56586b6f3d
* do a lot less floating-point math by converting to
an integer as early as possible [faster].
* round rather than truncate.
* use 8 significant digits rather than 9 when possible.
* remove trailing zeros in fractions.
before:
0.12 ! PDFScalar nonrendering
after:
0.07 ! PDFScalar nonrendering
Accuracy guaranteed by existing unit test.
Example diffs:
-/Shading <</Function <</C0 [.321568638 .333333343 .321568638]
+/Shading <</Function <</C0 [.32156864 .33333334 .32156864]
-/C1 [.258823543 .270588248 .258823543]
+/C1 [.25882354 .27058825 .25882354]
-1 0 0 -1 20 120.394500 Tm
+1 0 0 -1 20 120.394501 Tm
-1 0 0 -1 20 184.789001 Tm
+1 0 0 -1 20 184.789 Tm
-291.503997 0 l
+291.504 0 l
BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2146103004
Review-Url: https://codereview.chromium.org/2146103004
511 lines
18 KiB
C++
511 lines
18 KiB
C++
/*
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* Copyright 2010 The Android Open Source Project
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#include "Resources.h"
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#include "SkBitmap.h"
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#include "SkCanvas.h"
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#include "SkData.h"
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#include "SkDocument.h"
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#include "SkDeflate.h"
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#include "SkImageEncoder.h"
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#include "SkMatrix.h"
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#include "SkPDFCanon.h"
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#include "SkPDFDevice.h"
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#include "SkPDFFont.h"
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#include "SkPDFStream.h"
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#include "SkPDFTypes.h"
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#include "SkPDFUtils.h"
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#include "SkReadBuffer.h"
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#include "SkScalar.h"
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#include "SkSpecialImage.h"
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#include "SkStream.h"
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#include "SkTypes.h"
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#include "Test.h"
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#include "sk_tool_utils.h"
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#include <cstdlib>
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#include <cmath>
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#define DUMMY_TEXT "DCT compessed stream."
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namespace {
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struct Catalog {
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SkPDFSubstituteMap substitutes;
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SkPDFObjNumMap numbers;
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};
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} // namespace
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template <typename T>
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static SkString emit_to_string(T& obj, Catalog* catPtr = nullptr) {
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Catalog catalog;
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SkDynamicMemoryWStream buffer;
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if (!catPtr) {
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catPtr = &catalog;
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}
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obj.emitObject(&buffer, catPtr->numbers, catPtr->substitutes);
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SkString tmp(buffer.bytesWritten());
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buffer.copyTo(tmp.writable_str());
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return tmp;
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}
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static bool eq(const SkString& str, const char* strPtr, size_t len) {
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return len == str.size() && 0 == memcmp(str.c_str(), strPtr, len);
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}
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static void assert_eql(skiatest::Reporter* reporter,
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const SkString& skString,
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const char* str,
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size_t len) {
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if (!eq(skString, str, len)) {
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REPORT_FAILURE(reporter, "", SkStringPrintf(
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"'%*s' != '%s'", len, str, skString.c_str()));
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}
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}
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static void assert_eq(skiatest::Reporter* reporter,
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const SkString& skString,
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const char* str) {
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assert_eql(reporter, skString, str, strlen(str));
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}
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template <typename T>
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static void assert_emit_eq(skiatest::Reporter* reporter,
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T& object,
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const char* string) {
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SkString result = emit_to_string(object);
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assert_eq(reporter, result, string);
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}
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static void TestPDFStream(skiatest::Reporter* reporter) {
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char streamBytes[] = "Test\nFoo\tBar";
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SkAutoTDelete<SkMemoryStream> streamData(new SkMemoryStream(
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streamBytes, strlen(streamBytes), true));
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sk_sp<SkPDFStream> stream(new SkPDFStream(streamData.get()));
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assert_emit_eq(reporter,
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*stream,
