoCase.compare(reporter, geoPECase, TestCase::kSameUpToPE_ComparisonExpecation);
fillGeoCase.compare(reporter, geoPEStrokeCase, TestCase::kSameUpToPE_ComparisonExpecation);
}
geoPECase.compare(reporter, geoPEStrokeCase,
TestCase::kSameUpToStroke_ComparisonExpecation);
TestCase rrectFillCase(reporter, RRectPathEffect::RRect(), fill);
SkPaint stroke = peStroke;
stroke.setPathEffect(nullptr);
TestCase rrectStrokeCase(reporter, RRectPathEffect::RRect(), stroke);
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, nullptr, nullptr,
nullptr));
REPORTER_ASSERT(reporter, rrect == RRectPathEffect::RRect());
REPORTER_ASSERT(reporter, geoPECase.appliedPathEffectKey() == rrectFillCase.baseKey());
REPORTER_ASSERT(reporter, geoPECase.appliedFullStyleShape().asRRect(&rrect, nullptr, nullptr,
nullptr));
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, nullptr,
nullptr, nullptr));
REPORTER_ASSERT(reporter, rrect == RRectPathEffect::RRect());
REPORTER_ASSERT(reporter, geoPEStrokeCase.appliedPathEffectKey() == rrectFillCase.baseKey());
REPORTER_ASSERT(reporter, !geoPEStrokeCase.appliedFullStyleShape().asRRect(&rrect, nullptr,
nullptr, nullptr));
REPORTER_ASSERT(reporter, geoPEStrokeCase.appliedFullStyleKey() ==
rrectStrokeCase.appliedFullStyleKey());
}
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;
// To avoid triggering data-based keying of paths with few verbs we add many segments.
for (int i = 0; i < 100; ++i) {
dst->lineTo(SkIntToScalar(i), SkIntToScalar(i));
}
return true;
}
void computeFastBounds(SkRect* dst, const SkRect& src) const override {
*dst = src;
dst->growToInclude(0, 0);
dst->growToInclude(100, 100);
}
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);
}
void test_make_hairline_path_effect(skiatest::Reporter* reporter, const Geo& geo) {
/**
* 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, c;
peCase.baseShape().asPath(&a);
peCase.appliedPathEffectShape().asPath(&b);
peCase.appliedFullStyleShape().asPath(&c);
if (geo.isNonPath(pe)) {
// RRect types can have a change in start index or direction after the PE is applied. This
// is because once the PE is applied, GrShape may canonicalize the dir and index since it
// is not germane to the styling any longer.
// Instead we just check that the paths would fill the same both before and after styling.
REPORTER_ASSERT(reporter, paths_fill_same(a, b));
REPORTER_ASSERT(reporter, paths_fill_same(a, c));
} else {
// The base shape cannot perform canonicalization on the path's fill type because of an
// unknown path effect. However, after the path effect is applied the resulting hairline
// shape will canonicalize the path fill type since hairlines (and stroking in general)
// don't distinguish between even/odd and non-zero winding.
a.setFillType(b.getFillType());
REPORTER_ASSERT(reporter, a == b);
REPORTER_ASSERT(reporter, a == c);
// If the resulting path is small enough then it will have a key.
REPORTER_ASSERT(reporter, paths_fill_same(a, b));
REPORTER_ASSERT(reporter, paths_fill_same(a, c));
REPORTER_ASSERT(reporter, peCase.appliedPathEffectKey().empty());
REPORTER_ASSERT(reporter, peCase.appliedFullStyleKey().empty());
}
REPORTER_ASSERT(reporter, peCase.appliedPathEffectShape().style().isSimpleHairline());
REPORTER_ASSERT(reporter, peCase.appliedFullStyleShape().style().isSimpleHairline());
}
void test_volatile_path(skiatest::Reporter* reporter, const Geo& geo) {
SkPath vPath = geo.path();
vPath.setIsVolatile(true);
SkPaint dashAndStroke;
dashAndStroke.setPathEffect(make_dash());
dashAndStroke.setStrokeWidth(2.f);
dashAndStroke.setStyle(SkPaint::kStroke_Style);
TestCase volatileCase(reporter, vPath, dashAndStroke);
// We expect a shape made from a volatile path to have a key iff the shape is recognized
// as a specialized geometry.
if (geo.isNonPath(dashAndStroke)) {
REPORTER_ASSERT(reporter, SkToBool(volatileCase.baseKey().count()));
// In this case all the keys should be identical to the non-volatile case.
TestCase nonVolatileCase(reporter, geo.path(), dashAndStroke);
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()));
}
}
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_path_effect_fails(skiatest::Reporter* reporter, const Geo& geo) {
/**
* This path effect always fails to apply.
