git.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 //command buffers
  25 static VkCommandBuffer init_buf;
  26 static VkCommandBuffer rbufs[2];
  27 //depth buffer
  28 static VkImage dimg;
  29 static VkImageView dview;
  30 static const VkFormat dformat = VK_FORMAT_D32_SFLOAT_S8_UINT;
  31 //swapchain
  32 static VkImage *images;
  33 static VkImageView *iviews;
  34 static uint32_t num_images;
  35 //renderpass
  36 static VkRenderPass rpass;
  37 static VkFramebuffer fbs[2];
  38 //semaphores-drawing-presentation
  39 static uint32_t curr_img; // current sc image
  40 static VkSemaphore psema;
  41
  42 /* static variables */
  43 static Vec4 clear_color(1, 0.1, 0.1, 1.0);
  44
  45 /* static functions */
  46 static void error_callback(int error, const char *descr);
  47 static void clear(float r, float g, float b);
  48 static void viewport(int x, int y, int width, int height);
  49 static void zbuffer(bool enable);
  50 static void cull_face(Gfx_cull_face cf);
  51 static void reshape(int width, int height);
  52 static void swapbuffers();
  53 static void begin_drawing();
  54 static void end_drawing();
  55
  56 static bool create_swapchain(VkSwapchainKHR *sc);
  57 static bool create_zbuffer();
  58 static bool create_renderpass();
  59 static bool create_framebuffers();
  60 static bool begin_init_command_buffer(VkCommandBuffer *cb);
  61 static bool end_init_command_buffer(VkCommandBuffer *cb);
  62 static bool allocate_rendering_command_buffers(VkCommandBuffer *bufs);
  63 static void free_rendering_command_buffers(VkCommandBuffer *bufs, int count);
  64 static bool begin_rendering_command_buffers(VkCommandBuffer *bufs, int count);
  65
  66 bool init_vulkan()
  67 {
  68         if(!glfwInit()) {
  69                 fprintf(stderr, "Failed to initialize GLFW.\n");
  70                 return false;
  71         }
  72
  73         if(!glfwVulkanSupported()) {
  74                 fprintf(stderr, "No Vulkan support on the device.\n");
  75                 return false;
  76         }
  77
  78         //TODO: remove later
  79         glfwSetErrorCallback(error_callback);
  80
  81         /* create device and command pool! */
  82         if(!vku_create_device()) {
  83                 fprintf(stderr, "Failed to initialize vulkan.\n");
  84                 return false;
  85         }
  86
  87         if(!glfwGetPhysicalDevicePresentationSupport(vk_instance, vk_physical, vk_qfamily)) {
  88                 fprintf(stderr, "Presentation support not found.\n");
  89                 return false;
  90         }
  91
  92         glfwWindowHint(GLFW_CLIENT_API, GLFW_NO_API);
  93         if(!(win = glfwCreateWindow(win_w, win_h, "vkcow", 0, 0))) {
  94                 fprintf(stderr, "Failed to create window.\n");
  95                 return false;
  96         }
  97
  98         VkResult res = glfwCreateWindowSurface(vk_instance, win, 0, &vk_surface);
  99         if(res != VK_SUCCESS) {
 100                 fprintf(stderr, "Failed to create KHR surface: %s\n", vku_get_vulkan_error_str(res));
 101                 return false;
 102         }
 103
 104         if(!create_swapchain(&vk_swapchain)) {
 105                 fprintf(stderr, "Failed to create swapchain.\n");
 106                 return false;
 107         }
 108
 109         init_buf = VK_NULL_HANDLE;
 110         if(!begin_init_command_buffer(&init_buf)) {
