ogl_beamforming

Ultrasound Beamforming Implemented with OpenGL
git clone anongit@rnpnr.xyz:ogl_beamforming.git
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vulkan.c (98078B)


      1 /* See LICENSE for license details. */
      2 // TODO(rnp)
      3 // [ ]: what is needed for HDR? I think it makes sense to just default to it nowadays
      4 // [ ]: once opengl is removed switch images to SRGB and/or 16 bit Float
      5 
      6 #include "beamformer_internal.h"
      7 #include "vulkan.h"
      8 #include "external/glslang/glslang/Include/glslang_c_interface.h"
      9 
     10 #define ForceSingleQueue (0)
     11 
     12 #define glslang_info(s) str8("[glslang] " s)
     13 #define vulkan_info(s)  str8("[vulkan]  " s)
     14 
     15 #define ValidVulkanHandle(h) ((h).value[0] != 0)
     16 
     17 #define MaxCommandBuffersInFlight  (3)
     18 #define MaxCommandBufferTimestamps (1024)
     19 
     20 typedef enum {
     21 	VulkanQueueKind_Graphics,
     22 	VulkanQueueKind_Compute,
     23 	VulkanQueueKind_Transfer,
     24 	VulkanQueueKind_Count,
     25 } VulkanQueueKind;
     26 
     27 typedef enum {
     28 	VulkanMemoryKind_Device,
     29 	VulkanMemoryKind_BAR,
     30 	VulkanMemoryKind_Host,
     31 	VulkanMemoryKind_Count,
     32 } VulkanMemoryKind;
     33 
     34 typedef struct {
     35 	VkDeviceMemory    memory;
     36 	VkBuffer          buffer;
     37 	u64               memory_size;
     38 
     39 	void *            host_pointer;
     40 
     41 	VulkanMemoryKind  memory_kind;
     42 
     43 	// NOTE: only used when the buffer is backing a VulkanRenderModel.
     44 	VkIndexType       index_type;
     45 } VulkanBuffer;
     46 
     47 typedef struct {
     48 	VkDeviceMemory    memory;
     49 	VkImage           image;
     50 	VkImageView       view;
     51 } VulkanImage;
     52 
     53 typedef struct {
     54 	VkPipeline         pipeline;
     55 	VkPipelineLayout   layout;
     56 	VkShaderStageFlags stage_flags;
     57 } VulkanPipeline;
     58 
     59 typedef struct {
     60 	VkSemaphore semaphore;
     61 	u64         value;
     62 } VulkanSemaphore;
     63 
     64 typedef struct {
     65 	GPUTimeline timeline;
     66 	u32         buffer_index;
     67 	// NOTE(rnp): since there may not be QueueKind_Count queues, when putting values into this
     68 	// array you must be careful to map through the queue_indices array in the vulkan_context.
     69 	u64 in_flight_wait_values[VulkanQueueKind_Count];
     70 } VulkanCommandBuffer;
     71 
     72 typedef enum {
     73 	VulkanEntityKind_Buffer,
     74 	VulkanEntityKind_CommandBuffer,
     75 	VulkanEntityKind_Image,
     76 	VulkanEntityKind_Pipeline,
     77 	VulkanEntityKind_RenderModel,
     78 	VulkanEntityKind_Semaphore,
     79 } VulkanEntityKind;
     80 
     81 typedef struct VulkanEntity VulkanEntity;
     82 struct VulkanEntity {
     83 	VulkanEntity *   next;
     84 	VulkanEntityKind kind;
     85 	union {
     86 		VulkanBuffer        buffer;
     87 		VulkanCommandBuffer command_buffer;
     88 		VulkanImage         image;
     89 		VulkanPipeline      pipeline;
     90 		VulkanSemaphore     semaphore;
     91 	} as;
     92 };
     93 
     94 typedef alignas(64) struct {
     95 	i32 lock;
     96 
     97 	u16     queue_family;
     98 	u16     queue_index;
     99 	VkQueue queue;
    100 
    101 	VulkanSemaphore timeline_semaphore;
    102 
    103 	VkPipelineStageFlags2 pipeline_stage_flags;
    104 } VulkanQueue;
    105 static_assert(alignof(VulkanQueue) == 64, "VulkanQueue must be placed on its own cacheline");
    106 
    107 typedef alignas(64) struct {
    108 	i32             lock;
    109 	u32             next_command_buffer_index;
    110 
    111 	VulkanPipeline *bound_pipeline;
    112 
    113 	u64             last_submission_values[MaxCommandBuffersInFlight];
    114 	u64             timestamp_counts[MaxCommandBuffersInFlight];
    115 
    116 	VkCommandPool   handle;
    117 	VkQueryPool     query_pool;
    118 	VkCommandBuffer buffers[MaxCommandBuffersInFlight];
    119 } VulkanCommandPool;
    120 
    121 typedef struct {
    122 	Arena            *arena;
    123 	i32               arena_lock;
    124 
    125 	VkInstance        handle;
    126 	VkDevice          device;
    127 	VkPhysicalDevice  physical_device;
    128 
    129 	// NOTE(rnp): fallback for when a shader fails to compile
    130 	VulkanPipeline    default_compute_pipeline;
    131 	VulkanPipeline    default_graphics_pipeline;
    132 
    133 	GPUInfo           gpu_info;
    134 
    135 	struct {
    136 		u64             max_allocation_size;
    137 		u64             non_coherent_atom_size;
    138 		u8              gpu_heap_index;
    139 		i8              memory_type_indices[VulkanMemoryKind_Count];
    140 		b8              memory_host_coherent[VulkanMemoryKind_Count];
    141 		static_assert(VK_MAX_MEMORY_HEAPS < I8_MAX, "");
    142 		static_assert(VK_MAX_MEMORY_TYPES < U8_MAX, "");
    143 	} memory_info;
    144 
    145 	VulkanCommandPool *command_pools[GPUTimeline_Count];
    146 	VulkanQueue       *queues[VulkanQueueKind_Count];
    147 	// NOTE(rnp): there are a few places in the code where simply going through the queues map
    148 	// is not sufficient. those places need to know of the unique queues which unique queue
    149 	// is being referred to. that code uses this map instead.
    150 	u16               queue_indices[VulkanQueueKind_Count];
    151 	u16               unique_queues;
    152 
    153 	VkFormat          swap_chain_image_format;
    154 	VkFormat          depth_stencil_format;
    155 
    156 
    157 	VulkanEntity     *entity_freelist;
    158 	Arena            *entity_arena;
    159 	i32               entity_lock;
    160 } VulkanContext;
    161 
    162 read_only global const char *vk_required_instance_extensions[] = {
    163 };
    164 
    165 #if OS_WINDOWS
    166 #define VK_OS_REQUIRED_DEVICE_EXTENSIONS_LIST \
    167 	X("VK_KHR_external_memory_win32") \
    168 	X("VK_KHR_external_semaphore_win32") \
    169 
    170 #else
    171 #define VK_OS_REQUIRED_DEVICE_EXTENSIONS_LIST \
    172 	X("VK_KHR_external_memory_fd") \
    173 	X("VK_KHR_external_semaphore_fd") \
    174 
    175 #endif
    176 
    177 #define VK_REQUIRED_DEVICE_EXTENSIONS_LIST \
    178 	X("VK_KHR_16bit_storage") \
    179 	X("VK_KHR_8bit_storage") \
    180 	X("VK_KHR_external_memory") \
    181 	X("VK_KHR_external_semaphore") \
    182 	X("VK_KHR_storage_buffer_storage_class") \
    183 	X("VK_KHR_timeline_semaphore") \
    184 	VK_OS_REQUIRED_DEVICE_EXTENSIONS_LIST
    185 
    186 #define X(str) str8_comp(str),
    187 read_only global str8 vk_required_device_extensions[] = {VK_REQUIRED_DEVICE_EXTENSIONS_LIST};
    188 #undef X
    189 
    190 #define VK_OPTIONAL_DEVICE_EXTENSIONS_LIST \
    191 	X(VK_KHR, cooperative_matrix) \
    192 
    193 #define X(p, s, ...) str8_comp(#p "_" #s),
    194 read_only global str8 vk_optional_device_extensions[] = {VK_OPTIONAL_DEVICE_EXTENSIONS_LIST};
    195 #undef X
    196 
    197 #define VK_REQUIRED_PHYSICAL_FEATURES \
    198 	X(shaderInt16) \
    199 	X(shaderInt64) \
    200 
    201 #define VK_REQUIRED_PHYSICAL_11_FEATURES \
    202 	X(storageBuffer16BitAccess) \
    203 
    204 #define VK_REQUIRED_PHYSICAL_12_FEATURES \
    205 	X(bufferDeviceAddress) \
    206 	X(shaderFloat16) \
    207 	X(shaderInt8) \
    208 	X(storageBuffer8BitAccess) \
    209 	X(timelineSemaphore) \
    210 	X(vulkanMemoryModel) \
    211 
    212 #define VK_REQUIRED_PHYSICAL_13_FEATURES \
    213 	X(dynamicRendering) \
    214 	X(synchronization2) \
    215 
    216 #define VK_DEBUG_EXTENSIONS \
    217 	X(VK_KHR, shader_non_semantic_info) \
    218 	X(VK_KHR, shader_relaxed_extended_instruction) \
    219 
    220 #define X(p, s, ...) str8_comp(#p "_" #s),
    221 read_only global str8 vk_debug_extensions[] = {VK_DEBUG_EXTENSIONS};
    222 #undef X
    223 
    224 #define VK_INSTANCE_DEBUG_EXTENSIONS_LIST \
    225 	X(VK_EXT, debug_utils) \
    226 
    227 #define X(p, s, ...) str8_comp(#p "_" #s),
    228 read_only global str8 vk_instance_debug_extensions[] = {VK_INSTANCE_DEBUG_EXTENSIONS_LIST};
    229 #undef X
    230 
    231 #if BEAMFORMER_DEBUG
    232 #define VK_VALIDATION_LAYERS_LIST \
    233 	X(KHRONOS, validation) \
    234 
    235 #else
    236 #define VK_VALIDATION_LAYERS_LIST
    237 #endif
    238 
    239 read_only global str8 vk_validation_layers[] = {
    240 	#define X(vendor, name, ...) str8_comp("VK_LAYER_" #vendor "_" #name),
    241 	VK_VALIDATION_LAYERS_LIST
    242 	#undef X
    243 };
    244 
    245 global struct {
    246 	u32 driver_api_version;
    247 	union {
    248 		struct {
    249 			#define X(_, name, ...) b8 name;
    250 			VK_OPTIONAL_DEVICE_EXTENSIONS_LIST
    251 			#undef X
    252 		};
    253 		b8 E[countof(vk_optional_device_extensions)];
    254 	} optional;
    255 
    256 	union {
    257 		struct {
    258 			#define X(_, name, ...) b8 name;
    259 			VK_DEBUG_EXTENSIONS
    260 			#undef X
    261 		};
    262 		b8 E[countof(vk_debug_extensions)];
    263 	} debug;
    264 
    265 	union {
    266 		struct {
    267 			#define X(_, name, ...) b8 name;
    268 			VK_INSTANCE_DEBUG_EXTENSIONS_LIST
    269 			#undef X
    270 		};
    271 		b8 E[countof(vk_instance_debug_extensions)];
    272 	} instance;
    273 
    274 	#if BEAMFORMER_DEBUG
    275 	struct {
    276 		union {
    277 			struct {
    278 				#define X(_, name, ...) b8 name;
    279 				VK_VALIDATION_LAYERS_LIST
    280 				#undef X
    281 			};
    282 			b8 E[countof(vk_validation_layers)];
    283 		} enabled;
    284 
    285 		union {
    286 			struct {
    287 				#define X(_, name, ...) u32 name;
    288 				VK_VALIDATION_LAYERS_LIST
    289 				#undef X
    290 			};
    291 			u32 E[countof(vk_validation_layers)];
    292 		} version;
    293 	} layers;
    294 	#endif
    295 } vulkan_config;
    296 
    297 #define MAX_ENABLED_EXTENSIONS (  countof(vk_required_device_extensions) \
    298                                 + countof(vk_optional_device_extensions) \
    299                                 + countof(vk_debug_extensions) \
    300                                )
    301 
    302 global VulkanContext vulkan_context[1];
    303 
    304 /* NOTE(rnp): the idea here is to set reasonable development constraints.
    305  * They should probably not match one to one with the maximums of the dev
    306  * machine's hardware. Instead these are here to cause compile time failure
    307  * for features which are not expected to work everywhere. */
    308 global glslang_resource_t glslc_resource_constraints[1] = {{
    309 	.max_compute_work_group_count_x = 65535,
    310 	.max_compute_work_group_count_y = 65535,
    311 	.max_compute_work_group_count_z = 65535,
    312 	.max_compute_work_group_size_x  = 1024,
    313 	.max_compute_work_group_size_y  = 1024,
    314 	.max_compute_work_group_size_z  = 1024,
    315 
    316 	// NOTE: taken from glslang defaults
    317 	.max_lights = 32,
    318 	.max_clip_planes = 6,
    319 	.max_texture_units = 32,
    320 	.max_texture_coords = 32,
    321 	.max_vertex_attribs = 64,
    322 	.max_vertex_uniform_components = 4096,
    323 	.max_varying_floats = 64,
    324 	.max_vertex_texture_image_units = 32,
    325 	.max_combined_texture_image_units = 80,
    326 	.max_texture_image_units = 32,
    327 	.max_fragment_uniform_components = 4096,
    328 	.max_draw_buffers = 32,
    329 	.max_vertex_uniform_vectors = 128,
    330 	.max_varying_vectors = 8,
    331 	.max_fragment_uniform_vectors = 16,
    332 	.max_vertex_output_vectors = 16,
    333 	.max_fragment_input_vectors = 15,
    334 	.min_program_texel_offset = -8,
    335 	.max_program_texel_offset = 7,
    336 	.max_clip_distances = 8,
    337 	.max_compute_uniform_components = 1024,
    338 	.max_compute_texture_image_units = 16,
    339 	.max_compute_image_uniforms = 8,
    340 	.max_compute_atomic_counters = 8,
    341 	.max_compute_atomic_counter_buffers = 1,
    342 	.max_varying_components = 60,
    343 	.max_vertex_output_components = 64,
    344 	.max_fragment_input_components = 128,
    345 	.max_image_units = 8,
    346 	.max_combined_image_units_and_fragment_outputs = 8,
    347 	.max_combined_shader_output_resources = 8,
    348 	.max_image_samples = 0,
    349 	.max_vertex_image_uniforms = 0,
    350 	.max_fragment_image_uniforms = 8,
    351 	.max_combined_image_uniforms = 8,
    352 	.max_viewports = 16,
    353 	.max_vertex_atomic_counters = 0,
    354 	.max_fragment_atomic_counters = 8,
    355 	.max_combined_atomic_counters = 8,
    356 	.max_atomic_counter_bindings = 1,
    357 	.max_vertex_atomic_counter_buffers = 0,
    358 	.max_fragment_atomic_counter_buffers = 1,
    359 	.max_combined_atomic_counter_buffers = 1,
    360 	.max_atomic_counter_buffer_size = 16384,
    361 	.max_transform_feedback_buffers = 4,
    362 	.max_transform_feedback_interleaved_components = 64,
    363 	.max_cull_distances = 8,
    364 	.max_combined_clip_and_cull_distances = 8,
    365 	.max_samples = 4,
    366 	.max_mesh_output_vertices_ext = 256,
    367 	.max_mesh_output_primitives_ext = 256,
    368 	.max_mesh_work_group_size_x_ext = 128,
    369 	.max_mesh_work_group_size_y_ext = 128,
    370 	.max_mesh_work_group_size_z_ext = 128,
    371 	.max_task_work_group_size_x_ext = 128,
    372 	.max_task_work_group_size_y_ext = 128,
    373 	.max_task_work_group_size_z_ext = 128,
    374 	.max_mesh_view_count_ext = 4,
    375 	.max_dual_source_draw_buffers_ext = 1,
    376 
    377 	.limits = {
    378 		.non_inductive_for_loops                  = 1,
    379 		.while_loops                              = 1,
    380 		.do_while_loops                           = 1,
    381 		.general_uniform_indexing                 = 1,
    382 		.general_attribute_matrix_vector_indexing = 1,
    383 		.general_varying_indexing                 = 1,
    384 		.general_sampler_indexing                 = 1,
    385 		.general_variable_indexing                = 1,
    386 		.general_constant_matrix_vector_indexing  = 1,
    387 	},
    388 }};
    389 
    390 #if BEAMFORMER_RENDERDOC_HOOKS
    391 DEBUG_IMPORT void *
    392 vk_renderdoc_instance_handle(void)
    393 {
    394 	return *((void **)vulkan_context->handle);
    395 }
    396 #endif
    397 
    398 #if BEAMFORMER_DEBUG
    399 #define vk_label_object(k, h, label, extra) vk_label_object_(VK_OBJECT_TYPE_##k, (u64)h, label, extra)
    400 function void
    401 vk_label_object_(VkObjectType kind, u64 handle, str8 label, str8 extra)
    402 {
    403 	local_persist u8 buffer[1024];
    404 	Stream sb = stream_from_buffer(buffer, countof(buffer));
    405 	if (vulkan_config.instance.debug_utils && label.length > 0) {
    406 		stream_append_str8s(&sb, label, str8(" ("), extra, str8(")"));
    407 		stream_append_byte(&sb, 0);
    408 		if (!sb.errors) {
    409 			VkDebugUtilsObjectNameInfoEXT object_name_info = {
    410 				.sType        = VK_STRUCTURE_TYPE_DEBUG_UTILS_OBJECT_NAME_INFO_EXT,
    411 				.objectType   = kind,
    412 				.objectHandle = handle,
    413 				.pObjectName  = (char *)sb.data,
    414 			};
    415 			vkSetDebugUtilsObjectNameEXT(vulkan_context->device, &object_name_info);
    416 		}
    417 	}
    418 }
    419 #else
    420 #define vk_label_object(...)
    421 #define vk_label_object_(...)
