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| author | Lei Zhang <thestig@chromium.org> | 2018-05-01 14:37:54 +0000 |
|---|---|---|
| committer | Chromium commit bot <commit-bot@chromium.org> | 2018-05-01 14:37:54 +0000 |
| commit | 1599b465904a312f0d0455cd26cdc9b0fe7b7d0c (patch) | |
| tree | 38a7a3c997c642e91fe9a6e00086dfdf34382f73 /core/fxcodec/jbig2/JBig2_PddProc.cpp | |
| parent | ea603b9f0baf33462b61fa4ee6364e4f4161f55a (diff) | |
| download | pdfium-1599b465904a312f0d0455cd26cdc9b0fe7b7d0c.tar.xz | |
Add struct CJBig2_GRDProc::ProgressiveArithDecodeState.
Track the decode state in one data structure. Also grab pointers to data
structure members before tight loops when decoding. It turns out
referring to this->foo in tight loops can actually slow down decoding.
Change-Id: I6a09b08ca06ef05968966055b5ad20f8c89896af
Reviewed-on: https://pdfium-review.googlesource.com/31790
Commit-Queue: Ryan Harrison <rharrison@chromium.org>
Reviewed-by: Ryan Harrison <rharrison@chromium.org>
Diffstat (limited to 'core/fxcodec/jbig2/JBig2_PddProc.cpp')
| -rw-r--r-- | core/fxcodec/jbig2/JBig2_PddProc.cpp | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/core/fxcodec/jbig2/JBig2_PddProc.cpp b/core/fxcodec/jbig2/JBig2_PddProc.cpp index 18c50ef4cd..32f29d745c 100644 --- a/core/fxcodec/jbig2/JBig2_PddProc.cpp +++ b/core/fxcodec/jbig2/JBig2_PddProc.cpp @@ -38,10 +38,16 @@ std::unique_ptr<CJBig2_PatternDict> CJBig2_PDDProc::DecodeArith( pGRD->GBAT[6] = -2; pGRD->GBAT[7] = -2; } - FXCODEC_STATUS status = - pGRD->StartDecodeArith(&BHDC, pArithDecoder, gbContext, nullptr); + CJBig2_GRDProc::ProgressiveArithDecodeState state; + state.pImage = &BHDC; + state.pArithDecoder = pArithDecoder; + state.gbContext = gbContext; + state.pPause = nullptr; + + FXCODEC_STATUS status = pGRD->StartDecodeArith(&state); + state.pPause = pPause; while (status == FXCODEC_STATUS_DECODE_TOBECONTINUE) - status = pGRD->ContinueDecode(pPause, pArithDecoder); + status = pGRD->ContinueDecode(&state); if (!BHDC) return nullptr; |