Add Chromium-only Blender WebEngine parity work

blender-5.2.0/intern/cycles/kernel/svm/wave.h

@@ -0,0 +1,109 @@
+/* SPDX-FileCopyrightText: 2011-2022 Blender Foundation
+ *
+ * SPDX-License-Identifier: Apache-2.0 */
+
+#pragma once
+
+#include "kernel/svm/fractal_noise.h"
+#include "kernel/svm/node_types.h"
+#include "kernel/svm/util.h"
+
+CCL_NAMESPACE_BEGIN
+
+/* Wave */
+
+ccl_device_noinline_cpu float svm_wave(NodeWaveType type,
+                                       NodeWaveBandsDirection bands_dir,
+                                       NodeWaveRingsDirection rings_dir,
+                                       NodeWaveProfile profile,
+                                       float3 p,
+                                       const float distortion,
+                                       const float detail,
+                                       const float dscale,
+                                       const float droughness,
+                                       const float phase)
+{
+  /* Prevent precision issues on unit coordinates. */
+  p = (p + 0.000001f) * 0.999999f;
+
+  float n;
+
+  if (type == NODE_WAVE_BANDS) {
+    if (bands_dir == NODE_WAVE_BANDS_DIRECTION_X) {
+      n = p.x * 20.0f;
+    }
+    else if (bands_dir == NODE_WAVE_BANDS_DIRECTION_Y) {
+      n = p.y * 20.0f;
+    }
+    else if (bands_dir == NODE_WAVE_BANDS_DIRECTION_Z) {
+      n = p.z * 20.0f;
+    }
+    else { /* NODE_WAVE_BANDS_DIRECTION_DIAGONAL */
+      n = (p.x + p.y + p.z) * 10.0f;
+    }
+  }
+  else { /* NODE_WAVE_RINGS */
+    float3 rp = p;
+    if (rings_dir == NODE_WAVE_RINGS_DIRECTION_X) {
+      rp *= make_float3(0.0f, 1.0f, 1.0f);
+    }
+    else if (rings_dir == NODE_WAVE_RINGS_DIRECTION_Y) {
+      rp *= make_float3(1.0f, 0.0f, 1.0f);
+    }
+    else if (rings_dir == NODE_WAVE_RINGS_DIRECTION_Z) {
+      rp *= make_float3(1.0f, 1.0f, 0.0f);
+    }
+    /* else: NODE_WAVE_RINGS_DIRECTION_SPHERICAL */
+
+    n = len(rp) * 20.0f;
+  }
+
+  n += phase;
+
+  if (distortion != 0.0f) {
+    n += distortion * (noise_fbm(p * dscale, detail, droughness, 2.0f, true) * 2.0f - 1.0f);
+  }
+
+  if (profile == NODE_WAVE_PROFILE_SIN) {
+    return 0.5f + 0.5f * sinf(n - M_PI_2_F);
+  }
+  if (profile == NODE_WAVE_PROFILE_SAW) {
+    n /= M_2PI_F;
+    return n - floorf(n);
+  }
+  /* NODE_WAVE_PROFILE_TRI */
+  n /= M_2PI_F;
+  return fabsf(n - floorf(n + 0.5f)) * 2.0f;
+}
+
+ccl_device_noinline void svm_node_tex_wave(ccl_private float *ccl_restrict stack,
+                                           const ccl_global SVMNodeTexWave &ccl_restrict node)
+{
+  const float3 co = stack_load_float3(stack, node.co);
+  const float scale = stack_load(stack, node.scale);
+  const float distortion = stack_load(stack, node.distortion);
+  const float detail = stack_load(stack, node.detail);
+  const float dscale = stack_load(stack, node.dscale);
+  const float droughness = stack_load(stack, node.droughness);
+  const float phase = stack_load(stack, node.phase);
+
+  const float f = svm_wave(node.wave_type,
+                           node.bands_direction,
+                           node.rings_direction,
+                           node.profile,
+                           co * scale,
+                           distortion,
+                           detail,
+                           dscale,
+                           droughness,
+                           phase);
+
+  if (stack_valid(node.fac_offset)) {
+    stack_store_float(stack, node.fac_offset, f);
+  }
+  if (stack_valid(node.color_offset)) {
+    stack_store_float3(stack, node.color_offset, make_float3(f, f, f));
+  }
+}
+
+CCL_NAMESPACE_END