ref, feat: Restructure

- The renderer backend is now its own library, loaded at runtime.
- Removed GLFW dependency, instead use win32 directly.
- Broke linux window creation, because it's not implemented yet.
  - Maybe use GLFW for linux?

include/fio.h

@@ -1,60 +0,0 @@
-#ifndef VY_FIO_H
-#define VY_FIO_H
-
-#include <stdbool.h>
-#include <stddef.h>
-#include <stdint.h>
-
-#include "voyage.h"
-
-enum
-{
-    VY_FILE_BUFFER_FLAG_FILE_NOT_FOUND = 0x1,
-    VY_FILE_BUFFER_FLAG_READ_FAILED    = 0x2,
-};
-
-typedef struct {
-    void *data;
-    size_t size;
-    uint32_t flags;
-} vy_file_buffer;
-
-inline bool vyWasFileBufferSuccessful(const vy_file_buffer *fb) {
-    return fb->flags == 0;
-}
-
-/* used to identify a file (XXH3 hash of the path) */
-typedef uint64_t vy_file_id;
-
-typedef unsigned int vy_fio_handle;
-
-typedef struct {
-    unsigned int queue_size;
-    unsigned int max_file_count;
-} vy_fio_config;
-
-bool vyInitFIO(const vy_fio_config *config);
-
-void vyShutdownFIO(void);
-
-vy_file_id vyGetFileId(const char *path);
-
-vy_file_id vyGetFileIdFromSpan(vy_text_span path);
-
-vy_file_id vyAddFile(const char *path);
-
-vy_file_id vyAddFileFromSpan(vy_text_span path);
-
-const char *vyGetFilePath(vy_file_id fid);
-
-vy_fio_handle vyEnqueueRead(vy_file_id fid);
-
-void vyAbortFIO(vy_fio_handle fio);
-
-bool vyIsFIOFinished(vy_fio_handle fio);
-
-bool vyRetrieveReadBuffer(vy_fio_handle fio, vy_file_buffer *buffer);
-
-void vyFreeFileBuffer(vy_file_buffer buffer);
-
-#endif

include/gfx_backend.h

@@ -1,29 +0,0 @@
-#ifndef VY_GFX_BACKEND_H
-#define VY_GFX_BACKEND_H
-
-/* Backend functions and types. */
-
-#include <stddef.h>
-
-#include "gfx.h"
-
-typedef struct {
-    const char *compute_source;
-    size_t compute_source_length;
-} vy_compute_pipeline_info;
-
-typedef struct {
-    const char *vertex_source;
-    size_t vertex_source_length;
-
-    const char *fragment_source;
-    size_t fragment_source_length;
-} vy_graphics_pipeline_info;
-
-vy_gfx_pipeline_id
-vyCompileComputePipeline(const vy_compute_pipeline_info *info);
-
-vy_gfx_pipeline_id
-vyCompileGraphicsPipeline(const vy_graphics_pipeline_info *info);
-
-#endif

include/threading.h

@@ -1,18 +0,0 @@
-#ifndef VY_THREADING_H
-#define VY_THREADING_H
-
-/* platform independent threading */
-
-#include <stdbool.h>
-
-typedef struct vy_mutex_s vy_mutex;
-
-vy_mutex *vyCreateMutex(void);
-
-void vyDestroyMutex(vy_mutex *mutex);
-
-bool vyLockMutex(vy_mutex *mutex);
-
-bool vyUnlockMutex(vy_mutex *mutex);
-
-#endif

meson.build

@@ -22,42 +22,64 @@ elif compiler.get_argument_syntax() == 'msvc'
 endif
 
 # Debug specific flags
-if buildtype == 'debug'
+if buildtype == 'debug' or buildtype == 'debugoptimized'
   add_project_arguments([ '-DDEBUG'], language : 'c')
 endif
 
-# "Select" renderer backend
-# Currently only OpenGL is supported
-add_project_arguments([ '-DRENDERER_GL'], language : 'c')
-
 # Gather dependencies
 thread_dep = dependency('threads')
 m_dep = compiler.find_library('m', required : false)
-glfw_proj = subproject('glfw', default_options : 'default_library=static')
+vk_dep = dependency('vulkan', required : false)
-glfw_dep = glfw_proj.get_variable('glfw_dep')
 
-incdir = include_directories(['contrib', 'include'])
+# glfw_proj = subproject('glfw', default_options : 'default_library=static')
+# glfw_dep = glfw_proj.get_variable('glfw_dep')
 
