1/*
2 * Copyright (C) 2006 Nikolas Zimmermann <zimmermann@kde.org>
3 * Copyright (C) 2008 Eric Seidel <eric@webkit.org>
4 * Copyright (C) Research In Motion Limited 2010. All rights reserved.
5 *
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Library General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
10 *
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
14 * Library General Public License for more details.
15 *
16 * You should have received a copy of the GNU Library General Public License
17 * along with this library; see the file COPYING.LIB.  If not, write to
18 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
19 * Boston, MA 02110-1301, USA.
20 */
21
22#ifndef RenderSVGResourceGradient_h
23#define RenderSVGResourceGradient_h
24
25#include "Gradient.h"
26#include "ImageBuffer.h"
27#include "RenderSVGResourceContainer.h"
28#include "SVGGradientElement.h"
29#include <memory>
30#include <wtf/HashMap.h>
31
32namespace WebCore {
33
34struct GradientData {
35    WTF_MAKE_FAST_ALLOCATED;
36public:
37    RefPtr<Gradient> gradient;
38    AffineTransform userspaceTransform;
39};
40
41class GraphicsContext;
42
43class RenderSVGResourceGradient : public RenderSVGResourceContainer {
44public:
45    SVGGradientElement& gradientElement() const { return static_cast<SVGGradientElement&>(RenderSVGResourceContainer::element()); }
46
47    virtual void removeAllClientsFromCache(bool markForInvalidation = true) override final;
48    virtual void removeClientFromCache(RenderElement&, bool markForInvalidation = true) override final;
49
50    virtual bool applyResource(RenderElement&, const RenderStyle&, GraphicsContext*&, unsigned short resourceMode) override final;
51    virtual void postApplyResource(RenderElement&, GraphicsContext*&, unsigned short resourceMode, const Path*, const RenderSVGShape*) override final;
52    virtual FloatRect resourceBoundingBox(const RenderObject&) override final { return FloatRect(); }
53
54protected:
55    RenderSVGResourceGradient(SVGGradientElement&, PassRef<RenderStyle>);
56
57    void element() const = delete;
58
59    void addStops(GradientData*, const Vector<Gradient::ColorStop>&) const;
60
61    virtual SVGUnitTypes::SVGUnitType gradientUnits() const = 0;
62    virtual void calculateGradientTransform(AffineTransform&) = 0;
63    virtual bool collectGradientAttributes() = 0;
64    virtual void buildGradient(GradientData*) const = 0;
65
66    GradientSpreadMethod platformSpreadMethodFromSVGType(SVGSpreadMethodType) const;
67
68private:
69    bool m_shouldCollectGradientAttributes : 1;
70    HashMap<RenderObject*, std::unique_ptr<GradientData>> m_gradientMap;
71
72#if USE(CG)
73    GraphicsContext* m_savedContext;
74    std::unique_ptr<ImageBuffer> m_imageBuffer;
75#endif
76};
77
78}
79
80#endif
81