From 9e75926338fcb7eb4732acd54af4864b151b8d93 Mon Sep 17 00:00:00 2001
From: Robert Osfield <robert@openscenegraph.com>
Date: Mon, 13 Jan 2020 13:41:37 +0000
Subject: [PATCH] Added support for using CurrentCodePage functionality with
 osgText::String To the DXF plugin added Option string support for using
 CurrentCodePage|WidePage, UTF8, UTF16, UTF32 and FontFile=filename

---
 include/osgText/String                 |  3 +-
 src/osgPlugins/dxf/ReaderWriterDXF.cpp | 69 ++++++++++++++++++++++++++
 src/osgPlugins/dxf/dxfEntity.cpp       |  3 +-
 src/osgPlugins/dxf/dxfEntity.h         |  9 +++-
 src/osgText/String.cpp                 | 10 +++-
 5 files changed, 89 insertions(+), 5 deletions(-)

diff --git a/include/osgText/String b/include/osgText/String
index 3fb51e4ae..cc89c72a7 100644
--- a/include/osgText/String
+++ b/include/osgText/String
@@ -60,7 +60,8 @@ class OSGTEXT_EXPORT String : public VectorUInt
             ENCODING_UTF32,                     /// 32-bit signature
             ENCODING_UTF32_BE,                  /// 32-bit big-endian
             ENCODING_UTF32_LE,                  /// 32-bit little-endian
-            ENCODING_SIGNATURE                  /// detect encoding from signature
+            ENCODING_SIGNATURE,                 /// detect encoding from signature
+            ENCODING_CURRENT_CODE_PAGE          /// Use Windows Current Code Page ecoding
         };
 
 
diff --git a/src/osgPlugins/dxf/ReaderWriterDXF.cpp b/src/osgPlugins/dxf/ReaderWriterDXF.cpp
index a552c754d..c45e792b7 100644
--- a/src/osgPlugins/dxf/ReaderWriterDXF.cpp
+++ b/src/osgPlugins/dxf/ReaderWriterDXF.cpp
@@ -36,6 +36,13 @@ public:
     ReaderWriterdxf()
     {
         supportsExtension("dxf","Autodesk DXF format");
+
+        supportsOption("UTF8", "Assuming UTF8 encoding of dxf text");
+        supportsOption("UTF16", "Assuming UTF16 encoding of dxf text");
+        supportsOption("UTF32", "Assuming UTF32 encoding of dxf text");
+        supportsOption("SIGNATURE", "Detrmine encoding of dxf text from it's signative");
+        supportsOption("WideChar | CurrentCodePage", "Detrmine encoding of dxf text using CurrentCodePage (Windows only.)");
+        supportsOption("FontFile=<fontfile>", "Set the font file for dxf text");
     }
 
