Added image loading

Added some string functions and macros
Added path listing on windows
Added assets

code/core/arena.h

@@ -1,7 +1,7 @@
 #if !defined(LD_CORE_ARENA_H_)
 #define LD_CORE_ARENA_H_
 
-#define AlignUp(x, a) (((x) + ~((a) - 1)) & ~((a) - 1))
+#define AlignUp(x, a) (((x) + ((a) - 1)) & ~((a) - 1))
 #define AlignDown(x, a) (((x)) & ~((a) - 1))
 
 #define KB(x) ((U64) (x) << 10)

code/core/core.c

@@ -1 +1,2 @@
 #include "impl/arena.c"
+#include "impl/string.c"

code/core/core.h

@@ -5,5 +5,6 @@
 #include "platform.h"
 #include "macros.h"
 #include "arena.h"
+#include "string.h"
 
 #endif  // LD_CORE_CORE_H_

code/core/impl/string.c

@@ -0,0 +1,150 @@
+Str8 Str8_Wrap(S64 count, U8 *data) {
+	Str8 result;
+	result.data  = data;
+	result.count = count;
+
+	return result;
+}
+
+Str8 Str8_WrapRange(U8 *start, U8 *end) {
+	Str8 result;
+	result.data  = start;
+	result.count = cast(S64) (end - start);
+
+	return result;
+}
+
+internal S64 Str8_CountZ(U8 *data) {
+	S64 result = 0;
+	while (data[result] != 0) { result += 1; }
+
+	return result;
+}
+
+Str8 Str8_WrapZ(U8 *data) {
+	Str8 result;
+	result.data  = data;
+	result.count = Str8_CountZ(data);
+
+	return result;
+}
+
+Str8 Str8_Copy(M_Arena *arena, Str8 s) {
+	Str8 result;
+	result.count = s.count;
+	result.data  = M_ArenaPush(arena, U8, .count = s.count + 1);
+
+	M_CopySize(result.data, s.data, s.count);
+	return result;
+}
+
+Str8 Str8_Format(M_Arena *arena, const char *format, ...) {
+	va_list args;
+	va_start(args, format);
+
+	Str8 result = Str8_FormatArgs(arena, format, args);
+	va_end(args);
+
+	return result;
+}
+
+internal S64 Str8_ProcessFormat(Str8 out, const char *format, va_list args) {
+	S64 result = vsnprintf((char *) out.data, (int) out.count, format, args);
+	return result;
+}
+
+Str8 Str8_FormatArgs(M_Arena *arena, const char *format, va_list args) {
+	Str8 result;
+
+	va_list copy;
+	va_copy(copy, args);
+
+	U64 offset = M_ArenaOffset(arena);
+
+	result.count = KB(1);
+	result.data  = M_ArenaPush(arena, U8, .count = result.count);
+
+	S64 needed = Str8_ProcessFormat(result, format, args);
+	if (needed >= result.count) {
+		M_ArenaPop(arena, offset);
+
+		result.count = needed;
+		result.data  = M_ArenaPush(arena, U8, .count = result.count + 1);
+
+		Str8_ProcessFormat(result, format, copy);
+	}
+	else {
+		U64 size = result.count - needed - 1;
+		M_ArenaPopSize(arena, size);
+
+		result.count = needed;
+	}
+
+	return result;
+}
+
+B32 Str8_Equal(Str8 a, Str8 b, Str8_EqualFlags flags) {
+	B32 result = (a.count == b.count);
+
+	if (result) {
+		B32 ignore_case = (flags & STR8_EQUAL_IGNORE_CASE) != 0;
+
+		for (S64 it = 0; it < a.count; ++it) {
+			U8 ac = ignore_case ? Chr_ToLowercase(a.data[it]) : a.data[it];
+			U8 bc = ignore_case ? Chr_ToLowercase(b.data[it]) : b.data[it];
+
+			if (ac != bc) {
+				result = false;
+				break;
+			}
+		}
+	}
+
+	return result;
+}
+
+Str8 Str8_Prefix(Str8 s, S64 count) {
+	Str8 result;
+	result.data  = s.data;
+	result.count = Min(s.count, count);
+
+	return result;
+}
+
+Str8 Str8_Suffix(Str8 s, S64 count) {
+	Str8 result;
+	result.count = Min(s.count, count);
+	result.data  = s.data + (s.count - result.count);
+
+	return result;
+}
+
+Str8 Str8_RemoveAfterLast(Str8 s, U8 c) {
+	Str8 result;
+	result.data  = s.data;
+	result.count = s.count;
+
+	for (S64 it = s.count - 1; it >= 0; --it) {
+		if (result.data[it] == c) {
+			result.count = it;
+			break;
+		}
+	}
+
+	return result;
+}
+
+B32 Str8_EndsWith(Str8 s, Str8 suffix) {
+	B32 result = Str8_Equal(Str8_Suffix(s, suffix.count), suffix, 0);
+	return result;
+}
+
+U8 Chr_ToUppercase(U8 c) {
+	U8 result = (c >= 'a' && c <= 'z') ? (c - ('a' - 'A')) : c;
+	return result;
+}
+
+U8 Chr_ToLowercase(U8 c) {
+	U8 result = (c >= 'A' && c <= 'Z') ? (c + ('a' - 'A')) : c;
+	return result;
+}

