Tony Barbour | 2f18b29 | 2016-02-25 15:44:10 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2016 Google, Inc. |
| 3 | * |
| 4 | * Permission is hereby granted, free of charge, to any person obtaining a |
| 5 | * copy of this software and associated documentation files (the "Software"), |
| 6 | * to deal in the Software without restriction, including without limitation |
| 7 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| 8 | * and/or sell copies of the Software, and to permit persons to whom the |
| 9 | * Software is furnished to do so, subject to the following conditions: |
| 10 | * |
| 11 | * The above copyright notice and this permission notice shall be included |
| 12 | * in all copies or substantial portions of the Software. |
| 13 | * |
| 14 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 15 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 16 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| 17 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| 18 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
| 19 | * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER |
| 20 | * DEALINGS IN THE SOFTWARE. |
| 21 | */ |
| 22 | |
| 23 | #include <cassert> |
| 24 | #include <cmath> |
| 25 | #include <cstring> |
| 26 | #include <array> |
| 27 | #include <unordered_map> |
| 28 | |
| 29 | #include "Helpers.h" |
| 30 | #include "Meshes.h" |
| 31 | |
| 32 | namespace { |
| 33 | |
| 34 | class Mesh { |
| 35 | public: |
| 36 | struct Position { |
| 37 | float x; |
| 38 | float y; |
| 39 | float z; |
| 40 | }; |
| 41 | |
| 42 | struct Normal { |
| 43 | float x; |
| 44 | float y; |
| 45 | float z; |
| 46 | }; |
| 47 | |
| 48 | struct Face { |
| 49 | int v0; |
| 50 | int v1; |
| 51 | int v2; |
| 52 | }; |
| 53 | |
| 54 | static uint32_t vertex_stride() |
| 55 | { |
| 56 | // Position + Normal |
| 57 | const int comp_count = 6; |
| 58 | |
| 59 | return sizeof(float) * comp_count; |
| 60 | } |
| 61 | |
| 62 | static VkVertexInputBindingDescription vertex_input_binding() |
| 63 | { |
| 64 | VkVertexInputBindingDescription vi_binding = {}; |
| 65 | vi_binding.binding = 0; |
| 66 | vi_binding.stride = vertex_stride(); |
| 67 | vi_binding.inputRate = VK_VERTEX_INPUT_RATE_VERTEX; |
| 68 | |
| 69 | return vi_binding; |
| 70 | } |
| 71 | |
| 72 | static std::vector<VkVertexInputAttributeDescription> vertex_input_attributes() |
| 73 | { |
| 74 | std::vector<VkVertexInputAttributeDescription> vi_attrs(2); |
| 75 | // Position |
| 76 | vi_attrs[0].location = 0; |
| 77 | vi_attrs[0].binding = 0; |
| 78 | vi_attrs[0].format = VK_FORMAT_R32G32B32_SFLOAT; |
| 79 | vi_attrs[0].offset = 0; |
| 80 | // Normal |
| 81 | vi_attrs[1].location = 1; |
| 82 | vi_attrs[1].binding = 0; |
