Fold layout transitions into subpass (Refs #155), refactoring of offscreen render pass

data/shaders/radialblur/colorpass.vert

@@ -10,7 +10,6 @@ layout (binding = 0) uniform UBO
 {
 	mat4 projection;
 	mat4 model;
-	vec4 glowColor;
 } ubo;
 
 layout (location = 0) out vec3 outColor;
@@ -22,8 +21,6 @@ out gl_PerVertex
 
 void main() 
 {
-	{
-		outColor = inColor;
-	}
+	outColor = inColor;
 	gl_Position = ubo.projection * ubo.model * inPos;
 }

data/shaders/radialblur/radialblur.frag

@@ -7,8 +7,6 @@ layout (binding = 1) uniform sampler2D samplerColor;
 
 layout (binding = 2) uniform UBO 
 {
-	int texWidth;
-	int texHeight;
 	float radialBlurScale;
 	float radialBlurStrength;
 	vec2 radialOrigin;
@@ -20,7 +18,8 @@ layout (location = 0) out vec4 outFragColor;
 
 void main() 
 {
-	vec2 radialSize = vec2(1.0 / ubo.texWidth, 1.0 / ubo.texHeight); 
+	ivec2 texDim = textureSize(samplerColor, 0);
+	vec2 radialSize = vec2(1.0 / texDim.s, 1.0 / texDim.t); 
 	
 	vec2 UV = inUV;