 111                 fprintf(stderr, "Failed to start VK_NULL_HANDLE command buffer.\n");
 112                 return false;
 113         }
 114
 115         if(!create_zbuffer()) {
 116                 fprintf(stderr, "Failed to create depth buffer.\n");
 117                 return false;
 118         }
 119
 120         if(!create_renderpass()) {
 121                 fprintf(stderr, "Failed to create the renderpass.\n");
 122                 return false;
 123         }
 124
 125         if(!create_framebuffers()) {
 126                 fprintf(stderr, "Failed to create the framebuffer.\n");
 127                 return false;
 128         }
 129
 130         if(!end_init_command_buffer(&init_buf)) {
 131                 fprintf(stderr, "Failed to end the command buffer.\n");
 132                 return false;
 133         }
 134
 135         /* rendering command buffers */
 136         if(!allocate_rendering_command_buffers(rbufs)) {
 137                 fprintf(stderr, "Failed to allocate rendering command buffers.\n");
 138                 return false;
 139         }
 140
 141         if(!begin_rendering_command_buffers(rbufs, 2)) {
 142                 fprintf(stderr, "Failed to begin rendering command buffers.\n");
 143                 return false;
 144         }
 145
 146         gfx_clear = clear;
 147         gfx_viewport = viewport;
 148         gfx_zbuffer = zbuffer;
 149         gfx_cull_face = cull_face;
 150         gfx_reshape = reshape;
 151         gfx_swapbuffers = swapbuffers;
 152         gfx_begin_drawing = begin_drawing;
 153         gfx_end_drawing = end_drawing;
 154
 155         return true;
 156 }
 157
 158 static bool create_swapchain(VkSwapchainKHR *sc)
 159 {
 160         /* surface capabilities */
 161         VkSurfaceCapabilitiesKHR scap;
 162         if(vkGetPhysicalDeviceSurfaceCapabilitiesKHR(vk_physical, vk_surface, &scap) != VK_SUCCESS) {
 163                 fprintf(stderr, "Failed to get physical device surface capabilities\n");
 164                 return false;
 165         }
 166
 167         /* presentation modes */
 168         uint32_t prmode_cnt;
 169         if(vkGetPhysicalDeviceSurfacePresentModesKHR(vk_physical, vk_surface, &prmode_cnt, 0) != VK_SUCCESS) {
 170                 fprintf(stderr, "Failed to get physical device surface presentation modes count.\n");
 171                 return false;
 172         }
 173
 174         if(prmode_cnt == 0) {
 175                 fprintf(stderr, "Presentation modes not found.\n");
 176                 return false;
 177         }
 178
 179         VkPresentModeKHR scmode = VK_PRESENT_MODE_FIFO_KHR;
 180         VkPresentModeKHR *modes = new VkPresentModeKHR[prmode_cnt];
 181
 182         if(vkGetPhysicalDeviceSurfacePresentModesKHR(vk_physical, vk_surface, &prmode_cnt, modes) != VK_SUCCESS) {
 183                 fprintf(stderr, "Failed to get physical device presentation modes.\n");
 184                 return false;
 185         }
 186
 187         for(uint32_t i=0; i<prmode_cnt; i++) {
 188                 if(modes[i] == VK_PRESENT_MODE_MAILBOX_KHR) {
 189                         scmode = VK_PRESENT_MODE_MAILBOX_KHR;
 190                         break;
 191                 }
 192                 if((scmode != VK_PRESENT_MODE_MAILBOX_KHR) && (modes[i] == VK_PRESENT_MODE_IMMEDIATE_KHR)) {
 193                         //fallback
