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
185
186
187
188
189
190
191
|
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
// Main header first:
#include "SVGMaskFrame.h"
// Keep others in (case-insensitive) order:
#include "AutoReferenceChainGuard.h"
#include "gfx2DGlue.h"
#include "gfxContext.h"
#include "mozilla/PresShell.h"
#include "mozilla/RefPtr.h"
#include "mozilla/SVGObserverUtils.h"
#include "mozilla/SVGUtils.h"
#include "mozilla/dom/SVGMaskElement.h"
#include "mozilla/dom/SVGUnitTypesBinding.h"
#include "mozilla/gfx/2D.h"
using namespace mozilla::dom;
using namespace mozilla::dom::SVGUnitTypes_Binding;
using namespace mozilla::gfx;
using namespace mozilla::image;
nsIFrame* NS_NewSVGMaskFrame(mozilla::PresShell* aPresShell,
mozilla::ComputedStyle* aStyle) {
return new (aPresShell)
mozilla::SVGMaskFrame(aStyle, aPresShell->GetPresContext());
}
namespace mozilla {
NS_IMPL_FRAMEARENA_HELPERS(SVGMaskFrame)
already_AddRefed<SourceSurface> SVGMaskFrame::GetMaskForMaskedFrame(
MaskParams& aParams) {
// Make sure we break reference loops and over long reference chains:
static int16_t sRefChainLengthCounter = AutoReferenceChainGuard::noChain;
AutoReferenceChainGuard refChainGuard(this, &mInUse, &sRefChainLengthCounter);
if (MOZ_UNLIKELY(!refChainGuard.Reference())) {
// Break reference chain
return nullptr;
}
gfxRect maskArea = GetMaskArea(aParams.maskedFrame);
if (maskArea.IsEmpty()) {
return nullptr;
}
gfxContext* context = aParams.ctx;
// Get the clip extents in device space:
// Minimizing the mask surface extents (using both the current clip extents
// and maskArea) is important for performance.
//
gfxRect maskSurfaceRectDouble = aParams.toUserSpace.TransformBounds(maskArea);
Rect maskSurfaceRect = ToRect(maskSurfaceRectDouble);
maskSurfaceRect.RoundOut();
StyleMaskType maskType;
if (aParams.maskMode == StyleMaskMode::MatchSource) {
maskType = StyleSVGReset()->mMaskType;
} else {
maskType = aParams.maskMode == StyleMaskMode::Luminance
? StyleMaskType::Luminance
: StyleMaskType::Alpha;
}
RefPtr<DrawTarget> maskDT;
if (maskType == StyleMaskType::Luminance) {
maskDT = context->GetDrawTarget()->CreateClippedDrawTarget(
maskSurfaceRect, SurfaceFormat::B8G8R8A8);
} else {
maskDT = context->GetDrawTarget()->CreateClippedDrawTarget(
maskSurfaceRect, SurfaceFormat::A8);
}
if (!maskDT || !maskDT->IsValid()) {
return nullptr;
}
RefPtr<gfxContext> tmpCtx =
gfxContext::CreatePreservingTransformOrNull(maskDT);
MOZ_ASSERT(tmpCtx); // already checked the draw target above
mMatrixForChildren =
GetMaskTransform(aParams.maskedFrame) * aParams.toUserSpace;
for (nsIFrame* kid = mFrames.FirstChild(); kid; kid = kid->GetNextSibling()) {
gfxMatrix m = mMatrixForChildren;
// The CTM of each frame referencing us can be different
ISVGDisplayableFrame* SVGFrame = do_QueryFrame(kid);
if (SVGFrame) {
