chromium/src/third_party/blink/renderer/modules/canvas/canvas2d/canvas_style.h

/*
 * Copyright (C) 2006, 2008 Apple Inc. All rights reserved.
 * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef THIRD_PARTY_BLINK_RENDERER_MODULES_CANVAS_CANVAS2D_CANVAS_STYLE_H_
#define THIRD_PARTY_BLINK_RENDERER_MODULES_CANVAS_CANVAS2D_CANVAS_STYLE_H_

#include "third_party/blink/renderer/platform/graphics/color.h"
#include "third_party/blink/renderer/platform/graphics/paint/paint_flags.h"
#include "third_party/blink/renderer/platform/heap/handle.h"
#include "third_party/blink/renderer/platform/wtf/assertions.h"
#include "third_party/blink/renderer/platform/wtf/text/wtf_string.h"

namespace blink {

class CanvasGradient;
class CanvasPattern;
class HTMLCanvasElement;

class CanvasStyle final : public GarbageCollected<CanvasStyle> {
 public:
  explicit CanvasStyle(RGBA32);
  explicit CanvasStyle(CanvasGradient*);
  explicit CanvasStyle(CanvasPattern*);

  String GetColor() const {
    DCHECK_EQ(type_, kColorRGBA);
    return Color(rgba_).Serialized();
  }
  CanvasGradient* GetCanvasGradient() const { return gradient_.Get(); }
  CanvasPattern* GetCanvasPattern() const { return pattern_; }

  void ApplyToFlags(PaintFlags&) const;
  RGBA32 PaintColor() const;

  bool IsEquivalentRGBA(RGBA32 rgba) const {
    return type_ == kColorRGBA && rgba_ == rgba;
  }

  void Trace(Visitor*) const;

 private:
  enum Type { kColorRGBA, kGradient, kImagePattern };

  Type type_;
  RGBA32 rgba_;

  Member<CanvasGradient> gradient_;
  Member<CanvasPattern> pattern_;
};

bool ParseColorOrCurrentColor(Color& parsed_color,
                              const String& color_string,
                              HTMLCanvasElement*);

}  // namespace blink

#endif