 194                         scmode = VK_PRESENT_MODE_IMMEDIATE_KHR;
 195                 }
 196         }
 197
 198         /* swapchain extents */
 199         VkExtent2D scextent;
 200         if(scap.currentExtent.width == 0xffffffff || scap.currentExtent.height == 0xffffffff) {
 201                 scextent.width = win_w;
 202                 scextent.height = win_h;
 203         }
 204         else {
 205                 scextent = scap.currentExtent;
 206                 win_w = scextent.width;
 207                 win_h = scextent.height;
 208         }
 209
 210         /* number of swapchain images (on intel that's 3: maybe should hardcode it to 2?) */
 211         num_images = scap.minImageCount; //+ 1;
 212         /* intel doesn't set the maxImageCount */
 213         if(scap.maxImageCount > 0 && num_images > scap.maxImageCount)
 214                 num_images = scap.maxImageCount;
 215
 216         printf("num_images : %u\n", num_images);
 217         assert(num_images > 0);
 218
 219         images = new VkImage[num_images];
 220         iviews = new VkImageView[num_images];
 221
 222         /* transform flags */
 223         VkSurfaceTransformFlagBitsKHR pre_transf = scap.currentTransform;
 224         if(scap.supportedTransforms & VK_SURFACE_TRANSFORM_IDENTITY_BIT_KHR)
 225                 pre_transf = VK_SURFACE_TRANSFORM_IDENTITY_BIT_KHR;
 226
 227         /* find suitable colorspace, format */
 228         VkFormat format;
 229         VkColorSpaceKHR colorspace;
 230
 231         VkSurfaceFormatKHR sformat;
 232         if(!vku_get_surface_format(vk_physical, vk_surface, &sformat)) {
 233                 return false;
 234         }
 235
 236         format = sformat.format;
 237         colorspace = sformat.colorSpace;
 238
 239         /* creating the swapchain */
 240         VkSwapchainCreateInfoKHR sinfo;
 241         memset(&sinfo, 0, sizeof sinfo);
 242
 243         sinfo.sType = VK_STRUCTURE_TYPE_SWAPCHAIN_CREATE_INFO_KHR;
 244         sinfo.surface = vk_surface;
 245         sinfo.minImageCount = num_images;
 246         sinfo.imageFormat = format;
 247         sinfo.imageColorSpace = colorspace;
 248         sinfo.imageExtent = scextent;
 249         sinfo.imageUsage = VK_IMAGE_USAGE_COLOR_ATTACHMENT_BIT;
 250         sinfo.preTransform = pre_transf;
 251         sinfo.compositeAlpha = VK_COMPOSITE_ALPHA_OPAQUE_BIT_KHR;
 252         sinfo.imageArrayLayers = 1;
 253         sinfo.imageSharingMode = VK_SHARING_MODE_EXCLUSIVE;
 254         sinfo.presentMode = scmode;
 255         sinfo.oldSwapchain = VK_NULL_HANDLE; //TODO
 256         sinfo.clipped = VK_TRUE; //TODO
 257
 258         if(vkCreateSwapchainKHR(vk_device, &sinfo, 0, sc) != VK_SUCCESS) {
 259                 fprintf(stderr, "Failed to create swapchain.\n");
 260                 return false;
 261         }
 262
 263         if(vkGetSwapchainImagesKHR(vk_device, *sc, &num_images, 0) != VK_SUCCESS) {
 264                 fprintf(stderr, "Failed to get the number of the swapchain images.\n");
 265                 return false;
 266         }
 267
 268         if(vkGetSwapchainImagesKHR(vk_device, *sc, &num_images, images) != VK_SUCCESS) {
 269                 fprintf(stderr, "Failed to get the swapchain images.\n");
 270                 return false;
 271         }
 272
 273         VkImageViewCreateInfo ivinf;
 274         memset(&ivinf, 0, sizeof ivinf);
