shadows basically works

src/core/render/renderer.h

@@ -57,6 +57,7 @@ class QGLENGINE_CORE_EXPORT Renderer: public RendererBase {
 		srLightSpotPass,
 		srFinalPass,
 		srTonemapPass,
+		srShadowPass,
 	};
 	enum OutBufferRole {
 		obrSolidOmni,
@@ -112,6 +113,7 @@ protected:
 	void reloadObjects();
 	void renderObjects(Scene & scene, RenderPass pass);
 	void renderLight(int first_wr_buff, bool clear_only);
+	void renderShadow(Light * light);
 
 	bool bindShader(ShaderRole role, QOpenGLShaderProgram ** ret = 0);
 	bool bindShader(QOpenGLShaderProgram * sp);