59f46b81f8
http://codereview.appspot.com/6392044 git-svn-id: http://skia.googlecode.com/svn/trunk@4511 2bbb7eff-a529-9590-31e7-b0007b416f81
105 lines
3.5 KiB
C++
105 lines
3.5 KiB
C++
|
|
/*
|
|
* 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)
|