*/
class FailurePathEffect : SkPathEffect {
public:
bool filterPath(SkPath* dst, const SkPath& src, SkStrokeRec*,
const SkRect* cullR) const override {
return false;
}
void computeFastBounds(SkRect* dst, const SkRect& src) const override {
*dst = src;
}
static sk_sp<SkPathEffect> Make() { return sk_sp<SkPathEffect>(new FailurePathEffect); }
Factory getFactory() const override { return nullptr; }
void toString(SkString*) const override {}
private:
FailurePathEffect() {}
};
SkPaint fill;
TestCase fillCase(geo, fill, reporter);
SkPaint pe;
pe.setPathEffect(FailurePathEffect::Make());
TestCase peCase(geo, pe, reporter);
SkPaint stroke;
stroke.setStrokeWidth(2.f);
stroke.setStyle(SkPaint::kStroke_Style);
TestCase strokeCase(geo, stroke, reporter);
SkPaint peStroke = stroke;
peStroke.setPathEffect(FailurePathEffect::Make());
TestCase peStrokeCase(geo, peStroke, reporter);
// In general the path effect failure can cause some of the TestCase::compare() tests to fail
// for at least two reasons: 1) We will initially treat the shape as unkeyable because of the
// path effect, but then when the path effect fails we can key it. 2) GrShape will change its
// mind about whether a unclosed rect is actually rect. The path effect initially bars us from
// closing it but after the effect fails we can (for the fill+pe case). This causes different
// routes through GrShape to have equivalent but different representations of the path (closed
// or not) but that fill the same.
SkPath a;
SkPath b;
fillCase.appliedPathEffectShape().asPath(&a);
peCase.appliedPathEffectShape().asPath(&b);
REPORTER_ASSERT(reporter, paths_fill_same(a, b));
fillCase.appliedFullStyleShape().asPath(&a);
peCase.appliedFullStyleShape().asPath(&b);
REPORTER_ASSERT(reporter, paths_fill_same(a, b));
strokeCase.appliedPathEffectShape().asPath(&a);
peStrokeCase.appliedPathEffectShape().asPath(&b);
REPORTER_ASSERT(reporter, paths_fill_same(a, b));
strokeCase.appliedFullStyleShape().asPath(&a);
peStrokeCase.appliedFullStyleShape().asPath(&b);
REPORTER_ASSERT(reporter, paths_fill_same(a, b));
}
void test_empty_shape(skiatest::Reporter* reporter) {
SkPath emptyPath;
SkPaint fill;
TestCase fillEmptyCase(reporter, emptyPath, fill);
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(reporter, emptyPath2, stroke);
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(reporter, emptyPath3, dashAndStroke);
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(reporter, emptyRRect, dashAndStroke);
dashAndStrokeEmptyRRectCase.compare(reporter, fillEmptyCase,
TestCase::kAllSame_ComparisonExpecation);
// Same for a rect.
SkRect emptyRect = SkRect::MakeEmpty();
TestCase dashAndStrokeEmptyRectCase(reporter, emptyRect, dashAndStroke);
dashAndStrokeEmptyRectCase.compare(reporter, fillEmptyCase,
TestCase::kAllSame_ComparisonExpecation);
}
// rect and oval types have rrect start indices that collapse to the same point. Here we select the
// canonical point in these cases.
unsigned canonicalize_rrect_start(int s, const SkRRect& rrect) {
switch (rrect.getType()) {
case SkRRect::kRect_Type:
return (s + 1) & 0b110;
case SkRRect::kOval_Type:
return s & 0b110;
default:
return s;
}
}
void test_rrect(skiatest::Reporter* r, const SkRRect& rrect) {
enum Style {
kFill,
kStroke,
kHairline,
kStrokeAndFill
};
// SkStrokeRec has no default cons., so init with kFill before calling the setters below.
SkStrokeRec strokeRecs[4] { SkStrokeRec::kFill_InitStyle, SkStrokeRec::kFill_InitStyle,
SkStrokeRec::kFill_InitStyle, SkStrokeRec::kFill_InitStyle};
strokeRecs[kFill].setFillStyle();
strokeRecs[kStroke].setStrokeStyle(2.f);
strokeRecs[kHairline].setHairlineStyle();
strokeRecs[kStrokeAndFill].setStrokeStyle(3.f, true);
// Use a bevel join to avoid complications of stroke+filled rects becoming filled rects before
// applyStyle() is called.
