eleni.mutantstargoat.com Git - demo/blob - src/vulkan/vk.cc

   1 #define GLFW_INCLUDE_VULKAN
   2 #include <GLFW/glfw3.h>
   3
   4 #include <alloca.h>
   5 #include <assert.h>
   6 #include <stdio.h>
   7 #include <string.h>
   8 #include <string>
   9 #include <vector>
  10
  11 #include <gmath/gmath.h>
  12
  13 #include "allocator.h"
  14 #include "gfxapi.h"
  15 #include "image.h"
  16 #include "vkutil.h"
  17 #include "vk.h"
  18
  19 /* global variables */
  20 extern GLFWwindow *win;
  21 extern int win_w;
  22 extern int win_h;
  23
  24 static VkCommandBuffer cmd_buf; // command buffer used at zbuffer creation
  25 //depth buffer
  26 static VkImage dimg;
  27 static VkImageView dview;
  28 //swapchain
  29 static VkImage *images;
  30 static VkImageView *iviews;
  31 static uint32_t num_images;
  32
  33 /* static variables */
  34 static VkDeviceMemory gpu_mem; // to be replaced when I fix the allocator
  35 // zbuffer image, view:
  36
  37 VkCommandBuffer *swapchain_cmd_bufs;
  38
  39 /* static functions */
  40 static void error_callback(int error, const char *descr);
  41 static void clear(float r, float g, float b);
  42 static void viewport(int x, int y, int width, int height);
  43 static void zbuffer(bool enable);
  44 static void cull_face(Gfx_cull_face cf);
  45 static void reshape(int width, int height);
  46 static void swapbuffers();
  47 static void begin_drawing();
  48 static void end_drawing();
  49
  50 static bool create_swapchain();
  51 static bool begin_command_buffer();
  52 static bool create_swapchain_image_views(VkFormat format);
  53 static bool create_zbuffer();
  54
  55 static bool create_swapchain_cmd_bufs(VkCommandPool vk_pool);
  56 static bool record_cmd_clear(float r, float g, float b);
  57
  58 bool init_vulkan()
  59 {
  60         if(!glfwInit()) {
  61                 fprintf(stderr, "Failed to initialize GLFW.\n");
  62                 return false;
  63         }
  64
  65         if(!glfwVulkanSupported()) {
  66                 fprintf(stderr, "No Vulkan support on the device.\n");
  67                 return false;
  68         }
  69
  70         //TODO: remove later
  71         glfwSetErrorCallback(error_callback);
  72
  73         /* create device and command pool! */
  74         if(!vku_create_device()) {
  75                 fprintf(stderr, "Failed to initialize vulkan.\n");
  76                 return false;
  77         }
  78
  79         if(!glfwGetPhysicalDevicePresentationSupport(vkinst, vk_physical, vkqfamily)) {
  80                 fprintf(stderr, "Presentation support not found.\n");
  81                 return false;
  82         }
  83
  84         glfwWindowHint(GLFW_CLIENT_API, GLFW_NO_API);
  85         if(!(win = glfwCreateWindow(win_w, win_h, "vkcow", 0, 0))) {
  86                 fprintf(stderr, "Failed to create window.\n");
  87                 return false;
  88         }
  89
  90         VkResult res = glfwCreateWindowSurface(vkinst, win, 0, &vk_surface);
  91         if(res != VK_SUCCESS) {
  92                 fprintf(stderr, "Failed to create KHR surface: %s\n", vku_get_vulkan_error_str(res));
  93                 return false;
  94         }
  95
  96         if(!create_swapchain()) {
  97                 fprintf(stderr, "Failed to create swapchain.\n");
  98                 return false;
  99         }
