Adding upstream version 110.0.1.upstream/110.0.1upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 262 insertions, 0 deletions

diff --git a/gfx/2d/PathSkia.cpp b/gfx/2d/PathSkia.cpp
new file mode 100644
index 0000000000..0824ae7c65
--- /dev/null
+++ b/gfx/2d/PathSkia.cpp
@@ -0,0 +1,262 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* 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 "HelpersSkia.h"
+#include "PathHelpers.h"
+#include "skia/src/core/SkDraw.h"
+#include "skia/src/core/SkGeometry.h"
+
+namespace mozilla::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));
+  mCurrentPoint = aPoint;
+  mBeginPoint = aPoint;
+}
+
+void PathBuilderSkia::LineTo(const Point& aPoint) {
+  if (!mPath.countPoints()) {
+    MoveTo(aPoint);
+  } else {
+    mPath.lineTo(SkFloatToScalar(aPoint.x), SkFloatToScalar(aPoint.y));
+  }
+  mCurrentPoint = aPoint;
+}
+
+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));
+  mCurrentPoint = aCP3;
+}
+
+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));
+  mCurrentPoint = aCP2;
+}
+
+void PathBuilderSkia::Close() {
+  mPath.close();
+  mCurrentPoint = mBeginPoint;
+}
+
+void PathBuilderSkia::Arc(const Point& aOrigin, float aRadius,
+                          float aStartAngle, float aEndAngle,
+                          bool aAntiClockwise) {
+  ArcToBezier(this, aOrigin, Size(aRadius, aRadius), aStartAngle, aEndAngle,
+              aAntiClockwise);
+}
+
+already_AddRefed<Path> PathBuilderSkia::Finish() {
+  RefPtr<Path> path =
+      MakeAndAddRef<PathSkia>(mPath, mFillRule, mCurrentPoint, mBeginPoint);
+  mCurrentPoint = Point(0.0, 0.0);
+  mBeginPoint = Point(0.0, 0.0);
+  return path.forget();
+}
+
+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 {
+  RefPtr<PathBuilderSkia> builder =
+      MakeAndAddRef<PathBuilderSkia>(aTransform, mPath, aFillRule);
+
+  builder->mCurrentPoint = aTransform.TransformPoint(mCurrentPoint);
+  builder->mBeginPoint = aTransform.TransformPoint(mBeginPoint);
+
+  return builder.forget();
+}
+
+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);
+}
+
+float ComputeResScaleForStroking(const Matrix& aTransform) {
+  SkMatrix skiaMatrix;
+  GfxMatrixToSkiaMatrix(aTransform, skiaMatrix);
+  return SkDraw::ComputeResScaleForStroking(skiaMatrix);
+}
+
+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, nullptr,
+                    ComputeResScaleForStroking(aTransform));
+
+  return SkPathContainsPoint(strokePath, aPoint, aTransform);
+}
+
+Rect PathSkia::GetBounds(const Matrix& aTransform) const {
+  if (!mPath.isFinite()) {
+    return Rect();
+  }
+
+  Rect bounds = SkRectToRect(mPath.computeTightBounds());
+  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.computeTightBounds());
+  return aTransform.TransformBounds(bounds);
+}
+
+Rect PathSkia::GetFastBounds(const Matrix& aTransform,
+                             const StrokeOptions* aStrokeOptions) const {
+  if (!mPath.isFinite()) {
+    return Rect();
+  }
+  SkRect bounds = mPath.getBounds();
+  if (aStrokeOptions) {
+    // If the path is stroked, ensure that the bounds are inflated by any
+    // relevant options such as line width. Avoid using dash path effects
+    // for performance and to ensure computeFastStrokeBounds succeeds.
+    SkPaint paint;
+    if (!StrokeOptionsToPaint(paint, *aStrokeOptions, false)) {
+      return Rect();
+    }
+    SkRect outBounds = SkRect::MakeEmpty();
+    bounds = paint.computeFastStrokeBounds(bounds, &outBounds);
+  }
+  return aTransform.TransformBounds(SkRectToRect(bounds));
+}
+
+int ConvertConicToQuads(const Point& aP0, const Point& aP1, const Point& aP2,
+                        float aWeight, std::vector<Point>& aQuads) {
+  SkConic conic(PointToSkPoint(aP0), PointToSkPoint(aP1), PointToSkPoint(aP2),
+                aWeight);
+  int pow2 = conic.computeQuadPOW2(0.25f);
+  aQuads.resize(1 + 2 * (1 << pow2));
+  int numQuads =
+      conic.chopIntoQuadsPOW2(reinterpret_cast<SkPoint*>(&aQuads[0]), pow2);
+  if (numQuads < 1 << pow2) {
+    aQuads.resize(1 + 2 * numQuads);
+  }
+  return numQuads;
+}
+
+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::kConic_Verb: {
+        std::vector<Point> quads;
+        int numQuads = ConvertConicToQuads(
+            SkPointToPoint(points[0]), SkPointToPoint(points[1]),
+            SkPointToPoint(points[2]), iter.conicWeight(), quads);
+        for (int i = 0; i < numQuads; i++) {
+          aSink->QuadraticBezierTo(quads[2 * i + 1], quads[2 * i + 2]);
+        }
+        break;
+      }
+      case SkPath::kClose_Verb:
+        aSink->Close();
+        break;
+      default:
+        MOZ_ASSERT(false);
+        // Unexpected verb found in path!
+    }
+  }
+}
+
+Maybe<Rect> PathSkia::AsRect() const {
+  SkRect rect;
+  if (mPath.isRect(&rect)) {
+    return Some(SkRectToRect(rect));
+  }
+  return Nothing();
+}
+}  // namespace mozilla::gfx