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 "core/rendering/svg/RenderSVGResourceContainer.h"
26#include "core/svg/SVGGradientElement.h"
27#include "platform/geometry/FloatRect.h"
28#include "platform/graphics/Gradient.h"
29#include "platform/graphics/ImageBuffer.h"
30#include "platform/transforms/AffineTransform.h"
31#include "wtf/HashMap.h"
32
33namespace blink {
34
35struct GradientData {
36    WTF_MAKE_FAST_ALLOCATED;
37public:
38    RefPtr<Gradient> gradient;
39    AffineTransform userspaceTransform;
40};
41
42class GraphicsContext;
43
44class RenderSVGResourceGradient : public RenderSVGResourceContainer {
45public:
46    explicit RenderSVGResourceGradient(SVGGradientElement*);
47
48    virtual void removeAllClientsFromCache(bool markForInvalidation = true) OVERRIDE FINAL;
49    virtual void removeClientFromCache(RenderObject*, bool markForInvalidation = true) OVERRIDE FINAL;
50
51    virtual bool applyResource(RenderObject*, RenderStyle*, GraphicsContext*&, unsigned short resourceMode) OVERRIDE FINAL;
52    virtual void postApplyResource(RenderObject*, GraphicsContext*&) OVERRIDE FINAL;
53
54protected:
55    void addStops(GradientData*, const Vector<Gradient::ColorStop>&) const;
56
57    virtual SVGUnitTypes::SVGUnitType gradientUnits() const = 0;
58    virtual void calculateGradientTransform(AffineTransform&) = 0;
59    virtual bool collectGradientAttributes(SVGGradientElement*) = 0;
60    virtual void buildGradient(GradientData*) const = 0;
61
62    GradientSpreadMethod platformSpreadMethodFromSVGType(SVGSpreadMethodType) const;
63
64private:
65    bool m_shouldCollectGradientAttributes : 1;
66    HashMap<RenderObject*, OwnPtr<GradientData> > m_gradientMap;
67};
68
69}
70
71#endif
72