1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
|
/*
* Copyright (C) Research In Motion Limited 2009-2010. All rights reserved.
* Copyright (C) 2022 Apple 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.
*/
#include "config.h"
#include "RenderSVGResourceMasker.h"
#include "Element.h"
#include "ElementChildIteratorInlines.h"
#include "FloatPoint.h"
#include "Image.h"
#include "IntRect.h"
#include "RenderSVGResourceMaskerInlines.h"
#include "SVGRenderStyle.h"
#include "SVGRenderingContext.h"
#include <wtf/IsoMallocInlines.h>
namespace WebCore {
WTF_MAKE_ISO_ALLOCATED_IMPL(RenderSVGResourceMasker);
RenderSVGResourceMasker::RenderSVGResourceMasker(SVGMaskElement& element, RenderStyle&& style)
: RenderSVGResourceContainer(element, WTFMove(style))
{
}
RenderSVGResourceMasker::~RenderSVGResourceMasker() = default;
void RenderSVGResourceMasker::removeAllClientsFromCache(bool markForInvalidation)
{
m_maskContentBoundaries = FloatRect();
m_masker.clear();
markAllClientsForInvalidation(markForInvalidation ? LayoutAndBoundariesInvalidation : ParentOnlyInvalidation);
}
void RenderSVGResourceMasker::removeClientFromCache(RenderElement& client, bool markForInvalidation)
{
m_masker.remove(&client);
markClientForInvalidation(client, markForInvalidation ? BoundariesInvalidation : ParentOnlyInvalidation);
}
bool RenderSVGResourceMasker::applyResource(RenderElement& renderer, const RenderStyle&, GraphicsContext*& context, OptionSet<RenderSVGResourceMode> resourceMode)
{
ASSERT(context);
ASSERT_UNUSED(resourceMode, !resourceMode);
bool missingMaskerData = !m_masker.contains(&renderer);
if (missingMaskerData)
m_masker.set(&renderer, makeUnique<MaskerData>());
MaskerData* maskerData = m_masker.get(&renderer);
AffineTransform absoluteTransform = SVGRenderingContext::calculateTransformationToOutermostCoordinateSystem(renderer);
FloatRect repaintRect = renderer.repaintRectInLocalCoordinates();
// Ignore 2D rotation, as it doesn't affect the size of the mask.
FloatSize scale(absoluteTransform.xScale(), absoluteTransform.yScale());
// Determine scale factor for the mask. The size of intermediate ImageBuffers shouldn't be bigger than kMaxFilterSize.
ImageBuffer::sizeNeedsClamping(repaintRect.size(), scale);
if (!maskerData->maskImage && !repaintRect.isEmpty()) {
auto maskColorSpace = DestinationColorSpace::SRGB();
auto drawColorSpace = DestinationColorSpace::SRGB();
#if ENABLE(DESTINATION_COLOR_SPACE_LINEAR_SRGB)
const SVGRenderStyle& svgStyle = style().svgStyle();
if (svgStyle.colorInterpolation() == ColorInterpolation::LinearRGB) {
#if USE(CG)
maskColorSpace = DestinationColorSpace::LinearSRGB();
#endif
drawColorSpace = DestinationColorSpace::LinearSRGB();
}
#endif
// FIXME (149470): This image buffer should not be unconditionally unaccelerated. Making it match the context breaks alpha masking, though.
maskerData->maskImage = context->createScaledImageBuffer(repaintRect, scale, maskColorSpace, RenderingMode::Unaccelerated);
if (!maskerData->maskImage)
return false;
if (!drawContentIntoMaskImage(maskerData, drawColorSpace, &renderer))
maskerData->maskImage = nullptr;
}
if (!maskerData->maskImage)
return false;
SVGRenderingContext::clipToImageBuffer(*context, repaintRect, scale, maskerData->maskImage, missingMaskerData);
return true;
}
bool RenderSVGResourceMasker::drawContentIntoMaskImage(MaskerData* maskerData, const DestinationColorSpace& colorSpace, RenderObject* object)
{
GraphicsContext& maskImageContext = maskerData->maskImage->context();
// Eventually adjust the mask image context according to the target objectBoundingBox.
AffineTransform maskContentTransformation;
if (maskElement().maskContentUnits() == SVGUnitTypes::SVG_UNIT_TYPE_OBJECTBOUNDINGBOX) {
FloatRect objectBoundingBox = object->objectBoundingBox();
maskContentTransformation.translate(objectBoundingBox.location());
maskContentTransformation.scale(objectBoundingBox.size());
maskImageContext.concatCTM(maskContentTransformation);
}
// Draw the content into the ImageBuffer.
for (auto& child : childrenOfType<SVGElement>(maskElement())) {
auto renderer = child.renderer();
if (!renderer)
continue;
if (renderer->needsLayout())
return false;
const RenderStyle& style = renderer->style();
if (style.display() == DisplayType::None || style.visibility() != Visibility::Visible)
continue;
SVGRenderingContext::renderSubtreeToContext(maskImageContext, *renderer, maskContentTransformation);
}
#if !USE(CG)
maskerData->maskImage->transformToColorSpace(colorSpace);
#else
UNUSED_PARAM(colorSpace);
#endif
// Create the luminance mask.
if (style().svgStyle().maskType() == MaskType::Luminance)
maskerData->maskImage->convertToLuminanceMask();
return true;
}
void RenderSVGResourceMasker::calculateMaskContentRepaintRect()
{
for (Node* childNode = maskElement().firstChild(); childNode; childNode = childNode->nextSibling()) {
RenderObject* renderer = childNode->renderer();
if (!childNode->isSVGElement() || !renderer)
continue;
const RenderStyle& style = renderer->style();
if (style.display() == DisplayType::None || style.visibility() != Visibility::Visible)
continue;
m_maskContentBoundaries.unite(renderer->localToParentTransform().mapRect(renderer->repaintRectInLocalCoordinates()));
}
}
FloatRect RenderSVGResourceMasker::resourceBoundingBox(const RenderObject& object)
{
FloatRect objectBoundingBox = object.objectBoundingBox();
FloatRect maskBoundaries = SVGLengthContext::resolveRectangle<SVGMaskElement>(&maskElement(), maskElement().maskUnits(), objectBoundingBox);
// Resource was not layouted yet. Give back clipping rect of the mask.
if (selfNeedsLayout())
return maskBoundaries;
if (m_maskContentBoundaries.isEmpty())
calculateMaskContentRepaintRect();
FloatRect maskRect = m_maskContentBoundaries;
if (maskElement().maskContentUnits() == SVGUnitTypes::SVG_UNIT_TYPE_OBJECTBOUNDINGBOX) {
AffineTransform transform;
transform.translate(objectBoundingBox.location());
transform.scale(objectBoundingBox.size());
maskRect = transform.mapRect(maskRect);
}
maskRect.intersect(maskBoundaries);
return maskRect;
}
}
|