strokeRecs[kStrokeAndFill].setStrokeParams(SkPaint::kButt_Cap, SkPaint::kBevel_Join, 1.f);
sk_sp<SkPathEffect> dashEffect = make_dash();
static constexpr Style kStyleCnt = static_cast<Style>(SK_ARRAY_COUNT(strokeRecs));
auto index = [](bool inverted,
SkPath::Direction dir,
unsigned start,
Style style,
bool dash) -> int {
return inverted * (2 * 8 * kStyleCnt * 2) +
dir * ( 8 * kStyleCnt * 2) +
start * ( kStyleCnt * 2) +
style * ( 2) +
dash;
};
static const SkPath::Direction kSecondDirection = static_cast<SkPath::Direction>(1);
const int cnt = index(true, kSecondDirection, 7, static_cast<Style>(kStyleCnt - 1), true) + 1;
SkAutoTArray<GrShape> shapes(cnt);
for (bool inverted : {false, true}) {
for (SkPath::Direction dir : {SkPath::kCW_Direction, SkPath::kCCW_Direction}) {
for (unsigned start = 0; start < 8; ++start) {
for (Style style : {kFill, kStroke, kHairline, kStrokeAndFill}) {
for (bool dash : {false, true}) {
SkPathEffect* pe = dash ? dashEffect.get() : nullptr;
shapes[index(inverted, dir, start, style, dash)] =
GrShape(rrect, dir, start, SkToBool(inverted),
GrStyle(strokeRecs[style], pe));
}
}
}
}
}
// Get the keys for some example shape instances that we'll use for comparision against the
// rest.
static constexpr SkPath::Direction kExamplesDir = SkPath::kCW_Direction;
static constexpr unsigned kExamplesStart = 0;
const GrShape& exampleFillCase = shapes[index(false, kExamplesDir, kExamplesStart, kFill,
false)];
Key exampleFillCaseKey;
make_key(&exampleFillCaseKey, exampleFillCase);
const GrShape& exampleStrokeAndFillCase = shapes[index(false, kExamplesDir, kExamplesStart,
kStrokeAndFill, false)];
Key exampleStrokeAndFillCaseKey;
make_key(&exampleStrokeAndFillCaseKey, exampleStrokeAndFillCase);
const GrShape& exampleInvFillCase = shapes[index(true, kExamplesDir, kExamplesStart, kFill,
false)];
Key exampleInvFillCaseKey;
make_key(&exampleInvFillCaseKey, exampleInvFillCase);
const GrShape& exampleInvStrokeAndFillCase = shapes[index(true, kExamplesDir, kExamplesStart,
kStrokeAndFill, false)];
Key exampleInvStrokeAndFillCaseKey;
make_key(&exampleInvStrokeAndFillCaseKey, exampleInvStrokeAndFillCase);
const GrShape& exampleStrokeCase = shapes[index(false, kExamplesDir, kExamplesStart, kStroke,
false)];
Key exampleStrokeCaseKey;
make_key(&exampleStrokeCaseKey, exampleStrokeCase);
const GrShape& exampleInvStrokeCase = shapes[index(true, kExamplesDir, kExamplesStart, kStroke,
false)];
Key exampleInvStrokeCaseKey;
make_key(&exampleInvStrokeCaseKey, exampleInvStrokeCase);
const GrShape& exampleHairlineCase = shapes[index(false, kExamplesDir, kExamplesStart,
kHairline, false)];
Key exampleHairlineCaseKey;
make_key(&exampleHairlineCaseKey, exampleHairlineCase);
const GrShape& exampleInvHairlineCase = shapes[index(true, kExamplesDir, kExamplesStart,
kHairline, false)];
Key exampleInvHairlineCaseKey;
make_key(&exampleInvHairlineCaseKey, exampleInvHairlineCase);
// These are dummy initializations to suppress warnings.
SkRRect queryRR = SkRRect::MakeEmpty();
SkPath::Direction queryDir = SkPath::kCW_Direction;
unsigned queryStart = ~0U;
bool queryInverted = true;
REPORTER_ASSERT(r, exampleFillCase.asRRect(&queryRR, &queryDir, &queryStart, &queryInverted));
REPORTER_ASSERT(r, queryRR == rrect);
REPORTER_ASSERT(r, SkPath::kCW_Direction == queryDir);
REPORTER_ASSERT(r, 0 == queryStart);
REPORTER_ASSERT(r, !queryInverted);
REPORTER_ASSERT(r, exampleInvFillCase.asRRect(&queryRR, &queryDir, &queryStart,
&queryInverted));
REPORTER_ASSERT(r, queryRR == rrect);
REPORTER_ASSERT(r, SkPath::kCW_Direction == queryDir);
REPORTER_ASSERT(r, 0 == queryStart);
REPORTER_ASSERT(r, queryInverted);
