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 "tests/Test.h"
9
10 #ifdef SK_SUPPORT_PDF
11
12 #include "include/core/SkBitmap.h"
13 #include "include/core/SkCanvas.h"
14 #include "include/core/SkData.h"
15 #include "include/core/SkImageEncoder.h"
16 #include "include/core/SkMatrix.h"
17 #include "include/core/SkScalar.h"
18 #include "include/core/SkStream.h"
19 #include "include/core/SkTypes.h"
20 #include "include/effects/SkMorphologyImageFilter.h"
21 #include "include/effects/SkPerlinNoiseShader.h"
22 #include "include/private/SkTo.h"
23 #include "src/core/SkGlyphRun.h"
24 #include "src/core/SkImageFilter_Base.h"
25 #include "src/core/SkReadBuffer.h"
26 #include "src/core/SkSpecialImage.h"
27 #include "src/pdf/SkClusterator.h"
28 #include "src/pdf/SkDeflate.h"
29 #include "src/pdf/SkPDFDevice.h"
30 #include "src/pdf/SkPDFDocumentPriv.h"
31 #include "src/pdf/SkPDFFont.h"
32 #include "src/pdf/SkPDFTypes.h"
33 #include "src/pdf/SkPDFUnion.h"
34 #include "src/pdf/SkPDFUtils.h"
35 #include "tools/Resources.h"
36 #include "tools/ToolUtils.h"
37
38 #include <cstdlib>
39 #include <cmath>
40
41 #define DUMMY_TEXT "DCT compessed stream."
42
43 template <typename T>
emit_to_string(T & obj)44 static SkString emit_to_string(T& obj) {
45 SkDynamicMemoryWStream buffer;
46 obj.emitObject(&buffer);
47 SkString tmp(buffer.bytesWritten());
48 buffer.copyTo(tmp.writable_str());
49 return tmp;
50 }
51
eq(const SkString & str,const char * strPtr,size_t len)52 static bool eq(const SkString& str, const char* strPtr, size_t len) {
53 return len == str.size() && 0 == memcmp(str.c_str(), strPtr, len);
54 }
55
assert_eql(skiatest::Reporter * reporter,const SkString & skString,const char * str,size_t len)56 static void assert_eql(skiatest::Reporter* reporter,
57 const SkString& skString,
58 const char* str,
59 size_t len) {
60 if (!eq(skString, str, len)) {
61 REPORT_FAILURE(reporter, "", SkStringPrintf(
62 "'%*s' != '%s'", len, str, skString.c_str()));
63 }
64 }
65
assert_eq(skiatest::Reporter * reporter,const SkString & skString,const char * str)66 static void assert_eq(skiatest::Reporter* reporter,
67 const SkString& skString,
68 const char* str) {
69 assert_eql(reporter, skString, str, strlen(str));
70 }
71
72
73 template <typename T>
assert_emit_eq(skiatest::Reporter * reporter,T & object,const char * string)74 static void assert_emit_eq(skiatest::Reporter* reporter,
75 T& object,
76 const char* string) {
77 SkString result = emit_to_string(object);
78 assert_eq(reporter, result, string);
79 }
80
81 // This test used to assert without the fix submitted for
82 // http://code.google.com/p/skia/issues/detail?id=1083.
83 // SKP files might have invalid glyph ids. This test ensures they are ignored,
84 // and there is no assert on input data in Debug mode.