 275         ivinf.sType = VK_STRUCTURE_TYPE_IMAGE_VIEW_CREATE_INFO;
 276         ivinf.format = format;
 277         ivinf.components = {
 278                 VK_COMPONENT_SWIZZLE_R,
 279                 VK_COMPONENT_SWIZZLE_G,
 280                 VK_COMPONENT_SWIZZLE_B,
 281                 VK_COMPONENT_SWIZZLE_A
 282         };
 283         ivinf.subresourceRange.aspectMask = VK_IMAGE_ASPECT_COLOR_BIT;
 284         ivinf.subresourceRange.levelCount = 1;
 285         ivinf.subresourceRange.layerCount = 1;
 286         ivinf.viewType = VK_IMAGE_VIEW_TYPE_2D;
 287
 288         for(uint32_t i=0; i<num_images; i++) {
 289                 ivinf.image = images[i];
 290
 291                 VkResult res;
 292                 if((res = vkCreateImageView(vk_device, &ivinf, 0, &iviews[i])) != VK_SUCCESS) {
 293                         fprintf(stderr, "Failed to create image view %d: %s.\n", i, vku_get_vulkan_error_str(res));
 294                         return false;
 295                 }
 296         }
 297
 298         return true;
 299 }
 300
 301 static bool begin_init_command_buffer(VkCommandBuffer *cb)
 302 {
 303         if(*cb == VK_NULL_HANDLE) {
 304                 *cb = vku_alloc_cmdbuf(vk_pool, VK_COMMAND_BUFFER_LEVEL_PRIMARY);
 305
 306                 VkCommandBufferInheritanceInfo ciinf;
 307                 memset(&ciinf, 0, sizeof ciinf);
 308                 ciinf.sType = VK_STRUCTURE_TYPE_COMMAND_BUFFER_INHERITANCE_INFO;
 309                 ciinf.renderPass = VK_NULL_HANDLE;
 310                 ciinf.framebuffer = VK_NULL_HANDLE;
 311                 ciinf.occlusionQueryEnable = VK_FALSE;
 312
 313                 VkCommandBufferBeginInfo cbinf;
 314                 memset(&cbinf, 0, sizeof cbinf);
 315                 cbinf.sType = VK_STRUCTURE_TYPE_COMMAND_BUFFER_BEGIN_INFO;
 316                 cbinf.pInheritanceInfo = &ciinf;
 317
 318                 if(vkBeginCommandBuffer(*cb, &cbinf) != VK_SUCCESS) {
 319                         fprintf(stderr, "Failed to begin command buffer.\n");
 320                         return false;
 321                 }
 322         }
 323         return true;
 324 }
 325
 326 static bool create_zbuffer()
 327 {
 328         VkImageCreateInfo dinfo;
 329         memset(&dinfo, 0, sizeof dinfo);
 330
 331         dinfo.sType = VK_STRUCTURE_TYPE_IMAGE_CREATE_INFO;
 332         dinfo.imageType = VK_IMAGE_TYPE_2D;
 333         dinfo.format = dformat;
 334         dinfo.extent = {(uint32_t)win_w, (uint32_t)win_h, 1};
 335         dinfo.mipLevels = 1;
 336         dinfo.arrayLayers = 1;
 337         dinfo.samples = VK_SAMPLE_COUNT_1_BIT;
 338         dinfo.tiling = VK_IMAGE_TILING_OPTIMAL;
 339         dinfo.usage = VK_IMAGE_USAGE_DEPTH_STENCIL_ATTACHMENT_BIT;
 340
 341         if(vkCreateImage(vk_device, &dinfo, 0, &dimg) != VK_SUCCESS) {
 342                 fprintf(stderr, "Failed to create depth buffer image.\n");
 343                 return false;
 344         }
 345
 346         VkMemoryRequirements dmem_reqs;
 347         vkGetImageMemoryRequirements(vk_device, dimg, &dmem_reqs);
 348
 349         DevMemBlock block;
 350         if(!vku_allocate(dmem_reqs.size, &block)) {
 351                 fprintf(stderr, "Failed to allocate zbuffer image.\n");
 352                 return false;
 353         }
 354
 355         vkBindImageMemory(vk_device, dimg, block.dev_mem, 0);
 356
 357         if(!vk_image_set_layout(init_buf, dimg, VK_IMAGE_ASPECT_DEPTH_BIT,