 100
 101         cmd_buf = VK_NULL_HANDLE;
 102         if(!begin_command_buffer()) {
 103                 fprintf(stderr, "Failed to start VK_NULL_HANDLE command buffer.\n");
 104                 return false;
 105         }
 106
 107         if(!create_zbuffer()) {
 108                 fprintf(stderr, "Failed to create depth buffer.\n");
 109                 return false;
 110         }
 111
 112         gfx_clear = clear;
 113         gfx_viewport = viewport;
 114         gfx_zbuffer = zbuffer;
 115         gfx_cull_face = cull_face;
 116         gfx_reshape = reshape;
 117         gfx_swapbuffers = swapbuffers;
 118         gfx_begin_drawing = begin_drawing;
 119         gfx_end_drawing = end_drawing;
 120
 121
 122 /*
 123         if(!vku_create_semaphores())
 124                 return false;
 125
 126         if(!(vk_swapchain = vku_create_swapchain(vk_surface, win_w, win_h, 2,
 127                                                 VK_PRESENT_MODE_IMMEDIATE_KHR, 0))) {
 128                 fprintf(stderr, "Failed to create swapchain.\n");
 129                 return false;
 130         }
 131
 132         vkswapchain_images = vku_get_swapchain_images(vk_swapchain, &vknum_swapchain_images);
 133         if(!vkswapchain_images) {
 134                 fprintf(stderr, "Failed to get swapchain images.\n");
 135                 return false;
 136         }
 137
 138 //              vkswapchain_views = vku_create_image_views(vkswapchain_images, vknum_swapchain_images);
 139 //              if(!vkswapchain_views) {
 140 //                      fprintf(stderr, "Failed to create swapchain image views.\n");
 141 //                      delete [] vkswapchain_images;
 142 //                      return false;
 143 //              }
 144
 145         if(!create_swapchain_cmd_bufs(vk_pool)) {
 146                 return false;
 147         }
 148
 149         if(!record_cmd_clear(1.0, 0.1, 0.1))
 150                 return false;
 151         */
 152
 153         return true;
 154 }
 155
 156 static bool create_swapchain()
 157 {
 158         /* surface capabilities */
 159         VkSurfaceCapabilitiesKHR scap;
 160         if(vkGetPhysicalDeviceSurfaceCapabilitiesKHR(vk_physical, vk_surface, &scap) != VK_SUCCESS) {
 161                 fprintf(stderr, "Failed to get physical device surface capabilities\n");
 162                 return false;
 163         }
 164
 165         /* presentation modes */
 166         uint32_t prmode_cnt;
 167         if(vkGetPhysicalDeviceSurfacePresentModesKHR(vk_physical, vk_surface, &prmode_cnt, 0) != VK_SUCCESS) {
 168                 fprintf(stderr, "Failed to get physical device surface presentation modes count.\n");
 169                 return false;
 170         }
 171
 172         if(prmode_cnt == 0) {
 173                 fprintf(stderr, "Presentation modes not found.\n");
 174                 return false;
 175         }
 176
 177         VkPresentModeKHR scmode = VK_PRESENT_MODE_FIFO_KHR;
 178         VkPresentModeKHR *modes = new VkPresentModeKHR[prmode_cnt];
 179
 180         if(vkGetPhysicalDeviceSurfacePresentModesKHR(vk_physical, vk_surface, &prmode_cnt, modes) != VK_SUCCESS) {
 181                 fprintf(stderr, "Failed to get physical device presentation modes.\n");
 182                 return false;
 183         }
 184
 185         for(uint32_t i=0; i<prmode_cnt; i++) {
