Added OpenGL ES support for the 'none' line join mode.

--HG--
branch : minor

src/modules/graphics/opengl/Polyline.h

@@ -43,12 +43,13 @@ namespace opengl
 class Polyline
 {
 public:
-	Polyline(GLenum mode = GL_TRIANGLE_STRIP)
+	Polyline(GLenum mode = GL_TRIANGLE_STRIP, bool quadindices = false)
 		: vertices(NULL)
 		, overdraw(NULL)
 		, vertex_count(0)
 		, overdraw_vertex_count(0)
 		, draw_mode(mode)
+		, use_quad_indices(quadindices)
 	{}
 	virtual ~Polyline();
 
@@ -90,6 +91,7 @@ protected:
 	size_t vertex_count;
 	size_t overdraw_vertex_count;
 	GLenum draw_mode;
+	bool use_quad_indices;
 
 }; // Polyline
 
@@ -102,7 +104,7 @@ class NoneJoinPolyline : public Polyline
 {
 public:
 	NoneJoinPolyline()
-		: Polyline(GL_QUADS)
+		: Polyline(GL_TRIANGLES, true)
 	{}
 
 	void render(const float *vertices, size_t count, float halfwidth, float pixel_size, bool draw_overdraw)