1 /*
2 * Copyright 2011 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/utils/SkRandom.h"
9 #include "src/core/SkAutoMalloc.h"
10 #include "src/core/SkReadBuffer.h"
11 #include "src/core/SkWriter32.h"
12 #include "tests/Test.h"
13
check_contents(skiatest::Reporter * reporter,const SkWriter32 & writer,const void * expected,size_t size)14 static void check_contents(skiatest::Reporter* reporter, const SkWriter32& writer,
15 const void* expected, size_t size) {
16 SkAutoSMalloc<256> storage(size);
17 REPORTER_ASSERT(reporter, writer.bytesWritten() == size);
18 writer.flatten(storage.get());
19 REPORTER_ASSERT(reporter, !memcmp(storage.get(), expected, size));
20 }
21
22
test_reserve(skiatest::Reporter * reporter)23 static void test_reserve(skiatest::Reporter* reporter) {
24 // There used to be a bug where we'd assert your first reservation had to
25 // fit in external storage if you used it. This would crash in debug mode.
26 uint8_t storage[4];
27 SkWriter32 writer(storage, sizeof(storage));
28 writer.reserve(40);
29 }
30
test_string_null(skiatest::Reporter * reporter)31 static void test_string_null(skiatest::Reporter* reporter) {
32 uint8_t storage[8];
33 SkWriter32 writer(storage, sizeof(storage));
34
35 // Can we write nullptr?
36 writer.writeString(nullptr);
37 const int32_t expected[] = { 0x0, 0x0 };
38 check_contents(reporter, writer, expected, sizeof(expected));
39 }
40
test_rewind(skiatest::Reporter * reporter)41 static void test_rewind(skiatest::Reporter* reporter) {
42 SkSWriter32<32> writer;
43 int32_t array[3] = { 1, 2, 4 };
44
45 REPORTER_ASSERT(reporter, 0 == writer.bytesWritten());
46 for (size_t i = 0; i < SK_ARRAY_COUNT(array); ++i) {
47 writer.writeInt(array[i]);
48 }
49 check_contents(reporter, writer, array, sizeof(array));
50
51 writer.rewindToOffset(2*sizeof(int32_t));
52 REPORTER_ASSERT(reporter, sizeof(array) - 4 == writer.bytesWritten());
53 writer.writeInt(3);
54 REPORTER_ASSERT(reporter, sizeof(array) == writer.bytesWritten());
55 array[2] = 3;
56 check_contents(reporter, writer, array, sizeof(array));
57
58 // test rewinding past allocated chunks. This used to crash because we
59 // didn't truncate our link-list after freeing trailing blocks
60 {
61 SkWriter32 writer;
62 for (int i = 0; i < 100; ++i) {
63 writer.writeInt(i);
64 }
65 REPORTER_ASSERT(reporter, 100*4 == writer.bytesWritten());
66 for (int j = 100*4; j >= 0; j -= 16) {
67 writer.rewindToOffset(j);
68 }
69 REPORTER_ASSERT(reporter, writer.bytesWritten() < 16);
70 }
71 }
72
test1(skiatest::Reporter * reporter,SkWriter32 * writer)73 static void test1(skiatest::Reporter* reporter, SkWriter32* writer) {
74 const uint32_t data[] = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 };
75 for (size_t i = 0; i < SK_ARRAY_COUNT(data); ++i) {
76 REPORTER_ASSERT(reporter, i*4 == writer->bytesWritten());
77 writer->write32(data[i]);
78 REPORTER_ASSERT(reporter, data[i] == writer->readTAt<uint32_t>(i * 4));
79 }
80
81 char buffer[sizeof(data)];
82 REPORTER_ASSERT(reporter, sizeof(buffer) == writer->bytesWritten());
83 writer->flatten(buffer);
84 REPORTER_ASSERT(reporter, !memcmp(data, buffer, sizeof(buffer)));
85 }
86
testWritePad(skiatest::Reporter * reporter,SkWriter32 * writer)87 static void testWritePad(skiatest::Reporter* reporter, SkWriter32* writer) {
88 // Create some random data to write.
89 const size_t dataSize = 10;
90
91 SkAutoTMalloc<uint32_t> originalData(dataSize);
92 {
93 SkRandom rand(0);
94 for (size_t i = 0; i < dataSize; i++) {
95 originalData[(int) i] = rand.nextU();
96 }
97
98 // Write the random data to the writer at different lengths for
99 // different alignments.
100 for (size_t len = 0; len < dataSize; len++) {
101 writer->writePad(originalData.get(), len);
102 }
103 }
104
105 size_t totalBytes = writer->bytesWritten();
106
107 SkAutoMalloc readStorage(totalBytes);
108 writer->flatten(readStorage.get());
109
110 SkReadBuffer reader(readStorage.get(), totalBytes);
111
112 for (size_t len = 0; len < dataSize; len++) {
113 const char* readPtr = static_cast<const char*>(reader.skip(len));
114 // Ensure that the data read is the same as what was written.
115 REPORTER_ASSERT(reporter, memcmp(readPtr, originalData.get(), len) == 0);
116 // Ensure that the rest is padded with zeroes.
