Support generating index-color PNG files

Based on the request http://stackoverflow.com/questions/27036474/how-do-make-doxygen-generate-index-color-png-files for index colored png files, this functionality will be included in the newer versions (2.39) of dot.
The functionality -Tpng:cairo:gd will automatically be used by doxygen, though the file extension would be wrong (.png:cairo:gd).
With this patch the :cairo:gd is stripped from the image extension, but not from the -T of the dot command.
In the doxywizard the different possibilities are supplied as well. Note however that the DOT_IMAGE_FORMAT name is not checked when read from the Doxyfile so it is possible to use other renderer / formats as well due to the generic solution with getDot ImageExtension.

1 files changed, 2 insertions, 1 deletions

diff --git a/src/rtfdocvisitor.cpp b/src/rtfdocvisitor.cpp
index 20fbf53..7c7f607 100644
--- a/src/rtfdocvisitor.cpp
+++ b/src/rtfdocvisitor.cpp
@@ -1676,7 +1676,8 @@ void RTFDocVisitor::writeDotFile(const QCString &fileName)
   m_t << "{" << endl;
   m_t << rtf_Style_Reset;
   m_t << "\\pard \\qc {\\field\\flddirty {\\*\\fldinst INCLUDEPICTURE \"";
-  m_t << baseName << "." << Config_getEnum("DOT_IMAGE_FORMAT");
+  QCString imgExt = getDotImageExtension();
+  m_t << baseName << "." << imgExt;
   m_t << "\" \\\\d \\\\*MERGEFORMAT}{\\fldrslt IMAGE}}\\par" << endl;
   m_t << "}" << endl;
   m_lastIsPara=TRUE;