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
|
/*
* Copyright 2014 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "GrGpu.h"
#include "GrPathRendering.h"
#include "SkDescriptor.h"
#include "SkGlyph.h"
#include "SkMatrix.h"
#include "SkTypeface.h"
#include "GrPathRange.h"
const GrUserStencilSettings& GrPathRendering::GetStencilPassSettings(FillType fill) {
switch (fill) {
default:
SK_ABORT("Unexpected path fill.");
case GrPathRendering::kWinding_FillType: {
constexpr static GrUserStencilSettings kWindingStencilPass(
GrUserStencilSettings::StaticInit<
0xffff,
GrUserStencilTest::kAlwaysIfInClip,
0xffff,
GrUserStencilOp::kIncWrap,
GrUserStencilOp::kIncWrap,
0xffff>()
);
return kWindingStencilPass;
}
case GrPathRendering::kEvenOdd_FillType: {
constexpr static GrUserStencilSettings kEvenOddStencilPass(
GrUserStencilSettings::StaticInit<
0xffff,
GrUserStencilTest::kAlwaysIfInClip,
0xffff,
GrUserStencilOp::kInvert,
GrUserStencilOp::kInvert,
0xffff>()
);
return kEvenOddStencilPass;
}
}
}
class GlyphGenerator : public GrPathRange::PathGenerator {
public:
GlyphGenerator(const SkTypeface& typeface, const SkScalerContextEffects& effects,
const SkDescriptor& desc)
: fScalerContext(typeface.createScalerContext(effects, &desc))
#ifdef SK_DEBUG
, fDesc(desc.copy())
#endif
{}
int getNumPaths() override {
return fScalerContext->getGlyphCount();
}
void generatePath(int glyphID, SkPath* out) override {
fScalerContext->getPath(glyphID, out);
}
#ifdef SK_DEBUG
bool isEqualTo(const SkDescriptor& desc) const override { return *fDesc == desc; }
#endif
private:
const std::unique_ptr<SkScalerContext> fScalerContext;
#ifdef SK_DEBUG
const std::unique_ptr<SkDescriptor> fDesc;
#endif
};
sk_sp<GrPathRange> GrPathRendering::createGlyphs(const SkTypeface* typeface,
const SkScalerContextEffects& effects,
const SkDescriptor* desc,
const GrStyle& style) {
if (nullptr == typeface) {
typeface = SkTypeface::GetDefaultTypeface();
SkASSERT(nullptr != typeface);
}
if (desc) {
sk_sp<GlyphGenerator> generator(new GlyphGenerator(*typeface, effects, *desc));
return this->createPathRange(generator.get(), style);
}
SkScalerContextRec rec;
memset(&rec, 0, sizeof(rec));
rec.fFontID = typeface->uniqueID();
rec.fTextSize = SkPaint::kCanonicalTextSizeForPaths;
rec.fPreScaleX = rec.fPost2x2[0][0] = rec.fPost2x2[1][1] = SK_Scalar1;
// Don't bake stroke information into the glyphs, we'll let the GPU do the stroking.
SkAutoDescriptor ad(sizeof(rec) + SkDescriptor::ComputeOverhead(1));
SkDescriptor* genericDesc = ad.getDesc();
genericDesc->init();
genericDesc->addEntry(kRec_SkDescriptorTag, sizeof(rec), &rec);
genericDesc->computeChecksum();
// No effects, so we make a dummy struct
SkScalerContextEffects noEffects;
sk_sp<GlyphGenerator> generator(new GlyphGenerator(*typeface, noEffects, *genericDesc));
return this->createPathRange(generator.get(), style);
}
void GrPathRendering::stencilPath(const StencilPathArgs& args, const GrPath* path) {
fGpu->handleDirtyContext();
this->onStencilPath(args, path);
}
void GrPathRendering::drawPath(const GrPipeline& pipeline,
const GrPrimitiveProcessor& primProc,
// Cover pass settings in pipeline.
const GrStencilSettings& stencilPassSettings,
const GrPath* path) {
fGpu->handleDirtyContext();
if (GrXferBarrierType barrierType = pipeline.xferBarrierType(*fGpu->caps())) {
fGpu->xferBarrier(pipeline.renderTarget(), barrierType);
}
this->onDrawPath(pipeline, primProc, stencilPassSettings, path);
}
void GrPathRendering::drawPaths(const GrPipeline& pipeline,
const GrPrimitiveProcessor& primProc,
// Cover pass settings in pipeline.
const GrStencilSettings& stencilPassSettings,
const GrPathRange* pathRange,
const void* indices,
PathIndexType indexType,
const float transformValues[],
PathTransformType transformType,
int count) {
fGpu->handleDirtyContext();
if (GrXferBarrierType barrierType = pipeline.xferBarrierType(*fGpu->caps())) {
fGpu->xferBarrier(pipeline.renderTarget(), barrierType);
}
#ifdef SK_DEBUG
pathRange->assertPathsLoaded(indices, indexType, count);
#endif
this->onDrawPaths(pipeline, primProc, stencilPassSettings, pathRange, indices, indexType,
transformValues, transformType, count);
}
|
