Fix the rendering of the KLN89 on the 2D panel that was broken during the move to osg. This is an interim step with the aim being to eventually use render-to-texture.

src/Cockpit/panel.cxx

@@ -914,7 +914,7 @@ FGSpecialInstrument::~FGSpecialInstrument ()
 void
 FGSpecialInstrument::draw (osg::State& state)
 {
-  complex->draw();
+  complex->draw(state);
 }
 
 

src/Instrumentation/dclgps.cxx

@@ -356,9 +356,8 @@ DCLGPS::~DCLGPS() {
 	// TODO - may need to delete the approach database!!
 }
 
-void DCLGPS::draw() {
-	//cout << "draw called!\n";
-	_instrument->draw();
+void DCLGPS::draw(osg::State& state) {
+	_instrument->draw(state);
 }
 
 void DCLGPS::init() {

src/Instrumentation/dclgps.hxx

@@ -251,7 +251,7 @@ public:
 	DCLGPS(RenderArea2D* instrument);
 	virtual ~DCLGPS() = 0;
 	
-	virtual void draw();
+	virtual void draw(osg::State& state);
 	
 	virtual void init();
 	virtual void bind();

src/Instrumentation/render_area_2d.cxx

@@ -62,24 +62,31 @@ RenderArea2D::RenderArea2D(int logx, int logy, int sizex, int sizey, int posx, i
 	_ra2d_debug = false;
 }
 
-void RenderArea2D::draw() {
-#if 0
-    glDisable(GL_TEXTURE_2D);
-	/*
-    glColor3f(1, 1, 0);
+void RenderArea2D::draw(osg::State& state) {
 	
-	float x1 = _posx;
-	float x2 = _posx + _sizex;
-	float y1 = _posy;
-	float y2 = _posy + _sizey;
+	static osg::ref_ptr<osg::StateSet> renderArea2DStateSet;
+	if(!renderArea2DStateSet.valid()) {
+		renderArea2DStateSet = new osg::StateSet;
+		renderArea2DStateSet->setTextureMode(0, GL_TEXTURE_2D, osg::StateAttribute::OFF);
+		renderArea2DStateSet->setMode(GL_LIGHTING, osg::StateAttribute::OFF);
+	}
+	
+	state.pushStateSet(renderArea2DStateSet.get());
+	state.apply();
+	state.setActiveTextureUnit(0);
+	state.setClientActiveTextureUnit(0);
+	
+	// DCL - the 2 lines below are copied verbatim from the hotspot drawing code.
+	// I am not sure if they are needed here or not.
+	glPushAttrib(GL_ENABLE_BIT);
+	glDisable(GL_COLOR_MATERIAL);
+	
+	// FIXME - disabling all clip planes causes bleed-through through the splash screen.
+	glDisable(GL_CLIP_PLANE0);
+	glDisable(GL_CLIP_PLANE1);
+	glDisable(GL_CLIP_PLANE2);
+	glDisable(GL_CLIP_PLANE3);
 
-	glBegin(GL_LINE_LOOP);
-    glVertex2f(x1, y1);
-    glVertex2f(x1, y2);
-    glVertex2f(x2, y2);
-    glVertex2f(x2, y1);
-    glEnd();
-	*/
 	oldDrawBackground();
 	
 	for(unsigned int i = 0; i < drawing_list.size(); ++i) {
@@ -101,8 +108,12 @@ void RenderArea2D::draw() {
 		}
 	}
 	
-	glEnable(GL_TEXTURE_2D);
-#endif
+	glPopAttrib();
+	
+	state.popStateSet();
+	state.apply();
+	state.setActiveTextureUnit(0);
+	state.setClientActiveTextureUnit(0);
 }
 
 // Set clipping region in logical units
@@ -336,34 +347,24 @@ void RenderArea2D::Flush() {
 // -----------------------------------------
 
 void RenderArea2D::doSetColor( const float *rgba ) {
-  //OSGFIXME
-#if 0
   glMaterialfv(GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE, rgba);
   glColor4fv( rgba );
-#endif
 }
 
 void RenderArea2D::doDrawQuad( const sgVec2 *p, const sgVec3 *normals ) {
-	//cout << "doDrawQuad: " << *p[0] << ", " << *(p[0]+1) << ", " << *p[1] << ", " << *(p[1]+1) << ", " << *p[2] << ", " << *p([2]+1) << ", " << *p[3] << ", " << *p([3]+1) <<'\n';
-  //OSGFIXME
-#if 0
   glBegin(GL_QUADS);
   glNormal3fv( normals[0] ); glVertex2fv( p[0] );
   glNormal3fv( normals[1] ); glVertex2fv( p[1] );
   glNormal3fv( normals[2] ); glVertex2fv( p[2] );
   glNormal3fv( normals[3] ); glVertex2fv( p[3] );
   glEnd();
-#endif
 }
 
 void RenderArea2D::doDrawQuad( const sgVec2 *p, const sgVec3 *normals, const sgVec4 *color ) {
-  //OSGFIXME
-#if 0
   glBegin(GL_QUADS);
     glColor4fv( color[0] );glNormal3fv( normals[0] ); glVertex2fv( p[0] );
     glColor4fv( color[1] );glNormal3fv( normals[1] ); glVertex2fv( p[1] );
     glColor4fv( color[2] );glNormal3fv( normals[2] ); glVertex2fv( p[2] );
     glColor4fv( color[3] );glNormal3fv( normals[3] ); glVertex2fv( p[3] );
   glEnd();
-#endif
 }

src/Instrumentation/render_area_2d.hxx

@@ -28,6 +28,10 @@
 #  include <config.h>
 #endif
 
+#include <osg/ref_ptr>
+#include <osg/State>
+#include <osg/StateSet>
+
 #include <plib/sg.h>
 #include <simgear/compiler.h>
 
@@ -56,7 +60,7 @@ public:
 	RenderArea2D(int logx, int logy, int sizex, int sizey, int posx, int posy);
 	~RenderArea2D();
 	
-	void draw();
+	void draw(osg::State& state);
 	
 	void SetPixelColor(const float* rgba);
 	void SetBackgroundColor(const float* rgba);