CPDF_ContentParser::Stage CPDF_ContentParser::PrepareContent() {
m_CurrentOffset = 0;
if (m_StreamArray.empty()) {
m_pData.Reset(m_pSingleStream->GetData());
m_Size = m_pSingleStream->GetSize();
return Stage::kParse;
}
FX_SAFE_UINT32 safeSize = 0;
for (const auto& stream : m_StreamArray) {
m_StreamSegmentOffsets.push_back(safeSize.ValueOrDie());
safeSize += stream->GetSize();
safeSize += 1;
if (!safeSize.IsValid())
return Stage::kComplete;
}
m_Size = safeSize.ValueOrDie();
m_pData.Reset(
std::unique_ptr<uint8_t, FxFreeDeleter>(FX_Alloc(uint8_t, m_Size)));
uint32_t pos = 0;
for (const auto& stream : m_StreamArray) {
memcpy(m_pData.Get() + pos, stream->GetData(), stream->GetSize());
pos += stream->GetSize();
m_pData.Get()[pos++] = ' ';
}
m_StreamArray.clear();
return Stage::kParse;
}
bool CCodec_RLScanlineDecoder::Create(const uint8_t* src_buf,
uint32_t src_size,
int width,
int height,
int nComps,
int bpc) {
m_pSrcBuf = src_buf;
m_SrcSize = src_size;
m_OutputWidth = m_OrigWidth = width;
m_OutputHeight = m_OrigHeight = height;
m_nComps = nComps;
m_bpc = bpc;
// Aligning the pitch to 4 bytes requires an integer overflow check.
FX_SAFE_UINT32 pitch = width;
pitch *= nComps;
pitch *= bpc;
pitch += 31;
pitch /= 32;
pitch *= 4;
if (!pitch.IsValid()) {
return false;
}
m_Pitch = pitch.ValueOrDie();
// Overflow should already have been checked before this is called.
m_dwLineBytes = (static_cast<uint32_t>(width) * nComps * bpc + 7) / 8;
m_pScanline = FX_Alloc(uint8_t, m_Pitch);
return CheckDestSize();
}
FX_BOOL CPDF_SampledFunc::v_Init(CPDF_Object* pObj) {
CPDF_Stream* pStream = pObj->AsStream();
if (!pStream)
return false;
CPDF_Dictionary* pDict = pStream->GetDict();
CPDF_Array* pSize = pDict->GetArrayBy("Size");
CPDF_Array* pEncode = pDict->GetArrayBy("Encode");
CPDF_Array* pDecode = pDict->GetArrayBy("Decode");
m_nBitsPerSample = pDict->GetIntegerBy("BitsPerSample");
if (!IsValidBitsPerSample(m_nBitsPerSample))
return FALSE;
m_SampleMax = 0xffffffff >> (32 - m_nBitsPerSample);
m_pSampleStream.reset(new CPDF_StreamAcc);
m_pSampleStream->LoadAllData(pStream, FALSE);
FX_SAFE_UINT32 nTotalSampleBits = 1;
m_EncodeInfo.resize(m_nInputs);
for (uint32_t i = 0; i < m_nInputs; i++) {
m_EncodeInfo[i].sizes = pSize ? pSize->GetIntegerAt(i) : 0;
if (!pSize && i == 0)
m_EncodeInfo[i].sizes = pDict->GetIntegerBy("Size");
nTotalSampleBits *= m_EncodeInfo[i].sizes;
if (pEncode) {
m_EncodeInfo[i].encode_min = pEncode->GetFloatAt(i * 2);
m_EncodeInfo[i].encode_max = pEncode->GetFloatAt(i * 2 + 1);
} else {
m_EncodeInfo[i].encode_min = 0;
m_EncodeInfo[i].encode_max =
m_EncodeInfo[i].sizes == 1 ? 1 : (FX_FLOAT)m_EncodeInfo[i].sizes - 1;
}
}
nTotalSampleBits *= m_nBitsPerSample;
nTotalSampleBits *= m_nOutputs;