 358                                 VK_IMAGE_LAYOUT_UNDEFINED, VK_IMAGE_LAYOUT_DEPTH_STENCIL_ATTACHMENT_OPTIMAL,
 359                                 (VkAccessFlagBits)0)) {
 360                 fprintf(stderr, "Failed to set depth buffer layout.\n");
 361                 return false;
 362         }
 363
 364         VkImageViewCreateInfo div_inf;
 365         memset(&div_inf, 0, sizeof div_inf);
 366
 367         div_inf.sType = VK_STRUCTURE_TYPE_IMAGE_VIEW_CREATE_INFO;
 368         div_inf.image = dimg;
 369         div_inf.format = dformat;
 370         div_inf.subresourceRange.aspectMask = VK_IMAGE_ASPECT_DEPTH_BIT;
 371         div_inf.subresourceRange.levelCount = 1;
 372         div_inf.subresourceRange.layerCount = 1;
 373         div_inf.viewType = VK_IMAGE_VIEW_TYPE_2D;
 374
 375         if(vkCreateImageView(vk_device, &div_inf, 0, &dview) != VK_SUCCESS) {
 376                 fprintf(stderr, "Failed to create image view for depth buffer.\n");
 377                 return false;
 378         }
 379
 380         return true;
 381 }
 382
 383 static bool create_renderpass()
 384 {
 385         VkSurfaceFormatKHR sformat;
 386         if(!vku_get_surface_format(vk_physical, vk_surface, &sformat)) {
 387                 fprintf(stderr, "Failed to get surface format.\n");
 388                 return false;
 389         }
 390
 391         VkAttachmentDescription att[2];
 392         memset(&att, 0, (sizeof att[0]) * 2);
 393
 394         att[0].format = sformat.format;
 395         att[0].samples = VK_SAMPLE_COUNT_1_BIT;
 396         att[0].loadOp = VK_ATTACHMENT_LOAD_OP_CLEAR;
 397         att[0].storeOp = VK_ATTACHMENT_STORE_OP_DONT_CARE;
 398         att[0].stencilLoadOp = VK_ATTACHMENT_LOAD_OP_DONT_CARE;
 399         att[0].stencilStoreOp = VK_ATTACHMENT_STORE_OP_DONT_CARE;
 400         att[0].initialLayout = VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL;
 401         att[0].finalLayout = VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL;
 402
 403         att[1].format = dformat;
 404         att[1].samples = VK_SAMPLE_COUNT_1_BIT;
 405         att[1].loadOp = VK_ATTACHMENT_LOAD_OP_CLEAR;
 406         att[1].storeOp = VK_ATTACHMENT_STORE_OP_DONT_CARE;
 407         att[1].stencilLoadOp = VK_ATTACHMENT_LOAD_OP_DONT_CARE;
 408         att[1].stencilStoreOp = VK_ATTACHMENT_STORE_OP_DONT_CARE;
 409         att[1].initialLayout = VK_IMAGE_LAYOUT_DEPTH_STENCIL_ATTACHMENT_OPTIMAL;
 410         att[1].finalLayout = VK_IMAGE_LAYOUT_DEPTH_STENCIL_ATTACHMENT_OPTIMAL;
 411
 412         VkAttachmentReference cref;
 413         memset(&cref, 0, sizeof cref);
 414         cref.layout = VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL;
 415
 416         VkAttachmentReference dref;
 417         memset(&dref, 0, sizeof dref);
 418         dref.attachment = 1;
 419         dref.layout = VK_IMAGE_LAYOUT_DEPTH_STENCIL_ATTACHMENT_OPTIMAL;
 420
 421         VkSubpassDescription sd;
 422         memset(&sd, 0, sizeof sd);
 423         sd.pipelineBindPoint = VK_PIPELINE_BIND_POINT_GRAPHICS;
 424         sd.colorAttachmentCount = 1;
 425         sd.pColorAttachments = &cref;
 426         sd.pDepthStencilAttachment = &dref;
 427
 428         VkRenderPassCreateInfo rinf;
 429         memset(&rinf, 0, sizeof rinf);
 430         rinf.sType = VK_STRUCTURE_TYPE_RENDER_PASS_CREATE_INFO;
 431         rinf.attachmentCount = 2;
