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sampler g_tex;
float g_factor = 1.0f;
float4 g_blend_color = { 1, 1, 1, 1 };
float4 main(float2 uv : TEXCOORD) : COLOR
{
float4 color = tex2D(g_tex, uv);
color.a = 1;
color.r = color.r * g_factor + g_blend_color.r * (1.0f - g_factor);
color.g = color.g * g_factor + g_blend_color.g * (1.0f - g_factor);
color.b = color.b * g_factor + g_blend_color.b * (1.0f - g_factor);
return color;
}