skia2/tests/PathTest.cpp

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#include "Test.h"
#include "SkPath.h"
#include "SkParse.h"
#include "SkSize.h"
static void check_convexity(skiatest::Reporter* reporter, const SkPath& path,
SkPath::Convexity expected) {
SkPath::Convexity c = SkPath::ComputeConvexity(path);
REPORTER_ASSERT(reporter, c == expected);
}
static void test_convexity2(skiatest::Reporter* reporter) {
SkPath pt;
pt.moveTo(0, 0);
pt.close();
check_convexity(reporter, pt, SkPath::kConvex_Convexity);
SkPath line;
line.moveTo(12, 20);
line.lineTo(-12, -20);
line.close();
check_convexity(reporter, pt, SkPath::kConvex_Convexity);
SkPath triLeft;
triLeft.moveTo(0, 0);
triLeft.lineTo(1, 0);
triLeft.lineTo(1, 1);
triLeft.close();
check_convexity(reporter, triLeft, SkPath::kConvex_Convexity);
SkPath triRight;
triRight.moveTo(0, 0);
triRight.lineTo(-1, 0);
triRight.lineTo(1, 1);
triRight.close();
check_convexity(reporter, triRight, SkPath::kConvex_Convexity);
SkPath square;
square.moveTo(0, 0);
square.lineTo(1, 0);
square.lineTo(1, 1);
square.lineTo(0, 1);
square.close();
check_convexity(reporter, square, SkPath::kConvex_Convexity);
SkPath redundantSquare;
redundantSquare.moveTo(0, 0);
redundantSquare.lineTo(0, 0);
redundantSquare.lineTo(0, 0);
redundantSquare.lineTo(1, 0);
redundantSquare.lineTo(1, 0);
redundantSquare.lineTo(1, 0);
redundantSquare.lineTo(1, 1);
redundantSquare.lineTo(1, 1);
redundantSquare.lineTo(1, 1);
redundantSquare.lineTo(0, 1);
redundantSquare.lineTo(0, 1);
redundantSquare.lineTo(0, 1);
redundantSquare.close();
check_convexity(reporter, redundantSquare, SkPath::kConvex_Convexity);
SkPath bowTie;
bowTie.moveTo(0, 0);
bowTie.lineTo(0, 0);
bowTie.lineTo(0, 0);
bowTie.lineTo(1, 1);
bowTie.lineTo(1, 1);
bowTie.lineTo(1, 1);
bowTie.lineTo(1, 0);
bowTie.lineTo(1, 0);
bowTie.lineTo(1, 0);
bowTie.lineTo(0, 1);
bowTie.lineTo(0, 1);
bowTie.lineTo(0, 1);
bowTie.close();
check_convexity(reporter, bowTie, SkPath::kConcave_Convexity);
SkPath spiral;
spiral.moveTo(0, 0);
spiral.lineTo(100, 0);
spiral.lineTo(100, 100);
spiral.lineTo(0, 100);
spiral.lineTo(0, 50);
spiral.lineTo(50, 50);
spiral.lineTo(50, 75);
spiral.close();
check_convexity(reporter, spiral, SkPath::kConcave_Convexity);
// TODO(reed): We evaluate this path as concave for SK_SCALAR_IS_FLOAT,
// but convex for SK_SCALAR_IS_FIXED.
