Use number of components from ICC profile and alternate color space

BUG=406806

Review URL: https://codereview.chromium.org/493163003

3 files changed, 63 insertions, 37 deletions

diff --git a/core/src/fpdfapi/fpdf_page/fpdf_page_colors.cpp b/core/src/fpdfapi/fpdf_page/fpdf_page_colors.cpp
index f1640ad14a..b5b4695c6c 100644
--- a/core/src/fpdfapi/fpdf_page/fpdf_page_colors.cpp
+++ b/core/src/fpdfapi/fpdf_page/fpdf_page_colors.cpp
@@ -517,12 +517,16 @@ void CPDF_LabCS::TranslateImageLine(FX_LPBYTE pDestBuf, FX_LPCBYTE pSrcBuf, int
         pSrcBuf += 3;
     }
 }
-CPDF_IccProfile::CPDF_IccProfile(FX_LPCBYTE pData, FX_DWORD dwSize, int nComponents)
+CPDF_IccProfile::CPDF_IccProfile(FX_LPCBYTE pData, FX_DWORD dwSize)
 {
-    m_bsRGB = nComponents == 3 && dwSize == 3144 && FXSYS_memcmp32(pData + 0x190, "sRGB IEC61966-2.1", 17) == 0;
-    m_pTransform = NULL;
-    if (!m_bsRGB && CPDF_ModuleMgr::Get()->GetIccModule()) {
-        m_pTransform = CPDF_ModuleMgr::Get()->GetIccModule()->CreateTransform_sRGB(pData, dwSize, nComponents);
+    if (dwSize == 3144 && FXSYS_memcmp32(pData + 0x190, "sRGB IEC61966-2.1", 17) == 0) {
+        m_bsRGB = TRUE;
+        m_pTransform = NULL;
+        m_nSrcComponents = 3;
+    }
+    else if (CPDF_ModuleMgr::Get()->GetIccModule()) {
+        m_bsRGB = FALSE;
+        m_pTransform = CPDF_ModuleMgr::Get()->GetIccModule()->CreateTransform_sRGB(pData, dwSize, &m_nSrcComponents);
     }
 }
 CPDF_IccProfile::~CPDF_IccProfile()
@@ -583,49 +587,69 @@ FX_BOOL CPDF_ICCBasedCS::v_Load(CPDF_Document* pDoc, CPDF_Array* pArray)
     if (pStream == NULL) {
         return FALSE;
     }
-    CPDF_Dictionary* pDict = pStream->GetDict();
-    m_nComponents = pDict ? pDict->GetInteger(FX_BSTRC("N")) : 0;
-    if (m_nComponents != 1 && m_nComponents != 3 && m_nComponents != 4) {
-        return FALSE;
-    }
-    CPDF_Array* pRanges = pDict->GetArray(FX_BSTRC("Range"));
-    m_pRanges = FX_Alloc(FX_FLOAT, m_nComponents * 2);
-    for (int i = 0; i < m_nComponents * 2; i ++) {
-        if (pRanges) {
-            m_pRanges[i] = pRanges->GetNumber(i);
-        } else if (i % 2) {
-            m_pRanges[i] = 1.0f;
-        } else {
-            m_pRanges[i] = 0;
-        }
-    }
-    m_pProfile = pDoc->LoadIccProfile(pStream, m_nComponents);
+    m_pProfile = pDoc->LoadIccProfile(pStream);
     if (!m_pProfile) {
         return FALSE;
     }
-    if (m_pProfile->m_pTransform == NULL) {
+    m_nComponents = m_pProfile->GetComponents(); //Try using the nComponents from ICC profile
+    CPDF_Dictionary* pDict = pStream->GetDict();
+    FX_INT32 Dict_nComponents = pDict ? pDict->GetInteger(FX_BSTRC("N")) : 0;
+    if (m_pProfile->m_pTransform == NULL) { // No valid ICC profile or using sRGB
         CPDF_Object* pAlterCSObj = pDict ? pDict->GetElementValue(FX_BSTRC("Alternate")) : NULL;
         if (pAlterCSObj) {
             CPDF_ColorSpace* alter_cs = CPDF_ColorSpace::Load(pDoc, pAlterCSObj);
             if (alter_cs) {
-                if (alter_cs->CountComponents() > m_nComponents) {
-                    alter_cs->ReleaseCS();
-                } else {
-                    m_pAlterCS = alter_cs;
-                    m_bOwn = TRUE;
+                if (m_nComponents == 0) { // NO valid ICC profile
+                    if (alter_cs->CountComponents() > 0) { // Use Alternative colorspace
+                        m_nComponents = alter_cs->CountComponents();
+                        m_pAlterCS = alter_cs;
+                        m_bOwn = TRUE;
+                    }
+                    else { // No valid alternative colorspace
+                        alter_cs->ReleaseCS();
+                        if (Dict_nComponents == 1 || Dict_nComponents == 3 || Dict_nComponents == 4 ) {
+                            m_nComponents = Dict_nComponents;
+                        }
+                        else {
+                            return FALSE;
+                        }
+                    }
+
+                }
+                else { // Using sRGB
+                    if (alter_cs->CountComponents() != m_nComponents) {
+                        alter_cs->ReleaseCS();
+                    }
+                    else {
