#ifndef __HALIDE_VARYING_ATTRIBUTES__H
#define __HALIDE_VARYING_ATTRIBUTES__H
/** \file
* This file contains functions that detect expressions in a GLSL scheduled
* function that may be evaluated per vertex and interpolated across the domain
* instead of being evaluated at each pixel location across the image.
*/
#include "IR.h"
namespace Halide {
namespace Internal {
/** find_linear_expressions(Stmt s) identifies expressions that may be moved
* out of the generated fragment shader into a varying attribute. These
* expressions are tagged by wrapping them in a glsl_varying intrinsic
*/
Stmt find_linear_expressions(Stmt s);
/** Compute a set of 2D mesh coordinates based on the behavior of varying
* attribute expressions contained within a GLSL scheduled for loop. This
* method is called during lowering to extract varying attribute
* expressions and generate code to evalue them at each mesh vertex
* location. The operation is performed on the host before the draw call
* to invoke the shader
*/
Stmt setup_gpu_vertex_buffer(Stmt s);
}
}
#endif