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-rw-r--r--core/src/fxcodec/jbig2/JBig2_BitStream.cpp14
-rw-r--r--core/src/fxcodec/jbig2/JBig2_BitStream.h6
-rw-r--r--core/src/fxcodec/jbig2/JBig2_Context.cpp80
-rw-r--r--core/src/fxcodec/jbig2/JBig2_Context.h22
-rw-r--r--core/src/fxcodec/jbig2/JBig2_Segment.cpp3
-rw-r--r--core/src/fxcodec/jbig2/JBig2_Segment.h3
6 files changed, 71 insertions, 57 deletions
diff --git a/core/src/fxcodec/jbig2/JBig2_BitStream.cpp b/core/src/fxcodec/jbig2/JBig2_BitStream.cpp
index 4a4ed992c7..f39a396e71 100644
--- a/core/src/fxcodec/jbig2/JBig2_BitStream.cpp
+++ b/core/src/fxcodec/jbig2/JBig2_BitStream.cpp
@@ -4,12 +4,18 @@
// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
+#include "../../../include/fpdfapi/fpdf_objects.h"
#include "JBig2_BitStream.h"
#include <algorithm>
-CJBig2_BitStream::CJBig2_BitStream(const uint8_t* pBuffer, FX_DWORD dwLength)
- : m_pBuf(pBuffer), m_dwLength(dwLength), m_dwByteIdx(0), m_dwBitIdx(0) {
+CJBig2_BitStream::CJBig2_BitStream(CPDF_StreamAcc* pSrcStream)
+ : m_pBuf(pSrcStream->GetData()),
+ m_dwLength(pSrcStream->GetSize()),
+ m_dwByteIdx(0),
+ m_dwBitIdx(0),
+ m_dwObjNum(pSrcStream->GetStream() ? pSrcStream->GetStream()->GetObjNum()
+ : 0) {
if (m_dwLength > 256 * 1024 * 1024) {
m_dwLength = 0;
m_pBuf = nullptr;
@@ -176,3 +182,7 @@ bool CJBig2_BitStream::IsInBound() const {
FX_DWORD CJBig2_BitStream::LengthInBits() const {
return m_dwLength << 3;
}
+
+FX_DWORD CJBig2_BitStream::getObjNum() const {
+ return m_dwObjNum;
+}
diff --git a/core/src/fxcodec/jbig2/JBig2_BitStream.h b/core/src/fxcodec/jbig2/JBig2_BitStream.h
index 9a3d8b0a18..c7c50b8c81 100644
--- a/core/src/fxcodec/jbig2/JBig2_BitStream.h
+++ b/core/src/fxcodec/jbig2/JBig2_BitStream.h
@@ -9,9 +9,11 @@
#include "../../../include/fxcrt/fx_basic.h"
+class CPDF_StreamAcc;
+
class CJBig2_BitStream {
public:
- CJBig2_BitStream(const uint8_t* pBuffer, FX_DWORD dwLength);
+ explicit CJBig2_BitStream(CPDF_StreamAcc* pSrcStream);
~CJBig2_BitStream();
// TODO(thestig): readFoo() should return bool.
@@ -36,6 +38,7 @@ class CJBig2_BitStream {
const uint8_t* getPointer() const;
void offset(FX_DWORD dwOffset);
FX_DWORD getByteLeft() const;
+ FX_DWORD getObjNum() const;
private:
void AdvanceBit();
@@ -46,6 +49,7 @@ class CJBig2_BitStream {
FX_DWORD m_dwLength;
FX_DWORD m_dwByteIdx;
FX_DWORD m_dwBitIdx;
+ const FX_DWORD m_dwObjNum;
CJBig2_BitStream(const CJBig2_BitStream&) = delete;
void operator=(const CJBig2_BitStream&) = delete;
diff --git a/core/src/fxcodec/jbig2/JBig2_Context.cpp b/core/src/fxcodec/jbig2/JBig2_Context.cpp
index 7b11ca2e5e..bb01cb6be8 100644
--- a/core/src/fxcodec/jbig2/JBig2_Context.cpp
+++ b/core/src/fxcodec/jbig2/JBig2_Context.cpp
@@ -35,35 +35,26 @@ size_t GetRefAggContextSize(FX_BOOL val) {
// list keeps track of the freshness of entries, with freshest ones
// at the front. Even a tiny cache size like 2 makes a dramatic
// difference for typical JBIG2 documents.
