mirror of
https://github.com/classilla/tenfourfox.git
synced 2024-09-11 02:56:06 +00:00
258 lines
6.9 KiB
C++
258 lines
6.9 KiB
C++
/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-
|
|
* This Source Code Form is subject to the terms of the Mozilla Public
|
|
* License, v. 2.0. If a copy of the MPL was not distributed with this
|
|
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
|
|
|
|
#include "PathSkia.h"
|
|
#include <math.h>
|
|
#include "DrawTargetSkia.h"
|
|
#include "Logging.h"
|
|
#include "HelpersSkia.h"
|
|
#include "PathHelpers.h"
|
|
|
|
namespace mozilla {
|
|
namespace gfx {
|
|
|
|
PathBuilderSkia::PathBuilderSkia(const Matrix& aTransform, const SkPath& aPath, FillRule aFillRule)
|
|
: mPath(aPath)
|
|
{
|
|
SkMatrix matrix;
|
|
GfxMatrixToSkiaMatrix(aTransform, matrix);
|
|
mPath.transform(matrix);
|
|
SetFillRule(aFillRule);
|
|
}
|
|
|
|
PathBuilderSkia::PathBuilderSkia(FillRule aFillRule)
|
|
{
|
|
SetFillRule(aFillRule);
|
|
}
|
|
|
|
void
|
|
PathBuilderSkia::SetFillRule(FillRule aFillRule)
|
|
{
|
|
mFillRule = aFillRule;
|
|
if (mFillRule == FillRule::FILL_WINDING) {
|
|
mPath.setFillType(SkPath::kWinding_FillType);
|
|
} else {
|
|
mPath.setFillType(SkPath::kEvenOdd_FillType);
|
|
}
|
|
}
|
|
|
|
void
|
|
PathBuilderSkia::MoveTo(const Point &aPoint)
|
|
{
|
|
mPath.moveTo(SkFloatToScalar(aPoint.x), SkFloatToScalar(aPoint.y));
|
|
}
|
|
|
|
void
|
|
PathBuilderSkia::LineTo(const Point &aPoint)
|
|
{
|
|
if (!mPath.countPoints()) {
|
|
MoveTo(aPoint);
|
|
} else {
|
|
mPath.lineTo(SkFloatToScalar(aPoint.x), SkFloatToScalar(aPoint.y));
|
|
}
|
|
}
|
|
|
|
void
|
|
PathBuilderSkia::BezierTo(const Point &aCP1,
|
|
const Point &aCP2,
|
|
const Point &aCP3)
|
|
{
|
|
if (!mPath.countPoints()) {
|
|
MoveTo(aCP1);
|
|
}
|
|
mPath.cubicTo(SkFloatToScalar(aCP1.x), SkFloatToScalar(aCP1.y),
|
|
SkFloatToScalar(aCP2.x), SkFloatToScalar(aCP2.y),
|
|
SkFloatToScalar(aCP3.x), SkFloatToScalar(aCP3.y));
|
|
}
|
|
|
|
void
|
|
PathBuilderSkia::QuadraticBezierTo(const Point &aCP1,
|
|
const Point &aCP2)
|
|
{
|
|
if (!mPath.countPoints()) {
|
|
MoveTo(aCP1);
|
|
}
|
|
mPath.quadTo(SkFloatToScalar(aCP1.x), SkFloatToScalar(aCP1.y),
|
|
SkFloatToScalar(aCP2.x), SkFloatToScalar(aCP2.y));
|
|
}
|
|
|
|
void
|
|
PathBuilderSkia::Close()
|
|
{
|
|
mPath.close();
|
|
}
|
|
|
|
void
|
|
PathBuilderSkia::Arc(const Point &aOrigin, float aRadius, float aStartAngle,
|
|
float aEndAngle, bool aAntiClockwise)
|
|
{
|
|
ArcToBezier(this, aOrigin, Size(aRadius, aRadius), aStartAngle, aEndAngle, aAntiClockwise);
|
|
}
|
|
|
|
Point
|
|
PathBuilderSkia::CurrentPoint() const
|
|
{
|
|
int pointCount = mPath.countPoints();
|
|
if (!pointCount) {
|
|
return Point(0, 0);
|
|
}
|
|
SkPoint point = mPath.getPoint(pointCount - 1);
|
|
return Point(SkScalarToFloat(point.fX), SkScalarToFloat(point.fY));
|
|
}
|
|
|
|
already_AddRefed<Path>
|
|
PathBuilderSkia::Finish()
|
|
{
|
|
return MakeAndAddRef<PathSkia>(mPath, mFillRule);
|
|
}
|
|
|
|
void
|
|
PathBuilderSkia::AppendPath(const SkPath &aPath)
|
|
{
|
|
mPath.addPath(aPath);
|
|
}
|
|
|
|
already_AddRefed<PathBuilder>
|
|
PathSkia::CopyToBuilder(FillRule aFillRule) const
|
|
{
|
|
return TransformedCopyToBuilder(Matrix(), aFillRule);
|
|
}
|
|
|
|
already_AddRefed<PathBuilder>
|
|
PathSkia::TransformedCopyToBuilder(const Matrix &aTransform, FillRule aFillRule) const
|
|
{
|
|
return MakeAndAddRef<PathBuilderSkia>(aTransform, mPath, aFillRule);
|
|
}
|
|
|
|
static bool
|
|
SkPathContainsPoint(const SkPath& aPath, const Point& aPoint, const Matrix& aTransform)
|
|
{
|
|
// Skia's SkPath::contains method does not support the inclusive boundary conditions
|
|
// required by canvas (bug 831259), so we employ the same workaround as used by Blink.