SVGFrame->NotifySVGChanged(ISVGDisplayableFrame::TRANSFORM_CHANGED);
m = SVGUtils::GetTransformMatrixInUserSpace(kid) * m;
}
SVGUtils::PaintFrameWithEffects(kid, *tmpCtx, m, aParams.imgParams);
}
RefPtr<SourceSurface> surface;
if (maskType == StyleMaskType::Luminance) {
auto luminanceType = LuminanceType::LUMINANCE;
if (StyleSVG()->mColorInterpolation == StyleColorInterpolation::Linearrgb) {
luminanceType = LuminanceType::LINEARRGB;
}
RefPtr<SourceSurface> maskSnapshot =
maskDT->IntoLuminanceSource(luminanceType, aParams.opacity);
if (!maskSnapshot) {
return nullptr;
}
surface = std::move(maskSnapshot);
} else {
maskDT->FillRect(maskSurfaceRect,
ColorPattern(DeviceColor::MaskWhite(aParams.opacity)),
DrawOptions(1, CompositionOp::OP_IN));
RefPtr<SourceSurface> maskSnapshot = maskDT->Snapshot();
if (!maskSnapshot) {
return nullptr;
}
surface = std::move(maskSnapshot);
}
return surface.forget();
}
gfxRect SVGMaskFrame::GetMaskArea(nsIFrame* aMaskedFrame) {
SVGMaskElement* maskElem = static_cast<SVGMaskElement*>(GetContent());
uint16_t units =
maskElem->mEnumAttributes[SVGMaskElement::MASKUNITS].GetAnimValue();
gfxRect bbox;
if (units == SVG_UNIT_TYPE_OBJECTBOUNDINGBOX) {
bbox =
SVGUtils::GetBBox(aMaskedFrame, SVGUtils::eUseFrameBoundsForOuterSVG |
SVGUtils::eBBoxIncludeFillGeometry);
}
// Bounds in the user space of aMaskedFrame
gfxRect maskArea = SVGUtils::GetRelativeRect(
units, &maskElem->mLengthAttributes[SVGMaskElement::ATTR_X], bbox,
aMaskedFrame);
return maskArea;
}
nsresult SVGMaskFrame::AttributeChanged(int32_t aNameSpaceID,
nsAtom* aAttribute, int32_t aModType) {
if (aNameSpaceID == kNameSpaceID_None &&
(aAttribute == nsGkAtoms::x || aAttribute == nsGkAtoms::y ||
aAttribute == nsGkAtoms::width || aAttribute == nsGkAtoms::height ||
aAttribute == nsGkAtoms::maskUnits ||
aAttribute == nsGkAtoms::maskContentUnits)) {
SVGObserverUtils::InvalidateDirectRenderingObservers(this);
}
return SVGContainerFrame::AttributeChanged(aNameSpaceID, aAttribute,
aModType);
}
#ifdef DEBUG
void SVGMaskFrame::Init(nsIContent* aContent, nsContainerFrame* aParent,
nsIFrame* aPrevInFlow) {
NS_ASSERTION(aContent->IsSVGElement(nsGkAtoms::mask),
"Content is not an SVG mask");
SVGContainerFrame::Init(aContent, aParent, aPrevInFlow);
}
#endif /* DEBUG */
gfxMatrix SVGMaskFrame::GetCanvasTM() { return mMatrixForChildren; }
gfxMatrix SVGMaskFrame::GetMaskTransform(nsIFrame* aMaskedFrame) {
SVGMaskElement* content = static_cast<SVGMaskElement*>(GetContent());
SVGAnimatedEnumeration* maskContentUnits =
&content->mEnumAttributes[SVGMaskElement::MASKCONTENTUNITS];
uint32_t flags = SVGUtils::eBBoxIncludeFillGeometry |
(aMaskedFrame->StyleBorder()->mBoxDecorationBreak ==
StyleBoxDecorationBreak::Clone
? SVGUtils::eIncludeOnlyCurrentFrameForNonSVGElement
: 0);
return SVGUtils::AdjustMatrixForUnits(gfxMatrix(), maskContentUnits,
aMaskedFrame, flags);
}
} // namespace mozilla
|
