tests/PDFPrimitivesTest.cpp - platform/external/skia - Gitiles

 /*
  * Copyright 2010 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */

 #include "Test.h"

 #ifdef SK_SUPPORT_PDF

 #include "Resources.h"
 #include "SkBitmap.h"
 #include "SkCanvas.h"
 #include "SkClusterator.h"
 #include "SkData.h"
 #include "SkDeflate.h"
 #include "SkGlyphRun.h"
 #include "SkImageEncoder.h"
 #include "SkImageFilterPriv.h"
 #include "SkMakeUnique.h"
 #include "SkMatrix.h"
 #include "SkPDFCanon.h"
 #include "SkPDFDevice.h"
 #include "SkPDFDocument.h"
 #include "SkPDFFont.h"
 #include "SkPDFTypes.h"
 #include "SkPDFUtils.h"
 #include "SkReadBuffer.h"
 #include "SkScalar.h"
 #include "SkSpecialImage.h"
 #include "SkStream.h"
 #include "SkTo.h"
 #include "SkTypes.h"
 #include "sk_tool_utils.h"

 #include <cstdlib>
 #include <cmath>

 #define DUMMY_TEXT "DCT compessed stream."

 template <typename T>
 static SkString emit_to_string(T& obj, SkPDFObjNumMap* catPtr = nullptr) {
     SkPDFObjNumMap catalog;
     SkDynamicMemoryWStream buffer;
     if (!catPtr) {
         catPtr = &catalog;
     }
     obj.emitObject(&buffer, *catPtr);
     SkString tmp(buffer.bytesWritten());
     buffer.copyTo(tmp.writable_str());
     return tmp;
 }

 static bool eq(const SkString& str, const char* strPtr, size_t len) {
     return len == str.size() && 0 == memcmp(str.c_str(), strPtr, len);
 }

 static void assert_eql(skiatest::Reporter* reporter,
                        const SkString& skString,
                        const char* str,
                        size_t len) {
     if (!eq(skString, str, len)) {
         REPORT_FAILURE(reporter, "", SkStringPrintf(
                 "'%*s' != '%s'", len, str, skString.c_str()));
     }
 }

 static void assert_eq(skiatest::Reporter* reporter,
                       const SkString& skString,
                       const char* str) {
     assert_eql(reporter, skString, str, strlen(str));
 }


 template <typename T>
 static void assert_emit_eq(skiatest::Reporter* reporter,
                            T& object,
                            const char* string) {
     SkString result = emit_to_string(object);
     assert_eq(reporter, result, string);
 }

 static void TestPDFStream(skiatest::Reporter* reporter) {
     char streamBytes[] = "Test\nFoo\tBar";
     auto streamData = skstd::make_unique<SkMemoryStream>(
             streamBytes, strlen(streamBytes), true);
     auto stream = sk_make_sp<SkPDFStream>(std::move(streamData));
     assert_emit_eq(reporter,
                    *stream,
                    "<</Length 12>> stream\nTest\nFoo\tBar\nendstream");
     stream->dict()->insertInt("Attribute", 42);
     assert_emit_eq(reporter,
                    *stream,
                    "<</Length 12\n/Attribute 42>> stream\n"
                    "Test\nFoo\tBar\nendstream");

     {
         char streamBytes2[] = "This is a longer string, so that compression "
                               "can do something with it. With shorter strings, "
                               "the short circuit logic cuts in and we end up "
                               "with an uncompressed string.";
         auto stream = sk_make_sp<SkPDFStream>(
                 SkData::MakeWithCopy(streamBytes2, strlen(streamBytes2)));

         SkDynamicMemoryWStream compressedByteStream;
         SkDeflateWStream deflateWStream(&compressedByteStream);
         deflateWStream.write(streamBytes2, strlen(streamBytes2));
         deflateWStream.finalize();

         SkDynamicMemoryWStream expected;
         expected.writeText("<</Filter /FlateDecode\n/Length 116>> stream\n");
         compressedByteStream.writeToStream(&expected);
         compressedByteStream.reset();
         expected.writeText("\nendstream");
         sk_sp<SkData> expectedResultData2(expected.detachAsData());
         SkString result = emit_to_string(*stream);
         #ifndef SK_PDF_LESS_COMPRESSION
         assert_eql(reporter,
                    result,
                    (const char*)expectedResultData2->data(),
                    expectedResultData2->size());
         #endif
     }
 }

 static void TestObjectNumberMap(skiatest::Reporter* reporter) {
     SkPDFObjNumMap objNumMap;
     sk_sp<SkPDFArray> a1(new SkPDFArray);
     sk_sp<SkPDFArray> a2(new SkPDFArray);
     sk_sp<SkPDFArray> a3(new SkPDFArray);

     objNumMap.addObjectRecursively(a1.get());
     objNumMap.addObjectRecursively(a2.get());
     objNumMap.addObjectRecursively(a3.get());

     // The objects should be numbered in the order they are added,
     // starting with 1.
     REPORTER_ASSERT(reporter, objNumMap.getObjectNumber(a1.get()) == 1);
     REPORTER_ASSERT(reporter, objNumMap.getObjectNumber(a2.get()) == 2);
     REPORTER_ASSERT(reporter, objNumMap.getObjectNumber(a3.get()) == 3);
     // Assert that repeated calls to get the object number return
     // consistent result.
     REPORTER_ASSERT(reporter, objNumMap.getObjectNumber(a1.get()) == 1);
 }

 static void TestObjectRef(skiatest::Reporter* reporter) {
     sk_sp<SkPDFArray> a1(new SkPDFArray);
     sk_sp<SkPDFArray> a2(new SkPDFArray);
     a2->appendObjRef(a1);

     SkPDFObjNumMap catalog;
     catalog.addObjectRecursively(a1.get());
     REPORTER_ASSERT(reporter, catalog.getObjectNumber(a1.get()) == 1);

     SkString result = emit_to_string(*a2, &catalog);
     // If appendObjRef misbehaves, then the result would
     // be [[]], not [1 0 R].
     assert_eq(reporter, result, "[1 0 R]");
 }

