display_list/dl_op_flags.cc

// Copyright 2013 The Flutter Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "flutter/display_list/dl_op_flags.h"
#include "flutter/display_list/effects/dl_path_effect.h"

namespace flutter {

const DisplayListSpecialGeometryFlags DisplayListAttributeFlags::WithPathEffect(
    const DlPathEffect* effect,
    bool is_stroked) const {
  if (is_geometric() && effect) {
    switch (effect->type()) {
      case DlPathEffectType::kDash: {
        // Dashing has no effect on filled geometry.
        if (is_stroked) {
          // A dash effect has a very simple impact. It cannot introduce any
          // miter joins that weren't already present in the original path
          // and it does not grow the bounds of the path, but it can add
          // end caps to areas that might not have had them before so all
          // we need to do is to indicate the potential for diagonal
          // end caps and move on.
          return special_flags_.with(kMayHaveCaps | kMayHaveDiagonalCaps);
        }
      }
    }
  }
  return special_flags_;
}

}  // namespace flutter