paint.h

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// 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.
 
#ifndef FLUTTER_LIB_UI_PAINTING_PAINT_H_
#define FLUTTER_LIB_UI_PAINTING_PAINT_H_
 
#include "flutter/display_list/display_list.h"
#include "flutter/display_list/dl_op_flags.h"
#include "third_party/skia/include/core/SkPaint.h"
#include "third_party/tonic/converter/dart_converter.h"
 
namespace flutter {
 
class Paint {
 public:
  Paint() = default;
  Paint(Dart_Handle paint_objects, Dart_Handle paint_data);
 
  const DlPaint* paint(DlPaint& paint,
                       const DisplayListAttributeFlags& flags) const;
 
  void toDlPaint(DlPaint& paint) const;
 
  bool isNull() const { return Dart_IsNull(paint_data_); }
  bool isNotNull() const { return !Dart_IsNull(paint_data_); }
 
 private:
  friend struct tonic::DartConverter<Paint>;
 
  Dart_Handle paint_objects_;
  Dart_Handle paint_data_;
};
 
// The PaintData argument is a placeholder to receive encoded data for Paint
// objects. The data is actually processed by DartConverter<Paint>, which reads
// both at the given index and at the next index (which it assumes is a byte
// data for a Paint object).
class PaintData {};
 
}  // namespace flutter
 
namespace tonic {
 
template <>
struct DartConverter<flutter::Paint> {
  static flutter::Paint FromArguments(Dart_NativeArguments args,
                                      int index,
                                      Dart_Handle& exception);
};
 
template <>
struct DartConverter<flutter::PaintData> {
  static flutter::PaintData FromArguments(Dart_NativeArguments args,
                                          int index,
                                          Dart_Handle& exception);
};
 
}  // namespace tonic
 
#endif  // FLUTTER_LIB_UI_PAINTING_PAINT_H_