 432         rinf.pAttachments = att;
 433         rinf.subpassCount = 1;
 434         rinf.pSubpasses = &sd;
 435
 436         if(vkCreateRenderPass(vk_device, &rinf, 0, &rpass) != VK_SUCCESS) {
 437                 fprintf(stderr, "Failed to create rpass.\n");
 438                 return false;
 439         }
 440
 441         return true;
 442 }
 443
 444 static bool create_framebuffers()
 445 {
 446         /* framebuffer attachments */
 447         VkImageView fb_att[2];
 448         fb_att[1] = dview;
 449
 450         VkFramebufferCreateInfo fbinf;
 451         memset(&fbinf, 0, sizeof fbinf);
 452         fbinf.sType = VK_STRUCTURE_TYPE_FRAMEBUFFER_CREATE_INFO;
 453         fbinf.renderPass = rpass;
 454         fbinf.attachmentCount = 2;
 455         fbinf.pAttachments = fb_att;
 456         fbinf.width = win_w;
 457         fbinf.height = win_h;
 458         fbinf.layers = 1;
 459
 460         for(int i=0; i<2; i++) {
 461                 fb_att[0] = iviews[i];
 462                 if(vkCreateFramebuffer(vk_device, &fbinf, 0, &fbs[i]) != VK_SUCCESS) {
 463                         fprintf(stderr, "Failed to create framebuffer %i\n", i);
 464                         return false;
 465                 }
 466         }
 467         return true;
 468 }
 469
 470 static bool end_init_command_buffer(VkCommandBuffer *cb)
 471 {
 472         if(vkEndCommandBuffer(*cb) != VK_SUCCESS) {
 473                 fprintf(stderr, "Failed to end command buffer.\n");
 474                 return false;
 475         }
 476
 477         VkSubmitInfo si;
 478         memset(&si, 0, sizeof si);
 479         si.sType = VK_STRUCTURE_TYPE_SUBMIT_INFO;
 480         si.commandBufferCount = 1;
 481         si.pCommandBuffers = cb;
 482
 483         if(vkQueueSubmit(vk_queue, 1, &si, VK_NULL_HANDLE) != VK_SUCCESS) {
 484                 fprintf(stderr, "Failed to submit null queue.\n");
 485                 return false;
 486         }
 487
 488         if(vkQueueWaitIdle(vk_queue) != VK_SUCCESS) {
 489                 fprintf(stderr, "QueueWaitIdle failure!\n");
 490                 return false;
 491         }
 492
 493         vkFreeCommandBuffers(vk_device, vk_pool, 1, cb);
 494         *cb = VK_NULL_HANDLE;
 495
 496         return true;
 497 }
 498
 499 static bool allocate_rendering_command_buffers(VkCommandBuffer *bufs)
 500 {
 501         return vku_alloc_cmdbufs(vk_pool, VK_COMMAND_BUFFER_LEVEL_PRIMARY,
 502                                  2, bufs);
 503 }
 504
 505 static void free_rendering_command_buffers(VkCommandBuffer *bufs, int count)
 506 {
 507         for(int i=0; i<count; i++) {
 508                 vku_free_cmdbuf(vk_pool, bufs[i]);
 509         }
 510 }
 511
 512 static bool begin_rendering_command_buffers(VkCommandBuffer *bufs, int count)
 513 {
 514         VkCommandBufferInheritanceInfo iinf;
 515         memset(&iinf, 0, sizeof iinf);
 516         iinf.sType = VK_STRUCTURE_TYPE_COMMAND_BUFFER_INHERITANCE_INFO;
 517         iinf.renderPass = VK_NULL_HANDLE;
 518         iinf.framebuffer = VK_NULL_HANDLE;
 519
 520         VkCommandBufferBeginInfo binf;
 521         memset(&binf, 0, sizeof binf);
 522         binf.sType = VK_STRUCTURE_TYPE_COMMAND_BUFFER_BEGIN_INFO;
 523         binf.pInheritanceInfo = &iinf;
 524
 525         // setting clear values
 526         VkClearValue clvals[2];
 527         for(int i=0; i<4; i++) {
