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/*
* Copyright (C) Research In Motion Limited 2009-2010. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifndef LayoutSVGResourcePaintServer_h
#define LayoutSVGResourcePaintServer_h
#include "core/layout/svg/LayoutSVGResourceContainer.h"
#include "platform/graphics/Color.h"
#include "platform/graphics/Gradient.h"
#include "platform/graphics/Pattern.h"
#include "platform/transforms/AffineTransform.h"
#include "wtf/Allocator.h"
class SkPaint;
namespace blink {
enum LayoutSVGResourceMode {
ApplyToFillMode,
ApplyToStrokeMode,
};
class LayoutObject;
class LayoutSVGResourcePaintServer;
class ComputedStyle;
class SVGPaintServer {
STACK_ALLOCATED();
public:
explicit SVGPaintServer(Color);
SVGPaintServer(PassRefPtr<Gradient>, const AffineTransform&);
SVGPaintServer(PassRefPtr<Pattern>, const AffineTransform&);
static SVGPaintServer requestForLayoutObject(const LayoutObject&,
const ComputedStyle&,
LayoutSVGResourceMode);
static bool existsForLayoutObject(const LayoutObject&,
const ComputedStyle&,
LayoutSVGResourceMode);
void applyToSkPaint(SkPaint&, float paintAlpha);
static SVGPaintServer invalid() {
return SVGPaintServer(Color(Color::transparent));
}
bool isValid() const { return m_color != Color::transparent; }
bool isTransformDependent() const { return m_gradient || m_pattern; }
void prependTransform(const AffineTransform&);
private:
RefPtr<Gradient> m_gradient;
RefPtr<Pattern> m_pattern;
AffineTransform m_transform; // Used for gradient/pattern shaders.
Color m_color;
};
// If |SVGPaintDescription::hasFallback| is true, |SVGPaintDescription::color|
// is set to a fallback color.
struct SVGPaintDescription {
STACK_ALLOCATED();
SVGPaintDescription()
: resource(nullptr), isValid(false), hasFallback(false) {}
SVGPaintDescription(Color color)
: resource(nullptr), color(color), isValid(true), hasFallback(false) {}
SVGPaintDescription(LayoutSVGResourcePaintServer* resource)
: resource(resource), isValid(true), hasFallback(false) {
ASSERT(resource);
}
SVGPaintDescription(LayoutSVGResourcePaintServer* resource,
Color fallbackColor)
: resource(resource),
color(fallbackColor),
isValid(true),
hasFallback(true) {
ASSERT(resource);
}
LayoutSVGResourcePaintServer* resource;
Color color;
bool isValid;
bool hasFallback;
};
class LayoutSVGResourcePaintServer : public LayoutSVGResourceContainer {
public:
LayoutSVGResourcePaintServer(SVGElement*);
~LayoutSVGResourcePaintServer() override;
virtual SVGPaintServer preparePaintServer(const LayoutObject&) = 0;
// Helper utilities used in to access the underlying resources for DRT.
static SVGPaintDescription requestPaintDescription(const LayoutObject&,
const ComputedStyle&,
LayoutSVGResourceMode);
};
DEFINE_TYPE_CASTS(LayoutSVGResourcePaintServer,
LayoutSVGResourceContainer,
resource,
resource->isSVGPaintServer(),
resource.isSVGPaintServer());
} // namespace blink
#endif
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