-executable('voyage',
+incdir = include_directories(['contrib', 'src'])
+
+runtime_lib = library('vyrt',
   # Project Sources
-  'include/voyage.h',
+  'src/runtime/runtime.h',
-  'include/gfx.h',
+  'src/runtime/gfx.h',
-  'include/gfx_backend.h',
+  'src/runtime/renderer_api.h',
-  'include/fio.h',
+  'src/runtime/fio.h',
-  'include/config.h',
+  'src/runtime/config.h',
-  'include/threading.h',
+  'src/runtime/threading.h',
+  'src/runtime/app.h',
+  'src/runtime/dynamic_libs.h',
 
-  'src/voyage.c',
+  'src/runtime/error_report.c',
-  'src/fio.c',
+  'src/runtime/gfx_main.c',
-  'src/error_report.c',
+  'src/runtime/gfx_shader_loading.c',
-  'src/gfx_main.c',
+  'src/runtime/config.c',
-  'src/gfx_shader_loading.c',
+  'src/runtime/runtime_cvars.c',
-  'src/gfx_pipelines.c',
+  'src/runtime/threading.c',
-  'src/config.c',
+  'src/runtime/fio.c',
-  'src/threading.c',
+  'src/runtime/app.c',
+  'src/runtime/dynamic_libs.c',
 
   # Contrib Sources
-  'contrib/glad/glad.c',
   'contrib/xxhash/xxhash.c',
-  dependencies : [thread_dep, m_dep, glfw_dep],
+  dependencies : [thread_dep, m_dep],
-  include_directories: incdir)
+  include_directories : incdir,
+  c_pch : 'pch/rt_pch.h')
+
+if vk_dep.found()
+  vk_renderer_lib = library('vyvk',
+    # Project Sources
+    'src/renderer/vk/gpu.h',
+
+    'src/renderer/vk/init.c',
+    'src/renderer/vk/gfx_pipelines.c',
+    dependencies : [m_dep, vk_dep],
+    include_directories : incdir,
+    link_with : [runtime_lib],
+    c_pch : 'pch/vk_pch.h')
+endif
+
+executable('voyage',
+  'src/game/voyage.c',
+  include_directories : incdir,
+  link_with : [runtime_lib],
+  win_subsystem : 'windows')
+
+

pch/rt_pch.h

@@ -0,0 +1 @@
+#include <Windows.h>

pch/vk_pch.h

@@ -0,0 +1 @@
+#include <vulkan/vulkan.h>

src/game/voyage.c

@@ -0,0 +1,15 @@
+#include "runtime/app.h"
+
+#ifdef _WIN32
+
+#define WIN32_LEAN_AND_MEAN
+#include <Windows.h>
+
+int WINAPI wWinMain(HINSTANCE hInstance,
+                    HINSTANCE hPrevInstance,
+                    PWSTR pCmdLine,
+                    int nCmdShow) {
+    return vyWin32Entry(hInstance, hPrevInstance, pCmdLine, nCmdShow);
+}
+
+#endif

src/gfx_main.c

@@ -1,23 +0,0 @@
-#include <glad/glad.h>
-
-#include "gfx.h"
-
-/* Attributes are used to bind buffers (or textures) to symbolic values.
- * For example, an attribute might be bound to "CELL_GRID", which would be
- * replaced with the (at the time of the invoke) grid buffer of the current
- * world cell.
- */
-
-bool vyLoadShaders(const char **paths, vy_shader *shaders, unsigned int count);
-
-bool vyInitRenderer(void) {
-    /* Init shader programs */
-    const char *shader_files[] = {"shader/cell.shader"};
-    vy_shader shaders[1];
-    if (!vyLoadShaders(shader_files, shaders, 1))
-        return false;
-    return true;
-}
-
-void vyShutdownRenderer(void) {
-}

src/renderer/vk/gfx_pipelines.c

@@ -1,11 +1,11 @@
-#include <glad/glad.h>
+#include "runtime/runtime.h"
+#include "runtime/gfx.h"
 
-#include "gfx.h"
+#include "runtime/renderer_api.h"
-#include "gfx_backend.h"
-#include "voyage.h"
 
 typedef struct {
-    GLuint prog;
+
+    unsigned int prog;
 } vy_gl_pipeline;
 
 #define NUM_SLOTS 256
@@ -52,8 +52,9 @@ static void ReleasePipelineSlot(vy_gfx_pipeline_id id) {
         _storage.generation_in_use[slot] &= ~0x1;
 }
 
-vy_gfx_pipeline_id
+VY_DLLEXPORT vy_gfx_pipeline_id
 vyCompileComputePipeline(const vy_compute_pipeline_info *info) {
+#if 0
     char info_log[512];
 
