virtual void getWarpParams(WarpFrameT& warpFrame, SkMatrix& warpMatrix) const
{
SkPath bSkeleton, tSkeleton;
SkRect r;
r.set(SkIntToScalar(0), SkIntToScalar(0),
SkIntToScalar(600), SkIntToScalar(340));
//bottom
{
SkRect rb(r);
rb.inset(SkIntToScalar(-240), SkIntToScalar(-140));
SkPath tmp;
tmp.addArc(rb, SkIntToScalar(0), SkIntToScalar(180));
bSkeleton.reverseAddPath(tmp);
warpFrame.push_back(bSkeleton);
}
//top
{
SkPath tmp;
tmp.addArc(r, SkIntToScalar(0), SkIntToScalar(180));
tSkeleton.reverseAddPath(tmp);
warpFrame.push_back(tSkeleton);
}
}
void GraphicsContext::strokeArc(const IntRect& r, int startAngle, int angleSpan)
{
if (paintingDisabled())
return;
SkPaint paint;
SkRect oval = r;
if (strokeStyle() == NoStroke) {
// Stroke using the fill color.
// TODO(brettw) is this really correct? It seems unreasonable.
platformContext()->setupPaintForFilling(&paint);
paint.setStyle(SkPaint::kStroke_Style);
paint.setStrokeWidth(WebCoreFloatToSkScalar(strokeThickness()));
} else
platformContext()->setupPaintForStroking(&paint, 0, 0);
// We do this before converting to scalar, so we don't overflow SkFixed.
startAngle = fastMod(startAngle, 360);
angleSpan = fastMod(angleSpan, 360);
SkPath path;
path.addArc(oval, SkIntToScalar(-startAngle), SkIntToScalar(-angleSpan));
if (!isPathSkiaSafe(getCTM(), path))
return;
platformContext()->canvas()->drawPath(path, paint);
}
void onDraw(SkCanvas* canvas) override {
canvas->translate(20, 20);
SkRect r = SkRect::MakeWH(1000, 1000);
SkPaint paint;
paint.setAntiAlias(true);
paint.setStyle(SkPaint::kStroke_Style);
paint.setStrokeWidth(15);
const SkScalar inset = paint.getStrokeWidth() + 4;
const SkScalar sweepAngle = 345;
SkRandom rand;
SkScalar sign = 1;
while (r.width() > paint.getStrokeWidth() * 3) {
paint.setColor(sk_tool_utils::color_to_565(rand.nextU() | (0xFF << 24)));
SkScalar startAngle = rand.nextUScalar1() * 360;
SkScalar speed = SkScalarSqrt(16 / r.width()) * 0.5f;
startAngle += fRotate * 360 * speed * sign;
SkPath path;
path.addArc(r, startAngle, sweepAngle);
canvas->drawPath(path, paint);
r.inset(inset, inset);
sign = -sign;
}
}
static void textStrokePath(SkCanvas* canvas) {
SkPaint paint;
SkPath path;
SkRect rect;
canvas->save();
canvas->scale(SkIntToScalar(250),SkIntToScalar(250));
rect.set(0.0f, 0.21f,
0.78f, 0.99f);
path.addArc(rect, SkIntToScalar(280), SkIntToScalar(350));
paint.setAntiAlias(true);
paint.setStyle(SkPaint::kStroke_Style);
paint.setColor(0xFFFF0000);
paint.setTextSize(0.085f);
paint.setStrokeWidth(.005f);
canvas->drawPath(path, paint);
paint.setLooper(SkBlurDrawLooper::Create(SK_ColorBLACK,
SkBlurMask::ConvertRadiusToSigma(0.002f),
0.0f,
0.0f))->unref();
const char* text = "DRAWING STROKED TEXT WITH A BLUR ON A PATH";
size_t len = strlen(text);
canvas->drawTextOnPathHV(text, len, path, 0,
-0.025f, paint);
canvas->restore();
}
void ACanvasSkia::DrawEllipse(ARect r)
{
_clip();
_SetPaint_Draw();
SkPath path;
path.addArc(ToSkRect(r),0,360);
m_pCanvas->drawPath(path,m_Paint);
Reset();
}
void onOnceBeforeDraw() override {
{
SkPath* lineAnglesPath = &fPaths.push_back();
enum {
kNumAngles = 15,
kRadius = 40,
};
for (int i = 0; i < kNumAngles; ++i) {
SkScalar angle = SK_ScalarPI * SkIntToScalar(i) / kNumAngles;
SkScalar x = kRadius * SkScalarCos(angle);
SkScalar y = kRadius * SkScalarSin(angle);
lineAnglesPath->moveTo(x, y);
lineAnglesPath->lineTo(-x, -y);
}
}
{
SkPath* kindaTightQuad = &fPaths.push_back();
kindaTightQuad->moveTo(0, -10 * SK_Scalar1);
kindaTightQuad->quadTo(SkIntToScalar(100), SkIntToScalar(100), -10 * SK_Scalar1, 0);
}
{
SkPath* tightQuad = &fPaths.push_back();
