1 /************************************************************************** 2 * 3 * Copyright 2020 Red Hat. 4 * All Rights Reserved. 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining a 7 * copy of this software and associated documentation files (the "Software"), 8 * to deal in the Software without restriction, including without limitation 9 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 10 * and/or sell copies of the Software, and to permit persons to whom the 11 * Software is furnished to do so, subject to the following conditions: 12 * 13 * The above copyright notice and this permission notice shall be included 14 * in all copies or substantial portions of the Software. 15 * 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS 17 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 22 * SOFTWARE. 23 * 24 **************************************************************************/ 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 70