missed conditions for flipping projection when drawing 2d images in opengl render targets

git-svn-id: svn://svn.code.sf.net/p/irrlicht/code/trunk@792 dfc29bdd-3216-0410-991c-e03cc46cb475

source/Irrlicht/COpenGLDriver.cpp

@@ -449,7 +449,7 @@ void COpenGLDriver::setTransform(E_TRANSFORMATION_STATE state, const core::matri
 		// flip z to compensate OpenGLs right-hand coordinate system
 		glmat[12] *= -1.0f;
 		// in render targets, flip the screen
-		if ( CurrentRendertargetSize.Width > 0 )
+		if ( CurrentRendertargetSize.Width != 0 )
 		{
 			glmat[5] *= -1.0f;
 			// because we flipped the screen, triangles are the wrong way around
@@ -1533,8 +1533,31 @@ void COpenGLDriver::setRenderStates2DMode(bool alpha, bool texture, bool alphaCh
 				Material.MaterialType < (s32)MaterialRenderers.size())
 			MaterialRenderers[Material.MaterialType].Renderer->OnUnsetMaterial();
 
+		GLfloat glmat[16];
+		core::matrix4 m;
+		createGLMatrix(glmat, m);
+
+		// in render targets, flip the screen
+		if ( CurrentRendertargetSize.Width != 0 )
+		{
+			glmat[5] *= -1.0f;
+			// because we flipped the screen, triangles are the wrong way around
+			if (ClockwiseWinding)
+			{
+				glFrontFace(GL_CCW);
+				ClockwiseWinding = false;
+			}
+		}
+		else
+		{
+			if (!ClockwiseWinding)
+			{
+				glFrontFace(GL_CW);
+				ClockwiseWinding = true;
+			}
+		}
 		glMatrixMode(GL_PROJECTION);
-		glLoadIdentity();
+		glLoadMatrixf(glmat);
 
 		glMatrixMode(GL_MODELVIEW);
 		glLoadIdentity();
@@ -1554,6 +1577,7 @@ void COpenGLDriver::setRenderStates2DMode(bool alpha, bool texture, bool alphaCh
 
 		glDisable(GL_ALPHA_TEST);
 		glCullFace(GL_BACK);
+
 	}
 
 	if (texture)