Add restrictions to alternate color spaces.
- ICC color spaces cannot have a Pattern color space as Alternate
- Separation and DeviceN color spaces cannot have a special color space
as Alternate. Special color spaces are {Separation, DeviceN, Indexed and
Pattern}.
Bug: chromium:794492
Change-Id: Ia2199382c759d8d1d13c605c22d6495e935265ad
Reviewed-on: https://pdfium-review.googlesource.com/21310
Commit-Queue: Henrique Nakashima <hnakashima@chromium.org>
Reviewed-by: dsinclair <dsinclair@chromium.org>
diff --git a/core/fpdfapi/page/cpdf_colorspace.cpp b/core/fpdfapi/page/cpdf_colorspace.cpp
index c09562c..89d5285 100644
--- a/core/fpdfapi/page/cpdf_colorspace.cpp
+++ b/core/fpdfapi/page/cpdf_colorspace.cpp
@@ -947,6 +947,9 @@
if (!pAlterCS)
return false;
+ if (pAlterCS->GetFamily() == PDFCS_PATTERN)
+ return false;
+
if (pAlterCS->CountComponents() != m_nComponents)
return false;
@@ -1102,6 +1105,9 @@
if (!m_pAltCS)
return false;
+ if (m_pAltCS->IsSpecial())
+ return false;
+
CPDF_Object* pFuncObj = pArray->GetDirectObjectAt(3);
if (pFuncObj && !pFuncObj->IsName())
m_pFunc = CPDF_Function::Load(pFuncObj);
@@ -1181,6 +1187,9 @@
if (!m_pAltCS || !m_pFunc)
return false;
+ if (m_pAltCS->IsSpecial())
+ return false;
+
return m_pFunc->CountOutputs() >= m_pAltCS->CountComponents();
}
diff --git a/core/fpdfapi/page/cpdf_colorspace.h b/core/fpdfapi/page/cpdf_colorspace.h
index ff10dfc..9bd7c8d 100644
--- a/core/fpdfapi/page/cpdf_colorspace.h
+++ b/core/fpdfapi/page/cpdf_colorspace.h
@@ -57,6 +57,11 @@
void GetDefaultColor(float* buf) const;
uint32_t CountComponents() const;
int GetFamily() const { return m_Family; }
+ bool IsSpecial() const {
+ return GetFamily() == PDFCS_SEPARATION || GetFamily() == PDFCS_DEVICEN ||
+ GetFamily() == PDFCS_INDEXED || GetFamily() == PDFCS_PATTERN;
+ }
+
virtual void GetDefaultValue(int iComponent,
float* value,
float* min,