1 /* 2 * Copyright 2010 The Android Open Source Project 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 "SkBitmap.h" 9 #include "SkCanvas.h" 10 #include "SkData.h" 11 #include "SkFlate.h" 12 #include "SkImageEncoder.h" 13 #include "SkMatrix.h" 14 #include "SkPDFCatalog.h" 15 #include "SkPDFDevice.h" 16 #include "SkPDFStream.h" 17 #include "SkPDFTypes.h" 18 #include "SkScalar.h" 19 #include "SkStream.h" 20 #include "SkTypes.h" 21 #include "Test.h" 22 23 class SkPDFTestDict : public SkPDFDict { 24 public: 25 virtual void getResources(const SkTSet<SkPDFObject*>& knownResourceObjects, 26 SkTSet<SkPDFObject*>* newResourceObjects) { 27 for (int i = 0; i < fResources.count(); i++) { 28 newResourceObjects->add(fResources[i]); 29 fResources[i]->ref(); 30 } 31 } 32 33 void addResource(SkPDFObject* object) { 34 fResources.append(1, &object); 35 } 36 37 private: 38 SkTDArray<SkPDFObject*> fResources; 39 }; 40 41 #define DUMMY_TEXT "DCT compessed stream." 42 43 static SkData* encode_to_dct_data(size_t* pixelRefOffset, const SkBitmap& bitmap) { 44 *pixelRefOffset = 0; 45 return SkData::NewWithProc(DUMMY_TEXT, sizeof(DUMMY_TEXT) - 1, NULL, NULL); 46 } 47 48 static bool stream_equals(const SkDynamicMemoryWStream& stream, size_t offset, 49 const void* buffer, size_t len) { 50 SkAutoDataUnref data(stream.copyToData()); 51 if (offset + len > data->size()) { 52 return false; 53 } 54 return memcmp(data->bytes() + offset, buffer, len) == 0; 55 } 56 57 static bool stream_contains(const SkDynamicMemoryWStream& stream, 58 const char* buffer) { 59 SkAutoDataUnref data(stream.copyToData()); 60 int len = strlen(buffer); // our buffer does not have EOSs. 61 62 for (int offset = 0 ; offset < (int)data->size() - len; offset++) { 63 if (memcmp(data->bytes() + offset, buffer, len) == 0) { 64 return true; 65 } 66 } 67 68 return false; 69 } 70 71 static void CheckObjectOutput(skiatest::Reporter* reporter, SkPDFObject* obj, 72 const char* expectedData, size_t expectedSize, 73 bool indirect, bool compression) { 74 SkPDFDocument::Flags docFlags = (SkPDFDocument::Flags) 0; 75 if (!compression) { 76 docFlags = SkTBitOr(docFlags, SkPDFDocument::kFavorSpeedOverSize_Flags); 77 } 78 SkPDFCatalog catalog(docFlags); 79 size_t directSize = obj->getOutputSize(&catalog, false); 80 REPORTER_ASSERT(reporter, directSize == expectedSize); 81 82 SkDynamicMemoryWStream buffer; 83 obj->emit(&buffer, &catalog, false); 84 REPORTER_ASSERT(reporter, directSize == buffer.getOffset()); 85 REPORTER_ASSERT(reporter, stream_equals(buffer, 0, expectedData, 86 directSize)); 87 88 if (indirect) { 89 // Indirect output. 90 static char header[] = "1 0 obj\n"; 91 static size_t headerLen = strlen(header); 92 static char footer[] = "\nendobj\n"; 93 static size_t footerLen = strlen(footer); 94 95 catalog.addObject(obj, false); 96 97 size_t indirectSize = obj->getOutputSize(&catalog, true); 98 REPORTER_ASSERT(reporter, 99 indirectSize == directSize + headerLen + footerLen); 100 101 buffer.reset(); 102 obj->emit(&buffer, &catalog, true); 103 REPORTER_ASSERT(reporter, indirectSize == buffer.getOffset()); 104 REPORTER_ASSERT(reporter, stream_equals(buffer, 0, header, headerLen)); 105 REPORTER_ASSERT(reporter, stream_equals(buffer, headerLen, expectedData, 106 directSize)); 107 REPORTER_ASSERT(reporter, stream_equals(buffer, headerLen + directSize, 108 footer, footerLen)); 109 } 110 } 111 112 static void SimpleCheckObjectOutput(skiatest::Reporter* reporter, 113 SkPDFObject* obj, 114 const char* expectedResult) { 115 CheckObjectOutput(reporter, obj, expectedResult, 116 strlen(expectedResult), true, false); 117 } 118 119 static void TestPDFStream(skiatest::Reporter* reporter) { 120 char streamBytes[] = "Test\nFoo\tBar"; 121 SkAutoTUnref<SkMemoryStream> streamData(new SkMemoryStream( 122 streamBytes, strlen(streamBytes), true)); 123 SkAutoTUnref<SkPDFStream> stream(new SkPDFStream(streamData.get())); 124 SimpleCheckObjectOutput( 125 reporter, stream.get(), 126 "<</Length 12\n>> stream\nTest\nFoo\tBar\nendstream"); 127 stream->insert("Attribute", new SkPDFInt(42))->unref(); 128 SimpleCheckObjectOutput(reporter, stream.get(), 129 "<</Length 12\n/Attribute 42\n>> stream\n" 130 "Test\nFoo\tBar\nendstream"); 131 132 if (SkFlate::HaveFlate()) { 133 char streamBytes2[] = "This is a longer string, so that compression " 134 "can do something with it. With shorter strings, " 135 "the short circuit logic cuts in and we end up " 136 "with an uncompressed string."; 137 SkAutoDataUnref streamData2(SkData::NewWithCopy(streamBytes2, 138 strlen(streamBytes2))); 139 SkAutoTUnref<SkPDFStream> stream(new SkPDFStream(streamData2.get())); 140 141 SkDynamicMemoryWStream compressedByteStream; 142 SkFlate::Deflate(streamData2.get(), &compressedByteStream); 143 SkAutoDataUnref compressedData(compressedByteStream.copyToData()); 144 145 // Check first without compression. 146 SkDynamicMemoryWStream expectedResult1; 147 expectedResult1.writeText("<</Length 167\n>> stream\n"); 148 expectedResult1.writeText(streamBytes2); 149 expectedResult1.writeText("\nendstream"); 150 SkAutoDataUnref expectedResultData1(expectedResult1.copyToData()); 151 CheckObjectOutput(reporter, stream.get(), 152 (const char*) expectedResultData1->data(), 153 expectedResultData1->size(), true, false); 154 155 // Then again with compression. 156 SkDynamicMemoryWStream expectedResult2; 157 expectedResult2.writeText("<</Filter /FlateDecode\n/Length 116\n" 158 ">> stream\n"); 159 expectedResult2.write(compressedData->data(), compressedData->size()); 160 expectedResult2.writeText("\nendstream"); 161 SkAutoDataUnref expectedResultData2(expectedResult2.copyToData()); 162 CheckObjectOutput(reporter, stream.get(), 163 (const char*) expectedResultData2->data(), 164 expectedResultData2->size(), true, true); 165 } 166 } 167 168 static void TestCatalog(skiatest::Reporter* reporter) { 169 SkPDFCatalog catalog((SkPDFDocument::Flags)0); 170 SkAutoTUnref<SkPDFInt> int1(new SkPDFInt(1)); 171 SkAutoTUnref<SkPDFInt> int2(new SkPDFInt(2)); 172 SkAutoTUnref<SkPDFInt> int3(new SkPDFInt(3)); 173 int1.get()->ref(); 174 SkAutoTUnref<SkPDFInt> int1Again(int1.get()); 175 176 