FX_DWORD PDF_DecodeInlineStream(const uint8_t* src_buf, FX_DWORD limit,
int width, int height, CFX_ByteString& decoder,
CPDF_Dictionary* pParam, uint8_t*& dest_buf, FX_DWORD& dest_size)
{
if (decoder == FX_BSTRC("CCITTFaxDecode") || decoder == FX_BSTRC("CCF")) {
ICodec_ScanlineDecoder* pDecoder = FPDFAPI_CreateFaxDecoder(src_buf, limit, width, height, pParam);
return _DecodeAllScanlines(pDecoder, dest_buf, dest_size);
} else if (decoder == FX_BSTRC("ASCII85Decode") || decoder == FX_BSTRC("A85")) {
return _A85Decode(src_buf, limit, dest_buf, dest_size);
} else if (decoder == FX_BSTRC("ASCIIHexDecode") || decoder == FX_BSTRC("AHx")) {
return _HexDecode(src_buf, limit, dest_buf, dest_size);
} else if (decoder == FX_BSTRC("FlateDecode") || decoder == FX_BSTRC("Fl")) {
return FPDFAPI_FlateOrLZWDecode(FALSE, src_buf, limit, pParam, dest_size, dest_buf, dest_size);
} else if (decoder == FX_BSTRC("LZWDecode") || decoder == FX_BSTRC("LZW")) {
return FPDFAPI_FlateOrLZWDecode(TRUE, src_buf, limit, pParam, 0, dest_buf, dest_size);
} else if (decoder == FX_BSTRC("DCTDecode") || decoder == FX_BSTRC("DCT")) {
ICodec_ScanlineDecoder* pDecoder = CPDF_ModuleMgr::Get()->GetJpegModule()->CreateDecoder(
src_buf, limit, width, height, 0, pParam ? pParam->GetInteger(FX_BSTRC("ColorTransform"), 1) : 1);
return _DecodeAllScanlines(pDecoder, dest_buf, dest_size);
} else if (decoder == FX_BSTRC("RunLengthDecode") || decoder == FX_BSTRC("RL")) {
return RunLengthDecode(src_buf, limit, dest_buf, dest_size);
}
dest_size = 0;
dest_buf = 0;
return (FX_DWORD) - 1;
}
int CPDF_DIBSource::CreateDecoder() {
const CFX_ByteString& decoder = m_pStreamAcc->GetImageDecoder();
if (decoder.IsEmpty())
return 1;
if (m_bDoBpcCheck && m_bpc == 0)
return 0;
if (decoder == "JPXDecode") {
LoadJpxBitmap();
return m_pCachedBitmap ? 1 : 0;
}
if (decoder == "JBIG2Decode") {
m_pCachedBitmap = pdfium::MakeUnique<CFX_DIBitmap>();
if (!m_pCachedBitmap->Create(
m_Width, m_Height, m_bImageMask ? FXDIB_1bppMask : FXDIB_1bppRgb)) {
m_pCachedBitmap.reset();
return 0;
}
m_Status = 1;
return 2;
}
const uint8_t* src_data = m_pStreamAcc->GetData();
uint32_t src_size = m_pStreamAcc->GetSize();
const CPDF_Dictionary* pParams = m_pStreamAcc->GetImageParam();
if (decoder == "CCITTFaxDecode") {
m_pDecoder = FPDFAPI_CreateFaxDecoder(src_data, src_size, m_Width, m_Height,
pParams);
} else if (decoder == "FlateDecode") {
m_pDecoder = FPDFAPI_CreateFlateDecoder(
src_data, src_size, m_Width, m_Height, m_nComponents, m_bpc, pParams);
} else if (decoder == "RunLengthDecode") {
m_pDecoder = CPDF_ModuleMgr::Get()
->GetCodecModule()
->GetBasicModule()
->CreateRunLengthDecoder(src_data, src_size, m_Width,
m_Height, m_nComponents, m_bpc);
} else if (decoder == "DCTDecode") {
m_pDecoder = CPDF_ModuleMgr::Get()->GetJpegModule()->CreateDecoder(
src_data, src_size, m_Width, m_Height, m_nComponents,
!pParams || pParams->GetIntegerFor("ColorTransform", 1));
if (!m_pDecoder) {
bool bTransform = false;
int comps;
int bpc;
CCodec_JpegModule* pJpegModule = CPDF_ModuleMgr::Get()->GetJpegModule();
if (pJpegModule->LoadInfo(src_data, src_size, &m_Width, &m_Height, &comps,
&bpc, &bTransform)) {
if (m_nComponents != static_cast<uint32_t>(comps)) {
FX_Free(m_pCompData);
m_pCompData = nullptr;
m_nComponents = static_cast<uint32_t>(comps);
if (m_pColorSpace) {
switch (m_Family) {
case PDFCS_DEVICEGRAY:
case PDFCS_DEVICERGB:
case PDFCS_DEVICECMYK: {
uint32_t dwMinComps = ComponentsForFamily(m_Family);
if (m_pColorSpace->CountComponents() < dwMinComps ||
m_nComponents < dwMinComps) {
return 0;
}
break;
}
case PDFCS_LAB: {
if (m_nComponents != 3 || m_pColorSpace->CountComponents() < 3)
return 0;
break;
}
case PDFCS_ICCBASED: {
if (!IsAllowedICCComponents(m_nComponents) ||
!IsAllowedICCComponents(m_pColorSpace->CountComponents()) ||
m_pColorSpace->CountComponents() < m_nComponents) {
return 0;
}
break;
}
default: {
if (m_pColorSpace->CountComponents() != m_nComponents)
return 0;
break;
}
}
} else {
if (m_Family == PDFCS_LAB && m_nComponents != 3)
return 0;
}
m_pCompData = GetDecodeAndMaskArray(m_bDefaultDecode, m_bColorKey);
if (!m_pCompData)
return 0;
}
m_bpc = bpc;
m_pDecoder = CPDF_ModuleMgr::Get()->GetJpegModule()->CreateDecoder(
src_data, src_size, m_Width, m_Height, m_nComponents, bTransform);
}
}
}
if (!m_pDecoder)
return 0;
FX_SAFE_UINT32 requested_pitch =
CalculatePitch8(m_bpc, m_nComponents, m_Width);
if (!requested_pitch.IsValid())
return 0;
FX_SAFE_UINT32 provided_pitch = CalculatePitch8(
m_pDecoder->GetBPC(), m_pDecoder->CountComps(), m_pDecoder->GetWidth());
if (!provided_pitch.IsValid())
return 0;
if (provided_pitch.ValueOrDie() < requested_pitch.ValueOrDie())
return 0;
return 1;
}