 // This test used to assert without the fix submitted for
 // http://code.google.com/p/skia/issues/detail?id=1083.
 // SKP files might have invalid glyph ids. This test ensures they are ignored,
 // and there is no assert on input data in Debug mode.
 static void test_issue1083() {
     SkDynamicMemoryWStream outStream;
     sk_sp<SkDocument> doc(SkPDF::MakeDocument(&outStream));
     SkCanvas* canvas = doc->beginPage(100.0f, 100.0f);
     SkPaint paint;
     paint.setTextEncoding(SkPaint::kGlyphID_TextEncoding);

     uint16_t glyphID = 65000;
     canvas->drawText(&glyphID, 2, 0, 0, paint);

     doc->close();
 }

 static void assert_emit_eq_number(skiatest::Reporter* reporter, float number) {
     SkPDFUnion pdfUnion = SkPDFUnion::Scalar(number);
     SkString result = emit_to_string(pdfUnion);
     float value = static_cast<float>(std::atof(result.c_str()));
     if (value != number) {
         ERRORF(reporter, "%.9g != %s", number, result.c_str());
     }
 }


 static void TestPDFUnion(skiatest::Reporter* reporter) {
     SkPDFUnion boolTrue = SkPDFUnion::Bool(true);
     assert_emit_eq(reporter, boolTrue, "true");

     SkPDFUnion boolFalse = SkPDFUnion::Bool(false);
     assert_emit_eq(reporter, boolFalse, "false");

     SkPDFUnion int42 = SkPDFUnion::Int(42);
     assert_emit_eq(reporter, int42, "42");

     assert_emit_eq_number(reporter, SK_ScalarHalf);
     assert_emit_eq_number(reporter, 110999.75f);  // bigScalar
     assert_emit_eq_number(reporter, 50000000.1f);  // biggerScalar
     assert_emit_eq_number(reporter, 1.0f / 65536);  // smallScalar

     SkPDFUnion stringSimple = SkPDFUnion::String("test ) string ( foo");
     assert_emit_eq(reporter, stringSimple, "(test \\) string \\( foo)");

     SkString stringComplexInput("\ttest ) string ( foo");
     SkPDFUnion stringComplex = SkPDFUnion::String(stringComplexInput);
     assert_emit_eq(reporter, stringComplex, "(\\011test \\) string \\( foo)");

     SkString binaryStringInput("\1\2\3\4\5\6\7\10\11\12\13\14\15\16\17\20");
     SkPDFUnion binaryString = SkPDFUnion::String(binaryStringInput);
     assert_emit_eq(reporter, binaryString, "<0102030405060708090A0B0C0D0E0F10>");

     SkString nameInput("Test name\twith#tab");
     SkPDFUnion name = SkPDFUnion::Name(nameInput);
     assert_emit_eq(reporter, name, "/Test#20name#09with#23tab");

     SkString nameInput2("A#/%()<>[]{}B");
     SkPDFUnion name2 = SkPDFUnion::Name(nameInput2);
     assert_emit_eq(reporter, name2, "/A#23#2F#25#28#29#3C#3E#5B#5D#7B#7DB");

     SkPDFUnion name3 = SkPDFUnion::Name("SimpleNameWithOnlyPrintableASCII");
     assert_emit_eq(reporter, name3, "/SimpleNameWithOnlyPrintableASCII");

     // Test that we correctly handle characters with the high-bit set.
     SkString highBitString("\xDE\xAD" "be\xEF");
     SkPDFUnion highBitName = SkPDFUnion::Name(highBitString);
     assert_emit_eq(reporter, highBitName, "/#DE#ADbe#EF");
 }

 static void TestPDFArray(skiatest::Reporter* reporter) {
     sk_sp<SkPDFArray> array(new SkPDFArray);
     assert_emit_eq(reporter, *array, "[]");

     array->appendInt(42);
     assert_emit_eq(reporter, *array, "[42]");

     array->appendScalar(SK_ScalarHalf);
     assert_emit_eq(reporter, *array, "[42 .5]");

     array->appendInt(0);
     assert_emit_eq(reporter, *array, "[42 .5 0]");

     array->appendBool(true);
     assert_emit_eq(reporter, *array, "[42 .5 0 true]");

     array->appendName("ThisName");
     assert_emit_eq(reporter, *array, "[42 .5 0 true /ThisName]");

     array->appendName(SkString("AnotherName"));
     assert_emit_eq(reporter, *array, "[42 .5 0 true /ThisName /AnotherName]");

     array->appendString("This String");
     assert_emit_eq(reporter, *array,
                    "[42 .5 0 true /ThisName /AnotherName (This String)]");

     array->appendString(SkString("Another String"));
     assert_emit_eq(reporter, *array,
                    "[42 .5 0 true /ThisName /AnotherName (This String) "
                    "(Another String)]");

     sk_sp<SkPDFArray> innerArray(new SkPDFArray);
     innerArray->appendInt(-1);
     array->appendObject(std::move(innerArray));
     assert_emit_eq(reporter, *array,
                    "[42 .5 0 true /ThisName /AnotherName (This String) "
                    "(Another String) [-1]]");

     sk_sp<SkPDFArray> referencedArray(new SkPDFArray);
     SkPDFObjNumMap catalog;
     catalog.addObjectRecursively(referencedArray.get());
     REPORTER_ASSERT(reporter, catalog.getObjectNumber(
                             referencedArray.get()) == 1);
     array->appendObjRef(std::move(referencedArray));

     SkString result = emit_to_string(*array, &catalog);
     assert_eq(reporter, result,
               "[42 .5 0 true /ThisName /AnotherName (This String) "
               "(Another String) [-1] 1 0 R]");
 }

 static void TestPDFDict(skiatest::Reporter* reporter) {
     sk_sp<SkPDFDict> dict(new SkPDFDict);
     assert_emit_eq(reporter, *dict, "<<>>");

     dict->insertInt("n1", SkToSizeT(42));
     assert_emit_eq(reporter, *dict, "<</n1 42>>");

     dict.reset(new SkPDFDict);
     assert_emit_eq(reporter, *dict, "<<>>");

     dict->insertInt("n1", 42);
     assert_emit_eq(reporter, *dict, "<</n1 42>>");

     dict->insertScalar("n2", SK_ScalarHalf);