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"<</Length 12>> stream\nTest\nFoo\tBar\nendstream");
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stream->insertInt("Attribute", 42);
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assert_emit_eq(reporter,
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*stream,
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"<</Length 12\n/Attribute 42>> stream\n"
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"Test\nFoo\tBar\nendstream");
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{
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char streamBytes2[] = "This is a longer string, so that compression "
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"can do something with it. With shorter strings, "
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"the short circuit logic cuts in and we end up "
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"with an uncompressed string.";
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SkAutoDataUnref streamData2(SkData::NewWithCopy(streamBytes2,
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strlen(streamBytes2)));
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sk_sp<SkPDFStream> stream(new SkPDFStream(streamData2.get()));
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SkDynamicMemoryWStream compressedByteStream;
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SkDeflateWStream deflateWStream(&compressedByteStream);
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deflateWStream.write(streamBytes2, strlen(streamBytes2));
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deflateWStream.finalize();
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SkDynamicMemoryWStream expected;
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expected.writeText("<</Filter /FlateDecode\n/Length 116>> stream\n");
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compressedByteStream.writeToStream(&expected);
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compressedByteStream.reset();
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expected.writeText("\nendstream");
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SkAutoDataUnref expectedResultData2(expected.copyToData());
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SkString result = emit_to_string(*stream);
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assert_eql(reporter,
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result,
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(const char*)expectedResultData2->data(),
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expectedResultData2->size());
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}
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}
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static void TestObjectNumberMap(skiatest::Reporter* reporter) {
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SkPDFObjNumMap objNumMap;
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sk_sp<SkPDFArray> a1(new SkPDFArray);
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sk_sp<SkPDFArray> a2(new SkPDFArray);
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sk_sp<SkPDFArray> a3(new SkPDFArray);
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objNumMap.addObject(a1.get());
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objNumMap.addObject(a2.get());
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objNumMap.addObject(a3.get());
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// The objects should be numbered in the order they are added,
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// starting with 1.
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REPORTER_ASSERT(reporter, objNumMap.getObjectNumber(a1.get()) == 1);
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REPORTER_ASSERT(reporter, objNumMap.getObjectNumber(a2.get()) == 2);
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REPORTER_ASSERT(reporter, objNumMap.getObjectNumber(a3.get()) == 3);
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// Assert that repeated calls to get the object number return
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// consistent result.
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REPORTER_ASSERT(reporter, objNumMap.getObjectNumber(a1.get()) == 1);
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}
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static void TestObjectRef(skiatest::Reporter* reporter) {
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sk_sp<SkPDFArray> a1(new SkPDFArray);
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sk_sp<SkPDFArray> a2(new SkPDFArray);
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a2->appendObjRef(a1);
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Catalog catalog;
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catalog.numbers.addObject(a1.get());
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REPORTER_ASSERT(reporter, catalog.numbers.getObjectNumber(a1.get()) == 1);
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SkString result = emit_to_string(*a2, &catalog);
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// If appendObjRef misbehaves, then the result would
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// be [[]], not [1 0 R].
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assert_eq(reporter, result, "[1 0 R]");
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}
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static void TestSubstitute(skiatest::Reporter* reporter) {
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sk_sp<SkPDFDict> proxy(new SkPDFDict());
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sk_sp<SkPDFDict> stub(new SkPDFDict());
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proxy->insertInt("Value", 33);
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stub->insertInt("Value", 44);
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SkPDFSubstituteMap substituteMap;
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substituteMap.setSubstitute(proxy.get(), stub.get());
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SkPDFObjNumMap catalog;
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catalog.addObject(proxy.get());
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REPORTER_ASSERT(reporter, stub.get() == substituteMap.getSubstitute(proxy.get()));
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REPORTER_ASSERT(reporter, proxy.get() != substituteMap.getSubstitute(stub.get()));
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}
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// This test used to assert without the fix submitted for
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// http://code.google.com/p/skia/issues/detail?id=1083.
