d9dfa18372
This change will reduce the size of PDFs to 50% (in the case of the existing SKPs, we reduce the total size of PDFs from 105MB to 50MB) Review URL: https://codereview.appspot.com/7068055 git-svn-id: http://skia.googlecode.com/svn/trunk@8835 2bbb7eff-a529-9590-31e7-b0007b416f81
450 lines
17 KiB
C++
450 lines
17 KiB
C++
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/*
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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 "Test.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 "SkFlate.h"
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#include "SkImageEncoder.h"
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#include "SkMatrix.h"
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#include "SkPDFCatalog.h"
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#include "SkPDFDevice.h"
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#include "SkPDFStream.h"
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#include "SkPDFTypes.h"
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#include "SkScalar.h"
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#include "SkStream.h"
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#include "SkTypes.h"
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class SkPDFTestDict : public SkPDFDict {
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public:
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virtual void getResources(const SkTSet<SkPDFObject*>& knownResourceObjects,
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SkTSet<SkPDFObject*>* newResourceObjects) {
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for (int i = 0; i < fResources.count(); i++) {
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newResourceObjects->add(fResources[i]);
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fResources[i]->ref();
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}
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}
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void addResource(SkPDFObject* object) {
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fResources.append(1, &object);
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}
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private:
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SkTDArray<SkPDFObject*> fResources;
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};
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static bool encode_to_dct_stream(SkWStream* stream, const SkBitmap& bitmap, const SkIRect& rect) {
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stream->writeText("DCT compessed stream.");
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return true;
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}
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static bool stream_equals(const SkDynamicMemoryWStream& stream, size_t offset,
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const void* buffer, size_t len) {
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SkAutoDataUnref data(stream.copyToData());
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if (offset + len > data->size()) {
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return false;
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}
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return memcmp(data->bytes() + offset, buffer, len) == 0;
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}
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static bool stream_contains(const SkDynamicMemoryWStream& stream,
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const char* buffer) {
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SkAutoDataUnref data(stream.copyToData());
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int len = strlen(buffer); // our buffer does not have EOSs.
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for (int offset = 0 ; offset < (int)data->size() - len; offset++) {
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if (memcmp(data->bytes() + offset, buffer, len) == 0) {
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return true;
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}
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}
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return false;
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}
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static void CheckObjectOutput(skiatest::Reporter* reporter, SkPDFObject* obj,
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const char* expectedData, size_t expectedSize,
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bool indirect, bool compression) {
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SkPDFDocument::Flags docFlags = (SkPDFDocument::Flags) 0;
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if (!compression) {
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docFlags = SkTBitOr(docFlags, SkPDFDocument::kFavorSpeedOverSize_Flags);
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}
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SkPDFCatalog catalog(docFlags);
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size_t directSize = obj->getOutputSize(&catalog, false);
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REPORTER_ASSERT(reporter, directSize == expectedSize);
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SkDynamicMemoryWStream buffer;
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obj->emit(&buffer, &catalog, false);
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REPORTER_ASSERT(reporter, directSize == buffer.getOffset());
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REPORTER_ASSERT(reporter, stream_equals(buffer, 0, expectedData,
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directSize));
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if (indirect) {
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// Indirect output.