     SkString n3("n3");
     sk_sp<SkPDFArray> innerArray(new SkPDFArray);
     innerArray->appendInt(-100);
     dict->insertObject(n3, std::move(innerArray));
     assert_emit_eq(reporter, *dict, "<</n1 42\n/n2 .5\n/n3 [-100]>>");

     dict.reset(new SkPDFDict);
     assert_emit_eq(reporter, *dict, "<<>>");

     dict->insertInt("n1", 24);
     assert_emit_eq(reporter, *dict, "<</n1 24>>");

     dict->insertInt("n2", SkToSizeT(99));
     assert_emit_eq(reporter, *dict, "<</n1 24\n/n2 99>>");

     dict->insertScalar("n3", SK_ScalarHalf);
     assert_emit_eq(reporter, *dict, "<</n1 24\n/n2 99\n/n3 .5>>");

     dict->insertName("n4", "AName");
     assert_emit_eq(reporter, *dict, "<</n1 24\n/n2 99\n/n3 .5\n/n4 /AName>>");

     dict->insertName("n5", SkString("AnotherName"));
     assert_emit_eq(reporter, *dict, "<</n1 24\n/n2 99\n/n3 .5\n/n4 /AName\n"
                    "/n5 /AnotherName>>");

     dict->insertString("n6", "A String");
     assert_emit_eq(reporter, *dict, "<</n1 24\n/n2 99\n/n3 .5\n/n4 /AName\n"
                    "/n5 /AnotherName\n/n6 (A String)>>");

     dict->insertString("n7", SkString("Another String"));
     assert_emit_eq(reporter, *dict, "<</n1 24\n/n2 99\n/n3 .5\n/n4 /AName\n"
                    "/n5 /AnotherName\n/n6 (A String)\n/n7 (Another String)>>");

     dict.reset(new SkPDFDict("DType"));
     assert_emit_eq(reporter, *dict, "<</Type /DType>>");

     sk_sp<SkPDFArray> referencedArray(new SkPDFArray);
     SkPDFObjNumMap catalog;
     catalog.addObjectRecursively(referencedArray.get());
     REPORTER_ASSERT(reporter, catalog.getObjectNumber(
                             referencedArray.get()) == 1);
     dict->insertObjRef("n1", std::move(referencedArray));
     SkString result = emit_to_string(*dict, &catalog);
     assert_eq(reporter, result, "<</Type /DType\n/n1 1 0 R>>");
 }

 DEF_TEST(SkPDF_Primitives, reporter) {
     TestPDFUnion(reporter);
     TestPDFArray(reporter);
     TestPDFDict(reporter);
     TestPDFStream(reporter);
     TestObjectNumberMap(reporter);
     TestObjectRef(reporter);
     test_issue1083();
 }

 namespace {

 class DummyImageFilter : public SkImageFilter {
 public:
     static sk_sp<DummyImageFilter> Make(bool visited = false) {
         return sk_sp<DummyImageFilter>(new DummyImageFilter(visited));
     }

     SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(DummyImageFilter)
     bool visited() const { return fVisited; }

 protected:
     sk_sp<SkSpecialImage> onFilterImage(SkSpecialImage* source, const Context&,
                                         SkIPoint* offset) const override {
         fVisited = true;
         offset->fX = offset->fY = 0;
         return sk_ref_sp<SkSpecialImage>(source);
     }
     sk_sp<SkImageFilter> onMakeColorSpace(SkColorSpaceXformer*) const override {
         return sk_ref_sp(const_cast<DummyImageFilter*>(this));
     }

 private:
     DummyImageFilter(bool visited) : INHERITED(nullptr, 0, nullptr), fVisited(visited) {}

     mutable bool fVisited;

     typedef SkImageFilter INHERITED;
 };

 sk_sp<SkFlattenable> DummyImageFilter::CreateProc(SkReadBuffer& buffer) {
     SK_IMAGEFILTER_UNFLATTEN_COMMON(common, 0);
     bool visited = buffer.readBool();
     return DummyImageFilter::Make(visited);
 }

 };

 // Check that PDF rendering of image filters successfully falls back to
 // CPU rasterization.
 DEF_TEST(SkPDF_ImageFilter, reporter) {
     REQUIRE_PDF_DOCUMENT(SkPDF_ImageFilter, reporter);
     SkDynamicMemoryWStream stream;
     sk_sp<SkDocument> doc(SkPDF::MakeDocument(&stream));
     SkCanvas* canvas = doc->beginPage(100.0f, 100.0f);

     sk_sp<DummyImageFilter> filter(DummyImageFilter::Make());

     // Filter just created; should be unvisited.
     REPORTER_ASSERT(reporter, !filter->visited());
     SkPaint paint;
     paint.setImageFilter(filter);
     canvas->drawRect(SkRect::MakeWH(100, 100), paint);
     doc->close();

     // Filter was used in rendering; should be visited.
     REPORTER_ASSERT(reporter, filter->visited());
 }

 // Check that PDF rendering of image filters successfully falls back to
 // CPU rasterization.
 DEF_TEST(SkPDF_FontCanEmbedTypeface, reporter) {
     SkPDFCanon canon;

     const char resource[] = "fonts/Roboto2-Regular_NoEmbed.ttf";
     sk_sp<SkTypeface> noEmbedTypeface(MakeResourceAsTypeface(resource));
     if (noEmbedTypeface) {
         REPORTER_ASSERT(reporter,
                         !SkPDFFont::CanEmbedTypeface(noEmbedTypeface.get(), &canon));
     }
     sk_sp<SkTypeface> portableTypeface(
             sk_tool_utils::create_portable_typeface(nullptr, SkFontStyle()));
     REPORTER_ASSERT(reporter,
                     SkPDFFont::CanEmbedTypeface(portableTypeface.get(), &canon));
 }


