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/SkBlendMode.h"
13 #include "include/core/SkCanvas.h"
14 #include "include/core/SkColor.h"
15 #include "include/core/SkDocument.h"
16 #include "include/core/SkFlattenable.h"
17 #include "include/core/SkFont.h"
18 #include "include/core/SkFontStyle.h"
19 #include "include/core/SkFontTypes.h"
20 #include "include/core/SkImageFilter.h"
21 #include "include/core/SkPaint.h"
22 #include "include/core/SkPath.h"
23 #include "include/core/SkPoint.h"
24 #include "include/core/SkRect.h"
25 #include "include/core/SkRefCnt.h"
26 #include "include/core/SkScalar.h"
27 #include "include/core/SkSpan.h"
28 #include "include/core/SkStream.h"
29 #include "include/core/SkString.h"
30 #include "include/core/SkTypes.h"
31 #include "include/docs/SkPDFDocument.h"
32 #include "include/effects/SkImageFilters.h"
33 #include "include/effects/SkPerlinNoiseShader.h"
34 #include "include/private/base/SkDebug.h"
35 #include "include/private/base/SkFloatingPoint.h"
36 #include "include/private/base/SkTo.h"
37 #include "src/base/SkRandom.h"
38 #include "src/core/SkImageFilter_Base.h"
39 #include "src/core/SkReadBuffer.h"
40 #include "src/core/SkSpecialImage.h"
41 #include "src/pdf/SkClusterator.h"
42 #include "src/pdf/SkPDFDocumentPriv.h"
43 #include "src/pdf/SkPDFFont.h"
44 #include "src/pdf/SkPDFTypes.h"
45 #include "src/pdf/SkPDFUnion.h"
46 #include "src/pdf/SkPDFUtils.h"
47 #include "src/text/GlyphRun.h"
48 #include "src/utils/SkFloatToDecimal.h"
49 #include "tools/Resources.h"
50 #include "tools/ToolUtils.h"
51
52 #include <cfloat>
53 #include <cmath>
54 #include <cstdint>
55 #include <cstdio>
56 #include <cstdlib>
57 #include <cstring>
58 #include <memory>
59 #include <utility>
60
61 class SkTypeface;
62
63 template <typename T>
emit_to_string(T & obj)64 static SkString emit_to_string(T& obj) {
65 SkDynamicMemoryWStream buffer;
66 obj.emitObject(&buffer);
67 SkString tmp(buffer.bytesWritten());
68 buffer.copyTo(tmp.data());
69 return tmp;
70 }
71
eq(const SkString & str,const char * strPtr,size_t len)72 static bool eq(const SkString& str, const char* strPtr, size_t len) {
73 return len == str.size() && 0 == memcmp(str.c_str(), strPtr, len);
74 }
75
assert_eql(skiatest::Reporter * reporter,const SkString & skString,const char * str,size_t len)76 static void assert_eql(skiatest::Reporter* reporter,
77 const SkString& skString,
78 const char* str,
79 size_t len) {
80 if (!eq(skString, str, len)) {
81 REPORT_FAILURE(reporter, "", SkStringPrintf(
82 "'%*s' != '%s'", (int)len, str, skString.c_str()));
83 }
84 }
85
assert_eq(skiatest::Reporter * reporter,const SkString & skString,const char * str)86 static void assert_eq(skiatest::Reporter* reporter,
87 const SkString& skString,
88 const char* str) {
89 assert_eql(reporter, skString, str, strlen(str));
90 }
91
92
93 template <typename T>
assert_emit_eq(skiatest::Reporter * reporter,T & object,const char * string)94 static void assert_emit_eq(skiatest::Reporter* reporter,
95 T& object,
96 const char* string) {
97 SkString result = emit_to_string(object);
98 assert_eq(reporter, result, string);
99 }
100
101 // This test used to assert without the fix submitted for
102 // http://code.google.com/p/skia/issues/detail?id=1083.