    422 #endif
    423 
    424 function VulkanEntity *
    425 vk_entity_allocate(VulkanEntityKind kind)
    426 {
    427 	VulkanEntity *result = 0;
    428 	DeferLoop(take_lock(&vulkan_context->entity_lock, -1), release_lock(&vulkan_context->entity_lock))
    429 	{
    430 		result = SLLPopFreelist(vulkan_context->entity_freelist);
    431 		if (!result) result = push_struct_no_zero(vulkan_context->entity_arena, VulkanEntity);
    432 	}
    433 
    434 	zero_struct(result);
    435 	result->kind = kind;
    436 	return result;
    437 }
    438 
    439 function void
    440 vk_entity_release(VulkanEntity *entity)
    441 {
    442 	DeferLoop(take_lock(&vulkan_context->entity_lock, -1), release_lock(&vulkan_context->entity_lock))
    443 	{
    444 		SLLStackPush(vulkan_context->entity_freelist, entity, next);
    445 	}
    446 }
    447 
    448 function void *
    449 vk_entity_data(u64 handle, VulkanEntityKind kind)
    450 {
    451 	VulkanEntity *e = (VulkanEntity *)handle;
    452 	assert(handle && e->kind == kind);
    453 	return &e->as;
    454 }
    455 
    456 function VkCommandBuffer
    457 vk_command_buffer(GPUCommandList h)
    458 {
    459 	VulkanCommandBuffer *vcb = vk_entity_data(h.value, VulkanEntityKind_CommandBuffer);
    460 	VulkanCommandPool   *vcp = vulkan_context->command_pools[vcb->timeline];
    461 	VkCommandBuffer result = vcp->buffers[vcb->buffer_index];
    462 	return result;
    463 }
    464 
    465 #define glslang_log(a, ...) glslang_log_(a, arg_list(str8, __VA_ARGS__))
    466 function void
    467 glslang_log_(Arena *arena, str8 *items, u64 count)
    468 {
    469 	Stream sb = arena_stream(arena);
    470 	stream_append_str8(&sb, glslang_info(""));
    471 	stream_append_str8s_(&sb, items, count);
    472 	if (sb.data[sb.widx - 1] != '\n') stream_append_byte(&sb, '\n');
    473 	os_console_log(sb.data, sb.widx);
    474 }
    475 
    476 function str8
    477 glsl_to_spirv(Arena *arena, u32 kind, str8 shader_text, str8 name)
    478 {
    479 	/* NOTE(rnp): glslang's garbage c interface doesn't expose internal usage of strings with length */
    480 	assert(shader_text.data[shader_text.length] == 0);
    481 
    482 	glslang_input_t input = {
    483 		.language                          = GLSLANG_SOURCE_GLSL,
    484 		.stage                             = kind,
    485 		.client                            = GLSLANG_CLIENT_VULKAN,
    486 		.client_version                    = GLSLANG_TARGET_VULKAN_1_4,
    487 		.target_language                   = GLSLANG_TARGET_SPV,
    488 		.target_language_version           = GLSLANG_TARGET_SPV_1_6,
    489 		.code                              = (c8 *)shader_text.data,
    490 		.default_version                   = 460,
    491 		.default_profile                   = GLSLANG_NO_PROFILE,
    492 		.force_default_version_and_profile = 0,
    493 		.forward_compatible                = 0,
    494 		.messages                          = GLSLANG_MSG_DEFAULT_BIT,
    495 		.resource                          = glslc_resource_constraints,
    496 	};
    497 	glslang_shader_t *shader = glslang_shader_create(&input);
    498 
    499 	str8 error = {0};
    500 	if (glslang_shader_preprocess(shader, &input)) {
    501 		if (!glslang_shader_parse(shader, &input))
    502 			error = str8("parsing failed");
    503 	} else {
    504 		error = str8("preprocessing failed");
    505 	}
    506 
    507 	if (error.length) {
    508 		glslang_log(arena, name, str8(": "), error, str8("\n"),
    509 		            str8_from_c_str((c8 *)glslang_shader_get_info_log(shader)),
    510 		            str8_from_c_str((c8 *)glslang_shader_get_info_debug_log(shader)));
    511 		glslang_shader_delete(shader);
    512 		shader = 0;
    513 	}
    514 
    515 	str8 result = {0};
    516 	if (shader) {
    517 		glslang_program_t *program = glslang_program_create();
    518 		glslang_program_add_shader(program, shader);
    519 		i32 messages = GLSLANG_MSG_DEBUG_INFO_BIT|GLSLANG_MSG_SPV_RULES_BIT|GLSLANG_MSG_VULKAN_RULES_BIT;
    520 		if (glslang_program_link(program, messages)) {
    521 			glslang_spv_options_t options = {.validate = 1,};
    522 
    523 			if (vulkan_config.debug.shader_non_semantic_info &&
    524 			    vulkan_config.debug.shader_relaxed_extended_instruction)
    525 			{
    526 				options.generate_debug_info                  = 1;
    527 				options.emit_nonsemantic_shader_debug_info   = 1;
    528 				options.emit_nonsemantic_shader_debug_source = 1;
    529 			}
    530 
    531 			glslang_program_add_source_text(program, kind, (c8 *)shader_text.data, shader_text.length);
    532 			glslang_program_SPIRV_generate_with_options(program, kind, &options);
    533 
    534 			u32 words     = glslang_program_SPIRV_get_size(program);
    535 			result.data   = (u8 *)push_array(arena, u32, words);
    536 			result.length = words * sizeof(u32);
    537 			glslang_program_SPIRV_get(program, (u32 *)result.data);
    538 
    539 			str8 spirv_msg = str8_from_c_str((c8 *)glslang_program_SPIRV_get_messages(program));
    540 			if (spirv_msg.length) glslang_log(arena, name, str8(": spirv info: "), spirv_msg);
    541 		} else {
    542 			glslang_log(arena, name, str8(": shader linking failed\n"),
    543 			            str8_from_c_str((c8 *)glslang_program_get_info_log(program)),
    544 			            str8_from_c_str((c8 *)glslang_program_get_info_debug_log(program)));
    545 		}
    546 		glslang_shader_delete(shader);
    547 		glslang_program_delete(program);
    548 	}
    549 
    550 	return result;
    551 }
    552 
    553 function u32
    554 vk_shader_kind_to_glslang_shader_kind(u32 kind)
    555 {
    556 	u32 result = ctz_u64(kind);
    557 	return result;
    558 }
    559 
    560 function VkShaderModule
    561 vk_compile_shader_module(Arena *arena, u32 kind, str8 text, str8 name)
    562 {
    563 	VkShaderModule result = {0};
    564 	str8 spirv = glsl_to_spirv(arena, vk_shader_kind_to_glslang_shader_kind(kind), text, name);
    565 	VkShaderModuleCreateInfo create_info = {
    566 		.sType    = VK_STRUCTURE_TYPE_SHADER_MODULE_CREATE_INFO,
    567 		.codeSize = (u64)spirv.length,
    568 		.pCode    = (u32 *)spirv.data,
    569 	};
    570 	if (spirv.length > 0) vkCreateShaderModule(vulkan_context->device, &create_info, 0, &result);
    571 
    572 	return result;
    573 }
    574 
    575 function VkShaderStageFlags
    576 vk_stage_flags_from_shader_kind(VulkanShaderKind kind)
    577 {
    578 	read_only local_persist VkShaderStageFlags map[VulkanShaderKind_Count + 1] = {
    579 		[VulkanShaderKind_Vertex]   = VK_SHADER_STAGE_VERTEX_BIT,
    580 		[VulkanShaderKind_Mesh]     = VK_SHADER_STAGE_MESH_BIT_EXT,
    581 		[VulkanShaderKind_Fragment] = VK_SHADER_STAGE_FRAGMENT_BIT,
    582 		[VulkanShaderKind_Compute]  = VK_SHADER_STAGE_COMPUTE_BIT,
    583 		[VulkanShaderKind_Count]    = 0,
    584 	};
    585 	VkShaderStageFlags result = map[Clamp((u32)kind, 0, VulkanShaderKind_Count)];
    586 	return result;
    587 }
    588 
    589 function VkSpecializationMapEntry *
    590 vk_specialization_map_from_struct_id(Arena *arena, i32 struct_id)
    591 {
    592 	assert(struct_id >= 0);
    593 	MetaStructInfo   *si = meta_struct_info_by_id + struct_id;
    594 	MetaStructMember *sm = meta_struct_members_by_id[struct_id];
    595 	VkSpecializationMapEntry *result = push_array(arena, VkSpecializationMapEntry, si->member_count);
    596 	for EachIndex(si->member_count, it) {
    597 		result[it].constantID = it;
    598 		result[it].offset     = sm[it].offset;
    599 		result[it].size       = meta_kind_byte_sizes[sm[it].type_id];
    600 	}
    601 	return result;
    602 }
    603 
    604 function VulkanPipeline
    605 vk_compute_pipeline_from_info(Arena *arena, VulkanPipelineCreateInfo *info, u32 push_constants_size)
    606 {
    607 	VulkanPipeline result = {.stage_flags = VK_SHADER_STAGE_COMPUTE_BIT};
    608 	VkShaderModule module = vk_compile_shader_module(arena, VK_SHADER_STAGE_COMPUTE_BIT, info->text, info->name);
    609 	if (module) {
    610 		VkPushConstantRange push_constant_range = {
    611 			.stageFlags = VK_SHADER_STAGE_COMPUTE_BIT,
    612 			.offset     = 0,
    613 			.size       = push_constants_size,
    614 		};
    615 
    616 		VkPipelineLayoutCreateInfo pipeline_layout_create_info = {
    617 			.sType = VK_STRUCTURE_TYPE_PIPELINE_LAYOUT_CREATE_INFO,
    618 			.pushConstantRangeCount = push_constants_size ? 1 : 0,
    619 			.pPushConstantRanges    = push_constants_size ? &push_constant_range : 0,
    620 		};
    621 
    622 		vkCreatePipelineLayout(vulkan_context->device, &pipeline_layout_create_info, 0, &result.layout);
    623 
    624 		VkComputePipelineCreateInfo pipeline_create_info = {
    625 			.sType  = VK_STRUCTURE_TYPE_COMPUTE_PIPELINE_CREATE_INFO,
    626 			.layout = result.layout,
    627 			.stage  = {
    628 				.sType  = VK_STRUCTURE_TYPE_PIPELINE_SHADER_STAGE_CREATE_INFO,
    629 				.stage  = VK_SHADER_STAGE_COMPUTE_BIT,
    630 				.module = module,
    631 				.pName  = "main",
    632 			},
    633 		};
    634 
    635 		VkSpecializationInfo specialization_info = {0};
    636 		if (info->specialization_data && info->specialization_struct_id >= 0) {
    637 			MetaStructInfo *si = meta_struct_info_by_id + info->specialization_struct_id;
    638 			pipeline_create_info.stage.pSpecializationInfo = &specialization_info;
    639 			specialization_info.pMapEntries   = vk_specialization_map_from_struct_id(arena, info->specialization_struct_id);
    640 			specialization_info.mapEntryCount = si->member_count;
    641 			specialization_info.dataSize      = si->size;
    642 			specialization_info.pData         = info->specialization_data;
    643 		}
    644 
    645 		vkCreateComputePipelines(vulkan_context->device, 0, 1, &pipeline_create_info, 0, &result.pipeline);
    646 
    647 		vk_label_object(PIPELINE,        result.pipeline, info->name, str8("Pipeline"));
    648 		vk_label_object(PIPELINE_LAYOUT, result.layout,   info->name, str8("Pipeline Layout"));
    649 		vk_label_object(SHADER_MODULE,   module,          info->name, str8("Module"));
    650 
    651 		vkDestroyShaderModule(vulkan_context->device, module, 0);
    652 	}
    653 	if (result.pipeline == 0) result = vulkan_context->default_compute_pipeline;
    654 
    655 	return result;
    656 }
    657 
    658 function VulkanPipeline
    659 vk_graphics_pipeline_from_infos(Arena *arena, VulkanPipelineCreateInfo *infos, u32 count, u32 push_constants_size)
    660 {
    661 	assume(count == 2);
    662 
    663 	VulkanPipeline result = {0};
    664 	VkShaderModule modules[2];
    665 
    666 	modules[0] = vk_compile_shader_module(arena, vk_stage_flags_from_shader_kind(infos[0].kind),
    667 	                                      infos[0].text, infos[0].name);
    668 	modules[1] = vk_compile_shader_module(arena, vk_stage_flags_from_shader_kind(infos[1].kind),
    669 	                                      infos[1].text, infos[1].name);
    670 	if (modules[0] && modules[1]) {
    671 		result.stage_flags = vk_stage_flags_from_shader_kind(infos[0].kind)
    672 		                     | vk_stage_flags_from_shader_kind(infos[1].kind);
    673 
    674 		VkPushConstantRange pcr = {
    675 			.stageFlags = result.stage_flags,
    676 			.offset     = 0,
    677 			.size       = push_constants_size,
    678 		};
    679 
    680 		VkPipelineLayoutCreateInfo pipeline_layout_info = {
    681 			.sType = VK_STRUCTURE_TYPE_PIPELINE_LAYOUT_CREATE_INFO,
    682 			.pushConstantRangeCount = push_constants_size ? 1    : 0,
    683 			.pPushConstantRanges    = push_constants_size ? &pcr : 0,
    684 		};
    685 
    686 		vkCreatePipelineLayout(vulkan_context->device, &pipeline_layout_info, 0, &result.layout);
    687 
    688 		VkPipelineShaderStageCreateInfo shader_stage_create_infos[2] = {
    689 			{
    690 				.sType  = VK_STRUCTURE_TYPE_PIPELINE_SHADER_STAGE_CREATE_INFO,
    691 				.stage  = vk_stage_flags_from_shader_kind(infos[0].kind),
    692 				.module = modules[0],
    693 				.pName  = "main",
    694 			},
    695 			{
    696 				.sType  = VK_STRUCTURE_TYPE_PIPELINE_SHADER_STAGE_CREATE_INFO,
    697 				.stage  = vk_stage_flags_from_shader_kind(infos[1].kind),
    698 				.module = modules[1],
    699 				.pName  = "main",
    700 			},
    701 		};
    702 
    703 		VkPipelineVertexInputStateCreateInfo vertex_input_info = {
    704 			.sType = VK_STRUCTURE_TYPE_PIPELINE_VERTEX_INPUT_STATE_CREATE_INFO,
    705 		};
    706 
    707 		VkPipelineInputAssemblyStateCreateInfo input_assembly_info = {
    708 			.sType    = VK_STRUCTURE_TYPE_PIPELINE_INPUT_ASSEMBLY_STATE_CREATE_INFO,
    709 			.topology = VK_PRIMITIVE_TOPOLOGY_TRIANGLE_LIST,
    710 		};
    711 
    712 		VkPipelineViewportStateCreateInfo viewport_info = {
    713 			.sType         = VK_STRUCTURE_TYPE_PIPELINE_VIEWPORT_STATE_CREATE_INFO,
    714 			.viewportCount = 1,
    715 			.scissorCount  = 1,
    716 		};
    717 
    718 		VkPipelineRasterizationStateCreateInfo rasterization_info = {
    719 			.sType       = VK_STRUCTURE_TYPE_PIPELINE_RASTERIZATION_STATE_CREATE_INFO,
    720 			.polygonMode = VK_POLYGON_MODE_FILL,
    721 			.lineWidth   = 1.0f,
    722 			.cullMode    = VK_CULL_MODE_BACK_BIT,
    723 			.frontFace   = VK_FRONT_FACE_CLOCKWISE,
    724 		};
    725 
    726 		VkPipelineMultisampleStateCreateInfo multisampling_info = {
    727 			.sType                = VK_STRUCTURE_TYPE_PIPELINE_MULTISAMPLE_STATE_CREATE_INFO,
    728 			.rasterizationSamples = vulkan_context->gpu_info.max_msaa_samples,
    729 		};
    730 
    731 		VkPipelineDepthStencilStateCreateInfo depth_test_create_info = {
    732 			.sType = VK_STRUCTURE_TYPE_PIPELINE_DEPTH_STENCIL_STATE_CREATE_INFO,
    733 			.depthTestEnable       = 1,
    734 			.depthWriteEnable      = 1,
    735 			.depthCompareOp        = VK_COMPARE_OP_LESS,
    736 			.depthBoundsTestEnable = 1,
    737 			.stencilTestEnable     = 0,
    738 			.front                 = {0},
    739 			.back                  = {0},
    740 			.minDepthBounds        = 0.0f,
    741 			.maxDepthBounds        = 1.0f,
    742 		};
    743 
    744 		u32 colour_mask = VK_COLOR_COMPONENT_R_BIT|VK_COLOR_COMPONENT_G_BIT|VK_COLOR_COMPONENT_B_BIT|VK_COLOR_COMPONENT_A_BIT;
    745 		VkPipelineColorBlendAttachmentState blend_state = {
    746 			.colorWriteMask      = colour_mask,