code/core/macros.h

@@ -34,6 +34,8 @@
 #define SLL_PushN(h, n, next) ((n)->next = (h), (h) = (n))
 #define SLL_PopN(h, next) (((h) != 0) ? (h) = (h)->next : 0)
 
+#define SLL_Enqueue(h, t, n) SLL_EnqueueN(h, t, n, next)
+
 #define function      static
 #define internal      static
 #define global_var    static

code/core/string.h

@@ -0,0 +1,36 @@
+#if !defined(LD_CORE_STRING_H_)
+#define LD_CORE_STRING_H_
+
+#define S(x) Str8_Wrap(sizeof(x) - sizeof(*(x)), (U8 *) (x))
+#define Sz(x) Str8_WrapZ((U8 *) (x))
+
+#define Sv(x) (int) (x).count, (x).data
+#define Sf(arena, fmt, ...) Str8_Format(arena, fmt, ##__VA_ARGS__)
+
+function Str8 Str8_Wrap(S64 count, U8 *data);
+function Str8 Str8_WrapRange(U8 *start, U8 *end);
+function Str8 Str8_WrapZ(U8 *data);
+
+function Str8 Str8_Copy(M_Arena *arena, Str8 s);
+
+function Str8 Str8_Format(M_Arena *arena, const char *format, ...);
+function Str8 Str8_FormatArgs(M_Arena *arena, const char *format, va_list args);
+
+typedef U32 Str8_EqualFlags;
+enum {
+	STR8_EQUAL_IGNORE_CASE = (1 << 0)
+};
+
+function B32 Str8_Equal(Str8 a, Str8 b, Str8_EqualFlags flags);
+
+function Str8 Str8_Prefix(Str8 s, S64 count);
+function Str8 Str8_Suffix(Str8 s, S64 count);
+
+function Str8 Str8_RemoveAfterLast(Str8 s, U8 c);
+
+function B32 Str8_EndsWith(Str8 s, Str8 suffix);
+
+function U8 Chr_ToUppercase(U8 c);
+function U8 Chr_ToLowercase(U8 c);
+
+#endif  // LD_CORE_STRING_H_

code/first.c

@@ -2,11 +2,16 @@
 #include <stdbool.h>
 #include <SDL3/SDL.h>
 
+#define STB_IMAGE_IMPLEMENTATION 1
+#include <stb_image.h>
+
 #include "core/core.h"
 #include "os/core.h"
 
 #include "vulkan/core.h"
 
+#include "game/core.h"
+
 int main(int argc, char **argv) {
 	(void) argc;
 	(void) argv;
@@ -24,6 +29,10 @@ int main(int argc, char **argv) {
 
 	Vk_Setup(window);
 
