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skia2/tests/PDFPrimitivesTest.cpp
halcanary 530032a18e SkPDF: in-place font subsetting 
Motivation: gross code simplification, also no bitset lookups at draw time.

SkPDFFont owns its glyph useage bitset.

SkPDFSubstituteMap goes away.

SkPDFObject interface is simplified.

SkPDFDocument tracks font usage (as hash set), not glyph usage.

SkPDFFont gets a simpler constructor.

SkPDFFont has first and last glyph set in constructor, not adjusted later.

SkPDFFont implementations are simplified.

SkPDFGlyphSet is replaced with simple SkBitSet.

SkPDFFont sizes its SkBitSets based on glyph count.

SkPDFGlyphSetMap goes away.

SkBitSet is now non-copyable.

SkBitSet now how utility methods to match old SkPDFGlyphSet.

GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2253283004

CQ_INCLUDE_TRYBOTS=master.client.skia:Test-Win-MSVC-GCE-CPU-AVX2-x86_64-Release-GDI-Trybot,Test-Win-MSVC-GCE-CPU-AVX2-x86_64-Debug-GDI-Trybot

Review-Url: https://codereview.chromium.org/2253283004
2016-08-18 14:22:52 -07:00

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/*
* 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 "Resources.h"
#include "SkBitmap.h"
#include "SkCanvas.h"
#include "SkData.h"
#include "SkDocument.h"
#include "SkDeflate.h"
#include "SkImageEncoder.h"
#include "SkMatrix.h"
#include "SkPDFCanon.h"
#include "SkPDFDevice.h"
#include "SkPDFFont.h"
#include "SkPDFTypes.h"
#include "SkPDFUtils.h"
#include "SkReadBuffer.h"
#include "SkScalar.h"
#include "SkSpecialImage.h"
#include "SkStream.h"
#include "SkTypes.h"
#include "Test.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";
std::unique_ptr<SkStreamAsset> streamData(new 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.copyToData());
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.addObject(a1.get());
objNumMap.addObject(a2.get());
objNumMap.addObject(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.addObject(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(SkDocument::MakePDF(&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.addObject(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.addObject(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(PDFPrimitives, 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_TO_STRING_OVERRIDE()
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);
}
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);
}
#ifndef SK_IGNORE_TO_STRING
void DummyImageFilter::toString(SkString* str) const {
str->appendf("DummyImageFilter: (");
str->append(")");
}
#endif
};
// Check that PDF rendering of image filters successfully falls back to
// CPU rasterization.
DEF_TEST(PDFImageFilter, reporter) {
SkDynamicMemoryWStream stream;
sk_sp<SkDocument> doc(SkDocument::MakePDF(&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.get());
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(PDFFontCanEmbedTypeface, 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(NULL, 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[SkPDFUtils::kMaximumFloatDecimalLength];
size_t len = SkPDFUtils::FloatToDecimal(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(PDFPrimitives_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(PDFPrimitives_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);
}
}
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