diff options
Diffstat (limited to 'thirdparty/embree-aarch64/kernels/subdiv/tessellation.h')
| -rw-r--r-- | thirdparty/embree-aarch64/kernels/subdiv/tessellation.h | 161 |
1 files changed, 0 insertions, 161 deletions
diff --git a/thirdparty/embree-aarch64/kernels/subdiv/tessellation.h b/thirdparty/embree-aarch64/kernels/subdiv/tessellation.h deleted file mode 100644 index bda1e2d559..0000000000 --- a/thirdparty/embree-aarch64/kernels/subdiv/tessellation.h +++ /dev/null @@ -1,161 +0,0 @@ -// Copyright 2009-2020 Intel Corporation -// SPDX-License-Identifier: Apache-2.0 - -#pragma once - -namespace embree -{ - /* adjust discret tessellation level for feature-adaptive pre-subdivision */ - __forceinline float adjustTessellationLevel(float l, const size_t sublevel) - { - for (size_t i=0; i<sublevel; i++) l *= 0.5f; - float r = ceilf(l); - for (size_t i=0; i<sublevel; i++) r *= 2.0f; - return r; - } - - __forceinline int stitch(const int x, const int fine, const int coarse) { - return (2*x+1)*coarse/(2*fine); - } - - __forceinline void stitchGridEdges(const unsigned int low_rate, - const unsigned int high_rate, - const unsigned int x0, - const unsigned int x1, - float * __restrict__ const uv_array, - const unsigned int uv_array_step) - { -#if 1 - const float inv_low_rate = rcp((float)(low_rate-1)); - for (unsigned x=x0; x<=x1; x++) { - uv_array[(x-x0)*uv_array_step] = float(stitch(x,high_rate-1,low_rate-1))*inv_low_rate; - } - if (unlikely(x1 == high_rate-1)) - uv_array[(x1-x0)*uv_array_step] = 1.0f; -#else - assert(low_rate < high_rate); - assert(high_rate >= 2); - - const float inv_low_rate = rcp((float)(low_rate-1)); - const unsigned int dy = low_rate - 1; - const unsigned int dx = high_rate - 1; - - int p = 2*dy-dx; - - unsigned int offset = 0; - unsigned int y = 0; - float value = 0.0f; - for(unsigned int x=0;x<high_rate-1; x++) // '<=' would be correct but we will leave the 1.0f at the end - { - uv_array[offset] = value; - - offset += uv_array_step; - if (unlikely(p > 0)) - { - y++; - value = (float)y * inv_low_rate; - p -= 2*dx; - } - p += 2*dy; - } -#endif - } - - __forceinline void stitchUVGrid(const float edge_levels[4], - const unsigned int swidth, - const unsigned int sheight, - const unsigned int x0, - const unsigned int y0, - const unsigned int grid_u_res, - const unsigned int grid_v_res, - float * __restrict__ const u_array, - float * __restrict__ const v_array) - { - const unsigned int x1 = x0+grid_u_res-1; - const unsigned int y1 = y0+grid_v_res-1; - const unsigned int int_edge_points0 = (unsigned int)edge_levels[0] + 1; - const unsigned int int_edge_points1 = (unsigned int)edge_levels[1] + 1; - const unsigned int int_edge_points2 = (unsigned int)edge_levels[2] + 1; - const unsigned int int_edge_points3 = (unsigned int)edge_levels[3] + 1; - - if (unlikely(y0 == 0 && int_edge_points0 < swidth)) - stitchGridEdges(int_edge_points0,swidth,x0,x1,u_array,1); - - if (unlikely(y1 == sheight-1 && int_edge_points2 < swidth)) - stitchGridEdges(int_edge_points2,swidth,x0,x1,&u_array[(grid_v_res-1)*grid_u_res],1); - - if (unlikely(x0 == 0 && int_edge_points1 < sheight)) - stitchGridEdges(int_edge_points1,sheight,y0,y1,&v_array[grid_u_res-1],grid_u_res); - - if (unlikely(x1 == swidth-1 && int_edge_points3 < sheight)) - stitchGridEdges(int_edge_points3,sheight,y0,y1,v_array,grid_u_res); - } - - __forceinline void gridUVTessellator(const float edge_levels[4], - const unsigned int swidth, - const unsigned int sheight, - const unsigned int x0, - const unsigned int y0, - const unsigned int grid_u_res, - const unsigned int grid_v_res, - float * __restrict__ const u_array, - float * __restrict__ const v_array) - { - assert( grid_u_res >= 1); - assert( grid_v_res >= 1); - assert( edge_levels[0] >= 1.0f ); - assert( edge_levels[1] >= 1.0f ); - assert( edge_levels[2] >= 1.0f ); - assert( edge_levels[3] >= 1.0f ); - -#if defined(__AVX__) - const vint8 grid_u_segments = vint8(swidth)-1; - const vint8 grid_v_segments = vint8(sheight)-1; - - const vfloat8 inv_grid_u_segments = rcp(vfloat8(grid_u_segments)); - const vfloat8 inv_grid_v_segments = rcp(vfloat8(grid_v_segments)); - - unsigned int index = 0; - vint8 v_i( zero ); - for (unsigned int y=0;y<grid_v_res;y++,index+=grid_u_res,v_i += 1) - { - vint8 u_i ( step ); - - const vbool8 m_v = v_i < grid_v_segments; - - for (unsigned int x=0;x<grid_u_res;x+=8, u_i += 8) - { - const vbool8 m_u = u_i < grid_u_segments; - const vfloat8 u = select(m_u, vfloat8(x0+u_i) * inv_grid_u_segments, 1.0f); - const vfloat8 v = select(m_v, vfloat8(y0+v_i) * inv_grid_v_segments, 1.0f); - vfloat8::storeu(&u_array[index + x],u); - vfloat8::storeu(&v_array[index + x],v); - } - } - #else - const vint4 grid_u_segments = vint4(swidth)-1; - const vint4 grid_v_segments = vint4(sheight)-1; - - const vfloat4 inv_grid_u_segments = rcp(vfloat4(grid_u_segments)); - const vfloat4 inv_grid_v_segments = rcp(vfloat4(grid_v_segments)); - - unsigned int index = 0; - vint4 v_i( zero ); - for (unsigned int y=0;y<grid_v_res;y++,index+=grid_u_res,v_i += 1) - { - vint4 u_i ( step ); - - const vbool4 m_v = v_i < grid_v_segments; - - for (unsigned int x=0;x<grid_u_res;x+=4, u_i += 4) - { - const vbool4 m_u = u_i < grid_u_segments; - const vfloat4 u = select(m_u, vfloat4(x0+u_i) * inv_grid_u_segments, 1.0f); - const vfloat4 v = select(m_v, vfloat4(y0+v_i) * inv_grid_v_segments, 1.0f); - vfloat4::storeu(&u_array[index + x],u); - vfloat4::storeu(&v_array[index + x],v); - } - } -#endif - } -} |