65dcb5ebd3
Currently there are no functional changes. Preparing for an upcoming oneAPI integration where such separation in types is needed.
268 lines
8.8 KiB
C++
268 lines
8.8 KiB
C++
/* SPDX-License-Identifier: Apache-2.0
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* Copyright 2017-2022 Blender Foundation */
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#pragma once
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CCL_NAMESPACE_BEGIN
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#ifdef WITH_NANOVDB
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# define NDEBUG /* Disable "assert" in device code */
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# define NANOVDB_USE_INTRINSICS
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# include "nanovdb/NanoVDB.h"
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# include "nanovdb/util/SampleFromVoxels.h"
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#endif
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/* w0, w1, w2, and w3 are the four cubic B-spline basis functions. */
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ccl_device float cubic_w0(float a)
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{
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return (1.0f / 6.0f) * (a * (a * (-a + 3.0f) - 3.0f) + 1.0f);
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}
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ccl_device float cubic_w1(float a)
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{
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return (1.0f / 6.0f) * (a * a * (3.0f * a - 6.0f) + 4.0f);
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}
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ccl_device float cubic_w2(float a)
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{
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return (1.0f / 6.0f) * (a * (a * (-3.0f * a + 3.0f) + 3.0f) + 1.0f);
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}
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ccl_device float cubic_w3(float a)
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{
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return (1.0f / 6.0f) * (a * a * a);
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}
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/* g0 and g1 are the two amplitude functions. */
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ccl_device float cubic_g0(float a)
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{
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return cubic_w0(a) + cubic_w1(a);
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}
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ccl_device float cubic_g1(float a)
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{
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return cubic_w2(a) + cubic_w3(a);
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}
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/* h0 and h1 are the two offset functions */
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ccl_device float cubic_h0(float a)
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{
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return (cubic_w1(a) / cubic_g0(a)) - 1.0f;
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}
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ccl_device float cubic_h1(float a)
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{
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return (cubic_w3(a) / cubic_g1(a)) + 1.0f;
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}
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/* Fast bicubic texture lookup using 4 bilinear lookups, adapted from CUDA samples. */
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template<typename T>
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ccl_device_noinline T kernel_tex_image_interp_bicubic(ccl_global const TextureInfo &info,
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float x,
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float y)
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{
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ccl_gpu_tex_object_2D tex = (ccl_gpu_tex_object_2D)info.data;
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x = (x * info.width) - 0.5f;
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y = (y * info.height) - 0.5f;
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float px = floorf(x);
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float py = floorf(y);
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float fx = x - px;
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float fy = y - py;
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float g0x = cubic_g0(fx);
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float g1x = cubic_g1(fx);
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/* Note +0.5 offset to compensate for CUDA linear filtering convention. */
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float x0 = (px + cubic_h0(fx) + 0.5f) / info.width;
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float x1 = (px + cubic_h1(fx) + 0.5f) / info.width;
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float y0 = (py + cubic_h0(fy) + 0.5f) / info.height;
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float y1 = (py + cubic_h1(fy) + 0.5f) / info.height;
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return cubic_g0(fy) * (g0x * ccl_gpu_tex_object_read_2D<T>(tex, x0, y0) +
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g1x * ccl_gpu_tex_object_read_2D<T>(tex, x1, y0)) +
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cubic_g1(fy) * (g0x * ccl_gpu_tex_object_read_2D<T>(tex, x0, y1) +
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g1x * ccl_gpu_tex_object_read_2D<T>(tex, x1, y1));
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}
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/* Fast tricubic texture lookup using 8 trilinear lookups. */
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template<typename T>
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ccl_device_noinline T
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kernel_tex_image_interp_tricubic(ccl_global const TextureInfo &info, float x, float y, float z)
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{
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ccl_gpu_tex_object_3D tex = (ccl_gpu_tex_object_3D)info.data;
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x = (x * info.width) - 0.5f;
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y = (y * info.height) - 0.5f;
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z = (z * info.depth) - 0.5f;
