1 /*
2 * Copyright 2019 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 "include/core/SkTypes.h"
9 #include "src/core/SkDescriptor.h"
10 #include "src/core/SkScalerContext.h"
11 #include "tests/Test.h"
12
13 #include <memory>
14
15 class SkDescriptorTestHelper {
16 public:
SetLength(SkDescriptor * desc,size_t length)17 static void SetLength(SkDescriptor* desc, size_t length) { desc->fLength = length; }
18 };
19
DEF_TEST(Descriptor_empty,r)20 DEF_TEST(Descriptor_empty, r) {
21 const size_t size = sizeof(SkDescriptor);
22
23 auto desc = SkDescriptor::Alloc(size);
24 desc->init();
25 REPORTER_ASSERT(r, desc->isValid());
26 REPORTER_ASSERT(r, desc->getLength() == size);
27 }
28
DEF_TEST(Descriptor_valid_simple,r)29 DEF_TEST(Descriptor_valid_simple, r) {
30 const size_t size =
31 sizeof(SkDescriptor) + sizeof(SkDescriptor::Entry) + sizeof(SkScalerContextRec);
32
33 auto desc = SkDescriptor::Alloc(size);
34 desc->init();
35 SkScalerContextRec rec;
36 desc->addEntry(kRec_SkDescriptorTag, sizeof(rec), &rec);
37 REPORTER_ASSERT(r, desc->isValid());
38 REPORTER_ASSERT(r, desc->getLength() == size);
39
40 SkDescriptorTestHelper::SetLength(desc.get(), size - 4);
41 REPORTER_ASSERT(r, !desc->isValid());
42 }
43
DEF_TEST(Descriptor_valid_simple_extra_space,r)44 DEF_TEST(Descriptor_valid_simple_extra_space, r) {
45 const size_t extra_space = 100;
46 const size_t size =
47 sizeof(SkDescriptor) + sizeof(SkDescriptor::Entry) + sizeof(SkScalerContextRec);
48
49 auto desc = SkDescriptor::Alloc(size + extra_space);
50 desc->init();
51 SkScalerContextRec rec;
52 desc->addEntry(kRec_SkDescriptorTag, sizeof(rec), &rec);
53 REPORTER_ASSERT(r, desc->isValid());
54 REPORTER_ASSERT(r, desc->getLength() == size);
55
56 SkDescriptorTestHelper::SetLength(desc.get(), size - 4);
57 REPORTER_ASSERT(r, !desc->isValid());
58 }
59
DEF_TEST(Descriptor_valid_more_tags,r)60 DEF_TEST(Descriptor_valid_more_tags, r) {
61 const size_t effectSize = 16;
62 const size_t testSize = 32;
63 const size_t size = sizeof(SkDescriptor) + 3 * sizeof(SkDescriptor::Entry) +
64 sizeof(SkScalerContextRec) + effectSize + testSize;
65
66 auto desc = SkDescriptor::Alloc(size);
67 desc->init();
68 SkScalerContextRec rec;
69 desc->addEntry(kRec_SkDescriptorTag, sizeof(rec), &rec);
70 desc->addEntry(kEffects_SkDescriptorTag, effectSize, nullptr);
71 desc->addEntry(SkSetFourByteTag('t', 'e', 's', 't'), testSize, nullptr);
72 REPORTER_ASSERT(r, desc->isValid());
73 REPORTER_ASSERT(r, desc->getLength() == size);
74
75 SkDescriptorTestHelper::SetLength(desc.get(), size - 4);
76 REPORTER_ASSERT(r, !desc->isValid());
77 }
78
DEF_TEST(Descriptor_invalid_rec_size,r)79 DEF_TEST(Descriptor_invalid_rec_size, r) {
80 const size_t size =
81 sizeof(SkDescriptor) + sizeof(SkDescriptor::Entry) + sizeof(SkScalerContextRec) - 4;
82
83 auto desc = SkDescriptor::Alloc(size);
84 desc->init();
85 SkScalerContextRec rec;
86 desc->addEntry(kRec_SkDescriptorTag, sizeof(rec) - 4, &rec);
87 REPORTER_ASSERT(r, desc->getLength() == size);
88 REPORTER_ASSERT(r, !desc->isValid());
89 }
90
DEF_TEST(Descriptor_invalid_length,r)91 DEF_TEST(Descriptor_invalid_length, r) {
92 const size_t size = sizeof(SkDescriptor) + sizeof(SkDescriptor::Entry);
93 const size_t effect_size = 1000;
94
95 auto desc = SkDescriptor::Alloc(size);
96 desc->init();
97 SkScalerContextRec rec;
98 desc->addEntry(kEffects_SkDescriptorTag, effect_size, nullptr);
99
100 SkDescriptorTestHelper::SetLength(desc.get(), size);
101 REPORTER_ASSERT(r, !desc->isValid());
102
103 SkDescriptorTestHelper::SetLength(desc.get(), size + effect_size);
104 REPORTER_ASSERT(r, desc->isValid());
105 }
106