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 "SkPDFStream.h" |
| 13 | #include "SkStream.h" |
halcanary | 67ec1f8 | 2014-06-27 11:36:20 -0700 | [diff] [blame] | 14 | #include "SkStreamPriv.h" |
vandebo@chromium.org | 8459d4e | 2010-09-24 22:25:30 +0000 | [diff] [blame] | 15 | |
vandebo@chromium.org | 26e1449 | 2013-08-26 22:52:09 +0000 | [diff] [blame] | 16 | SkPDFStream::SkPDFStream(SkStream* stream) : fState(kUnused_State) { |
halcanary | 67ec1f8 | 2014-06-27 11:36:20 -0700 | [diff] [blame] | 17 | this->setData(stream); |
vandebo@chromium.org | 421d644 | 2011-07-20 17:39:01 +0000 | [diff] [blame] | 18 | } |
| 19 | |
| 20 | SkPDFStream::SkPDFStream(SkData* data) : fState(kUnused_State) { |
halcanary | 67ec1f8 | 2014-06-27 11:36:20 -0700 | [diff] [blame] | 21 | this->setData(data); |
vandebo@chromium.org | 421d644 | 2011-07-20 17:39:01 +0000 | [diff] [blame] | 22 | } |
| 23 | |
vandebo@chromium.org | 421d644 | 2011-07-20 17:39:01 +0000 | [diff] [blame] | 24 | SkPDFStream::~SkPDFStream() {} |
vandebo@chromium.org | 8459d4e | 2010-09-24 22:25:30 +0000 | [diff] [blame] | 25 | |
halcanary | 37c46ca | 2015-03-31 12:30:20 -0700 | [diff] [blame] | 26 | void SkPDFStream::emitObject(SkWStream* stream, |
| 27 | const SkPDFObjNumMap& objNumMap, |
| 28 | const SkPDFSubstituteMap& substitutes) { |
| 29 | if (fState == kUnused_State) { |
| 30 | fState = kNoCompression_State; |
| 31 | SkDynamicMemoryWStream compressedData; |
| 32 | |
| 33 | SkAssertResult( |
| 34 | SkFlate::Deflate(fDataStream.get(), &compressedData)); |
| 35 | SkAssertResult(fDataStream->rewind()); |
| 36 | if (compressedData.getOffset() < this->dataSize()) { |
| 37 | SkAutoTDelete<SkStream> compressed( |
| 38 | compressedData.detachAsStream()); |
| 39 | this->setData(compressed.get()); |
halcanary | 7b6db09 | 2015-03-31 12:44:47 -0700 | [diff] [blame] | 40 | this->insertName("Filter", "FlateDecode"); |
halcanary | 37c46ca | 2015-03-31 12:30:20 -0700 | [diff] [blame] | 41 | } |
| 42 | fState = kCompressed_State; |
halcanary | 7b6db09 | 2015-03-31 12:44:47 -0700 | [diff] [blame] | 43 | this->insertInt("Length", this->dataSize()); |
halcanary | 37c46ca | 2015-03-31 12:30:20 -0700 | [diff] [blame] | 44 | } |
| 45 | this->INHERITED::emitObject(stream, objNumMap, substitutes); |
vandebo@chromium.org | 8459d4e | 2010-09-24 22:25:30 +0000 | [diff] [blame] | 46 | stream->writeText(" stream\n"); |
halcanary | e322482 | 2014-07-14 09:12:12 -0700 | [diff] [blame] | 47 | stream->writeStream(fDataStream.get(), fDataStream->getLength()); |
| 48 | SkAssertResult(fDataStream->rewind()); |
vandebo@chromium.org | 9b49dc0 | 2010-10-20 22:23:29 +0000 | [diff] [blame] | 49 | stream->writeText("\nendstream"); |
vandebo@chromium.org | 8459d4e | 2010-09-24 22:25:30 +0000 | [diff] [blame] | 50 | } |
| 51 | |
vandebo@chromium.org | 421d644 | 2011-07-20 17:39:01 +0000 | [diff] [blame] | 52 | SkPDFStream::SkPDFStream() : fState(kUnused_State) {} |
| 53 | |
commit-bot@chromium.org | d8d976e | 2013-07-08 23:17:57 +0000 | [diff] [blame] | 54 | void SkPDFStream::setData(SkData* data) { |
scroggo | a1193e4 | 2015-01-21 12:09:53 -0800 | [diff] [blame] | 55 | // FIXME: Don't swap if the data is the same. |
| 56 | fDataStream.reset(SkNEW_ARGS(SkMemoryStream, (data))); |
commit-bot@chromium.org | d8d976e | 2013-07-08 23:17:57 +0000 | [diff] [blame] | 57 | } |
| 58 | |
vandebo@chromium.org | 421d644 | 2011-07-20 17:39:01 +0000 | [diff] [blame] | 59 | void SkPDFStream::setData(SkStream* stream) { |
halcanary | af9c85d | 2015-03-31 08:22:01 -0700 | [diff] [blame] | 60 | SkASSERT(stream); |
vandebo@chromium.org | 26e1449 | 2013-08-26 22:52:09 +0000 | [diff] [blame] | 61 | // Code assumes that the stream starts at the beginning and is rewindable. |
halcanary | af9c85d | 2015-03-31 08:22:01 -0700 | [diff] [blame] | 62 | // SkStreamRewindableFromSkStream will try stream->duplicate(). |
| 63 | fDataStream.reset(SkStreamRewindableFromSkStream(stream)); |
| 64 | SkASSERT(fDataStream.get()); |
halcanary | 67ec1f8 | 2014-06-27 11:36:20 -0700 | [diff] [blame] | 65 | } |
| 66 | |
| 67 | size_t SkPDFStream::dataSize() const { |
halcanary | e322482 | 2014-07-14 09:12:12 -0700 | [diff] [blame] | 68 | SkASSERT(fDataStream->hasLength()); |
| 69 | return fDataStream->getLength(); |
vandebo@chromium.org | 421d644 | 2011-07-20 17:39:01 +0000 | [diff] [blame] | 70 | } |