import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

gfx/2d/PathSkia.cpp

@@ -0,0 +1,237 @@
+/* -*- 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)
+{
+  Matrix inverse = aTransform;
+  if (!inverse.Invert()) {
+    return false;
+  }
+
+  SkPoint point = PointToSkPoint(inverse.TransformPoint(aPoint));
+  return aPath.contains(point.fX, point.fY);
+}
+
+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;
+  if (!StrokeOptionsToPaint(paint, aStrokeOptions)) {
+    return false;
+  }
+
+  SkPath strokePath;
+  paint.getFillPath(mPath, &strokePath);
+
+  return SkPathContainsPoint(strokePath, aPoint, aTransform);
+}
+
+Rect
+PathSkia::GetBounds(const Matrix &aTransform) const
+{
+  if (!mPath.isFinite()) {
+    return Rect();
+  }
+
+  Rect bounds = SkRectToRect(mPath.getBounds());
+  return aTransform.TransformBounds(bounds);
+}
+
+Rect
+PathSkia::GetStrokedBounds(const StrokeOptions &aStrokeOptions,
+                           const Matrix &aTransform) const
+{
+  if (!mPath.isFinite()) {
+    return Rect();
+  }
+
+  SkPaint paint;
+  if (!StrokeOptionsToPaint(paint, aStrokeOptions)) {
+    return Rect();
+  }
+
+  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