103 // SKP files might have invalid glyph ids. This test ensures they are ignored,
104 // and there is no assert on input data in Debug mode.
test_issue1083()105 static void test_issue1083() {
106 SkDynamicMemoryWStream outStream;
107 auto doc = SkPDF::MakeDocument(&outStream);
108 SkCanvas* canvas = doc->beginPage(100.0f, 100.0f);
109
110 uint16_t glyphID = 65000;
111 canvas->drawSimpleText(&glyphID, 2, SkTextEncoding::kGlyphID, 0, 0, SkFont(), SkPaint());
112
113 doc->close();
114 }
115
assert_emit_eq_number(skiatest::Reporter * reporter,float number)116 static void assert_emit_eq_number(skiatest::Reporter* reporter, float number) {
117 SkPDFUnion pdfUnion = SkPDFUnion::Scalar(number);
118 SkString result = emit_to_string(pdfUnion);
119 float value = static_cast<float>(std::atof(result.c_str()));
120 if (value != number) {
121 ERRORF(reporter, "%.9g != %s", number, result.c_str());
122 }
123 }
124
125
TestPDFUnion(skiatest::Reporter * reporter)126 static void TestPDFUnion(skiatest::Reporter* reporter) {
127 SkPDFUnion boolTrue = SkPDFUnion::Bool(true);
128 assert_emit_eq(reporter, boolTrue, "true");
129
130 SkPDFUnion boolFalse = SkPDFUnion::Bool(false);
131 assert_emit_eq(reporter, boolFalse, "false");
132
133 SkPDFUnion int42 = SkPDFUnion::Int(42);
134 assert_emit_eq(reporter, int42, "42");
135
136 assert_emit_eq_number(reporter, SK_ScalarHalf);
137 assert_emit_eq_number(reporter, 110999.75f); // bigScalar
138 assert_emit_eq_number(reporter, 50000000.1f); // biggerScalar
139 assert_emit_eq_number(reporter, 1.0f / 65536); // smallScalar
140
141 SkPDFUnion stringSimple = SkPDFUnion::TextString("test ) string ( foo");
142 assert_emit_eq(reporter, stringSimple, "(test \\) string \\( foo)");
143
144 SkString stringComplexInput("\ttest ) string ( foo");
145 SkPDFUnion stringComplex = SkPDFUnion::TextString(stringComplexInput);
146 assert_emit_eq(reporter, stringComplex, "(\\011test \\) string \\( foo)");
147
148 SkString binaryStringInput("\1\2\3\4\5\6\7\10\11\12\13\14\15\16\17\20");
149 SkPDFUnion binaryString = SkPDFUnion::ByteString(binaryStringInput);
150 assert_emit_eq(reporter, binaryString, "<0102030405060708090A0B0C0D0E0F10>");
151
152 SkString nameInput("Test name\twith#tab");
153 SkPDFUnion name = SkPDFUnion::Name(nameInput);
154 assert_emit_eq(reporter, name, "/Test#20name#09with#23tab");
155
156 SkString nameInput2("A#/%()<>[]{}B");
157 SkPDFUnion name2 = SkPDFUnion::Name(nameInput2);
158 assert_emit_eq(reporter, name2, "/A#23#2F#25#28#29#3C#3E#5B#5D#7B#7DB");
159
160 SkPDFUnion name3 = SkPDFUnion::Name("SimpleNameWithOnlyPrintableASCII");
161 assert_emit_eq(reporter, name3, "/SimpleNameWithOnlyPrintableASCII");
162
163 // Test that we correctly handle characters with the high-bit set.
164 SkString highBitString("\xDE\xAD" "be\xEF");
165 SkPDFUnion highBitName = SkPDFUnion::Name(highBitString);
166 assert_emit_eq(reporter, highBitName, "/#DE#ADbe#EF");
167
168 // https://bugs.skia.org/9508
169 // https://crbug.com/494913
170 // Trailing '\0' characters must be removed.
