sky/engine/core/painting/Canvas.idl

// Copyright 2015 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.

// TODO(mpcomplete): Figure out a better SkMatrix representation.
[
  Constructor(PictureRecorder recorder, Rect bounds),
  RaisesException=Constructor,
] interface Canvas {
  void save();
  // TODO(jackson): Paint should be optional, but making it optional causes crash
  void saveLayer(Rect bounds, /* optional */ Paint paint);
  void restore();
  int getSaveCount(); // returns 1 for a clean canvas; each call to save() or saveLayer() increments it, and each call to restore() decrements it.

  void translate(float dx, float dy);
  void scale(float sx, float sy);
  void rotate(float radians);
  void skew(float sx, float sy);
  [RaisesException] void concat(Float32List matrix4);

  [RaisesException] void setMatrix(Float32List matrix4);
  Float32List getTotalMatrix();

  void clipRect(Rect rect);
  void clipRRect(RRect rrect);
  void clipPath(Path path);

  void drawColor(Color color, TransferMode transferMode);
  void drawLine(Point p1, Point p2, Paint paint);
  void drawPaint(Paint paint);
  void drawRect(Rect rect, Paint paint);
  void drawRRect(RRect rrect, Paint paint);
  void drawDRRect(RRect outer, RRect inner, Paint paint);
  void drawOval(Rect rect, Paint paint);
  void drawCircle(Point c, float radius, Paint paint);
  void drawPath(Path path, Paint paint);
  void drawImage(Image image, Point p, Paint paint);
  void drawImageRect(Image image, Rect src, Rect dst, Paint paint);
  void drawPicture(Picture picture);
  void drawDrawable(Drawable drawable);
  void drawPaintingNode(PaintingNode paintingNode, Point p);

  // TODO(eseidel): Paint should be optional, but optional doesn't work.
  [RaisesException] void drawAtlas(Image image,
      sequence<RSTransform> transforms, sequence<Rect> rects,
      sequence<Color> colors, TransferMode mode, Rect cullRect, Paint paint);
};