catalog.addObject(int1.get(), false); 177 catalog.addObject(int2.get(), false); 178 catalog.addObject(int3.get(), false); 179 180 REPORTER_ASSERT(reporter, catalog.getObjectNumberSize(int1.get()) == 3); 181 REPORTER_ASSERT(reporter, catalog.getObjectNumberSize(int2.get()) == 3); 182 REPORTER_ASSERT(reporter, catalog.getObjectNumberSize(int3.get()) == 3); 183 184 SkDynamicMemoryWStream buffer; 185 catalog.emitObjectNumber(&buffer, int1.get()); 186 catalog.emitObjectNumber(&buffer, int2.get()); 187 catalog.emitObjectNumber(&buffer, int3.get()); 188 catalog.emitObjectNumber(&buffer, int1Again.get()); 189 char expectedResult[] = "1 02 03 01 0"; 190 REPORTER_ASSERT(reporter, stream_equals(buffer, 0, expectedResult, 191 strlen(expectedResult))); 192 } 193 194 static void TestObjectRef(skiatest::Reporter* reporter) { 195 SkAutoTUnref<SkPDFInt> int1(new SkPDFInt(1)); 196 SkAutoTUnref<SkPDFInt> int2(new SkPDFInt(2)); 197 SkAutoTUnref<SkPDFObjRef> int2ref(new SkPDFObjRef(int2.get())); 198 199 SkPDFCatalog catalog((SkPDFDocument::Flags)0); 200 catalog.addObject(int1.get(), false); 201 catalog.addObject(int2.get(), false); 202 REPORTER_ASSERT(reporter, catalog.getObjectNumberSize(int1.get()) == 3); 203 REPORTER_ASSERT(reporter, catalog.getObjectNumberSize(int2.get()) == 3); 204 205 char expectedResult[] = "2 0 R"; 206 SkDynamicMemoryWStream buffer; 207 int2ref->emitObject(&buffer, &catalog, false); 208 REPORTER_ASSERT(reporter, buffer.getOffset() == strlen(expectedResult)); 209 REPORTER_ASSERT(reporter, stream_equals(buffer, 0, expectedResult, 210 buffer.getOffset())); 211 } 212 213 static void TestSubstitute(skiatest::Reporter* reporter) { 214 SkAutoTUnref<SkPDFTestDict> proxy(new SkPDFTestDict()); 215 SkAutoTUnref<SkPDFTestDict> stub(new SkPDFTestDict()); 216 SkAutoTUnref<SkPDFInt> int33(new SkPDFInt(33)); 217 SkAutoTUnref<SkPDFDict> stubResource(new SkPDFDict()); 218 SkAutoTUnref<SkPDFInt> int44(new SkPDFInt(44)); 219 220 stub->insert("Value", int33.get()); 221 stubResource->insert("InnerValue", int44.get()); 222 stub->addResource(stubResource.get()); 223 224 SkPDFCatalog catalog((SkPDFDocument::Flags)0); 225 catalog.addObject(proxy.get(), false); 226 catalog.setSubstitute(proxy.get(), stub.get()); 227 228 SkDynamicMemoryWStream buffer; 229 proxy->emit(&buffer, &catalog, false); 230 catalog.emitSubstituteResources(&buffer, false); 231 232 char objectResult[] = "2 0 obj\n<</Value 33\n>>\nendobj\n"; 233 REPORTER_ASSERT( 234 reporter, 235 catalog.setFileOffset(proxy.get(), 0) == strlen(objectResult)); 236 237 char expectedResult[] = 238 "<</Value 33\n>>1 0 obj\n<</InnerValue 44\n>>\nendobj\n"; 239 REPORTER_ASSERT(reporter, buffer.getOffset() == strlen(expectedResult)); 240 REPORTER_ASSERT(reporter, stream_equals(buffer, 0, expectedResult, 241 buffer.getOffset())); 242 } 243 244 // Create a bitmap that would be very eficiently compressed in a ZIP. 245 static void setup_bitmap(SkBitmap* bitmap, int width, int height) { 246 bitmap->allocN32Pixels(width, height); 247 bitmap->eraseColor(SK_ColorWHITE); 248 } 249 250 static void TestImage(skiatest::Reporter* reporter, const