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// SKP files might have invalid glyph ids. This test ensures they are ignored,
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// and there is no assert on input data in Debug mode.
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static void test_issue1083() {
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SkDynamicMemoryWStream outStream;
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sk_sp<SkDocument> doc(SkDocument::MakePDF(&outStream));
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SkCanvas* canvas = doc->beginPage(100.0f, 100.0f);
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SkPaint paint;
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paint.setTextEncoding(SkPaint::kGlyphID_TextEncoding);
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uint16_t glyphID = 65000;
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canvas->drawText(&glyphID, 2, 0, 0, paint);
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doc->close();
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}
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static void assert_emit_eq_number(skiatest::Reporter* reporter, float number) {
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SkPDFUnion pdfUnion = SkPDFUnion::Scalar(number);
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SkString result = emit_to_string(pdfUnion);
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float value = static_cast<float>(std::atof(result.c_str()));
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if (value != number) {
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ERRORF(reporter, "%.9g != %s", number, result.c_str());
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}
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}
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static void TestPDFUnion(skiatest::Reporter* reporter) {
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SkPDFUnion boolTrue = SkPDFUnion::Bool(true);
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assert_emit_eq(reporter, boolTrue, "true");
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SkPDFUnion boolFalse = SkPDFUnion::Bool(false);
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assert_emit_eq(reporter, boolFalse, "false");
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SkPDFUnion int42 = SkPDFUnion::Int(42);
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assert_emit_eq(reporter, int42, "42");
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assert_emit_eq_number(reporter, SK_ScalarHalf);
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assert_emit_eq_number(reporter, 110999.75f); // bigScalar
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assert_emit_eq_number(reporter, 50000000.1f); // biggerScalar
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assert_emit_eq_number(reporter, 1.0f / 65536); // smallScalar
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SkPDFUnion stringSimple = SkPDFUnion::String("test ) string ( foo");
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assert_emit_eq(reporter, stringSimple, "(test \\) string \\( foo)");
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SkString stringComplexInput("\ttest ) string ( foo");
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SkPDFUnion stringComplex = SkPDFUnion::String(stringComplexInput);
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assert_emit_eq(reporter, stringComplex, "(\\011test \\) string \\( foo)");
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SkString binaryStringInput("\1\2\3\4\5\6\7\10\11\12\13\14\15\16\17\20");
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SkPDFUnion binaryString = SkPDFUnion::String(binaryStringInput);
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assert_emit_eq(reporter, binaryString, "<0102030405060708090A0B0C0D0E0F10>");
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SkString nameInput("Test name\twith#tab");
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SkPDFUnion name = SkPDFUnion::Name(nameInput);
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assert_emit_eq(reporter, name, "/Test#20name#09with#23tab");
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SkString nameInput2("A#/%()<>[]{}B");
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SkPDFUnion name2 = SkPDFUnion::Name(nameInput2);
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assert_emit_eq(reporter, name2, "/A#23#2F#25#28#29#3C#3E#5B#5D#7B#7DB");
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SkPDFUnion name3 = SkPDFUnion::Name("SimpleNameWithOnlyPrintableASCII");
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assert_emit_eq(reporter, name3, "/SimpleNameWithOnlyPrintableASCII");
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// Test that we correctly handle characters with the high-bit set.