    747 			.blendEnable         = 1,
    748 			.srcColorBlendFactor = VK_BLEND_FACTOR_SRC_ALPHA,
    749 			.dstColorBlendFactor = VK_BLEND_FACTOR_ONE_MINUS_SRC_ALPHA,
    750 			.colorBlendOp        = VK_BLEND_OP_ADD,
    751 			.srcAlphaBlendFactor = VK_BLEND_FACTOR_ONE,
    752 			.dstAlphaBlendFactor = VK_BLEND_FACTOR_ZERO,
    753 			.alphaBlendOp        = VK_BLEND_OP_ADD,
    754 		};
    755 
    756 		VkPipelineColorBlendStateCreateInfo colour_blend_state_create = {
    757 			.sType           = VK_STRUCTURE_TYPE_PIPELINE_COLOR_BLEND_STATE_CREATE_INFO,
    758 			.logicOpEnable   = 0,
    759 			.logicOp         = VK_LOGIC_OP_COPY,
    760 			.attachmentCount = 1,
    761 			.pAttachments    = &blend_state,
    762 		};
    763 
    764 		VkDynamicState dynamic_states[] = {
    765 			VK_DYNAMIC_STATE_VIEWPORT,
    766 			VK_DYNAMIC_STATE_SCISSOR,
    767 		};
    768 
    769 		VkPipelineDynamicStateCreateInfo dynamic_state_info = {
    770 			.sType             = VK_STRUCTURE_TYPE_PIPELINE_DYNAMIC_STATE_CREATE_INFO,
    771 			.dynamicStateCount = countof(dynamic_states),
    772 			.pDynamicStates    = dynamic_states,
    773 		};
    774 
    775 		//VkFormat colour_attachment_format = VK_FORMAT_R8G8B8A8_SRGB;
    776 		VkFormat colour_attachment_format = VK_FORMAT_R8G8B8A8_UNORM;
    777 		VkPipelineRenderingCreateInfo rendering_create_info = {
    778 			.sType                   = VK_STRUCTURE_TYPE_PIPELINE_RENDERING_CREATE_INFO,
    779 			.colorAttachmentCount    = 1,
    780 			.pColorAttachmentFormats = &colour_attachment_format,
    781 			.depthAttachmentFormat   = vulkan_context->depth_stencil_format,
    782 			.stencilAttachmentFormat = vulkan_context->depth_stencil_format,
    783 		};
    784 
    785 		VkGraphicsPipelineCreateInfo pci = {
    786 			.sType               = VK_STRUCTURE_TYPE_GRAPHICS_PIPELINE_CREATE_INFO,
    787 			.pNext               = &rendering_create_info,
    788 			.stageCount          = countof(shader_stage_create_infos),
    789 			.pStages             = shader_stage_create_infos,
    790 			.pVertexInputState   = &vertex_input_info,
    791 			.pInputAssemblyState = &input_assembly_info,
    792 			.pViewportState      = &viewport_info,
    793 			.pRasterizationState = &rasterization_info,
    794 			.pMultisampleState   = &multisampling_info,
    795 			.pDepthStencilState  = &depth_test_create_info,
    796 			.pColorBlendState    = &colour_blend_state_create,
    797 			.pDynamicState       = &dynamic_state_info,
    798 			.layout              = result.layout,
    799 		};
    800 
    801 		vkCreateGraphicsPipelines(vulkan_context->device, 0, 1, &pci,0, &result.pipeline);
    802 
    803 		str8 extras[] = {
    804 			[VulkanShaderKind_Vertex]   = str8_comp("Vertex Module"),
    805 			[VulkanShaderKind_Mesh]     = str8_comp("Mesh Module"),
    806 			[VulkanShaderKind_Fragment] = str8_comp("Fragment Module"),
    807 		};
    808 		assert(infos[0].kind < countof(extras));
    809 		assert(infos[1].kind < countof(extras));
    810 
    811 		vk_label_object(PIPELINE,        result.pipeline, infos[0].name, str8("Pipeline"));
    812 		vk_label_object(PIPELINE_LAYOUT, result.layout,   infos[0].name, str8("Pipeline Layout"));
    813 		//vk_label_object_(VK_OBJECT_TYPE_SHADER_MODULE, (u64)modules[0], infos[0].name, extras[infos[0].kind]);
    814 		//vk_label_object_(VK_OBJECT_TYPE_SHADER_MODULE, (u64)modules[1], infos[1].name, extras[infos[1].kind]);
    815 	}
    816 
    817 	if (modules[0]) vkDestroyShaderModule(vulkan_context->device, modules[0], 0);
    818 	if (modules[1]) vkDestroyShaderModule(vulkan_context->device, modules[1], 0);
    819 
    820 	if (result.pipeline == 0) result = vulkan_context->default_graphics_pipeline;
    821 
    822 	return result;
    823 }
    824 
    825 function VulkanSemaphore
    826 vk_make_semaphore(OSHandle *export)
    827 {
    828 	VulkanContext *vk = vulkan_context;
    829 
    830 	VkSemaphoreCreateInfo       sci  = {.sType = VK_STRUCTURE_TYPE_SEMAPHORE_CREATE_INFO};
    831 	VkExportSemaphoreCreateInfo esci = {
    832 		.sType       = VK_STRUCTURE_TYPE_EXPORT_SEMAPHORE_CREATE_INFO,
    833 		.handleTypes = OS_WINDOWS ? VK_EXTERNAL_SEMAPHORE_HANDLE_TYPE_OPAQUE_WIN32_BIT
    834 		                          : VK_EXTERNAL_SEMAPHORE_HANDLE_TYPE_OPAQUE_FD_BIT,
    835 	};
    836 	VkSemaphoreTypeCreateInfo stc = {
    837 		.sType         = VK_STRUCTURE_TYPE_SEMAPHORE_TYPE_CREATE_INFO,
    838 		.semaphoreType = VK_SEMAPHORE_TYPE_TIMELINE,
    839 	};
    840 
    841 	if (export) sci.pNext = &esci;
    842 	else        sci.pNext = &stc;
    843 
    844 	VulkanSemaphore result = {0};
    845 
    846 	vkCreateSemaphore(vk->device, &sci, 0, &result.semaphore);
    847 
    848 	if (export) {
    849 		if (OS_WINDOWS) {
    850 			VkSemaphoreGetWin32HandleInfoKHR ghi = {
    851 				.sType      = VK_STRUCTURE_TYPE_SEMAPHORE_GET_WIN32_HANDLE_INFO_KHR,
    852 				.handleType = VK_EXTERNAL_SEMAPHORE_HANDLE_TYPE_OPAQUE_WIN32_BIT,
    853 				.semaphore  = result.semaphore,
    854 			};
    855 			void *handle;
    856 			vkGetSemaphoreWin32HandleKHR(vk->device, &ghi, &handle);
    857 			export->value[0] = (u64)handle;
    858 		} else {
    859 			VkSemaphoreGetFdInfoKHR ghi = {
    860 				.sType      = VK_STRUCTURE_TYPE_SEMAPHORE_GET_FD_INFO_KHR,
    861 				.handleType = VK_EXTERNAL_SEMAPHORE_HANDLE_TYPE_OPAQUE_FD_BIT,
    862 				.semaphore  = result.semaphore,
    863 			};
    864 			i32 handle;
    865 			vkGetSemaphoreFdKHR(vk->device, &ghi, &handle);
    866 			export->value[0] = (u64)handle;
    867 		}
    868 	}
    869 
    870 	return result;
    871 }
    872 
    873 function void
    874 vk_release_memory(VkDeviceMemory memory, u64 size)
    875 {
    876 	VulkanContext *vk = vulkan_context;
    877 	vkFreeMemory(vk->device, memory, 0);
    878 	atomic_add_u64(&vk->gpu_info.gpu_heap_used, -size);
    879 }
    880 
    881 function b32
    882 vk_allocate_memory(VkDeviceMemory *memory, u64 size, VulkanMemoryKind kind, VkMemoryAllocateFlags flags,
    883                    VkMemoryDedicatedAllocateInfo *dedicated_allocate_info, OSHandle *export)
    884 {
    885 	VulkanContext *vk = vulkan_context;
    886 
    887 	VkExportMemoryAllocateInfo export_info = {
    888 		.sType       = VK_STRUCTURE_TYPE_EXPORT_MEMORY_ALLOCATE_INFO,
    889 		.handleTypes = OS_WINDOWS ? VK_EXTERNAL_MEMORY_HANDLE_TYPE_OPAQUE_WIN32_BIT
    890 		                          : VK_EXTERNAL_MEMORY_HANDLE_TYPE_OPAQUE_FD_BIT,
    891 	};
    892 
    893 	VkMemoryAllocateFlagsInfo memory_allocate_flags_info = {
    894 		.sType = VK_STRUCTURE_TYPE_MEMORY_ALLOCATE_FLAGS_INFO,
    895 		.flags = flags,
    896 		.pNext = dedicated_allocate_info,
    897 	};
    898 
    899 	if (export) {
    900 		export_info.pNext = dedicated_allocate_info;
    901 		memory_allocate_flags_info.pNext = &export_info;
    902 	}
    903 
    904 	VkMemoryAllocateInfo memory_allocate_info = {
    905 		.sType           = VK_STRUCTURE_TYPE_MEMORY_ALLOCATE_INFO,
    906 		.allocationSize  = size,
    907 		.memoryTypeIndex = vk->memory_info.memory_type_indices[kind],
    908 		.pNext           = &memory_allocate_flags_info,
    909 	};
    910 
    911 	b32 result = vkAllocateMemory(vk->device, &memory_allocate_info, 0, memory) == VK_SUCCESS;
    912 	if (result) {
    913 		atomic_add_u64(&vk->gpu_info.gpu_heap_used, memory_allocate_info.allocationSize);
    914 
    915 		if (export) {
    916 			if (OS_WINDOWS) {
    917 				VkMemoryGetWin32HandleInfoKHR handle_info = {
    918 					.sType      = VK_STRUCTURE_TYPE_MEMORY_GET_WIN32_HANDLE_INFO_KHR,
    919 					.memory     = *memory,
    920 					.handleType = VK_EXTERNAL_MEMORY_HANDLE_TYPE_OPAQUE_WIN32_BIT,
    921 				};
    922 				void *handle;
    923 				vkGetMemoryWin32HandleKHR(vk->device, &handle_info, &handle);
    924 				export->value[0] = (u64)handle;
    925 			} else {
    926 				VkMemoryGetFdInfoKHR fd_info = {
    927 					.sType      = VK_STRUCTURE_TYPE_MEMORY_GET_FD_INFO_KHR,
    928 					.memory     = *memory,
    929 					.handleType = VK_EXTERNAL_MEMORY_HANDLE_TYPE_OPAQUE_FD_BIT,
    930 				};
    931 				i32 fd;
    932 				vkGetMemoryFdKHR(vk->device, &fd_info, &fd);
    933 				export->value[0] = (u64)fd;
    934 			}
    935 		}
    936 	}
    937 	return result;
    938 }
    939 
    940 function u32
    941 vk_index_size(VkIndexType type)
    942 {
    943 	u32 result = 0;
    944 	switch (type) {
    945 	case VK_INDEX_TYPE_UINT16:{ result = 2; }break;
    946 	case VK_INDEX_TYPE_UINT32:{ result = 4; }break;
    947 	InvalidDefaultCase;
    948 	}
    949 	return result;
    950 }
    951 
    952 typedef struct {
    953 	GPUBuffer        *gpu_buffer;
    954 	u64               size;
    955 	VulkanUsageFlags  flags;
    956 	u32               queue_family_count;
    957 	u32               queue_family_indices[GPUTimeline_Count];
    958 	VkIndexType       index_type;
    959 	OSHandle         *export;
    960 	str8              label;
    961 } VulkanBufferAllocateInfo;
    962 
    963 function b32
    964 vk_buffer_allocate_common(VulkanBuffer *vb, VulkanBufferAllocateInfo *ai)
    965 {
    966 	VulkanContext *vk = vulkan_context;
    967 
    968 	// TODO(rnp): this probably should be handled, its usually 4GB. likely
    969 	// need to chain multiple allocations and handle it in shader code
    970 	u64 clamp_size = vk->memory_info.max_allocation_size & ~(vk->memory_info.non_coherent_atom_size - 1);
    971 
    972 	// NOTE(rnp): renderdoc can't handle buffers that are too close to the allocation size limit
    973 	if (renderdoc_attached())
    974 		clamp_size -= MB(8);
    975 
    976 	u64 size = Min(ai->size, clamp_size);
    977 
    978 	VkBufferCreateInfo buffer_create_info = {
    979 		.sType       = VK_STRUCTURE_TYPE_BUFFER_CREATE_INFO,
    980 		.usage       = VK_BUFFER_USAGE_SHADER_DEVICE_ADDRESS_BIT|VK_BUFFER_USAGE_STORAGE_BUFFER_BIT,
    981 		.size        = size,
    982 		.sharingMode = ai->queue_family_count > 1 ? VK_SHARING_MODE_CONCURRENT : VK_SHARING_MODE_EXCLUSIVE,
    983 		.queueFamilyIndexCount = ai->queue_family_count,
    984 		.pQueueFamilyIndices   = ai->queue_family_indices,
    985 	};
    986 
    987 	if (ai->flags & VulkanUsageFlag_TransferSource)
    988 		buffer_create_info.usage |= VK_BUFFER_USAGE_TRANSFER_SRC_BIT;
    989 
    990 	if (ai->flags & VulkanUsageFlag_TransferDestination)
    991 		buffer_create_info.usage |= VK_BUFFER_USAGE_TRANSFER_DST_BIT;
    992 
    993 	if (ai->index_type != VK_INDEX_TYPE_NONE_KHR)
    994 		buffer_create_info.usage |= VK_BUFFER_USAGE_INDEX_BUFFER_BIT;
    995 
    996 	VkExternalMemoryBufferCreateInfo external_memory_buffer_create_info = {
    997 		.sType       = VK_STRUCTURE_TYPE_EXTERNAL_MEMORY_BUFFER_CREATE_INFO,
    998 		.handleTypes = OS_WINDOWS ? VK_EXTERNAL_MEMORY_HANDLE_TYPE_OPAQUE_WIN32_BIT
    999 		                          : VK_EXTERNAL_MEMORY_HANDLE_TYPE_OPAQUE_FD_BIT,
   1000 	};
   1001 
   1002 	if (ai->export) buffer_create_info.pNext = &external_memory_buffer_create_info;
   1003 
   1004 	vkCreateBuffer(vk->device, &buffer_create_info, 0, &vb->buffer);
   1005 	vk_label_object(BUFFER, vb->buffer, ai->label, str8("Buffer"));
   1006 
   1007 	VkMemoryRequirements memory_requirements;
   1008 	vkGetBufferMemoryRequirements(vk->device, vb->buffer, &memory_requirements);
   1009 
   1010 	assert((u64)size <= memory_requirements.size);
   1011 	size = memory_requirements.size;
   1012 
   1013 	VkMemoryDedicatedAllocateInfo dedicated_allocate_info = {
   1014 		.sType  = VK_STRUCTURE_TYPE_MEMORY_DEDICATED_ALLOCATE_INFO,
   1015 		.buffer = vb->buffer,
   1016 	};
   1017 
   1018 	/* NOTE(rnp): to create a CPU writable buffer:
   1019 	 * 1. try to allocate and map the entire buffer
   1020 	 *    - this may fail if the buffer is bigger than the BAR size
   1021 	 *      (unknowable from vulkan), or the memory space has become
   1022 	 *      too fragmented (unlikely)
   1023 	 * 2. if allocation or mapping fails we must chain a host buffer
   1024 	 *    for staging. If this happens in practice we should add
   1025 	 *    the ability to import an existing external allocation
   1026 	 */
   1027 	b32 host_read_write = (ai->flags & VulkanUsageFlag_HostReadWrite) != 0;
   1028 	vb->memory_kind = host_read_write ? VulkanMemoryKind_BAR : VulkanMemoryKind_Device;
   1029 
   1030 	b32 result = 0;
   1031 	// TODO(rnp): this may fail if the allocation is too big for the BAR size
   1032 	// it needs to handled properly
   1033 	if (vk_allocate_memory(&vb->memory, size, vb->memory_kind, VK_MEMORY_ALLOCATE_DEVICE_ADDRESS_BIT, &dedicated_allocate_info, ai->export)) {
   1034 		result  = 1;
   1035 		ai->gpu_buffer->size = size;
   1036 		vb->memory_size = size;
   1037 
   1038 		vb->index_type = ai->index_type;
   1039 
   1040 		vk_label_object(DEVICE_MEMORY, vb->memory, ai->label, str8("Memory"));
   1041 
   1042 		if (host_read_write)
   1043 			vkMapMemory(vk->device, vb->memory, 0, size, 0, &vb->host_pointer);
   1044 
   1045 		vkBindBufferMemory(vk->device, vb->buffer, vb->memory, 0);
   1046 		VkBufferDeviceAddressInfo buffer_device_address_info = {
   1047 			.sType  = VK_STRUCTURE_TYPE_BUFFER_DEVICE_ADDRESS_INFO,
   1048 			.buffer = vb->buffer,
   1049 		};
   1050 		ai->gpu_buffer->gpu_pointer = vkGetBufferDeviceAddress(vk->device, &buffer_device_address_info);
   1051 	}
   1052 	return result;
   1053 }
   1054 
   1055 function void
   1056 vk_load_instance(Arena *arena, Stream *err)
   1057 {
   1058 	Temp scratch = temp_begin(arena);
   1059 	#define X(name, ...) name = (name##_fn *)vkGetInstanceProcAddr(0, #name);
   1060 	VkBaseProcedureList
   1061 	#undef X
   1062 
   1063 	u32 enabled_validation_layers_count = 0;
   1064 	const char *enabled_validation_layers[countof(vk_validation_layers)];
   1065 
   1066 	u32 enabled_instance_extensions_count = 0;
   1067 	const char *enabled_instance_extensions[countof(vk_required_instance_extensions) + countof(vk_instance_debug_extensions)];
   1068 
   1069 	static_assert(countof(vk_required_instance_extensions) == 0, "");
   1070 	//for EachElement(vk_required_instance_extensions, it)
   1071 	//	enabled_instance_extensions[enabled_instance_extensions_count++] = vk_required_instance_extensions[it];
   1072 
   1073 	#if BEAMFORMER_DEBUG
   1074 	{
