1/*
2 * Copyright (C) 2011 Apple Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#pragma once
27
28#include "FloatSize.h"
29#include "GeneratedImage.h"
30#include "Image.h"
31#include <wtf/RefPtr.h>
32
33namespace WebCore {
34
35class CrossfadeGeneratedImage final : public GeneratedImage {
36public:
37 static Ref<CrossfadeGeneratedImage> create(Image& fromImage, Image& toImage, float percentage, const FloatSize& crossfadeSize, const FloatSize& size)
38 {
39 return adoptRef(*new CrossfadeGeneratedImage(fromImage, toImage, percentage, crossfadeSize, size));
40 }
41
42 void setContainerSize(const FloatSize&) override { }
43 bool usesContainerSize() const override { return false; }
44 bool hasRelativeWidth() const override { return false; }
45 bool hasRelativeHeight() const override { return false; }
46
47 FloatSize size() const override { return m_crossfadeSize; }
48
49protected:
50 ImageDrawResult draw(GraphicsContext&, const FloatRect& dstRect, const FloatRect& srcRect, CompositeOperator, BlendMode, DecodingMode, ImageOrientationDescription) override;
51 void drawPattern(GraphicsContext&, const FloatRect& dstRect, const FloatRect& srcRect, const AffineTransform& patternTransform, const FloatPoint& phase, const FloatSize& spacing, CompositeOperator, BlendMode) override;
52
53 CrossfadeGeneratedImage(Image& fromImage, Image& toImage, float percentage, const FloatSize& crossfadeSize, const FloatSize&);
54
55private:
56 bool isCrossfadeGeneratedImage() const override { return true; }
57 void dump(WTF::TextStream&) const override;
58
59 void drawCrossfade(GraphicsContext&);
60
61 Ref<Image> m_fromImage;
62 Ref<Image> m_toImage;
63
64 float m_percentage;
65 FloatSize m_crossfadeSize;
66};
67
68}
69
70SPECIALIZE_TYPE_TRAITS_IMAGE(CrossfadeGeneratedImage)
71