 186                 if(modes[i] == VK_PRESENT_MODE_MAILBOX_KHR) {
 187                         scmode = VK_PRESENT_MODE_MAILBOX_KHR;
 188                         break;
 189                 }
 190                 if((scmode != VK_PRESENT_MODE_MAILBOX_KHR) && (modes[i] == VK_PRESENT_MODE_IMMEDIATE_KHR)) {
 191                                 //fallback
 192                                 scmode = VK_PRESENT_MODE_IMMEDIATE_KHR;
 193                 }
 194         }
 195
 196         /* swapchain extents */
 197         VkExtent2D scextent;
 198         if(scap.currentExtent.width == 0xffffffff || scap.currentExtent.height == 0xffffffff) {
 199                 scextent.width = win_w;
 200                 scextent.height = win_h;
 201         }
 202         else {
 203                 scextent = scap.currentExtent;
 204                 win_w = scextent.width;
 205                 win_h = scextent.height;
 206         }
 207
 208         /* number of swapchain images (on intel that's 3: maybe should hardcode it to 2?) */
 209         num_images = scap.minImageCount; //+ 1;
 210         /* intel doesn't set the maxImageCount */
 211         if(scap.maxImageCount > 0 && num_images > scap.maxImageCount)
 212                 num_images = scap.maxImageCount;
 213
 214         printf("num_images : %u\n", num_images);
 215         assert(num_images > 0);
 216
 217         /* transform flags */
 218         VkSurfaceTransformFlagBitsKHR pre_transf = scap.currentTransform;
 219         if(scap.supportedTransforms & VK_SURFACE_TRANSFORM_IDENTITY_BIT_KHR)
 220                 pre_transf = VK_SURFACE_TRANSFORM_IDENTITY_BIT_KHR;
 221
 222         /* find suitable colorspace, format */
 223         uint32_t fcount;
 224         if(vkGetPhysicalDeviceSurfaceFormatsKHR(vk_physical, vk_surface, &fcount, 0) != VK_SUCCESS) {
 225                 fprintf(stderr, "Failed to get format count for physical device.\n");
 226                 return false;
 227         }
 228         if(fcount == 0) {
 229                 fprintf(stderr, "No color formats were found.\n");
 230                 return false;
 231         }
 232
 233         VkFormat format;
 234         VkColorSpaceKHR colorspace;
 235
 236         VkSurfaceFormatKHR *formats = new VkSurfaceFormatKHR[fcount];
 237         if(vkGetPhysicalDeviceSurfaceFormatsKHR(vk_physical, vk_surface, &fcount, formats) != VK_SUCCESS) {
 238                 fprintf(stderr, "Failed to get surface formats.\n");
 239                 return false;
 240         }
 241         if((fcount == 1) && (formats[0].format == VK_FORMAT_UNDEFINED)) {
 242                 format = VK_FORMAT_B8G8R8_UNORM;
 243         } else {
 244                 format = formats[0].format;
 245         }
 246         colorspace = formats[0].colorSpace;
 247
 248         /* creating the swapchain */
 249         VkSwapchainCreateInfoKHR sinfo;
 250         memset(&sinfo, 0, sizeof sinfo);
 251
 252         sinfo.sType = VK_STRUCTURE_TYPE_SWAPCHAIN_CREATE_INFO_KHR;
 253         sinfo.surface = vk_surface;
 254         sinfo.minImageCount = num_images;
 255         sinfo.imageFormat = format;
 256         sinfo.imageColorSpace = colorspace;
 257         sinfo.imageExtent = scextent;
 258         sinfo.imageUsage = VK_IMAGE_USAGE_COLOR_ATTACHMENT_BIT;
 259         sinfo.preTransform = pre_transf;