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static char header[] = "1 0 obj\n";
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static size_t headerLen = strlen(header);
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static char footer[] = "\nendobj\n";
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static size_t footerLen = strlen(footer);
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catalog.addObject(obj, false);
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size_t indirectSize = obj->getOutputSize(&catalog, true);
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REPORTER_ASSERT(reporter,
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indirectSize == directSize + headerLen + footerLen);
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buffer.reset();
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obj->emit(&buffer, &catalog, true);
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REPORTER_ASSERT(reporter, indirectSize == buffer.getOffset());
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REPORTER_ASSERT(reporter, stream_equals(buffer, 0, header, headerLen));
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REPORTER_ASSERT(reporter, stream_equals(buffer, headerLen, expectedData,
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directSize));
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REPORTER_ASSERT(reporter, stream_equals(buffer, headerLen + directSize,
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footer, footerLen));
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}
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}
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static void SimpleCheckObjectOutput(skiatest::Reporter* reporter,
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SkPDFObject* obj,
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const char* expectedResult) {
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CheckObjectOutput(reporter, obj, expectedResult,
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strlen(expectedResult), true, false);
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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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SkAutoTUnref<SkMemoryStream> streamData(new SkMemoryStream(
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streamBytes, strlen(streamBytes), true));
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SkAutoTUnref<SkPDFStream> stream(new SkPDFStream(streamData.get()));
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SimpleCheckObjectOutput(
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reporter, stream.get(),
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"<</Length 12\n>> stream\nTest\nFoo\tBar\nendstream");
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stream->insert("Attribute", new SkPDFInt(42))->unref();
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SimpleCheckObjectOutput(reporter, stream.get(),
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"<</Length 12\n/Attribute 42\n>> stream\n"
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"Test\nFoo\tBar\nendstream");
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if (SkFlate::HaveFlate()) {
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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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SkAutoTUnref<SkPDFStream> stream(new SkPDFStream(streamData2.get()));
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SkDynamicMemoryWStream compressedByteStream;
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SkFlate::Deflate(streamData2.get(), &compressedByteStream);
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SkAutoDataUnref compressedData(compressedByteStream.copyToData());
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// Check first without compression.
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SkDynamicMemoryWStream expectedResult1;
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expectedResult1.writeText("<</Length 167\n>> stream\n");
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expectedResult1.writeText(streamBytes2);
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expectedResult1.writeText("\nendstream");
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SkAutoDataUnref expectedResultData1(expectedResult1.copyToData());
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CheckObjectOutput(reporter, stream.get(),
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(const char*) expectedResultData1->data(),
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expectedResultData1->size(), true, false);
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// Then again with compression.
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SkDynamicMemoryWStream expectedResult2;
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expectedResult2.writeText("<</Filter /FlateDecode\n/Length 116\n"
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">> stream\n");
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expectedResult2.write(compressedData->data(), compressedData->size());
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expectedResult2.writeText("\nendstream");
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SkAutoDataUnref expectedResultData2(expectedResult2.copyToData());
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CheckObjectOutput(reporter, stream.get(),
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(const char*) expectedResultData2->data(),
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expectedResultData2->size(), true, true);
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}
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}
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static void TestCatalog(skiatest::Reporter* reporter) {
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SkPDFCatalog catalog((SkPDFDocument::Flags)0);
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SkAutoTUnref<SkPDFInt> int1(new SkPDFInt(1));
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SkAutoTUnref<SkPDFInt> int2(new SkPDFInt(2));
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SkAutoTUnref<SkPDFInt> int3(new SkPDFInt(3));
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int1.get()->ref();
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SkAutoTUnref<SkPDFInt> int1Again(int1.get());
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catalog.addObject(int1.get(), false);
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catalog.addObject(int2.get(), false);