|
|
// First, we scale the path up to the largest coordinates that won't cause precision
|
|
// issues (2^15) and consequently also scale larger paths than that down.
|
|
// Next, we make a clip region representing the point to be tested and convert the
|
|
// path to a region within this clip region.
|
|
// If the resulting region is non-empty, then the path should contain the point.
|
|
Matrix inverse = aTransform;
|
|
inverse.Invert();
|
|
SkPoint point = PointToSkPoint(inverse * aPoint);
|
|
|
|
SkRect bounds = aPath.getBounds();
|
|
if (point.fX < bounds.fLeft || point.fY < bounds.fTop ||
|
|
point.fX > bounds.fRight || point.fY > bounds.fBottom) {
|
|
return false;
|
|
}
|
|
|
|
SkPoint scale = SkPoint::Make(SkMaxScalar(bounds.fRight, -bounds.fLeft),
|
|
SkMaxScalar(bounds.fBottom, -bounds.fTop));
|
|
if (SkScalarNearlyZero(scale.fX) || SkScalarNearlyZero(scale.fY)) {
|
|
return false;
|
|
}
|
|
scale.set(SkMaxScalar(scale.fX, SkScalarAbs(point.fX) + SK_Scalar1),
|
|
SkMaxScalar(scale.fY, SkScalarAbs(point.fY) + SK_Scalar1));
|
|
|
|
const SkScalar maxCoord = SkIntToScalar(1 << 15);
|
|
SkMatrix scaleMatrix;
|
|
scaleMatrix.setScale(maxCoord / scale.fX, maxCoord / scale.fY);
|
|
|
|
SkPath scaledPath(aPath);
|
|
scaledPath.transform(scaleMatrix, nullptr);
|
|
|
|
scaleMatrix.mapPoints(&point, 1);
|
|
SkRegion pointClip(SkIRect::MakeXYWH(SkScalarRoundToInt(point.fX) - 1,
|
|
SkScalarRoundToInt(point.fY) - 1,
|
|
2, 2));
|
|
|
|
SkRegion pathRegion;
|
|
return pathRegion.setPath(scaledPath, pointClip);
|
|
}
|
|
|
|
bool
|
|
PathSkia::ContainsPoint(const Point &aPoint, const Matrix &aTransform) const
|
|
{
|
|
if (!mPath.isFinite()) {
|
|
return false;
|
|
}
|
|
|
|
return SkPathContainsPoint(mPath, aPoint, aTransform);
|
|
}
|
|
|
|
bool
|
|
PathSkia::StrokeContainsPoint(const StrokeOptions &aStrokeOptions,
|
|
const Point &aPoint,
|
|
const Matrix &aTransform) const
|
|
{
|
|
if (!mPath.isFinite()) {
|
|
return false;
|
|
}
|
|
|
|
SkPaint paint;
|
|
StrokeOptionsToPaint(paint, aStrokeOptions);
|
|
|
|
SkPath strokePath;
|
|
paint.getFillPath(mPath, &strokePath);
|
|
|
|
return SkPathContainsPoint(strokePath, aPoint, aTransform);
|
|
}
|
|
|
|
Rect
|
|
PathSkia::GetBounds(const Matrix &aTransform) const
|
|
{
|
|
Rect bounds = SkRectToRect(mPath.getBounds());
|
|
return aTransform.TransformBounds(bounds);
|
|
}
|
|
|
|
Rect
|
|
PathSkia::GetStrokedBounds(const StrokeOptions &aStrokeOptions,
|
|
const Matrix &aTransform) const
|
|
{
|
|
SkPaint paint;
|
|
StrokeOptionsToPaint(paint, aStrokeOptions);
|
|
|
|
SkPath result;
|
|
paint.getFillPath(mPath, &result);
|
|
|
|
Rect bounds = SkRectToRect(result.getBounds());
|
|
return aTransform.TransformBounds(bounds);
|
|
}
|
|
|
|
void
|
|
PathSkia::StreamToSink(PathSink *aSink) const
|
|
{
|
|
SkPath::RawIter iter(mPath);
|
|
|
|
SkPoint points[4];
|
|
SkPath::Verb currentVerb;
|
|
while ((currentVerb = iter.next(points)) != SkPath::kDone_Verb) {
|
|
switch (currentVerb) {
|
|
case SkPath::kMove_Verb:
|
|
aSink->MoveTo(SkPointToPoint(points[0]));
|
|
break;
|
|
case SkPath::kLine_Verb:
|
|
aSink->LineTo(SkPointToPoint(points[1]));
|
|
break;
|
|
case SkPath::kCubic_Verb:
|
|
aSink->BezierTo(SkPointToPoint(points[1]),
|
|
SkPointToPoint(points[2]),
|
|
SkPointToPoint(points[3]));
|
|
break;
|
|
case SkPath::kQuad_Verb:
|
|
aSink->QuadraticBezierTo(SkPointToPoint(points[1]),
|
|
SkPointToPoint(points[2]));
|
|
break;
|
|
case SkPath::kClose_Verb:
|
|
aSink->Close();
|
|
break;
|
|
default:
|
|
MOZ_ASSERT(false);
|
|
// Unexpected verb found in path!
|
|
}
|
|
}
|
|
}
|
|
|
|
} // namespace gfx
|
|
} // namespace mozilla
|