117 const char* stop = readPtr + SkAlign4(len);
118 readPtr += len;
119 while (readPtr < stop) {
120 REPORTER_ASSERT(reporter, *readPtr++ == 0);
121 }
122 }
123 }
124
testOverwriteT(skiatest::Reporter * reporter,SkWriter32 * writer)125 static void testOverwriteT(skiatest::Reporter* reporter, SkWriter32* writer) {
126 const size_t padding = 64;
127
128 const uint32_t uint1 = 0x12345678;
129 const uint32_t uint2 = 0x98765432;
130 const SkScalar scalar1 = 1234.5678f;
131 const SkScalar scalar2 = 9876.5432f;
132 const SkRect rect1 = SkRect::MakeXYWH(1, 2, 3, 4);
133 const SkRect rect2 = SkRect::MakeXYWH(5, 6, 7, 8);
134
135 for (size_t i = 0; i < (padding / 4); ++i) {
136 writer->write32(0);
137 }
138
139 writer->write32(uint1);
140 writer->writeRect(rect1);
141 writer->writeScalar(scalar1);
142
143 for (size_t i = 0; i < (padding / 4); ++i) {
144 writer->write32(0);
145 }
146
147 REPORTER_ASSERT(reporter, writer->readTAt<uint32_t>(padding) == uint1);
148 REPORTER_ASSERT(reporter, writer->readTAt<SkRect>(padding + sizeof(uint32_t)) == rect1);
149 REPORTER_ASSERT(reporter, writer->readTAt<SkScalar>(
150 padding + sizeof(uint32_t) + sizeof(SkRect)) == scalar1);
151
152 writer->overwriteTAt(padding, uint2);
153 writer->overwriteTAt(padding + sizeof(uint32_t), rect2);
154 writer->overwriteTAt(padding + sizeof(uint32_t) + sizeof(SkRect), scalar2);
155
156 REPORTER_ASSERT(reporter, writer->readTAt<uint32_t>(padding) == uint2);
157 REPORTER_ASSERT(reporter, writer->readTAt<SkRect>(padding + sizeof(uint32_t)) == rect2);
158 REPORTER_ASSERT(reporter, writer->readTAt<SkScalar>(
159 padding + sizeof(uint32_t) + sizeof(SkRect)) == scalar2);
160 }
161
DEF_TEST(Writer32_dynamic,reporter)162 DEF_TEST(Writer32_dynamic, reporter) {
163 SkWriter32 writer;
164 test1(reporter, &writer);
165
166 writer.reset();
167 testWritePad(reporter, &writer);
168
169 writer.reset();
170 testOverwriteT(reporter, &writer);
171 }
172
DEF_TEST(Writer32_small,reporter)173 DEF_TEST(Writer32_small, reporter) {
174 SkSWriter32<8 * sizeof(intptr_t)> writer;
175 test1(reporter, &writer);
176
177 writer.reset(); // should just rewind our storage
178 testWritePad(reporter, &writer);
179
180 writer.reset();
181 testOverwriteT(reporter, &writer);
182 }
183
DEF_TEST(Writer32_large,reporter)184 DEF_TEST(Writer32_large, reporter) {
185 SkSWriter32<1024 * sizeof(intptr_t)> writer;
186 test1(reporter, &writer);
187
188 writer.reset(); // should just rewind our storage
189 testWritePad(reporter, &writer);
190
191 writer.reset();
192 testOverwriteT(reporter, &writer);
193 }
194
DEF_TEST(Writer32_misc,reporter)195 DEF_TEST(Writer32_misc, reporter) {
196 test_reserve(reporter);
197 test_string_null(reporter);
198 test_rewind(reporter);
199 }
200
DEF_TEST(Writer32_data,reporter)201 DEF_TEST(Writer32_data, reporter) {
202 const char* str = "0123456789";
203 sk_sp<SkData> data0(SkData::MakeWithCString(str));
204 sk_sp<SkData> data1(SkData::MakeEmpty());
205
206 const size_t sizes[] = {
207 SkWriter32::WriteDataSize(nullptr),
208 SkWriter32::WriteDataSize(data0.get()),
209 SkWriter32::WriteDataSize(data1.get()),
210 };
211
212 SkSWriter32<1000> writer;
213 size_t sizeWritten = 0;
214
215 writer.writeData(nullptr);
216 sizeWritten += sizes[0];
217 REPORTER_ASSERT(reporter, sizeWritten == writer.bytesWritten());
218
219 writer.writeData(data0.get());
220 sizeWritten += sizes[1];
221 REPORTER_ASSERT(reporter, sizeWritten == writer.bytesWritten());
222
223 writer.writeData(data1.get());
224 sizeWritten += sizes[2];
225 REPORTER_ASSERT(reporter, sizeWritten == writer.bytesWritten());
226
227 auto result(writer.snapshotAsData());
228
229 SkReadBuffer reader(result->data(), result->size());
230 auto d0(reader.readByteArrayAsData()),
231 d1(reader.readByteArrayAsData()),
232 d2(reader.readByteArrayAsData());
233
234 REPORTER_ASSERT(reporter, 0 == d0->size());
235 REPORTER_ASSERT(reporter, strlen(str)+1 == d1->size());
236 REPORTER_ASSERT(reporter, !memcmp(str, d1->data(), strlen(str)+1));
237 REPORTER_ASSERT(reporter, 0 == d2->size());
238
239 REPORTER_ASSERT(reporter, reader.offset() == sizeWritten);
240 REPORTER_ASSERT(reporter, reader.eof());
241 }
242