test_issue1083()85 static void test_issue1083() {
86 SkDynamicMemoryWStream outStream;
87 auto doc = SkPDF::MakeDocument(&outStream);
88 SkCanvas* canvas = doc->beginPage(100.0f, 100.0f);
89
90 uint16_t glyphID = 65000;
91 canvas->drawSimpleText(&glyphID, 2, SkTextEncoding::kGlyphID, 0, 0, SkFont(), SkPaint());
92
93 doc->close();
94 }
95
assert_emit_eq_number(skiatest::Reporter * reporter,float number)96 static void assert_emit_eq_number(skiatest::Reporter* reporter, float number) {
97 SkPDFUnion pdfUnion = SkPDFUnion::Scalar(number);
98 SkString result = emit_to_string(pdfUnion);
99 float value = static_cast<float>(std::atof(result.c_str()));
100 if (value != number) {
101 ERRORF(reporter, "%.9g != %s", number, result.c_str());
102 }
103 }
104
105
TestPDFUnion(skiatest::Reporter * reporter)106 static void TestPDFUnion(skiatest::Reporter* reporter) {
107 SkPDFUnion boolTrue = SkPDFUnion::Bool(true);
108 assert_emit_eq(reporter, boolTrue, "true");
109
110 SkPDFUnion boolFalse = SkPDFUnion::Bool(false);
111 assert_emit_eq(reporter, boolFalse, "false");
112
113 SkPDFUnion int42 = SkPDFUnion::Int(42);
114 assert_emit_eq(reporter, int42, "42");
115
116 assert_emit_eq_number(reporter, SK_ScalarHalf);
117 assert_emit_eq_number(reporter, 110999.75f); // bigScalar
118 assert_emit_eq_number(reporter, 50000000.1f); // biggerScalar
119 assert_emit_eq_number(reporter, 1.0f / 65536); // smallScalar
120
121 SkPDFUnion stringSimple = SkPDFUnion::String("test ) string ( foo");
122 assert_emit_eq(reporter, stringSimple, "(test \\) string \\( foo)");
123
124 SkString stringComplexInput("\ttest ) string ( foo");
125 SkPDFUnion stringComplex = SkPDFUnion::String(stringComplexInput);
126 assert_emit_eq(reporter, stringComplex, "(\\011test \\) string \\( foo)");
127
128 SkString binaryStringInput("\1\2\3\4\5\6\7\10\11\12\13\14\15\16\17\20");
129 SkPDFUnion binaryString = SkPDFUnion::String(binaryStringInput);
130 assert_emit_eq(reporter, binaryString, "<0102030405060708090A0B0C0D0E0F10>");
131
132 SkString nameInput("Test name\twith#tab");
133 SkPDFUnion name = SkPDFUnion::Name(nameInput);
134 assert_emit_eq(reporter, name, "/Test#20name#09with#23tab");
135
136 SkString nameInput2("A#/%()<>[]{}B");
137 SkPDFUnion name2 = SkPDFUnion::Name(nameInput2);
138 assert_emit_eq(reporter, name2, "/A#23#2F#25#28#29#3C#3E#5B#5D#7B#7DB");
139
140 SkPDFUnion name3 = SkPDFUnion::Name("SimpleNameWithOnlyPrintableASCII");
141 assert_emit_eq(reporter, name3, "/SimpleNameWithOnlyPrintableASCII");
142
143 // Test that we correctly handle characters with the high-bit set.
144 SkString highBitString("\xDE\xAD" "be\xEF");
145 SkPDFUnion highBitName = SkPDFUnion::Name(highBitString);
146 assert_emit_eq(reporter, highBitName, "/#DE#ADbe#EF");
147
148 // https://bugs.skia.org/9508
149 // https://crbug.com/494913
150 // Trailing '\0' characters must be removed.
