Added blend color to osg::TexEnv

src/osg/TexEnv.cpp

@@ -5,6 +5,7 @@ using namespace osg;
 TexEnv::TexEnv()
 {
     _mode = MODULATE;
+    _color.set(0.0f,0.0f,0.0f,0.0f);
 }
 
 
@@ -12,17 +13,11 @@ TexEnv::~TexEnv()
 {
 }
 
-void TexEnv::setMode( const Mode mode )
-{
-    _mode = (mode == DECAL ||
-        mode == MODULATE ||
-        mode == BLEND ||
-        mode == REPLACE ) ?
-        mode : MODULATE;
-}
-
-
 void TexEnv::apply(State&) const
 {
     glTexEnvi( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, _mode);
+    if (_mode==TexEnv::BLEND)
+    {
+        glTexEnvfv( GL_TEXTURE_ENV, GL_TEXTURE_ENV_COLOR, _color.ptr());
+    }
 }

src/osgPlugins/osg/TexEnv.cpp

@@ -38,6 +38,20 @@ bool TexEnv_readLocalData(Object& obj, Input& fr)
         iteratorAdvanced = true;
     }
 
+    if (fr.matchSequence("color %f %f %f %f"))
+    {
+        osg::Vec4 color;
+        fr[1].getFloat(color[0]);
+        fr[2].getFloat(color[1]);
+        fr[3].getFloat(color[2]);
+        fr[4].getFloat(color[3]);
+    
+        texenv.setColor(color);
+        
+        fr+=5;
+        iteratorAdvanced = true;
+    }
+
     return iteratorAdvanced;
 }
 
@@ -46,6 +60,18 @@ bool TexEnv_writeLocalData(const Object& obj, Output& fw)
     const TexEnv& texenv = static_cast<const TexEnv&>(obj);
 
     fw.indent() << "mode " << TexEnv_getModeStr(texenv.getMode()) << std::endl;
+    
+    switch(texenv.getMode())
+    {
+        case(TexEnv::DECAL):
+        case(TexEnv::MODULATE):
+        case(TexEnv::REPLACE):
+            break;
+        case(TexEnv::BLEND):
+        default:
+            fw.indent() << "color " << texenv.getColor() << std::endl;
+            break;
+    }
 
     return true;
 }