third_party/blink/renderer/platform/geometry/stroke_data.cc

// Copyright (C) 2013 Google Inc. All rights reserved.
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#include "third_party/blink/renderer/platform/geometry/stroke_data.h"

#include <memory>

namespace blink {

void StrokeData::SetLineDash(const DashArray& dashes, float dash_offset) {
  wtf_size_t dash_length = dashes.size();
  if (!dash_length) {
    dash_.reset();
    return;
  }

  wtf_size_t count = !(dash_length % 2) ? dash_length : dash_length * 2;
  auto intervals = std::make_unique<SkScalar[]>(count);

  for (wtf_size_t i = 0; i < count; i++) {
    intervals[i] = dashes[i % dash_length];
  }

  dash_ = cc::PathEffect::MakeDash(intervals.get(), count, dash_offset);
}

void StrokeData::SetDashEffect(sk_sp<cc::PathEffect> dash_effect) {
  dash_ = std::move(dash_effect);
}

void StrokeData::SetupPaint(cc::PaintFlags* flags) const {
  flags->setStyle(cc::PaintFlags::kStroke_Style);
  flags->setStrokeWidth(SkFloatToScalar(thickness_));
  flags->setStrokeCap(line_cap_);
  flags->setStrokeJoin(line_join_);
  flags->setStrokeMiter(SkFloatToScalar(miter_limit_));
  flags->setPathEffect(dash_);
}

}  // namespace blink