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SkString highBitString("\xDE\xAD" "be\xEF");
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SkPDFUnion highBitName = SkPDFUnion::Name(highBitString);
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assert_emit_eq(reporter, highBitName, "/#DE#ADbe#EF");
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}
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static void TestPDFArray(skiatest::Reporter* reporter) {
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sk_sp<SkPDFArray> array(new SkPDFArray);
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assert_emit_eq(reporter, *array, "[]");
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array->appendInt(42);
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assert_emit_eq(reporter, *array, "[42]");
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array->appendScalar(SK_ScalarHalf);
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assert_emit_eq(reporter, *array, "[42 .5]");
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array->appendInt(0);
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assert_emit_eq(reporter, *array, "[42 .5 0]");
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array->appendBool(true);
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assert_emit_eq(reporter, *array, "[42 .5 0 true]");
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array->appendName("ThisName");
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assert_emit_eq(reporter, *array, "[42 .5 0 true /ThisName]");
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array->appendName(SkString("AnotherName"));
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assert_emit_eq(reporter, *array, "[42 .5 0 true /ThisName /AnotherName]");
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array->appendString("This String");
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assert_emit_eq(reporter, *array,
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"[42 .5 0 true /ThisName /AnotherName (This String)]");
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array->appendString(SkString("Another String"));
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assert_emit_eq(reporter, *array,
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"[42 .5 0 true /ThisName /AnotherName (This String) "
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"(Another String)]");
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sk_sp<SkPDFArray> innerArray(new SkPDFArray);
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innerArray->appendInt(-1);
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array->appendObject(std::move(innerArray));
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assert_emit_eq(reporter, *array,
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"[42 .5 0 true /ThisName /AnotherName (This String) "
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"(Another String) [-1]]");
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sk_sp<SkPDFArray> referencedArray(new SkPDFArray);
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Catalog catalog;
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catalog.numbers.addObject(referencedArray.get());
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REPORTER_ASSERT(reporter, catalog.numbers.getObjectNumber(
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referencedArray.get()) == 1);
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array->appendObjRef(std::move(referencedArray));
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SkString result = emit_to_string(*array, &catalog);
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assert_eq(reporter, result,
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"[42 .5 0 true /ThisName /AnotherName (This String) "
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"(Another String) [-1] 1 0 R]");
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}
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static void TestPDFDict(skiatest::Reporter* reporter) {
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sk_sp<SkPDFDict> dict(new SkPDFDict);
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assert_emit_eq(reporter, *dict, "<<>>");
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dict->insertInt("n1", SkToSizeT(42));
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assert_emit_eq(reporter, *dict, "<</n1 42>>");
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dict.reset(new SkPDFDict);
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assert_emit_eq(reporter, *dict, "<<>>");
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dict->insertInt("n1", 42);
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assert_emit_eq(reporter, *dict, "<</n1 42>>");
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dict->insertScalar("n2", SK_ScalarHalf);
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SkString n3("n3");
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sk_sp<SkPDFArray> innerArray(new SkPDFArray);
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innerArray->appendInt(-100);
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dict->insertObject(n3, std::move(innerArray));
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assert_emit_eq(reporter, *dict, "<</n1 42\n/n2 .5\n/n3 [-100]>>");
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dict.reset(new SkPDFDict);
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assert_emit_eq(reporter, *dict, "<<>>");
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dict->insertInt("n1", 24);
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assert_emit_eq(reporter, *dict, "<</n1 24>>");
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dict->insertInt("n2", SkToSizeT(99));
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assert_emit_eq(reporter, *dict, "<</n1 24\n/n2 99>>");
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dict->insertScalar("n3", SK_ScalarHalf);
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assert_emit_eq(reporter, *dict, "<</n1 24\n/n2 99\n/n3 .5>>");
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dict->insertName("n4", "AName");
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assert_emit_eq(reporter, *dict, "<</n1 24\n/n2 99\n/n3 .5\n/n4 /AName>>");
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dict->insertName("n5", SkString("AnotherName"));
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assert_emit_eq(reporter, *dict, "<</n1 24\n/n2 99\n/n3 .5\n/n4 /AName\n"
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"/n5 /AnotherName>>");
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dict->insertString("n6", "A String");
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assert_emit_eq(reporter, *dict, "<</n1 24\n/n2 99\n/n3 .5\n/n4 /AName\n"
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"/n5 /AnotherName\n/n6 (A String)>>");
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dict->insertString("n7", SkString("Another String"));
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assert_emit_eq(reporter, *dict, "<</n1 24\n/n2 99\n/n3 .5\n/n4 /AName\n"