 260         sinfo.compositeAlpha = VK_COMPOSITE_ALPHA_OPAQUE_BIT_KHR;
 261         sinfo.imageArrayLayers = 1;
 262         sinfo.imageSharingMode = VK_SHARING_MODE_EXCLUSIVE;
 263         sinfo.presentMode = scmode;
 264         sinfo.oldSwapchain = VK_NULL_HANDLE; //TODO
 265         sinfo.clipped = VK_TRUE; //TODO
 266
 267         if(vkCreateSwapchainKHR(vk_device, &sinfo, 0, &vk_swapchain) != VK_SUCCESS) {
 268                 fprintf(stderr, "Failed to create swapchain.\n");
 269                 return false;
 270         }
 271
 272         if(vkGetSwapchainImagesKHR(vk_device, vk_swapchain, &num_images, 0) != VK_SUCCESS) {
 273                 fprintf(stderr, "Failed to get the number of the swapchain images.\n");
 274                 return false;
 275         }
 276
 277         images = new VkImage[num_images];
 278         if(vkGetSwapchainImagesKHR(vk_device, vk_swapchain, &num_images, images) != VK_SUCCESS) {
 279                 fprintf(stderr, "Failed to get the swapchain images.\n");
 280                 return false;
 281         }
 282         assert(images);
 283
 284         if(!create_swapchain_image_views(format)) {
 285                 fprintf(stderr, "Failed to create image views for the swapchain images.\n");
 286                 return false;
 287         }
 288
 289         // create renderpass
 290
 291
 292         return true;
 293 }
 294
 295 static bool create_swapchain_image_views(VkFormat format)
 296 {
 297         VkImageViewCreateInfo ivinf;
 298         memset(&ivinf, 0, sizeof ivinf);
 299
 300         ivinf.sType = VK_STRUCTURE_TYPE_IMAGE_VIEW_CREATE_INFO;
 301         ivinf.format = format;
 302         ivinf.components = {
 303                 VK_COMPONENT_SWIZZLE_R,
 304                 VK_COMPONENT_SWIZZLE_G,
 305                 VK_COMPONENT_SWIZZLE_B,
 306                 VK_COMPONENT_SWIZZLE_A
 307         };
 308         ivinf.subresourceRange.aspectMask = VK_IMAGE_ASPECT_COLOR_BIT;
 309         ivinf.subresourceRange.levelCount = 1;
 310         ivinf.subresourceRange.layerCount = 1;
 311         ivinf.viewType = VK_IMAGE_VIEW_TYPE_2D;
 312
 313         iviews = new VkImageView[num_images];
 314         for(uint32_t i=0; i<num_images; i++) {
 315                 ivinf.image = images[i];
 316                 if(vkCreateImageView(vk_device, &ivinf, 0, &iviews[i]) != VK_SUCCESS) {
 317                         fprintf(stderr, "Failed to create view for the swapchain image: %d.\n", i);
 318                         return false;
 319                 }
 320         }
 321         return true;
 322 }
 323
 324 static bool begin_command_buffer()
 325 {
 326         if(cmd_buf == VK_NULL_HANDLE) {
 327                 cmd_buf = vku_alloc_cmdbuf(vk_pool, VK_COMMAND_BUFFER_LEVEL_PRIMARY);
 328
 329                 VkCommandBufferInheritanceInfo ciinf;
 330                 memset(&ciinf, 0, sizeof ciinf);
 331                 ciinf.sType = VK_STRUCTURE_TYPE_COMMAND_BUFFER_INHERITANCE_INFO;
 332                 ciinf.renderPass = VK_NULL_HANDLE;
 333                 ciinf.framebuffer = VK_NULL_HANDLE;
 334                 ciinf.occlusionQueryEnable = VK_FALSE;
 335
 336                 VkCommandBufferBeginInfo cbinf;
 337                 memset(&cbinf, 0, sizeof cbinf);
 338                 cbinf.sType = VK_STRUCTURE_TYPE_COMMAND_BUFFER_BEGIN_INFO;
