Fix partial information printed with blank window covering the center

core/src/fpdfapi/fpdf_page/fpdf_page_parser.cpp

Index: core/src/fpdfapi/fpdf_page/fpdf_page_parser.cpp
diff --git a/core/src/fpdfapi/fpdf_page/fpdf_page_parser.cpp b/core/src/fpdfapi/fpdf_page/fpdf_page_parser.cpp
index 865c6b71169af03a9c2900594de9801caaef6a0d..0330487311b5a3c9612abf6728bd875a9d3217ef 100644
--- a/core/src/fpdfapi/fpdf_page/fpdf_page_parser.cpp
+++ b/core/src/fpdfapi/fpdf_page/fpdf_page_parser.cpp
@@ -710,6 +710,8 @@ void CPDF_StreamContentParser::Handle_ExecuteXObject() {
     CPDF_ImageObject* pObj = AddImage(pXObject, NULL, FALSE);
     m_LastImageName = name;
     m_pLastImage = pObj->m_pImage;
+    if (!m_pObjectList->m_bHasImageMask && m_pLastImage->IsMask())

[Lei Zhang, 2015/12/28 19:08:18]

Can't this block reduce down to the following?

m_pObjectList->m_bHasImageMask = m_pLastImage->IsMask();

[jun_fang, 2015/12/28 23:33:05]

Do you prefer the following change?

if (!m_pObjectList->m_bHasImageMask)
  m_pObjectList->m_bHasImageMask = m_pLastImage->IsMask();

[Lei Zhang, 2015/12/28 23:42:57]

Sure, I retract my suggestion because it can incorrectly set the
|m_bHasImageMask| value to false.

[jun_fang, 2015/12/29 02:13:27]

Done.

+      m_pObjectList->m_bHasImageMask = TRUE;
   } else if (type == "Form") {
     AddForm(pXObject);
   } else {