FX_SAFE_UINT32 nTotalSampleBytes = nTotalSampleBits;
nTotalSampleBytes += 7;
nTotalSampleBytes /= 8;
if (!nTotalSampleBytes.IsValid() || nTotalSampleBytes.ValueOrDie() == 0 ||
nTotalSampleBytes.ValueOrDie() > m_pSampleStream->GetSize()) {
return FALSE;
}
m_DecodeInfo.resize(m_nOutputs);
for (uint32_t i = 0; i < m_nOutputs; i++) {
if (pDecode) {
m_DecodeInfo[i].decode_min = pDecode->GetFloatAt(2 * i);
m_DecodeInfo[i].decode_max = pDecode->GetFloatAt(2 * i + 1);
} else {
m_DecodeInfo[i].decode_min = m_pRanges[i * 2];
m_DecodeInfo[i].decode_max = m_pRanges[i * 2 + 1];
}
}
return TRUE;
}
int CPDF_DIBSource::ContinueToLoadMask() {
if (m_bImageMask) {
m_bpp = 1;
m_bpc = 1;
m_nComponents = 1;
m_AlphaFlag = 1;
} else if (m_bpc * m_nComponents == 1) {
m_bpp = 1;
} else if (m_bpc * m_nComponents <= 8) {
m_bpp = 8;
} else {
m_bpp = 24;
}
if (!m_bpc || !m_nComponents) {
return 0;
}
FX_SAFE_UINT32 pitch = CalculatePitch32(m_bpp, m_Width);
if (!pitch.IsValid()) {
return 0;
}
m_pLineBuf = FX_Alloc(uint8_t, pitch.ValueOrDie());
if (m_pColorSpace && m_bStdCS) {
m_pColorSpace->EnableStdConversion(true);
}
LoadPalette();
if (m_bColorKey) {
m_bpp = 32;
m_AlphaFlag = 2;
pitch = CalculatePitch32(m_bpp, m_Width);
if (!pitch.IsValid()) {
return 0;
}
m_pMaskedLine = FX_Alloc(uint8_t, pitch.ValueOrDie());
}
m_Pitch = pitch.ValueOrDie();
return 1;
}
bool CPDF_DIBSource::Load(CPDF_Document* pDoc, const CPDF_Stream* pStream) {
if (!pStream)
return false;
m_pDocument = pDoc;
m_pDict = pStream->GetDict();
if (!m_pDict)
return false;
m_pStream = pStream;
m_Width = m_pDict->GetIntegerFor("Width");
m_Height = m_pDict->GetIntegerFor("Height");
if (m_Width <= 0 || m_Height <= 0 || m_Width > kMaxImageDimension ||
m_Height > kMaxImageDimension) {
return false;
}
m_GroupFamily = 0;
m_bLoadMask = false;
if (!LoadColorInfo(nullptr, nullptr))
return false;
if (m_bDoBpcCheck && (m_bpc == 0 || m_nComponents == 0))
return false;
FX_SAFE_UINT32 src_size =
CalculatePitch8(m_bpc, m_nComponents, m_Width) * m_Height;
if (!src_size.IsValid())
return false;
m_pStreamAcc = pdfium::MakeUnique<CPDF_StreamAcc>();
m_pStreamAcc->LoadAllData(pStream, false, src_size.ValueOrDie(), true);
if (m_pStreamAcc->GetSize() == 0 || !m_pStreamAcc->GetData())
return false;
if (!CreateDecoder())
return false;
if (m_bImageMask) {
m_bpp = 1;
m_bpc = 1;
m_nComponents = 1;
m_AlphaFlag = 1;
} else if (m_bpc * m_nComponents == 1) {
m_bpp = 1;
} else if (m_bpc * m_nComponents <= 8) {
m_bpp = 8;
} else {
m_bpp = 24;
}
FX_SAFE_UINT32 pitch = CalculatePitch32(m_bpp, m_Width);
if (!pitch.IsValid())
return false;
m_pLineBuf = FX_Alloc(uint8_t, pitch.ValueOrDie());
LoadPalette();
if (m_bColorKey) {
m_bpp = 32;
m_AlphaFlag = 2;
pitch = CalculatePitch32(m_bpp, m_Width);