 // test to see that all finite scalars round trip via scanf().
 static void check_pdf_scalar_serialization(
         skiatest::Reporter* reporter, float inputFloat) {
     char floatString[kMaximumSkFloatToDecimalLength];
     size_t len = SkFloatToDecimal(inputFloat, floatString);
     if (len >= sizeof(floatString)) {
         ERRORF(reporter, "string too long: %u", (unsigned)len);
         return;
     }
     if (floatString[len] != '\0' || strlen(floatString) != len) {
         ERRORF(reporter, "terminator misplaced.");
         return;  // The terminator is needed for sscanf().
     }
     if (reporter->verbose()) {
         SkDebugf("%15.9g = \"%s\"\n", inputFloat, floatString);
     }
     float roundTripFloat;
     if (1 != sscanf(floatString, "%f", &roundTripFloat)) {
         ERRORF(reporter, "unscannable result: %s", floatString);
         return;
     }
     if (std::isfinite(inputFloat) && roundTripFloat != inputFloat) {
         ERRORF(reporter, "roundTripFloat (%.9g) != inputFloat (%.9g)",
                roundTripFloat, inputFloat);
     }
 }

 // Test SkPDFUtils::AppendScalar for accuracy.
 DEF_TEST(SkPDF_Primitives_Scalar, reporter) {
     SkRandom random(0x5EED);
     int iterationCount = 512;
     while (iterationCount-- > 0) {
         union { uint32_t u; float f; };
         u = random.nextU();
         static_assert(sizeof(float) == sizeof(uint32_t), "");
         check_pdf_scalar_serialization(reporter, f);
     }
     float alwaysCheck[] = {
         0.0f, -0.0f, 1.0f, -1.0f, SK_ScalarPI, 0.1f, FLT_MIN, FLT_MAX,
         -FLT_MIN, -FLT_MAX, FLT_MIN / 16.0f, -FLT_MIN / 16.0f,
         SK_FloatNaN, SK_FloatInfinity, SK_FloatNegativeInfinity,
         -FLT_MIN / 8388608.0
     };
     for (float inputFloat: alwaysCheck) {
         check_pdf_scalar_serialization(reporter, inputFloat);
     }
 }

 // Test SkPDFUtils:: for accuracy.
 DEF_TEST(SkPDF_Primitives_Color, reporter) {
     char buffer[5];
     for (int i = 0; i < 256; ++i) {
         size_t len = SkPDFUtils::ColorToDecimal(i, buffer);
         REPORTER_ASSERT(reporter, len == strlen(buffer));
         float f;
         REPORTER_ASSERT(reporter, 1 == sscanf(buffer, "%f", &f));
         int roundTrip = (int)(0.5 + f * 255);
         REPORTER_ASSERT(reporter, roundTrip == i);
     }
 }

 static SkGlyphRun make_run(size_t len, const SkGlyphID* glyphs, SkPoint* pos,
                            SkPaint paint, const uint32_t* clusters,
                            size_t utf8TextByteLength, const char* utf8Text) {
     return SkGlyphRun(std::move(paint),
                       SkSpan<const uint16_t>{},  // No dense indices for now.
                       SkSpan<const SkPoint>{pos, len},
                       SkSpan<const SkGlyphID>{glyphs, len},
                       SkSpan<const SkGlyphID>{},
                       SkSpan<const char>{utf8Text, utf8TextByteLength},
                       SkSpan<const uint32_t>{clusters, len});
 }

 DEF_TEST(SkPDF_Clusterator, reporter) {
     SkPaint paint;
     paint.setTextEncoding(SkPaint::kGlyphID_TextEncoding);
     {
         constexpr unsigned len = 11;
         const uint32_t clusters[len] = { 3, 2, 2, 1, 0, 4, 4, 7, 6, 6, 5 };
         const SkGlyphID glyphs[len] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11};
         SkPoint pos[len] = {{0, 0}, {0, 0}, {0, 0}, {0, 0}, {0, 0}, {0, 0},
                                   {0, 0}, {0, 0}, {0, 0}, {0, 0}, {0, 0}};
         const char text[] = "abcdefgh";
         SkGlyphRun run = make_run(len, glyphs, pos, paint, clusters, strlen(text), text);
         SkClusterator clusterator(run);
         SkClusterator::Cluster expectations[] = {
             {&text[3], 1, 0, 1},
             {&text[2], 1, 1, 2},
             {&text[1], 1, 3, 1},
             {&text[0], 1, 4, 1},
             {&text[4], 1, 5, 2},
             {&text[7], 1, 7, 1},
             {&text[6], 1, 8, 2},
             {&text[5], 1, 10, 1},
             {nullptr, 0, 0, 0},
         };
         for (const auto& expectation : expectations) {
             REPORTER_ASSERT(reporter, clusterator.next() == expectation);
         }
     }
     {
         constexpr unsigned len = 5;
         const uint32_t clusters[len] = { 0, 1, 4, 5, 6 };
         const SkGlyphID glyphs[len] = { 43, 167, 79, 79, 82, };
         SkPoint pos[len] = {{0, 0}, {0, 0}, {0, 0}, {0, 0}, {0, 0}};
         const char text[] = "Ha\xCC\x8A" "llo";
         SkGlyphRun run = make_run(len, glyphs, pos, paint, clusters, strlen(text), text);
         SkClusterator clusterator(run);
         SkClusterator::Cluster expectations[] = {
             {&text[0], 1, 0, 1},
             {&text[1], 3, 1, 1},
             {&text[4], 1, 2, 1},
             {&text[5], 1, 3, 1},
             {&text[6], 1, 4, 1},
             {nullptr, 0, 0, 0},
         };
         for (const auto& expectation : expectations) {
             REPORTER_ASSERT(reporter, clusterator.next() == expectation);
         }
     }
 }