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"/n5 /AnotherName\n/n6 (A String)\n/n7 (Another String)>>");
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dict.reset(new SkPDFDict("DType"));
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assert_emit_eq(reporter, *dict, "<</Type /DType>>");
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sk_sp<SkPDFArray> referencedArray(new SkPDFArray);
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Catalog catalog;
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catalog.numbers.addObject(referencedArray.get());
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REPORTER_ASSERT(reporter, catalog.numbers.getObjectNumber(
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referencedArray.get()) == 1);
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dict->insertObjRef("n1", std::move(referencedArray));
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SkString result = emit_to_string(*dict, &catalog);
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assert_eq(reporter, result, "<</Type /DType\n/n1 1 0 R>>");
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}
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DEF_TEST(PDFPrimitives, reporter) {
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TestPDFUnion(reporter);
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TestPDFArray(reporter);
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TestPDFDict(reporter);
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TestPDFStream(reporter);
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TestObjectNumberMap(reporter);
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TestObjectRef(reporter);
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TestSubstitute(reporter);
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test_issue1083();
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}
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namespace {
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class DummyImageFilter : public SkImageFilter {
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public:
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static sk_sp<DummyImageFilter> Make(bool visited = false) {
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return sk_sp<DummyImageFilter>(new DummyImageFilter(visited));
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}
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SK_TO_STRING_OVERRIDE()
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SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(DummyImageFilter)
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bool visited() const { return fVisited; }
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protected:
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sk_sp<SkSpecialImage> onFilterImage(SkSpecialImage* source, const Context&,
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SkIPoint* offset) const override {
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fVisited = true;
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offset->fX = offset->fY = 0;
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return sk_ref_sp<SkSpecialImage>(source);
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}
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private:
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DummyImageFilter(bool visited) : INHERITED(nullptr, 0, nullptr), fVisited(visited) {}
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mutable bool fVisited;
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typedef SkImageFilter INHERITED;
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};
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sk_sp<SkFlattenable> DummyImageFilter::CreateProc(SkReadBuffer& buffer) {
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SK_IMAGEFILTER_UNFLATTEN_COMMON(common, 0);
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bool visited = buffer.readBool();
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return DummyImageFilter::Make(visited);
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}
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#ifndef SK_IGNORE_TO_STRING
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void DummyImageFilter::toString(SkString* str) const {
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str->appendf("DummyImageFilter: (");
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str->append(")");
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}
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#endif
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};
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// Check that PDF rendering of image filters successfully falls back to
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// CPU rasterization.
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DEF_TEST(PDFImageFilter, reporter) {
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SkDynamicMemoryWStream stream;
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sk_sp<SkDocument> doc(SkDocument::MakePDF(&stream));
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SkCanvas* canvas = doc->beginPage(100.0f, 100.0f);
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sk_sp<DummyImageFilter> filter(DummyImageFilter::Make());
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// Filter just created; should be unvisited.
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REPORTER_ASSERT(reporter, !filter->visited());
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SkPaint paint;
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paint.setImageFilter(filter.get());
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canvas->drawRect(SkRect::MakeWH(100, 100), paint);
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doc->close();
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// Filter was used in rendering; should be visited.
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REPORTER_ASSERT(reporter, filter->visited());
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}
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// Check that PDF rendering of image filters successfully falls back to
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// CPU rasterization.
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DEF_TEST(PDFFontCanEmbedTypeface, reporter) {
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SkPDFCanon canon;
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const char resource[] = "fonts/Roboto2-Regular_NoEmbed.ttf";
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sk_sp<SkTypeface> noEmbedTypeface(MakeResourceAsTypeface(resource));
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if (noEmbedTypeface) {
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REPORTER_ASSERT(reporter,
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!SkPDFFont::CanEmbedTypeface(noEmbedTypeface.get(), &canon));
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}
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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);
|
|
}
|
|
}
|