     GLuint prog   = glCreateProgram();
@@ -86,16 +87,18 @@ vyCompileComputePipeline(const vy_compute_pipeline_info *info) {
         return (vy_gfx_pipeline_id){0};
     }
     glDeleteShader(shader);
+    #endif
 
     vy_gl_pipeline pipeline;
-    pipeline.prog = prog;
+    pipeline.prog = 0;
     return StorePipeline(pipeline);
 }
 
-vy_gfx_pipeline_id
+VY_DLLEXPORT vy_gfx_pipeline_id
 vyCompileGraphicsPipeline(const vy_graphics_pipeline_info *info) {
-    char info_log[512];
 
+    #if 0
+    char info_log[512];
     GLuint prog            = glCreateProgram();
     GLuint vertex_shader   = glCreateShader(GL_VERTEX_SHADER);
     GLuint fragment_shader = glCreateShader(GL_FRAGMENT_SHADER);
@@ -148,8 +151,9 @@ vyCompileGraphicsPipeline(const vy_graphics_pipeline_info *info) {
 
     glDeleteShader(vertex_shader);
     glDeleteShader(fragment_shader);
+    #endif
 
     vy_gl_pipeline pipeline;
-    pipeline.prog = prog;
+    pipeline.prog = 0;
     return StorePipeline(pipeline);
 }

src/renderer/vk/gpu.h

@@ -0,0 +1,15 @@
+#ifndef VY_VK_GPU_H
+#define VY_VK_GPU_H
+
+#include <vulkan/vulkan.h>
+
+typedef struct {
+    VkInstance instance;
+    VkAllocationCallbacks *alloc_cb;
+} vy_vk_gpu;
+
+#ifndef VY_VK_DONT_DEFINE_GPU_GLOBAL
+extern vy_vk_gpu g_gpu;
+#endif
+
+#endif

src/renderer/vk/init.c

@@ -0,0 +1,137 @@
+#include <stdlib.h>
+#include <malloc.h>
+
+#define VY_VK_DONT_DEFINE_GPU_GLOBAL
+#include "gpu.h"
+
+#include "runtime/runtime.h"
+#include "runtime/renderer_api.h"
+#include "runtime/config.h"
+
+VY_CVAR_I(r_EnableAPIAllocTracking,
+          "Enable tracking of allocations done by the vulkan api. [0/1] Default: 0",
+          0);
+
+
+typedef struct {
+    size_t allocated;
+    size_t reallocated;
+    size_t freed;
+    size_t max_alignment;
+} vy_vk_alloc_stats;
+
+vy_vk_gpu g_gpu;
+
+static VkAllocationCallbacks _tracking_alloc_cbs;
+static vy_vk_alloc_stats _alloc_stats;
+
+static const char *AllocationScopeToString(VkSystemAllocationScope scope)
+{
+    switch (scope) {
+    case VK_SYSTEM_ALLOCATION_SCOPE_COMMAND:
+        return "COMMAND";
+    case VK_SYSTEM_ALLOCATION_SCOPE_OBJECT:
+        return "OBJECT";
+    case VK_SYSTEM_ALLOCATION_SCOPE_CACHE:
+        return "CACHE";
+    case VK_SYSTEM_ALLOCATION_SCOPE_DEVICE:
+        return "DEVICE";
+    case VK_SYSTEM_ALLOCATION_SCOPE_INSTANCE:
+        return "INSTANCE";
+    default:
+        return "UNKNOWN";
+    }
+}
+
+static void LogAllocationStats(const vy_vk_alloc_stats *stats) {
+    vyLog("vk",
+          "Allocated: %zu bytes. Reallocated: %zu bytes. Max. requested "
+          "alignment: %zu bytes",
+          stats->allocated,
+          stats->reallocated,
+          stats->max_alignment);
+}
+
+static void *TrackAllocation(void *userData, size_t size, size_t alignment, VkSystemAllocationScope scope) {
+    vy_vk_alloc_stats *stats = userData;
+    if (alignment > stats->max_alignment)
+        stats->max_alignment = alignment;
+    stats->allocated += size;
+    vyLog("vk",
+          "Allocation. Size: %zu, Alignment: %zu, Scope: %s",
+          size,
+          alignment,
+          AllocationScopeToString(scope));
+    LogAllocationStats(stats);
+    return _aligned_malloc(size, alignment);
+}
+
+static void *TrackReallocation(void *userData,
+                               void *original,
+                               size_t size,
+                               size_t alignment,
+                               VkSystemAllocationScope scope) {
+    vy_vk_alloc_stats *stats = userData;
+    if (alignment > stats->max_alignment)
+        stats->max_alignment = alignment;
+    stats->reallocated += size;
+    vyLog("vk",
+          "Reallocation. Size: %zu, Alignment: %zu, Scope: %s",
+          size,
+          alignment,
+          AllocationScopeToString(scope));
+    LogAllocationStats(stats);
+    return _aligned_realloc(original, size, alignment);
+}
+
+static void TrackFree(void *userData, void *memory) {
+    vy_vk_alloc_stats *stats = userData;
+    vyLog("vk", "Free.");
+    LogAllocationStats(stats);
+    free(memory);
+}
+
+VY_DLLEXPORT int vyInit(const vy_renderer_init_info *info) {
+    vyLog("vk", "Init");
+    
+    vyRegisterCVAR(&r_EnableAPIAllocTracking);
+
+    _tracking_alloc_cbs.pUserData = &_alloc_stats;
+    _tracking_alloc_cbs.pfnAllocation = TrackAllocation;
+    _tracking_alloc_cbs.pfnReallocation = TrackReallocation;
+    _tracking_alloc_cbs.pfnFree         = TrackFree;
+
+    if (r_EnableAPIAllocTracking.i) {
+        g_gpu.alloc_cb = &_tracking_alloc_cbs;
+    } else {
+        g_gpu.alloc_cb = NULL;
+    }
+
+    VkResult result;
+
+    VkApplicationInfo app_info = {
+        .apiVersion = VK_API_VERSION_1_0,
+        .applicationVersion = 0x00001000,
+        .engineVersion = 0x00001000,
+        .pEngineName = "voyage",
+        .pApplicationName = "Voyage",
+    };
+
+    VkInstanceCreateInfo instance_info = {
+        .sType            = VK_STRUCTURE_TYPE_INSTANCE_CREATE_INFO,
+        .pApplicationInfo = &app_info,
+    };
+    result = vkCreateInstance(&instance_info, g_gpu.alloc_cb, &g_gpu.instance);
+    if (result != VK_SUCCESS) {
+        vyReportError("vk", "Failed to create the vulkan instance!");
+        return 1;
+    }
+
+    return 0;
+}
+
+VY_DLLEXPORT void vyShutdown(void) {
+    vyLog("vk", "Shutdown");
+
+    vkDestroyInstance(g_gpu.instance, g_gpu.alloc_cb);
+}

