tdf#136836 emfio: speed up import of EMF import when the orig PDF is available

The PPTX bugdoc has a 17MB EMF file, which has enough instructions to
keep Impress busy for minutes during import.

Take advantage of the detail that this EMF has a
EMR_COMMENT_MULTIFORMATS record that contains the original PDF, which
can be rendered much faster:

- old cost: 122.153 seconds
- new cost: 1.952 seconds (1.6% of baseline)

Change-Id: I38efc1c24e21a7622377b9e1c1938ebee826bae9
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/102918
Reviewed-by: Miklos Vajna <vmiklos@collabora.com>
Tested-by: Jenkins

1 files changed, 4 insertions, 0 deletions

diff --git a/emfio/inc/emfreader.hxx b/emfio/inc/emfreader.hxx
index 90d8969ae70c..75a77211ea61 100644
--- a/emfio/inc/emfreader.hxx
+++ b/emfio/inc/emfreader.hxx
@@ -32,6 +32,8 @@ namespace emfio
         bool        mbRecordPath : 1;
         bool        mbEMFPlus : 1;
         bool        mbEMFPlusDualMode : 1;
+        /// An other format is read already, can ignore actual EMF data.
+        bool mbReadOtherGraphicFormat = false;
 
         bool        ReadHeader();
         // reads and converts the rectangle
@@ -43,6 +45,8 @@ namespace emfio
 
         bool ReadEnhWMF();
         void ReadGDIComment(sal_uInt32 nCommentId);
+        /// Parses EMR_COMMENT_MULTIFORMATS.
+        void ReadMultiformatsComment();
 
     private:
         template <class T> void ReadAndDrawPolyPolygon(sal_uInt32 nNextPos);