REPORTER_ASSERT(r, exampleStrokeAndFillCase.asRRect(&queryRR, &queryDir, &queryStart,
&queryInverted));
REPORTER_ASSERT(r, queryRR == rrect);
REPORTER_ASSERT(r, SkPath::kCW_Direction == queryDir);
REPORTER_ASSERT(r, 0 == queryStart);
REPORTER_ASSERT(r, !queryInverted);
REPORTER_ASSERT(r, exampleInvStrokeAndFillCase.asRRect(&queryRR, &queryDir, &queryStart,
&queryInverted));
REPORTER_ASSERT(r, queryRR == rrect);
REPORTER_ASSERT(r, SkPath::kCW_Direction == queryDir);
REPORTER_ASSERT(r, 0 == queryStart);
REPORTER_ASSERT(r, queryInverted);
REPORTER_ASSERT(r, exampleHairlineCase.asRRect(&queryRR, &queryDir, &queryStart,
&queryInverted));
REPORTER_ASSERT(r, queryRR == rrect);
REPORTER_ASSERT(r, SkPath::kCW_Direction == queryDir);
REPORTER_ASSERT(r, 0 == queryStart);
REPORTER_ASSERT(r, !queryInverted);
REPORTER_ASSERT(r, exampleInvHairlineCase.asRRect(&queryRR, &queryDir, &queryStart,
&queryInverted));
REPORTER_ASSERT(r, queryRR == rrect);
REPORTER_ASSERT(r, SkPath::kCW_Direction == queryDir);
REPORTER_ASSERT(r, 0 == queryStart);
REPORTER_ASSERT(r, queryInverted);
REPORTER_ASSERT(r, exampleStrokeCase.asRRect(&queryRR, &queryDir, &queryStart, &queryInverted));
REPORTER_ASSERT(r, queryRR == rrect);
REPORTER_ASSERT(r, SkPath::kCW_Direction == queryDir);
REPORTER_ASSERT(r, 0 == queryStart);
REPORTER_ASSERT(r, !queryInverted);
REPORTER_ASSERT(r, exampleInvStrokeCase.asRRect(&queryRR, &queryDir, &queryStart,
&queryInverted));
REPORTER_ASSERT(r, queryRR == rrect);
REPORTER_ASSERT(r, SkPath::kCW_Direction == queryDir);
REPORTER_ASSERT(r, 0 == queryStart);
REPORTER_ASSERT(r, queryInverted);
// Remember that the key reflects the geometry before styling is applied.
REPORTER_ASSERT(r, exampleFillCaseKey != exampleInvFillCaseKey);
REPORTER_ASSERT(r, exampleFillCaseKey == exampleStrokeAndFillCaseKey);
REPORTER_ASSERT(r, exampleFillCaseKey != exampleInvStrokeAndFillCaseKey);
REPORTER_ASSERT(r, exampleFillCaseKey == exampleStrokeCaseKey);
REPORTER_ASSERT(r, exampleFillCaseKey != exampleInvStrokeCaseKey);
REPORTER_ASSERT(r, exampleFillCaseKey == exampleHairlineCaseKey);
REPORTER_ASSERT(r, exampleFillCaseKey != exampleInvHairlineCaseKey);
REPORTER_ASSERT(r, exampleInvStrokeAndFillCaseKey == exampleInvFillCaseKey);
REPORTER_ASSERT(r, exampleInvStrokeAndFillCaseKey == exampleInvStrokeCaseKey);
REPORTER_ASSERT(r, exampleInvStrokeAndFillCaseKey == exampleInvHairlineCaseKey);
for (bool inverted : {false, true}) {
for (SkPath::Direction dir : {SkPath::kCW_Direction, SkPath::kCCW_Direction}) {
for (unsigned start = 0; start < 8; ++start) {
for (bool dash : {false, true}) {
const GrShape& fillCase = shapes[index(inverted, dir, start, kFill, dash)];
Key fillCaseKey;
make_key(&fillCaseKey, fillCase);
const GrShape& strokeAndFillCase = shapes[index(inverted, dir, start,
kStrokeAndFill, dash)];
Key strokeAndFillCaseKey;
make_key(&strokeAndFillCaseKey, strokeAndFillCase);
// Both fill and stroke-and-fill shapes must respect the inverseness and both
// ignore dashing.
REPORTER_ASSERT(r, !fillCase.style().pathEffect());
REPORTER_ASSERT(r, !strokeAndFillCase.style().pathEffect());
TestCase a(fillCase, r);
TestCase b(inverted ? exampleInvFillCase : exampleFillCase, r);
TestCase c(strokeAndFillCase, r);
TestCase d(inverted ? exampleInvStrokeAndFillCase
: exampleStrokeAndFillCase, r);
a.compare(r, b, TestCase::kAllSame_ComparisonExpecation);
c.compare(r, d, TestCase::kAllSame_ComparisonExpecation);
const GrShape& strokeCase = shapes[index(inverted, dir, start, kStroke, dash)];
const GrShape& hairlineCase = shapes[index(inverted, dir, start, kHairline,
dash)];
TestCase e(strokeCase, r);
TestCase g(hairlineCase, r);
// Both hairline and stroke shapes must respect the dashing.