 #endif
	/*
	* Copyright 2010 The Android Open Source Project
	*
	* Use of this source code is governed by a BSD-style license that can be
	* found in the LICENSE file.
	*/

	#include "Test.h"

	#ifdef SK_SUPPORT_PDF

	#include "Resources.h"
	#include "SkBitmap.h"
	#include "SkCanvas.h"
	#include "SkClusterator.h"
	#include "SkData.h"
	#include "SkDeflate.h"
	#include "SkGlyphRun.h"
	#include "SkImageEncoder.h"
	#include "SkImageFilterPriv.h"
	#include "SkMakeUnique.h"
	#include "SkMatrix.h"
	#include "SkPDFCanon.h"
	#include "SkPDFDevice.h"
	#include "SkPDFDocument.h"
	#include "SkPDFFont.h"
	#include "SkPDFTypes.h"
	#include "SkPDFUtils.h"
	#include "SkReadBuffer.h"
	#include "SkScalar.h"
	#include "SkSpecialImage.h"
	#include "SkStream.h"
	#include "SkTo.h"
	#include "SkTypes.h"
	#include "sk_tool_utils.h"

	#include <cstdlib>
	#include <cmath>

	#define DUMMY_TEXT "DCT compessed stream."

	template <typename T>
	static SkString emit_to_string(T& obj, SkPDFObjNumMap* catPtr = nullptr) {
	SkPDFObjNumMap catalog;
	SkDynamicMemoryWStream buffer;
	if (!catPtr) {
	catPtr = &catalog;
	}
	obj.emitObject(&buffer, *catPtr);
	SkString tmp(buffer.bytesWritten());
	buffer.copyTo(tmp.writable_str());
	return tmp;
	}

	static bool eq(const SkString& str, const char* strPtr, size_t len) {
	return len == str.size() && 0 == memcmp(str.c_str(), strPtr, len);
	}

	static void assert_eql(skiatest::Reporter* reporter,
	const SkString& skString,
	const char* str,
	size_t len) {
	if (!eq(skString, str, len)) {
	REPORT_FAILURE(reporter, "", SkStringPrintf(
	"'%*s' != '%s'", len, str, skString.c_str()));
	}
	}

	static void assert_eq(skiatest::Reporter* reporter,
	const SkString& skString,
	const char* str) {
	assert_eql(reporter, skString, str, strlen(str));
	}


	template <typename T>
	static void assert_emit_eq(skiatest::Reporter* reporter,
	T& object,
	const char* string) {
	SkString result = emit_to_string(object);
	assert_eq(reporter, result, string);
	}

	static void TestPDFStream(skiatest::Reporter* reporter) {
	char streamBytes[] = "Test\nFoo\tBar";
	auto streamData = skstd::make_unique<SkMemoryStream>(
	streamBytes, strlen(streamBytes), true);
	auto stream = sk_make_sp<SkPDFStream>(std::move(streamData));
	assert_emit_eq(reporter,
	*stream,
	"<</Length 12>> stream\nTest\nFoo\tBar\nendstream");
	stream->dict()->insertInt("Attribute", 42);
	assert_emit_eq(reporter,
	*stream,
	"<</Length 12\n/Attribute 42>> stream\n"
	"Test\nFoo\tBar\nendstream");

	{
	char streamBytes2[] = "This is a longer string, so that compression "
	"can do something with it. With shorter strings, "
	"the short circuit logic cuts in and we end up "
	"with an uncompressed string.";
	auto stream = sk_make_sp<SkPDFStream>(
	SkData::MakeWithCopy(streamBytes2, strlen(streamBytes2)));

	SkDynamicMemoryWStream compressedByteStream;
	SkDeflateWStream deflateWStream(&compressedByteStream);
	deflateWStream.write(streamBytes2, strlen(streamBytes2));
	deflateWStream.finalize();

	SkDynamicMemoryWStream expected;
	expected.writeText("<</Filter /FlateDecode\n/Length 116>> stream\n");
	compressedByteStream.writeToStream(&expected);
	compressedByteStream.reset();
	expected.writeText("\nendstream");
	sk_sp<SkData> expectedResultData2(expected.detachAsData());
	SkString result = emit_to_string(*stream);
	#ifndef SK_PDF_LESS_COMPRESSION
	assert_eql(reporter,
	result,
	(const char*)expectedResultData2->data(),
	expectedResultData2->size());
	#endif
	}
	}

	static void TestObjectNumberMap(skiatest::Reporter* reporter) {
	SkPDFObjNumMap objNumMap;
	sk_sp<SkPDFArray> a1(new SkPDFArray);
	sk_sp<SkPDFArray> a2(new SkPDFArray);
	sk_sp<SkPDFArray> a3(new SkPDFArray);

	objNumMap.addObjectRecursively(a1.get());
	objNumMap.addObjectRecursively(a2.get());
	objNumMap.addObjectRecursively(a3.get());

	// The objects should be numbered in the order they are added,
	// starting with 1.
	REPORTER_ASSERT(reporter, objNumMap.getObjectNumber(a1.get()) == 1);
	REPORTER_ASSERT(reporter, objNumMap.getObjectNumber(a2.get()) == 2);
	REPORTER_ASSERT(reporter, objNumMap.getObjectNumber(a3.get()) == 3);
	// Assert that repeated calls to get the object number return
	// consistent result.
	REPORTER_ASSERT(reporter, objNumMap.getObjectNumber(a1.get()) == 1);
	}

	static void TestObjectRef(skiatest::Reporter* reporter) {
	sk_sp<SkPDFArray> a1(new SkPDFArray);
	sk_sp<SkPDFArray> a2(new SkPDFArray);
	a2->appendObjRef(a1);

	SkPDFObjNumMap catalog;
	catalog.addObjectRecursively(a1.get());
	REPORTER_ASSERT(reporter, catalog.getObjectNumber(a1.get()) == 1);

