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skia2/tests/PDFPrimitivesTest.cpp
Hal Canary 3c36ef6be9 SkFloatToDecimal moved to src/utils 
This change stages SkFloatToDecimal() for possible re-use by pdfium.

Change-Id: Iedc0c78c8a633f0b0973365d2d8b540b5443590d
Reviewed-on: https://skia-review.googlesource.com/90400
Commit-Queue: Hal Canary <halcanary@google.com>
Reviewed-by: Cary Clark <caryclark@google.com>
2018-01-03 19:59:31 +00:00

497 lines
17 KiB
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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 "Test.h"
#ifdef SK_SUPPORT_PDF
#include "Resources.h"
#include "SkBitmap.h"
#include "SkCanvas.h"
#include "SkData.h"
#include "SkDocument.h"
#include "SkDeflate.h"
#include "SkImageEncoder.h"
#include "SkImageFilterPriv.h"
#include "SkMakeUnique.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 "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(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.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_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);
}
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);
}
#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(SkPDF_ImageFilter, reporter) {
REQUIRE_PDF_DOCUMENT(SkPDF_ImageFilter, 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);
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);
}
}
#endif
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