 528                 clvals[0].color.float32[i] = clear_color[i];
 529         }
 530         clvals[1].depthStencil = {1.0f, 0};
 531
 532         //build drawing command buffers
 533         for(int i=0; i<count; i++) {
 534                 if(vkBeginCommandBuffer(bufs[i], &binf) != VK_SUCCESS) {
 535                         fprintf(stderr, "Failed to begin command buffer: %d\n", i);
 536                         return false;
 537                 }
 538
 539                 VkImageMemoryBarrier imbarr;
 540                 memset(&imbarr, 0, sizeof imbarr);
 541                 imbarr.sType = VK_STRUCTURE_TYPE_IMAGE_MEMORY_BARRIER;
 542                 imbarr.dstAccessMask = VK_ACCESS_COLOR_ATTACHMENT_WRITE_BIT;
 543                 imbarr.oldLayout = VK_IMAGE_LAYOUT_UNDEFINED;
 544                 imbarr.newLayout = VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL;
 545                 imbarr.srcQueueFamilyIndex = VK_QUEUE_FAMILY_IGNORED;
 546                 imbarr.dstQueueFamilyIndex = VK_QUEUE_FAMILY_IGNORED;
 547                 imbarr.image = images[i];
 548                 imbarr.subresourceRange = {VK_IMAGE_ASPECT_COLOR_BIT, 0, 1, 0, 1};
 549                 vkCmdPipelineBarrier(bufs[i], VK_PIPELINE_STAGE_ALL_COMMANDS_BIT, VK_PIPELINE_STAGE_BOTTOM_OF_PIPE_BIT, 0, 0, 0, 0, 0, 1, &imbarr);
 550
 551                 VkRenderPassBeginInfo rbinf;
 552                 memset(&rbinf, 0, sizeof rbinf);
 553                 rbinf.sType = VK_STRUCTURE_TYPE_RENDER_PASS_BEGIN_INFO;
 554                 rbinf.renderPass = rpass;
 555                 rbinf.framebuffer = fbs[i];
 556                 rbinf.renderArea.extent.width = win_w;
 557                 rbinf.renderArea.extent.height = win_h;
 558                 rbinf.clearValueCount = count;
 559                 rbinf.pClearValues = clvals;
 560
 561                 vkCmdBeginRenderPass(bufs[i], &rbinf, VK_SUBPASS_CONTENTS_INLINE);
 562                 VkViewport viewport;
 563                 memset(&viewport, 0, sizeof viewport);
 564                 viewport.width = (float)win_w;
 565                 viewport.height = (float)win_h;
 566                 viewport.maxDepth = 1.0f;
 567                 vkCmdSetViewport(bufs[i], 0, 1, &viewport);
 568
 569                 VkRect2D scissor;
 570                 memset(&scissor, 0, sizeof scissor);
 571                 scissor.extent.width = win_w;
 572                 scissor.extent.height = win_h;
 573                 vkCmdSetScissor(bufs[i], 0, 1, &scissor);
 574                 vkCmdEndRenderPass(bufs[i]);
 575
 576                 /* pre-present barrier */
 577                 VkImageMemoryBarrier ppb;
 578                 memset(&ppb, 0, sizeof ppb);
 579                 ppb.sType = VK_STRUCTURE_TYPE_IMAGE_MEMORY_BARRIER;
 580                 ppb.srcAccessMask = VK_ACCESS_COLOR_ATTACHMENT_WRITE_BIT;
 581                 ppb.dstAccessMask = VK_ACCESS_MEMORY_READ_BIT;
 582                 ppb.oldLayout = VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL;
 583                 ppb.newLayout = VK_IMAGE_LAYOUT_PRESENT_SRC_KHR;
 584                 ppb.srcQueueFamilyIndex = VK_QUEUE_FAMILY_IGNORED;
 585                 ppb.dstQueueFamilyIndex = VK_QUEUE_FAMILY_IGNORED;
 586                 ppb.subresourceRange = {VK_IMAGE_ASPECT_COLOR_BIT, 0, 1, 0, 1};
 587                 ppb.image = images[i];
 588