   1075 		u32 layer_count = 0;
   1076 		vkEnumerateInstanceLayerProperties(&layer_count, 0);
   1077 
   1078 		VkLayerProperties *layers      = push_array(arena, VkLayerProperties, layer_count);
   1079 		str8              *layer_str8s = push_array(arena, str8,              layer_count);
   1080 		vkEnumerateInstanceLayerProperties(&layer_count, layers);
   1081 
   1082 		for (u32 i = 0; i < layer_count; i++)
   1083 			layer_str8s[i] = str8_from_c_str(layers[i].layerName);
   1084 
   1085 		for EachElement(vk_validation_layers, it) {
   1086 			for(u32 i = 0; i < layer_count; i++) {
   1087 				if (str8_equal(vk_validation_layers[it], layer_str8s[i])) {
   1088 					u32 index = enabled_validation_layers_count++;
   1089 					enabled_validation_layers[index]   = (char *)vk_validation_layers[it].data;
   1090 					vulkan_config.layers.enabled.E[it] = 1;
   1091 					vulkan_config.layers.version.E[it] = layers[i].specVersion;
   1092 					break;
   1093 				}
   1094 			}
   1095 		}
   1096 
   1097 		if (countof(vk_validation_layers) != enabled_validation_layers_count) {
   1098 			i32 missing_count = countof(vk_validation_layers) - enabled_validation_layers_count;
   1099 			stream_append_str8s(err, vulkan_info("missing validation layer"),
   1100 			                    missing_count > 1 ? str8("s:") : str8(":"), str8("\n"));
   1101 
   1102 			for EachElement(vk_validation_layers, it)
   1103 				if (vulkan_config.layers.enabled.E[it] == 0)
   1104 					stream_append_str8s(err, str8("    "), vk_validation_layers[it], str8("\n"));
   1105 		}
   1106 
   1107 		u32 instance_extension_count = 0;
   1108 		vkEnumerateInstanceExtensionProperties(0, &instance_extension_count, 0);
   1109 
   1110 		VkExtensionProperties *instance_extensions = push_array(arena, VkExtensionProperties, instance_extension_count);
   1111 		str8                  *instance_ext_str8s  = push_array(arena, str8,                  instance_extension_count);
   1112 		vkEnumerateInstanceExtensionProperties(0, &instance_extension_count, instance_extensions);
   1113 		for EachIndex(instance_extension_count, it)
   1114 			instance_ext_str8s[it] = str8_from_c_str(instance_extensions[it].extensionName);
   1115 
   1116 		for EachElement(vk_instance_debug_extensions, it) {
   1117 			for EachIndex(instance_extension_count, i) {
   1118 				if (str8_equal(vk_instance_debug_extensions[it], instance_ext_str8s[i])) {
   1119 					u32 index = enabled_instance_extensions_count++;
   1120 					enabled_instance_extensions[index] = (char *)vk_instance_debug_extensions[it].data;
   1121 					vulkan_config.instance.E[it] = 1;
   1122 					break;
   1123 				}
   1124 			}
   1125 		}
   1126 	}
   1127 	#endif
   1128 
   1129 	VkApplicationInfo app_info = {
   1130 		.sType              = VK_STRUCTURE_TYPE_APPLICATION_INFO,
   1131 		.pApplicationName   = BEAMFORMER_NAME_STRING,
   1132 		.applicationVersion = 0,
   1133 		.pEngineName        = "No Engine",
   1134 		.engineVersion      = 0,
   1135 		.apiVersion         = VK_MAKE_API_VERSION(1, 3, 0, 0),
   1136 	};
   1137 
   1138 	VkInstanceCreateInfo instance_create_info = {
   1139 		.sType                   = VK_STRUCTURE_TYPE_INSTANCE_CREATE_INFO,
   1140 		.pApplicationInfo        = &app_info,
   1141 		.ppEnabledExtensionNames = enabled_instance_extensions,
   1142 		.enabledExtensionCount   = enabled_instance_extensions_count,
   1143 		.ppEnabledLayerNames     = enabled_validation_layers,
   1144 		.enabledLayerCount       = enabled_validation_layers_count,
   1145 	};
   1146 
   1147 	#if 0 && BEAMFORMER_DEBUG
   1148 	VkValidationFeatureEnableEXT validation_feature_enables[] = {
   1149 		VK_VALIDATION_FEATURE_ENABLE_GPU_ASSISTED_EXT,
   1150 		VK_VALIDATION_FEATURE_ENABLE_BEST_PRACTICES_EXT,
   1151 		VK_VALIDATION_FEATURE_ENABLE_DEBUG_PRINTF_EXT,
   1152 		VK_VALIDATION_FEATURE_ENABLE_SYNCHRONIZATION_VALIDATION_EXT,
   1153 	};
   1154 
   1155 	VkValidationFeaturesEXT validation_features = {
   1156 		.sType                         = VK_STRUCTURE_TYPE_VALIDATION_FEATURES_EXT,
   1157 		.enabledValidationFeatureCount = countof(validation_feature_enables),
   1158 		.pEnabledValidationFeatures    = validation_feature_enables,
   1159 	};
   1160 
   1161 	instance_create_info.pNext = &validation_features;
   1162 	#endif
   1163 
   1164 	vkCreateInstance(&instance_create_info, 0, &vulkan_context->handle);
   1165 
   1166 	#define X(name, ...) name = (name##_fn *)vkGetInstanceProcAddr(vulkan_context->handle, #name);
   1167 	VkInstanceProcedureList
   1168 	#undef X
   1169 	temp_end(scratch);
   1170 }
   1171 
   1172 function void
   1173 vk_load_physical_device(Arena *arena, Stream *err)
   1174 {
   1175 	Temp scratch = temp_begin(arena);
   1176 	VulkanContext *vk = vulkan_context;
   1177 
   1178 	u32 device_count;
   1179 	vkEnumeratePhysicalDevices(vk->handle, &device_count, 0);
   1180 
   1181 	VkPhysicalDevice *devices = push_array(arena, typeof(*devices), device_count);
   1182 	vkEnumeratePhysicalDevices(vk->handle, &device_count, devices);
   1183 
   1184 	i32 best_index = -1, best_score = -1;
   1185 	for (u32 i = 0; i < device_count; i++) {
   1186 		VkPhysicalDeviceProperties2 *dp = push_struct(arena, typeof(*dp));
   1187 		dp->sType = VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_PROPERTIES_2;
   1188 		vkGetPhysicalDeviceProperties2(devices[i], dp);
   1189 
   1190 		i32 score = 0;
   1191 		if (dp->properties.deviceType == VK_PHYSICAL_DEVICE_TYPE_DISCRETE_GPU)
   1192 			score++;
   1193 
   1194 		if (score > best_score) {
   1195 			best_score = score;
   1196 			best_index = (i32)i;
   1197 		}
   1198 	}
   1199 
   1200 	vk->physical_device = best_index >= 0 ? devices[best_index] : 0;
   1201 	if (!vk->physical_device)
   1202 		fatal(vulkan_info("failed to find a suitable GPU\n"));
   1203 
   1204 	VkPhysicalDeviceProperties2        dp   = {.sType = VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_PROPERTIES_2};
   1205 	VkPhysicalDeviceVulkan11Properties v11p = {.sType = VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_VULKAN_1_1_PROPERTIES};
   1206 	dp.pNext = &v11p;
   1207 
   1208 	vkGetPhysicalDeviceProperties2(vk->physical_device, &dp);
   1209 
   1210 	stream_append_str8s(err, vulkan_info("selecting device: "), str8_from_c_str(dp.properties.deviceName), str8("\n"));
   1211 	stream_append_str8(err, vulkan_info("Vulkan Version: "));
   1212 	{
   1213 		u32 dv = dp.properties.apiVersion;
   1214 		stream_appendf(err, "%u.%u.%u\n", VK_API_VERSION_MAJOR(dv), VK_API_VERSION_MINOR(dv), VK_API_VERSION_PATCH(dv));
   1215 	}
   1216 
   1217 	{
   1218 		u32 extension_count = 0;
   1219 		vkEnumerateDeviceExtensionProperties(vk->physical_device, 0, &extension_count, 0);
   1220 		VkExtensionProperties *extensions = push_array(arena, VkExtensionProperties, extension_count);
   1221 		vkEnumerateDeviceExtensionProperties(vk->physical_device, 0, &extension_count, extensions);
   1222 
   1223 		str8 *ext_str8s = push_array(arena, str8, extension_count);
   1224 		for (u32 index = 0; index < extension_count; index++)
   1225 			ext_str8s[index] = str8_from_c_str(extensions[index].extensionName);
   1226 
   1227 		b8 *supported = push_array(arena, b8, countof(vk_required_device_extensions));
   1228 		for EachIndex(extension_count, index)
   1229 			for EachElement(vk_required_device_extensions, it)
   1230 				supported[it] |= str8_equal(vk_required_device_extensions[it], ext_str8s[index]);
   1231 
   1232 		u32 supported_count = 0;
   1233 		for EachElement(vk_required_device_extensions, it)
   1234 			supported_count += supported[it];
   1235 
   1236 		u32 missing_count = countof(vk_required_device_extensions) - supported_count;
   1237 		if (missing_count) {
   1238 			stream_append_str8s(err, vulkan_info("fatal error: missing required device extension"),
   1239 			                    missing_count > 1 ? str8("s") : str8(""), str8(":\n"));
   1240 			for EachElement(vk_required_device_extensions, it) {
   1241 				if (!supported[it]) {
   1242 					str8 name = vk_required_device_extensions[it];
   1243 					stream_append_str8s(err, vulkan_info("    "), name, str8("\n"));
   1244 				}
   1245 			}
   1246 			fatal(stream_to_str8(err));
   1247 		}
   1248 
   1249 		for EachIndex(extension_count, index)
   1250 			for EachElement(vk_optional_device_extensions, it)
   1251 				vulkan_config.optional.E[it] |= str8_equal(vk_optional_device_extensions[it], ext_str8s[index]);
   1252 
   1253 		#if BEAMFORMER_DEBUG
   1254 		for EachIndex(extension_count, index)
   1255 			for EachElement(vk_debug_extensions, it)
   1256 				vulkan_config.debug.E[it] |= str8_equal(vk_debug_extensions[it], ext_str8s[index]);
   1257 		#endif
   1258 	}
   1259 
   1260 	{
   1261 		VkPhysicalDeviceFeatures2        df   = {.sType = VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_FEATURES_2};
   1262 		VkPhysicalDeviceVulkan11Features v11f = {.sType = VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_VULKAN_1_1_FEATURES};
   1263 		VkPhysicalDeviceVulkan12Features v12f = {.sType = VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_VULKAN_1_2_FEATURES};
   1264 		VkPhysicalDeviceVulkan13Features v13f = {.sType = VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_VULKAN_1_3_FEATURES};
   1265 		df.pNext   = &v11f;
   1266 		v11f.pNext = &v12f;
   1267 		v12f.pNext = &v13f;
   1268 		vkGetPhysicalDeviceFeatures2(vk->physical_device, &df);
   1269 
   1270 		{
   1271 			b32 all_supported = 1;
   1272 			#define X(name, ...) all_supported &= df.features.name;
   1273 			VK_REQUIRED_PHYSICAL_FEATURES
   1274 			#undef X
   1275 
   1276 			if (!all_supported) {
   1277 				stream_append_str8(err, vulkan_info("fatal error: missing physical device features:\n"));
   1278 				#define X(name, ...) if (!df.features.name) stream_append_str8(err, str8("    " #name "\n"));
   1279 				VK_REQUIRED_PHYSICAL_FEATURES
   1280 				#undef X
   1281 				fatal(stream_to_str8(err));
   1282 			}
   1283 		}
   1284 
   1285 		{
   1286 			b32 all_supported = 1;
   1287 			#define X(name, ...) all_supported &= v11f.name;
   1288 			VK_REQUIRED_PHYSICAL_11_FEATURES
   1289 			#undef X
   1290 
   1291 			if (!all_supported) {
   1292 				stream_append_str8(err, vulkan_info("fatal error: missing physical device features:\n"));
   1293 				#define X(name, ...) if (!v11f.name) stream_append_str8(err, str8("    " #name "\n"));
   1294 				VK_REQUIRED_PHYSICAL_11_FEATURES
   1295 				#undef X
   1296 				fatal(stream_to_str8(err));
   1297 			}
   1298 		}
   1299 
   1300 		{
   1301 			b32 all_supported = 1;
   1302 			#define X(name, ...) all_supported &= v12f.name;
   1303 			VK_REQUIRED_PHYSICAL_12_FEATURES
   1304 			#undef X
   1305 
   1306 			if (!all_supported) {
   1307 				stream_append_str8(err, vulkan_info("fatal error: missing physical device features:\n"));
   1308 				#define X(name, ...) if (!v12f.name) stream_append_str8(err, str8("    " #name "\n"));
   1309 				VK_REQUIRED_PHYSICAL_12_FEATURES
   1310 				#undef X
   1311 				fatal(stream_to_str8(err));
   1312 			}
   1313 		}
   1314 
   1315 		{
   1316 			b32 all_supported = 1;
   1317 			#define X(name, ...) all_supported &= v13f.name;
   1318 			VK_REQUIRED_PHYSICAL_13_FEATURES
   1319 			#undef X
   1320 
   1321 			if (!all_supported) {
   1322 				stream_append_str8(err, vulkan_info("fatal error: missing physical device features:\n"));
   1323 				#define X(name, ...) if (!v13f.name) stream_append_str8(err, str8("    " #name "\n"));
   1324 				VK_REQUIRED_PHYSICAL_13_FEATURES
   1325 				#undef X
   1326 				fatal(stream_to_str8(err));
   1327 			}
   1328 		}
   1329 
   1330 		if (vulkan_config.optional.cooperative_matrix) {
   1331 			u32 property_count = 0;
   1332 			vkGetPhysicalDeviceCooperativeMatrixPropertiesKHR(vk->physical_device, &property_count, 0);
   1333 
   1334 			VkCooperativeMatrixPropertiesKHR *mat = push_array(arena, VkCooperativeMatrixPropertiesKHR, property_count);
   1335 
   1336 			// NOTE(rnp): validation layer stupidity
   1337 			for EachIndex(property_count, it)
   1338 				mat[it].sType = VK_STRUCTURE_TYPE_COOPERATIVE_MATRIX_PROPERTIES_KHR;
   1339 
   1340 			vkGetPhysicalDeviceCooperativeMatrixPropertiesKHR(vk->physical_device, &property_count, mat);
   1341 			b32 supported = 0;
   1342 			// TODO(rnp): for now the requirements are hardcoded, it is possible to support a couple
   1343 			// variations if needed.
   1344 			for EachIndex(property_count, it) {
   1345 				b32 match = 1;
   1346 				match &= mat[it].scope == VK_SCOPE_SUBGROUP_KHR;
   1347 
   1348 				match &= mat[it].MSize == 16;
   1349 				match &= mat[it].NSize == 16;
   1350 				match &= mat[it].KSize == 16;
   1351 
   1352 				match &= mat[it].AType == VK_COMPONENT_TYPE_FLOAT16_KHR;
   1353 				match &= mat[it].BType == VK_COMPONENT_TYPE_FLOAT16_KHR;
   1354 				match &= mat[it].CType == VK_COMPONENT_TYPE_FLOAT32_KHR;
   1355 				match &= mat[it].ResultType == VK_COMPONENT_TYPE_FLOAT32_KHR;
   1356 
   1357 				supported |= match;
   1358 			}
   1359 			vk->gpu_info.cooperative_matrix = supported;
   1360 		}
   1361 	}
   1362 
   1363 	VkPhysicalDeviceMemoryProperties2 mp = {.sType = VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_MEMORY_PROPERTIES_2};
   1364 	vkGetPhysicalDeviceMemoryProperties2(vk->physical_device, &mp);
   1365 
   1366 	VkPhysicalDeviceMemoryProperties *bmp = &mp.memoryProperties;
   1367 
   1368 	// NOTE(rnp): vulkan spec says that highest performance memory types must
   1369 	// come first. just take the first one found.
   1370 
   1371 	for (u32 i = 0; i < bmp->memoryHeapCount; i++) {
   1372 		if (bmp->memoryHeaps[i].flags & VK_MEMORY_HEAP_DEVICE_LOCAL_BIT) {
   1373 			vk->memory_info.gpu_heap_index = i;
   1374 			break;
   1375 		}
   1376 	}
   1377 
   1378 	for (u32 i = 0; i < bmp->memoryTypeCount; i++) {
   1379 		if (bmp->memoryTypes[i].propertyFlags & VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT) {
   1380 			assert(bmp->memoryTypes[i].heapIndex == vk->memory_info.gpu_heap_index);
   1381 			vk->memory_info.memory_type_indices[VulkanMemoryKind_Device] = i;
   1382 			break;
   1383 		}
   1384 	}
   1385 
   1386 	// TODO(rnp): it is possible that this isn't available. for devices like that we would need
   1387 	// to copy into a staging buffer then DMA. For now that is unsupported.