	SkString result = emit_to_string(*a2, &catalog);
	// If appendObjRef misbehaves, then the result would
	// be [[]], not [1 0 R].
	assert_eq(reporter, result, "[1 0 R]");
	}

	// This test used to assert without the fix submitted for
	// http://code.google.com/p/skia/issues/detail?id=1083.
	// SKP files might have invalid glyph ids. This test ensures they are ignored,
	// and there is no assert on input data in Debug mode.
	static void test_issue1083() {
	SkDynamicMemoryWStream outStream;
	sk_sp<SkDocument> doc(SkPDF::MakeDocument(&outStream));
	SkCanvas* canvas = doc->beginPage(100.0f, 100.0f);
	SkPaint paint;
	paint.setTextEncoding(SkPaint::kGlyphID_TextEncoding);

	uint16_t glyphID = 65000;
	canvas->drawText(&glyphID, 2, 0, 0, paint);

	doc->close();
	}

	static void assert_emit_eq_number(skiatest::Reporter* reporter, float number) {
	SkPDFUnion pdfUnion = SkPDFUnion::Scalar(number);
	SkString result = emit_to_string(pdfUnion);
	float value = static_cast<float>(std::atof(result.c_str()));
	if (value != number) {
	ERRORF(reporter, "%.9g != %s", number, result.c_str());
	}
	}


	static void TestPDFUnion(skiatest::Reporter* reporter) {
	SkPDFUnion boolTrue = SkPDFUnion::Bool(true);
	assert_emit_eq(reporter, boolTrue, "true");

	SkPDFUnion boolFalse = SkPDFUnion::Bool(false);
	assert_emit_eq(reporter, boolFalse, "false");

	SkPDFUnion int42 = SkPDFUnion::Int(42);
	assert_emit_eq(reporter, int42, "42");

	assert_emit_eq_number(reporter, SK_ScalarHalf);
	assert_emit_eq_number(reporter, 110999.75f); // bigScalar
	assert_emit_eq_number(reporter, 50000000.1f); // biggerScalar
	assert_emit_eq_number(reporter, 1.0f / 65536); // smallScalar

	SkPDFUnion stringSimple = SkPDFUnion::String("test ) string ( foo");
	assert_emit_eq(reporter, stringSimple, "(test \\) string \\( foo)");

	SkString stringComplexInput("\ttest ) string ( foo");
	SkPDFUnion stringComplex = SkPDFUnion::String(stringComplexInput);
	assert_emit_eq(reporter, stringComplex, "(\\011test \\) string \\( foo)");

	SkString binaryStringInput("\1\2\3\4\5\6\7\10\11\12\13\14\15\16\17\20");
	SkPDFUnion binaryString = SkPDFUnion::String(binaryStringInput);
	assert_emit_eq(reporter, binaryString, "<0102030405060708090A0B0C0D0E0F10>");

	SkString nameInput("Test name\twith#tab");
	SkPDFUnion name = SkPDFUnion::Name(nameInput);
	assert_emit_eq(reporter, name, "/Test#20name#09with#23tab");

	SkString nameInput2("A#/%()<>[]{}B");
	SkPDFUnion name2 = SkPDFUnion::Name(nameInput2);
	assert_emit_eq(reporter, name2, "/A#23#2F#25#28#29#3C#3E#5B#5D#7B#7DB");

	SkPDFUnion name3 = SkPDFUnion::Name("SimpleNameWithOnlyPrintableASCII");
	assert_emit_eq(reporter, name3, "/SimpleNameWithOnlyPrintableASCII");

	// Test that we correctly handle characters with the high-bit set.
	SkString highBitString("\xDE\xAD" "be\xEF");
	SkPDFUnion highBitName = SkPDFUnion::Name(highBitString);
	assert_emit_eq(reporter, highBitName, "/#DE#ADbe#EF");
	}

	static void TestPDFArray(skiatest::Reporter* reporter) {
	sk_sp<SkPDFArray> array(new SkPDFArray);
	assert_emit_eq(reporter, *array, "[]");

	array->appendInt(42);
	assert_emit_eq(reporter, *array, "[42]");

	array->appendScalar(SK_ScalarHalf);
	assert_emit_eq(reporter, *array, "[42 .5]");

	array->appendInt(0);
	assert_emit_eq(reporter, *array, "[42 .5 0]");

	array->appendBool(true);
	assert_emit_eq(reporter, *array, "[42 .5 0 true]");

	array->appendName("ThisName");
	assert_emit_eq(reporter, *array, "[42 .5 0 true /ThisName]");

	array->appendName(SkString("AnotherName"));
	assert_emit_eq(reporter, *array, "[42 .5 0 true /ThisName /AnotherName]");

	array->appendString("This String");
	assert_emit_eq(reporter, *array,
	"[42 .5 0 true /ThisName /AnotherName (This String)]");

	array->appendString(SkString("Another String"));
	assert_emit_eq(reporter, *array,
	"[42 .5 0 true /ThisName /AnotherName (This String) "
	"(Another String)]");

	sk_sp<SkPDFArray> innerArray(new SkPDFArray);
	innerArray->appendInt(-1);
	array->appendObject(std::move(innerArray));
	assert_emit_eq(reporter, *array,
	"[42 .5 0 true /ThisName /AnotherName (This String) "
	"(Another String) [-1]]");

	sk_sp<SkPDFArray> referencedArray(new SkPDFArray);
	SkPDFObjNumMap catalog;
	catalog.addObjectRecursively(referencedArray.get());
	REPORTER_ASSERT(reporter, catalog.getObjectNumber(
	referencedArray.get()) == 1);
	array->appendObjRef(std::move(referencedArray));

	SkString result = emit_to_string(*array, &catalog);
	assert_eq(reporter, result,
	"[42 .5 0 true /ThisName /AnotherName (This String) "
	"(Another String) [-1] 1 0 R]");
	}

	static void TestPDFDict(skiatest::Reporter* reporter) {
	sk_sp<SkPDFDict> dict(new SkPDFDict);
	assert_emit_eq(reporter, *dict, "<<>>");

	dict->insertInt("n1", SkToSizeT(42));
	assert_emit_eq(reporter, *dict, "<</n1 42>>");

	dict.reset(new SkPDFDict);
	assert_emit_eq(reporter, *dict, "<<>>");

	dict->insertInt("n1", 42);
	assert_emit_eq(reporter, *dict, "<</n1 42>>");

	dict->insertScalar("n2", SK_ScalarHalf);