 589                 vkCmdPipelineBarrier(bufs[i], VK_PIPELINE_STAGE_ALL_COMMANDS_BIT, VK_PIPELINE_STAGE_BOTTOM_OF_PIPE_BIT, 0, 0, 0, 0, 0, 1, &ppb);
 590
 591                 if(vkEndCommandBuffer(bufs[i]) != VK_SUCCESS) {
 592                         fprintf(stderr, "Failed to end command buffer: %d\n", i);
 593                         return false;
 594                 }
 595         }
 596         return true;
 597 }
 598
 599 void cleanup_vulkan()
 600 {
 601         free_rendering_command_buffers(rbufs, 2);
 602         if(win) {
 603                 glfwDestroyWindow(win);
 604         }
 605         glfwTerminate();
 606
 607         //TODOs according to the book:
 608         // 1- make sure all threads have been terminated (when I add threads)
 609         vku_cleanup();
 610 }
 611
 612 static void error_callback(int error, const char *description)
 613 {
 614         fprintf(stderr, "GLFW error %d: %s.\n", error, description);
 615 }
 616
 617 static void reshape(int width, int height)
 618 {
 619 }
 620
 621 static void clear(float r, float g, float b)
 622 {
 623 }
 624
 625 static void viewport(int x, int y, int width, int height)
 626 {
 627 }
 628
 629 static void zbuffer(bool enable)
 630 {
 631 }
 632
 633 static void cull_face(Gfx_cull_face cf)
 634 {
 635 }
 636
 637 static void swapbuffers()
 638 {
 639 }
 640
 641 static void begin_drawing()
 642 {
 643         VkSemaphoreCreateInfo psinf;
 644         memset(&psinf, 0, sizeof psinf);
 645         psinf.sType = VK_STRUCTURE_TYPE_SEMAPHORE_CREATE_INFO;
 646
 647         VkResult res;
 648         if((res = vkCreateSemaphore(vk_device, &psinf, 0, &psema)) != VK_SUCCESS) {
 649                 fprintf(stderr, "Failed to create semaphore.\n");
 650         }
 651         assert(res == VK_SUCCESS);
 652 }
 653
 654 static void end_drawing()
 655 {
 656         VkResult res = vkAcquireNextImageKHR(vk_device, vk_swapchain,
 657                                              UINT64_MAX, psema, VK_NULL_HANDLE, &curr_img);
 658         if(res == VK_ERROR_OUT_OF_DATE_KHR) {
 659                 fprintf(stderr, "Swapchain out of date.\n");
 660                 return;
 661         }
 662         assert(res == VK_SUCCESS);
 663
 664         VkSubmitInfo sinf;
 665         memset(&sinf, 0, sizeof sinf);
 666         VkPipelineStageFlags psflags = VK_PIPELINE_STAGE_BOTTOM_OF_PIPE_BIT;
 667         sinf.sType = VK_STRUCTURE_TYPE_SUBMIT_INFO;
 668         sinf.waitSemaphoreCount = 1;
 669         sinf.pWaitSemaphores = &psema;
 670         sinf.pWaitDstStageMask = &psflags;
 671         sinf.commandBufferCount = 1;
 672         sinf.pCommandBuffers = &rbufs[curr_img];
 673
 674         res = vkQueueSubmit(vk_queue, 1, &sinf, VK_NULL_HANDLE);
 675         assert(res == VK_SUCCESS);
 676
 677         VkPresentInfoKHR pinf;
 678         memset(&pinf, 0, sizeof pinf);
 679         pinf.sType = VK_STRUCTURE_TYPE_PRESENT_INFO_KHR;
 680         pinf.swapchainCount = 1;
 681         pinf.pSwapchains = &vk_swapchain;
 682         pinf.pImageIndices = &curr_img;
 683
 684         res = vkQueuePresentKHR(vk_queue, &pinf);
 685         if(res == VK_ERROR_OUT_OF_DATE_KHR) {
 686                 fprintf(stderr, "Swapchain out of date.\n");
 687         }
 688         assert(res == VK_SUCCESS);
 689
 690         res = vkQueueWaitIdle(vk_queue);
 691         assert(res == VK_SUCCESS);
 692
 693         vkDestroySemaphore(vk_device, psema, 0);
 694 }