-//
-// Disabled until we can figure out how to clear cache between documents.
-// https://code.google.com/p/pdfium/issues/detail?id=207
-#define DISABLE_SYMBOL_CACHE
-#ifndef DISABLE_SYMBOL_CACHE
static const int kSymbolDictCacheMaxSize = 2;
-#endif
CJBig2_Context* CJBig2_Context::CreateContext(
- const uint8_t* pGlobalData,
- FX_DWORD dwGlobalLength,
- const uint8_t* pData,
- FX_DWORD dwLength,
+ CPDF_StreamAcc* pGlobalStream,
+ CPDF_StreamAcc* pSrcStream,
std::list<CJBig2_CachePair>* pSymbolDictCache,
IFX_Pause* pPause) {
- return new CJBig2_Context(pGlobalData, dwGlobalLength, pData, dwLength,
- pSymbolDictCache, pPause);
+ return new CJBig2_Context(pGlobalStream, pSrcStream, pSymbolDictCache, pPause,
+ false);
}
void CJBig2_Context::DestroyContext(CJBig2_Context* pContext) {
delete pContext;
}
-CJBig2_Context::CJBig2_Context(const uint8_t* pGlobalData,
- FX_DWORD dwGlobalLength,
- const uint8_t* pData,
- FX_DWORD dwLength,
+CJBig2_Context::CJBig2_Context(CPDF_StreamAcc* pGlobalStream,
+ CPDF_StreamAcc* pSrcStream,
std::list<CJBig2_CachePair>* pSymbolDictCache,
- IFX_Pause* pPause)
+ IFX_Pause* pPause,
+ bool bIsGlobal)
: m_nSegmentDecoded(0),
m_bInPage(false),
m_bBufSpecified(false),
@@ -72,15 +63,16 @@ CJBig2_Context::CJBig2_Context(const uint8_t* pGlobalData,
m_ProcessingStatus(FXCODEC_STATUS_FRAME_READY),
m_gbContext(NULL),
m_dwOffset(0),
- m_pSymbolDictCache(pSymbolDictCache) {
- if (pGlobalData && (dwGlobalLength > 0)) {
- m_pGlobalContext = new CJBig2_Context(
- nullptr, 0, pGlobalData, dwGlobalLength, pSymbolDictCache, pPause);
+ m_pSymbolDictCache(pSymbolDictCache),
+ m_bIsGlobal(bIsGlobal) {
+ if (pGlobalStream && (pGlobalStream->GetSize() > 0)) {
+ m_pGlobalContext = new CJBig2_Context(nullptr, pGlobalStream,
+ pSymbolDictCache, pPause, true);
} else {
m_pGlobalContext = nullptr;
}
- m_pStream.reset(new CJBig2_BitStream(pData, dwLength));
+ m_pStream.reset(new CJBig2_BitStream(pSrcStream));
}
CJBig2_Context::~CJBig2_Context() {
@@ -331,7 +323,8 @@ int32_t CJBig2_Context::parseSegmentHeader(CJBig2_Segment* pSegment) {
if (m_pStream->readInteger(&pSegment->m_dwData_length) != 0)
return JBIG2_ERROR_TOO_SHORT;
- pSegment->m_pData = m_pStream->getPointer();
+ pSegment->m_dwObjNum = m_pStream->getObjNum();
+ pSegment->m_dwDataOffset = m_pStream->getOffset();
pSegment->m_State = JBIG2_SEGMENT_DATA_UNPARSED;
return JBIG2_SUCCESS;
}
@@ -602,18 +595,21 @@ int32_t CJBig2_Context::parseSymbolDict(CJBig2_Segment* pSegment,
JBIG2_memset(grContext.get(), 0, sizeof(JBig2ArithCtx) * size);
}
}
- const uint8_t* key = pSegment->m_pData;
+ CJBig2_CacheKey key =