SkPath dent;
dent.moveTo(0, 0);
dent.lineTo(100, 100);
dent.lineTo(0, 100);
dent.lineTo(-50, 200);
dent.lineTo(-200, 100);
dent.close();
check_convexity(reporter, dent, SkPath::kConcave_Convexity);
}
static void check_convex_bounds(skiatest::Reporter* reporter, const SkPath& p,
const SkRect& bounds) {
REPORTER_ASSERT(reporter, p.isConvex());
REPORTER_ASSERT(reporter, p.getBounds() == bounds);
SkPath p2(p);
REPORTER_ASSERT(reporter, p2.isConvex());
REPORTER_ASSERT(reporter, p2.getBounds() == bounds);
SkPath other;
other.swap(p2);
REPORTER_ASSERT(reporter, other.isConvex());
REPORTER_ASSERT(reporter, other.getBounds() == bounds);
}
static void setFromString(SkPath* path, const char str[]) {
bool first = true;
while (str) {
SkScalar x, y;
str = SkParse::FindScalar(str, &x);
if (NULL == str) {
break;
}
str = SkParse::FindScalar(str, &y);
SkASSERT(str);
if (first) {
path->moveTo(x, y);
first = false;
} else {
path->lineTo(x, y);
}
}
}
static void test_convexity(skiatest::Reporter* reporter) {
static const SkPath::Convexity C = SkPath::kConcave_Convexity;
static const SkPath::Convexity V = SkPath::kConvex_Convexity;
SkPath path;
REPORTER_ASSERT(reporter, V == SkPath::ComputeConvexity(path));
path.addCircle(0, 0, 10);
REPORTER_ASSERT(reporter, V == SkPath::ComputeConvexity(path));
path.addCircle(0, 0, 10); // 2nd circle
REPORTER_ASSERT(reporter, C == SkPath::ComputeConvexity(path));
path.reset();
path.addRect(0, 0, 10, 10, SkPath::kCCW_Direction);
REPORTER_ASSERT(reporter, V == SkPath::ComputeConvexity(path));
path.reset();
path.addRect(0, 0, 10, 10, SkPath::kCW_Direction);
REPORTER_ASSERT(reporter, V == SkPath::ComputeConvexity(path));
static const struct {
const char* fPathStr;
SkPath::Convexity fExpectedConvexity;
} gRec[] = {
{ "", SkPath::kConvex_Convexity },
{ "0 0", SkPath::kConvex_Convexity },
{ "0 0 10 10", SkPath::kConvex_Convexity },
{ "0 0 10 10 20 20 0 0 10 10", SkPath::kConcave_Convexity },
{ "0 0 10 10 10 20", SkPath::kConvex_Convexity },
{ "0 0 10 10 10 0", SkPath::kConvex_Convexity },
{ "0 0 10 10 10 0 0 10", SkPath::kConcave_Convexity },
{ "0 0 10 0 0 10 -10 -10", SkPath::kConcave_Convexity },
};
for (size_t i = 0; i < SK_ARRAY_COUNT(gRec); ++i) {
SkPath path;
setFromString(&path, gRec[i].fPathStr);
SkPath::Convexity c = SkPath::ComputeConvexity(path);
REPORTER_ASSERT(reporter, c == gRec[i].fExpectedConvexity);
}
}
void TestPath(skiatest::Reporter* reporter);
void TestPath(skiatest::Reporter* reporter) {
{
SkSize size;
size.fWidth = 3.4f;
size.width();
size = SkSize::Make(3,4);
SkISize isize = SkISize::Make(3,4);
}
SkTSize<SkScalar>::Make(3,4);
SkPath p, p2;
SkRect bounds, bounds2;
REPORTER_ASSERT(reporter, p.isEmpty());
REPORTER_ASSERT(reporter, p.isConvex());
REPORTER_ASSERT(reporter, p.getFillType() == SkPath::kWinding_FillType);
REPORTER_ASSERT(reporter, !p.isInverseFillType());
REPORTER_ASSERT(reporter, p == p2);
REPORTER_ASSERT(reporter, !(p != p2));
REPORTER_ASSERT(reporter, p.getBounds().isEmpty());
bounds.set(0, 0, SK_Scalar1, SK_Scalar1);
p.addRoundRect(bounds, SK_Scalar1, SK_Scalar1);
check_convex_bounds(reporter, p, bounds);
p.reset();
p.addOval(bounds);
check_convex_bounds(reporter, p, bounds);
p.reset();
p.addRect(bounds);
check_convex_bounds(reporter, p, bounds);
REPORTER_ASSERT(reporter, p != p2);
REPORTER_ASSERT(reporter, !(p == p2));
// does getPoints return the right result
REPORTER_ASSERT(reporter, p.getPoints(NULL, 5) == 4);
SkPoint pts[4];
int count = p.getPoints(pts, 4);
REPORTER_ASSERT(reporter, count == 4);
bounds2.set(pts, 4);
REPORTER_ASSERT(reporter, bounds == bounds2);
bounds.offset(SK_Scalar1*3, SK_Scalar1*4);
p.offset(SK_Scalar1*3, SK_Scalar1*4);
REPORTER_ASSERT(reporter, bounds == p.getBounds());
#if 0 // isRect needs to be implemented
REPORTER_ASSERT(reporter, p.isRect(NULL));
bounds.setEmpty();
REPORTER_ASSERT(reporter, p.isRect(&bounds2));
REPORTER_ASSERT(reporter, bounds == bounds2);
// now force p to not be a rect
bounds.set(0, 0, SK_Scalar1/2, SK_Scalar1/2);
p.addRect(bounds);
REPORTER_ASSERT(reporter, !p.isRect(NULL));
#endif
SkPoint pt;
p.moveTo(SK_Scalar1, 0);
p.getLastPt(&pt);
REPORTER_ASSERT(reporter, pt.fX == SK_Scalar1);
test_convexity(reporter);
test_convexity2(reporter);
}
#include "TestClassDef.h"
DEFINE_TESTCLASS("Path", PathTestClass, TestPath)