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;
}
CPDF_DeviceCS::CPDF_DeviceCS(CPDF_Document* pDoc, int family)
: CPDF_ColorSpace(pDoc, family, ComponentsForFamily(family)) {
}