171 const char nameInput4[] = "Test name with nil\0";
172 SkPDFUnion name4 = SkPDFUnion::Name(SkString(nameInput4, strlen(nameInput4) + 1));
173 assert_emit_eq(reporter, name4, "/Test#20name#20with#20nil");
174 }
175
TestPDFArray(skiatest::Reporter * reporter)176 static void TestPDFArray(skiatest::Reporter* reporter) {
177 std::unique_ptr<SkPDFArray> array(new SkPDFArray);
178 assert_emit_eq(reporter, *array, "[]");
179
180 array->appendInt(42);
181 assert_emit_eq(reporter, *array, "[42]");
182
183 array->appendScalar(SK_ScalarHalf);
184 assert_emit_eq(reporter, *array, "[42 .5]");
185
186 array->appendInt(0);
187 assert_emit_eq(reporter, *array, "[42 .5 0]");
188
189 array->appendBool(true);
190 assert_emit_eq(reporter, *array, "[42 .5 0 true]");
191
192 array->appendName("ThisName");
193 assert_emit_eq(reporter, *array, "[42 .5 0 true /ThisName]");
194
195 array->appendName(SkString("AnotherName"));
196 assert_emit_eq(reporter, *array, "[42 .5 0 true /ThisName /AnotherName]");
197
198 array->appendTextString("This String");
199 assert_emit_eq(reporter, *array,
200 "[42 .5 0 true /ThisName /AnotherName (This String)]");
201
202 array->appendByteString(SkString("Another String"));
203 assert_emit_eq(reporter, *array,
204 "[42 .5 0 true /ThisName /AnotherName (This String) "
205 "(Another String)]");
206
207 std::unique_ptr<SkPDFArray> innerArray(new SkPDFArray);
208 innerArray->appendInt(-1);
209 array->appendObject(std::move(innerArray));
210 assert_emit_eq(reporter, *array,
211 "[42 .5 0 true /ThisName /AnotherName (This String) "
212 "(Another String) [-1]]");
213 }
214
TestPDFDict(skiatest::Reporter * reporter)215 static void TestPDFDict(skiatest::Reporter* reporter) {
216 std::unique_ptr<SkPDFDict> dict(new SkPDFDict);
217 assert_emit_eq(reporter, *dict, "<<>>");
218
219 dict->insertInt("n1", SkToSizeT(42));
220 assert_emit_eq(reporter, *dict, "<</n1 42>>");
221
222 dict = std::make_unique<SkPDFDict>();
223 assert_emit_eq(reporter, *dict, "<<>>");
224
225 dict->insertInt("n1", 42);
226 assert_emit_eq(reporter, *dict, "<</n1 42>>");
227
228 dict->insertScalar("n2", SK_ScalarHalf);
229
230 SkString n3("n3");
231 std::unique_ptr<SkPDFArray> innerArray(new SkPDFArray);
232 innerArray->appendInt(-100);
233 dict->insertObject(n3, std::move(innerArray));
234 assert_emit_eq(reporter, *dict, "<</n1 42\n/n2 .5\n/n3 [-100]>>");
235
236 dict = std::make_unique<SkPDFDict>();
237 assert_emit_eq(reporter, *dict, "<<>>");
238
239 dict->insertInt("n1", 24);
240 assert_emit_eq(reporter, *dict, "<</n1 24>>");
241
242 dict->insertInt("n2", SkToSizeT(99));
243 assert_emit_eq(reporter, *dict, "<</n1 24\n/n2 99>>");
244
245 dict->insertScalar("n3", SK_ScalarHalf);
246 assert_emit_eq(reporter, *dict, "<</n1 24\n/n2 99\n/n3 .5>>");
247
248 dict->insertName("n4", "AName");
249 assert_emit_eq(reporter, *dict, "<</n1 24\n/n2 99\n/n3 .5\n/n4 /AName>>");
