Added image loading

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

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_