	SkString n3("n3");
	sk_sp<SkPDFArray> innerArray(new SkPDFArray);
	innerArray->appendInt(-100);
	dict->insertObject(n3, std::move(innerArray));
	assert_emit_eq(reporter, *dict, "<</n1 42\n/n2 .5\n/n3 [-100]>>");

	dict.reset(new SkPDFDict);
	assert_emit_eq(reporter, *dict, "<<>>");

	dict->insertInt("n1", 24);
	assert_emit_eq(reporter, *dict, "<</n1 24>>");

	dict->insertInt("n2", SkToSizeT(99));
	assert_emit_eq(reporter, *dict, "<</n1 24\n/n2 99>>");

	dict->insertScalar("n3", SK_ScalarHalf);
	assert_emit_eq(reporter, *dict, "<</n1 24\n/n2 99\n/n3 .5>>");

	dict->insertName("n4", "AName");
	assert_emit_eq(reporter, *dict, "<</n1 24\n/n2 99\n/n3 .5\n/n4 /AName>>");

	dict->insertName("n5", SkString("AnotherName"));
	assert_emit_eq(reporter, *dict, "<</n1 24\n/n2 99\n/n3 .5\n/n4 /AName\n"
	"/n5 /AnotherName>>");

	dict->insertString("n6", "A String");
	assert_emit_eq(reporter, *dict, "<</n1 24\n/n2 99\n/n3 .5\n/n4 /AName\n"
	"/n5 /AnotherName\n/n6 (A String)>>");

	dict->insertString("n7", SkString("Another String"));
	assert_emit_eq(reporter, *dict, "<</n1 24\n/n2 99\n/n3 .5\n/n4 /AName\n"
	"/n5 /AnotherName\n/n6 (A String)\n/n7 (Another String)>>");

	dict.reset(new SkPDFDict("DType"));
	assert_emit_eq(reporter, *dict, "<</Type /DType>>");

	sk_sp<SkPDFArray> referencedArray(new SkPDFArray);
	SkPDFObjNumMap catalog;
	catalog.addObjectRecursively(referencedArray.get());
	REPORTER_ASSERT(reporter, catalog.getObjectNumber(
	referencedArray.get()) == 1);
	dict->insertObjRef("n1", std::move(referencedArray));
	SkString result = emit_to_string(*dict, &catalog);
	assert_eq(reporter, result, "<</Type /DType\n/n1 1 0 R>>");
	}

	DEF_TEST(SkPDF_Primitives, reporter) {
	TestPDFUnion(reporter);
	TestPDFArray(reporter);
	TestPDFDict(reporter);
	TestPDFStream(reporter);
	TestObjectNumberMap(reporter);
	TestObjectRef(reporter);
	test_issue1083();
	}

	namespace {

	class DummyImageFilter : public SkImageFilter {
	public:
	static sk_sp<DummyImageFilter> Make(bool visited = false) {
	return sk_sp<DummyImageFilter>(new DummyImageFilter(visited));
	}

	SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(DummyImageFilter)
	bool visited() const { return fVisited; }

	protected:
	sk_sp<SkSpecialImage> onFilterImage(SkSpecialImage* source, const Context&,
	SkIPoint* offset) const override {
	fVisited = true;
	offset->fX = offset->fY = 0;
	return sk_ref_sp<SkSpecialImage>(source);
	}
	sk_sp<SkImageFilter> onMakeColorSpace(SkColorSpaceXformer*) const override {
	return sk_ref_sp(const_cast<DummyImageFilter*>(this));
	}

	private:
	DummyImageFilter(bool visited) : INHERITED(nullptr, 0, nullptr), fVisited(visited) {}

	mutable bool fVisited;

	typedef SkImageFilter INHERITED;
	};

	sk_sp<SkFlattenable> DummyImageFilter::CreateProc(SkReadBuffer& buffer) {
	SK_IMAGEFILTER_UNFLATTEN_COMMON(common, 0);
	bool visited = buffer.readBool();
	return DummyImageFilter::Make(visited);
	}

	};

	// Check that PDF rendering of image filters successfully falls back to
	// CPU rasterization.
	DEF_TEST(SkPDF_ImageFilter, reporter) {
	REQUIRE_PDF_DOCUMENT(SkPDF_ImageFilter, reporter);
	SkDynamicMemoryWStream stream;
	sk_sp<SkDocument> doc(SkPDF::MakeDocument(&stream));
	SkCanvas* canvas = doc->beginPage(100.0f, 100.0f);

	sk_sp<DummyImageFilter> filter(DummyImageFilter::Make());

	// Filter just created; should be unvisited.
	REPORTER_ASSERT(reporter, !filter->visited());
	SkPaint paint;
	paint.setImageFilter(filter);
	canvas->drawRect(SkRect::MakeWH(100, 100), paint);
	doc->close();

	// Filter was used in rendering; should be visited.
	REPORTER_ASSERT(reporter, filter->visited());
	}

	// Check that PDF rendering of image filters successfully falls back to
	// CPU rasterization.
	DEF_TEST(SkPDF_FontCanEmbedTypeface, reporter) {
	SkPDFCanon canon;

	const char resource[] = "fonts/Roboto2-Regular_NoEmbed.ttf";
	sk_sp<SkTypeface> noEmbedTypeface(MakeResourceAsTypeface(resource));
	if (noEmbedTypeface) {
	REPORTER_ASSERT(reporter,
	!SkPDFFont::CanEmbedTypeface(noEmbedTypeface.get(), &canon));
	}
	sk_sp<SkTypeface> portableTypeface(
	sk_tool_utils::create_portable_typeface(nullptr, SkFontStyle()));
	REPORTER_ASSERT(reporter,
	SkPDFFont::CanEmbedTypeface(portableTypeface.get(), &canon));
	}


