pdfium: Support for InkStrokes and Vertices

This extends PDFium with getting InkStrokes and Vertices for
annotations, which wasn't implemented before, and adds support to
PDFium wrapper in LibreOffice.

Change-Id: I570d53038a59ab830fcd5639583c75cf8adda86c
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/103885
Tested-by: Jenkins
Reviewed-by: Tomaž Vajngerl <quikee@gmail.com>

2 files changed, 46 insertions, 0 deletions

diff --git a/vcl/qa/cppunit/PDFiumLibraryTest.cxx b/vcl/qa/cppunit/PDFiumLibraryTest.cxx
index 547c59872216..3fc4ba86a6c3 100644
--- a/vcl/qa/cppunit/PDFiumLibraryTest.cxx
+++ b/vcl/qa/cppunit/PDFiumLibraryTest.cxx
@@ -334,6 +334,10 @@ void PDFiumLibraryTest::testAnnotationsDifferentTypes()
         CPPUNIT_ASSERT_EQUAL(0, pAnnotation->getObjectCount());
         OUString aContentsString = pAnnotation->getString(vcl::pdf::constDictionaryKeyContents);
         CPPUNIT_ASSERT_EQUAL(OUString("Freehand Text"), aContentsString);
+        CPPUNIT_ASSERT_EQUAL(size_t(1), pAnnotation->getInkStrokes().size());
+        auto const& aInkStrokes = pAnnotation->getInkStrokes();
+        auto const& aPoints = aInkStrokes[0];
+        CPPUNIT_ASSERT_EQUAL(size_t(74), aPoints.size());
     }
 
     {
@@ -353,6 +357,8 @@ void PDFiumLibraryTest::testAnnotationsDifferentTypes()
         CPPUNIT_ASSERT_EQUAL(true, pAnnotation->hasKey("Vertices"));
         OUString aContentsString = pAnnotation->getString(vcl::pdf::constDictionaryKeyContents);
         CPPUNIT_ASSERT_EQUAL(OUString("Polygon Text"), aContentsString);
+        auto const& aVertices = pAnnotation->getVertices();
+        CPPUNIT_ASSERT_EQUAL(size_t(3), aVertices.size());
     }
 
     {
diff --git a/vcl/source/pdf/PDFiumLibrary.cxx b/vcl/source/pdf/PDFiumLibrary.cxx
index 136a40786112..dc31eb4fb952 100644
--- a/vcl/source/pdf/PDFiumLibrary.cxx
+++ b/vcl/source/pdf/PDFiumLibrary.cxx
@@ -465,6 +465,46 @@ OUString PDFiumAnnotation::getString(OString const& rKey)
     return rString;
 }
 
+std::vector<std::vector<basegfx::B2DPoint>> PDFiumAnnotation::getInkStrokes()
+{
+    std::vector<std::vector<basegfx::B2DPoint>> aB2DPointList;
+    int nInkStrokes = FPDFAnnot_GetInkStrokeCount(mpAnnotation);
+    for (int i = 0; i < nInkStrokes; i++)
+    {
+        std::vector<basegfx::B2DPoint> aB2DPoints;
+        int nPoints = FPDFAnnot_GetInkStrokePointCount(mpAnnotation, i);
+        if (nPoints)
+        {
+            std::vector<FS_POINTF> aPoints(nPoints);
+            if (FPDFAnnot_GetInkStrokePoints(mpAnnotation, i, aPoints.data()))
+            {
+                for (auto const& rPoint : aPoints)
+                {
+                    aB2DPoints.emplace_back(rPoint.x, rPoint.y);
+                }
+                aB2DPointList.push_back(aB2DPoints);
+            }
+        }
+    }
+    return aB2DPointList;
+}
+
+std::vector<basegfx::B2DPoint> PDFiumAnnotation::getVertices()
+{
+    std::vector<basegfx::B2DPoint> aB2DPoints;
+    int nPoints = FPDFAnnot_GetVerticesCount(mpAnnotation);
+    if (nPoints)
+    {
+        std::vector<FS_POINTF> aPoints(nPoints);
+        if (FPDFAnnot_GetVertices(mpAnnotation, aPoints.data()))
+        {
+            for (auto const& rPoint : aPoints)
+                aB2DPoints.emplace_back(rPoint.x, rPoint.y);
+        }
+    }
+    return aB2DPoints;
+}
+
 std::unique_ptr<PDFiumAnnotation> PDFiumAnnotation::getLinked(OString const& rKey)
 {
     std::unique_ptr<PDFiumAnnotation> pPDFiumAnnotation;