if (dash) {
// Dashing always ignores the inverseness. skbug.com/5421
TestCase f(exampleStrokeCase, r);
TestCase h(exampleHairlineCase, r);
unsigned expectedStart = canonicalize_rrect_start(start, rrect);
REPORTER_ASSERT(r, strokeCase.style().pathEffect());
REPORTER_ASSERT(r, hairlineCase.style().pathEffect());
REPORTER_ASSERT(r, strokeCase.asRRect(&queryRR, &queryDir, &queryStart,
&queryInverted));
REPORTER_ASSERT(r, queryRR == rrect);
REPORTER_ASSERT(r, queryDir == dir);
REPORTER_ASSERT(r, queryStart == expectedStart);
REPORTER_ASSERT(r, !queryInverted);
REPORTER_ASSERT(r, hairlineCase.asRRect(&queryRR, &queryDir, &queryStart,
&queryInverted));
REPORTER_ASSERT(r, queryRR == rrect);
REPORTER_ASSERT(r, queryDir == dir);
REPORTER_ASSERT(r, queryStart == expectedStart);
REPORTER_ASSERT(r, !queryInverted);
// The pre-style case for the dash will match the non-dash example iff the
// dir and start match (dir=cw, start=0).
if (0 == expectedStart && SkPath::kCW_Direction == dir) {
e.compare(r, f, TestCase::kSameUpToPE_ComparisonExpecation);
g.compare(r, h, TestCase::kSameUpToPE_ComparisonExpecation);
} else {
e.compare(r, f, TestCase::kAllDifferent_ComparisonExpecation);
g.compare(r, h, TestCase::kAllDifferent_ComparisonExpecation);
}
} else {
TestCase f(inverted ? exampleInvStrokeCase : exampleStrokeCase, r);
TestCase h(inverted ? exampleInvHairlineCase : exampleHairlineCase, r);
REPORTER_ASSERT(r, !strokeCase.style().pathEffect());
REPORTER_ASSERT(r, !hairlineCase.style().pathEffect());
e.compare(r, f, TestCase::kAllSame_ComparisonExpecation);
g.compare(r, h, TestCase::kAllSame_ComparisonExpecation);
}
}
}
}
}
}
void test_lines(skiatest::Reporter* r) {
static constexpr SkPoint kA { 1, 1};
static constexpr SkPoint kB { 5, -9};
static constexpr SkPoint kC {-3, 17};
SkPath lineAB;
lineAB.moveTo(kA);
lineAB.lineTo(kB);
SkPath lineBA;
lineBA.moveTo(kB);
lineBA.lineTo(kA);
SkPath lineAC;
lineAC.moveTo(kB);
lineAC.lineTo(kC);
SkPath invLineAB = lineAB;
invLineAB.setFillType(SkPath::kInverseEvenOdd_FillType);
SkPaint fill;
SkPaint stroke;
stroke.setStyle(SkPaint::kStroke_Style);
stroke.setStrokeWidth(2.f);
SkPaint hairline;
hairline.setStyle(SkPaint::kStroke_Style);
hairline.setStrokeWidth(0.f);
SkPaint dash = stroke;
dash.setPathEffect(make_dash());
TestCase fillAB(r, lineAB, fill);
TestCase fillEmpty(r, SkPath(), fill);
fillAB.compare(r, fillEmpty, TestCase::kAllSame_ComparisonExpecation);
REPORTER_ASSERT(r, !fillAB.baseShape().asLine(nullptr, nullptr));
TestCase strokeAB(r, lineAB, stroke);
TestCase strokeBA(r, lineBA, stroke);
TestCase strokeAC(r, lineAC, stroke);
TestCase hairlineAB(r, lineAB, hairline);
TestCase hairlineBA(r, lineBA, hairline);
TestCase hairlineAC(r, lineAC, hairline);
TestCase dashAB(r, lineAB, dash);
TestCase dashBA(r, lineBA, dash);
TestCase dashAC(r, lineAC, dash);
strokeAB.compare(r, fillAB, TestCase::kAllDifferent_ComparisonExpecation);
strokeAB.compare(r, strokeBA, TestCase::kAllSame_ComparisonExpecation);
strokeAB.compare(r, strokeAC, TestCase::kAllDifferent_ComparisonExpecation);
hairlineAB.compare(r, hairlineBA, TestCase::kAllSame_ComparisonExpecation);
hairlineAB.compare(r, hairlineAC, TestCase::kAllDifferent_ComparisonExpecation);
dashAB.compare(r, dashBA, TestCase::kAllDifferent_ComparisonExpecation);
dashAB.compare(r, dashAC, TestCase::kAllDifferent_ComparisonExpecation);
strokeAB.compare(r, hairlineAB, TestCase::kSameUpToStroke_ComparisonExpecation);
// One of dashAB or dashBA should have the same line as strokeAB. It depends upon how
// GrShape canonicalizes line endpoints (when it can, i.e. when not dashed).
bool canonicalizeAsAB;
SkPoint canonicalPts[2] {kA, kB};
// Init these to suppress warnings.
