pdfium: better suport for annotations and some fixes

Added suport to import FreeText annotations. Added some suport to export
graphical annotations. Fixed some color issues to be more inline with
the pdfium library.

Change-Id: I7371595ebb95594ee765ae532ca7c7d4f0499592
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/152606
Tested-by: Jenkins
Reviewed-by: Andras Timar <andras.timar@collabora.com>

1 files changed, 18 insertions, 6 deletions

diff --git a/vcl/source/pdf/PDFiumLibrary.cxx b/vcl/source/pdf/PDFiumLibrary.cxx
index e0562c4dbf9b..c445e5e5ad98 100644
--- a/vcl/source/pdf/PDFiumLibrary.cxx
+++ b/vcl/source/pdf/PDFiumLibrary.cxx
@@ -1126,24 +1126,36 @@ basegfx::B2DRectangle PDFiumAnnotationImpl::getRectangle()
 
 Color PDFiumAnnotationImpl::getColor()
 {
-    Color aColor = COL_TRANSPARENT;
     unsigned int nR, nG, nB, nA;
     if (FPDFAnnot_GetColor(mpAnnotation, FPDFANNOT_COLORTYPE_Color, &nR, &nG, &nB, &nA))
     {
-        aColor = Color(ColorAlpha, nA, nR, nG, nB);
+        return Color(ColorAlpha, nA, nR, nG, nB);
     }
-    return aColor;
+    // FPDFAnnot_GetColor can return false if there is an appearance stream
+    // So we search for a color with getStrokeColor
+    for (int i = 0; i < getObjectCount(); ++i)
+    {
+        if (getObject(i)->getType() == PDFPageObjectType::Path)
+            return getObject(i)->getStrokeColor();
+    }
+    return COL_TRANSPARENT;
 }
 
 Color PDFiumAnnotationImpl::getInteriorColor()
 {
-    Color aColor = COL_TRANSPARENT;
     unsigned int nR, nG, nB, nA;
     if (FPDFAnnot_GetColor(mpAnnotation, FPDFANNOT_COLORTYPE_InteriorColor, &nR, &nG, &nB, &nA))
     {
-        aColor = Color(ColorAlpha, nA, nR, nG, nB);
+        return Color(ColorAlpha, nA, nR, nG, nB);
     }
-    return aColor;
+    // FPDFAnnot_GetColor can return false if there is an appearance stream
+    // So we search for a color with getFillColor
+    for (int i = 0; i < getObjectCount(); ++i)
+    {
+        if (getObject(i)->getType() == PDFPageObjectType::Path)
+            return getObject(i)->getFillColor();
+    }
+    return COL_TRANSPARENT;
 }
 
 size_t PDFiumAnnotationImpl::getAttachmentPointsCount()