From 77f15f7883638a4ced131d74c053af10a5970ce9 Mon Sep 17 00:00:00 2001
From: Artem Strygin <art-snake@yandex-team.ru>
Date: Tue, 3 Jul 2018 19:20:56 +0000
Subject: Avoid duplicate data buffering in CPDF_SyntaxParser::ReadStream().

Allow sub-streams created from an IFX_SeekableReadStream to provide
stream data without copying memory.
The data will only reside in the top-level stream.

For example:
For file
http://www.major-landrover.ru/upload/attachments/f/9/f96aab07dab04ae89c8a509ec1ef2b31.pdf
(18 Mb)

The memory usage is reduced by ~13 Mb.

Change-Id: I2595c014d0fbe1fdd181cc04965cfd7d901c2d88
Reviewed-on: https://pdfium-review.googlesource.com/35930
Commit-Queue: Art Snake <art-snake@yandex-team.ru>
Reviewed-by: dsinclair <dsinclair@chromium.org>
---
 core/fpdfapi/edit/cpdf_flateencoder.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

(limited to 'core/fpdfapi/edit/cpdf_flateencoder.h')

diff --git a/core/fpdfapi/edit/cpdf_flateencoder.h b/core/fpdfapi/edit/cpdf_flateencoder.h
index 05633f6814..14ca7cec16 100644
--- a/core/fpdfapi/edit/cpdf_flateencoder.h
+++ b/core/fpdfapi/edit/cpdf_flateencoder.h
@@ -34,14 +34,14 @@ class CPDF_FlateEncoder {
   }
 
  private:
+  RetainPtr<CPDF_StreamAcc> m_pAcc;
+
   uint32_t m_dwSize;
   MaybeOwned<uint8_t, FxFreeDeleter> m_pData;
 
   // Only one of these two pointers is valid at any time.
   UnownedPtr<const CPDF_Dictionary> m_pDict;
   std::unique_ptr<CPDF_Dictionary> m_pClonedDict;
-
-  RetainPtr<CPDF_StreamAcc> m_pAcc;
 };
 
 #endif  // CORE_FPDFAPI_EDIT_CPDF_FLATEENCODER_H_
-- 
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