   1388 	u32 bar_flags = VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT|VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT;
   1389 	i32 bar_index = -1;
   1390 	for (u32 i = 0; i < bmp->memoryTypeCount; i++) {
   1391 		if ((bmp->memoryTypes[i].propertyFlags & bar_flags) == bar_flags) {
   1392 			assert(bmp->memoryTypes[i].heapIndex == vk->memory_info.gpu_heap_index);
   1393 			bar_index = (i32)i;
   1394 			break;
   1395 		}
   1396 	}
   1397 
   1398 	// TODO(rnp): this shouldn't be fatal
   1399 	if (bar_index == -1) {
   1400 		stream_append_str8(err, vulkan_info("fatal error: GPU does not support host bar memory\n"));
   1401 		fatal(stream_to_str8(err));
   1402 	}
   1403 
   1404 	vk->memory_info.memory_type_indices[VulkanMemoryKind_BAR] = bar_index;
   1405 
   1406 	vk->memory_info.memory_type_indices[VulkanMemoryKind_Host] = -1;
   1407 	for (u32 i = 0; i < bmp->memoryTypeCount; i++) {
   1408 		if ((bmp->memoryTypes[i].propertyFlags & VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT) == 0) {
   1409 			if (bmp->memoryTypes[i].propertyFlags & VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT) {
   1410 				vk->memory_info.memory_type_indices[VulkanMemoryKind_Host] = (i8)i;
   1411 				break;
   1412 			}
   1413 		}
   1414 	}
   1415 
   1416 	// NOTE(rnp): some devices are fully unified so the only memory type is BAR memory
   1417 	if (vk->memory_info.memory_type_indices[VulkanMemoryKind_Host] == -1 && bar_index != -1)
   1418 		vk->memory_info.memory_type_indices[VulkanMemoryKind_Host] = bar_index;
   1419 
   1420 	if (vk->memory_info.memory_type_indices[VulkanMemoryKind_Host] == -1) {
   1421 		stream_append_str8(err, vulkan_info("fatal error: vulkan driver does not provide host visible memory\n"));
   1422 		fatal(stream_to_str8(err));
   1423 	}
   1424 
   1425 	for EachElement(vk->memory_info.memory_type_indices, it) {
   1426 		u32 ti    = vk->memory_info.memory_type_indices[it];
   1427 		u32 flags = bmp->memoryTypes[ti].propertyFlags;
   1428 		vk->memory_info.memory_host_coherent[it] = (flags & VK_MEMORY_PROPERTY_HOST_COHERENT_BIT) != 0;
   1429 	}
   1430 
   1431 	vulkan_config.driver_api_version       = dp.properties.apiVersion;
   1432 	vk->memory_info.max_allocation_size    = v11p.maxMemoryAllocationSize;
   1433 	vk->memory_info.non_coherent_atom_size = dp.properties.limits.nonCoherentAtomSize;
   1434 	vk->gpu_info.vendor                    = dp.properties.vendorID;
   1435 	vk->gpu_info.gpu_heap_size             = bmp->memoryHeaps[vk->memory_info.gpu_heap_index].size;
   1436 	vk->gpu_info.timestamp_period_ns       = dp.properties.limits.timestampPeriod;
   1437 	vk->gpu_info.max_image_dimension_2D    = dp.properties.limits.maxImageDimension2D;
   1438 	vk->gpu_info.max_image_dimension_3D    = dp.properties.limits.maxImageDimension3D;
   1439 	vk->gpu_info.max_msaa_samples          = round_down_power_of_two(dp.properties.limits.framebufferColorSampleCounts);
   1440 	vk->gpu_info.subgroup_size             = v11p.subgroupSize;
   1441 	vk->gpu_info.max_compute_shared_memory_size = dp.properties.limits.maxComputeSharedMemorySize;
   1442 
   1443 	temp_end(scratch);
   1444 	// IMPORTANT(rnp): memory must only be pushed at the end of the function
   1445 	vk->gpu_info.name = push_str8(vk->arena, str8_from_c_str(dp.properties.deviceName));
   1446 
   1447 	#if BEAMFORMER_DEBUG
   1448 	{
   1449 		b32 mismatch = 0;
   1450 		for EachElement(vk_validation_layers, it) {
   1451 			u32 lv = vulkan_config.layers.version.E[it];
   1452 			u32 dv = vulkan_config.driver_api_version;
   1453 			if (lv < dv) {
   1454 				mismatch = 1;
   1455 				stream_append_str8s(err, vulkan_info("warning: validaton layer \""),
   1456 				                    vk_validation_layers[it], str8("\" version: "));
   1457 				stream_appendf(err, "%u.%u.%u", VK_API_VERSION_MAJOR(lv), VK_API_VERSION_MINOR(lv), VK_API_VERSION_PATCH(lv));
   1458 				stream_append_str8(err, str8(" lower than driver API version: "));
   1459 				stream_appendf(err, "%u.%u.%u\n", VK_API_VERSION_MAJOR(dv), VK_API_VERSION_MINOR(dv), VK_API_VERSION_PATCH(dv));
   1460 			}
   1461 		}
   1462 
   1463 		if (mismatch)
   1464 			stream_append_str8(err, vulkan_info("DO NOT report any bugs without updating your validation layers!\n"));
   1465 	}
   1466 	#endif
   1467 }
   1468 
   1469 function void
   1470 vk_load_queues(Arena *arena, Stream *err)
   1471 {
   1472 	///////////////////////////////////////////////////////
   1473 	// NOTE(rnp): try to allocate an appropriate queue for
   1474 	// each of the following tasks:
   1475 	//   * UI Rendering (Graphics)
   1476 	//   * Beamforming  (Compute)
   1477 	//   * Upload       (Transfer)
   1478 	// Then create a logical device ready for use
   1479 
   1480 	VulkanContext *vk = vulkan_context;
   1481 
   1482 	u32 queue_family_count;
   1483 	vkGetPhysicalDeviceQueueFamilyProperties(vk->physical_device, &queue_family_count, 0);
   1484 
   1485 	Temp scratch = temp_begin(arena);
   1486 	VkQueueFamilyProperties *queues = push_array(arena, typeof(*queues), queue_family_count);
   1487 	vkGetPhysicalDeviceQueueFamilyProperties(vk->physical_device, &queue_family_count, queues);
   1488 
   1489 	i32 queue_indices[VulkanQueueKind_Count];
   1490 	for EachElement(queue_indices, it) queue_indices[it] = -1;
   1491 
   1492 	///////////////////////////////////////////////////////////////
   1493 	// NOTE(rnp): start by assigning queue families for each queue
   1494 
   1495 	/* NOTE(rnp): try for exclusive transfer queue */
   1496 	#if !ForceSingleQueue
   1497 	{
   1498 		u32 mask = VK_QUEUE_GRAPHICS_BIT|VK_QUEUE_COMPUTE_BIT|VK_QUEUE_TRANSFER_BIT;
   1499 		u32 max_timestamp_bits = 0;
   1500 		for (u32 index = 0; index < queue_family_count; index++) {
   1501 			if ((queues[index].queueFlags & mask) == VK_QUEUE_TRANSFER_BIT) {
   1502 				if (queues[index].timestampValidBits > max_timestamp_bits) {
   1503 					max_timestamp_bits = queues[index].timestampValidBits;
   1504 					queue_indices[VulkanQueueKind_Transfer] = (i32)index;
   1505 				}
   1506 			}
   1507 		}
   1508 	}
   1509 
   1510 	/* NOTE(rnp): try for compute separate from graphics */
   1511 	for (u32 index = 0; index < queue_family_count; index++) {
   1512 		if ((queues[index].queueFlags & VK_QUEUE_COMPUTE_BIT)  != 0 &&
   1513 		    (queues[index].queueFlags & VK_QUEUE_GRAPHICS_BIT) == 0)
   1514 		{
   1515 			queue_indices[VulkanQueueKind_Compute] = (i32)index;
   1516 			break;
   1517 		}
   1518 	}
   1519 	#endif /* !ForceSingleQueue */
   1520 
   1521 	/* NOTE(rnp): find graphics family and verify it is exclusive */
   1522 	b32 multi_graphics = 0;
   1523 	for (u32 index = 0; index < queue_family_count; index++) {
   1524 		if ((queues[index].queueFlags & VK_QUEUE_GRAPHICS_BIT) != 0) {
   1525 			// TODO(rnp): check for presentation support
   1526 			multi_graphics = queue_indices[VulkanQueueKind_Graphics] != -1;
   1527 			queue_indices[VulkanQueueKind_Graphics] = (i32)index;
   1528 		}
   1529 	}
   1530 
   1531 	if (multi_graphics)
   1532 		stream_append_str8(err, vulkan_info("warning: multiple queue families reported graphics support\n"));
   1533 
   1534 	if (queue_indices[VulkanQueueKind_Graphics] == -1) {
   1535 		stream_append_str8(err, vulkan_info("fatal error: GPU does not support graphics presentation\n"));
   1536 		fatal(stream_to_str8(err));
   1537 	}
   1538 
   1539 	if (queue_indices[VulkanQueueKind_Compute] == -1)
   1540 		if ((queues[queue_indices[VulkanQueueKind_Graphics]].queueFlags & VK_QUEUE_COMPUTE_BIT) != 0)
   1541 			queue_indices[VulkanQueueKind_Compute] = queue_indices[VulkanQueueKind_Graphics];
   1542 
   1543 	if (queue_indices[VulkanQueueKind_Compute] == -1) {
   1544 		stream_append_str8(err, vulkan_info("fatal error: GPU does not support compute\n"));
   1545 		fatal(stream_to_str8(err));
   1546 	}
   1547 
   1548 	if (queue_indices[VulkanQueueKind_Transfer] == -1) {
   1549 		if ((queues[queue_indices[VulkanQueueKind_Compute]].queueFlags & VK_QUEUE_TRANSFER_BIT) != 0)
   1550 			queue_indices[VulkanQueueKind_Transfer] = queue_indices[VulkanQueueKind_Compute];
   1551 		else if ((queues[queue_indices[VulkanQueueKind_Graphics]].queueFlags & VK_QUEUE_TRANSFER_BIT) != 0)
   1552 			queue_indices[VulkanQueueKind_Transfer] = queue_indices[VulkanQueueKind_Graphics];
   1553 	}
   1554 
   1555 	if (queue_indices[VulkanQueueKind_Transfer] == -1) {
   1556 		stream_append_str8(err, vulkan_info("fatal error: GPU does not support data transfer\n"));
   1557 		fatal(stream_to_str8(err));
   1558 	}
   1559 
   1560 	/////////////////////////////////////////////////////////////////
   1561 	// NOTE(rnp): if queues share families try to allocate subqueues
   1562 
   1563 	u32 assigned_subindices[VulkanQueueKind_Count] = {0};
   1564 	i32 queue_subindices[VulkanQueueKind_Count]    = {0};
   1565 
   1566 	assigned_subindices[VulkanQueueKind_Graphics] += 1;
   1567 
   1568 	if (queue_indices[VulkanQueueKind_Compute] == queue_indices[VulkanQueueKind_Graphics]) {
   1569 		if (assigned_subindices[VulkanQueueKind_Graphics] < queues[queue_indices[VulkanQueueKind_Graphics]].queueCount)
   1570 			queue_subindices[VulkanQueueKind_Compute] = assigned_subindices[VulkanQueueKind_Graphics]++;
   1571 	} else {
   1572 		assigned_subindices[VulkanQueueKind_Compute] += 1;
   1573 	}
   1574 
   1575 	if (queue_indices[VulkanQueueKind_Transfer] == queue_indices[VulkanQueueKind_Graphics]) {
   1576 		if (assigned_subindices[VulkanQueueKind_Graphics] < queues[queue_indices[VulkanQueueKind_Graphics]].queueCount)
   1577 			queue_subindices[VulkanQueueKind_Transfer] = assigned_subindices[VulkanQueueKind_Graphics]++;
   1578 	} else if (queue_indices[VulkanQueueKind_Transfer] == queue_indices[VulkanQueueKind_Compute]) {
   1579 		if (assigned_subindices[VulkanQueueKind_Compute] < queues[queue_indices[VulkanQueueKind_Compute]].queueCount)
   1580 			queue_subindices[VulkanQueueKind_Transfer] = assigned_subindices[VulkanQueueKind_Compute]++;
   1581 	} else {
   1582 		assigned_subindices[VulkanQueueKind_Transfer] += 1;
   1583 	}
   1584 
   1585 	for EachElement(assigned_subindices, it)
   1586 		vk->unique_queues += assigned_subindices[it];
   1587 
   1588 	temp_end(scratch);
   1589 
   1590 	/////////////////////////////////////////////
   1591 	// NOTE(rnp): fill in info and create device
   1592 	for EachElement(vk->queues, it) {
   1593 		u32 index = queue_subindices[it];
   1594 		for (i32 i = 0; i < queue_indices[it]; i++)
   1595 			index += assigned_subindices[i];
   1596 		vk->queue_indices[it] = index;
   1597 	}
   1598 
   1599 	for EachElement(vk->queues, it) {
   1600 		if (vk->queues[vk->queue_indices[it]] == 0) {
   1601 			vk->queues[vk->queue_indices[it]] = push_struct(vk->arena, VulkanQueue);
   1602 			vk->queues[vk->queue_indices[it]]->queue_family = queue_indices[it];
   1603 			vk->queues[vk->queue_indices[it]]->queue_index  = queue_subindices[it];
   1604 		}
   1605 		vk->queues[it] = vk->queues[vk->queue_indices[it]];
   1606 	}
   1607 
   1608 	for EachElement(vk->command_pools, it)
   1609 		vk->command_pools[it] = push_struct(vk->arena, VulkanCommandPool);
   1610 
   1611 	VkDeviceQueueCreateInfo queue_create_infos[VulkanQueueKind_Count];
   1612 
   1613 	f32 queue_priorities[VulkanQueueKind_Count][VulkanQueueKind_Count];
   1614 	for (u32 i = 0; i < VulkanQueueKind_Count; i++)
   1615 		for (u32 j = 0; j < VulkanQueueKind_Count; j++)
   1616 			queue_priorities[i][j] = 1.0f;
   1617 	queue_priorities[queue_indices[VulkanQueueKind_Compute]][queue_subindices[VulkanQueueKind_Compute]] = 0.5f;
   1618 
   1619 	u32 queue_create_index = 0;
   1620 	b32 queue_info_filled[VulkanQueueKind_Count] = {0};
   1621 	for (u32 q = 0; q < vk->unique_queues; q++) {
   1622 		u32 base_q = queue_indices[q];
   1623 		if (!queue_info_filled[base_q]) {
   1624 			queue_create_infos[queue_create_index++] = (VkDeviceQueueCreateInfo){
   1625 				.sType            = VK_STRUCTURE_TYPE_DEVICE_QUEUE_CREATE_INFO,
   1626 				.queueFamilyIndex = base_q,
   1627 				.queueCount       = assigned_subindices[q],
   1628 				.pQueuePriorities = queue_priorities[q],
   1629 			};
   1630 		}
   1631 		queue_info_filled[base_q] = 1;
   1632 	}
   1633 
   1634 	u32 enabled_count = 0;
   1635 	const char *enabled_extensions[MAX_ENABLED_EXTENSIONS];
   1636 
   1637 	for EachElement(vk_required_device_extensions, it)
   1638 		enabled_extensions[enabled_count++] = (char *)vk_required_device_extensions[it].data;
   1639 
   1640 	for EachElement(vk_optional_device_extensions, it)
   1641 		if (vulkan_config.optional.E[it])
   1642 			enabled_extensions[enabled_count++] = (char *)vk_optional_device_extensions[it].data;
   1643 
   1644 	for EachElement(vk_debug_extensions, it)
   1645 		if (vulkan_config.debug.E[it])
   1646 			enabled_extensions[enabled_count++] = (char *)vk_debug_extensions[it].data;
   1647 
   1648 	VkDeviceCreateInfo device_create_info = {
   1649 		.sType                   = VK_STRUCTURE_TYPE_DEVICE_CREATE_INFO,
   1650 		.pQueueCreateInfos       = queue_create_infos,
   1651 		.queueCreateInfoCount    = queue_create_index,
   1652 		.ppEnabledExtensionNames = enabled_extensions,
   1653 		.enabledExtensionCount   = enabled_count,
   1654 	};
   1655 
   1656 	VkPhysicalDeviceShaderRelaxedExtendedInstructionFeaturesKHR pdsre = {
   1657 		.sType = VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_SHADER_RELAXED_EXTENDED_INSTRUCTION_FEATURES_KHR,
   1658 		.shaderRelaxedExtendedInstruction = 1,
   1659 	};
   1660 	if (vulkan_config.debug.shader_relaxed_extended_instruction) {
   1661 		pdsre.pNext = (void *)device_create_info.pNext;
   1662 		device_create_info.pNext = &pdsre;
   1663 	}
   1664 
   1665 	VkPhysicalDeviceCooperativeMatrixFeaturesKHR coop_mat_features = {
   1666 		.sType = VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_COOPERATIVE_MATRIX_FEATURES_KHR,
   1667 		.cooperativeMatrix = 1,
   1668 		.cooperativeMatrixRobustBufferAccess = 0,
   1669 	};
   1670 	if (vk->gpu_info.cooperative_matrix) {
   1671 		coop_mat_features.pNext = (void *)device_create_info.pNext;
   1672 		device_create_info.pNext = &coop_mat_features;
   1673 	}
   1674 
   1675 	VkPhysicalDeviceVulkan13Features v13f = {
   1676 		.sType = VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_VULKAN_1_3_FEATURES,
   1677 		.pNext = (void *)device_create_info.pNext,
   1678 		#define X(name, ...) .name = 1,
   1679 		VK_REQUIRED_PHYSICAL_13_FEATURES
   1680 		#undef X
   1681 	};
   1682 	device_create_info.pNext = &v13f;
   1683 
   1684 	VkPhysicalDeviceVulkan12Features v12f = {
   1685 		.sType = VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_VULKAN_1_2_FEATURES,
   1686 		.pNext = (void *)device_create_info.pNext,
   1687 		#define X(name, ...) .name = 1,
   1688 		VK_REQUIRED_PHYSICAL_12_FEATURES
   1689 		#undef X
   1690 	};
   1691 	device_create_info.pNext = &v12f;
   1692 
   1693 	VkPhysicalDeviceVulkan11Features v11f = {
   1694 		.sType = VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_VULKAN_1_1_FEATURES,
   1695 		.pNext = (void *)device_create_info.pNext,
   1696 		#define X(name, ...) .name = 1,
   1697 		VK_REQUIRED_PHYSICAL_11_FEATURES
   1698 		#undef X
   1699 	};
   1700 	device_create_info.pNext = &v11f;
   1701 
   1702 	VkPhysicalDeviceFeatures2 device_features = {
   1703 		.sType = VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_FEATURES_2,