+ CJBig2_CacheKey(pSegment->m_dwObjNum, pSegment->m_dwDataOffset);
FX_BOOL cache_hit = false;
pSegment->m_nResultType = JBIG2_SYMBOL_DICT_POINTER;
- for (std::list<CJBig2_CachePair>::iterator it = m_pSymbolDictCache->begin();
- it != m_pSymbolDictCache->end(); ++it) {
- if (it->first == key) {
- nonstd::unique_ptr<CJBig2_SymbolDict> copy(it->second->DeepCopy());
- pSegment->m_Result.sd = copy.release();
- m_pSymbolDictCache->push_front(*it);
- m_pSymbolDictCache->erase(it);
- cache_hit = true;
- break;
+ if (m_bIsGlobal && key.first != 0) {
+ for (auto it = m_pSymbolDictCache->begin(); it != m_pSymbolDictCache->end();
+ ++it) {
+ if (it->first == key) {
+ nonstd::unique_ptr<CJBig2_SymbolDict> copy(it->second->DeepCopy());
+ pSegment->m_Result.sd = copy.release();
+ m_pSymbolDictCache->push_front(*it);
+ m_pSymbolDictCache->erase(it);
+ cache_hit = true;
+ break;
+ }
}
}
if (!cache_hit) {
@@ -634,17 +630,17 @@ int32_t CJBig2_Context::parseSymbolDict(CJBig2_Segment* pSegment,
return JBIG2_ERROR_FATAL;
m_pStream->alignByte();
}
-#ifndef DISABLE_SYMBOL_CACHE
- nonstd::unique_ptr<CJBig2_SymbolDict> value =
- pSegment->m_Result.sd->DeepCopy();
- if (value && kSymbolDictCacheMaxSize > 0) {
- while (m_pSymbolDictCache->size() >= kSymbolDictCacheMaxSize) {
- delete m_pSymbolDictCache->back().second;
- m_pSymbolDictCache->pop_back();
+ if (m_bIsGlobal && kSymbolDictCacheMaxSize > 0) {
+ nonstd::unique_ptr<CJBig2_SymbolDict> value =
+ pSegment->m_Result.sd->DeepCopy();
+ if (value) {
+ while (m_pSymbolDictCache->size() >= kSymbolDictCacheMaxSize) {
+ delete m_pSymbolDictCache->back().second;
+ m_pSymbolDictCache->pop_back();
+ }
+ m_pSymbolDictCache->push_front(CJBig2_CachePair(key, value.release()));
}
- m_pSymbolDictCache->push_front(CJBig2_CachePair(key, value.release()));
}
-#endif
}
if (wFlags & 0x0200) {
pSegment->m_Result.sd->m_bContextRetained = TRUE;
diff --git a/core/src/fxcodec/jbig2/JBig2_Context.h b/core/src/fxcodec/jbig2/JBig2_Context.h
index 4fcef810f6..61379fe2ff 100644
--- a/core/src/fxcodec/jbig2/JBig2_Context.h
+++ b/core/src/fxcodec/jbig2/JBig2_Context.h
@@ -11,6 +11,7 @@
#include <utility>
#include "../../../../third_party/base/nonstd_unique_ptr.h"
+#include "../../../include/fpdfapi/fpdf_objects.h"
#include "../../../include/fxcodec/fx_codec_def.h"
#include "JBig2_List.h"
#include "JBig2_Page.h"
@@ -20,7 +21,10 @@ class CJBig2_ArithDecoder;
class CJBig2_GRDProc;
class IFX_Pause;
-using CJBig2_CachePair = std::pair<const uint8_t*, CJBig2_SymbolDict*>;
+// Cache is keyed by the ObjNum of a stream and an index within the stream.
