1 /*
2 * Copyright 2014 Google Inc.
3 *
4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file.
6 */
7
8 #include "SkDeque.h"
9 #include "SkLayerRasterizer.h"
10 #include "SkPaint.h"
11 #include "SkRasterizer.h"
12 #include "Test.h"
13
14 class SkReadBuffer;
15
16 // Dummy class to place on a paint just to ensure the paint's destructor
17 // is called.
18 // ONLY to be used by LayerRasterizer_destructor, since other tests may
19 // be run in a separate thread, and this class is not threadsafe.
20 class DummyRasterizer : public SkRasterizer {
21 public:
DummyRasterizer()22 DummyRasterizer()
23 : INHERITED()
24 {
25 // Not threadsafe. Only used in one thread.
26 gCount++;
27 }
28
~DummyRasterizer()29 ~DummyRasterizer() override {
30 // Not threadsafe. Only used in one thread.
31 gCount--;
32 }
33
GetCount()34 static int GetCount() { return gCount; }
35
36 SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(DummyRasterizer)
37
38 private:
39 static int gCount;
40
41 typedef SkRasterizer INHERITED;
42 };
43
44 int DummyRasterizer::gCount;
45
CreateProc(SkReadBuffer &)46 sk_sp<SkFlattenable> DummyRasterizer::CreateProc(SkReadBuffer&) {
47 return sk_make_sp<DummyRasterizer>();
48 }
49
50 // Check to make sure that the SkPaint in the layer has its destructor called.
DEF_TEST(LayerRasterizer_destructor,reporter)51 DEF_TEST(LayerRasterizer_destructor, reporter) {
52 {
53 SkPaint paint;
54 paint.setRasterizer(sk_make_sp<DummyRasterizer>());
55 REPORTER_ASSERT(reporter, DummyRasterizer::GetCount() == 1);
56
57 SkLayerRasterizer::Builder builder;
58 builder.addLayer(paint);
59 }
60 REPORTER_ASSERT(reporter, DummyRasterizer::GetCount() == 0);
61 }
62
63 class LayerRasterizerTester {
64 public:
CountLayers(const SkLayerRasterizer & layerRasterizer)65 static int CountLayers(const SkLayerRasterizer& layerRasterizer) {
66 return layerRasterizer.fLayers->count();
67 }
68
GetLayers(const SkLayerRasterizer & layerRasterizer)69 static const SkDeque& GetLayers(const SkLayerRasterizer& layerRasterizer) {
70 return *layerRasterizer.fLayers;
71 }
72 };
73
74 // MUST stay in sync with definition of SkLayerRasterizer_Rec in SkLayerRasterizer.cpp.
75 struct SkLayerRasterizer_Rec {
76 SkPaint fPaint;
77 SkVector fOffset;
78 };
79
equals(const SkLayerRasterizer_Rec & rec1,const SkLayerRasterizer_Rec & rec2)80 static bool equals(const SkLayerRasterizer_Rec& rec1, const SkLayerRasterizer_Rec& rec2) {
81 return rec1.fPaint == rec2.fPaint && rec1.fOffset == rec2.fOffset;
82 }
83
DEF_TEST(LayerRasterizer_copy,reporter)84 DEF_TEST(LayerRasterizer_copy, reporter) {
85 SkLayerRasterizer::Builder builder;
86 REPORTER_ASSERT(reporter, nullptr == builder.snapshot());
87 SkPaint paint;
88 // Create a bunch of paints with different flags.
89 for (uint32_t flags = 0x01; flags < SkPaint::kAllFlags; flags <<= 1) {
90 paint.setFlags(flags);
91 builder.addLayer(paint, static_cast<SkScalar>(flags), static_cast<SkScalar>(flags));
92 }
93
94 // Create a layer rasterizer with all the existing layers.
95 sk_sp<SkLayerRasterizer> firstCopy(builder.snapshot());
96
97 // Add one more layer.
98 paint.setFlags(SkPaint::kAllFlags);
99 builder.addLayer(paint);
100
101 sk_sp<SkLayerRasterizer> oneLarger(builder.snapshot());
102 sk_sp<SkLayerRasterizer> detached(builder.detach());
103
104 // Check the counts for consistency.
105 const int largerCount = LayerRasterizerTester::CountLayers(*oneLarger.get());
106 const int smallerCount = LayerRasterizerTester::CountLayers(*firstCopy.get());
107 REPORTER_ASSERT(reporter, largerCount == LayerRasterizerTester::CountLayers(*detached.get()));
108 REPORTER_ASSERT(reporter, smallerCount == largerCount - 1);
109
110 const SkLayerRasterizer_Rec* recFirstCopy = nullptr;
111 const SkLayerRasterizer_Rec* recOneLarger = nullptr;
112 const SkLayerRasterizer_Rec* recDetached = nullptr;
113
114 const SkDeque& layersFirstCopy = LayerRasterizerTester::GetLayers(*firstCopy.get());
115 const SkDeque& layersOneLarger = LayerRasterizerTester::GetLayers(*oneLarger.get());
116 const SkDeque& layersDetached = LayerRasterizerTester::GetLayers(*detached.get());
117
118 // Ensure that our version of SkLayerRasterizer_Rec is the same as the one in
119 // SkLayerRasterizer.cpp - or at least the same size. If the order were switched, we
120 // would fail the test elsewhere.
121 REPORTER_ASSERT(reporter, layersFirstCopy.elemSize() == sizeof(SkLayerRasterizer_Rec));
122 REPORTER_ASSERT(reporter, layersOneLarger.elemSize() == sizeof(SkLayerRasterizer_Rec));
123 REPORTER_ASSERT(reporter, layersDetached.elemSize() == sizeof(SkLayerRasterizer_Rec));
124
125 SkDeque::F2BIter iterFirstCopy(layersFirstCopy);
126 SkDeque::F2BIter iterOneLarger(layersOneLarger);
127 SkDeque::F2BIter iterDetached(layersDetached);
128
129 for (int i = 0; i < largerCount; ++i) {
130 recFirstCopy = static_cast<const SkLayerRasterizer_Rec*>(iterFirstCopy.next());
131 recOneLarger = static_cast<const SkLayerRasterizer_Rec*>(iterOneLarger.next());
132 recDetached = static_cast<const SkLayerRasterizer_Rec*>(iterDetached.next());
133
134 REPORTER_ASSERT(reporter, equals(*recOneLarger, *recDetached));
135 if (smallerCount == i) {
136 REPORTER_ASSERT(reporter, recFirstCopy == nullptr);
137 } else {
138 REPORTER_ASSERT(reporter, equals(*recFirstCopy, *recOneLarger));
139 }
140 }
141 }
142
DEF_TEST(LayerRasterizer_detachEmpty,reporter)143 DEF_TEST(LayerRasterizer_detachEmpty, reporter) {
144 SkLayerRasterizer::Builder builder;
145 REPORTER_ASSERT(reporter, nullptr == builder.detach());
146 }
147