mixin SpriteCommon
{
	#ifndef ANIMATED
		#define ANIMATED 0
	#endif

	#ifndef TRANSPARENCY
		#define TRANSPARENCY 0
	#endif

	#ifndef UV
		#define UV 0
	#endif

	#if TRANSPARENCY
	blend
	{
		target	
		{
			enabled = true;
			#if TRANSPARENCY == 1
			color = { srcA, srcIA, add };
			#else
			color = { one, srcIA, add };
			#endif
			
			#if ALPHA
			writemask = A;
			#else
			writemask = RGB;
			#endif
		};
	};	
	#endif
	
	#if ALPHA
	stencil
	{
		enabled = true;
		readmask = 0x1;
		writemask = 0x1;
		
		front = { keep, keep, inc, eq };
		reference = 0x0;
	};
	#endif

	depth
	{
		read = false;
		write = false;
	};
	
	code
	{
		cbuffer GUIParams
		{
			float4x4 gWorldTransform;
			float gInvViewportWidth;
			float gInvViewportHeight;
			float gViewportYFlip;
			float4 gTint;
			float4 gUVSizeOffset;
		}	

		void vsmain(
			in float3 inPos : POSITION
			#if UV
			, in float2 uv : TEXCOORD0
			#endif
			, out float4 oPosition : SV_Position
			#if UV
			, out float2 oUv : TEXCOORD0
			#endif
			)
		{
			float4 tfrmdPos = mul(gWorldTransform, float4(inPos.xy, 0, 1));

			float tfrmdX = -1.0f + (tfrmdPos.x * gInvViewportWidth);
			float tfrmdY = (1.0f - (tfrmdPos.y * gInvViewportHeight)) * gViewportYFlip;

			oPosition = float4(tfrmdX, tfrmdY, 0, 1);
			
			#if UV
			#if ANIMATED
			oUv = uv * gUVSizeOffset.xy + gUVSizeOffset.zw;
			#else
			oUv = uv;
			#endif
			#endif
		}
	};
};