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/*
* Copyright (C) 1999 Lars Knoll (knoll@kde.org)
* (C) 1999 Antti Koivisto (koivisto@kde.org)
* Copyright (C) 2003-2022 Apple Inc. All rights reserved.
* Copyright (C) 2010 Google Inc. 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.
*
*/
#pragma once
#include "RenderBoxModelObject.h"
namespace WebCore {
class GraphicsContext;
class FloatRoundedRect;
enum class ShadowStyle : bool;
class FloatRoundedRect;
enum BaseBackgroundColorUsage {
BaseBackgroundColorUse,
BaseBackgroundColorOnly,
BaseBackgroundColorSkip
};
struct BackgroundImageGeometry {
BackgroundImageGeometry(const LayoutRect& destinationRect, const LayoutSize& tileSizeWithoutPixelSnapping, const LayoutSize& tileSize, const LayoutSize& phase, const LayoutSize& spaceSize, bool fixedAttachment);
LayoutSize relativePhase() const
{
LayoutSize relativePhase = phase;
relativePhase += destinationRect.location() - destinationOrigin;
return relativePhase;
}
void clip(const LayoutRect& clipRect) { destinationRect.intersect(clipRect); }
LayoutRect destinationRect;
LayoutPoint destinationOrigin;
LayoutSize tileSizeWithoutPixelSnapping;
LayoutSize tileSize;
LayoutSize phase;
LayoutSize spaceSize;
bool hasNonLocalGeometry; // Has background-attachment: fixed. Implies that we can't always cheaply compute destRect.
};
class BackgroundPainter {
public:
BackgroundPainter(RenderBoxModelObject&, const PaintInfo&);
void setOverrideClip(FillBox overrideClip) { m_overrideClip = overrideClip; }
void setOverrideOrigin(FillBox overrideOrigin) { m_overrideOrigin = overrideOrigin; }
void paintBackground(const LayoutRect&, BleedAvoidance) const;
void paintFillLayers(const Color&, const FillLayer&, const LayoutRect&, BleedAvoidance, CompositeOperator, RenderElement* backgroundObject = nullptr) const;
void paintFillLayer(const Color&, const FillLayer&, const LayoutRect&, BleedAvoidance, const InlineIterator::InlineBoxIterator&, const LayoutRect& backgroundImageStrip = { }, CompositeOperator = CompositeOperator::SourceOver, RenderElement* backgroundObject = nullptr, BaseBackgroundColorUsage = BaseBackgroundColorUse) const;
void paintBoxShadow(const LayoutRect&, const RenderStyle&, ShadowStyle, RectEdges<bool> closedEdges = { true, true, true, true }) const;
static bool paintsOwnBackground(const RenderBoxModelObject&);
static BackgroundImageGeometry calculateBackgroundImageGeometry(const RenderBoxModelObject&, const RenderLayerModelObject* paintContainer, const FillLayer&, const LayoutPoint& paintOffset, const LayoutRect& borderBoxRect, std::optional<FillBox> overrideOrigin = std::nullopt);
static void clipRoundedInnerRect(GraphicsContext&, const FloatRoundedRect& clipRect);
static bool boxShadowShouldBeAppliedToBackground(const RenderBoxModelObject&, const LayoutPoint& paintOffset, BleedAvoidance, const InlineIterator::InlineBoxIterator&);
private:
void paintRootBoxFillLayers() const;
static LayoutSize calculateFillTileSize(const RenderBoxModelObject&, const FillLayer&, const LayoutSize& positioningAreaSize);
const Document& document() const;
const RenderView& view() const;
RenderBoxModelObject& m_renderer;
const PaintInfo& m_paintInfo;
std::optional<FillBox> m_overrideClip;
std::optional<FillBox> m_overrideOrigin;
};
}
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