a1193e4b0e
SkStream is a stateful object, so it does not make sense for it to have multiple owners. Make SkStream inherit directly from SkNoncopyable. Update methods which previously called SkStream::ref() (e.g. SkImageDecoder::buildTileIndex() and SkFrontBufferedStream::Create(), which required the existing owners to call SkStream::unref()) to take ownership of their SkStream parameters and delete when done (including on failure). Switch all SkAutoTUnref<SkStream>s to SkAutoTDelete<SkStream>s. In some cases this means heap allocating streams that were previously stack allocated. Respect ownership rules of SkTypeface::CreateFromStream() and SkImageDecoder::buildTileIndex(). Update the comments for exceptional methods which do not affect the ownership of their SkStream parameters (e.g. SkPicture::CreateFromStream() and SkTypeface::Deserialize()) to be explicit about ownership. Remove test_stream_life, which tested that buildTileIndex() behaved correctly when SkStream was a ref counted object. The test does not make sense now that it is not. In SkPDFStream, remove the SkMemoryStream member. Instead of using it, create a new SkMemoryStream to pass to fDataStream (which is now an SkAutoTDelete). Make other pdf rasterizers behave like SkPDFDocumentToBitmap. SkPDFDocumentToBitmap delete the SkStream, so do the same in the following pdf rasterizers: SkPopplerRasterizePDF SkNativeRasterizePDF SkNoRasterizePDF Requires a change to Android, which currently treats SkStreams as ref counted objects. Review URL: https://codereview.chromium.org/849103004
492 lines
18 KiB
C++
492 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 "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 "SkReadBuffer.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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#include "Test.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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#define DUMMY_TEXT "DCT compessed stream."
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static SkData* encode_to_dct_data(size_t* pixelRefOffset, const SkBitmap& bitmap) {
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*pixelRefOffset = 0;
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return SkData::NewWithProc(DUMMY_TEXT, sizeof(DUMMY_TEXT) - 1, NULL, NULL);
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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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size_t len = strlen(buffer); // our buffer does not have EOSs.
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for (size_t offset = 0 ; offset < 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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SkAutoTDelete<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);
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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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SkTSet<SkPDFObject*>* substituteResources =
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catalog.getSubstituteList(false);
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for (int i = 0; i < substituteResources->count(); ++i) {
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(*substituteResources)[i]->emit(&buffer, &catalog, true);
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}
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char objectResult[] = "2 0 obj\n<</Value 33\n>>\nendobj\n";
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catalog.setFileOffset(proxy.get(), 0);
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size_t outputSize = catalog.getSubstituteObject(proxy.get())
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->getOutputSize(&catalog, true);
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REPORTER_ASSERT(reporter, outputSize == 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 very eficiently compressed in a ZIP.
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static void setup_bitmap(SkBitmap* bitmap, int width, int height) {
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bitmap->allocN32Pixels(width, height);
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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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SkAutoTUnref<SkPDFDevice> dev(new SkPDFDevice(pageSize, pageSize, SkMatrix::I()));
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if (useDCTEncoder) {
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dev->setDCTEncoder(encode_to_dct_data);
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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_bitmap(&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_bitmap(&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_bitmap(&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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DEF_TEST(PDFPrimitives, 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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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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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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namespace {
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class DummyImageFilter : public SkImageFilter {
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public:
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DummyImageFilter(bool visited = false) : SkImageFilter(0, NULL), fVisited(visited) {}
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~DummyImageFilter() SK_OVERRIDE {}
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virtual bool onFilterImage(Proxy*, const SkBitmap& src, const Context&,
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SkBitmap* result, SkIPoint* offset) const {
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fVisited = true;
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offset->fX = offset->fY = 0;
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*result = src;
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return true;
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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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private:
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mutable bool fVisited;
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};
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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 SkNEW_ARGS(DummyImageFilter, (visited));
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}
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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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#endif
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|
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};
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|
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// Check that PDF rendering of image filters successfully falls back to
|
|
// CPU rasterization.
|
|
DEF_TEST(PDFImageFilter, reporter) {
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SkISize pageSize = SkISize::Make(100, 100);
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|
SkAutoTUnref<SkPDFDevice> device(new SkPDFDevice(pageSize, pageSize, SkMatrix::I()));
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SkCanvas canvas(device.get());
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SkAutoTUnref<DummyImageFilter> filter(new DummyImageFilter());
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|
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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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|
|
// Filter was used in rendering; should be visited.
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|
REPORTER_ASSERT(reporter, filter->visited());
|
|
}
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