+
+	M_Arena *garena = M_ArenaAlloc(GB(64), .initial = MB(4));
+	G_ImagesLoad(garena);
+
 	bool running = true;
 	while (running) {
 		SDL_Event e;
@@ -74,3 +83,4 @@ int main(int argc, char **argv) {
 #include "core/core.c"
 #include "os/core.c"
 #include "vulkan/core.c"
+#include "game/core.c"

code/game/core.c

@@ -0,0 +1,119 @@
+
+void G_ImagesLoad(M_Arena *arena) {
+	M_TempScope(1, &arena) {
+		FS_List assets = FS_PathList(temp.arena, S("assets"));
+
+		Vk_Buffer staging = Vk_BufferCreate(MB(256), true  /* host_visible */);
+
+		U8 *base   = staging.data;
+		U64 offset = 0;
+
+		Vk_CommandBuffer *cmds = Vk_CommandBufferPush();
+
+		U32 n_images = 0;
+
+		for (FS_Entry *it = assets.first; it != 0; it = it->next) {
+			if (Str8_EndsWith(it->basename, S("png"))) {
+				n_images += 1;
+			}
+		}
+
+		VkBufferImageCopy copy = { 0 };
+		G_Image *images = M_ArenaPush(arena, G_Image, .count = n_images);
+		n_images = 0;
+
+		// Image upload is sbi_load -> copy to staging -> upload to gpu texture
+
+		for (FS_Entry *it = assets.first; it != 0; it = it->next) {
+			if (Str8_EndsWith(it->basename, S("png"))) {
+				S32 w, h, c;
+				stbi_uc *data = stbi_load((const char *) it->path.data, &w, &h, &c, 4);
+
+				if (data) {
+					G_Image *image = &images[n_images];
+
+					U64 image_sz = 4 * w * h;
+
+					M_CopySize(base, data, image_sz);
+
+					copy.bufferOffset      = offset;
+					copy.bufferRowLength   = 0;
+					copy.bufferImageHeight = 0;
+
+					copy.imageSubresource.aspectMask     = VK_IMAGE_ASPECT_COLOR_BIT;
+					copy.imageSubresource.mipLevel       = 0;
+					copy.imageSubresource.baseArrayLayer = 0;
+					copy.imageSubresource.layerCount     = 1;
+
+					copy.imageExtent.width  = w;
+					copy.imageExtent.height = h;
+					copy.imageExtent.depth  = 1;
+
+					base   += image_sz;
+					offset += image_sz;
+
+					Assert(offset <= staging.size);
+
+					n_images += 1;
+
+					image->name = Str8_Copy(arena, Str8_RemoveAfterLast(it->basename, '.'));
+
+					image->image.width  = w;
+					image->image.height = h;
+
+					image->image.format = VK_FORMAT_R8G8B8A8_SRGB;
+					image->image.usage  = VK_IMAGE_USAGE_SAMPLED_BIT;
+
+					Vk_ImageCreate(&image->image);
+
+					VkImageMemoryBarrier2 transfer = { 0 };
+					VkImageMemoryBarrier2 shader_read = { 0 };
+
+					transfer.sType         = VK_STRUCTURE_TYPE_IMAGE_MEMORY_BARRIER_2;
+					transfer.srcStageMask  = VK_PIPELINE_STAGE_2_NONE;
+					transfer.srcAccessMask = VK_ACCESS_2_NONE;
+					transfer.dstStageMask  = VK_PIPELINE_STAGE_2_TRANSFER_BIT;
+					transfer.dstAccessMask = VK_ACCESS_2_TRANSFER_WRITE_BIT;
+					transfer.oldLayout     = VK_IMAGE_LAYOUT_UNDEFINED;
+					transfer.newLayout     = VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL;
+					transfer.image         = image->image.handle;
+
+					transfer.subresourceRange.aspectMask = VK_IMAGE_ASPECT_COLOR_BIT;
+					transfer.subresourceRange.layerCount = 1;
+					transfer.subresourceRange.levelCount = 1;
+
+					shader_read.sType         = VK_STRUCTURE_TYPE_IMAGE_MEMORY_BARRIER_2;
+					shader_read.srcStageMask  = VK_PIPELINE_STAGE_2_TRANSFER_BIT;
+					shader_read.srcAccessMask = VK_ACCESS_2_TRANSFER_WRITE_BIT;
+					shader_read.dstStageMask  = VK_PIPELINE_STAGE_2_FRAGMENT_SHADER_BIT;
+					shader_read.dstAccessMask = VK_ACCESS_2_SHADER_SAMPLED_READ_BIT;
+					shader_read.oldLayout     = VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL;
+					shader_read.newLayout     = VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL;
+					shader_read.image         = image->image.handle;
+
+					shader_read.subresourceRange.aspectMask = VK_IMAGE_ASPECT_COLOR_BIT;
+					shader_read.subresourceRange.layerCount = 1;
+					shader_read.subresourceRange.levelCount = 1;
+
+					VkDependencyInfo dep = { 0 };
+					dep.sType = VK_STRUCTURE_TYPE_DEPENDENCY_INFO;
+
+					dep.imageMemoryBarrierCount = 1;
+					dep.pImageMemoryBarriers    = &transfer;
+
+					vk.CmdPipelineBarrier2(cmds->handle, &dep);
+
+					vk.CmdCopyBufferToImage(cmds->handle, staging.handle, image->image.handle, VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL, 1, &copy);
+
+					dep.pImageMemoryBarriers = &shader_read;
+
+					vk.CmdPipelineBarrier2(cmds->handle, &dep);
+
+					stbi_image_free(data);
+				}
+			}
+		}
+
+		Vk_CommandBufferSubmit(cmds, true /* wait */);
+	}
+}