   1704 		.pNext = (void *)device_create_info.pNext,
   1705 		.features = {
   1706 			#define X(name, ...) .name = 1,
   1707 			VK_REQUIRED_PHYSICAL_FEATURES
   1708 			#undef X
   1709 		},
   1710 	};
   1711 	device_create_info.pNext = &device_features;
   1712 
   1713 	vkCreateDevice(vk->physical_device, &device_create_info, 0, &vk->device);
   1714 
   1715 	#define X(name, ...) name = (name##_fn *)vkGetDeviceProcAddr(vk->device, #name);
   1716 	VkDeviceProcedureList
   1717 	#undef X
   1718 
   1719 	for (u32 q = 0; q < vk->unique_queues; q++) {
   1720 		VulkanQueue *qp = vk->queues[q];
   1721 		vkGetDeviceQueue(vk->device, qp->queue_family, qp->queue_index, &qp->queue);
   1722 
   1723 		qp->timeline_semaphore = vk_make_semaphore(0);
   1724 	}
   1725 
   1726 	vk->queues[VulkanQueueKind_Graphics]->pipeline_stage_flags |= VK_PIPELINE_STAGE_2_ALL_GRAPHICS_BIT;
   1727 	vk->queues[VulkanQueueKind_Compute]->pipeline_stage_flags  |= VK_PIPELINE_STAGE_2_COMPUTE_SHADER_BIT;
   1728 
   1729 	for EachElement(vk->command_pools, it) {
   1730 		VulkanCommandPool *vcp = vk->command_pools[it];
   1731 
   1732 		VkCommandPoolCreateInfo command_pool_create_info = {
   1733 			.sType = VK_STRUCTURE_TYPE_COMMAND_POOL_CREATE_INFO,
   1734 			.flags = VK_COMMAND_POOL_CREATE_RESET_COMMAND_BUFFER_BIT,
   1735 			.queueFamilyIndex = vk->queues[it]->queue_family,
   1736 		};
   1737 
   1738 		vkCreateCommandPool(vk->device, &command_pool_create_info, 0, &vcp->handle);
   1739 
   1740 		VkCommandBufferAllocateInfo command_buffer_allocate_info = {
   1741 			.sType              = VK_STRUCTURE_TYPE_COMMAND_BUFFER_ALLOCATE_INFO,
   1742 			.commandPool        = vcp->handle,
   1743 			.level              = VK_COMMAND_BUFFER_LEVEL_PRIMARY,
   1744 			.commandBufferCount = countof(vcp->buffers),
   1745 		};
   1746 		vkAllocateCommandBuffers(vk->device, &command_buffer_allocate_info, vcp->buffers);
   1747 
   1748 		VkQueryPoolCreateInfo query_pool_create_info = {
   1749 			.sType      = VK_STRUCTURE_TYPE_QUERY_POOL_CREATE_INFO,
   1750 			.queryType  = VK_QUERY_TYPE_TIMESTAMP,
   1751 			.queryCount = MaxCommandBuffersInFlight * MaxCommandBufferTimestamps,
   1752 		};
   1753 		vkCreateQueryPool(vk->device, &query_pool_create_info, 0, &vcp->query_pool);
   1754 	}
   1755 }
   1756 
   1757 function void
   1758 vk_load_graphics(void)
   1759 {
   1760 	VulkanContext *vk = vulkan_context;
   1761 
   1762 	// NOTE: swap chain image format
   1763 	{
   1764 	}
   1765 
   1766 	// NOTE: depth/stencil format
   1767 	{
   1768 		VkFormat depth_formats[] = {
   1769 			VK_FORMAT_D32_SFLOAT_S8_UINT,
   1770 			VK_FORMAT_D24_UNORM_S8_UINT,
   1771 			VK_FORMAT_D16_UNORM_S8_UINT,
   1772 		};
   1773 
   1774 		vk->depth_stencil_format = VK_FORMAT_UNDEFINED;
   1775 		for EachElement(depth_formats, it) {
   1776 			VkFormatProperties3 format_properties3 = {.sType = VK_STRUCTURE_TYPE_FORMAT_PROPERTIES_3};
   1777 			VkFormatProperties2 format_properties2 = {
   1778 				.sType = VK_STRUCTURE_TYPE_FORMAT_PROPERTIES_2,
   1779 				.pNext = &format_properties3,
   1780 			};
   1781 			vkGetPhysicalDeviceFormatProperties2(vk->physical_device, depth_formats[it], &format_properties2);
   1782 			if (format_properties3.optimalTilingFeatures & VK_FORMAT_FEATURE_2_DEPTH_STENCIL_ATTACHMENT_BIT) {
   1783 				vk->depth_stencil_format = depth_formats[it];
   1784 				break;
   1785 			}
   1786 		}
   1787 	}
   1788 }
   1789 
   1790 ///////////////////////
   1791 // NOTE(rnp): User API
   1792 
   1793 DEBUG_IMPORT void
   1794 vk_load(OSLibrary vulkan_library_handle, Stream *err)
   1795 {
   1796 	#define X(name, ...) name = (name##_fn *)os_lookup_symbol(vulkan_library_handle, #name);
   1797 	VkLoaderProcedureList
   1798 	#undef X
   1799 
   1800 	if (!vkGetInstanceProcAddr) {
   1801 		stream_append_str8(err, vulkan_info("fatal error: failed to find \"vkGetInstanceProcAddr\"\n"));
   1802 		fatal(stream_to_str8(err));
   1803 	}
   1804 
   1805 	VulkanContext *vk = vulkan_context;
   1806 	vk->arena        = arena_create(.name = "Vulkan Arena");
   1807 	vk->entity_arena = arena_create(.name = "Vulkan Entity Arena");
   1808 
   1809 	vk_load_instance(vk->arena, err);
   1810 	vk_load_physical_device(vk->arena, err);
   1811 	vk_load_queues(vk->arena, err);
   1812 	vk_load_graphics();
   1813 
   1814 	read_only local_persist str8 default_compute_shader = str8(""
   1815 		"#version 430 core\n"
   1816 		"layout(push_constant) uniform pc { uint data[256 / 4]; };\n"
   1817 		"void main() {}\n"
   1818 		"\n");
   1819 	VulkanPipelineCreateInfo compute_create_info = {.text = default_compute_shader, .name = str8("error_compute_shader")};
   1820 	vk->default_compute_pipeline = vk_compute_pipeline_from_info(vk->arena, &compute_create_info, 256);
   1821 
   1822 	read_only local_persist str8 default_vertex_shader = str8(""
   1823 		"#version 430 core\n"
   1824 		"layout(push_constant) uniform pc { uint data[256 / 4]; };\n"
   1825 		"void main() {gl_Position = vec4(0);}\n"
   1826 		"\n");
   1827 	read_only local_persist str8 default_fragment_shader = str8(""
   1828 		"#version 430 core\n"
   1829 		"layout(location = 0) out vec4 out_colour;"
   1830 		"layout(push_constant) uniform pc { uint data[256 / 4]; };\n"
   1831 		"void main() {out_colour = vec4(0.5f, 0.0f, 0.5f, 1.0f);}\n"
   1832 		"\n");
   1833 
   1834 	VulkanPipelineCreateInfo pipeline_create_infos[2] = {
   1835 		{
   1836 			.kind = VulkanShaderKind_Vertex,
   1837 			.text = default_vertex_shader,
   1838 			.name = str8("error_vertex_shader"),
   1839 		},
   1840 		{
   1841 			.kind = VulkanShaderKind_Fragment,
   1842 			.text = default_fragment_shader,
   1843 			.name = str8("error_fragment_shader"),
   1844 		},
   1845 	};
   1846 	vk->default_graphics_pipeline = vk_graphics_pipeline_from_infos(vk->arena, pipeline_create_infos, 2, 256);
   1847 
   1848 	// TODO: setup ui render pipeline
   1849 
   1850 	if (err->widx > 0) {
   1851 		os_console_log(err->data, err->widx);
   1852 		stream_reset(err, 0);
   1853 	}
   1854 }
   1855 
   1856 DEBUG_IMPORT GPUInfo *
   1857 gpu_info(void)
   1858 {
   1859 	return &vulkan_context->gpu_info;
   1860 }
   1861 
   1862 function void
   1863 vk_vulkan_buffer_release(VulkanBuffer *vb)
   1864 {
   1865 	VulkanContext *vk = vulkan_context;
   1866 	VulkanEntity  *e  = (VulkanEntity *)((u8 *)vb - offsetof(VulkanEntity, as));
   1867 	// TODO(rnp): this happens implicitly, probably just delete this if block
   1868 	if (vb->host_pointer)
   1869 		vkUnmapMemory(vk->device, vb->memory);
   1870 
   1871 	if (vb->buffer)
   1872 		vkDestroyBuffer(vk->device, vb->buffer, 0);
   1873 
   1874 	vk_release_memory(vb->memory, vb->memory_kind != VulkanMemoryKind_Host ? vb->memory_size : 0);
   1875 	vk_entity_release(e);
   1876 }
   1877 
   1878 DEBUG_IMPORT void
   1879 gpu_buffer_release(GPUBuffer *b)
   1880 {
   1881 	if (b->handle.value)
   1882 		vk_vulkan_buffer_release(vk_entity_data(b->handle.value, VulkanEntityKind_Buffer));
   1883 	zero_struct(b);
   1884 }
   1885 
   1886 DEBUG_IMPORT void
   1887 gpu_buffer_allocate(GPUBuffer *b, GPUBufferAllocateInfo info)
   1888 {
   1889 	VulkanContext *vk = vulkan_context;
   1890 
   1891 	gpu_buffer_release(b);
   1892 
   1893 	assert(info.size >= 0);
   1894 
   1895 	if (info.size > 0) {
   1896 		VulkanEntity *e = vk_entity_allocate(VulkanEntityKind_Buffer);
   1897 		VulkanBufferAllocateInfo vulkan_buffer_allocate_info = {
   1898 			.gpu_buffer = b,
   1899 			.size       = (u64)info.size,
   1900 			.flags      = info.flags,
   1901 			.index_type = VK_INDEX_TYPE_NONE_KHR,
   1902 			.label      = info.label,
   1903 			.export     = info.export,
   1904 		};
   1905 
   1906 		u32 queue_index_hit_count[VulkanQueueKind_Count] = {0};
   1907 		for (u32 it = 0; it < info.timeline_count; it++)
   1908 			queue_index_hit_count[vk->queue_indices[info.timelines_used[it]]]++;
   1909 
   1910 		for EachElement(queue_index_hit_count, it) {
   1911 			if (queue_index_hit_count[it] > 0) {
   1912 				u32 index = vulkan_buffer_allocate_info.queue_family_count++;
   1913 				vulkan_buffer_allocate_info.queue_family_indices[index] = vk->queues[vk->queue_indices[it]]->queue_family;
   1914 			}
   1915 		}
   1916 
   1917 		if (vk_buffer_allocate_common(&e->as.buffer, &vulkan_buffer_allocate_info)) {
   1918 			b->handle.value = (u64)e;
   1919 		} else {
   1920 			vk_entity_release(e);
   1921 		}
   1922 	}
   1923 }
   1924 
   1925 DEBUG_IMPORT b32
   1926 vk_buffer_needs_sync(GPUBuffer *b)
   1927 {
   1928 	b32 result = 0;
   1929 	if (b->handle.value) {
   1930 		VulkanBuffer *vb = vk_entity_data(b->handle.value, VulkanEntityKind_Buffer);
   1931 
   1932 		// TODO(rnp): not correct check. need to check if we used transfer queue
   1933 		result = vb->memory_kind != VulkanMemoryKind_BAR;
   1934 	}
   1935 
   1936 	return result;
   1937 }
   1938 
   1939 DEBUG_IMPORT u64
   1940 gpu_round_up_to_sync_size(u64 size, u64 min)
   1941 {
   1942 	i64 round  = (i64)Max(min, vulkan_context->memory_info.non_coherent_atom_size);
   1943 	u64 result = (u64)round_up_to((i64)size, round);
   1944 	return result;
   1945 }
   1946 
   1947 function force_inline void
   1948 vk_buffer_buffer_copy(VulkanBuffer *destination, VulkanBuffer *source, u64 destination_offset, u64 source_offset, u64 size, b32 non_temporal)
   1949 {
   1950 	VulkanContext *vk = vulkan_context;
   1951 
   1952 	switch (source->memory_kind) {
   1953 	case VulkanMemoryKind_BAR:
   1954 	{
   1955 		switch (destination->memory_kind) {
   1956 		case VulkanMemoryKind_Host:{
   1957 			if (destination->memory) {
   1958 				// TODO(rnp): there is likely a more efficient way of doing this in this case
   1959 				InvalidCodePath;
   1960 			} else {
   1961 				assert(source->host_pointer);
   1962 				b32 coherent = vk->memory_info.memory_host_coherent[source->memory_kind];
   1963 				if (!coherent) {
   1964 					u64 nca_size = vk->memory_info.non_coherent_atom_size;
   1965 					VkMappedMemoryRange mrs[1] = {{
   1966 						.sType  = VK_STRUCTURE_TYPE_MAPPED_MEMORY_RANGE,
   1967 						.memory = source->memory,
   1968 						.offset = source_offset - (source_offset % nca_size),
   1969 						.size   = gpu_round_up_to_sync_size(size, nca_size),
   1970 					}};
   1971 					vkInvalidateMappedMemoryRanges(vk->device, countof(mrs), mrs);
   1972 				}
   1973 
   1974 				void *dest = (u8 *)destination->host_pointer + destination_offset;
   1975 				void *src  = (u8 *)source->host_pointer + source_offset;
   1976 
   1977 				// NOTE(rnp): don't trash the CPU cache for large data stores
   1978 				if (non_temporal) memory_copy_non_temporal(dest, src, size);
   1979 				else              memory_copy(dest, src, size);
   1980 			}
   1981 		}break;
   1982 		InvalidDefaultCase;
   1983 		}
   1984 	}break;
   1985 
   1986 	case VulkanMemoryKind_Host:{
   1987 		switch (destination->memory_kind) {
   1988 		case VulkanMemoryKind_BAR:{
   1989 			assert(destination->host_pointer);
   1990 
   1991 			void *dest = (u8 *)destination->host_pointer + destination_offset;
   1992 			void *src  = (u8 *)source->host_pointer + source_offset;
   1993 
   1994 			// NOTE(rnp): don't trash the CPU cache for large data stores
   1995 			if (non_temporal) memory_copy_non_temporal(dest, src, size);
   1996 			else              memory_copy(dest, src, size);
   1997 
   1998 			b32 coherent = vk->memory_info.memory_host_coherent[destination->memory_kind];
   1999 			if (!coherent) {
   2000 				u64 nca_size = vk->memory_info.non_coherent_atom_size;
   2001 				VkMappedMemoryRange mrs[1] = {{
   2002 					.sType  = VK_STRUCTURE_TYPE_MAPPED_MEMORY_RANGE,
   2003 					.memory = destination->memory,
   2004 					.offset = destination_offset - (destination_offset % nca_size),
   2005 					.size   = gpu_round_up_to_sync_size(size, nca_size),
   2006 				}};
   2007 				vkFlushMappedMemoryRanges(vk->device, countof(mrs), mrs);
   2008 			}
   2009 		}break;
   2010 		InvalidDefaultCase;
   2011 
   2012 		}
   2013 	}break;
   2014 
   2015 	// TODO(rnp): use transfer queue when not mapped
   2016 	InvalidDefaultCase;
   2017 	}
   2018 }
   2019 
   2020 DEBUG_IMPORT void
   2021 gpu_buffer_range_upload(GPUBuffer *b, void *data, u64 offset, u64 size, b32 non_temporal)
   2022 {
   2023 	VulkanBuffer *db = vk_entity_data(b->handle.value, VulkanEntityKind_Buffer);
   2024 	VulkanBuffer  sb = {
   2025 		.host_pointer = data,
   2026 		.memory_kind  = VulkanMemoryKind_Host,
   2027 	};
   2028 	vk_buffer_buffer_copy(db, &sb, offset, 0, size, non_temporal);
   2029 }
   2030 
   2031 DEBUG_IMPORT void
   2032 gpu_buffer_range_download(void *destination, GPUBuffer *source, u64 offset, u64 size, b32 non_temporal)
   2033 {
   2034 	VulkanBuffer *sb = vk_entity_data(source->handle.value, VulkanEntityKind_Buffer);
   2035 	VulkanBuffer  db = {
   2036 		.host_pointer = destination,
   2037 		.memory_kind  = VulkanMemoryKind_Host,
   2038 	};
   2039 	vk_buffer_buffer_copy(&db, sb, 0, offset, size, non_temporal);
   2040 }
   2041 
   2042 DEBUG_IMPORT void
   2043 vk_render_model_release(GPUBuffer *model)
   2044 {
   2045 	if (model->handle.value)
   2046 		vk_vulkan_buffer_release(vk_entity_data(model->handle.value, VulkanEntityKind_RenderModel));
   2047 	zero_struct(model);
   2048 }
   2049 
   2050 DEBUG_IMPORT void
   2051 vk_render_model_allocate(GPUBuffer *model, void *indices, u64 index_count, u64 model_size, str8 label)
   2052 {
   2053 	vk_render_model_release(model);
   2054 
   2055 	VulkanEntity *e = vk_entity_allocate(VulkanEntityKind_RenderModel);
   2056 
   2057 	assert(index_count <= U32_MAX);
   2058 	VkIndexType index_type;
   2059 	if (index_count <= U16_MAX) index_type = VK_INDEX_TYPE_UINT16;
   2060 	else                        index_type = VK_INDEX_TYPE_UINT32;
   2061 
   2062 	i64 indices_size = round_up_to(vk_index_size(index_type) * index_count, 64);
   2063 
   2064 	i64 size = round_up_to(model_size + indices_size, 64);
   2065 	assert(size > 0);
   2066 
   2067 	VulkanBufferAllocateInfo vulkan_buffer_allocate_info = {
   2068 		.gpu_buffer              = model,
   2069 		.size                    = (u64)size,
   2070 		.flags                   = VulkanUsageFlag_HostReadWrite,
   2071 		.index_type              = index_type,
   2072 		.label                   = label,
   2073 		.queue_family_count      = 1,
   2074 		.queue_family_indices[0] = vulkan_context->queues[VulkanQueueKind_Graphics]->queue_family,
   2075 	};
   2076 	if (vk_buffer_allocate_common(&e->as.buffer, &vulkan_buffer_allocate_info)) {
   2077 		model->handle.value = (u64)e;
   2078 		model->index_count  = index_count;
   2079 		model->gpu_pointer += indices_size;
   2080 
   2081 		VulkanBuffer  sb = {
   2082 			.host_pointer = indices,
   2083 			.memory_kind  = VulkanMemoryKind_Host,
   2084 		};
   2085 
   2086 		vk_buffer_buffer_copy(&e->as.buffer, &sb, 0, 0, vk_index_size(index_type) * index_count, 0);
   2087 	} else {
   2088 		vk_entity_release(e);
   2089 	}
   2090 }
   2091 
   2092 DEBUG_IMPORT void
   2093 vk_render_model_range_upload(GPUBuffer *model, void *data, u64 offset, u64 size, b32 non_temporal)
   2094 {
   2095 	VulkanBuffer *db = vk_entity_data(model->handle.value, VulkanEntityKind_RenderModel);
   2096 	VulkanBuffer  sb = {
   2097 		.host_pointer = data,
   2098 		.memory_kind  = VulkanMemoryKind_Host,
   2099 	};
   2100 