tightQuad->moveTo(0, -5 * SK_Scalar1);
tightQuad->quadTo(SkIntToScalar(100), SkIntToScalar(100), -5 * SK_Scalar1, 0);
}
{
SkPath* tighterQuad = &fPaths.push_back();
tighterQuad->moveTo(0, -2 * SK_Scalar1);
tighterQuad->quadTo(SkIntToScalar(100), SkIntToScalar(100), -2 * SK_Scalar1, 0);
}
{
SkPath* unevenTighterQuad = &fPaths.push_back();
unevenTighterQuad->moveTo(0, -1 * SK_Scalar1);
SkPoint p;
p.set(-2 * SK_Scalar1 + 3 * SkIntToScalar(102) / 4, SkIntToScalar(75));
unevenTighterQuad->quadTo(SkIntToScalar(100), SkIntToScalar(100), p.fX, p.fY);
}
{
SkPath* reallyTightQuad = &fPaths.push_back();
reallyTightQuad->moveTo(0, -1 * SK_Scalar1);
reallyTightQuad->quadTo(SkIntToScalar(100), SkIntToScalar(100), -1 * SK_Scalar1, 0);
}
{
SkPath* closedQuad = &fPaths.push_back();
closedQuad->moveTo(0, -0);
closedQuad->quadTo(SkIntToScalar(100), SkIntToScalar(100), 0, 0);
}
{
SkPath* unevenClosedQuad = &fPaths.push_back();
unevenClosedQuad->moveTo(0, -0);
unevenClosedQuad->quadTo(SkIntToScalar(100), SkIntToScalar(100),
SkIntToScalar(75), SkIntToScalar(75));
}
// Two problem cases for gpu hairline renderer found by shapeops testing. These used
// to assert that the computed bounding box didn't contain all the vertices.
{
SkPath* problem1 = &fPaths.push_back();
problem1->moveTo(SkIntToScalar(4), SkIntToScalar(6));
problem1->cubicTo(SkIntToScalar(5), SkIntToScalar(6),
SkIntToScalar(5), SkIntToScalar(4),
SkIntToScalar(4), SkIntToScalar(0));
problem1->close();
}
{
SkPath* problem2 = &fPaths.push_back();
problem2->moveTo(SkIntToScalar(5), SkIntToScalar(1));
problem2->lineTo(4.32787323f, 1.67212653f);
problem2->cubicTo(2.75223875f, 3.24776125f,
3.00581908f, 4.51236057f,
3.7580452f, 4.37367964f);
problem2->cubicTo(4.66472578f, 3.888381f,
5.f, 2.875f,
5.f, 1.f);
problem2->close();
}
// Three paths that show the same bug (missing end caps)
{
// A caret (crbug.com/131770)
SkPath* bug0 = &fPaths.push_back();
bug0->moveTo(6.5f,5.5f);
bug0->lineTo(3.5f,0.5f);
bug0->moveTo(0.5f,5.5f);
bug0->lineTo(3.5f,0.5f);
}
{
// An X (crbug.com/137317)
SkPath* bug1 = &fPaths.push_back();
bug1->moveTo(1, 1);
bug1->lineTo(6, 6);
bug1->moveTo(1, 6);
bug1->lineTo(6, 1);
}
{
// A right angle (crbug.com/137465 and crbug.com/256776)
SkPath* bug2 = &fPaths.push_back();
bug2->moveTo(5.5f, 5.5f);
bug2->lineTo(5.5f, 0.5f);
bug2->lineTo(0.5f, 0.5f);
}
{
// Arc example to test imperfect truncation bug (crbug.com/295626)
static const SkScalar kRad = SkIntToScalar(2000);
static const SkScalar kStartAngle = 262.59717f;
static const SkScalar kSweepAngle = SkScalarHalf(17.188717f);
SkPath* bug = &fPaths.push_back();
// Add a circular arc
SkRect circle = SkRect::MakeLTRB(-kRad, -kRad, kRad, kRad);
bug->addArc(circle, kStartAngle, kSweepAngle);
// Now add the chord that should cap the circular arc
SkScalar cosV, sinV = SkScalarSinCos(SkDegreesToRadians(kStartAngle), &cosV);
SkPoint p0 = SkPoint::Make(kRad * cosV, kRad * sinV);
sinV = SkScalarSinCos(SkDegreesToRadians(kStartAngle + kSweepAngle), &cosV);
SkPoint p1 = SkPoint::Make(kRad * cosV, kRad * sinV);
bug->moveTo(p0);
bug->lineTo(p1);
}
}
SkPath makePath() {
SkPath path;
for (uint32_t cIndex = 0; cIndex < fPathContourCount; ++cIndex) {
uint32_t segments = makeSegmentCount();
for (uint32_t sIndex = 0; sIndex < segments; ++sIndex) {
RandomAddPath addPathType = makeAddPathType();
++fAddCount;
if (fPrintName) {
SkDebugf("%.*s%s\n", fPathDepth * 3, fTab,
gRandomAddPathNames[addPathType]);
}
switch (addPathType) {
case kAddArc: {
SkRect oval = makeRect();
SkScalar startAngle = makeAngle();
SkScalar sweepAngle = makeAngle();
path.addArc(oval, startAngle, sweepAngle);