code/game/core.h

@@ -0,0 +1,16 @@
+#if !defined(LD_GAME_CORE_H_)
+#define LD_GAME_CORE_H_
+
+typedef struct G_Image G_Image;
+struct G_Image {
+	Vk_Image image;
+
+	Str8 name;
+
+	U32 width;
+	U32 height;
+};
+
+function void G_ImagesLoad(M_Arena *arena);
+
+#endif  // LD_GAME_CORE_H_

code/os/filesystem.h

@@ -13,4 +13,33 @@ function void      FS_FileClose(OS_Handle file);
 function void FS_FileRead(OS_Handle file, void *ptr, U64 size, U64 offset);
 function void FS_FileWrite(OS_Handle file, void *ptr, U64 size, U64 offset);
 
+typedef U32 FS_EntryType;
+enum {
+	FS_ENTRY_TYPE_FILE = 0,
+	FS_ENTRY_TYPE_DIR
+};
+
+typedef struct FS_Entry FS_Entry;
+struct FS_Entry {
+	FS_Entry *next;
+
+	FS_EntryType type;
+
+	Str8 path;
+	Str8 basename;
+
+	U64 time;
+	U64 size;
+};
+
+typedef struct FS_List FS_List;
+struct FS_List {
+	FS_Entry *first;
+	FS_Entry *last;
+
+	U32 count;
+};
+
+function FS_List FS_PathList(M_Arena *arena, Str8 path);
+
 #endif  // LD_OS_FILESYSTEM_H_

code/os/impl/windows/core.c

@@ -14,6 +14,19 @@ internal Str8 Win32_WideStr(M_Arena *arena, Str8 v) {
 	return result;
 }
 
+internal Str8 Win32_MultiByteStr(M_Arena *arena, LPWSTR wstr) {
+	Str8 result = { 0 };
+
+	S32 nbytes = WideCharToMultiByte(CP_UTF8, 0, wstr, -1, 0, 0, 0, 0);
+
+	result.count = nbytes - 1;
+	result.data  = M_ArenaPush(arena, U8, .count = nbytes);
+
+	WideCharToMultiByte(CP_UTF8, 0, wstr, -1, (LPSTR) result.data, nbytes, 0, 0);
+
+	return result;
+}
+
 // Virtual memory
 
 U64 VM_PageSize() {

code/os/impl/windows/filesystem.c

@@ -83,4 +83,39 @@ void FS_FileWrite(OS_Handle file, void *ptr, U64 size, U64 offset) {
 	}
 }
 
+FS_List FS_PathList(M_Arena *arena, Str8 path) {
+	FS_List result = { 0 };
 