   2101 	offset += round_up_to(vk_index_size(db->index_type) * model->index_count, 64);
   2102 
   2103 	vk_buffer_buffer_copy(db, &sb, offset, 0, size, non_temporal);
   2104 }
   2105 
   2106 DEBUG_IMPORT void
   2107 vk_image_release(GPUImage *image)
   2108 {
   2109 	if ValidVulkanHandle(image->image) {
   2110 		VulkanContext *vk = vulkan_context;
   2111 		VulkanImage   *vi = vk_entity_data(image->image.value[0], VulkanEntityKind_Image);
   2112 
   2113 		vkDestroyImageView(vk->device, vi->view, 0);
   2114 		vkDestroyImage(vk->device, vi->image, 0);
   2115 		vk_release_memory(vi->memory, image->memory_size);
   2116 
   2117 		vk_entity_release((VulkanEntity *)image->image.value[0]);
   2118 	}
   2119 	zero_struct(image);
   2120 }
   2121 
   2122 DEBUG_IMPORT void
   2123 vk_image_allocate(GPUImage *image, u32 width, u32 height, u32 mips, u32 samples,
   2124                   VulkanImageUsage usage, VulkanUsageFlags flags, OSHandle *export, str8 label)
   2125 {
   2126 	assert(IsPowerOfTwo(samples));
   2127 
   2128 	vk_image_release(image);
   2129 
   2130 	VulkanContext *vk = vulkan_context;
   2131 	VulkanEntity  *e  = vk_entity_allocate(VulkanEntityKind_Image);
   2132 	VulkanImage   *vi = &e->as.image;
   2133 
   2134 	image->image.value[0] = (u64)e;
   2135 	image->width          = Min(width,   vk->gpu_info.max_image_dimension_2D);
   2136 	image->height         = Min(height,  vk->gpu_info.max_image_dimension_2D);
   2137 	image->mip_map_levels = Max(mips,    1);
   2138 	image->samples        = Min(samples, vk->gpu_info.max_msaa_samples);
   2139 
   2140 	VkFormat usage_format_map[VulkanImageUsage_Count + 1] = {
   2141 		[VulkanImageUsage_None]         = VK_FORMAT_UNDEFINED,
   2142 		//[VulkanImageUsage_Colour]       = VK_FORMAT_R8G8B8A8_SRGB,
   2143 		[VulkanImageUsage_Colour]       = VK_FORMAT_R8G8B8A8_UNORM,
   2144 		[VulkanImageUsage_DepthStencil] = vk->depth_stencil_format,
   2145 		[VulkanImageUsage_Count]        = VK_FORMAT_UNDEFINED,
   2146 	};
   2147 
   2148 	read_only local_persist VkImageUsageFlagBits usage_extra_bit_map[VulkanImageUsage_Count + 1] = {
   2149 		[VulkanImageUsage_None]         = 0,
   2150 		[VulkanImageUsage_Colour]       = VK_IMAGE_USAGE_COLOR_ATTACHMENT_BIT,
   2151 		[VulkanImageUsage_DepthStencil] = VK_IMAGE_USAGE_DEPTH_STENCIL_ATTACHMENT_BIT,
   2152 		[VulkanImageUsage_Count]        = 0,
   2153 	};
   2154 
   2155 	read_only local_persist VkImageAspectFlags usage_image_aspect_map[VulkanImageUsage_Count + 1] = {
   2156 		[VulkanImageUsage_None]         = 0,
   2157 		[VulkanImageUsage_Colour]       = VK_IMAGE_ASPECT_COLOR_BIT,
   2158 		[VulkanImageUsage_DepthStencil] = VK_IMAGE_ASPECT_DEPTH_BIT|VK_IMAGE_ASPECT_STENCIL_BIT,
   2159 		[VulkanImageUsage_Count]        = 0,
   2160 	};
   2161 
   2162 	usage = Clamp((u32)usage, 0, VulkanImageUsage_Count);
   2163 	VkImageUsageFlagBits usage_flags = usage_extra_bit_map[usage];
   2164 
   2165 	if (flags & VulkanUsageFlag_ImageSampling)       usage_flags |= VK_IMAGE_USAGE_SAMPLED_BIT;
   2166 	if (flags & VulkanUsageFlag_TransferSource)      usage_flags |= VK_IMAGE_USAGE_TRANSFER_SRC_BIT;
   2167 	if (flags & VulkanUsageFlag_TransferDestination) usage_flags |= VK_IMAGE_USAGE_TRANSFER_DST_BIT;
   2168 
   2169 	u32 queue_family = vk->queues[VulkanQueueKind_Graphics]->queue_family;
   2170 	VkImageCreateInfo image_create_info = {
   2171 		.sType                 = VK_STRUCTURE_TYPE_IMAGE_CREATE_INFO,
   2172 		.flags                 = export ? VK_IMAGE_CREATE_MUTABLE_FORMAT_BIT : 0,
   2173 		.imageType             = VK_IMAGE_TYPE_2D,
   2174 		.format                = usage_format_map[usage],
   2175 		.extent                = {image->width, image->height, 1},
   2176 		.mipLevels             = image->mip_map_levels,
   2177 		.arrayLayers           = 1,
   2178 		.samples               = image->samples,
   2179 		.tiling                = VK_IMAGE_TILING_OPTIMAL,
   2180 		.usage                 = usage_flags,
   2181 		// NOTE(rnp): needed if multiple queue families are accessed
   2182 		.sharingMode           = VK_SHARING_MODE_EXCLUSIVE,
   2183 		.queueFamilyIndexCount = 1,
   2184 		.pQueueFamilyIndices   = &queue_family,
   2185 		.initialLayout         = VK_IMAGE_LAYOUT_UNDEFINED,
   2186 	};
   2187 
   2188 	VkExternalMemoryImageCreateInfo external_memory_image_create_info = {
   2189 		.sType       = VK_STRUCTURE_TYPE_EXTERNAL_MEMORY_IMAGE_CREATE_INFO,
   2190 		.handleTypes = OS_WINDOWS ? VK_EXTERNAL_MEMORY_HANDLE_TYPE_OPAQUE_WIN32_BIT
   2191 		                          : VK_EXTERNAL_MEMORY_HANDLE_TYPE_OPAQUE_FD_BIT,
   2192 	};
   2193 
   2194 	if (export) image_create_info.pNext = &external_memory_image_create_info;
   2195 
   2196 	vkCreateImage(vk->device, &image_create_info, 0, &vi->image);
   2197 
   2198 	VkMemoryRequirements memory_requirements;
   2199 	vkGetImageMemoryRequirements(vk->device, vi->image, &memory_requirements);
   2200 
   2201 	VkMemoryDedicatedAllocateInfo dedicated_allocate_info = {
   2202 		.sType  = VK_STRUCTURE_TYPE_MEMORY_DEDICATED_ALLOCATE_INFO,
   2203 		.image  = vi->image,
   2204 	};
   2205 
   2206 	if (vk_allocate_memory(&vi->memory, memory_requirements.size, VulkanMemoryKind_Device, 0, &dedicated_allocate_info, export)) {
   2207 		image->memory_size = memory_requirements.size;
   2208 		vkBindImageMemory(vk->device, vi->image, vi->memory, 0);
   2209 
   2210 		VkImageViewCreateInfo image_view_info = {
   2211 			.sType      = VK_STRUCTURE_TYPE_IMAGE_VIEW_CREATE_INFO,
   2212 			.image      = vi->image,
   2213 			.viewType   = VK_IMAGE_VIEW_TYPE_2D,
   2214 			.format     = usage_format_map[usage],
   2215 			.subresourceRange = {
   2216 				.aspectMask     = usage_image_aspect_map[usage],
   2217 				.baseMipLevel   = 0,
   2218 				.levelCount     = 1,
   2219 				.baseArrayLayer = 0,
   2220 				.layerCount     = 1,
   2221 			},
   2222 		};
   2223 		vkCreateImageView(vk->device, &image_view_info, 0, &vi->view);
   2224 
   2225 		vk_label_object(IMAGE,         vi->image,  label, str8("Image"));
   2226 		vk_label_object(IMAGE_VIEW,    vi->view,   label, str8("Image View"));
   2227 		vk_label_object(DEVICE_MEMORY, vi->memory, label, str8("Memory"));
   2228 	} else {
   2229 		vkDestroyImage(vk->device, vi->image, 0);
   2230 		vk_entity_release(e);
   2231 		zero_struct(image);
   2232 	}
   2233 }
   2234 
   2235 DEBUG_IMPORT VulkanHandle
   2236 vk_create_semaphore(OSHandle *export)
   2237 {
   2238 	VulkanEntity *e = vk_entity_allocate(VulkanEntityKind_Semaphore);
   2239 	e->as.semaphore = vk_make_semaphore(export);
   2240 	VulkanHandle result = {(u64)e};
   2241 	return result;
   2242 }
   2243 
   2244 DEBUG_IMPORT b32
   2245 gpu_host_wait_timeline(GPUTimeline timeline, u64 value, u64 timeout_ns)
   2246 {
   2247 	b32 result = 0;
   2248 	if Between(timeline, 0, GPUTimeline_Count - 1) {
   2249 		VulkanContext *vk = vulkan_context;
   2250 		VulkanQueue   *vq = vk->queues[timeline];
   2251 		VkSemaphoreWaitInfo semaphore_wait_info = {
   2252 			.sType          = VK_STRUCTURE_TYPE_SEMAPHORE_WAIT_INFO,
   2253 			.pSemaphores    = &vq->timeline_semaphore.semaphore,
   2254 			.semaphoreCount = 1,
   2255 			.pValues        = &value,
   2256 		};
   2257 		result = vkWaitSemaphores(vk->device, &semaphore_wait_info, timeout_ns) == VK_SUCCESS;
   2258 	}
   2259 	return result;
   2260 }
   2261 
   2262 DEBUG_IMPORT u64
   2263 gpu_host_signal_timeline(GPUTimeline timeline)
   2264 {
   2265 	u64 result = -1;
   2266 	if Between(timeline, 0, GPUTimeline_Count - 1) {
   2267 		VulkanContext   *vk = vulkan_context;
   2268 		VulkanQueue     *vq = vk->queues[timeline];
   2269 		VulkanSemaphore *vs = &vq->timeline_semaphore;
   2270 		result = ++vs->value;
   2271 		VkSemaphoreSignalInfo ssi = {
   2272 			.sType     = VK_STRUCTURE_TYPE_SEMAPHORE_SIGNAL_INFO,
   2273 			.semaphore = vs->semaphore,
   2274 			.value     = result,
   2275 		};
   2276 		vkSignalSemaphore(vk->device, &ssi);
   2277 	}
   2278 	return result;
   2279 }
   2280 
   2281 DEBUG_IMPORT VulkanHandle
   2282 vk_pipeline(VulkanPipelineCreateInfo *infos, u32 count, u32 push_constants_size)
   2283 {
   2284 	assert(Between(count, 1, 2));
   2285 	assert(count == 2 || infos[0].kind == VulkanShaderKind_Compute);
   2286 
   2287 	VulkanHandle result = {0};
   2288 	Temp scratch;
   2289 	DeferLoop(take_lock(&vulkan_context->arena_lock, -1), release_lock(&vulkan_context->arena_lock))
   2290 	DeferLoop(scratch = temp_begin(vulkan_context->arena), temp_end(scratch))
   2291 	{
   2292 		VulkanEntity *e = vk_entity_allocate(VulkanEntityKind_Pipeline);
   2293 		result = (VulkanHandle){(u64)e};
   2294 
   2295 		if (count == 2) e->as.pipeline = vk_graphics_pipeline_from_infos(scratch.arena, infos, count, push_constants_size);
   2296 		else            e->as.pipeline = vk_compute_pipeline_from_info(scratch.arena, infos, push_constants_size);
   2297 	}
   2298 	return result;
   2299 }
   2300 
   2301 DEBUG_IMPORT b32
   2302 vk_pipeline_valid(VulkanHandle h)
   2303 {
   2304 	b32 result = 0;
   2305 	if ValidVulkanHandle(h) {
   2306 		VulkanPipeline *vp = vk_entity_data(h.value[0], VulkanEntityKind_Pipeline);
   2307 		if (vp->stage_flags == VK_SHADER_STAGE_COMPUTE_BIT)
   2308 			result = vp->pipeline != vulkan_context->default_compute_pipeline.pipeline;
   2309 		else
   2310 			result = vp->pipeline != vulkan_context->default_graphics_pipeline.pipeline;
   2311 	}
   2312 	return result;
   2313 }
   2314 
   2315 DEBUG_IMPORT void
   2316 vk_pipeline_release(VulkanHandle h)
   2317 {
   2318 	if (vk_pipeline_valid(h)) {
   2319 		VulkanEntity *e = (VulkanEntity *)h.value[0];
   2320 		GPUTimeline timeline;
   2321 		// TODO(rnp): this is not correct, compute shaders can also appear on graphics timeline
   2322 		if (e->as.pipeline.stage_flags == VK_SHADER_STAGE_COMPUTE_BIT) timeline = GPUTimeline_Compute;
   2323 		else                                                           timeline = GPUTimeline_Graphics;
   2324 
   2325 		// NOTE(rnp): block more command buffers from being recorded
   2326 		VulkanCommandPool *vcp = vulkan_context->command_pools[timeline];
   2327 		DeferLoop(take_lock(&vcp->lock, -1), release_lock(&vcp->lock))
   2328 		{
   2329 			u32 index = (vcp->next_command_buffer_index - 1) % MaxCommandBuffersInFlight;
   2330 			gpu_host_wait_timeline(timeline, vcp->last_submission_values[index], -1ULL);
   2331 			vkDestroyPipeline(vulkan_context->device, e->as.pipeline.pipeline, 0);
   2332 			vkDestroyPipelineLayout(vulkan_context->device, e->as.pipeline.layout, 0);
   2333 
   2334 			if (&e->as.pipeline == vcp->bound_pipeline)
   2335 				vcp->bound_pipeline = 0;
   2336 		}
   2337 		vk_entity_release(e);
   2338 	}
   2339 }
   2340 
   2341 DEBUG_IMPORT GPUCommandList
   2342 gpu_command_list_begin(GPUTimeline timeline)
   2343 {
   2344 	GPUCommandList result = {0};
   2345 	if Between(timeline, 0, GPUTimeline_Count - 1) {
   2346 		VulkanContext     *vk  = vulkan_context;
   2347 		VulkanCommandPool *vcp = vk->command_pools[timeline];
   2348 
   2349 		take_lock(&vcp->lock, -1);
   2350 		VulkanEntity *e = vk_entity_allocate(VulkanEntityKind_CommandBuffer);
   2351 		result.value = (u64)e;
   2352 
   2353 		VulkanCommandBuffer *vcb = &e->as.command_buffer;
   2354 		vcb->timeline     = timeline;
   2355 		vcb->buffer_index = (vcp->next_command_buffer_index++) % MaxCommandBuffersInFlight;
   2356 
   2357 		u32 index = vcb->buffer_index;
   2358 		// TODO(rnp): probably not the best to have this here but it will likely not be hit
   2359 		b32 wait_result = gpu_host_wait_timeline(timeline, vcp->last_submission_values[index], -1ULL);
   2360 		assert(wait_result);
   2361 
   2362 		vcp->timestamp_counts[index] = 0;
   2363 
   2364 		VkCommandBufferBeginInfo buffer_begin_info = {
   2365 			.sType = VK_STRUCTURE_TYPE_COMMAND_BUFFER_BEGIN_INFO,
   2366 			.flags = VK_COMMAND_BUFFER_USAGE_ONE_TIME_SUBMIT_BIT,
   2367 		};
   2368 
   2369 		vkBeginCommandBuffer(vcp->buffers[index], &buffer_begin_info);
   2370 		vkCmdResetQueryPool(vcp->buffers[index], vcp->query_pool, index * MaxCommandBufferTimestamps,
   2371 		                    MaxCommandBufferTimestamps);
   2372 	}
   2373 	return result;
   2374 }
   2375 
   2376 DEBUG_IMPORT void
   2377 gpu_command_bind_pipeline(GPUCommandList command, VulkanHandle pipeline)
   2378 {
   2379 	if (command.value) {
   2380 		VulkanContext       *vk  = vulkan_context;
   2381 		VulkanCommandBuffer *vcb = vk_entity_data(command.value, VulkanEntityKind_CommandBuffer);
   2382 		VulkanCommandPool   *vcp = vk->command_pools[vcb->timeline];
   2383 
   2384 		VulkanPipeline *vp = 0;
   2385 		if ValidVulkanHandle(pipeline) {
   2386 			vp = vk_entity_data(pipeline.value[0], VulkanEntityKind_Pipeline);
   2387 		} else if (vcb->timeline == GPUTimeline_Compute) {
   2388 			vp = &vk->default_compute_pipeline;
   2389 		} else if (vcb->timeline == GPUTimeline_Graphics) {
   2390 			vp = &vk->default_graphics_pipeline;
   2391 		} else {
   2392 			InvalidCodePath;
   2393 		}
   2394 
   2395 		read_only local_persist VkPipelineBindPoint bind_point_lut[GPUTimeline_Count] = {
   2396 			[GPUTimeline_Graphics] = VK_PIPELINE_BIND_POINT_GRAPHICS,
   2397 			[GPUTimeline_Compute]  = VK_PIPELINE_BIND_POINT_COMPUTE,
   2398 			[GPUTimeline_Transfer] = -1,
   2399 		};
   2400 
   2401 		VkPipelineBindPoint bind_point = bind_point_lut[vcb->timeline];
   2402 		assert(bind_point != (VkPipelineBindPoint)-1);
   2403 
   2404 		VkCommandBuffer cmd = vk_command_buffer(command);
   2405 		vkCmdBindPipeline(cmd, bind_point, vp->pipeline);
   2406 		vcp->bound_pipeline = vp;
   2407 	}
   2408 }
   2409 
   2410 DEBUG_IMPORT void
   2411 gpu_command_pipeline_barrier(GPUCommandList command)
   2412 {
   2413 	if (command.value) {
   2414 		VulkanContext       *vk  = vulkan_context;
   2415 		VulkanCommandBuffer *vcb = vk_entity_data(command.value, VulkanEntityKind_CommandBuffer);
   2416 		VulkanQueue         *vq  = vk->queues[vcb->timeline];
   2417 
   2418 		VkMemoryBarrier2 memory_barrier = {
   2419 			.sType         = VK_STRUCTURE_TYPE_MEMORY_BARRIER_2,
   2420 			.srcStageMask  = vq->pipeline_stage_flags,
   2421 			.srcAccessMask = VK_ACCESS_2_MEMORY_WRITE_BIT,
   2422 			.dstStageMask  = vq->pipeline_stage_flags,
   2423 			.dstAccessMask = VK_ACCESS_2_MEMORY_READ_BIT,
   2424 		};
   2425 
   2426 		VkDependencyInfo dependency_info = {
   2427 			.sType              = VK_STRUCTURE_TYPE_DEPENDENCY_INFO,
   2428 			.pMemoryBarriers    = &memory_barrier,
   2429 			.memoryBarrierCount = 1,
   2430 		};
   2431 		vkCmdPipelineBarrier2(vk_command_buffer(command), &dependency_info);
   2432 	}
   2433 }
   2434 
   2435 DEBUG_IMPORT void
   2436 gpu_command_clear_buffer(GPUCommandList command, GPUBuffer *buffer, u64 offset, u64 size, u32 clear_word)
   2437 {
   2438 	assert((offset % 4) == 0);
   2439 	assert((size % 4) == 0);
   2440 	if (command.value) {
   2441 		VulkanBuffer *vb = vk_entity_data(buffer->handle.value, VulkanEntityKind_Buffer);
   2442 		VkCommandBuffer cmd = vk_command_buffer(command);
   2443 		vkCmdFillBuffer(cmd, vb->buffer, offset, size, clear_word);
   2444 	}
   2445 }
   2446 
   2447 DEBUG_IMPORT void
   2448 gpu_command_dispatch_compute(GPUCommandList command, uv3 dispatch)
   2449 {
   2450 	assert(dispatch.x <= U16_MAX);
   2451 	assert(dispatch.y <= U16_MAX);
   2452 	assert(dispatch.z <= U16_MAX);
   2453 	if (command.value) {
   2454 		VkCommandBuffer cmd = vk_command_buffer(command);