151 const char nameInput4[] = "Test name with nil\0";
152 SkPDFUnion name4 = SkPDFUnion::Name(SkString(nameInput4, strlen(nameInput4) + 1));
153 assert_emit_eq(reporter, name4, "/Test#20name#20with#20nil");
154 }
155
TestPDFArray(skiatest::Reporter * reporter)156 static void TestPDFArray(skiatest::Reporter* reporter) {
157 std::unique_ptr<SkPDFArray> array(new SkPDFArray);
158 assert_emit_eq(reporter, *array, "[]");
159
160 array->appendInt(42);
161 assert_emit_eq(reporter, *array, "[42]");
162
163 array->appendScalar(SK_ScalarHalf);
164 assert_emit_eq(reporter, *array, "[42 .5]");
165
166 array->appendInt(0);
167 assert_emit_eq(reporter, *array, "[42 .5 0]");
168
169 array->appendBool(true);
170 assert_emit_eq(reporter, *array, "[42 .5 0 true]");
171
172 array->appendName("ThisName");
173 assert_emit_eq(reporter, *array, "[42 .5 0 true /ThisName]");
174
175 array->appendName(SkString("AnotherName"));
176 assert_emit_eq(reporter, *array, "[42 .5 0 true /ThisName /AnotherName]");
177
178 array->appendString("This String");
179 assert_emit_eq(reporter, *array,
180 "[42 .5 0 true /ThisName /AnotherName (This String)]");
181
182 array->appendString(SkString("Another String"));
183 assert_emit_eq(reporter, *array,
184 "[42 .5 0 true /ThisName /AnotherName (This String) "
185 "(Another String)]");
186
187 std::unique_ptr<SkPDFArray> innerArray(new SkPDFArray);
188 innerArray->appendInt(-1);
189 array->appendObject(std::move(innerArray));
190 assert_emit_eq(reporter, *array,
191 "[42 .5 0 true /ThisName /AnotherName (This String) "
192 "(Another String) [-1]]");
193 }
194
TestPDFDict(skiatest::Reporter * reporter)195 static void TestPDFDict(skiatest::Reporter* reporter) {
196 std::unique_ptr<SkPDFDict> dict(new SkPDFDict);
197 assert_emit_eq(reporter, *dict, "<<>>");
198
199 dict->insertInt("n1", SkToSizeT(42));
200 assert_emit_eq(reporter, *dict, "<</n1 42>>");
201
202 dict.reset(new SkPDFDict);
203 assert_emit_eq(reporter, *dict, "<<>>");
204
205 dict->insertInt("n1", 42);
206 assert_emit_eq(reporter, *dict, "<</n1 42>>");
207
208 dict->insertScalar("n2", SK_ScalarHalf);
209
210 SkString n3("n3");
211 std::unique_ptr<SkPDFArray> innerArray(new SkPDFArray);
212 innerArray->appendInt(-100);
213 dict->insertObject(n3, std::move(innerArray));
214 assert_emit_eq(reporter, *dict, "<</n1 42\n/n2 .5\n/n3 [-100]>>");
215
216 dict.reset(new SkPDFDict);
217 assert_emit_eq(reporter, *dict, "<<>>");
218
219 dict->insertInt("n1", 24);
220 assert_emit_eq(reporter, *dict, "<</n1 24>>");
221
222 dict->insertInt("n2", SkToSizeT(99));
223 assert_emit_eq(reporter, *dict, "<</n1 24\n/n2 99>>");
224
225 dict->insertScalar("n3", SK_ScalarHalf);
226 assert_emit_eq(reporter, *dict, "<</n1 24\n/n2 99\n/n3 .5>>");
227
228 dict->insertName("n4", "AName");
229 assert_emit_eq(reporter, *dict, "<</n1 24\n/n2 99\n/n3 .5\n/n4 /AName>>");
230
231 dict->insertName("n5", SkString("AnotherName"));
232 assert_emit_eq(reporter, *dict, "<</n1 24\n/n2 99\n/n3 .5\n/n4 /AName\n"
233 "/n5 /AnotherName>>");
234
235 dict->insertString("n6", "A String");
236 assert_emit_eq(reporter, *dict, "<</n1 24\n/n2 99\n/n3 .5\n/n4 /AName\n"
237 "/n5 /AnotherName\n/n6 (A String)>>");
238
239 dict->insertString("n7", SkString("Another String"));