| 83 | vi_attrs[1].format = VK_FORMAT_R32G32B32_SFLOAT; |
| 84 | vi_attrs[1].offset = sizeof(float) * 3; |
| 85 | |
| 86 | return vi_attrs; |
| 87 | } |
| 88 | |
| 89 | static VkIndexType index_type() |
| 90 | { |
| 91 | return VK_INDEX_TYPE_UINT32; |
| 92 | } |
| 93 | |
| 94 | static VkPipelineInputAssemblyStateCreateInfo input_assembly_state() |
| 95 | { |
| 96 | VkPipelineInputAssemblyStateCreateInfo ia_info = {}; |
| 97 | ia_info.sType = VK_STRUCTURE_TYPE_PIPELINE_INPUT_ASSEMBLY_STATE_CREATE_INFO; |
| 98 | ia_info.topology = VK_PRIMITIVE_TOPOLOGY_TRIANGLE_LIST; |
| 99 | ia_info.primitiveRestartEnable = false; |
| 100 | return ia_info; |
| 101 | } |
| 102 | |
| 103 | void build(const std::vector<std::array<float, 6>> &vertices, const std::vector<std::array<int, 3>> &faces) |
| 104 | { |
| 105 | positions_.reserve(vertices.size()); |
| 106 | normals_.reserve(vertices.size()); |
| 107 | for (const auto &v : vertices) { |
| 108 | positions_.emplace_back(Position{ v[0], v[1], v[2] }); |
| 109 | normals_.emplace_back(Normal{ v[3], v[4], v[5] }); |
| 110 | } |
| 111 | |
| 112 | faces_.reserve(faces.size()); |
| 113 | for (const auto &f : faces) |
| 114 | faces_.emplace_back(Face{ f[0], f[1], f[2] }); |
| 115 | } |
| 116 | |
| 117 | uint32_t vertex_count() const |
| 118 | { |
Dustin Graves | 20f5fc0 | 2016-04-06 10:16:05 -0600 | [diff] [blame] | 119 | return static_cast<uint32_t>(positions_.size()); |
Tony Barbour | 2f18b29 | 2016-02-25 15:44:10 -0700 | [diff] [blame] | 120 | } |
| 121 | |
| 122 | VkDeviceSize vertex_buffer_size() const |
| 123 | { |
| 124 | return vertex_stride() * vertex_count(); |
| 125 | } |
| 126 | |
| 127 | void vertex_buffer_write(void *data) const |
| 128 | { |
| 129 | float *dst = reinterpret_cast<float *>(data); |
| 130 | for (size_t i = 0; i < positions_.size(); i++) { |
| 131 | const Position &pos = positions_[i]; |
| 132 | const Normal &normal = normals_[i]; |
| 133 | dst[0] = pos.x; |
| 134 | dst[1] = pos.y; |
| 135 | dst[2] = pos.z; |
| 136 | dst[3] = normal.x; |
| 137 | dst[4] = normal.y; |
| 138 | dst[5] = normal.z; |
| 139 | dst += 6; |
| 140 | } |
| 141 | } |
| 142 | |
| 143 | uint32_t index_count() const |
| 144 | { |
Dustin Graves | 20f5fc0 | 2016-04-06 10:16:05 -0600 | [diff] [blame] | 145 | return static_cast<uint32_t>(faces_.size()) * 3; |
Tony Barbour | 2f18b29 | 2016-02-25 15:44:10 -0700 | [diff] [blame] | 146 | } |
| 147 | |
| 148 | VkDeviceSize index_buffer_size() const |
| 149 | { |
| 150 | return sizeof(uint32_t) * index_count(); |
| 151 | } |
| 152 | |
| 153 | void index_buffer_write(void *data) const |
| 154 | { |
| 155 | uint32_t *dst = reinterpret_cast<uint32_t *>(data); |
| 156 | for (const auto &face : faces_) { |