   2455 		vkCmdDispatch(cmd, dispatch.x, dispatch.y, dispatch.z);
   2456 	}
   2457 }
   2458 
   2459 DEBUG_IMPORT void
   2460 gpu_command_push_constants(GPUCommandList command, u32 offset, u32 size, void *values)
   2461 {
   2462 	if (command.value) {
   2463 		VulkanCommandBuffer *vcb = vk_entity_data(command.value, VulkanEntityKind_CommandBuffer);
   2464 		VulkanCommandPool   *vcp = vulkan_context->command_pools[vcb->timeline];
   2465 		VulkanPipeline      *vp  = vcp->bound_pipeline;
   2466 
   2467 		assert(vp);
   2468 
   2469 		vkCmdPushConstants(vk_command_buffer(command), vp->layout, vp->stage_flags, offset, size, values);
   2470 	}
   2471 }
   2472 
   2473 DEBUG_IMPORT void
   2474 gpu_command_timestamp(GPUCommandList command)
   2475 {
   2476 	if (command.value) {
   2477 		VulkanContext       *vk  = vulkan_context;
   2478 		VulkanCommandBuffer *vcb = vk_entity_data(command.value, VulkanEntityKind_CommandBuffer);
   2479 		VulkanCommandPool   *vcp = vk->command_pools[vcb->timeline];
   2480 
   2481 		read_only local_persist VkPipelineStageFlags2 stage_lut[GPUTimeline_Count] = {
   2482 			[GPUTimeline_Graphics] = VK_PIPELINE_STAGE_2_ALL_GRAPHICS_BIT,
   2483 			[GPUTimeline_Compute]  = VK_PIPELINE_STAGE_2_COMPUTE_SHADER_BIT,
   2484 			[GPUTimeline_Transfer] = -1,
   2485 		};
   2486 
   2487 		VkPipelineStageFlags2 stage = stage_lut[vcb->timeline];
   2488 		assert(stage != (VkPipelineStageFlags2)-1);
   2489 
   2490 		if (vcp->timestamp_counts[vcb->buffer_index] < MaxCommandBufferTimestamps) {
   2491 			u64 query_index = vcp->timestamp_counts[vcb->buffer_index]++;
   2492 			vkCmdWriteTimestamp2(vk_command_buffer(command), stage, vcp->query_pool,
   2493 			                     vcb->buffer_index * MaxCommandBufferTimestamps + query_index);
   2494 		}
   2495 	}
   2496 }
   2497 
   2498 DEBUG_IMPORT void
   2499 gpu_command_wait_timeline(GPUCommandList command, GPUTimeline timeline, u64 value)
   2500 {
   2501 	if (command.value && Between(timeline, 0, GPUTimeline_Count - 1)) {
   2502 		VulkanContext       *vk  = vulkan_context;
   2503 		VulkanCommandBuffer *vcb = vk_entity_data(command.value, VulkanEntityKind_CommandBuffer);
   2504 
   2505 		u32 wait_index = vk->queue_indices[timeline];
   2506 		vcb->in_flight_wait_values[wait_index] = Max(value, vcb->in_flight_wait_values[wait_index]);
   2507 	}
   2508 }
   2509 
   2510 DEBUG_IMPORT u64
   2511 gpu_command_list_end(GPUCommandList command, VulkanHandle wait_semaphore, VulkanHandle finished_semaphore)
   2512 {
   2513 	u64 result = -1;
   2514 	if (command.value) {
   2515 		VulkanContext       *vk  = vulkan_context;
   2516 		VulkanCommandBuffer *vcb = vk_entity_data(command.value, VulkanEntityKind_CommandBuffer);
   2517 		VulkanCommandPool   *vcp = vk->command_pools[vcb->timeline];
   2518 		VulkanQueue         *vq  = vk->queues[vcb->timeline];
   2519 		VulkanSemaphore     *vs  = &vq->timeline_semaphore;
   2520 
   2521 		vkEndCommandBuffer(vcp->buffers[vcb->buffer_index]);
   2522 
   2523 		DeferLoop(take_lock(&vq->lock, -1), release_lock(&vq->lock)) {
   2524 			VkCommandBufferSubmitInfo command_buffer_submit_info = {
   2525 				.sType         = VK_STRUCTURE_TYPE_COMMAND_BUFFER_SUBMIT_INFO,
   2526 				.commandBuffer = vcp->buffers[vcb->buffer_index],
   2527 			};
   2528 
   2529 			result = ++vs->value;
   2530 
   2531 			u32 signal_submit_info_count = 1;
   2532 			VkSemaphoreSubmitInfo signal_submit_infos[2] = {{
   2533 				.sType     = VK_STRUCTURE_TYPE_SEMAPHORE_SUBMIT_INFO,
   2534 				.semaphore = vs->semaphore,
   2535 				.value     = result,
   2536 				.stageMask = vq->pipeline_stage_flags,
   2537 			}};
   2538 
   2539 			if ValidVulkanHandle(finished_semaphore) {
   2540 				VulkanSemaphore *fs = vk_entity_data(finished_semaphore.value[0], VulkanEntityKind_Semaphore);
   2541 				signal_submit_infos[signal_submit_info_count++] = (VkSemaphoreSubmitInfo){
   2542 					.sType     = VK_STRUCTURE_TYPE_SEMAPHORE_SUBMIT_INFO,
   2543 					.semaphore = fs->semaphore,
   2544 					.stageMask = vq->pipeline_stage_flags,
   2545 				};
   2546 			}
   2547 
   2548 			u32 wait_submit_info_count = 0;
   2549 			VkSemaphoreSubmitInfo wait_submit_infos[VulkanQueueKind_Count + 1];
   2550 			for (u32 i = 0; i < vk->unique_queues; i++) {
   2551 				u32 queue_index = vk->queue_indices[i];
   2552 				if (vcb->in_flight_wait_values[queue_index] > 0) {
   2553 					VulkanQueue *q = vk->queues[queue_index];
   2554 					VkSemaphoreSubmitInfo wait_ssi = {
   2555 						.sType     = VK_STRUCTURE_TYPE_SEMAPHORE_SUBMIT_INFO,
   2556 						.semaphore = q->timeline_semaphore.semaphore,
   2557 						.value     = vcb->in_flight_wait_values[queue_index],
   2558 						.stageMask = q->pipeline_stage_flags,
   2559 					};
   2560 					wait_submit_infos[wait_submit_info_count++] = wait_ssi;
   2561 				}
   2562 			}
   2563 
   2564 			if ValidVulkanHandle(wait_semaphore) {
   2565 				VulkanSemaphore *ws = vk_entity_data(wait_semaphore.value[0], VulkanEntityKind_Semaphore);
   2566 				wait_submit_infos[wait_submit_info_count++] = (VkSemaphoreSubmitInfo){
   2567 					.sType     = VK_STRUCTURE_TYPE_SEMAPHORE_SUBMIT_INFO,
   2568 					.semaphore = ws->semaphore,
   2569 					.stageMask = vq->pipeline_stage_flags,
   2570 				};
   2571 			}
   2572 
   2573 			VkSubmitInfo2 submit_info = {
   2574 				.sType                    = VK_STRUCTURE_TYPE_SUBMIT_INFO_2,
   2575 				.commandBufferInfoCount   = 1,
   2576 				.pCommandBufferInfos      = &command_buffer_submit_info,
   2577 				.waitSemaphoreInfoCount   = wait_submit_info_count,
   2578 				.pWaitSemaphoreInfos      = wait_submit_infos,
   2579 				.signalSemaphoreInfoCount = signal_submit_info_count,
   2580 				.pSignalSemaphoreInfos    = signal_submit_infos,
   2581 			};
   2582 
   2583 			vkQueueSubmit2(vq->queue, 1, &submit_info, 0);
   2584 
   2585 			vcp->bound_pipeline = 0;
   2586 			atomic_store_u64(vcp->last_submission_values + vcb->buffer_index, result);
   2587 		}
   2588 
   2589 		release_lock(&vcp->lock);
   2590 
   2591 		vk_entity_release((VulkanEntity *)command.value);
   2592 	}
   2593 	return result;
   2594 }
   2595 
   2596 DEBUG_IMPORT void
   2597 gpu_command_begin_rendering(GPUCommandList command, GPUImage *colour, GPUImage *depth, GPUImage *resolve)
   2598 {
   2599 	if (command.value) {
   2600 		VkCommandBuffer cmd = vk_command_buffer(command);
   2601 
   2602 		assert((colour->width == depth->width) && (colour->height == depth->height));
   2603 
   2604 		VulkanImage *ci = vk_entity_data(colour->image.value[0], VulkanEntityKind_Image);
   2605 		VulkanImage *di = vk_entity_data(depth->image.value[0],  VulkanEntityKind_Image);
   2606 		VulkanImage *ri = 0;
   2607 		if (resolve) ri = vk_entity_data(resolve->image.value[0], VulkanEntityKind_Image);
   2608 
   2609 		// NOTE: Layout Transitions
   2610 		{
   2611 			u32 image_memory_barrier_count = 2;
   2612 			VkImageMemoryBarrier2 image_memory_barriers[3] = {
   2613 				{
   2614 					.sType            = VK_STRUCTURE_TYPE_IMAGE_MEMORY_BARRIER_2,
   2615 					.srcStageMask     = VK_PIPELINE_STAGE_2_TOP_OF_PIPE_BIT,
   2616 					.srcAccessMask    = 0,
   2617 					.dstStageMask     = VK_PIPELINE_STAGE_2_COLOR_ATTACHMENT_OUTPUT_BIT,
   2618 					.dstAccessMask    = VK_ACCESS_2_COLOR_ATTACHMENT_READ_BIT|VK_ACCESS_2_COLOR_ATTACHMENT_WRITE_BIT,
   2619 					.oldLayout        = VK_IMAGE_LAYOUT_UNDEFINED,
   2620 					.newLayout        = VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL,
   2621 					.image            = ci->image,
   2622 					.subresourceRange = {
   2623 						.aspectMask     = VK_IMAGE_ASPECT_COLOR_BIT,
   2624 						.baseMipLevel   = 0,
   2625 						.levelCount     = 1,
   2626 						.baseArrayLayer = 0,
   2627 						.layerCount     = 1,
   2628 					},
   2629 				},
   2630 				{
   2631 					.sType            = VK_STRUCTURE_TYPE_IMAGE_MEMORY_BARRIER_2,
   2632 					.srcStageMask     = VK_PIPELINE_STAGE_2_EARLY_FRAGMENT_TESTS_BIT|VK_PIPELINE_STAGE_2_LATE_FRAGMENT_TESTS_BIT,
   2633 					.srcAccessMask    = 0,
   2634 					.dstStageMask     = VK_PIPELINE_STAGE_2_EARLY_FRAGMENT_TESTS_BIT|VK_PIPELINE_STAGE_2_LATE_FRAGMENT_TESTS_BIT,
   2635 					.dstAccessMask    = VK_ACCESS_2_DEPTH_STENCIL_ATTACHMENT_WRITE_BIT,
   2636 					.oldLayout        = VK_IMAGE_LAYOUT_UNDEFINED,
   2637 					.newLayout        = VK_IMAGE_LAYOUT_DEPTH_STENCIL_ATTACHMENT_OPTIMAL,
   2638 					.image            = di->image,
   2639 					.subresourceRange = {
   2640 						.aspectMask     = VK_IMAGE_ASPECT_DEPTH_BIT|VK_IMAGE_ASPECT_STENCIL_BIT,
   2641 						.baseMipLevel   = 0,
   2642 						.levelCount     = 1,
   2643 						.baseArrayLayer = 0,
   2644 						.layerCount     = 1,
   2645 					},
   2646 				},
   2647 			};
   2648 
   2649 			if (resolve) image_memory_barriers[image_memory_barrier_count++] = (VkImageMemoryBarrier2){
   2650 				.sType            = VK_STRUCTURE_TYPE_IMAGE_MEMORY_BARRIER_2,
   2651 				.srcStageMask     = VK_PIPELINE_STAGE_2_TOP_OF_PIPE_BIT,
   2652 				.srcAccessMask    = 0,
   2653 				.dstStageMask     = VK_PIPELINE_STAGE_2_COLOR_ATTACHMENT_OUTPUT_BIT|VK_PIPELINE_STAGE_2_RESOLVE_BIT,
   2654 				.dstAccessMask    = VK_ACCESS_2_COLOR_ATTACHMENT_READ_BIT|VK_ACCESS_2_COLOR_ATTACHMENT_WRITE_BIT,
   2655 				.oldLayout        = VK_IMAGE_LAYOUT_UNDEFINED,
   2656 				.newLayout        = VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL,
   2657 				.image            = ri->image,
   2658 				.subresourceRange = {
   2659 					.aspectMask     = VK_IMAGE_ASPECT_COLOR_BIT,
   2660 					.baseMipLevel   = 0,
   2661 					.levelCount     = 1,
   2662 					.baseArrayLayer = 0,
   2663 					.layerCount     = 1,
   2664 				},
   2665 			};
   2666 
   2667 			VkDependencyInfo dependency_info = {
   2668 				.sType                   = VK_STRUCTURE_TYPE_DEPENDENCY_INFO,
   2669 				.imageMemoryBarrierCount = image_memory_barrier_count,
   2670 				.pImageMemoryBarriers    = image_memory_barriers,
   2671 			};
   2672 
   2673 			vkCmdPipelineBarrier2(cmd, &dependency_info);
   2674 		}
   2675 
   2676 		VkRenderingAttachmentInfo colour_attachment = {
   2677 			.sType              = VK_STRUCTURE_TYPE_RENDERING_ATTACHMENT_INFO,
   2678 			.imageView          = ci->view,
   2679 			.imageLayout        = VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL,
   2680 			.resolveMode        = ri ? VK_RESOLVE_MODE_AVERAGE_BIT : 0,
   2681 			.resolveImageView   = ri ? ri->view : 0,
   2682 			.resolveImageLayout = ri ? VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL : 0,
   2683 			.loadOp             = VK_ATTACHMENT_LOAD_OP_CLEAR,
   2684 			.storeOp            = VK_ATTACHMENT_STORE_OP_STORE,
   2685 			.clearValue         = {.color = {{0.0f, 0.0f, 0.0f, 0.0f}}},
   2686 		};
   2687 
   2688 		VkRenderingAttachmentInfo depth_stencil_attachment = {
   2689 			.sType       = VK_STRUCTURE_TYPE_RENDERING_ATTACHMENT_INFO,
   2690 			.imageView   = di->view,
   2691 			.imageLayout = VK_IMAGE_LAYOUT_DEPTH_STENCIL_ATTACHMENT_OPTIMAL,
   2692 			.loadOp      = VK_ATTACHMENT_LOAD_OP_CLEAR,
   2693 			.storeOp     = VK_ATTACHMENT_STORE_OP_STORE,
   2694 			.clearValue  = {.depthStencil = {1.0f, 0}},
   2695 		};
   2696 
   2697 		VkRenderingInfo rendering_info = {
   2698 			.sType                = VK_STRUCTURE_TYPE_RENDERING_INFO,
   2699 			.renderArea           = {.offset = {0}, .extent = {colour->width, colour->height}},
   2700 			.layerCount           = 1,
   2701 			.colorAttachmentCount = 1,
   2702 			.pColorAttachments    = &colour_attachment,
   2703 			.pDepthAttachment     = &depth_stencil_attachment,
   2704 			.pStencilAttachment   = &depth_stencil_attachment,
   2705 		};
   2706 
   2707 		vkCmdBeginRendering(cmd, &rendering_info);
   2708 	}
   2709 }
   2710 
   2711 DEBUG_IMPORT void
   2712 gpu_command_draw(GPUCommandList command, GPUBuffer *model)
   2713 {
   2714 	if (command.value && model->handle.value) {
   2715 		VkCommandBuffer cmd = vk_command_buffer(command);
   2716 		VulkanBuffer   *vb  = vk_entity_data(model->handle.value, VulkanEntityKind_RenderModel);
   2717 		vkCmdBindIndexBuffer2(cmd, vb->buffer, 0, vk_index_size(vb->index_type) * model->index_count, vb->index_type);
   2718 		vkCmdDrawIndexed(cmd, model->index_count, 1, 0, 0, 0);
   2719 	}
   2720 }
   2721 
   2722 DEBUG_IMPORT void
   2723 gpu_command_scissor(GPUCommandList command, u32 width, u32 height, u32 x_offset, u32 y_offset)
   2724 {
   2725 	if (command.value) {
   2726 		VkCommandBuffer cmd = vk_command_buffer(command);
   2727 		VkRect2D scissor = {.offset = {x_offset, y_offset}, .extent = {width, height}};
   2728 		vkCmdSetScissor(cmd, 0, 1, &scissor);
   2729 	}
   2730 }
   2731 
   2732 DEBUG_IMPORT void
   2733 gpu_command_viewport(GPUCommandList command, f32 width, f32 height, f32 x_offset, f32 y_offset, f32 min_depth, f32 max_depth)
   2734 {
   2735 	if (command.value) {
   2736 		VkCommandBuffer cmd = vk_command_buffer(command);
   2737 		VkViewport viewport = {x_offset, y_offset, width, height, min_depth, max_depth};
   2738 		vkCmdSetViewport(cmd, 0, 1, &viewport);
   2739 	}
   2740 }
   2741 
   2742 DEBUG_IMPORT void
   2743 gpu_command_end_rendering(GPUCommandList command)
   2744 {
   2745 	if (command.value) vkCmdEndRendering(vk_command_buffer(command));
   2746 }
   2747 
   2748 DEBUG_IMPORT void
   2749 gpu_command_copy_buffer(GPUCommandList command, GPUBuffer *restrict destination,
   2750                         GPUBuffer *restrict source, u64 source_offset, i64 size)
   2751 {
   2752 	if (command.value && destination->handle.value && source->handle.value) {
   2753 		VkCommandBuffer cmd = vk_command_buffer(command);
   2754 		VulkanBuffer *db = vk_entity_data(destination->handle.value, VulkanEntityKind_Buffer);
   2755 		VulkanBuffer *sb = vk_entity_data(source->handle.value,      VulkanEntityKind_Buffer);
   2756 
   2757 		VkBufferCopy2 buffer_copy = {
   2758 			.sType     = VK_STRUCTURE_TYPE_BUFFER_COPY_2,
   2759 			.srcOffset = source_offset,
   2760 			.dstOffset = 0,
   2761 			.size      = size,
   2762 		};
   2763 
   2764 		VkCopyBufferInfo2 copy_buffer_info = {
   2765 			.sType       = VK_STRUCTURE_TYPE_COPY_BUFFER_INFO_2,
   2766 			.srcBuffer   = sb->buffer,
   2767 			.dstBuffer   = db->buffer,
   2768 			.regionCount = 1,
   2769 			.pRegions    = &buffer_copy,
   2770 		};
   2771 
   2772 		vkCmdCopyBuffer2(cmd, &copy_buffer_info);
   2773 	}
   2774 }
   2775 
   2776 DEBUG_IMPORT u64 *
   2777 gpu_read_timestamps(GPUTimeline timeline, u64 *count, Arena *arena)
   2778 {
   2779 	u64 *result = 0;
   2780 	if Between(timeline, 0, GPUTimeline_Count - 1) {
   2781 		VulkanContext     *vk  = vulkan_context;
   2782 		VulkanCommandPool *vcp = vk->command_pools[timeline];
   2783 		DeferLoop(take_lock(&vcp->lock, -1), release_lock(&vcp->lock))
   2784 		{
   2785 			u32 index = (vcp->next_command_buffer_index - 1) % MaxCommandBuffersInFlight;
   2786 			*count = vcp->timestamp_counts[index];
   2787 			if (*count > 0) {
   2788 				result = push_array(arena, u64, *count);
   2789 				gpu_host_wait_timeline(timeline, vcp->last_submission_values[index], -1ULL);
   2790 
   2791 				vkGetQueryPoolResults(vk->device, vcp->query_pool, index * MaxCommandBufferTimestamps, *count,
   2792 				                      *count * sizeof(u64), result, 8, VK_QUERY_RESULT_64_BIT|VK_QUERY_RESULT_WAIT_BIT);
   2793 			}
   2794 		}
   2795 	}
   2796 	return result;
   2797 }