+                        m_pAlterCS = alter_cs;
+                        m_bOwn = TRUE;
+                    }
                 }
             }
         }
         if (!m_pAlterCS) {
+            if (m_nComponents == 1) {
+                m_pAlterCS = GetStockCS(PDFCS_DEVICEGRAY);
+            }
             if (m_nComponents == 3) {
                 m_pAlterCS = GetStockCS(PDFCS_DEVICERGB);
-            } else if (m_nComponents == 4) {
+            }
+            else if (m_nComponents == 4) {
                 m_pAlterCS = GetStockCS(PDFCS_DEVICECMYK);
-            } else {
-                m_pAlterCS = GetStockCS(PDFCS_DEVICEGRAY);
             }
         }
     }
+    CPDF_Array* pRanges = pDict->GetArray(FX_BSTRC("Range"));
+    m_pRanges = FX_Alloc(FX_FLOAT, m_nComponents * 2);
+    for (int i = 0; i < m_nComponents * 2; i ++) {
+        if (pRanges) {
+            m_pRanges[i] = pRanges->GetNumber(i);
+        } else if (i % 2) {
+            m_pRanges[i] = 1.0f;
+        } else {
+            m_pRanges[i] = 0;
+        }
+    }
     return TRUE;
 }
 FX_BOOL CPDF_ICCBasedCS::GetRGB(FX_FLOAT* pBuf, FX_FLOAT& R, FX_FLOAT& G, FX_FLOAT& B) const
diff --git a/core/src/fpdfapi/fpdf_page/fpdf_page_doc.cpp b/core/src/fpdfapi/fpdf_page/fpdf_page_doc.cpp
index 0b52800939..16f0a9cfad 100644
--- a/core/src/fpdfapi/fpdf_page/fpdf_page_doc.cpp
+++ b/core/src/fpdfapi/fpdf_page/fpdf_page_doc.cpp
@@ -107,9 +107,9 @@ CPDF_Pattern* CPDF_Document::LoadPattern(CPDF_Object* pPatternObj, FX_BOOL bShad
 {
     return GetValidatePageData()->GetPattern(pPatternObj, bShading, matrix);
 }
-CPDF_IccProfile* CPDF_Document::LoadIccProfile(CPDF_Stream* pStream, int nComponents)
+CPDF_IccProfile* CPDF_Document::LoadIccProfile(CPDF_Stream* pStream)
 {
-    return GetValidatePageData()->GetIccProfile(pStream, nComponents);
+    return GetValidatePageData()->GetIccProfile(pStream);
 }
 CPDF_Image* CPDF_Document::LoadImageF(CPDF_Object* pObj)
 {
@@ -543,7 +543,7 @@ void CPDF_DocPageData::ReleaseImage(CPDF_Object* pImageStream)
     }
     PDF_DocPageData_Release<FX_DWORD, CPDF_Image*>(m_ImageMap, pImageStream->GetObjNum(), NULL);
 }
-CPDF_IccProfile* CPDF_DocPageData::GetIccProfile(CPDF_Stream* pIccProfileStream, FX_INT32 nComponents)
+CPDF_IccProfile* CPDF_DocPageData::GetIccProfile(CPDF_Stream* pIccProfileStream)
 {
     if (!pIccProfileStream) {
         return NULL;
@@ -563,7 +563,7 @@ CPDF_IccProfile* CPDF_DocPageData::GetIccProfile(CPDF_Stream* pIccProfileStream,
         ipData->m_nCount++;
         return ipData->m_Obj;
     }
-    CPDF_IccProfile* pProfile = FX_NEW CPDF_IccProfile(stream.GetData(), stream.GetSize(), nComponents);
+    CPDF_IccProfile* pProfile = FX_NEW CPDF_IccProfile(stream.GetData(), stream.GetSize());
     if (!pProfile) {
         return NULL;
     }
diff --git a/core/src/fpdfapi/fpdf_page/pageint.h b/core/src/fpdfapi/fpdf_page/pageint.h
index 625e5df737..24261ef8b2 100644
--- a/core/src/fpdfapi/fpdf_page/pageint.h
+++ b/core/src/fpdfapi/fpdf_page/pageint.h
@@ -426,7 +426,7 @@ public:
     void                        ReleasePattern(CPDF_Object* pPatternObj);
     CPDF_Image*                 GetImage(CPDF_Object* pImageStream);
     void                        ReleaseImage(CPDF_Object* pImageStream);
-    CPDF_IccProfile*            GetIccProfile(CPDF_Stream* pIccProfileStream, FX_INT32 nComponents);
+    CPDF_IccProfile*            GetIccProfile(CPDF_Stream* pIccProfileStream);
     void                        ReleaseIccProfile(CPDF_Stream* pIccProfileStream, CPDF_IccProfile* pIccProfile);
     CPDF_StreamAcc*             GetFontFileStreamAcc(CPDF_Stream* pFontStream);
     void                        ReleaseFontFileStreamAcc(CPDF_Stream* pFontStream, FX_BOOL bForce = FALSE);
@@ -468,9 +468,11 @@ protected:
 class CPDF_IccProfile : public CFX_Object
 {
 public:
-    CPDF_IccProfile(FX_LPCBYTE pData, FX_DWORD dwSize, int nComponents);
+    CPDF_IccProfile(FX_LPCBYTE pData, FX_DWORD dwSize);
     ~CPDF_IccProfile();
+    FX_INT32 GetComponents() { return m_nSrcComponents; }
     FX_BOOL					m_bsRGB;
+    FX_INT32                m_nSrcComponents;
     FX_LPVOID				m_pTransform;
 };
 class CPDF_DeviceCS : public CPDF_ColorSpace