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
|
/*
* Copyright 2011 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include <stdlib.h>
#include <string.h>
#include "Test.h"
#include "SkData.h"
#include "SkFlate.h"
#include "SkStream.h"
// A memory stream that reports zero size with the standard call, like
// an unseekable file stream would.
class SkZeroSizeMemStream : public SkMemoryStream {
public:
virtual size_t read(void* buffer, size_t size) {
if (buffer == NULL && size == 0)
return 0;
if (buffer == NULL && size == kGetSizeKey)
size = 0;
return SkMemoryStream::read(buffer, size);
}
static const size_t kGetSizeKey = 0xDEADBEEF;
};
static void TestFlate(skiatest::Reporter* reporter, SkMemoryStream* testStream,
size_t dataSize) {
if (testStream == NULL)
return;
SkMemoryStream testData(dataSize);
uint8_t* data = (uint8_t*)testData.getMemoryBase();
srand(0); // Make data deterministic.
for (size_t i = 0; i < dataSize; i++)
data[i] = rand() & 0xFF;
testStream->setMemory(testData.getMemoryBase(), dataSize, true);
SkDynamicMemoryWStream compressed;
bool status = SkFlate::Deflate(testStream, &compressed);
REPORTER_ASSERT(reporter, status);
// Check that the input data wasn't changed.
size_t inputSize = testStream->getLength();
if (inputSize == 0)
inputSize = testStream->read(NULL, SkZeroSizeMemStream::kGetSizeKey);
REPORTER_ASSERT(reporter, testData.getLength() == inputSize);
REPORTER_ASSERT(reporter, memcmp(testData.getMemoryBase(),
testStream->getMemoryBase(),
testData.getLength()) == 0);
// Assume there are two test sizes, big and small.
if (dataSize < 1024)
REPORTER_ASSERT(reporter, compressed.getOffset() < 1024);
else
REPORTER_ASSERT(reporter, compressed.getOffset() > 1024);
SkAutoDataUnref data1(compressed.copyToData());
testStream->setData(data1.get())->unref();
SkDynamicMemoryWStream uncompressed;
status = SkFlate::Inflate(testStream, &uncompressed);
REPORTER_ASSERT(reporter, status);
// Check that the input data wasn't changed.
inputSize = testStream->getLength();
if (inputSize == 0)
inputSize = testStream->read(NULL, SkZeroSizeMemStream::kGetSizeKey);
REPORTER_ASSERT(reporter, data1.size() == inputSize);
REPORTER_ASSERT(reporter, memcmp(testStream->getMemoryBase(),
data1.data(), data1.size()) == 0);
// Check that the uncompressed data matches the source data.
SkAutoDataUnref data2(uncompressed.copyToData());
REPORTER_ASSERT(reporter, testData.getLength() == uncompressed.getOffset());
REPORTER_ASSERT(reporter, memcmp(testData.getMemoryBase(), data2.data(),
testData.getLength()) == 0);
}
static void TestFlateCompression(skiatest::Reporter* reporter) {
TestFlate(reporter, NULL, 0);
#if defined(SK_ZLIB_INCLUDE) && !defined(SK_DEBUG)
REPORTER_ASSERT(reporter, SkFlate::HaveFlate());
SkMemoryStream memStream;
TestFlate(reporter, &memStream, 512);
TestFlate(reporter, &memStream, 10240);
SkZeroSizeMemStream fileStream;
TestFlate(reporter, &fileStream, 512);
TestFlate(reporter, &fileStream, 10240);
#endif
}
#include "TestClassDef.h"
DEFINE_TESTCLASS("Flate", FlateTestClass, TestFlateCompression)
|