240 assert_emit_eq(reporter, *dict, "<</n1 24\n/n2 99\n/n3 .5\n/n4 /AName\n"
241 "/n5 /AnotherName\n/n6 (A String)\n/n7 (Another String)>>");
242
243 dict.reset(new SkPDFDict("DType"));
244 assert_emit_eq(reporter, *dict, "<</Type /DType>>");
245 }
246
DEF_TEST(SkPDF_Primitives,reporter)247 DEF_TEST(SkPDF_Primitives, reporter) {
248 TestPDFUnion(reporter);
249 TestPDFArray(reporter);
250 TestPDFDict(reporter);
251 test_issue1083();
252 }
253
254 namespace {
255
256 class DummyImageFilter : public SkImageFilter_Base {
257 public:
Make(bool visited=false)258 static sk_sp<DummyImageFilter> Make(bool visited = false) {
259 return sk_sp<DummyImageFilter>(new DummyImageFilter(visited));
260 }
261
visited() const262 bool visited() const { return fVisited; }
263
264 protected:
onFilterImage(const Context & ctx,SkIPoint * offset) const265 sk_sp<SkSpecialImage> onFilterImage(const Context& ctx, SkIPoint* offset) const override {
266 fVisited = true;
267 offset->fX = offset->fY = 0;
268 return sk_ref_sp<SkSpecialImage>(ctx.sourceImage());
269 }
270
271 private:
272 SK_FLATTENABLE_HOOKS(DummyImageFilter)
DummyImageFilter(bool visited)273 DummyImageFilter(bool visited) : INHERITED(nullptr, 0, nullptr), fVisited(visited) {}
274
275 mutable bool fVisited;
276
277 typedef SkImageFilter_Base INHERITED;
278 };
279
CreateProc(SkReadBuffer & buffer)280 sk_sp<SkFlattenable> DummyImageFilter::CreateProc(SkReadBuffer& buffer) {
281 SK_IMAGEFILTER_UNFLATTEN_COMMON(common, 0);
282 bool visited = buffer.readBool();
283 return DummyImageFilter::Make(visited);
284 }
285
286 };
287
288 // Check that PDF rendering of image filters successfully falls back to
289 // CPU rasterization.
DEF_TEST(SkPDF_ImageFilter,reporter)290 DEF_TEST(SkPDF_ImageFilter, reporter) {
291 REQUIRE_PDF_DOCUMENT(SkPDF_ImageFilter, reporter);
292 SkDynamicMemoryWStream stream;
293 auto doc = SkPDF::MakeDocument(&stream);
294 SkCanvas* canvas = doc->beginPage(100.0f, 100.0f);
295
296 sk_sp<DummyImageFilter> filter(DummyImageFilter::Make());
297
298 // Filter just created; should be unvisited.
299 REPORTER_ASSERT(reporter, !filter->visited());
300 SkPaint paint;
301 paint.setImageFilter(filter);
302 canvas->drawRect(SkRect::MakeWH(100, 100), paint);
303 doc->close();
304
305 // Filter was used in rendering; should be visited.
306 REPORTER_ASSERT(reporter, filter->visited());
307 }
308
309 // Check that PDF rendering of image filters successfully falls back to
310 // CPU rasterization.
DEF_TEST(SkPDF_FontCanEmbedTypeface,reporter)311 DEF_TEST(SkPDF_FontCanEmbedTypeface, reporter) {
312 SkNullWStream nullWStream;
313 SkPDFDocument doc(&nullWStream, SkPDF::Metadata());
314
315 const char resource[] = "fonts/Roboto2-Regular_NoEmbed.ttf";
316 sk_sp<SkTypeface> noEmbedTypeface(MakeResourceAsTypeface(resource));
317 if (noEmbedTypeface) {
318 REPORTER_ASSERT(reporter,
319 !SkPDFFont::CanEmbedTypeface(noEmbedTypeface.get(), &doc));
320 }
321 sk_sp<SkTypeface> portableTypeface(ToolUtils::create_portable_typeface(nullptr, SkFontStyle()));
322 REPORTER_ASSERT(reporter,
323 SkPDFFont::CanEmbedTypeface(portableTypeface.get(), &doc));
324 }
325
326
327 // test to see that all finite scalars round trip via scanf().