bool inverted = true;
SkPoint pts[2] {{0, 0}, {0, 0}};
REPORTER_ASSERT(r, strokeAB.baseShape().asLine(pts, &inverted) && !inverted);
if (pts[0] == kA && pts[1] == kB) {
canonicalizeAsAB = true;
} else if (pts[1] == kA && pts[0] == kB) {
canonicalizeAsAB = false;
SkTSwap(canonicalPts[0], canonicalPts[1]);
} else {
ERRORF(r, "Should return pts (a,b) or (b, a)");
return;
};
strokeAB.compare(r, canonicalizeAsAB ? dashAB : dashBA,
TestCase::kSameUpToPE_ComparisonExpecation);
REPORTER_ASSERT(r, strokeAB.baseShape().asLine(pts, &inverted) && !inverted &&
pts[0] == canonicalPts[0] && pts[1] == canonicalPts[1]);
REPORTER_ASSERT(r, hairlineAB.baseShape().asLine(pts, &inverted) && !inverted &&
pts[0] == canonicalPts[0] && pts[1] == canonicalPts[1]);
REPORTER_ASSERT(r, dashAB.baseShape().asLine(pts, &inverted) && !inverted &&
pts[0] == kA && pts[1] == kB);
REPORTER_ASSERT(r, dashBA.baseShape().asLine(pts, &inverted) && !inverted &&
pts[0] == kB && pts[1] == kA);
TestCase strokeInvAB(r, invLineAB, stroke);
TestCase hairlineInvAB(r, invLineAB, hairline);
TestCase dashInvAB(r, invLineAB, dash);
strokeInvAB.compare(r, strokeAB, TestCase::kAllDifferent_ComparisonExpecation);
hairlineInvAB.compare(r, hairlineAB, TestCase::kAllDifferent_ComparisonExpecation);
// Dashing ignores inverse.
dashInvAB.compare(r, dashAB, TestCase::kAllSame_ComparisonExpecation);
REPORTER_ASSERT(r, strokeInvAB.baseShape().asLine(pts, &inverted) && inverted &&
pts[0] == canonicalPts[0] && pts[1] == canonicalPts[1]);
REPORTER_ASSERT(r, hairlineInvAB.baseShape().asLine(pts, &inverted) && inverted &&
pts[0] == canonicalPts[0] && pts[1] == canonicalPts[1]);
// Dashing ignores inverse.
REPORTER_ASSERT(r, dashInvAB.baseShape().asLine(pts, &inverted) && !inverted &&
pts[0] == kA && pts[1] == kB);
}
static void test_stroked_lines(skiatest::Reporter* r) {
// Paints to try
SkPaint buttCap;
buttCap.setStyle(SkPaint::kStroke_Style);
buttCap.setStrokeWidth(4);
buttCap.setStrokeCap(SkPaint::kButt_Cap);
SkPaint squareCap = buttCap;
squareCap.setStrokeCap(SkPaint::kSquare_Cap);
SkPaint roundCap = buttCap;
roundCap.setStrokeCap(SkPaint::kRound_Cap);
// vertical
SkPath linePath;
linePath.moveTo(4, 4);
linePath.lineTo(4, 5);
SkPaint fill;
TestCase(r, linePath, buttCap).compare(r, TestCase(r, SkRect::MakeLTRB(2, 4, 6, 5), fill),
TestCase::kAllSame_ComparisonExpecation);
TestCase(r, linePath, squareCap).compare(r, TestCase(r, SkRect::MakeLTRB(2, 2, 6, 7), fill),
TestCase::kAllSame_ComparisonExpecation);
TestCase(r, linePath, roundCap).compare(r,
TestCase(r, SkRRect::MakeRectXY(SkRect::MakeLTRB(2, 2, 6, 7), 2, 2), fill),
TestCase::kAllSame_ComparisonExpecation);
// horizontal
linePath.reset();
linePath.moveTo(4, 4);
linePath.lineTo(5, 4);
TestCase(r, linePath, buttCap).compare(r, TestCase(r, SkRect::MakeLTRB(4, 2, 5, 6), fill),
TestCase::kAllSame_ComparisonExpecation);
TestCase(r, linePath, squareCap).compare(r, TestCase(r, SkRect::MakeLTRB(2, 2, 7, 6), fill),
TestCase::kAllSame_ComparisonExpecation);
TestCase(r, linePath, roundCap).compare(r,
TestCase(r, SkRRect::MakeRectXY(SkRect::MakeLTRB(2, 2, 7, 6), 2, 2), fill),
TestCase::kAllSame_ComparisonExpecation);
// point
linePath.reset();
linePath.moveTo(4, 4);
linePath.lineTo(4, 4);
TestCase(r, linePath, buttCap).compare(r, TestCase(r, SkRect::MakeEmpty(), fill),
TestCase::kAllSame_ComparisonExpecation);
TestCase(r, linePath, squareCap).compare(r, TestCase(r, SkRect::MakeLTRB(2, 2, 6, 6), fill),