250
251 dict->insertName("n5", SkString("AnotherName"));
252 assert_emit_eq(reporter, *dict, "<</n1 24\n/n2 99\n/n3 .5\n/n4 /AName\n"
253 "/n5 /AnotherName>>");
254
255 dict->insertTextString("n6", "A String");
256 assert_emit_eq(reporter, *dict, "<</n1 24\n/n2 99\n/n3 .5\n/n4 /AName\n"
257 "/n5 /AnotherName\n/n6 (A String)>>");
258
259 dict->insertByteString("n7", SkString("Another String"));
260 assert_emit_eq(reporter, *dict, "<</n1 24\n/n2 99\n/n3 .5\n/n4 /AName\n"
261 "/n5 /AnotherName\n/n6 (A String)\n/n7 (Another String)>>");
262
263 dict = std::make_unique<SkPDFDict>("DType");
264 assert_emit_eq(reporter, *dict, "<</Type /DType>>");
265 }
266
DEF_TEST(SkPDF_Primitives,reporter)267 DEF_TEST(SkPDF_Primitives, reporter) {
268 TestPDFUnion(reporter);
269 TestPDFArray(reporter);
270 TestPDFDict(reporter);
271 test_issue1083();
272 }
273
274 namespace {
275
276 class TestImageFilter : public SkImageFilter_Base {
277 public:
Make(bool visited=false)278 static sk_sp<TestImageFilter> Make(bool visited = false) {
279 return sk_sp<TestImageFilter>(new TestImageFilter(visited));
280 }
281
visited() const282 bool visited() const { return fVisited; }
283
284 protected:
onFilterImage(const Context & ctx,SkIPoint * offset) const285 sk_sp<SkSpecialImage> onFilterImage(const Context& ctx, SkIPoint* offset) const override {
286 fVisited = true;
287 offset->fX = offset->fY = 0;
288 return sk_ref_sp<SkSpecialImage>(ctx.sourceImage());
289 }
290
291 private:
292 SK_FLATTENABLE_HOOKS(TestImageFilter)
TestImageFilter(bool visited)293 TestImageFilter(bool visited) : INHERITED(nullptr, 0, nullptr), fVisited(visited) {}
294
295 mutable bool fVisited;
296
297 using INHERITED = SkImageFilter_Base;
298 };
299
CreateProc(SkReadBuffer & buffer)300 sk_sp<SkFlattenable> TestImageFilter::CreateProc(SkReadBuffer& buffer) {
301 SK_IMAGEFILTER_UNFLATTEN_COMMON(common, 0);
302 bool visited = buffer.readBool();
303 return TestImageFilter::Make(visited);
304 }
305
306 } // namespace
307
308 // Check that PDF rendering of image filters successfully falls back to
309 // CPU rasterization.
DEF_TEST(SkPDF_ImageFilter,reporter)310 DEF_TEST(SkPDF_ImageFilter, reporter) {
311 REQUIRE_PDF_DOCUMENT(SkPDF_ImageFilter, reporter);
312 SkDynamicMemoryWStream stream;
313 auto doc = SkPDF::MakeDocument(&stream);
314 SkCanvas* canvas = doc->beginPage(100.0f, 100.0f);
315
316 sk_sp<TestImageFilter> filter(TestImageFilter::Make());
317
318 // Filter just created; should be unvisited.
319 REPORTER_ASSERT(reporter, !filter->visited());
320 SkPaint paint;
321 paint.setImageFilter(filter);
322 canvas->drawRect(SkRect::MakeWH(100, 100), paint);
323 doc->close();
324
325 // Filter was used in rendering; should be visited.
326 REPORTER_ASSERT(reporter, filter->visited());
327 }
328
329 // Check that PDF rendering of image filters successfully falls back to
330 // CPU rasterization.