| 157 | dst[0] = face.v0; |
| 158 | dst[1] = face.v1; |
| 159 | dst[2] = face.v2; |
| 160 | dst += 3; |
| 161 | } |
| 162 | } |
| 163 | |
| 164 | std::vector<Position> positions_; |
| 165 | std::vector<Normal> normals_; |
| 166 | std::vector<Face> faces_; |
| 167 | }; |
| 168 | |
| 169 | class BuildPyramid { |
| 170 | public: |
| 171 | BuildPyramid(Mesh &mesh) |
| 172 | { |
| 173 | const std::vector<std::array<float, 6>> vertices = { |
| 174 | // position normal |
| 175 | { 0.0f, 0.0f, 1.0f, 0.0f, 0.0f, 1.0f }, |
| 176 | { -1.0f, -1.0f, -1.0f, -1.0f, -1.0f, -1.0f }, |
| 177 | { 1.0f, -1.0f, -1.0f, 1.0f, -1.0f, -1.0f }, |
| 178 | { 1.0f, 1.0f, -1.0f, 1.0f, 1.0f, -1.0f }, |
| 179 | { -1.0f, 1.0f, -1.0f, -1.0f, 1.0f, -1.0f }, |
| 180 | }; |
| 181 | |
| 182 | const std::vector<std::array<int, 3>> faces = { |
| 183 | { 0, 1, 2 }, |
| 184 | { 0, 2, 3 }, |
| 185 | { 0, 3, 4 }, |
| 186 | { 0, 4, 1 }, |
| 187 | { 1, 4, 3 }, |
| 188 | { 1, 3, 2 }, |
| 189 | }; |
| 190 | |
| 191 | mesh.build(vertices, faces); |
| 192 | } |
| 193 | }; |
| 194 | |
| 195 | class BuildIcosphere { |
| 196 | public: |
| 197 | BuildIcosphere(Mesh &mesh) : mesh_(mesh), radius_(1.0f) |
| 198 | { |
| 199 | const int tessellate_level = 2; |
| 200 | |
| 201 | build_icosahedron(); |
| 202 | for (int i = 0; i < tessellate_level; i++) |
| 203 | tessellate(); |
| 204 | } |
| 205 | |
| 206 | private: |
| 207 | void build_icosahedron() |
| 208 | { |
| 209 | // https://en.wikipedia.org/wiki/Regular_icosahedron |
| 210 | const float l1 = std::sqrt(2.0f / (5.0f + std::sqrt(5.0f))) * radius_; |
| 211 | const float l2 = std::sqrt(2.0f / (5.0f - std::sqrt(5.0f))) * radius_; |
| 212 | // vertices are from three golden rectangles |
| 213 | const std::vector<std::array<float, 6>> icosahedron_vertices = { |
| 214 | // position normal |
| 215 | { -l1, -l2, 0.0f, -l1, -l2, 0.0f, }, |
| 216 | { l1, -l2, 0.0f, l1, -l2, 0.0f, }, |
| 217 | { l1, l2, 0.0f, l1, l2, 0.0f, }, |
| 218 | { -l1, l2, 0.0f, -l1, l2, 0.0f, }, |
| 219 | |
| 220 | { -l2, 0.0f, -l1, -l2, 0.0f, -l1, }, |
| 221 | { l2, 0.0f, -l1, l2, 0.0f, -l1, }, |
| 222 | { l2, 0.0f, l1, l2, 0.0f, l1, }, |
| 223 | { -l2, 0.0f, l1, -l2, 0.0f, l1, }, |
| 224 | |
| 225 | { 0.0f, -l1, -l2, 0.0f, -l1, -l2, }, |
| 226 | { 0.0f, l1, -l2, 0.0f, l1, -l2, }, |
| 227 | { 0.0f, l1, l2, 0.0f, l1, l2, }, |
| 228 | { 0.0f, -l1, l2, 0.0f, -l1, l2, }, |
| 229 | }; |
| 230 | const std::vector<std::array<int, 3>> icosahedron_faces = { |
| 231 | // triangles sharing vertex 0 |
| 232 | { 0, 1, 11 }, |
| 233 | { 0, 11, 7 }, |
| 234 | { 0, 7, 4 }, |
| 235 | { 0, 4, 8 }, |
| 236 | { 0, 8, 1 }, |
| 237 | // adjacent triangles |
| 238 | { 11, 1, 6 }, |
| 239 | { 7, 11, 10 }, |
| 240 | { 4, 7, 3 }, |
