src/gallium/auxiliary/tessellator/p_tessellator.h

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  25 #ifndef PIPE_TESSELLATOR_H
  26 #define PIPE_TESSELLATOR_H
  27
  28 #include "pipe/p_defines.h"
  29
  30 #ifdef __cplusplus
  31 extern "C" {
  32 #endif
  33
  34 struct pipe_tessellator;
  35 struct pipe_tessellation_factors
  36 {
  37    float outer_tf[4];
  38    float inner_tf[2];
  39    float pad[2];
  40 };
  41
  42 struct pipe_tessellator_data
  43 {
  44    uint32_t num_indices;
  45    uint32_t num_domain_points;
  46
  47    uint32_t *indices;
  48    float    *domain_points_u;
  49    float    *domain_points_v;
  50     // For Tri: domain_points_w[i] = 1.0f - domain_points_u[i] - domain_points_v[i]
  51 };
  52
  53 /// Allocate and initialize a new tessellation context
  54 struct pipe_tessellator *p_tess_init(enum pipe_prim_type tes_prim_mode,
  55                                      enum pipe_tess_spacing spacing,
  56                                      bool tes_vertex_order_cw, bool tes_point_mode);
  57 /// Destroy & de-allocate tessellation context
  58 void p_tess_destroy(struct pipe_tessellator *pipe_ts);
  59
  60
  61 /// Perform Tessellation
  62 void p_tessellate(struct pipe_tessellator *pipe_ts,
  63                   const struct pipe_tessellation_factors *tess_factors,
  64                   struct pipe_tessellator_data *tess_data);
  65
  66 #ifdef __cplusplus
  67 }
  68 #endif
  69 #endif