#include "shared.effect"
#include "lut.effect"

//------------------------------------------------------------------------------
// Uniforms
//------------------------------------------------------------------------------
uniform texture2d image;
uniform texture2d lut;
uniform int4   lut_params_0; // [size, grid_size, texture_size, 0]
uniform float4 lut_params_1; // [inverse_size, inverse_grid_size, inverse_texture_size, half_texel]

//------------------------------------------------------------------------------
// Functionality
//------------------------------------------------------------------------------
float4 PSConsumeLUT(VertexData vtx) : TARGET {
	float4 c = image.Sample(LinearClampSampler, vtx.uv);
	return float4(sample_lut2(c.rgb, lut, lut_params_0, lut_params_1), c.a);
};

technique Draw {
	pass {
		vertex_shader = DefaultVertexShader(vtx);
		pixel_shader  = PSConsumeLUT(vtx);
	}
}