/* Default Vertex shader */
void main_vertex
(
	float4 position	: POSITION,
	float4 color	: COLOR,
	float2 texCoord : TEXCOORD0,

    uniform float4x4 modelViewProj,

	out float4 oPosition : POSITION,
	out float4 oColor    : COLOR,
	out float2 otexCoord : TEXCOORD
)
{
	oPosition = mul(modelViewProj, position);
	oColor = color;
	otexCoord = texCoord;
}


struct output 
{
  float4 color    : COLOR;
};

struct input
{
  float2 video_size;
  float2 texture_size;
  float2 output_size;
};

output main_fragment(float2 texCoord : TEXCOORD0, uniform sampler2D decal : TEXUNIT0, uniform input IN)
{
	output OUT;
   	
	float winHeight = IN.output_size.y;
   float4 tex_color = tex2D(decal, texCoord);
   	
	OUT.color = (1.0 - 0.60 * floor(fmod(texCoord.y * winHeight, 2.0))) * tex_color;
	
	return OUT;   	
}