TestCase::kAllSame_ComparisonExpecation);
TestCase(r, linePath, roundCap).compare(r,
TestCase(r, SkRRect::MakeRectXY(SkRect::MakeLTRB(2, 2, 6, 6), 2, 2), fill),
TestCase::kAllSame_ComparisonExpecation);
}
static void test_short_path_keys(skiatest::Reporter* r) {
SkPaint paints[4];
paints[1].setStyle(SkPaint::kStroke_Style);
paints[1].setStrokeWidth(5.f);
paints[2].setStyle(SkPaint::kStroke_Style);
paints[2].setStrokeWidth(0.f);
paints[3].setStyle(SkPaint::kStrokeAndFill_Style);
paints[3].setStrokeWidth(5.f);
auto compare = [r, &paints] (const SkPath& pathA, const SkPath& pathB,
TestCase::ComparisonExpecation expectation) {
SkPath volatileA = pathA;
SkPath volatileB = pathB;
volatileA.setIsVolatile(true);
volatileB.setIsVolatile(true);
for (const SkPaint& paint : paints) {
REPORTER_ASSERT(r, !GrShape(volatileA, paint).hasUnstyledKey());
REPORTER_ASSERT(r, !GrShape(volatileB, paint).hasUnstyledKey());
for (PathGeo::Invert invert : {PathGeo::Invert::kNo, PathGeo::Invert::kYes}) {
TestCase caseA(PathGeo(pathA, invert), paint, r);
TestCase caseB(PathGeo(pathB, invert), paint, r);
caseA.compare(r, caseB, expectation);
}
}
};
SkPath pathA;
SkPath pathB;
// Two identical paths
pathA.lineTo(10.f, 10.f);
pathA.conicTo(20.f, 20.f, 20.f, 30.f, 0.7f);
pathB.lineTo(10.f, 10.f);
pathB.conicTo(20.f, 20.f, 20.f, 30.f, 0.7f);
compare(pathA, pathB, TestCase::kAllSame_ComparisonExpecation);
// Give path b a different point
pathB.reset();
pathB.lineTo(10.f, 10.f);
pathB.conicTo(21.f, 20.f, 20.f, 30.f, 0.7f);
compare(pathA, pathB, TestCase::kAllDifferent_ComparisonExpecation);
// Give path b a different conic weight
pathB.reset();
pathB.lineTo(10.f, 10.f);
pathB.conicTo(20.f, 20.f, 20.f, 30.f, 0.6f);
compare(pathA, pathB, TestCase::kAllDifferent_ComparisonExpecation);
// Give path b an extra lineTo verb
pathB.reset();
pathB.lineTo(10.f, 10.f);
pathB.conicTo(20.f, 20.f, 20.f, 30.f, 0.6f);
pathB.lineTo(50.f, 50.f);
compare(pathA, pathB, TestCase::kAllDifferent_ComparisonExpecation);
// Give path b a close
pathB.reset();
pathB.lineTo(10.f, 10.f);
pathB.conicTo(20.f, 20.f, 20.f, 30.f, 0.7f);
pathB.close();
compare(pathA, pathB, TestCase::kAllDifferent_ComparisonExpecation);
}
DEF_TEST(GrShape, reporter) {
SkTArray<std::unique_ptr<Geo>> geos;
SkTArray<std::unique_ptr<RRectPathGeo>> rrectPathGeos;
for (auto r : { SkRect::MakeWH(10, 20),
SkRect::MakeWH(-10, -20),
SkRect::MakeWH(-10, 20),
SkRect::MakeWH(10, -20)}) {
geos.emplace_back(new RectGeo(r));
SkPath rectPath;
rectPath.addRect(r);
geos.emplace_back(new RRectPathGeo(rectPath, r, RRectPathGeo::RRectForStroke::kYes,
PathGeo::Invert::kNo));
geos.emplace_back(new RRectPathGeo(rectPath, r, RRectPathGeo::RRectForStroke::kYes,
PathGeo::Invert::kYes));
rrectPathGeos.emplace_back(new RRectPathGeo(rectPath, r, RRectPathGeo::RRectForStroke::kYes,
PathGeo::Invert::kNo));
}
for (auto rr : { SkRRect::MakeRect(SkRect::MakeWH(10, 10)),
SkRRect::MakeRectXY(SkRect::MakeWH(10, 10), 3, 4),
SkRRect::MakeOval(SkRect::MakeWH(20, 20))}) {
geos.emplace_back(new RRectGeo(rr));
test_rrect(reporter, rr);
SkPath rectPath;
rectPath.addRRect(rr);
geos.emplace_back(new RRectPathGeo(rectPath, rr, RRectPathGeo::RRectForStroke::kYes,
PathGeo::Invert::kNo));
geos.emplace_back(new RRectPathGeo(rectPath, rr, RRectPathGeo::RRectForStroke::kYes,
PathGeo::Invert::kYes));
rrectPathGeos.emplace_back(new RRectPathGeo(rectPath, rr,
RRectPathGeo::RRectForStroke::kYes,