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float px = floorf(x);
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float py = floorf(y);
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float pz = floorf(z);
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float fx = x - px;
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float fy = y - py;
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float fz = z - pz;
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float g0x = cubic_g0(fx);
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float g1x = cubic_g1(fx);
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float g0y = cubic_g0(fy);
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float g1y = cubic_g1(fy);
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float g0z = cubic_g0(fz);
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float g1z = cubic_g1(fz);
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/* Note +0.5 offset to compensate for CUDA linear filtering convention. */
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float x0 = (px + cubic_h0(fx) + 0.5f) / info.width;
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float x1 = (px + cubic_h1(fx) + 0.5f) / info.width;
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float y0 = (py + cubic_h0(fy) + 0.5f) / info.height;
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float y1 = (py + cubic_h1(fy) + 0.5f) / info.height;
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float z0 = (pz + cubic_h0(fz) + 0.5f) / info.depth;
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float z1 = (pz + cubic_h1(fz) + 0.5f) / info.depth;
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return g0z * (g0y * (g0x * ccl_gpu_tex_object_read_3D<T>(tex, x0, y0, z0) +
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g1x * ccl_gpu_tex_object_read_3D<T>(tex, x1, y0, z0)) +
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g1y * (g0x * ccl_gpu_tex_object_read_3D<T>(tex, x0, y1, z0) +
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g1x * ccl_gpu_tex_object_read_3D<T>(tex, x1, y1, z0))) +
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g1z * (g0y * (g0x * ccl_gpu_tex_object_read_3D<T>(tex, x0, y0, z1) +
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g1x * ccl_gpu_tex_object_read_3D<T>(tex, x1, y0, z1)) +
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g1y * (g0x * ccl_gpu_tex_object_read_3D<T>(tex, x0, y1, z1) +
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g1x * ccl_gpu_tex_object_read_3D<T>(tex, x1, y1, z1)));
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}
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#ifdef WITH_NANOVDB
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template<typename T, typename S>
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ccl_device T kernel_tex_image_interp_tricubic_nanovdb(S &s, float x, float y, float z)
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{
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float px = floorf(x);
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float py = floorf(y);
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float pz = floorf(z);
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float fx = x - px;
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float fy = y - py;
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float fz = z - pz;
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float g0x = cubic_g0(fx);
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float g1x = cubic_g1(fx);
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float g0y = cubic_g0(fy);
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float g1y = cubic_g1(fy);
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float g0z = cubic_g0(fz);
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float g1z = cubic_g1(fz);
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float x0 = px + cubic_h0(fx);
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float x1 = px + cubic_h1(fx);
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float y0 = py + cubic_h0(fy);
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float y1 = py + cubic_h1(fy);
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float z0 = pz + cubic_h0(fz);
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float z1 = pz + cubic_h1(fz);
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using namespace nanovdb;
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return g0z * (g0y * (g0x * s(Vec3f(x0, y0, z0)) + g1x * s(Vec3f(x1, y0, z0))) +
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g1y * (g0x * s(Vec3f(x0, y1, z0)) + g1x * s(Vec3f(x1, y1, z0)))) +
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g1z * (g0y * (g0x * s(Vec3f(x0, y0, z1)) + g1x * s(Vec3f(x1, y0, z1))) +
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g1y * (g0x * s(Vec3f(x0, y1, z1)) + g1x * s(Vec3f(x1, y1, z1))));
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}
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template<typename T>
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ccl_device_noinline T kernel_tex_image_interp_nanovdb(
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ccl_global const TextureInfo &info, float x, float y, float z, uint interpolation)
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{
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using namespace nanovdb;
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NanoGrid<T> *const grid = (NanoGrid<T> *)info.data;
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typedef typename nanovdb::NanoGrid<T>::AccessorType AccessorType;
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AccessorType acc = grid->getAccessor();
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switch (interpolation) {
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case INTERPOLATION_CLOSEST:
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return SampleFromVoxels<AccessorType, 0, false>(acc)(Vec3f(x, y, z));
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case INTERPOLATION_LINEAR:
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return SampleFromVoxels<AccessorType, 1, false>(acc)(Vec3f(x - 0.5f, y - 0.5f, z - 0.5f));
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default:
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SampleFromVoxels<AccessorType, 1, false> s(acc);
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return kernel_tex_image_interp_tricubic_nanovdb<T>(s, x - 0.5f, y - 0.5f, z - 0.5f);
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}
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}
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#endif
