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/**
* Copyright (C) 2007 Rob Buis <buis@kde.org>
* Copyright (C) 2007 Nikolas Zimmermann <zimmermann@kde.org>
* Copyright (C) 2007 Eric Seidel <eric@webkit.org>
* Copyright (C) 2009 Google, Inc. All rights reserved.
* Copyright (C) Research In Motion Limited 2010. All rights reserved.
* Copyright (C) 2012 Zoltan Herczeg <zherczeg@webkit.org>.
*
* 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 THIRD_PARTY_BLINK_RENDERER_CORE_PAINT_SVG_PAINT_CONTEXT_H_
#define THIRD_PARTY_BLINK_RENDERER_CORE_PAINT_SVG_PAINT_CONTEXT_H_
#include <memory>
#include "third_party/blink/renderer/core/layout/svg/layout_svg_resource_paint_server.h"
#include "third_party/blink/renderer/core/paint/clip_path_clipper.h"
#include "third_party/blink/renderer/core/paint/object_paint_properties.h"
#include "third_party/blink/renderer/core/paint/paint_info.h"
#include "third_party/blink/renderer/core/paint/svg_filter_painter.h"
#include "third_party/blink/renderer/platform/graphics/paint/scoped_paint_chunk_properties.h"
#include "third_party/blink/renderer/platform/transforms/affine_transform.h"
namespace blink {
class LayoutObject;
class LayoutSVGResourceFilter;
class LayoutSVGResourceMasker;
class SVGResources;
// Hooks up the correct paint property transform node.
class SVGTransformContext {
STACK_ALLOCATED();
public:
SVGTransformContext(const PaintInfo& paint_info,
const LayoutObject& object,
const AffineTransform& transform) {
DCHECK(object.IsSVGChild());
const auto* fragment = paint_info.FragmentToPaint(object);
if (!fragment)
return;
const auto* properties = fragment->PaintProperties();
if (!properties)
return;
if (const auto* transform_node = properties->Transform()) {
DCHECK(transform_node->Matrix() == transform.ToTransformationMatrix());
transform_property_scope_.emplace(
paint_info.context.GetPaintController(), transform_node, object,
DisplayItem::PaintPhaseToSVGTransformType(paint_info.phase));
}
}
private:
base::Optional<ScopedPaintChunkProperties> transform_property_scope_;
};
class SVGPaintContext {
STACK_ALLOCATED();
public:
SVGPaintContext(const LayoutObject& object, const PaintInfo& paint_info)
: object_(object),
paint_info_(paint_info),
filter_(nullptr),
masker_(nullptr) {}
~SVGPaintContext();
PaintInfo& GetPaintInfo() {
return filter_paint_info_ ? *filter_paint_info_ : paint_info_;
}
// Return true if these operations aren't necessary or if they are
// successfully applied.
bool ApplyClipMaskAndFilterIfNecessary();
static void PaintResourceSubtree(GraphicsContext&, const LayoutObject*);
// TODO(fs): This functions feels a bit misplaced (we don't want this to
// turn into the new kitchen sink). Move it if a better location surfaces.
static bool PaintForLayoutObject(
const PaintInfo&,
const ComputedStyle&,
const LayoutObject&,
LayoutSVGResourceMode,
PaintFlags&,
const AffineTransform* additional_paint_server_transform = nullptr);
private:
void ApplyPaintPropertyState();
void ApplyClipIfNecessary();
// Return true if no masking is necessary or if the mask is successfully
// applied.
bool ApplyMaskIfNecessary(SVGResources*);
// Return true if no filtering is necessary or if the filter is successfully
// applied.
bool ApplyFilterIfNecessary(SVGResources*);
const LayoutObject& object_;
PaintInfo paint_info_;
std::unique_ptr<PaintInfo> filter_paint_info_;
LayoutSVGResourceFilter* filter_;
LayoutSVGResourceMasker* masker_;
base::Optional<ClipPathClipper> clip_path_clipper_;
std::unique_ptr<SVGFilterRecordingContext> filter_recording_context_;
base::Optional<ScopedPaintChunkProperties> scoped_paint_chunk_properties_;
#if DCHECK_IS_ON()
bool apply_clip_mask_and_filter_if_necessary_called_ = false;
#endif
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_CORE_PAINT_SVG_PAINT_CONTEXT_H_
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