PathGeo::Invert::kNo));
}
SkPath openRectPath;
openRectPath.moveTo(0, 0);
openRectPath.lineTo(10, 0);
openRectPath.lineTo(10, 10);
openRectPath.lineTo(0, 10);
geos.emplace_back(new RRectPathGeo(openRectPath, SkRect::MakeWH(10, 10),
RRectPathGeo::RRectForStroke::kNo, PathGeo::Invert::kNo));
geos.emplace_back(new RRectPathGeo(openRectPath, SkRect::MakeWH(10, 10),
RRectPathGeo::RRectForStroke::kNo, PathGeo::Invert::kYes));
rrectPathGeos.emplace_back(new RRectPathGeo(openRectPath, SkRect::MakeWH(10, 10),
RRectPathGeo::RRectForStroke::kNo,
PathGeo::Invert::kNo));
SkPath quadPath;
quadPath.quadTo(10, 10, 5, 8);
geos.emplace_back(new PathGeo(quadPath, PathGeo::Invert::kNo));
geos.emplace_back(new PathGeo(quadPath, PathGeo::Invert::kYes));
SkPath linePath;
linePath.lineTo(10, 10);
geos.emplace_back(new PathGeo(linePath, PathGeo::Invert::kNo));
geos.emplace_back(new PathGeo(linePath, PathGeo::Invert::kYes));
// Horizontal and vertical paths become rrects when stroked.
SkPath vLinePath;
vLinePath.lineTo(0, 10);
geos.emplace_back(new PathGeo(vLinePath, PathGeo::Invert::kNo));
geos.emplace_back(new PathGeo(vLinePath, PathGeo::Invert::kYes));
SkPath hLinePath;
hLinePath.lineTo(10, 0);
geos.emplace_back(new PathGeo(hLinePath, PathGeo::Invert::kNo));
geos.emplace_back(new PathGeo(hLinePath, PathGeo::Invert::kYes));
for (int i = 0; i < geos.count(); ++i) {
test_basic(reporter, *geos[i]);
test_scale(reporter, *geos[i]);
test_dash_fill(reporter, *geos[i]);
test_null_dash(reporter, *geos[i]);
// Test modifying various stroke params.
test_stroke_param<SkScalar>(
reporter, *geos[i],
[](SkPaint* p, SkScalar w) { p->setStrokeWidth(w);},
SkIntToScalar(2), SkIntToScalar(4));
test_stroke_join(reporter, *geos[i]);
test_stroke_cap(reporter, *geos[i]);
test_miter_limit(reporter, *geos[i]);
test_path_effect_makes_rrect(reporter, *geos[i]);
test_unknown_path_effect(reporter, *geos[i]);
test_path_effect_makes_empty_shape(reporter, *geos[i]);
test_path_effect_fails(reporter, *geos[i]);
test_make_hairline_path_effect(reporter, *geos[i]);
test_volatile_path(reporter, *geos[i]);
}
for (int i = 0; i < rrectPathGeos.count(); ++i) {
const RRectPathGeo& rrgeo = *rrectPathGeos[i];
SkPaint fillPaint;
TestCase fillPathCase(reporter, rrgeo.path(), fillPaint);
SkRRect rrect;
REPORTER_ASSERT(reporter, rrgeo.isNonPath(fillPaint) ==
fillPathCase.baseShape().asRRect(&rrect, nullptr, nullptr,
nullptr));
if (rrgeo.isNonPath(fillPaint)) {
TestCase fillPathCase2(reporter, rrgeo.path(), fillPaint);
REPORTER_ASSERT(reporter, rrect == rrgeo.rrect());
TestCase fillRRectCase(reporter, rrect, fillPaint);
fillPathCase2.compare(reporter, fillRRectCase,
TestCase::kAllSame_ComparisonExpecation);
}
SkPaint strokePaint;
strokePaint.setStrokeWidth(3.f);
strokePaint.setStyle(SkPaint::kStroke_Style);
TestCase strokePathCase(reporter, rrgeo.path(), strokePaint);
if (rrgeo.isNonPath(strokePaint)) {
REPORTER_ASSERT(reporter, strokePathCase.baseShape().asRRect(&rrect, nullptr, nullptr,
nullptr));
REPORTER_ASSERT(reporter, rrect == rrgeo.rrect());
TestCase strokeRRectCase(reporter, rrect, strokePaint);
strokePathCase.compare(reporter, strokeRRectCase,
TestCase::kAllSame_ComparisonExpecation);
}
}
// Test a volatile empty path.
test_volatile_path(reporter, PathGeo(SkPath(), PathGeo::Invert::kNo));
test_empty_shape(reporter);
test_lines(reporter);
test_stroked_lines(reporter);
test_short_path_keys(reporter);
}
#endif