src/gallium/auxiliary/tessellator/p_tessellator.h

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#ifndef PIPE_TESSELLATOR_H
#define PIPE_TESSELLATOR_H

#include "pipe/p_defines.h"

#ifdef __cplusplus
extern "C" {
#endif

struct pipe_tessellator;
struct pipe_tessellation_factors
{
   float outer_tf[4];
   float inner_tf[2];
   float pad[2];
};

struct pipe_tessellator_data
{
   uint32_t num_indices;
   uint32_t num_domain_points;

   uint32_t *indices;
   float    *domain_points_u;
   float    *domain_points_v;
    // For Tri: domain_points_w[i] = 1.0f - domain_points_u[i] - domain_points_v[i]
};

/// Allocate and initialize a new tessellation context
struct pipe_tessellator *p_tess_init(enum pipe_prim_type tes_prim_mode,
                                     enum pipe_tess_spacing spacing,
                                     bool tes_vertex_order_cw, bool tes_point_mode);
/// Destroy & de-allocate tessellation context
void p_tess_destroy(struct pipe_tessellator *pipe_ts);


/// Perform Tessellation
void p_tessellate(struct pipe_tessellator *pipe_ts,
                  const struct pipe_tessellation_factors *tess_factors,
                  struct pipe_tessellator_data *tess_data);

#ifdef __cplusplus
}
#endif
#endif