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1 /* | 1 /* |
2 * Copyright 2013 Google Inc. | 2 * Copyright 2013 Google Inc. |
3 * | 3 * |
4 * Use of this source code is governed by a BSD-style license that can be | 4 * Use of this source code is governed by a BSD-style license that can be |
5 * found in the LICENSE file. | 5 * found in the LICENSE file. |
6 */ | 6 */ |
7 | 7 |
8 #include "SkBitmap.h" | |
9 #include "SkFrontBufferedStream.h" | 8 #include "SkFrontBufferedStream.h" |
10 #include "SkImageDecoder.h" | |
11 #include "SkRefCnt.h" | 9 #include "SkRefCnt.h" |
12 #include "SkStream.h" | 10 #include "SkStream.h" |
13 #include "SkTypes.h" | 11 #include "SkTypes.h" |
14 #include "Test.h" | 12 #include "Test.h" |
15 | 13 |
16 static void test_read(skiatest::Reporter* reporter, SkStream* bufferedStream, | 14 static void test_read(skiatest::Reporter* reporter, SkStream* bufferedStream, |
17 const void* expectations, size_t bytesToRead) { | 15 const void* expectations, size_t bytesToRead) { |
18 // output for reading bufferedStream. | 16 // output for reading bufferedStream. |
19 SkAutoMalloc storage(bytesToRead); | 17 SkAutoMalloc storage(bytesToRead); |
20 | 18 |
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244 test_length_combos(reporter, bufferSize); | 242 test_length_combos(reporter, bufferSize); |
245 test_initial_offset(reporter, bufferSize); | 243 test_initial_offset(reporter, bufferSize); |
246 } | 244 } |
247 | 245 |
248 DEF_TEST(FrontBufferedStream, reporter) { | 246 DEF_TEST(FrontBufferedStream, reporter) { |
249 // Test 6 and 64, which are used by Android, as well as another arbitrary le
ngth. | 247 // Test 6 and 64, which are used by Android, as well as another arbitrary le
ngth. |
250 test_buffers(reporter, 6); | 248 test_buffers(reporter, 6); |
251 test_buffers(reporter, 15); | 249 test_buffers(reporter, 15); |
252 test_buffers(reporter, 64); | 250 test_buffers(reporter, 64); |
253 } | 251 } |
254 | |
255 // Test that a FrontBufferedStream does not allow reading after the end of a str
eam. | |
256 // This class is a dummy SkStream which reports that it is at the end on the fir
st | |
257 // read (simulating a failure). Then it tracks whether someone calls read() agai
n. | |
258 class FailingStream : public SkStream { | |
259 public: | |
260 FailingStream() | |
261 : fAtEnd(false) | |
262 , fReadAfterEnd(false) | |
263 {} | |
264 virtual size_t read(void* buffer, size_t size) SK_OVERRIDE { | |
265 if (fAtEnd) { | |
266 fReadAfterEnd = true; | |
267 } else { | |
268 fAtEnd = true; | |
269 } | |
270 return 0; | |
271 } | |
272 | |
273 virtual bool isAtEnd() const SK_OVERRIDE { | |
274 return fAtEnd; | |
275 } | |
276 | |
277 bool readAfterEnd() const { | |
278 return fReadAfterEnd; | |
279 } | |
280 private: | |
281 bool fAtEnd; | |
282 bool fReadAfterEnd; | |
283 }; | |
284 | |
285 DEF_TEST(ShortFrontBufferedStream, reporter) { | |
286 FailingStream failingStream; | |
287 SkAutoTUnref<SkStreamRewindable> stream(SkFrontBufferedStream::Create(&faili
ngStream, 64)); | |
288 SkBitmap bm; | |
289 // The return value of DecodeStream is not important. We are just using Deco
deStream because | |
290 // it simulates a bug. DecodeStream will read the stream, then rewind, then
attempt to read | |
291 // again. FrontBufferedStream::read should not continue to read its underlyi
ng stream beyond | |
292 // its end. | |
293 SkImageDecoder::DecodeStream(stream, &bm); | |
294 REPORTER_ASSERT(reporter, !failingStream.readAfterEnd()); | |
295 } | |
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