DEF_TEST(SkPDF_FontCanEmbedTypeface,reporter)331 DEF_TEST(SkPDF_FontCanEmbedTypeface, reporter) {
332 SkNullWStream nullWStream;
333 SkPDFDocument doc(&nullWStream, SkPDF::Metadata());
334
335 const char resource[] = "fonts/Roboto2-Regular_NoEmbed.ttf";
336 sk_sp<SkTypeface> noEmbedTypeface(MakeResourceAsTypeface(resource));
337 if (noEmbedTypeface) {
338 REPORTER_ASSERT(reporter,
339 !SkPDFFont::CanEmbedTypeface(noEmbedTypeface.get(), &doc));
340 }
341 sk_sp<SkTypeface> portableTypeface(ToolUtils::create_portable_typeface(nullptr, SkFontStyle()));
342 REPORTER_ASSERT(reporter,
343 SkPDFFont::CanEmbedTypeface(portableTypeface.get(), &doc));
344 }
345
346
347 // test to see that all finite scalars round trip via scanf().
check_pdf_scalar_serialization(skiatest::Reporter * reporter,float inputFloat)348 static void check_pdf_scalar_serialization(
349 skiatest::Reporter* reporter, float inputFloat) {
350 char floatString[kMaximumSkFloatToDecimalLength];
351 size_t len = SkFloatToDecimal(inputFloat, floatString);
352 if (len >= sizeof(floatString)) {
353 ERRORF(reporter, "string too long: %u", (unsigned)len);
354 return;
355 }
356 if (floatString[len] != '\0' || strlen(floatString) != len) {
357 ERRORF(reporter, "terminator misplaced.");
358 return; // The terminator is needed for sscanf().
359 }
360 if (reporter->verbose()) {
361 SkDebugf("%15.9g = \"%s\"\n", inputFloat, floatString);
362 }
363 float roundTripFloat;
364 if (1 != sscanf(floatString, "%f", &roundTripFloat)) {
365 ERRORF(reporter, "unscannable result: %s", floatString);
366 return;
367 }
368 if (std::isfinite(inputFloat) && roundTripFloat != inputFloat) {
369 ERRORF(reporter, "roundTripFloat (%.9g) != inputFloat (%.9g)",
370 roundTripFloat, inputFloat);
371 }
372 }
373
374 // Test SkPDFUtils::AppendScalar for accuracy.
DEF_TEST(SkPDF_Primitives_Scalar,reporter)375 DEF_TEST(SkPDF_Primitives_Scalar, reporter) {
376 SkRandom random(0x5EED);
377 int iterationCount = 512;
378 while (iterationCount-- > 0) {
379 union { uint32_t u; float f; };
380 u = random.nextU();
381 static_assert(sizeof(float) == sizeof(uint32_t), "");
382 check_pdf_scalar_serialization(reporter, f);
383 }
384 float alwaysCheck[] = {
385 0.0f, -0.0f, 1.0f, -1.0f, SK_ScalarPI, 0.1f, FLT_MIN, FLT_MAX,
386 -FLT_MIN, -FLT_MAX, FLT_MIN / 16.0f, -FLT_MIN / 16.0f,
387 SK_FloatNaN, SK_FloatInfinity, SK_FloatNegativeInfinity,
388 -FLT_MIN / 8388608.0
389 };
390 for (float inputFloat: alwaysCheck) {
391 check_pdf_scalar_serialization(reporter, inputFloat);
392 }
393 }
394
395 // Test SkPDFUtils:: for accuracy.