 339                 cbinf.pInheritanceInfo = &ciinf;
 340
 341                 if(vkBeginCommandBuffer(cmd_buf, &cbinf) != VK_SUCCESS) {
 342                         fprintf(stderr, "Failed to begin command buffer.\n");
 343                         return false;
 344                 }
 345         }
 346         return true;
 347 }
 348
 349 static bool create_zbuffer()
 350 {
 351         VkFormat dformat = VK_FORMAT_D32_SFLOAT_S8_UINT;
 352
 353         VkImageCreateInfo dinfo;
 354         memset(&dinfo, 0, sizeof dinfo);
 355
 356         dinfo.sType = VK_STRUCTURE_TYPE_IMAGE_CREATE_INFO;
 357         dinfo.imageType = VK_IMAGE_TYPE_2D;
 358         dinfo.format = dformat;
 359         dinfo.extent = {win_w, win_h, 1};
 360         dinfo.mipLevels = 1;
 361         dinfo.arrayLayers = 1;
 362         dinfo.samples = VK_SAMPLE_COUNT_1_BIT;
 363         dinfo.tiling = VK_IMAGE_TILING_OPTIMAL;
 364         dinfo.usage = VK_IMAGE_USAGE_DEPTH_STENCIL_ATTACHMENT_BIT;
 365
 366         if(vkCreateImage(vk_device, &dinfo, 0, &dimg) != VK_SUCCESS) {
 367                 fprintf(stderr, "Failed to create depth buffer image.\n");
 368                 return false;
 369         }
 370
 371         VkMemoryRequirements dmem_reqs;
 372         vkGetImageMemoryRequirements(vk_device, dimg, &dmem_reqs);
 373
 374         gpu_mem = vk_allocate(dmem_reqs.size);
 375
 376         if(!gpu_mem)
 377                 return false;
 378
 379         vkBindImageMemory(vk_device, dimg, gpu_mem, 0);
 380
 381         // XXX set image layout
 382         if(!vk_image_set_layout(cmd_buf, dimg, VK_IMAGE_ASPECT_DEPTH_BIT,
 383                         VK_IMAGE_LAYOUT_UNDEFINED, VK_IMAGE_LAYOUT_DEPTH_STENCIL_ATTACHMENT_OPTIMAL,
 384                         (VkAccessFlagBits)0)) {
 385                 fprintf(stderr, "Failed to set depth buffer layout.\n");
 386                 return false;
 387         }
 388
 389         VkImageViewCreateInfo div_inf;
 390         memset(&div_inf, 0, sizeof div_inf);
 391
 392         div_inf.sType = VK_STRUCTURE_TYPE_IMAGE_VIEW_CREATE_INFO;
 393         div_inf.image = dimg;
 394         div_inf.format = dformat;
 395         div_inf.subresourceRange.aspectMask = VK_IMAGE_ASPECT_DEPTH_BIT;
 396         div_inf.subresourceRange.levelCount = 1;
 397         div_inf.subresourceRange.layerCount = 1;
 398         div_inf.viewType = VK_IMAGE_VIEW_TYPE_2D;
 399
 400         if(vkCreateImageView(vk_device, &div_inf, 0, &dview) != VK_SUCCESS) {
 401                 fprintf(stderr, "Failed to create image view for depth buffer.\n");
 402         }
 403
 404         return true;
 405 }
 406
 407 void cleanup_vulkan()
 408 {
 409         vkFreeCommandBuffers(vk_device, vk_pool, vknum_swapchain_images, swapchain_cmd_bufs);
 410         if(win) {
 411                 glfwDestroyWindow(win);
 412         }
 413         glfwTerminate();
 414
 415         //TODOs according to the book:
 416         // 1- make sure all threads have been terminated (when I add threads)
 417         vku_cleanup();
 418 }
 419
 420 static void error_callback(int error, const char *description)
 421 {
 422         fprintf(stderr, "GLFW error %d: %s.\n", error, description);
 423 }
 424
 425 static void reshape(int width, int height)
 426 {
 427         VkSwapchainKHR sc;
 428         if(!(sc = vku_create_swapchain(vk_surface, width, height, 2, VK_PRESENT_MODE_FIFO_KHR,
