Add Chromium-only Blender WebEngine parity work

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

@@ -0,0 +1,113 @@
+/* SPDX-FileCopyrightText: 2011-2022 Blender Foundation
+ *
+ * SPDX-License-Identifier: Apache-2.0 */
+
+#pragma once
+
+#include "kernel/svm/node_types.h"
+#include "kernel/svm/util.h"
+
+CCL_NAMESPACE_BEGIN
+
+/* Brick */
+
+ccl_device_inline float brick_noise(uint n) /* fast integer noise */
+{
+  uint nn;
+  n = (n + 1013) & 0x7fffffff;
+  n = (n >> 13) ^ n;
+  nn = (n * (n * n * 60493 + 19990303) + 1376312589) & 0x7fffffff;
+  return 0.5f * ((float)nn / 1073741824.0f);
+}
+
+ccl_device_noinline_cpu float2 svm_brick(const float3 p,
+                                         const float mortar_size,
+                                         const float mortar_smooth,
+                                         const float bias,
+                                         float brick_width,
+                                         const float row_height,
+                                         const float offset_amount,
+                                         const int offset_frequency,
+                                         const float squash_amount,
+                                         const int squash_frequency)
+{
+  int bricknum;
+  int rownum;
+  float offset = 0.0f;
+  float x;
+  float y;
+
+  rownum = floor_to_int(p.y / row_height);
+
+  if (offset_frequency && squash_frequency) {
+    brick_width *= (rownum % squash_frequency) ? 1.0f : squash_amount;           /* squash */
+    offset = (rownum % offset_frequency) ? 0.0f : (brick_width * offset_amount); /* offset */
+  }
+
+  bricknum = floor_to_int((p.x + offset) / brick_width);
+
+  x = (p.x + offset) - brick_width * bricknum;
+  y = p.y - row_height * rownum;
+
+  const float tint = saturatef((brick_noise((rownum << 16) + (bricknum & 0xFFFF)) + bias));
+  float min_dist = min(min(x, y), min(brick_width - x, row_height - y));
+
+  float mortar;
+  if (min_dist >= mortar_size) {
+    mortar = 0.0f;
+  }
+  else if (mortar_smooth == 0.0f) {
+    mortar = 1.0f;
+  }
+  else {
+    min_dist = 1.0f - min_dist / mortar_size;
+    mortar = smoothstepf(min_dist / mortar_smooth);
+  }
+
+  return make_float2(tint, mortar);
+}
+
+ccl_device_noinline void svm_node_tex_brick(ccl_private float *ccl_restrict stack,
+                                            const ccl_global SVMNodeTexBrick &ccl_restrict node)
+{
+  const float3 co = stack_load_float3(stack, node.co);
+
+  float3 color1 = stack_load(stack, node.color1);
+  const float3 color2 = stack_load(stack, node.color2);
+  const float3 mortar = stack_load(stack, node.mortar);
+
+  const float scale = stack_load(stack, node.scale);
+  const float mortar_size = stack_load(stack, node.mortar_size);
+  const float mortar_smooth = stack_load(stack, node.mortar_smooth);
+  const float bias = stack_load(stack, node.bias);
+  const float brick_width = stack_load(stack, node.brick_width);
+  const float row_height = stack_load(stack, node.row_height);
+
+  const float2 f2 = svm_brick(co * scale,
+                              mortar_size,
+                              mortar_smooth,
+                              bias,
+                              brick_width,
+                              row_height,
+                              node.offset_amount,
+                              node.offset_frequency,
+                              node.squash_amount,
+                              node.squash_frequency);
+
+  const float tint = f2.x;
+  const float f = f2.y;
+
+  if (f != 1.0f) {
+    const float facm = 1.0f - tint;
+    color1 = facm * color1 + tint * color2;
+  }
+
+  if (stack_valid(node.color_offset)) {
+    stack_store_float3(stack, node.color_offset, color1 * (1.0f - f) + mortar * f);
+  }
+  if (stack_valid(node.fac_offset)) {
+    stack_store_float(stack, node.fac_offset, f);
+  }
+}
+
+CCL_NAMESPACE_END