From 7a0442a388a381dc17cc23ca09e590a9b5a33d42 Mon Sep 17 00:00:00 2001
From: Robert Osfield <robert@openscenegraph.com>
Date: Thu, 28 Jun 2007 09:51:47 +0000
Subject: [PATCH] From Nikolaus Hanekamp, added support for osg::Multisample

---
 src/osgPlugins/ive/CMakeLists.txt       |  1 +
 src/osgPlugins/ive/DataInputStream.cpp  |  6 +++
 src/osgPlugins/ive/DataOutputStream.cpp |  5 +++
 src/osgPlugins/ive/Multisample.cpp      | 57 +++++++++++++++++++++++++
 src/osgPlugins/ive/Multisample.h        | 15 +++++++
 src/osgPlugins/ive/ReadWrite.h          |  1 +
 6 files changed, 85 insertions(+)
 create mode 100644 src/osgPlugins/ive/Multisample.cpp
 create mode 100644 src/osgPlugins/ive/Multisample.h

diff --git a/src/osgPlugins/ive/CMakeLists.txt b/src/osgPlugins/ive/CMakeLists.txt
index 7674a9640..2d678e459 100644
--- a/src/osgPlugins/ive/CMakeLists.txt
+++ b/src/osgPlugins/ive/CMakeLists.txt
@@ -55,6 +55,7 @@ Material.cpp
 MatrixTransform.cpp
 MultiSwitch.cpp
 MultiTextureControl.cpp
+Multisample.cpp
 Node.cpp
 Object.cpp
 OccluderNode.cpp
diff --git a/src/osgPlugins/ive/DataInputStream.cpp b/src/osgPlugins/ive/DataInputStream.cpp
index e33645ecf..514be005f 100644
--- a/src/osgPlugins/ive/DataInputStream.cpp
+++ b/src/osgPlugins/ive/DataInputStream.cpp
@@ -50,6 +50,8 @@
 #include "Scissor.h"
 #include "Image.h"
 #include "PointSprite.h"
+#include "Multisample.h"
+
 
 #include "Group.h"
 #include "MatrixTransform.h"
@@ -1087,6 +1089,10 @@ osg::StateAttribute* DataInputStream::readStateAttribute()
         attribute = new osg::PointSprite();
         ((ive::PointSprite*)(attribute))->read(this);
     }
+    else if(attributeID == IVEMULTISAMPLE){
+        attribute = new osg::Multisample();
+        ((ive::Multisample*)(attribute))->read(this);
+    }
     else if(attributeID == IVESTENCIL){
         attribute = new osg::Stencil();
         ((ive::Stencil*)(attribute))->read(this);
diff --git a/src/osgPlugins/ive/DataOutputStream.cpp b/src/osgPlugins/ive/DataOutputStream.cpp
index 49b168e13..53d52d131 100644
--- a/src/osgPlugins/ive/DataOutputStream.cpp
+++ b/src/osgPlugins/ive/DataOutputStream.cpp
@@ -53,6 +53,7 @@
 #include "Scissor.h"
 #include "Image.h"
 #include "PointSprite.h"
+#include "Multisample.h"
 
 #include "Group.h"
 #include "MatrixTransform.h"
@@ -771,6 +772,10 @@ void DataOutputStream::writeStateAttribute(const osg::StateAttribute* attribute)
         else if(dynamic_cast<const osg::PointSprite*>(attribute)){
             ((ive::PointSprite*)(attribute))->write(this);
         }
+        // This is a Multisample
+        else if(dynamic_cast<const osg::Multisample*>(attribute)){
+            ((ive::Multisample*)(attribute))->write(this);
+        }
 
         else{
             std::string className = attribute->className();
diff --git a/src/osgPlugins/ive/Multisample.cpp b/src/osgPlugins/ive/Multisample.cpp
new file mode 100644
index 000000000..d15909edf
--- /dev/null
+++ b/src/osgPlugins/ive/Multisample.cpp
@@ -0,0 +1,57 @@
+/**********************************************************************
+ *
+ *    FILE:            Multisample.cpp
+ *
+ *    DESCRIPTION:    Read/Write osg::Multisample in binary format to disk.
+ *
+ *    CREATED BY:     Nikolaus Hanekamp
+ *                    
+ *
+ *    HISTORY:        Created 15.06.2007
+ *
+ **********************************************************************/
+
+#include "Exception.h"
+#include "Multisample.h"
+#include "Object.h"
+
+using namespace ive;
+
+void Multisample::write(DataOutputStream* out){
+    // Write CullFace's identification.
+    out->writeInt(IVEMULTISAMPLE);
+    // If the osg class is inherited by any other class we should also write this to file.
+    osg::Object*  obj = dynamic_cast<osg::Object*>(this);
+    if(obj){
+        ((ive::Object*)(obj))->write(out);
+    }
+    else
+        throw Exception("Multisample::write(): Could not cast this osg::Multisample to an osg::Object.");
+    // Write Multisample's properties.
+    out->writeFloat(getCoverage());
+    out->writeBool(getInvert());
+    out->writeInt(getHint());
+}
+
+void Multisample::read(DataInputStream* in){
+    // Peek on Multisample's identification.
+    int id = in->peekInt();
+    if(id == IVEMULTISAMPLE){
+        // Read Multisample's identification.
+        id = in->readInt();
+        // If the osg class is inherited by any other class we should also read this from file.
+        osg::Object*  obj = dynamic_cast<osg::Object*>(this);
+        if(obj){
+            ((ive::Object*)(obj))->read(in);
+        }
+        else
+            throw Exception("Multisample::read(): Could not cast this osg::Multisample to an osg::Object.");
+        // Read Multisample's properties
+        setCoverage(in->readFloat());
+        setInvert(in->readBool());
+        setHint((Mode) in->readInt());
+    }
+    else{
+        throw Exception("Multisample::read(): Expected Multisample identification.");
+    }
+}
diff --git a/src/osgPlugins/ive/Multisample.h b/src/osgPlugins/ive/Multisample.h
new file mode 100644
index 000000000..0ea45775a
--- /dev/null
+++ b/src/osgPlugins/ive/Multisample.h
@@ -0,0 +1,15 @@
+#ifndef IVE_MULTISAMPLE
+#define IVE_MULTISAMPLE 1
+
+#include <osg/Multisample>
+#include "ReadWrite.h"
+
+namespace ive{
+class Multisample : public osg::Multisample, public ReadWrite {
+public:
+	void write(DataOutputStream* out);
+	void read(DataInputStream* in);
+};
+}
+
+#endif // IVE_VERTEX_PROGRAM
diff --git a/src/osgPlugins/ive/ReadWrite.h b/src/osgPlugins/ive/ReadWrite.h
index 48fe7cf6f..073868b21 100644
--- a/src/osgPlugins/ive/ReadWrite.h
+++ b/src/osgPlugins/ive/ReadWrite.h
@@ -81,6 +81,7 @@ namespace ive {
 #define IVEPOLYGONMODE                  0x00001129
 #define IVETEXTURERECTANGLE             0x00001130
 #define IVEPOINTSPRITE                  0x00001131
+#define IVEMULTISAMPLE                  0x00001132
 
 // Drawables
 #define IVEDRAWABLE                     0x00001000