if (!pitch.IsValid())
return false;
m_pMaskedLine = FX_Alloc(uint8_t, pitch.ValueOrDie());
}
m_Pitch = pitch.ValueOrDie();
return true;
}
void CPDF_ContentParser::Continue(IFX_Pause* pPause) {
int steps = 0;
while (m_Status == ToBeContinued) {
if (m_InternalStage == STAGE_GETCONTENT) {
if (m_CurrentOffset == m_nStreams) {
if (!m_StreamArray.empty()) {
FX_SAFE_UINT32 safeSize = 0;
for (const auto& stream : m_StreamArray) {
safeSize += stream->GetSize();
safeSize += 1;
}
if (!safeSize.IsValid()) {
m_Status = Done;
return;
}
m_Size = safeSize.ValueOrDie();
m_pData = FX_Alloc(uint8_t, m_Size);
uint32_t pos = 0;
for (const auto& stream : m_StreamArray) {
FXSYS_memcpy(m_pData + pos, stream->GetData(), stream->GetSize());
pos += stream->GetSize();
m_pData[pos++] = ' ';
}
m_StreamArray.clear();
} else {
m_pData = (uint8_t*)m_pSingleStream->GetData();
m_Size = m_pSingleStream->GetSize();
}
m_InternalStage = STAGE_PARSE;
m_CurrentOffset = 0;
} else {
CPDF_Array* pContent =
m_pObjectHolder->m_pFormDict->GetArrayFor("Contents");
m_StreamArray[m_CurrentOffset].reset(new CPDF_StreamAcc);
CPDF_Stream* pStreamObj = ToStream(
pContent ? pContent->GetDirectObjectAt(m_CurrentOffset) : nullptr);
m_StreamArray[m_CurrentOffset]->LoadAllData(pStreamObj, false);
m_CurrentOffset++;
}
}
if (m_InternalStage == STAGE_PARSE) {
if (!m_pParser) {
m_pParser.reset(new CPDF_StreamContentParser(
m_pObjectHolder->m_pDocument, m_pObjectHolder->m_pPageResources,
nullptr, nullptr, m_pObjectHolder, m_pObjectHolder->m_pResources,
&m_pObjectHolder->m_BBox, nullptr, 0));
m_pParser->GetCurStates()->m_ColorState.SetDefault();
}
if (m_CurrentOffset >= m_Size) {
m_InternalStage = STAGE_CHECKCLIP;
} else {
m_CurrentOffset +=
m_pParser->Parse(m_pData + m_CurrentOffset,
m_Size - m_CurrentOffset, PARSE_STEP_LIMIT);
}
}
if (m_InternalStage == STAGE_CHECKCLIP) {
if (m_pType3Char) {
m_pType3Char->m_bColored = m_pParser->IsColored();
m_pType3Char->m_Width =
FXSYS_round(m_pParser->GetType3Data()[0] * 1000);
m_pType3Char->m_BBox.left =
FXSYS_round(m_pParser->GetType3Data()[2] * 1000);
m_pType3Char->m_BBox.bottom =
FXSYS_round(m_pParser->GetType3Data()[3] * 1000);
m_pType3Char->m_BBox.right =
FXSYS_round(m_pParser->GetType3Data()[4] * 1000);
m_pType3Char->m_BBox.top =
FXSYS_round(m_pParser->GetType3Data()[5] * 1000);
}
for (auto& pObj : *m_pObjectHolder->GetPageObjectList()) {
if (!pObj->m_ClipPath)
continue;
if (pObj->m_ClipPath.GetPathCount() != 1)
continue;
if (pObj->m_ClipPath.GetTextCount())
continue;
CPDF_Path ClipPath = pObj->m_ClipPath.GetPath(0);
if (!ClipPath.IsRect() || pObj->IsShading())
continue;
CFX_FloatRect old_rect(ClipPath.GetPointX(0), ClipPath.GetPointY(0),
ClipPath.GetPointX(2), ClipPath.GetPointY(2));