	// test to see that all finite scalars round trip via scanf().
	static void check_pdf_scalar_serialization(
	skiatest::Reporter* reporter, float inputFloat) {
	char floatString[kMaximumSkFloatToDecimalLength];
	size_t len = SkFloatToDecimal(inputFloat, floatString);
	if (len >= sizeof(floatString)) {
	ERRORF(reporter, "string too long: %u", (unsigned)len);
	return;
	}
	if (floatString[len] != '\0' \|\| strlen(floatString) != len) {
	ERRORF(reporter, "terminator misplaced.");
	return; // The terminator is needed for sscanf().
	}
	if (reporter->verbose()) {
	SkDebugf("%15.9g = \"%s\"\n", inputFloat, floatString);
	}
	float roundTripFloat;
	if (1 != sscanf(floatString, "%f", &roundTripFloat)) {
	ERRORF(reporter, "unscannable result: %s", floatString);
	return;
	}
	if (std::isfinite(inputFloat) && roundTripFloat != inputFloat) {
	ERRORF(reporter, "roundTripFloat (%.9g) != inputFloat (%.9g)",
	roundTripFloat, inputFloat);
	}
	}

	// Test SkPDFUtils::AppendScalar for accuracy.
	DEF_TEST(SkPDF_Primitives_Scalar, reporter) {
	SkRandom random(0x5EED);
	int iterationCount = 512;
	while (iterationCount-- > 0) {
	union { uint32_t u; float f; };
	u = random.nextU();
	static_assert(sizeof(float) == sizeof(uint32_t), "");
	check_pdf_scalar_serialization(reporter, f);
	}
	float alwaysCheck[] = {
	0.0f, -0.0f, 1.0f, -1.0f, SK_ScalarPI, 0.1f, FLT_MIN, FLT_MAX,
	-FLT_MIN, -FLT_MAX, FLT_MIN / 16.0f, -FLT_MIN / 16.0f,
	SK_FloatNaN, SK_FloatInfinity, SK_FloatNegativeInfinity,
	-FLT_MIN / 8388608.0
	};
	for (float inputFloat: alwaysCheck) {
	check_pdf_scalar_serialization(reporter, inputFloat);
	}
	}

	// Test SkPDFUtils:: for accuracy.
	DEF_TEST(SkPDF_Primitives_Color, reporter) {
	char buffer[5];
	for (int i = 0; i < 256; ++i) {
	size_t len = SkPDFUtils::ColorToDecimal(i, buffer);
	REPORTER_ASSERT(reporter, len == strlen(buffer));
	float f;
	REPORTER_ASSERT(reporter, 1 == sscanf(buffer, "%f", &f));
	int roundTrip = (int)(0.5 + f * 255);
	REPORTER_ASSERT(reporter, roundTrip == i);
	}
	}

	static SkGlyphRun make_run(size_t len, const SkGlyphID* glyphs, SkPoint* pos,
	SkPaint paint, const uint32_t* clusters,
	size_t utf8TextByteLength, const char* utf8Text) {
	return SkGlyphRun(std::move(paint),
	SkSpan<const uint16_t>{}, // No dense indices for now.
	SkSpan<const SkPoint>{pos, len},
	SkSpan<const SkGlyphID>{glyphs, len},
	SkSpan<const SkGlyphID>{},
	SkSpan<const char>{utf8Text, utf8TextByteLength},
	SkSpan<const uint32_t>{clusters, len});
	}

	DEF_TEST(SkPDF_Clusterator, reporter) {
	SkPaint paint;
	paint.setTextEncoding(SkPaint::kGlyphID_TextEncoding);
	{
	constexpr unsigned len = 11;
	const uint32_t clusters[len] = { 3, 2, 2, 1, 0, 4, 4, 7, 6, 6, 5 };
	const SkGlyphID glyphs[len] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11};
	SkPoint pos[len] = {{0, 0}, {0, 0}, {0, 0}, {0, 0}, {0, 0}, {0, 0},
	{0, 0}, {0, 0}, {0, 0}, {0, 0}, {0, 0}};
	const char text[] = "abcdefgh";
	SkGlyphRun run = make_run(len, glyphs, pos, paint, clusters, strlen(text), text);
	SkClusterator clusterator(run);
	SkClusterator::Cluster expectations[] = {
	{&text[3], 1, 0, 1},
	{&text[2], 1, 1, 2},
	{&text[1], 1, 3, 1},
	{&text[0], 1, 4, 1},
	{&text[4], 1, 5, 2},
	{&text[7], 1, 7, 1},
	{&text[6], 1, 8, 2},
	{&text[5], 1, 10, 1},
	{nullptr, 0, 0, 0},
	};
	for (const auto& expectation : expectations) {
	REPORTER_ASSERT(reporter, clusterator.next() == expectation);
	}
	}
	{
	constexpr unsigned len = 5;
	const uint32_t clusters[len] = { 0, 1, 4, 5, 6 };
	const SkGlyphID glyphs[len] = { 43, 167, 79, 79, 82, };
	SkPoint pos[len] = {{0, 0}, {0, 0}, {0, 0}, {0, 0}, {0, 0}};
	const char text[] = "Ha\xCC\x8A" "llo";
	SkGlyphRun run = make_run(len, glyphs, pos, paint, clusters, strlen(text), text);
	SkClusterator clusterator(run);
	SkClusterator::Cluster expectations[] = {
	{&text[0], 1, 0, 1},
	{&text[1], 3, 1, 1},
	{&text[4], 1, 2, 1},
	{&text[5], 1, 3, 1},
	{&text[6], 1, 4, 1},
	{nullptr, 0, 0, 0},
	};
	for (const auto& expectation : expectations) {
	REPORTER_ASSERT(reporter, clusterator.next() == expectation);
	}
	}
	}

	#endif