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catalog.addObject(int3.get(), false);
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REPORTER_ASSERT(reporter, catalog.getObjectNumberSize(int1.get()) == 3);
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REPORTER_ASSERT(reporter, catalog.getObjectNumberSize(int2.get()) == 3);
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REPORTER_ASSERT(reporter, catalog.getObjectNumberSize(int3.get()) == 3);
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SkDynamicMemoryWStream buffer;
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catalog.emitObjectNumber(&buffer, int1.get());
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catalog.emitObjectNumber(&buffer, int2.get());
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catalog.emitObjectNumber(&buffer, int3.get());
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catalog.emitObjectNumber(&buffer, int1Again.get());
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char expectedResult[] = "1 02 03 01 0";
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REPORTER_ASSERT(reporter, stream_equals(buffer, 0, expectedResult,
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strlen(expectedResult)));
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}
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static void TestObjectRef(skiatest::Reporter* reporter) {
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SkAutoTUnref<SkPDFInt> int1(new SkPDFInt(1));
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SkAutoTUnref<SkPDFInt> int2(new SkPDFInt(2));
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SkAutoTUnref<SkPDFObjRef> int2ref(new SkPDFObjRef(int2.get()));
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SkPDFCatalog catalog((SkPDFDocument::Flags)0);
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catalog.addObject(int1.get(), false);
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catalog.addObject(int2.get(), false);
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REPORTER_ASSERT(reporter, catalog.getObjectNumberSize(int1.get()) == 3);
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REPORTER_ASSERT(reporter, catalog.getObjectNumberSize(int2.get()) == 3);
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char expectedResult[] = "2 0 R";
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SkDynamicMemoryWStream buffer;
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int2ref->emitObject(&buffer, &catalog, false);
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REPORTER_ASSERT(reporter, buffer.getOffset() == strlen(expectedResult));
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REPORTER_ASSERT(reporter, stream_equals(buffer, 0, expectedResult,
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buffer.getOffset()));
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}
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static void TestSubstitute(skiatest::Reporter* reporter) {
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SkAutoTUnref<SkPDFTestDict> proxy(new SkPDFTestDict());
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SkAutoTUnref<SkPDFTestDict> stub(new SkPDFTestDict());
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SkAutoTUnref<SkPDFInt> int33(new SkPDFInt(33));
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SkAutoTUnref<SkPDFDict> stubResource(new SkPDFDict());
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SkAutoTUnref<SkPDFInt> int44(new SkPDFInt(44));
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stub->insert("Value", int33.get());
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stubResource->insert("InnerValue", int44.get());
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stub->addResource(stubResource.get());
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SkPDFCatalog catalog((SkPDFDocument::Flags)0);
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catalog.addObject(proxy.get(), false);
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catalog.setSubstitute(proxy.get(), stub.get());
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SkDynamicMemoryWStream buffer;
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proxy->emit(&buffer, &catalog, false);
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catalog.emitSubstituteResources(&buffer, false);
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char objectResult[] = "2 0 obj\n<</Value 33\n>>\nendobj\n";
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REPORTER_ASSERT(
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reporter,
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catalog.setFileOffset(proxy.get(), 0) == strlen(objectResult));
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char expectedResult[] =
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"<</Value 33\n>>1 0 obj\n<</InnerValue 44\n>>\nendobj\n";
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REPORTER_ASSERT(reporter, buffer.getOffset() == strlen(expectedResult));
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REPORTER_ASSERT(reporter, stream_equals(buffer, 0, expectedResult,
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buffer.getOffset()));
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}
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// Create a bitmap that would be easier to be compressed in a JPEG than ZIP.
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static void setup_jpegBitmap(SkBitmap* bitmap, int width, int height) {
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bitmap->setConfig(SkBitmap::kARGB_8888_Config, width, height);
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bitmap->allocPixels();
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for (int y = 0; y < bitmap->height(); y++) {
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for (int x = 0; x < bitmap->width(); x++) {
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*bitmap->getAddr32(x, y) =
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SkColorSetRGB(0 + y % 20 + 128 + 100 * cos(x * 0.01F),
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1 + y % 20 + 128 + 100 * cos(x * 0.1F),
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2 + y % 20 + 128 + 100 * cos(x * 1.0F));
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}
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}
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}
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// Create a bitmap that would be very eficiently compressed in a ZIP.
