From 79ac5232cf029f3d40543641e92daa8aaa1c9f7c Mon Sep 17 00:00:00 2001
From: albert-github <albert.tests@gmail.com>
Date: Tue, 5 Jun 2018 11:46:03 +0200
Subject: Add formula (images) to RTF output

The RTF output was lacking the possibility to have formulas in it (were written as text). This patch generates the images analogous to the HTML, non MATHJAX, version and includes them in the output.
---
 doc/formulas.doc      |  5 ++---
 src/doxygen.cpp       |  6 ++++++
 src/rtfdocvisitor.cpp | 16 ++++++++++++++--
 3 files changed, 22 insertions(+), 5 deletions(-)

diff --git a/doc/formulas.doc b/doc/formulas.doc
index ee4ff61..f505155 100644
--- a/doc/formulas.doc
+++ b/doc/formulas.doc
@@ -17,9 +17,8 @@
 /*! \page formulas Including formulas 
 
 Doxygen allows you to put \LaTeX formulas in the
-output (this works only for the HTML and \LaTeX output, 
-not for the RTF nor for the man page output). To be able to include 
-formulas (as images) in the HTML documentation, you will also need to 
+output (this works only for the HTML, \LaTeX and RTF output. To be able to include 
+formulas (as images) in the HTML and RTF documentation, you will also need to 
 have the following tools installed
 <ul>
 <li>\c latex: the \LaTeX compiler, needed to parse the formulas. 
diff --git a/src/doxygen.cpp b/src/doxygen.cpp
index 263b59f..bc244b7 100644
--- a/src/doxygen.cpp
+++ b/src/doxygen.cpp
@@ -11558,6 +11558,12 @@ void generateOutput()
     Doxygen::formulaList->generateBitmaps(Config_getString(HTML_OUTPUT));
     g_s.end();
   }
+  if (Doxygen::formulaList->count()>0 && generateRtf)
+  {
+    g_s.begin("Generating bitmaps for formulas in RTF...\n");
+    Doxygen::formulaList->generateBitmaps(Config_getString(RTF_OUTPUT));
+    g_s.end();
+  }
 
   if (Config_getBool(SORT_GROUP_NAMES))
   {
diff --git a/src/rtfdocvisitor.cpp b/src/rtfdocvisitor.cpp
index c85b638..7e3f104 100644
--- a/src/rtfdocvisitor.cpp
+++ b/src/rtfdocvisitor.cpp
@@ -526,9 +526,21 @@ void RTFDocVisitor::visit(DocIncOperator *op)
 void RTFDocVisitor::visit(DocFormula *f)
 {
   if (m_hide) return;
-  // TODO: do something sensible here, like including a bitmap
   DBG_RTF("{\\comment RTFDocVisitor::visit(DocFormula)}\n");
-  m_t << f->text();
+  bool bDisplay = !f->isInline();
+  if (bDisplay) 
+  {
+    m_t << "\\par";
+    m_t << "{";
+    m_t << "\\pard\\plain";
+    m_t << "\\pard";
+    m_t << "\\qc";
+  }
+  m_t << "{ \\field\\flddirty {\\*\\fldinst  INCLUDEPICTURE \"" << f->relPath() << f->name() << ".png\" \\\\d \\\\*MERGEFORMAT}{\\fldrslt Image}}";
+  if (bDisplay) 
+  {
+    m_t << "\\par}";
+  }
   m_lastIsPara=FALSE;
 }
 
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