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() {
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:
DummyRasterizer(SkReadBuffer &)39 DummyRasterizer(SkReadBuffer&) {}
40
41 static int gCount;
42
43 typedef SkRasterizer INHERITED;
44 };
45
46 int DummyRasterizer::gCount;
47
48 // Check to make sure that the SkPaint in the layer has its destructor called.
DEF_TEST(LayerRasterizer_destructor,reporter)49 DEF_TEST(LayerRasterizer_destructor, reporter) {
50 {
51 SkPaint paint;
52 paint.setRasterizer(SkNEW(DummyRasterizer))->unref();
53 REPORTER_ASSERT(reporter, DummyRasterizer::GetCount() == 1);
54
55 SkLayerRasterizer::Builder builder;
56 builder.addLayer(paint);
57 }
58 REPORTER_ASSERT(reporter, DummyRasterizer::GetCount() == 0);
59 }
60
61 class LayerRasterizerTester {
62 public:
CountLayers(const SkLayerRasterizer & layerRasterizer)63 static int CountLayers(const SkLayerRasterizer& layerRasterizer) {
64 return layerRasterizer.fLayers->count();
65 }
66
GetLayers(const SkLayerRasterizer & layerRasterizer)67 static const SkDeque& GetLayers(const SkLayerRasterizer& layerRasterizer) {
68 return *layerRasterizer.fLayers;
69 }
70 };
71
72 // MUST stay in sync with definition of SkLayerRasterizer_Rec in SkLayerRasterizer.cpp.
73 struct SkLayerRasterizer_Rec {
74 SkPaint fPaint;
75 SkVector fOffset;
76 };
77
equals(const SkLayerRasterizer_Rec & rec1,const SkLayerRasterizer_Rec & rec2)78 static bool equals(const SkLayerRasterizer_Rec& rec1, const SkLayerRasterizer_Rec& rec2) {
79 return rec1.fPaint == rec2.fPaint && rec1.fOffset == rec2.fOffset;
80 }
81
DEF_TEST(LayerRasterizer_copy,reporter)82 DEF_TEST(LayerRasterizer_copy, reporter) {
83 SkLayerRasterizer::Builder builder;
84 REPORTER_ASSERT(reporter, NULL == builder.snapshotRasterizer());
85 SkPaint paint;
86 // Create a bunch of paints with different flags.
87 for (uint32_t flags = 0x01; flags < SkPaint::kAllFlags; flags <<= 1) {
88 paint.setFlags(flags);
89 builder.addLayer(paint, static_cast<SkScalar>(flags), static_cast<SkScalar>(flags));
90 }
91
92 // Create a layer rasterizer with all the existing layers.
93 SkAutoTUnref<SkLayerRasterizer> firstCopy(builder.snapshotRasterizer());
94
95 // Add one more layer.
96 paint.setFlags(SkPaint::kAllFlags);
97 builder.addLayer(paint);
98
99 SkAutoTUnref<SkLayerRasterizer> oneLarger(builder.snapshotRasterizer());
100 SkAutoTUnref<SkLayerRasterizer> detached(builder.detachRasterizer());
101
102 // Check the counts for consistency.
103 const int largerCount = LayerRasterizerTester::CountLayers(*oneLarger.get());
104 const int smallerCount = LayerRasterizerTester::CountLayers(*firstCopy.get());
105 REPORTER_ASSERT(reporter, largerCount == LayerRasterizerTester::CountLayers(*detached.get()));
106 REPORTER_ASSERT(reporter, smallerCount == largerCount - 1);
107
108 const SkLayerRasterizer_Rec* recFirstCopy = NULL;
109 const SkLayerRasterizer_Rec* recOneLarger = NULL;
110 const SkLayerRasterizer_Rec* recDetached = NULL;
111
112 const SkDeque& layersFirstCopy = LayerRasterizerTester::GetLayers(*firstCopy.get());
113 const SkDeque& layersOneLarger = LayerRasterizerTester::GetLayers(*oneLarger.get());
114 const SkDeque& layersDetached = LayerRasterizerTester::GetLayers(*detached.get());
115
116 // Ensure that our version of SkLayerRasterizer_Rec is the same as the one in
117 // SkLayerRasterizer.cpp - or at least the same size. If the order were switched, we
118 // would fail the test elsewhere.
119 REPORTER_ASSERT(reporter, layersFirstCopy.elemSize() == sizeof(SkLayerRasterizer_Rec));
120 REPORTER_ASSERT(reporter, layersOneLarger.elemSize() == sizeof(SkLayerRasterizer_Rec));
121 REPORTER_ASSERT(reporter, layersDetached.elemSize() == sizeof(SkLayerRasterizer_Rec));
122
123 SkDeque::F2BIter iterFirstCopy(layersFirstCopy);
124 SkDeque::F2BIter iterOneLarger(layersOneLarger);
125 SkDeque::F2BIter iterDetached(layersDetached);
126
127 for (int i = 0; i < largerCount; ++i) {
128 recFirstCopy = static_cast<const SkLayerRasterizer_Rec*>(iterFirstCopy.next());
129 recOneLarger = static_cast<const SkLayerRasterizer_Rec*>(iterOneLarger.next());
130 recDetached = static_cast<const SkLayerRasterizer_Rec*>(iterDetached.next());
131
132 REPORTER_ASSERT(reporter, equals(*recOneLarger, *recDetached));
133 if (smallerCount == i) {
134 REPORTER_ASSERT(reporter, recFirstCopy == NULL);
135 } else {
136 REPORTER_ASSERT(reporter, equals(*recFirstCopy, *recOneLarger));
137 }
138 }
139 }
140
DEF_TEST(LayerRasterizer_detachEmpty,reporter)141 DEF_TEST(LayerRasterizer_detachEmpty, reporter) {
142 SkLayerRasterizer::Builder builder;
143 REPORTER_ASSERT(reporter, NULL == builder.detachRasterizer());
144 }
145