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static void setup_solidBitmap(SkBitmap* bitmap, int width, int height) {
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bitmap->setConfig(SkBitmap::kARGB_8888_Config, width, height);
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bitmap->allocPixels();
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bitmap->eraseColor(SK_ColorWHITE);
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}
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static void TestImage(skiatest::Reporter* reporter, const SkBitmap& bitmap,
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const char* expected, bool useDCTEncoder) {
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SkISize pageSize = SkISize::Make(bitmap.width(), bitmap.height());
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SkPDFDevice* dev = new SkPDFDevice(pageSize, pageSize, SkMatrix::I());
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if (useDCTEncoder) {
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dev->setDCTEncoder(encode_to_dct_stream);
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}
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SkCanvas c(dev);
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c.drawBitmap(bitmap, 0, 0, NULL);
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SkPDFDocument doc;
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doc.appendPage(dev);
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SkDynamicMemoryWStream stream;
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doc.emitPDF(&stream);
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REPORTER_ASSERT(reporter, stream_contains(stream, expected));
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}
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static void TestUncompressed(skiatest::Reporter* reporter) {
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SkBitmap bitmap;
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setup_solidBitmap(&bitmap, 1, 1);
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TestImage(reporter, bitmap,
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"/Subtype /Image\n"
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"/Width 1\n"
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"/Height 1\n"
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"/ColorSpace /DeviceRGB\n"
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"/BitsPerComponent 8\n"
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"/Length 3\n"
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">> stream",
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true);
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}
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static void TestFlateDecode(skiatest::Reporter* reporter) {
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if (!SkFlate::HaveFlate()) {
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return;
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}
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SkBitmap bitmap;
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setup_solidBitmap(&bitmap, 10, 10);
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TestImage(reporter, bitmap,
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"/Subtype /Image\n"
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"/Width 10\n"
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"/Height 10\n"
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"/ColorSpace /DeviceRGB\n"
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"/BitsPerComponent 8\n"
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"/Filter /FlateDecode\n"
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"/Length 13\n"
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">> stream",
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false);
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}
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static void TestDCTDecode(skiatest::Reporter* reporter) {
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SkBitmap bitmap;
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setup_jpegBitmap(&bitmap, 32, 32);
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TestImage(reporter, bitmap,
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"/Subtype /Image\n"
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"/Width 32\n"
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"/Height 32\n"
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"/ColorSpace /DeviceRGB\n"
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"/BitsPerComponent 8\n"
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"/Filter /DCTDecode\n"
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"/ColorTransform 0\n"
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"/Length 21\n"
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">> stream",
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true);
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}
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static void TestImages(skiatest::Reporter* reporter) {
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TestUncompressed(reporter);
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TestFlateDecode(reporter);
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TestDCTDecode(reporter);
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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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SkISize pageSize = SkISize::Make(100, 100);
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SkAutoTUnref<SkPDFDevice> dev(new SkPDFDevice(pageSize, pageSize, SkMatrix::I()));
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SkCanvas c(dev);
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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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c.drawText(&glyphID, 2, 0, 0, paint);
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SkPDFDocument doc;
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doc.appendPage(dev);
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SkDynamicMemoryWStream stream;
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doc.emitPDF(&stream);
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}
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static void TestPDFPrimitives(skiatest::Reporter* reporter) {
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SkAutoTUnref<SkPDFInt> int42(new SkPDFInt(42));
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SimpleCheckObjectOutput(reporter, int42.get(), "42");
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SkAutoTUnref<SkPDFScalar> realHalf(new SkPDFScalar(SK_ScalarHalf));