 429                                        vk_swapchain))) {
 430                 fprintf(stderr, "Failed to create %dx%d double-buffered swapchain\n", width, height);
 431                 return;
 432         }
 433         vk_swapchain = sc;
 434
 435         delete [] vkswapchain_images;
 436         vkswapchain_images = vku_get_swapchain_images(sc, 0);
 437         vk_curr_swapchain_image = vku_get_next_image(vk_swapchain);
 438 }
 439
 440 static void clear(float r, float g, float b)
 441 {
 442 }
 443
 444 static void viewport(int x, int y, int width, int height)
 445 {
 446 }
 447
 448 static void zbuffer(bool enable)
 449 {
 450 }
 451
 452 static void cull_face(Gfx_cull_face cf)
 453 {
 454 }
 455
 456 static void swapbuffers()
 457 {
 458 }
 459
 460 static void begin_drawing()
 461 {
 462         // if((vk_curr_swapchain_image = vku_get_next_image(vk_swapchain)) == -1) {
 463         //      fprintf(stderr, "Failed to get swapchain image. Exiting.\n");
 464         //      exit(1);
 465         // }
 466 }
 467
 468 static void end_drawing()
 469 {
 470         /* submit queue */
 471
 472         // VkSubmitInfo sinf;
 473         // memset(&sinf, 0, sizeof sinf);
 474         // sinf.sType = VK_STRUCTURE_TYPE_SUBMIT_INFO;
 475         // sinf.waitSemaphoreCount = 1;
 476         // sinf.pWaitSemaphores = &vk_img_avail_sema;
 477         // sinf.signalSemaphoreCount = 1;
 478         // sinf.pSignalSemaphores = &vk_rend_done_sema;
 479
 480         // // the queue should wait on the semaphore
 481
 482         // VkPipelineStageFlags wait_flags = VK_PIPELINE_STAGE_TRANSFER_BIT;
 483         // sinf.pWaitDstStageMask = &wait_flags;
 484         // sinf.commandBufferCount = 1;
 485         // sinf.pCommandBuffers = &swapchain_cmd_bufs[vk_curr_swapchain_image];
 486
 487         // if(vkQueueSubmit(vk_queue, 1, &sinf, VK_NULL_HANDLE) != VK_SUCCESS) {
 488         //      fprintf(stderr, "Failed to submit drawing command buffer\n");
 489         //      exit(1);
 490         // }
 491
 492         // /* present drawn image */
 493         // VkPresentInfoKHR pinf;
 494         // memset(&pinf, 0, sizeof pinf);
 495         // pinf.sType = VK_STRUCTURE_TYPE_PRESENT_INFO_KHR;
 496         // pinf.waitSemaphoreCount = 1;
 497         // pinf.pWaitSemaphores = &vk_rend_done_sema;
 498         // pinf.swapchainCount = 1;
 499         // pinf.pSwapchains = &vk_swapchain;
 500         // pinf.pImageIndices = (uint32_t *)&vk_curr_swapchain_image;
 501
 502         // if(vkQueuePresentKHR(vk_queue, &pinf) != VK_SUCCESS) {
 503         //      fprintf(stderr, "Failed to submit presentation command buffer.\n");
 504         //      exit(1);
 505         // }
 506 }
 507
 508 static bool record_cmd_clear(float r, float g, float b)
 509 {
 510 //      VkCommandBufferBeginInfo binf;
 511 //      binf.sType = VK_STRUCTURE_TYPE_COMMAND_BUFFER_BEGIN_INFO;
 512 //      binf.flags = VK_COMMAND_BUFFER_USAGE_SIMULTANEOUS_USE_BIT;
 513
 514 //      /* this function must be called outside a renderpass instance */
 515 //      const VkClearColorValue pcolor[4] = {r, g, b, 1.0};
 516
 517 //      VkImageSubresourceRange range;
 518 //      memset(&range, 0, sizeof range);
 519 //      range.aspectMask = VK_IMAGE_ASPECT_COLOR_BIT;
 520 //      range.baseMipLevel = 0;