check_pdf_scalar_serialization(skiatest::Reporter * reporter,float inputFloat)328 static void check_pdf_scalar_serialization(
329 skiatest::Reporter* reporter, float inputFloat) {
330 char floatString[kMaximumSkFloatToDecimalLength];
331 size_t len = SkFloatToDecimal(inputFloat, floatString);
332 if (len >= sizeof(floatString)) {
333 ERRORF(reporter, "string too long: %u", (unsigned)len);
334 return;
335 }
336 if (floatString[len] != '\0' || strlen(floatString) != len) {
337 ERRORF(reporter, "terminator misplaced.");
338 return; // The terminator is needed for sscanf().
339 }
340 if (reporter->verbose()) {
341 SkDebugf("%15.9g = \"%s\"\n", inputFloat, floatString);
342 }
343 float roundTripFloat;
344 if (1 != sscanf(floatString, "%f", &roundTripFloat)) {
345 ERRORF(reporter, "unscannable result: %s", floatString);
346 return;
347 }
348 if (std::isfinite(inputFloat) && roundTripFloat != inputFloat) {
349 ERRORF(reporter, "roundTripFloat (%.9g) != inputFloat (%.9g)",
350 roundTripFloat, inputFloat);
351 }
352 }
353
354 // Test SkPDFUtils::AppendScalar for accuracy.
DEF_TEST(SkPDF_Primitives_Scalar,reporter)355 DEF_TEST(SkPDF_Primitives_Scalar, reporter) {
356 SkRandom random(0x5EED);
357 int iterationCount = 512;
358 while (iterationCount-- > 0) {
359 union { uint32_t u; float f; };
360 u = random.nextU();
361 static_assert(sizeof(float) == sizeof(uint32_t), "");
362 check_pdf_scalar_serialization(reporter, f);
363 }
364 float alwaysCheck[] = {
365 0.0f, -0.0f, 1.0f, -1.0f, SK_ScalarPI, 0.1f, FLT_MIN, FLT_MAX,
366 -FLT_MIN, -FLT_MAX, FLT_MIN / 16.0f, -FLT_MIN / 16.0f,
367 SK_FloatNaN, SK_FloatInfinity, SK_FloatNegativeInfinity,
368 -FLT_MIN / 8388608.0
369 };
370 for (float inputFloat: alwaysCheck) {
371 check_pdf_scalar_serialization(reporter, inputFloat);
372 }
373 }
374
375 // Test SkPDFUtils:: for accuracy.
