File: ClipList.cpp

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// Copyright 2014 The Chromium 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 "modules/canvas2d/ClipList.h"

#include "platform/transforms/AffineTransform.h"
#include "third_party/skia/include/core/SkCanvas.h"
#include "third_party/skia/include/pathops/SkPathOps.h"

namespace blink {

ClipList::ClipList(const ClipList& other) : m_clipList(other.m_clipList) {}

void ClipList::clipPath(const SkPath& path,
                        AntiAliasingMode antiAliasingMode,
                        const SkMatrix& ctm) {
  ClipOp newClip;
  newClip.m_antiAliasingMode = antiAliasingMode;
  newClip.m_path = path;
  newClip.m_path.transform(ctm);
  if (m_clipList.isEmpty())
    m_currentClipPath = path;
  else
    Op(m_currentClipPath, path, SkPathOp::kIntersect_SkPathOp,
       &m_currentClipPath);
  m_clipList.push_back(newClip);
}

void ClipList::playback(SkCanvas* canvas) const {
  for (const ClipOp* it = m_clipList.begin(); it < m_clipList.end(); it++) {
    canvas->clipPath(it->m_path, SkClipOp::kIntersect,
                     it->m_antiAliasingMode == AntiAliased);
  }
}

const SkPath& ClipList::getCurrentClipPath() const {
  return m_currentClipPath;
}

ClipList::ClipOp::ClipOp() : m_antiAliasingMode(AntiAliased) {}

ClipList::ClipOp::ClipOp(const ClipOp& other)
    : m_path(other.m_path), m_antiAliasingMode(other.m_antiAliasingMode) {}

}  // namespace blink