CFX_FloatRect obj_rect(pObj->m_Left, pObj->m_Bottom, pObj->m_Right,
pObj->m_Top);
if (old_rect.Contains(obj_rect))
pObj->m_ClipPath.SetNull();
}
m_Status = Done;
return;
}
steps++;
if (pPause && pPause->NeedToPauseNow())
break;
}
}
void sycc420_to_rgb(opj_image_t* img) {
if (!sycc420_size_is_valid(img))
return;
OPJ_UINT32 prec = img->comps[0].prec;
if (!prec)
return;
OPJ_UINT32 offset = 1 << (prec - 1);
OPJ_UINT32 upb = (1 << prec) - 1;
OPJ_UINT32 yw = img->comps[0].w;
OPJ_UINT32 yh = img->comps[0].h;
OPJ_UINT32 cbw = img->comps[1].w;
OPJ_UINT32 cbh = img->comps[1].h;
OPJ_UINT32 crw = img->comps[2].w;
bool extw = sycc420_must_extend_cbcr(yw, cbw);
bool exth = sycc420_must_extend_cbcr(yh, cbh);
FX_SAFE_UINT32 safeSize = yw;
safeSize *= yh;
if (!safeSize.IsValid())
return;
int* r = FX_Alloc(int, safeSize.ValueOrDie());
int* g = FX_Alloc(int, safeSize.ValueOrDie());
int* b = FX_Alloc(int, safeSize.ValueOrDie());
int* d0 = r;
int* d1 = g;
int* d2 = b;
const int* y = img->comps[0].data;
const int* cb = img->comps[1].data;
const int* cr = img->comps[2].data;
if (!y || !cb || !cr)
return;
const int* ny = nullptr;
int* nr = nullptr;
int* ng = nullptr;
int* nb = nullptr;
OPJ_UINT32 i = 0;
OPJ_UINT32 j = 0;
for (i = 0; i < (yh & ~(OPJ_UINT32)1); i += 2) {
ny = y + yw;
nr = r + yw;
ng = g + yw;
nb = b + yw;
for (j = 0; j < (yw & ~(OPJ_UINT32)1); j += 2) {
sycc_to_rgb(offset, upb, *y, *cb, *cr, r, g, b);
++y;
++r;
++g;
++b;
sycc_to_rgb(offset, upb, *y, *cb, *cr, r, g, b);
++y;
++r;
++g;
++b;
sycc_to_rgb(offset, upb, *ny, *cb, *cr, nr, ng, nb);
++ny;
++nr;
++ng;
++nb;
sycc_to_rgb(offset, upb, *ny, *cb, *cr, nr, ng, nb);
++ny;
++nr;
++ng;
++nb;
++cb;
++cr;
}
if (j < yw) {
if (extw) {
--cb;
--cr;
}
sycc_to_rgb(offset, upb, *y, *cb, *cr, r, g, b);
++y;
++r;
++g;
++b;
sycc_to_rgb(offset, upb, *ny, *cb, *cr, nr, ng, nb);
++ny;
++nr;
++ng;
++nb;
++cb;
++cr;
}
y += yw;
r += yw;
g += yw;
b += yw;
}
if (i < yh) {
if (exth) {
cb -= cbw;
cr -= crw;
}
for (j = 0; j < (yw & ~(OPJ_UINT32)1); j += 2) {
sycc_to_rgb(offset, upb, *y, *cb, *cr, r, g, b);
++y;
++r;
++g;
++b;
sycc_to_rgb(offset, upb, *y, *cb, *cr, r, g, b);
++y;
++r;
++g;
++b;
++cb;
++cr;
}
if (j < yw) {
if (extw) {
--cb;
--cr;
}
sycc_to_rgb(offset, upb, *y, *cb, *cr, r, g, b);
}
}
FX_Free(img->comps[0].data);
img->comps[0].data = d0;
FX_Free(img->comps[1].data);
img->comps[1].data = d1;
FX_Free(img->comps[2].data);
img->comps[2].data = d2;
img->comps[1].w = yw;
img->comps[1].h = yh;
img->comps[2].w = yw;
img->comps[2].h = yh;
img->comps[1].w = yw;
img->comps[1].h = yh;
img->comps[2].w = yw;
img->comps[2].h = yh;
img->comps[1].dx = img->comps[0].dx;
img->comps[2].dx = img->comps[0].dx;
img->comps[1].dy = img->comps[0].dy;
img->comps[2].dy = img->comps[0].dy;
}