SkBitmap& bitmap, 251 const char* expected, bool useDCTEncoder) { 252 SkISize pageSize = SkISize::Make(bitmap.width(), bitmap.height()); 253 SkAutoTUnref<SkPDFDevice> dev(new SkPDFDevice(pageSize, pageSize, SkMatrix::I())); 254 255 if (useDCTEncoder) { 256 dev->setDCTEncoder(encode_to_dct_data); 257 } 258 259 SkCanvas c(dev); 260 c.drawBitmap(bitmap, 0, 0, NULL); 261 262 SkPDFDocument doc; 263 doc.appendPage(dev); 264 265 SkDynamicMemoryWStream stream; 266 doc.emitPDF(&stream); 267 268 REPORTER_ASSERT(reporter, stream_contains(stream, expected)); 269 } 270 271 static void TestUncompressed(skiatest::Reporter* reporter) { 272 SkBitmap bitmap; 273 setup_bitmap(&bitmap, 1, 1); 274 TestImage(reporter, bitmap, 275 "/Subtype /Image\n" 276 "/Width 1\n" 277 "/Height 1\n" 278 "/ColorSpace /DeviceRGB\n" 279 "/BitsPerComponent 8\n" 280 "/Length 3\n" 281 ">> stream", 282 true); 283 } 284 285 static void TestFlateDecode(skiatest::Reporter* reporter) { 286 if (!SkFlate::HaveFlate()) { 287 return; 288 } 289 SkBitmap bitmap; 290 setup_bitmap(&bitmap, 10, 10); 291 TestImage(reporter, bitmap, 292 "/Subtype /Image\n" 293 "/Width 10\n" 294 "/Height 10\n" 295 "/ColorSpace /DeviceRGB\n" 296 "/BitsPerComponent 8\n" 297 "/Filter /FlateDecode\n" 298 "/Length 13\n" 299 ">> stream", 300 false); 301 } 302 303 static void TestDCTDecode(skiatest::Reporter* reporter) { 304 SkBitmap bitmap; 305 setup_bitmap(&bitmap, 32, 32); 306 TestImage(reporter, bitmap, 307 "/Subtype /Image\n" 308 "/Width 32\n" 309 "/Height 32\n" 310 "/ColorSpace /DeviceRGB\n" 311 "/BitsPerComponent 8\n" 312 "/Filter /DCTDecode\n" 313 "/ColorTransform 0\n" 314 "/Length 21\n" 315 ">> stream", 316 true); 317 } 318 319 static void TestImages(skiatest::Reporter* reporter) { 320 TestUncompressed(reporter); 321 TestFlateDecode(reporter); 322 TestDCTDecode(reporter); 323 } 324 325 // This test used to assert without the fix submitted for 326 // http://code.google.com/p/skia/issues/detail?id=1083. 327 // SKP files might have invalid glyph ids. This test ensures they are ignored, 328 // and there is no assert on input data in Debug mode. 329 static void test_issue1083() { 330 SkISize pageSize = SkISize::Make(100, 100); 331 SkAutoTUnref<SkPDFDevice> dev(new SkPDFDevice(pageSize, pageSize, SkMatrix::I())); 332 333 SkCanvas c(dev); 334 SkPaint paint; 335 paint.setTextEncoding(SkPaint::kGlyphID_TextEncoding); 336 337 uint16_t glyphID = 65000; 338 c.drawText(&glyphID, 2, 0, 0, paint); 339 340 SkPDFDocument doc; 341 doc.appendPage(dev); 342 343 SkDynamicMemoryWStream stream; 344 doc.emitPDF(&stream); 345 } 346 347 DEF_TEST(PDFPrimitives, reporter) { 348 SkAutoTUnref<SkPDFInt> int42(new SkPDFInt(42)); 349 SimpleCheckObjectOutput(reporter, int42.get(), "42"); 350 351 SkAutoTUnref<SkPDFScalar> realHalf(new SkPDFScalar(SK_ScalarHalf)); 352 SimpleCheckObjectOutput(reporter, realHalf.get(), "0.5"); 353 354 SkAutoTUnref<SkPDFScalar> bigScalar(new SkPDFScalar(110999.75f)); 355 #if !defined(SK_ALLOW_LARGE_PDF_SCALARS) 356 SimpleCheckObjectOutput(reporter, bigScalar.get(), "111000"); 