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SimpleCheckObjectOutput(reporter, realHalf.get(), "0.5");
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#if defined(SK_SCALAR_IS_FLOAT)
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SkAutoTUnref<SkPDFScalar> bigScalar(new SkPDFScalar(110999.75f));
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#if !defined(SK_ALLOW_LARGE_PDF_SCALARS)
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SimpleCheckObjectOutput(reporter, bigScalar.get(), "111000");
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#else
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SimpleCheckObjectOutput(reporter, bigScalar.get(), "110999.75");
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SkAutoTUnref<SkPDFScalar> biggerScalar(new SkPDFScalar(50000000.1));
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SimpleCheckObjectOutput(reporter, biggerScalar.get(), "50000000");
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SkAutoTUnref<SkPDFScalar> smallestScalar(new SkPDFScalar(1.0/65536));
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SimpleCheckObjectOutput(reporter, smallestScalar.get(), "0.00001526");
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#endif
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#endif
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SkAutoTUnref<SkPDFString> stringSimple(
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new SkPDFString("test ) string ( foo"));
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SimpleCheckObjectOutput(reporter, stringSimple.get(),
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"(test \\) string \\( foo)");
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SkAutoTUnref<SkPDFString> stringComplex(
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new SkPDFString("\ttest ) string ( foo"));
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SimpleCheckObjectOutput(reporter, stringComplex.get(),
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"<0974657374202920737472696E67202820666F6F>");
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SkAutoTUnref<SkPDFName> name(new SkPDFName("Test name\twith#tab"));
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const char expectedResult[] = "/Test#20name#09with#23tab";
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CheckObjectOutput(reporter, name.get(), expectedResult,
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strlen(expectedResult), false, false);
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SkAutoTUnref<SkPDFName> escapedName(new SkPDFName("A#/%()<>[]{}B"));
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const char escapedNameExpected[] = "/A#23#2F#25#28#29#3C#3E#5B#5D#7B#7DB";
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CheckObjectOutput(reporter, escapedName.get(), escapedNameExpected,
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strlen(escapedNameExpected), false, false);
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// Test that we correctly handle characters with the high-bit set.
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const unsigned char highBitCString[] = {0xDE, 0xAD, 'b', 'e', 0xEF, 0};
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SkAutoTUnref<SkPDFName> highBitName(
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new SkPDFName((const char*)highBitCString));
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const char highBitExpectedResult[] = "/#DE#ADbe#EF";
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CheckObjectOutput(reporter, highBitName.get(), highBitExpectedResult,
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strlen(highBitExpectedResult), false, false);
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SkAutoTUnref<SkPDFArray> array(new SkPDFArray);
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SimpleCheckObjectOutput(reporter, array.get(), "[]");
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array->append(int42.get());
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SimpleCheckObjectOutput(reporter, array.get(), "[42]");
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array->append(realHalf.get());
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SimpleCheckObjectOutput(reporter, array.get(), "[42 0.5]");
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SkAutoTUnref<SkPDFInt> int0(new SkPDFInt(0));
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array->append(int0.get());
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SimpleCheckObjectOutput(reporter, array.get(), "[42 0.5 0]");
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SkAutoTUnref<SkPDFInt> int1(new SkPDFInt(1));
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array->setAt(0, int1.get());
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SimpleCheckObjectOutput(reporter, array.get(), "[1 0.5 0]");
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SkAutoTUnref<SkPDFDict> dict(new SkPDFDict);
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SimpleCheckObjectOutput(reporter, dict.get(), "<<>>");
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SkAutoTUnref<SkPDFName> n1(new SkPDFName("n1"));
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dict->insert(n1.get(), int42.get());
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SimpleCheckObjectOutput(reporter, dict.get(), "<</n1 42\n>>");
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SkAutoTUnref<SkPDFName> n2(new SkPDFName("n2"));
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SkAutoTUnref<SkPDFName> n3(new SkPDFName("n3"));
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dict->insert(n2.get(), realHalf.get());
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dict->insert(n3.get(), array.get());
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SimpleCheckObjectOutput(reporter, dict.get(),
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"<</n1 42\n/n2 0.5\n/n3 [1 0.5 0]\n>>");
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TestPDFStream(reporter);
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TestCatalog(reporter);
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TestObjectRef(reporter);
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TestSubstitute(reporter);
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test_issue1083();
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TestImages(reporter);
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}
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#include "TestClassDef.h"
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DEFINE_TESTCLASS("PDFPrimitives", PDFPrimitivesTestClass, TestPDFPrimitives)
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