DEF_TEST(SkPDF_Primitives_Color,reporter)376 DEF_TEST(SkPDF_Primitives_Color, reporter) {
377 char buffer[5];
378 for (int i = 0; i < 256; ++i) {
379 size_t len = SkPDFUtils::ColorToDecimal(i, buffer);
380 REPORTER_ASSERT(reporter, len == strlen(buffer));
381 float f;
382 REPORTER_ASSERT(reporter, 1 == sscanf(buffer, "%f", &f));
383 int roundTrip = (int)(0.5 + f * 255);
384 REPORTER_ASSERT(reporter, roundTrip == i);
385 }
386 }
387
make_run(size_t len,const SkGlyphID * glyphs,SkPoint * pos,const SkFont & font,const uint32_t * clusters,size_t utf8TextByteLength,const char * utf8Text)388 static SkGlyphRun make_run(size_t len, const SkGlyphID* glyphs, SkPoint* pos,
389 const SkFont& font, const uint32_t* clusters,
390 size_t utf8TextByteLength, const char* utf8Text) {
391 return SkGlyphRun(font,
392 SkSpan<const SkPoint>{pos, len},
393 SkSpan<const SkGlyphID>{glyphs, len},
394 SkSpan<const char>{utf8Text, utf8TextByteLength},
395 SkSpan<const uint32_t>{clusters, len});
396 }
397
DEF_TEST(SkPDF_Clusterator,reporter)398 DEF_TEST(SkPDF_Clusterator, reporter) {
399 SkFont font;
400 {
401 constexpr unsigned len = 11;
402 const uint32_t clusters[len] = { 3, 2, 2, 1, 0, 4, 4, 7, 6, 6, 5 };
403 const SkGlyphID glyphs[len] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11};
404 SkPoint pos[len] = {{0, 0}, {0, 0}, {0, 0}, {0, 0}, {0, 0}, {0, 0},
405 {0, 0}, {0, 0}, {0, 0}, {0, 0}, {0, 0}};
406 const char text[] = "abcdefgh";
407 SkGlyphRun run = make_run(len, glyphs, pos, font, clusters, strlen(text), text);
408 SkClusterator clusterator(run);
409 SkClusterator::Cluster expectations[] = {
410 {&text[3], 1, 0, 1},
411 {&text[2], 1, 1, 2},
412 {&text[1], 1, 3, 1},
413 {&text[0], 1, 4, 1},
414 {&text[4], 1, 5, 2},
415 {&text[7], 1, 7, 1},
416 {&text[6], 1, 8, 2},
417 {&text[5], 1, 10, 1},
418 {nullptr, 0, 0, 0},
419 };
420 for (const auto& expectation : expectations) {
421 REPORTER_ASSERT(reporter, clusterator.next() == expectation);
422 }
423 }
424 {
425 constexpr unsigned len = 5;
426 const uint32_t clusters[len] = { 0, 1, 4, 5, 6 };
427 const SkGlyphID glyphs[len] = { 43, 167, 79, 79, 82, };
428 SkPoint pos[len] = {{0, 0}, {0, 0}, {0, 0}, {0, 0}, {0, 0}};
429 const char text[] = "Ha\xCC\x8A" "llo";
430 SkGlyphRun run = make_run(len, glyphs, pos, font, clusters, strlen(text), text);
431 SkClusterator clusterator(run);
432 SkClusterator::Cluster expectations[] = {
433 {&text[0], 1, 0, 1},
434 {&text[1], 3, 1, 1},
435 {&text[4], 1, 2, 1},
436 {&text[5], 1, 3, 1},
437 {&text[6], 1, 4, 1},
438 {nullptr, 0, 0, 0},
439 };
440 for (const auto& expectation : expectations) {
441 REPORTER_ASSERT(reporter, clusterator.next() == expectation);
442 }
443 }
444 }
445
DEF_TEST(fuzz875632f0,reporter)446 DEF_TEST(fuzz875632f0, reporter) {
447 SkNullWStream stream;
448 auto doc = SkPDF::MakeDocument(&stream);
449 REPORTER_ASSERT(reporter, doc);
450 SkCanvas* canvas = doc->beginPage(128, 160);
451
452 SkAutoCanvasRestore autoCanvasRestore(canvas, false);
453
454 SkPaint layerPaint({0, 0, 0, 0});
455 layerPaint.setImageFilter(SkDilateImageFilter::Make(536870912, 0, nullptr, nullptr));
456 layerPaint.setBlendMode(SkBlendMode::kClear);
457
458 canvas->saveLayer(nullptr, &layerPaint);
459 canvas->saveLayer(nullptr, nullptr);
460
461 SkPaint paint;
462 paint.setBlendMode(SkBlendMode::kDarken);
463 paint.setShader(SkPerlinNoiseShader::MakeFractalNoise(0, 0, 2, 0, nullptr));
464 paint.setColor4f(SkColor4f{0, 0, 0 ,0});
465
466 canvas->drawPath(SkPath(), paint);
467 }
468 #endif
469