357 #else 358 SimpleCheckObjectOutput(reporter, bigScalar.get(), "110999.75"); 359 360 SkAutoTUnref<SkPDFScalar> biggerScalar(new SkPDFScalar(50000000.1)); 361 SimpleCheckObjectOutput(reporter, biggerScalar.get(), "50000000"); 362 363 SkAutoTUnref<SkPDFScalar> smallestScalar(new SkPDFScalar(1.0/65536)); 364 SimpleCheckObjectOutput(reporter, smallestScalar.get(), "0.00001526"); 365 #endif 366 367 SkAutoTUnref<SkPDFString> stringSimple( 368 new SkPDFString("test ) string ( foo")); 369 SimpleCheckObjectOutput(reporter, stringSimple.get(), 370 "(test \\) string \\( foo)"); 371 SkAutoTUnref<SkPDFString> stringComplex( 372 new SkPDFString("\ttest ) string ( foo")); 373 SimpleCheckObjectOutput(reporter, stringComplex.get(), 374 "<0974657374202920737472696E67202820666F6F>"); 375 376 SkAutoTUnref<SkPDFName> name(new SkPDFName("Test name\twith#tab")); 377 const char expectedResult[] = "/Test#20name#09with#23tab"; 378 CheckObjectOutput(reporter, name.get(), expectedResult, 379 strlen(expectedResult), false, false); 380 381 SkAutoTUnref<SkPDFName> escapedName(new SkPDFName("A#/%()<>[]{}B")); 382 const char escapedNameExpected[] = "/A#23#2F#25#28#29#3C#3E#5B#5D#7B#7DB"; 383 CheckObjectOutput(reporter, escapedName.get(), escapedNameExpected, 384 strlen(escapedNameExpected), false, false); 385 386 // Test that we correctly handle characters with the high-bit set. 387 const unsigned char highBitCString[] = {0xDE, 0xAD, 'b', 'e', 0xEF, 0}; 388 SkAutoTUnref<SkPDFName> highBitName( 389 new SkPDFName((const char*)highBitCString)); 390 const char highBitExpectedResult[] = "/#DE#ADbe#EF"; 391 CheckObjectOutput(reporter, highBitName.get(), highBitExpectedResult, 392 strlen(highBitExpectedResult), false, false); 393 394 SkAutoTUnref<SkPDFArray> array(new SkPDFArray); 395 SimpleCheckObjectOutput(reporter, array.get(), "[]"); 396 array->append(int42.get()); 397 SimpleCheckObjectOutput(reporter, array.get(), "[42]"); 398 array->append(realHalf.get()); 399 SimpleCheckObjectOutput(reporter, array.get(), "[42 0.5]"); 400 SkAutoTUnref<SkPDFInt> int0(new SkPDFInt(0)); 401 array->append(int0.get()); 402 SimpleCheckObjectOutput(reporter, array.get(), "[42 0.5 0]"); 403 SkAutoTUnref<SkPDFInt> int1(new SkPDFInt(1)); 404 array->setAt(0, int1.get()); 405 SimpleCheckObjectOutput(reporter, array.get(), "[1 0.5 0]"); 406 407 SkAutoTUnref<SkPDFDict> dict(new SkPDFDict); 408 SimpleCheckObjectOutput(reporter, dict.get(), "<<>>"); 409 SkAutoTUnref<SkPDFName> n1(new SkPDFName("n1")); 410 dict->insert(n1.get(), int42.get()); 411 SimpleCheckObjectOutput(reporter, dict.get(), "<</n1 42\n>>"); 412 SkAutoTUnref<SkPDFName> n2(new SkPDFName("n2")); 413 SkAutoTUnref<SkPDFName> n3(new SkPDFName("n3")); 414 dict->insert(n2.get(), realHalf.get()); 415 dict->insert(n3.get(), array.get()); 416 SimpleCheckObjectOutput(reporter, dict.get(), 417 "<</n1 42\n/n2 0.5\n/n3 [1 0.5 0]\n>>"); 418 419 TestPDFStream(reporter); 420 421 TestCatalog(reporter); 422 423 TestObjectRef(reporter); 424 425 TestSubstitute(reporter); 426 427 test_issue1083(); 428 429 TestImages(reporter); 430 } 431