| 241 | { 8, 4, 9 }, |
| 242 | { 1, 8, 5 }, |
| 243 | // triangles sharing vertex 2 |
| 244 | { 2, 3, 10 }, |
| 245 | { 2, 10, 6 }, |
| 246 | { 2, 6, 5 }, |
| 247 | { 2, 5, 9 }, |
| 248 | { 2, 9, 3 }, |
| 249 | // adjacent triangles |
| 250 | { 10, 3, 7 }, |
| 251 | { 6, 10, 11 }, |
| 252 | { 5, 6, 1 }, |
| 253 | { 9, 5, 8 }, |
| 254 | { 3, 9, 4 }, |
| 255 | }; |
| 256 | |
| 257 | mesh_.build(icosahedron_vertices, icosahedron_faces); |
| 258 | } |
| 259 | |
| 260 | void tessellate() |
| 261 | { |
| 262 | size_t middle_point_count = mesh_.faces_.size() * 3 / 2; |
| 263 | size_t final_face_count = mesh_.faces_.size() * 4; |
| 264 | |
| 265 | std::vector<Mesh::Face> faces; |
| 266 | faces.reserve(final_face_count); |
| 267 | |
| 268 | middle_points_.clear(); |
| 269 | middle_points_.reserve(middle_point_count); |
| 270 | |
| 271 | mesh_.positions_.reserve(mesh_.vertex_count() + middle_point_count); |
| 272 | mesh_.normals_.reserve(mesh_.vertex_count() + middle_point_count); |
| 273 | |
| 274 | for (const auto &f : mesh_.faces_) { |
| 275 | int v0 = f.v0; |
| 276 | int v1 = f.v1; |
| 277 | int v2 = f.v2; |
| 278 | |
| 279 | int v01 = add_middle_point(v0, v1); |
| 280 | int v12 = add_middle_point(v1, v2); |
| 281 | int v20 = add_middle_point(v2, v0); |
| 282 | |
| 283 | faces.emplace_back(Mesh::Face{ v0, v01, v20 }); |
| 284 | faces.emplace_back(Mesh::Face{ v1, v12, v01 }); |
| 285 | faces.emplace_back(Mesh::Face{ v2, v20, v12 }); |
| 286 | faces.emplace_back(Mesh::Face{ v01, v12, v20 }); |
| 287 | } |
| 288 | |
| 289 | mesh_.faces_.swap(faces); |
| 290 | } |
| 291 | |
| 292 | int add_middle_point(int a, int b) |
| 293 | { |
| 294 | uint64_t key = (a < b) ? ((uint64_t) a << 32 | b) : ((uint64_t) b << 32 | a); |
| 295 | auto it = middle_points_.find(key); |
| 296 | if (it != middle_points_.end()) |
| 297 | return it->second; |
| 298 | |
| 299 | const Mesh::Position &pos_a = mesh_.positions_[a]; |
| 300 | const Mesh::Position &pos_b = mesh_.positions_[b]; |
| 301 | Mesh::Position pos_mid = { |
| 302 | (pos_a.x + pos_b.x) / 2.0f, |
| 303 | (pos_a.y + pos_b.y) / 2.0f, |
| 304 | (pos_a.z + pos_b.z) / 2.0f, |
| 305 | }; |
| 306 | float scale = radius_ / std::sqrt(pos_mid.x * pos_mid.x + |
| 307 | pos_mid.y * pos_mid.y + |
| 308 | pos_mid.z * pos_mid.z); |
| 309 | pos_mid.x *= scale; |
| 310 | pos_mid.y *= scale; |
| 311 | pos_mid.z *= scale; |
| 312 | |
| 313 | Mesh::Normal normal_mid = { pos_mid.x, pos_mid.y, pos_mid.z }; |
| 314 | normal_mid.x /= radius_; |
| 315 | normal_mid.y /= radius_; |
| 316 | normal_mid.z /= radius_; |
| 317 | |
| 318 | mesh_.positions_.emplace_back(pos_mid); |
| 319 | mesh_.normals_.emplace_back(normal_mid); |
| 320 | |
| 321 | int mid = mesh_.vertex_count() - 1; |
