epoger@google.com | ec3ed6a | 2011-07-28 14:26:00 +0000 | [diff] [blame] | 1 | |
vandebo@chromium.org | 8459d4e | 2010-09-24 22:25:30 +0000 | [diff] [blame] | 2 | /* |
epoger@google.com | ec3ed6a | 2011-07-28 14:26:00 +0000 | [diff] [blame] | 3 | * Copyright 2010 Google Inc. |
vandebo@chromium.org | 8459d4e | 2010-09-24 22:25:30 +0000 | [diff] [blame] | 4 | * |
epoger@google.com | ec3ed6a | 2011-07-28 14:26:00 +0000 | [diff] [blame] | 5 | * Use of this source code is governed by a BSD-style license that can be |
| 6 | * found in the LICENSE file. |
vandebo@chromium.org | 8459d4e | 2010-09-24 22:25:30 +0000 | [diff] [blame] | 7 | */ |
| 8 | |
epoger@google.com | ec3ed6a | 2011-07-28 14:26:00 +0000 | [diff] [blame] | 9 | |
reed@google.com | 8a85d0c | 2011-06-24 19:12:12 +0000 | [diff] [blame] | 10 | #include "SkData.h" |
vandebo@chromium.org | a09ef97 | 2010-12-01 22:17:20 +0000 | [diff] [blame] | 11 | #include "SkFlate.h" |
vandebo@chromium.org | 8459d4e | 2010-09-24 22:25:30 +0000 | [diff] [blame] | 12 | #include "SkPDFCatalog.h" |
| 13 | #include "SkPDFStream.h" |
| 14 | #include "SkStream.h" |
| 15 | |
vandebo@chromium.org | 421d644 | 2011-07-20 17:39:01 +0000 | [diff] [blame] | 16 | static bool skip_compression(SkPDFCatalog* catalog) { |
| 17 | return catalog->getDocumentFlags() & SkPDFDocument::kNoCompression_Flag; |
| 18 | } |
vandebo@chromium.org | 1cfa2c4 | 2011-01-31 19:35:43 +0000 | [diff] [blame] | 19 | |
vandebo@chromium.org | 421d644 | 2011-07-20 17:39:01 +0000 | [diff] [blame] | 20 | SkPDFStream::SkPDFStream(SkStream* stream) |
| 21 | : fState(kUnused_State), |
| 22 | fData(stream) { |
| 23 | } |
| 24 | |
| 25 | SkPDFStream::SkPDFStream(SkData* data) : fState(kUnused_State) { |
| 26 | SkMemoryStream* stream = new SkMemoryStream; |
| 27 | stream->setData(data); |
| 28 | fData = stream; |
| 29 | fData->unref(); // SkRefPtr and new both took a reference. |
| 30 | } |
| 31 | |
| 32 | SkPDFStream::SkPDFStream(const SkPDFStream& pdfStream) |
| 33 | : SkPDFDict(), |
| 34 | fState(kUnused_State), |
| 35 | fData(pdfStream.fData) { |
| 36 | bool removeLength = true; |
| 37 | // Don't uncompress an already compressed stream, but we could. |
| 38 | if (pdfStream.fState == kCompressed_State) { |
| 39 | fState = kCompressed_State; |
| 40 | removeLength = false; |
vandebo@chromium.org | a09ef97 | 2010-12-01 22:17:20 +0000 | [diff] [blame] | 41 | } |
vandebo@chromium.org | 421d644 | 2011-07-20 17:39:01 +0000 | [diff] [blame] | 42 | SkPDFDict::Iter dict(pdfStream); |
| 43 | SkPDFName* key; |
| 44 | SkPDFObject* value; |
| 45 | SkPDFName lengthName("Length"); |
| 46 | for (key = dict.next(&value); key != NULL; key = dict.next(&value)) { |
| 47 | if (removeLength && *key == lengthName) { |
| 48 | continue; |
| 49 | } |
| 50 | this->insert(key, value); |
| 51 | } |
vandebo@chromium.org | 8459d4e | 2010-09-24 22:25:30 +0000 | [diff] [blame] | 52 | } |
| 53 | |
vandebo@chromium.org | 421d644 | 2011-07-20 17:39:01 +0000 | [diff] [blame] | 54 | SkPDFStream::~SkPDFStream() {} |
vandebo@chromium.org | 8459d4e | 2010-09-24 22:25:30 +0000 | [diff] [blame] | 55 | |
| 56 | void SkPDFStream::emitObject(SkWStream* stream, SkPDFCatalog* catalog, |
| 57 | bool indirect) { |
vandebo@chromium.org | 421d644 | 2011-07-20 17:39:01 +0000 | [diff] [blame] | 58 | if (indirect) { |
vandebo@chromium.org | 8459d4e | 2010-09-24 22:25:30 +0000 | [diff] [blame] | 59 | return emitIndirectObject(stream, catalog); |
