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skia2/tests/PDFPrimitivesTest.cpp
Herb Derby 022636b15a add RSXForm to SkGlyphRun 
RSXForm is not stored directly in the glyph run. The Tx and
Ty portions are stored in the positions, and the scos, and ssin
portions in a span of SkVector.

This CL just adds the space for the extra information, but does
not utilize it yet.

Change-Id: I93e2140fb28a6638a57b6d811ed6dc823e8de6ae
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/394217
Reviewed-by: Ben Wagner <bungeman@google.com>
Commit-Queue: Herb Derby <herb@google.com>
2021-04-08 19:50:45 +00:00

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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 "tests/Test.h"
#ifdef SK_SUPPORT_PDF
#include "include/core/SkBitmap.h"
#include "include/core/SkCanvas.h"
#include "include/core/SkData.h"
#include "include/core/SkImageEncoder.h"
#include "include/core/SkMatrix.h"
#include "include/core/SkScalar.h"
#include "include/core/SkStream.h"
#include "include/core/SkTypes.h"
#include "include/effects/SkImageFilters.h"
#include "include/effects/SkPerlinNoiseShader.h"
#include "include/private/SkTo.h"
#include "src/core/SkGlyphRun.h"
#include "src/core/SkImageFilter_Base.h"
#include "src/core/SkReadBuffer.h"
#include "src/core/SkSpecialImage.h"
#include "src/pdf/SkClusterator.h"
#include "src/pdf/SkDeflate.h"
#include "src/pdf/SkPDFDevice.h"
#include "src/pdf/SkPDFDocumentPriv.h"
#include "src/pdf/SkPDFFont.h"
#include "src/pdf/SkPDFTypes.h"
#include "src/pdf/SkPDFUnion.h"
#include "src/pdf/SkPDFUtils.h"
#include "tools/Resources.h"
#include "tools/ToolUtils.h"
#include <cstdlib>
#include <cmath>
#include <memory>
#define DUMMY_TEXT "DCT compessed stream."
template <typename T>
static SkString emit_to_string(T& obj) {
SkDynamicMemoryWStream buffer;
obj.emitObject(&buffer);
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'", (int)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);
}
// 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;
auto doc = SkPDF::MakeDocument(&outStream);
SkCanvas* canvas = doc->beginPage(100.0f, 100.0f);
uint16_t glyphID = 65000;
canvas->drawSimpleText(&glyphID, 2, SkTextEncoding::kGlyphID, 0, 0, SkFont(), SkPaint());
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");
// https://bugs.skia.org/9508
// https://crbug.com/494913
// Trailing '\0' characters must be removed.
const char nameInput4[] = "Test name with nil\0";
SkPDFUnion name4 = SkPDFUnion::Name(SkString(nameInput4, strlen(nameInput4) + 1));
assert_emit_eq(reporter, name4, "/Test#20name#20with#20nil");
}
static void TestPDFArray(skiatest::Reporter* reporter) {
std::unique_ptr<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)]");
std::unique_ptr<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]]");
}
static void TestPDFDict(skiatest::Reporter* reporter) {
std::unique_ptr<SkPDFDict> dict(new SkPDFDict);
assert_emit_eq(reporter, *dict, "<<>>");
dict->insertInt("n1", SkToSizeT(42));
assert_emit_eq(reporter, *dict, "<</n1 42>>");
dict = std::make_unique<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");
std::unique_ptr<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 = std::make_unique<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 = std::make_unique<SkPDFDict>("DType");
assert_emit_eq(reporter, *dict, "<</Type /DType>>");
}
DEF_TEST(SkPDF_Primitives, reporter) {
TestPDFUnion(reporter);
TestPDFArray(reporter);
TestPDFDict(reporter);
test_issue1083();
}
namespace {
class DummyImageFilter : public SkImageFilter_Base {
public:
static sk_sp<DummyImageFilter> Make(bool visited = false) {
return sk_sp<DummyImageFilter>(new DummyImageFilter(visited));
}
bool visited() const { return fVisited; }
protected:
sk_sp<SkSpecialImage> onFilterImage(const Context& ctx, SkIPoint* offset) const override {
fVisited = true;
offset->fX = offset->fY = 0;
return sk_ref_sp<SkSpecialImage>(ctx.sourceImage());
}
private:
SK_FLATTENABLE_HOOKS(DummyImageFilter)
DummyImageFilter(bool visited) : INHERITED(nullptr, 0, nullptr), fVisited(visited) {}
mutable bool fVisited;
using INHERITED = SkImageFilter_Base;
};
sk_sp<SkFlattenable> DummyImageFilter::CreateProc(SkReadBuffer& buffer) {
SK_IMAGEFILTER_UNFLATTEN_COMMON(common, 0);
bool visited = buffer.readBool();
return DummyImageFilter::Make(visited);
}
} // namespace
// 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;
auto 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) {
SkNullWStream nullWStream;
SkPDFDocument doc(&nullWStream, SkPDF::Metadata());
const char resource[] = "fonts/Roboto2-Regular_NoEmbed.ttf";
sk_sp<SkTypeface> noEmbedTypeface(MakeResourceAsTypeface(resource));
if (noEmbedTypeface) {
REPORTER_ASSERT(reporter,
!SkPDFFont::CanEmbedTypeface(noEmbedTypeface.get(), &doc));
}
sk_sp<SkTypeface> portableTypeface(ToolUtils::create_portable_typeface(nullptr, SkFontStyle()));
REPORTER_ASSERT(reporter,
SkPDFFont::CanEmbedTypeface(portableTypeface.get(), &doc));
}
// 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,
const SkFont& font, const uint32_t* clusters,
size_t utf8TextByteLength, const char* utf8Text) {
return SkGlyphRun(font,
SkSpan<const SkPoint>{pos, len},
SkSpan<const SkGlyphID>{glyphs, len},
SkSpan<const char>{utf8Text, utf8TextByteLength},
SkSpan<const uint32_t>{clusters, len},
SkSpan<const SkVector>{});
}
DEF_TEST(SkPDF_Clusterator, reporter) {
SkFont font;
{
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, font, 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, font, 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);
}
}
}
DEF_TEST(fuzz875632f0, reporter) {
SkNullWStream stream;
auto doc = SkPDF::MakeDocument(&stream);
REPORTER_ASSERT(reporter, doc);
SkCanvas* canvas = doc->beginPage(128, 160);
SkAutoCanvasRestore autoCanvasRestore(canvas, false);
SkPaint layerPaint({0, 0, 0, 0});
layerPaint.setImageFilter(SkImageFilters::Dilate(536870912, 0, nullptr, nullptr));
layerPaint.setBlendMode(SkBlendMode::kClear);
canvas->saveLayer(nullptr, &layerPaint);
canvas->saveLayer(nullptr, nullptr);
SkPaint paint;
paint.setBlendMode(SkBlendMode::kDarken);
paint.setShader(SkPerlinNoiseShader::MakeFractalNoise(0, 0, 2, 0, nullptr));
paint.setColor4f(SkColor4f{0, 0, 0 ,0});
canvas->drawPath(SkPath(), paint);
}
#endif
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