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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.
*
**************************************************************************/
#include "util/u_math.h"
#include "util/u_memory.h"
#include "pipe/p_defines.h"
#include "p_tessellator.h"
#include "tessellator.hpp"
#include <new>
namespace pipe_tessellator_wrap
{
/// Wrapper class for the CHWTessellator reference tessellator from MSFT
/// This class will store data not originally stored in CHWTessellator
class pipe_ts : private CHWTessellator
{
private:
typedef CHWTessellator SUPER;
enum pipe_prim_type prim_mode;
PIPE_ALIGN_VAR(32) float domain_points_u[MAX_POINT_COUNT];
PIPE_ALIGN_VAR(32) float domain_points_v[MAX_POINT_COUNT];
uint32_t num_domain_points;
PIPE_ALIGN_VAR(32) uint32_t indices[3][MAX_INDEX_COUNT / 3];
public:
void Init(enum pipe_prim_type tes_prim_mode,
enum pipe_tess_spacing ts_spacing,
bool tes_vertex_order_cw, bool tes_point_mode)
{
static D3D11_TESSELLATOR_PARTITIONING CVT_TS_D3D_PARTITIONING[] = {
D3D11_TESSELLATOR_PARTITIONING_FRACTIONAL_ODD, // PIPE_TESS_SPACING_ODD
D3D11_TESSELLATOR_PARTITIONING_FRACTIONAL_EVEN, // PIPE_TESS_SPACING_EVEN
D3D11_TESSELLATOR_PARTITIONING_INTEGER, // PIPE_TESS_SPACING_EQUAL
};
D3D11_TESSELLATOR_OUTPUT_PRIMITIVE out_prim;
if (tes_point_mode)
out_prim = D3D11_TESSELLATOR_OUTPUT_POINT;
else if (tes_prim_mode == PIPE_PRIM_LINES)
out_prim = D3D11_TESSELLATOR_OUTPUT_LINE;
else if (tes_vertex_order_cw)
out_prim = D3D11_TESSELLATOR_OUTPUT_TRIANGLE_CW;
else
out_prim = D3D11_TESSELLATOR_OUTPUT_TRIANGLE_CCW;
SUPER::Init(CVT_TS_D3D_PARTITIONING[ts_spacing],
out_prim);
prim_mode = tes_prim_mode;
num_domain_points = 0;
}
void Tessellate(const struct pipe_tessellation_factors *tess_factors,
struct pipe_tessellator_data *tess_data)
{
switch (prim_mode)
{
case PIPE_PRIM_QUADS:
SUPER::TessellateQuadDomain(
tess_factors->outer_tf[0],
tess_factors->outer_tf[1],
tess_factors->outer_tf[2],
tess_factors->outer_tf[3],
tess_factors->inner_tf[0],
tess_factors->inner_tf[1]);
break;
case PIPE_PRIM_TRIANGLES:
SUPER::TessellateTriDomain(
tess_factors->outer_tf[0],
tess_factors->outer_tf[1],
tess_factors->outer_tf[2],
tess_factors->inner_tf[0]);
break;
case PIPE_PRIM_LINES:
SUPER::TessellateIsoLineDomain(
tess_factors->outer_tf[0],
tess_factors->outer_tf[1]);
break;
default:
assert(0);
return;
}
num_domain_points = (uint32_t)SUPER::GetPointCount();
DOMAIN_POINT *points = SUPER::GetPoints();
for (uint32_t i = 0; i < num_domain_points; i++) {
domain_points_u[i] = points[i].u;
domain_points_v[i] = points[i].v;
}
tess_data->num_domain_points = num_domain_points;
tess_data->domain_points_u = &domain_points_u[0];
tess_data->domain_points_v = &domain_points_v[0];
tess_data->num_indices = (uint32_t)SUPER::GetIndexCount();
tess_data->indices = (uint32_t*)SUPER::GetIndices();
}
};
} // namespace Tessellator
/* allocate tessellator */
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)
{
void *mem;
using pipe_tessellator_wrap::pipe_ts;
mem = align_malloc(sizeof(pipe_ts), 256);
pipe_ts* tessellator = new (mem) pipe_ts();
tessellator->Init(tes_prim_mode, spacing, tes_vertex_order_cw, tes_point_mode);
return (struct pipe_tessellator *)tessellator;
}
/* destroy tessellator */
void p_tess_destroy(struct pipe_tessellator *pipe_tess)
{
using pipe_tessellator_wrap::pipe_ts;
pipe_ts *tessellator = (pipe_ts*)pipe_tess;
tessellator->~pipe_ts();
align_free(tessellator);
}
/* perform tessellation */
void p_tessellate(struct pipe_tessellator *pipe_tess,
const struct pipe_tessellation_factors *tess_factors,
struct pipe_tessellator_data *tess_data)
{
using pipe_tessellator_wrap::pipe_ts;
pipe_ts *tessellator = (pipe_ts*)pipe_tess;
tessellator->Tessellate(tess_factors, tess_data);
}
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