+using CJBig2_CacheKey = std::pair<FX_DWORD, FX_DWORD>;
+// NB: CJBig2_SymbolDict* is owned.
+using CJBig2_CachePair = std::pair<CJBig2_CacheKey, CJBig2_SymbolDict*>;
#define JBIG2_SUCCESS 0
#define JBIG2_FAILED -1
@@ -36,10 +40,8 @@ using CJBig2_CachePair = std::pair<const uint8_t*, CJBig2_SymbolDict*>;
class CJBig2_Context {
public:
static CJBig2_Context* CreateContext(
- const uint8_t* pGlobalData,
- FX_DWORD dwGlobalLength,
- const uint8_t* pData,
- FX_DWORD dwLength,
+ CPDF_StreamAcc* pGlobalStream,
+ CPDF_StreamAcc* pSrcStream,
std::list<CJBig2_CachePair>* pSymbolDictCache,
IFX_Pause* pPause = NULL);
@@ -55,12 +57,11 @@ class CJBig2_Context {
FXCODEC_STATUS GetProcessingStatus() { return m_ProcessingStatus; }
private:
- CJBig2_Context(const uint8_t* pGlobalData,
- FX_DWORD dwGlobalLength,
- const uint8_t* pData,
- FX_DWORD dwLength,
+ CJBig2_Context(CPDF_StreamAcc* pGlobalStream,
+ CPDF_StreamAcc* pSrcStream,
std::list<CJBig2_CachePair>* pSymbolDictCache,
- IFX_Pause* pPause);
+ IFX_Pause* pPause,
+ bool bIsGlobal);
~CJBig2_Context();
@@ -126,6 +127,7 @@ class CJBig2_Context {
FX_DWORD m_dwOffset;
JBig2RegionInfo m_ri;
std::list<CJBig2_CachePair>* const m_pSymbolDictCache;
+ bool m_bIsGlobal;
};
#endif // CORE_SRC_FXCODEC_JBIG2_JBIG2_CONTEXT_H_
diff --git a/core/src/fxcodec/jbig2/JBig2_Segment.cpp b/core/src/fxcodec/jbig2/JBig2_Segment.cpp
index 7ad55f3515..1b0d4e9303 100644
--- a/core/src/fxcodec/jbig2/JBig2_Segment.cpp
+++ b/core/src/fxcodec/jbig2/JBig2_Segment.cpp
@@ -16,7 +16,8 @@ CJBig2_Segment::CJBig2_Segment() {
m_dwPage_association = 0;
m_dwData_length = 0;
m_dwHeader_Length = 0;
- m_pData = NULL;
+ m_dwObjNum = 0;
+ m_dwDataOffset = 0;
m_State = JBIG2_SEGMENT_HEADER_UNPARSED;
m_nResultType = JBIG2_VOID_POINTER;
m_Result.vd = NULL;
diff --git a/core/src/fxcodec/jbig2/JBig2_Segment.h b/core/src/fxcodec/jbig2/JBig2_Segment.h
index b80a5d282f..4aef27289a 100644
--- a/core/src/fxcodec/jbig2/JBig2_Segment.h
+++ b/core/src/fxcodec/jbig2/JBig2_Segment.h
@@ -50,7 +50,8 @@ class CJBig2_Segment {
FX_DWORD m_dwData_length;
FX_DWORD m_dwHeader_Length;
- const uint8_t* m_pData;
+ FX_DWORD m_dwObjNum;
+ FX_DWORD m_dwDataOffset;
JBig2_SegmentState m_State;
JBig2_ResultType m_nResultType;
union {
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-01 20:01:55 +0000