| 322 | middle_points_.emplace(std::make_pair(key, mid)); |
| 323 | |
| 324 | return mid; |
| 325 | } |
| 326 | |
| 327 | Mesh &mesh_; |
| 328 | const float radius_; |
| 329 | std::unordered_map<uint64_t, uint32_t> middle_points_; |
| 330 | }; |
| 331 | |
| 332 | class BuildTeapot { |
| 333 | public: |
| 334 | BuildTeapot(Mesh &mesh) |
| 335 | { |
| 336 | #include "Meshes.teapot.h" |
| 337 | const int position_count = sizeof(teapot_positions) / sizeof(teapot_positions[0]); |
| 338 | const int index_count = sizeof(teapot_indices) / sizeof(teapot_indices[0]); |
| 339 | assert(position_count % 3 == 0 && index_count % 3 == 0); |
| 340 | |
| 341 | Mesh::Position translate; |
| 342 | float scale; |
| 343 | get_transform(teapot_positions, position_count, translate, scale); |
| 344 | |
| 345 | for (int i = 0; i < position_count; i += 3) { |
| 346 | mesh.positions_.emplace_back(Mesh::Position{ |
| 347 | (teapot_positions[i + 0] + translate.x) * scale, |
| 348 | (teapot_positions[i + 1] + translate.y) * scale, |
| 349 | (teapot_positions[i + 2] + translate.z) * scale, |
| 350 | }); |
| 351 | |
| 352 | mesh.normals_.emplace_back(Mesh::Normal{ |
| 353 | teapot_normals[i + 0], |
| 354 | teapot_normals[i + 1], |
| 355 | teapot_normals[i + 2], |
| 356 | }); |
| 357 | } |
| 358 | |
| 359 | for (int i = 0; i < index_count; i += 3) { |
| 360 | mesh.faces_.emplace_back(Mesh::Face{ |
| 361 | teapot_indices[i + 0], |
| 362 | teapot_indices[i + 1], |
| 363 | teapot_indices[i + 2] |
| 364 | }); |
| 365 | } |
| 366 | } |
| 367 | |
| 368 | void get_transform(const float *positions, int position_count, |
| 369 | Mesh::Position &translate, float &scale) |
| 370 | { |
| 371 | float min[3] = { |
| 372 | positions[0], |
| 373 | positions[1], |
| 374 | positions[2], |
| 375 | }; |
| 376 | float max[3] = { |
| 377 | positions[0], |
| 378 | positions[1], |
| 379 | positions[2], |
| 380 | }; |
| 381 | for (int i = 3; i < position_count; i += 3) { |
| 382 | for (int j = 0; j < 3; j++) { |
| 383 | if (min[j] > positions[i + j]) |
| 384 | min[j] = positions[i + j]; |
| 385 | if (max[j] < positions[i + j]) |
| 386 | max[j] = positions[i + j]; |
| 387 | } |
| 388 | } |
| 389 | |
| 390 | translate.x = -(min[0] + max[0]) / 2.0f; |
| 391 | translate.y = -(min[1] + max[1]) / 2.0f; |
| 392 | translate.z = -(min[2] + max[2]) / 2.0f; |
| 393 | |
| 394 | float extents[3] = { |
| 395 | max[0] + translate.x, |
| 396 | max[1] + translate.y, |
| 397 | max[2] + translate.z, |
| 398 | }; |
| 399 | |
| 400 | float max_extent = extents[0]; |
| 401 | if (max_extent < extents[1]) |
| 402 | max_extent = extents[1]; |
| 403 | if (max_extent < extents[2]) |
| 404 | max_extent = extents[2]; |
| 405 | |
| 406 | scale = 1.0f / max_extent; |