validate(path);
} break;
case kAddRoundRect1: {
SkRect rect = makeRect();
SkScalar rx = makeScalar(), ry = makeScalar();
SkPath::Direction dir = makeDirection();
path.addRoundRect(rect, rx, ry, dir);
validate(path);
} break;
case kAddRoundRect2: {
SkRect rect = makeRect();
SkScalar radii[8];
makeScalarArray(SK_ARRAY_COUNT(radii), radii);
SkPath::Direction dir = makeDirection();
path.addRoundRect(rect, radii, dir);
validate(path);
} break;
case kAddRRect: {
SkRRect rrect = makeRRect();
SkPath::Direction dir = makeDirection();
path.addRRect(rrect, dir);
validate(path);
} break;
case kAddPoly: {
SkTDArray<SkPoint> points;
makePointArray(&points);
bool close = makeBool();
path.addPoly(&points[0], points.count(), close);
validate(path);
} break;
case kAddPath1:
if (fPathDepth < fPathDepthLimit) {
++fPathDepth;
SkPath src = makePath();
validate(src);
SkScalar dx = makeScalar();
SkScalar dy = makeScalar();
SkPath::AddPathMode mode = makeAddPathMode();
path.addPath(src, dx, dy, mode);
--fPathDepth;
validate(path);
}
break;
case kAddPath2:
if (fPathDepth < fPathDepthLimit) {
++fPathDepth;
SkPath src = makePath();
validate(src);
SkPath::AddPathMode mode = makeAddPathMode();
path.addPath(src, mode);
--fPathDepth;
validate(path);
}
break;
case kAddPath3:
if (fPathDepth < fPathDepthLimit) {
++fPathDepth;
SkPath src = makePath();
validate(src);
SkMatrix matrix = makeMatrix();
SkPath::AddPathMode mode = makeAddPathMode();
path.addPath(src, matrix, mode);
--fPathDepth;
validate(path);
}
break;
case kReverseAddPath:
if (fPathDepth < fPathDepthLimit) {
++fPathDepth;
SkPath src = makePath();
validate(src);
path.reverseAddPath(src);
--fPathDepth;
validate(path);
}
break;
case kMoveToPath: {
SkScalar x = makeScalar();
SkScalar y = makeScalar();
path.moveTo(x, y);
validate(path);
} break;
case kRMoveToPath: {
SkScalar x = makeScalar();
SkScalar y = makeScalar();
path.rMoveTo(x, y);
validate(path);
} break;
case kLineToPath: {
SkScalar x = makeScalar();
SkScalar y = makeScalar();
path.lineTo(x, y);
validate(path);
} break;
case kRLineToPath: {
SkScalar x = makeScalar();
SkScalar y = makeScalar();
path.rLineTo(x, y);
validate(path);
} break;
case kQuadToPath: {
SkPoint pt[2];
makePointArray(SK_ARRAY_COUNT(pt), pt);
path.quadTo(pt[0], pt[1]);
validate(path);
} break;
case kRQuadToPath: {
SkPoint pt[2];
makePointArray(SK_ARRAY_COUNT(pt), pt);
path.rQuadTo(pt[0].fX, pt[0].fY, pt[1].fX, pt[1].fY);
validate(path);
} break;
case kConicToPath: {
SkPoint pt[2];
makePointArray(SK_ARRAY_COUNT(pt), pt);
SkScalar weight = makeScalar();
path.conicTo(pt[0], pt[1], weight);
validate(path);
} break;
case kRConicToPath: {
SkPoint pt[2];
makePointArray(SK_ARRAY_COUNT(pt), pt);
SkScalar weight = makeScalar();
path.rConicTo(pt[0].fX, pt[0].fY, pt[1].fX, pt[1].fY, weight);
validate(path);
} break;
case kCubicToPath: {
SkPoint pt[3];
makePointArray(SK_ARRAY_COUNT(pt), pt);
path.cubicTo(pt[0], pt[1], pt[2]);
validate(path);
} break;
case kRCubicToPath: {
SkPoint pt[3];
makePointArray(SK_ARRAY_COUNT(pt), pt);
path.rCubicTo(pt[0].fX, pt[0].fY, pt[1].fX, pt[1].fY, pt[2].fX, pt[2].fY);
validate(path);
} break;
case kArcToPath: {
SkPoint pt[2];
makePointArray(SK_ARRAY_COUNT(pt), pt);
SkScalar radius = makeScalar();
path.arcTo(pt[0], pt[1], radius);
validate(path);
} break;
case kArcTo2Path: {
SkRect oval = makeRect();
SkScalar startAngle = makeAngle();
SkScalar sweepAngle = makeAngle();
bool forceMoveTo = makeBool();
path.arcTo(oval, startAngle, sweepAngle, forceMoveTo);
validate(path);
} break;
case kClosePath:
path.close();
validate(path);
break;
}
}
}
return path;
}