+	M_TempScope(1, &arena) {
+		Str8 wpath = Win32_WideStr(temp.arena, Sf(temp.arena, "%.*s\\*", Sv(path)));
+
+		WIN32_FIND_DATAW find = { 0 };
+		HANDLE hFind = FindFirstFileW((LPCWSTR) wpath.data, &find);
+
+		while (hFind != INVALID_HANDLE_VALUE) {
+			if (find.cFileName[0] != L'.') {
+				FS_Entry *entry = M_ArenaPush(arena, FS_Entry);
+
+				entry->type = (find.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) ? FS_ENTRY_TYPE_DIR : FS_ENTRY_TYPE_FILE;
+
+				entry->basename = Win32_MultiByteStr(arena, find.cFileName);
+				entry->path     = Sf(arena, "%.*s/%.*s", Sv(path), Sv(entry->basename));
+
+				FILETIME *wt = &find.ftLastWriteTime;
+
+				entry->time = ((U64) wt->dwHighDateTime << 32) | ((U64) wt->dwLowDateTime);
+				entry->size = ((U64) find.nFileSizeHigh << 32) | ((U64) find.nFileSizeLow);
+
+				SLL_Enqueue(result.first, result.last, entry);
+
+				result.count += 1;
+			}
+
+			if (!FindNextFileW(hFind, &find)) {
+				break;
+			}
+		}
+	}
+
+	return result;
+}

code/vulkan/core.c

@@ -330,6 +330,7 @@ bool Vk_Setup(SDL_Window *window) {
 
 		VkResult err = vk.CreateCommandPool(vk.device, &pool, 0, &frame->pool);
 
+		// Base command buffer
 		VkCommandBufferAllocateInfo alloc = { 0 };
 		alloc.sType              = VK_STRUCTURE_TYPE_COMMAND_BUFFER_ALLOCATE_INFO;
 		alloc.commandBufferCount = 1;
@@ -338,16 +339,26 @@ bool Vk_Setup(SDL_Window *window) {
 
 		vk.AllocateCommandBuffers(vk.device, &alloc, &frame->cmd);
 
-		VkSemaphoreCreateInfo semaphore = { 0 };
-		semaphore.sType = VK_STRUCTURE_TYPE_SEMAPHORE_CREATE_INFO;
+		// Scratch command buffers
+		VkCommandBuffer scratch[VK_NUM_SCRATCH];
+		alloc.commandBufferCount = VK_NUM_SCRATCH;
 
-		err = Min(vk.CreateSemaphore(vk.device, &semaphore, 0, &frame->acquire),  err);
-		err = Min(vk.CreateSemaphore(vk.device, &semaphore, 0, &frame->complete), err);
+		vk.AllocateCommandBuffers(vk.device, &alloc, scratch);
 
 		VkFenceCreateInfo fence = { 0 };
 		fence.sType = VK_STRUCTURE_TYPE_FENCE_CREATE_INFO;
 		fence.flags = VK_FENCE_CREATE_SIGNALED_BIT;
 
+		for (U32 s = 0; s < VK_NUM_SCRATCH; ++s) {
+			frame->scratch[s].handle = scratch[s];
+			err = Min(vk.CreateFence(vk.device, &fence, 0, &frame->scratch[s].fence), err);
+		}
+
+		VkSemaphoreCreateInfo semaphore = { 0 };
+		semaphore.sType = VK_STRUCTURE_TYPE_SEMAPHORE_CREATE_INFO;
+
+		err = Min(vk.CreateSemaphore(vk.device, &semaphore, 0, &frame->acquire),  err);
+		err = Min(vk.CreateSemaphore(vk.device, &semaphore, 0, &frame->complete), err);
 		err = Min(vk.CreateFence(vk.device, &fence, 0, &frame->fence), err);
 