DEF_TEST(SkPDF_Primitives_Color,reporter)396 DEF_TEST(SkPDF_Primitives_Color, reporter) {
397 char buffer[5];
398 for (int i = 0; i < 256; ++i) {
399 size_t len = SkPDFUtils::ColorToDecimal(i, buffer);
400 REPORTER_ASSERT(reporter, len == strlen(buffer));
401 float f;
402 REPORTER_ASSERT(reporter, 1 == sscanf(buffer, "%f", &f));
403 int roundTrip = (int)(0.5 + f * 255);
404 REPORTER_ASSERT(reporter, roundTrip == i);
405 }
406 }
407
make_run(size_t len,const SkGlyphID * glyphs,SkPoint * pos,const SkFont & font,const uint32_t * clusters,size_t utf8TextByteLength,const char * utf8Text)408 static sktext::GlyphRun make_run(size_t len, const SkGlyphID* glyphs, SkPoint* pos,
409 const SkFont& font, const uint32_t* clusters,
410 size_t utf8TextByteLength, const char* utf8Text) {
411 return sktext::GlyphRun(font,
412 SkSpan<const SkPoint>{pos, len},
413 SkSpan<const SkGlyphID>{glyphs, len},
414 SkSpan<const char>{utf8Text, utf8TextByteLength},
415 SkSpan<const uint32_t>{clusters, len},
416 SkSpan<const SkVector>{});
417 }
418
DEF_TEST(SkPDF_Clusterator,reporter)419 DEF_TEST(SkPDF_Clusterator, reporter) {
420 SkFont font;
421 {
422 constexpr unsigned len = 11;
423 const uint32_t clusters[len] = { 3, 2, 2, 1, 0, 4, 4, 7, 6, 6, 5 };
424 const SkGlyphID glyphs[len] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11};
425 SkPoint pos[len] = {{0, 0}, {0, 0}, {0, 0}, {0, 0}, {0, 0}, {0, 0},
426 {0, 0}, {0, 0}, {0, 0}, {0, 0}, {0, 0}};
427 const char text[] = "abcdefgh";
428 sktext::GlyphRun run = make_run(len, glyphs, pos, font, clusters, strlen(text), text);
429 SkClusterator clusterator(run);
430 SkClusterator::Cluster expectations[] = {
431 {&text[3], 1, 0, 1},
432 {&text[2], 1, 1, 2},
433 {&text[1], 1, 3, 1},
434 {&text[0], 1, 4, 1},
435 {&text[4], 1, 5, 2},
436 {&text[7], 1, 7, 1},
437 {&text[6], 1, 8, 2},
438 {&text[5], 1, 10, 1},
439 {nullptr, 0, 0, 0},
440 };
441 for (const auto& expectation : expectations) {
442 REPORTER_ASSERT(reporter, clusterator.next() == expectation);
443 }
444 }
445 {
446 constexpr unsigned len = 5;
447 const uint32_t clusters[len] = { 0, 1, 4, 5, 6 };
448 const SkGlyphID glyphs[len] = { 43, 167, 79, 79, 82, };
449 SkPoint pos[len] = {{0, 0}, {0, 0}, {0, 0}, {0, 0}, {0, 0}};
450 const char text[] = "Ha\xCC\x8A" "llo";
451 sktext::GlyphRun run = make_run(len, glyphs, pos, font, clusters, strlen(text), text);
452 SkClusterator clusterator(run);
453 SkClusterator::Cluster expectations[] = {
454 {&text[0], 1, 0, 1},
455 {&text[1], 3, 1, 1},
456 {&text[4], 1, 2, 1},
457 {&text[5], 1, 3, 1},
458 {&text[6], 1, 4, 1},
459 {nullptr, 0, 0, 0},
460 };
461 for (const auto& expectation : expectations) {
462 REPORTER_ASSERT(reporter, clusterator.next() == expectation);
463 }
464 }
465 }
466
DEF_TEST(fuzz875632f0,reporter)467 DEF_TEST(fuzz875632f0, reporter) {
468 SkNullWStream stream;
469 auto doc = SkPDF::MakeDocument(&stream);
470 REPORTER_ASSERT(reporter, doc);
471 SkCanvas* canvas = doc->beginPage(128, 160);
472
473 SkAutoCanvasRestore autoCanvasRestore(canvas, false);
474
475 SkPaint layerPaint({0, 0, 0, 0});
476 layerPaint.setImageFilter(SkImageFilters::Dilate(536870912, 0, nullptr, nullptr));
477 layerPaint.setBlendMode(SkBlendMode::kClear);
478
479 canvas->saveLayer(nullptr, &layerPaint);
480 canvas->saveLayer(nullptr, nullptr);
481
482 SkPaint paint;
483 paint.setBlendMode(SkBlendMode::kDarken);
484 paint.setShader(SkPerlinNoiseShader::MakeFractalNoise(0, 0, 2, 0, nullptr));
485 paint.setColor4f(SkColor4f{0, 0, 0 ,0});
486
487 canvas->drawPath(SkPath(), paint);
488 }
489 #endif
490