зеркало из https://github.com/mozilla/moz-skia.git
108 строки
3.9 KiB
C++
108 строки
3.9 KiB
C++
/*
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* Copyright (C) 2011 Google Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <stdlib.h>
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#include <string.h>
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#include "Test.h"
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#include "SkFlate.h"
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#include "SkStream.h"
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// A memory stream that reports zero size with the standard call, like
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// an unseekable file stream would.
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class SkZeroSizeMemStream : public SkMemoryStream {
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public:
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virtual size_t read(void* buffer, size_t size) {
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if (buffer == NULL && size == 0)
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return 0;
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if (buffer == NULL && size == kGetSizeKey)
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size = 0;
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return SkMemoryStream::read(buffer, size);
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}
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static const size_t kGetSizeKey = 0xDEADBEEF;
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};
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static void TestFlate(skiatest::Reporter* reporter, SkMemoryStream* testStream,
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size_t dataSize) {
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if (testStream == NULL)
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return;
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SkMemoryStream testData(dataSize);
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uint8_t* data = (uint8_t*)testData.getMemoryBase();
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srand(0); // Make data deterministic.
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for (size_t i = 0; i < dataSize; i++)
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data[i] = rand() & 0xFF;
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testStream->setMemory(testData.getMemoryBase(), dataSize, true);
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SkDynamicMemoryWStream compressed;
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bool status = SkFlate::Deflate(testStream, &compressed);
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REPORTER_ASSERT(reporter, status);
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// Check that the input data wasn't changed.
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size_t inputSize = testStream->getLength();
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if (inputSize == 0)
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inputSize = testStream->read(NULL, SkZeroSizeMemStream::kGetSizeKey);
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REPORTER_ASSERT(reporter, testData.getLength() == inputSize);
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REPORTER_ASSERT(reporter, memcmp(testData.getMemoryBase(),
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testStream->getMemoryBase(),
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testData.getLength()) == 0);
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// Assume there are two test sizes, big and small.
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if (dataSize < 1024)
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REPORTER_ASSERT(reporter, compressed.getOffset() < 1024);
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else
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REPORTER_ASSERT(reporter, compressed.getOffset() > 1024);
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testStream->setMemory(compressed.getStream(), compressed.getOffset(), true);
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SkDynamicMemoryWStream uncompressed;
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status = SkFlate::Inflate(testStream, &uncompressed);
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REPORTER_ASSERT(reporter, status);
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// Check that the input data wasn't changed.
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inputSize = testStream->getLength();
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if (inputSize == 0)
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inputSize = testStream->read(NULL, SkZeroSizeMemStream::kGetSizeKey);
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REPORTER_ASSERT(reporter, compressed.getOffset() == inputSize);
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REPORTER_ASSERT(reporter, memcmp(testStream->getMemoryBase(),
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compressed.getStream(),
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compressed.getOffset()) == 0);
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// Check that the uncompressed data matches the source data.
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REPORTER_ASSERT(reporter, testData.getLength() == uncompressed.getOffset());
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REPORTER_ASSERT(reporter, memcmp(testData.getMemoryBase(),
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uncompressed.getStream(),
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testData.getLength()) == 0);
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}
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static void TestFlateCompression(skiatest::Reporter* reporter) {
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TestFlate(reporter, NULL, 0);
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#if defined(SK_ZLIB_INCLUDE) && !defined(SK_DEBUG)
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REPORTER_ASSERT(reporter, SkFlate::HaveFlate());
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SkMemoryStream memStream;
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TestFlate(reporter, &memStream, 512);
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TestFlate(reporter, &memStream, 10240);
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SkZeroSizeMemStream fileStream;
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TestFlate(reporter, &fileStream, 512);
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TestFlate(reporter, &fileStream, 10240);
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#endif
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}
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#include "TestClassDef.h"
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DEFINE_TESTCLASS("Flate", FlateTestClass, TestFlateCompression)
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