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