 		vk.err = err;
@@ -450,3 +461,137 @@ void Vk_FrameEnd() {
 
 	vk.n_frames += 1;
 }
+
+Vk_CommandBuffer *Vk_CommandBufferPush() {
+	Vk_Frame *frame = &vk.frames[vk.n_frames % vk.in_flight];
+
+	// If this scratch buffer is still in use wait for it to finish, this is _bad_ but we
+	// shouldn't hit this
+	U32 idx = frame->next_scratch & (VK_NUM_SCRATCH - 1);
+
+	Vk_CommandBuffer *result = &frame->scratch[idx];
+
+	vk.WaitForFences(vk.device, 1, &result->fence, VK_TRUE, U64_MAX);
+	vk.ResetFences(vk.device, 1, &result->fence);
+
+	VkCommandBufferBeginInfo begin_info = { 0 };
+	begin_info.sType = VK_STRUCTURE_TYPE_COMMAND_BUFFER_BEGIN_INFO;
+
+	vk.BeginCommandBuffer(result->handle, &begin_info);
+
+	return result;
+}
+
+void Vk_CommandBufferSubmit(Vk_CommandBuffer *cmds, B32 wait) {
+	vk.EndCommandBuffer(cmds->handle);
+
+	VkSubmitInfo submit_info = { 0 };
+	submit_info.sType                = VK_STRUCTURE_TYPE_SUBMIT_INFO;
+	submit_info.commandBufferCount   = 1;
+	submit_info.pCommandBuffers      = &cmds->handle;
+
+	vk.QueueSubmit(vk.queue.handle, 1, &submit_info, cmds->fence);
+
+	if (wait) {
+		vk.DeviceWaitIdle(vk.device);
+	}
+}
+
+#define VK_HOST_VISIBLE_FLAGS (VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT | VK_MEMORY_PROPERTY_HOST_COHERENT_BIT)
+
+internal VkDeviceMemory Vk_Allocate(VkMemoryRequirements *mreq, VkMemoryPropertyFlags usage) {
+	VkDeviceMemory result = VK_NULL_HANDLE;
+
+	VkPhysicalDeviceMemoryProperties2 _props = { 0 };
+	_props.sType = VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_MEMORY_PROPERTIES_2;
+
+	vk.GetPhysicalDeviceMemoryProperties2(vk.gpu, &_props);
+
+	// ?????
+	VkPhysicalDeviceMemoryProperties *props = &_props.memoryProperties;
+
+	U32 type_index = U32_MAX;
+
+	for (U32 it = 0; it < props->memoryTypeCount; ++it) {
+		VkMemoryType *type = &props->memoryTypes[it];
+		if ((type->propertyFlags & usage) == usage) {
+			type_index = it;
+			break;
+		}
+	}
+
+	if (type_index != -1) {
+		VkMemoryAllocateInfo alloc_info = { 0 };
+		alloc_info.sType           = VK_STRUCTURE_TYPE_MEMORY_ALLOCATE_INFO;
+		alloc_info.allocationSize  = mreq->size;
+		alloc_info.memoryTypeIndex = type_index;
+
+		vk.AllocateMemory(vk.device, &alloc_info, 0, &result);
+	}
+
+	return result;
+}
+
+Vk_Buffer Vk_BufferCreate(U64 size, B32 host_visible) {
+	Vk_Buffer result = { 0 };
+
+	VkBufferCreateInfo create_info = { 0 };
+	create_info.sType = VK_STRUCTURE_TYPE_BUFFER_CREATE_INFO;
+	create_info.usage = VK_BUFFER_USAGE_TRANSFER_SRC_BIT;
+	create_info.size  = size;
+
+	vk.CreateBuffer(vk.device, &create_info, 0, &result.handle);
+
+	VkMemoryRequirements req;
+	vk.GetBufferMemoryRequirements(vk.device, result.handle, &req);
+
+	VkMemoryPropertyFlags usage = host_visible ? VK_HOST_VISIBLE_FLAGS : VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT;
+
+	result.size   = req.size;
+	result.memory = Vk_Allocate(&req, usage);
+
+	vk.BindBufferMemory(vk.device, result.handle, result.memory, 0);
+
+	if (host_visible) {
+		vk.MapMemory(vk.device, result.memory, 0, result.size, 0, &result.data);
+	}
+
+	return result;
+}
+
+void Vk_ImageCreate(Vk_Image *image) {
+	VkImageCreateInfo create_info = { 0 };
+	create_info.sType         = VK_STRUCTURE_TYPE_IMAGE_CREATE_INFO;
+	create_info.imageType     = VK_IMAGE_TYPE_2D;
+	create_info.format        = image->format;
+	create_info.extent.width  = image->width;
+	create_info.extent.height = image->height;
+	create_info.extent.depth  = 1;
+	create_info.mipLevels     = 1;
+	create_info.arrayLayers   = 1;
+	create_info.usage         = VK_IMAGE_USAGE_TRANSFER_DST_BIT | image->usage;
+	create_info.samples       = VK_SAMPLE_COUNT_1_BIT;
+	create_info.tiling        = VK_IMAGE_TILING_OPTIMAL;
+
+	vk.CreateImage(vk.device, &create_info, 0, &image->handle);
+
+	VkMemoryRequirements req;
+	vk.GetImageMemoryRequirements(vk.device, image->handle, &req);
+
+	image->size   = req.size;
+	image->memory = Vk_Allocate(&req, VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT);
+
+	vk.BindImageMemory(vk.device, image->handle, image->memory, 0);
+
+	VkImageViewCreateInfo view_info = { 0 };
+	view_info.sType    = VK_STRUCTURE_TYPE_IMAGE_VIEW_CREATE_INFO;
+	view_info.viewType = VK_IMAGE_VIEW_TYPE_2D;
+	view_info.format   = image->format;
+	view_info.image    = image->handle;
+
+	view_info.subresourceRange.aspectMask = VK_IMAGE_ASPECT_COLOR_BIT;
+	view_info.subresourceRange.levelCount = 1;
+	view_info.subresourceRange.layerCount = 1;
+
+	vk.CreateImageView(vk.device, &view_info, 0, &image->view);
+}