 521 //      range.baseArrayLayer = 0;
 522 //      range.layerCount = 1;
 523
 524 //      for(int i=0; i<vknum_swapchain_images; i++) {
 525 //              /* layout for clearing */
 526 //              VkImageMemoryBarrier cb;
 527 //              memset(&cb, 0, sizeof cb);
 528 //              cb.sType = VK_STRUCTURE_TYPE_IMAGE_MEMORY_BARRIER;
 529 //              cb.srcAccessMask = VK_ACCESS_MEMORY_READ_BIT;
 530 //              cb.dstAccessMask = VK_ACCESS_TRANSFER_WRITE_BIT;
 531 //              cb.oldLayout = VK_IMAGE_LAYOUT_UNDEFINED;
 532 //              cb.newLayout = VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL;
 533 //              cb.srcQueueFamilyIndex = vkqfamily;
 534 //              cb.dstQueueFamilyIndex = vkqfamily;
 535 //              cb.image = vkswapchain_images[i];
 536 //              cb.subresourceRange = range;
 537
 538 //              /* layout for presenting */
 539 //              VkImageMemoryBarrier pb;
 540 //              memset(&pb, 0, sizeof pb);
 541 //              pb.sType = VK_STRUCTURE_TYPE_IMAGE_MEMORY_BARRIER;
 542 //              pb.srcAccessMask = VK_ACCESS_TRANSFER_WRITE_BIT;
 543 //              pb.dstAccessMask = VK_ACCESS_MEMORY_READ_BIT;
 544 //              pb.oldLayout = VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL;
 545 //              pb.newLayout = VK_IMAGE_LAYOUT_PRESENT_SRC_KHR;
 546 //              pb.srcQueueFamilyIndex = vkqfamily;
 547 //              pb.dstQueueFamilyIndex = vkqfamily;
 548 //              pb.image = vkswapchain_images[i];
 549 //              pb.subresourceRange = range;
 550
 551 //              vkBeginCommandBuffer(swapchain_cmd_bufs[i], &binf);
 552 //              vkCmdPipelineBarrier(swapchain_cmd_bufs[i], VK_PIPELINE_STAGE_TRANSFER_BIT,
 553 //                                   VK_PIPELINE_STAGE_TRANSFER_BIT, 0, 0, 0, 0, 0, 1, &pb);
 554
 555 //              vkCmdClearColorImage(swapchain_cmd_bufs[i], vkswapchain_images[vk_curr_swapchain_image], VK_IMAGE_LAYOUT_GENERAL,
 556 //                                   pcolor, 1, &range);
 557
 558 //              vkCmdPipelineBarrier(swapchain_cmd_bufs[i], VK_PIPELINE_STAGE_TRANSFER_BIT,
 559 //                                   VK_PIPELINE_STAGE_BOTTOM_OF_PIPE_BIT, 0, 0, 0, 0, 0, 1, &cb);
 560
 561 //              if(vkEndCommandBuffer(swapchain_cmd_bufs[i]) != VK_SUCCESS) {
 562 //                      fprintf(stderr, "Failed to record command buffer.\n");
 563 //                      return false;
 564 //              }
 565 //      }
 566 //      return true;
 567 // }
 568
 569 // static bool create_swapchain_cmd_bufs(VkCommandPool cpool)
 570 // {
 571 //      swapchain_cmd_bufs = new VkCommandBuffer[vknum_swapchain_images];
 572
 573 //      VkCommandBufferAllocateInfo ainf;
 574 //      memset(&ainf, 0, sizeof ainf);
 575
 576 //      ainf.sType = VK_STRUCTURE_TYPE_COMMAND_BUFFER_ALLOCATE_INFO;
 577 //      ainf.commandPool = cpool;
 578 //      ainf.level = VK_COMMAND_BUFFER_LEVEL_PRIMARY;
 579 //      ainf.commandBufferCount = (uint32_t)vknum_swapchain_images;
 580
 581 //      if(vkAllocateCommandBuffers(vk_device, &ainf, swapchain_cmd_bufs) != VK_SUCCESS) {
 582 //              fprintf(stderr, "Failed to allocate the swapchain command buffers.\n");
 583 //              return false;
 584 //      }
 585
 586         return true;
 587 }