vandebo@chromium.org | 421d644 | 2011-07-20 17:39:01 +0000 | [diff] [blame] | 60 | } |
| 61 | if (!this->populate(catalog)) { |
| 62 | return fSubstitute->emitObject(stream, catalog, indirect); |
| 63 | } |
vandebo@chromium.org | 8459d4e | 2010-09-24 22:25:30 +0000 | [diff] [blame] | 64 | |
vandebo@chromium.org | d90c141 | 2011-02-24 21:50:04 +0000 | [diff] [blame] | 65 | this->INHERITED::emitObject(stream, catalog, false); |
vandebo@chromium.org | 8459d4e | 2010-09-24 22:25:30 +0000 | [diff] [blame] | 66 | stream->writeText(" stream\n"); |
vandebo@chromium.org | 421d644 | 2011-07-20 17:39:01 +0000 | [diff] [blame] | 67 | stream->write(fData->getMemoryBase(), fData->getLength()); |
vandebo@chromium.org | 9b49dc0 | 2010-10-20 22:23:29 +0000 | [diff] [blame] | 68 | stream->writeText("\nendstream"); |
vandebo@chromium.org | 8459d4e | 2010-09-24 22:25:30 +0000 | [diff] [blame] | 69 | } |
| 70 | |
| 71 | size_t SkPDFStream::getOutputSize(SkPDFCatalog* catalog, bool indirect) { |
vandebo@chromium.org | 421d644 | 2011-07-20 17:39:01 +0000 | [diff] [blame] | 72 | if (indirect) { |
vandebo@chromium.org | 8459d4e | 2010-09-24 22:25:30 +0000 | [diff] [blame] | 73 | return getIndirectOutputSize(catalog); |
vandebo@chromium.org | 421d644 | 2011-07-20 17:39:01 +0000 | [diff] [blame] | 74 | } |
| 75 | if (!this->populate(catalog)) { |
| 76 | return fSubstitute->getOutputSize(catalog, indirect); |
| 77 | } |
vandebo@chromium.org | 8459d4e | 2010-09-24 22:25:30 +0000 | [diff] [blame] | 78 | |
vandebo@chromium.org | d90c141 | 2011-02-24 21:50:04 +0000 | [diff] [blame] | 79 | return this->INHERITED::getOutputSize(catalog, false) + |
vandebo@chromium.org | 421d644 | 2011-07-20 17:39:01 +0000 | [diff] [blame] | 80 | strlen(" stream\n\nendstream") + fData->getLength(); |
| 81 | } |
| 82 | |
| 83 | SkPDFStream::SkPDFStream() : fState(kUnused_State) {} |
| 84 | |
| 85 | void SkPDFStream::setData(SkStream* stream) { |
| 86 | fData = stream; |
| 87 | } |
| 88 | |
| 89 | bool SkPDFStream::populate(SkPDFCatalog* catalog) { |
| 90 | if (fState == kUnused_State) { |
| 91 | if (!skip_compression(catalog) && SkFlate::HaveFlate()) { |
| 92 | SkDynamicMemoryWStream compressedData; |
| 93 | |
| 94 | SkAssertResult(SkFlate::Deflate(fData.get(), &compressedData)); |
| 95 | if (compressedData.getOffset() < fData->getLength()) { |
| 96 | SkMemoryStream* stream = new SkMemoryStream; |
vandebo@chromium.org | 610f716 | 2012-03-14 18:34:15 +0000 | [diff] [blame] | 97 | stream->setData(compressedData.copyToData())->unref(); |
vandebo@chromium.org | 421d644 | 2011-07-20 17:39:01 +0000 | [diff] [blame] | 98 | fData = stream; |
| 99 | fData->unref(); // SkRefPtr and new both took a reference. |
| 100 | insertName("Filter", "FlateDecode"); |
| 101 | } |
| 102 | fState = kCompressed_State; |
| 103 | } else { |
| 104 | fState = kNoCompression_State; |
| 105 | } |
| 106 | insertInt("Length", fData->getLength()); |
| 107 | } else if (fState == kNoCompression_State && !skip_compression(catalog) && |
| 108 | SkFlate::HaveFlate()) { |
| 109 | if (!fSubstitute.get()) { |
| 110 | fSubstitute = new SkPDFStream(*this); |
| 111 | fSubstitute->unref(); // SkRefPtr and new both took a reference. |
| 112 | catalog->setSubstitute(this, fSubstitute.get()); |
| 113 | } |
| 114 | return false; |
| 115 | } |
| 116 | return true; |
vandebo@chromium.org | 8459d4e | 2010-09-24 22:25:30 +0000 | [diff] [blame] | 117 | } |