code/vulkan/core.h

@@ -23,6 +23,13 @@
 #define function static
 
 #define VK_MAX_FRAMES_IN_FLIGHT 8
+#define VK_NUM_SCRATCH 8
+
+typedef struct Vk_CommandBuffer Vk_CommandBuffer;
+struct Vk_CommandBuffer {
+	VkCommandBuffer handle;
+	VkFence fence;
+};
 
 typedef struct Vk_Frame Vk_Frame;
 struct Vk_Frame {
@@ -32,9 +39,35 @@ struct Vk_Frame {
 	VkSemaphore acquire, complete;
 	VkFence fence;
 
+	U32 next_scratch;
+	Vk_CommandBuffer scratch[VK_NUM_SCRATCH];
+
 	U32 image; // swapchain image index
 };
 
+typedef struct Vk_Image Vk_Image;
+struct Vk_Image {
+	VkDeviceMemory memory;
+	VkDeviceSize   size;
+
+	VkImage handle;
+	VkImageView view;
+
+	VkFormat format;
+	VkImageUsageFlags usage;
+	U32 width, height;
+};
+
+typedef struct Vk_Buffer Vk_Buffer;
+struct Vk_Buffer {
+	VkDeviceMemory memory;
+	VkDeviceSize   size;
+
+	VkBuffer handle;
+
+	void *data; // if mapped host visible memory
+};
+
 typedef struct Vk_Context Vk_Context;
 struct Vk_Context {
 	void *lib;
@@ -86,4 +119,9 @@ function bool Vk_Setup(SDL_Window *window);
 function Vk_Frame *Vk_FrameBegin(SDL_Window *window);
 function void Vk_FrameEnd();
 
+function Vk_CommandBuffer *Vk_CommandBufferPush();
+function void              Vk_CommandBufferSubmit(Vk_CommandBuffer *cmds, B32 wait);
+
+function Vk_Buffer Vk_BufferCreate(U64 size, B32 host_visible);
+
 #endif  // LD_VULKAN_CORE_H_

code/vulkan/functions.h

@@ -6,6 +6,7 @@
 	VK_FUNC(GetDeviceProcAddr);
 	VK_FUNC(GetPhysicalDeviceSurfaceCapabilitiesKHR);
 	VK_FUNC(GetPhysicalDeviceSurfaceFormatsKHR);
+	VK_FUNC(GetPhysicalDeviceMemoryProperties2);
 
 #if defined(VK_USE_PLATFORM_WIN32_KHR)
 	VK_FUNC(CreateWin32SurfaceKHR);
@@ -39,7 +40,16 @@
 	VK_FUNC(BeginCommandBuffer);
 	VK_FUNC(EndCommandBuffer);
 	VK_FUNC(DeviceWaitIdle);
+	VK_FUNC(AllocateMemory);
+	VK_FUNC(CreateBuffer);
+	VK_FUNC(GetBufferMemoryRequirements);
+	VK_FUNC(BindBufferMemory);
+	VK_FUNC(CreateImage);
+	VK_FUNC(GetImageMemoryRequirements);
+	VK_FUNC(BindImageMemory);
+	VK_FUNC(MapMemory);
 
+	VK_FUNC(CmdCopyBufferToImage);
 	VK_FUNC(CmdPipelineBarrier2);
 	VK_FUNC(CmdBeginRendering);
 	VK_FUNC(CmdEndRendering);