Cleaneer descriptor set layout and pipeline naming, enabled culling, fixed validation warnings for image extents

data/shaders/offscreen/phong.frag

@@ -0,0 +1,29 @@
+#version 450
+
+#extension GL_ARB_separate_shader_objects : enable
+#extension GL_ARB_shading_language_420pack : enable
+
+layout (location = 0) in vec3 inNormal;
+layout (location = 1) in vec3 inColor;
+layout (location = 2) in vec3 inEyePos;
+layout (location = 3) in vec3 inLightVec;
+
+layout (location = 0) out vec4 outFragColor;
+
+void main() 
+{
+	vec3 Eye = normalize(-inEyePos);
+	vec3 Reflected = normalize(reflect(-inLightVec, inNormal)); 
+
+	vec4 IAmbient = vec4(0.1, 0.1, 0.1, 1.0);
+	vec4 IDiffuse = vec4(max(dot(inNormal, inLightVec), 0.0));
+	float specular = 0.75;
+	vec4 ISpecular = vec4(0.0);
+	if (dot(inEyePos, inNormal) < 0.0)
+	{
+		ISpecular = vec4(0.5, 0.5, 0.5, 1.0) * pow(max(dot(Reflected, Eye), 0.0), 16.0) * specular; 
+	}
+
+	outFragColor = vec4((IAmbient + IDiffuse) * vec4(inColor, 1.0) + ISpecular);
+  
+}