add initial examples, replacing the 'Demos/Demos3'. Will make it work cross-platform, OpenGL3/OpenGL2 and add more examples to it.

examples/OpenGLWindow/GLPrimitiveRenderer.h

@@ -0,0 +1,67 @@
+#ifndef _GL_PRIMITIVE_RENDERER_H
+#define _GL_PRIMITIVE_RENDERER_H
+
+//#include "OpenGLInclude.h"
+
+struct PrimVec2
+{
+	PrimVec2(float x, float y)
+	{
+		p[0] = x;
+		p[1] = y;
+	}
+	float p[2];
+};
+
+struct PrimVec4
+{
+	PrimVec4() {}
+	PrimVec4(float x,float y, float z, float w)
+	{
+		p[0] = x;
+		p[1] = y;
+		p[2] = z;
+		p[3] = w;
+        
+	}
+    
+	float p[4];
+};
+
+typedef struct
+{
+    PrimVec4 position;
+    PrimVec4 colour;
+	PrimVec2 uv;
+} PrimVertex;
+
+
+class GLPrimitiveRenderer
+{
+    int m_screenWidth;
+    int m_screenHeight;
+
+	struct PrimInternalData*	m_data;
+    
+    void loadBufferData();
+    
+public:
+    
+    GLPrimitiveRenderer(int screenWidth, int screenHeight);
+    virtual ~GLPrimitiveRenderer();
+	
+	void drawRect(float x0, float y0, float x1, float y1, float color[4]);
+    void drawTexturedRect(float x0, float y0, float x1, float y1, float color[4], float u0,float v0, float u1, float v1, int useRGBA=0);
+	void drawTexturedRect3D(const PrimVertex& v0,const PrimVertex& v1,const PrimVertex& v2,const PrimVertex& v3,float viewMat[16],float projMat[16], bool useRGBA = true);
+    void drawLine();//float from[4], float to[4], float color[4]);
+    void setScreenSize(int width, int height);
+    
+	PrimInternalData*	getData()
+	{
+		return m_data;
+	}
+
+};
+
+#endif//_GL_PRIMITIVE_RENDERER_H
+