| 407 | } |
| 408 | }; |
| 409 | |
| 410 | void build_meshes(std::array<Mesh, Meshes::MESH_COUNT> &meshes) |
| 411 | { |
| 412 | BuildPyramid build_pyramid(meshes[Meshes::MESH_PYRAMID]); |
| 413 | BuildIcosphere build_icosphere(meshes[Meshes::MESH_ICOSPHERE]); |
| 414 | BuildTeapot build_teapot(meshes[Meshes::MESH_TEAPOT]); |
| 415 | } |
| 416 | |
| 417 | } // namespace |
| 418 | |
| 419 | Meshes::Meshes(VkDevice dev, const std::vector<VkMemoryPropertyFlags> &mem_flags) |
| 420 | : dev_(dev), |
| 421 | vertex_input_binding_(Mesh::vertex_input_binding()), |
| 422 | vertex_input_attrs_(Mesh::vertex_input_attributes()), |
| 423 | vertex_input_state_(), |
| 424 | input_assembly_state_(Mesh::input_assembly_state()), |
| 425 | index_type_(Mesh::index_type()) |
| 426 | { |
| 427 | vertex_input_state_.sType = VK_STRUCTURE_TYPE_PIPELINE_VERTEX_INPUT_STATE_CREATE_INFO; |
| 428 | vertex_input_state_.vertexBindingDescriptionCount = 1; |
| 429 | vertex_input_state_.pVertexBindingDescriptions = &vertex_input_binding_; |
| 430 | vertex_input_state_.vertexAttributeDescriptionCount = static_cast<uint32_t>(vertex_input_attrs_.size()); |
| 431 | vertex_input_state_.pVertexAttributeDescriptions = vertex_input_attrs_.data(); |
| 432 | |
| 433 | std::array<Mesh, MESH_COUNT> meshes; |
| 434 | build_meshes(meshes); |
| 435 | |
| 436 | draw_commands_.reserve(meshes.size()); |
| 437 | uint32_t first_index = 0; |
| 438 | int32_t vertex_offset = 0; |
| 439 | VkDeviceSize vb_size = 0; |
| 440 | VkDeviceSize ib_size = 0; |
| 441 | for (const auto &mesh : meshes) { |
| 442 | VkDrawIndexedIndirectCommand draw = {}; |
| 443 | draw.indexCount = mesh.index_count(); |
| 444 | draw.instanceCount = 1; |
| 445 | draw.firstIndex = first_index; |
| 446 | draw.vertexOffset = vertex_offset; |
| 447 | draw.firstInstance = 0; |
| 448 | |
| 449 | draw_commands_.push_back(draw); |
| 450 | |
| 451 | first_index += mesh.index_count(); |
| 452 | vertex_offset += mesh.vertex_count(); |
| 453 | vb_size += mesh.vertex_buffer_size(); |
| 454 | ib_size += mesh.index_buffer_size(); |
| 455 | } |
| 456 | |
| 457 | allocate_resources(vb_size, ib_size, mem_flags); |
| 458 | |
| 459 | uint8_t *vb_data, *ib_data; |
| 460 | vk::assert_success(vk::MapMemory(dev_, mem_, 0, VK_WHOLE_SIZE, |
| 461 | 0, reinterpret_cast<void **>(&vb_data))); |
| 462 | ib_data = vb_data + ib_mem_offset_; |
| 463 | |
| 464 | for (const auto &mesh : meshes) { |
| 465 | mesh.vertex_buffer_write(vb_data); |
| 466 | mesh.index_buffer_write(ib_data); |
| 467 | vb_data += mesh.vertex_buffer_size(); |
| 468 | ib_data += mesh.index_buffer_size(); |
| 469 | } |
| 470 | |
| 471 | vk::UnmapMemory(dev_, mem_); |
| 472 | } |
| 473 | |
| 474 | Meshes::~Meshes() |