     virtual const char* className() const { return "Autodesk DXF Reader/Writer"; }
@@ -143,6 +150,68 @@ ReaderWriterdxf::readNode(const std::string& filename, const osgDB::ReaderWriter
             dxfEntity::getRegistryEntity("ARC")->setAccuracy(true,maxError,improveAccuracyOnly);
             dxfEntity::getRegistryEntity("CIRCLE")->setAccuracy(true,maxError,improveAccuracyOnly);
         } // accuracy options exists
+
+        {
+            std::istringstream iss(options->getOptionString());
+            std::string opt;
+            while (iss >> opt)
+            {
+                // split opt into pre= and post=
+                std::string pre_equals;
+                std::string post_equals;
+
+                size_t found = opt.find("=");
+                if (found != std::string::npos)
+                {
+                    pre_equals = opt.substr(0, found);
+                    post_equals = opt.substr(found + 1);
+                }
+                else
+                {
+                    pre_equals = opt;
+                }
+
+                if (pre_equals == "FontFile")
+                {
+                    std::string fontFile = post_equals.c_str();
+                    if (!fontFile.empty())
+                    {
+                        dynamic_cast<dxfText*>(dxfEntity::getRegistryEntity("TEXT"))->font = fontFile;
+
+                        OSG_INFO<<"ReaderWriteDXF : Set fontFile to "<<fontFile<<std::endl;
+                    }
+                    else
+                    {
+                        OSG_NOTICE << "Warning: invalid FontFile value: " << post_equals << std::endl;
+                    }
+                }
+                else if (pre_equals=="UTF8")
+                {
+                    dynamic_cast<dxfText*>(dxfEntity::getRegistryEntity("TEXT"))->encoding = osgText::String::ENCODING_UTF8;
+                    OSG_INFO<<"ReaderWriteDXF : Set encoding to osgText::String::ENCODING_UTF8"<<std::endl;
+                }
+                else if (pre_equals=="UTF16")
+                {
+                    dynamic_cast<dxfText*>(dxfEntity::getRegistryEntity("TEXT"))->encoding = osgText::String::ENCODING_UTF16;
+                    OSG_INFO<<"ReaderWriteDXF : Set encoding to osgText::String::ENCODING_UTF16"<<std::endl;
+                }
+                else if (pre_equals=="UTF32")
+                {
+                    dynamic_cast<dxfText*>(dxfEntity::getRegistryEntity("TEXT"))->encoding = osgText::String::ENCODING_UTF32;
+                    OSG_INFO<<"ReaderWriteDXF : Set encoding to osgText::String::ENCODING_UTF32"<<std::endl;
+                }
+                else if (pre_equals=="SIGNATURE")
+                {
+                    dynamic_cast<dxfText*>(dxfEntity::getRegistryEntity("TEXT"))->encoding = osgText::String::ENCODING_SIGNATURE;
+                    OSG_INFO<<"ReaderWriteDXF : Set encoding to osgText::String::ENCODING_SIGNATURE"<<std::endl;
+                }
+                else if (pre_equals=="WideChar" || pre_equals=="CurrentCodePage")
+                {
+                    dynamic_cast<dxfText*>(dxfEntity::getRegistryEntity("TEXT"))->encoding = osgText::String::ENCODING_CURRENT_CODE_PAGE;
+                    OSG_INFO<<"ReaderWriteDXF : Set encoding to osgText::String::ENCODING_CURRENT_CODE_PAGE"<<std::endl;
+                }
+            }
+        }
     } // options exist
 
 
diff --git a/src/osgPlugins/dxf/dxfEntity.cpp b/src/osgPlugins/dxf/dxfEntity.cpp
index 062974ac6..1f0b45e40 100644
--- a/src/osgPlugins/dxf/dxfEntity.cpp
+++ b/src/osgPlugins/dxf/dxfEntity.cpp
@@ -911,9 +911,8 @@ dxfText::drawScene(scene* sc)
 
     ref_ptr<osgText::Text> _text = new osgText::Text;
     _text->setText(_string, encoding);
-    _text->setFont(font);
-
     _text->setCharacterSize( _height, 1.0/_xscale );
+    _text->setFont(font);
 
     Quat qr( DegreesToRadians(_rotation), Z_AXIS );
 
diff --git a/src/osgPlugins/dxf/dxfEntity.h b/src/osgPlugins/dxf/dxfEntity.h
index ee553cb3d..96a915491 100644
--- a/src/osgPlugins/dxf/dxfEntity.h
+++ b/src/osgPlugins/dxf/dxfEntity.h
@@ -307,7 +307,14 @@ public:
         _vjustify(0) {}
 
     virtual ~dxfText() {}
-    virtual dxfBasicEntity*        create() { return new dxfText; }
+    virtual dxfBasicEntity* create()
+    {
+        dxfText* text = new dxfText;
+        text->encoding = encoding;
+        text->font = font;
+        return text;
+    }
+
     virtual const char*            name() { return "TEXT"; }
     virtual void                   assign(dxfFile* dxf, codeValue& cv);
     virtual void                   drawScene(scene* sc);
diff --git a/src/osgText/String.cpp b/src/osgText/String.cpp
index 18529998c..32f95f94f 100644
--- a/src/osgText/String.cpp
+++ b/src/osgText/String.cpp
@@ -3,6 +3,8 @@
 #include <osg/Notify>
 #include <osg/Math>
 
+#include <osgDB/ConvertUTF>
+
 #include <iterator>
 
 using namespace osgText;
@@ -275,8 +277,14 @@ void String::set(const wchar_t* text)
     }
 }
 
-void String::set(const std::string& text,Encoding encoding)
+void String::set(const std::string& text, Encoding encoding)
 {
+    if (encoding==ENCODING_CURRENT_CODE_PAGE)
+    {
+        set(osgDB::convertStringFromCurrentCodePageToUTF8(text), ENCODING_UTF8);
+        return;
+    }
+
     clear();
 
     look_ahead_iterator itr(text);