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ccl_device float4 kernel_tex_image_interp(KernelGlobals kg, int id, float x, float y)
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{
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ccl_global const TextureInfo &info = kernel_tex_fetch(__texture_info, id);
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/* float4, byte4, ushort4 and half4 */
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const int texture_type = info.data_type;
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if (texture_type == IMAGE_DATA_TYPE_FLOAT4 || texture_type == IMAGE_DATA_TYPE_BYTE4 ||
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texture_type == IMAGE_DATA_TYPE_HALF4 || texture_type == IMAGE_DATA_TYPE_USHORT4) {
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if (info.interpolation == INTERPOLATION_CUBIC || info.interpolation == INTERPOLATION_SMART) {
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return kernel_tex_image_interp_bicubic<float4>(info, x, y);
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}
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else {
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ccl_gpu_tex_object_2D tex = (ccl_gpu_tex_object_2D)info.data;
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return ccl_gpu_tex_object_read_2D<float4>(tex, x, y);
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}
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}
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/* float, byte and half */
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else {
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float f;
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if (info.interpolation == INTERPOLATION_CUBIC || info.interpolation == INTERPOLATION_SMART) {
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f = kernel_tex_image_interp_bicubic<float>(info, x, y);
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}
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else {
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ccl_gpu_tex_object_2D tex = (ccl_gpu_tex_object_2D)info.data;
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f = ccl_gpu_tex_object_read_2D<float>(tex, x, y);
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}
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return make_float4(f, f, f, 1.0f);
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}
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}
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ccl_device float4 kernel_tex_image_interp_3d(KernelGlobals kg,
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int id,
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float3 P,
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InterpolationType interp)
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{
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ccl_global const TextureInfo &info = kernel_tex_fetch(__texture_info, id);
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if (info.use_transform_3d) {
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P = transform_point(&info.transform_3d, P);
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}
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const float x = P.x;
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const float y = P.y;
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const float z = P.z;
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uint interpolation = (interp == INTERPOLATION_NONE) ? info.interpolation : interp;
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const int texture_type = info.data_type;
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#ifdef WITH_NANOVDB
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if (texture_type == IMAGE_DATA_TYPE_NANOVDB_FLOAT) {
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float f = kernel_tex_image_interp_nanovdb<float>(info, x, y, z, interpolation);
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return make_float4(f, f, f, 1.0f);
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}
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if (texture_type == IMAGE_DATA_TYPE_NANOVDB_FLOAT3) {
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nanovdb::Vec3f f = kernel_tex_image_interp_nanovdb<nanovdb::Vec3f>(
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info, x, y, z, interpolation);
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return make_float4(f[0], f[1], f[2], 1.0f);
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}
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#endif
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if (texture_type == IMAGE_DATA_TYPE_FLOAT4 || texture_type == IMAGE_DATA_TYPE_BYTE4 ||
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texture_type == IMAGE_DATA_TYPE_HALF4 || texture_type == IMAGE_DATA_TYPE_USHORT4) {
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if (interpolation == INTERPOLATION_CUBIC || interpolation == INTERPOLATION_SMART) {
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return kernel_tex_image_interp_tricubic<float4>(info, x, y, z);
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}
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else {
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ccl_gpu_tex_object_3D tex = (ccl_gpu_tex_object_3D)info.data;
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return ccl_gpu_tex_object_read_3D<float4>(tex, x, y, z);
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}
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}
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else {
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float f;
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if (interpolation == INTERPOLATION_CUBIC || interpolation == INTERPOLATION_SMART) {
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f = kernel_tex_image_interp_tricubic<float>(info, x, y, z);
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}
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else {
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ccl_gpu_tex_object_3D tex = (ccl_gpu_tex_object_3D)info.data;
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f = ccl_gpu_tex_object_read_3D<float>(tex, x, y, z);
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}
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return make_float4(f, f, f, 1.0f);
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}
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}
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CCL_NAMESPACE_END
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