| 475 | { |
| 476 | vk::FreeMemory(dev_, mem_, nullptr); |
| 477 | vk::DestroyBuffer(dev_, vb_, nullptr); |
| 478 | vk::DestroyBuffer(dev_, ib_, nullptr); |
| 479 | } |
| 480 | |
| 481 | void Meshes::cmd_bind_buffers(VkCommandBuffer cmd) const |
| 482 | { |
| 483 | const VkDeviceSize vb_offset = 0; |
| 484 | vk::CmdBindVertexBuffers(cmd, 0, 1, &vb_, &vb_offset); |
| 485 | |
| 486 | vk::CmdBindIndexBuffer(cmd, ib_, 0, index_type_); |
| 487 | } |
| 488 | |
| 489 | void Meshes::cmd_draw(VkCommandBuffer cmd, Type type) const |
| 490 | { |
| 491 | const auto &draw = draw_commands_[type]; |
| 492 | vk::CmdDrawIndexed(cmd, draw.indexCount, draw.instanceCount, |
| 493 | draw.firstIndex, draw.vertexOffset, draw.firstInstance); |
| 494 | } |
| 495 | |
| 496 | void Meshes::allocate_resources(VkDeviceSize vb_size, VkDeviceSize ib_size, const std::vector<VkMemoryPropertyFlags> &mem_flags) |
| 497 | { |
| 498 | VkBufferCreateInfo buf_info = {}; |
| 499 | buf_info.sType = VK_STRUCTURE_TYPE_BUFFER_CREATE_INFO; |
| 500 | buf_info.size = vb_size; |
| 501 | buf_info.usage = VK_BUFFER_USAGE_VERTEX_BUFFER_BIT; |
| 502 | buf_info.sharingMode = VK_SHARING_MODE_EXCLUSIVE; |
| 503 | vk::CreateBuffer(dev_, &buf_info, nullptr, &vb_); |
| 504 | |
| 505 | buf_info.size = ib_size; |
| 506 | buf_info.usage = VK_BUFFER_USAGE_INDEX_BUFFER_BIT; |
| 507 | vk::CreateBuffer(dev_, &buf_info, nullptr, &ib_); |
| 508 | |
| 509 | VkMemoryRequirements vb_mem_reqs, ib_mem_reqs; |
| 510 | vk::GetBufferMemoryRequirements(dev_, vb_, &vb_mem_reqs); |
| 511 | vk::GetBufferMemoryRequirements(dev_, ib_, &ib_mem_reqs); |
| 512 | |
| 513 | // indices follow vertices |
| 514 | ib_mem_offset_ = vb_mem_reqs.size + |
| 515 | (ib_mem_reqs.alignment - (vb_mem_reqs.size % ib_mem_reqs.alignment)); |
| 516 | |
| 517 | VkMemoryAllocateInfo mem_info = {}; |
| 518 | mem_info.sType = VK_STRUCTURE_TYPE_MEMORY_ALLOCATE_INFO; |
| 519 | mem_info.allocationSize = ib_mem_offset_ + ib_mem_reqs.size; |
| 520 | |
| 521 | // find any supported and mappable memory type |
| 522 | uint32_t mem_types = (vb_mem_reqs.memoryTypeBits & ib_mem_reqs.memoryTypeBits); |
| 523 | for (uint32_t idx = 0; idx < mem_flags.size(); idx++) { |
| 524 | if ((mem_types & (1 << idx)) && |
| 525 | (mem_flags[idx] & VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT) && |
| 526 | (mem_flags[idx] & VK_MEMORY_PROPERTY_HOST_COHERENT_BIT)) { |
| 527 | // TODO this may not be reachable |
| 528 | mem_info.memoryTypeIndex = idx; |
| 529 | break; |
| 530 | } |
| 531 | } |
| 532 | |
| 533 | vk::AllocateMemory(dev_, &mem_info, nullptr, &mem_); |
| 534 | |
| 535 | vk::BindBufferMemory(dev_, vb_, mem_, 0); |
| 536 | vk::BindBufferMemory(dev_, ib_, mem_, ib_mem_offset_); |
| 537 | } |