src/runtime/app.c

@@ -0,0 +1,130 @@
+#include "app.h"
+#include "fio.h"
+#include "gfx.h"
+#include "config.h"
+#include "renderer_api.h"
+
+extern void __RegisterRuntimeCVars(void);
+
+VY_CVAR_I(rt_Fullscreen, "Show window in fullscreen mode. [0/1] Default: 0", 0);
+VY_CVAR_I(rt_WindowWidth, "Window width. Default: 1024", 1024);
+VY_CVAR_I(rt_WindowHeight, "Window height. Default: 768", 768);
+
+#ifdef _WIN32
+#define WIN32_LEAN_AND_MEAN
+#include <Windows.h>
+
+static LRESULT CALLBACK win32WndProc(HWND hWnd,
+                                     UINT uMsg,
+                                     WPARAM wParam,
+                                     LPARAM lParam) {
+    switch (uMsg) {
+    case WM_CLOSE: 
+        PostQuitMessage(0);
+        return 0;
+    default:
+        return DefWindowProcW(hWnd, uMsg, wParam, lParam);
+    }
+}
+
+VY_DLLEXPORT int vyWin32Entry(HINSTANCE hInstance,
+    HINSTANCE hPrevInstance,
+    PWSTR pCmdLine,
+    int nCmdShow) {
+
+    __RegisterRuntimeCVars();
+
+    vy_fio_config fio_config = {0};
+    if (!vyInitFIO(&fio_config)) {
+        vyReportError("FIO", "Init failed.");
+        return 1;
+    }
+
+    
+    WNDCLASSEXW wndclass = {
+        .cbSize        = sizeof(wndclass),
+        .hInstance     = hInstance,
+        .lpszClassName = L"vyWndClass",
+        .style         = CS_OWNDC,
+        .lpfnWndProc   = win32WndProc,
+    };
+    if (!RegisterClassExW(&wndclass)) {
+        vyReportError("CORE", "RegisterClassEx failed: %u", GetLastError());
+        return 1;
+    }
+
+    HWND wnd = NULL; 
+    if (rt_Fullscreen.i) {
+        /* Fullscreen window */
+        int w    = GetSystemMetrics(SM_CXSCREEN);
+        int h    = GetSystemMetrics(SM_CYSCREEN);
+        wnd      = CreateWindowExW(WS_EX_APPWINDOW,
+                              L"vyWndClass",
+                              L"Voyage",
+                              WS_POPUP,
+                              0,
+                              0,
+                              w,
+                              h,
+                              NULL,
+                              NULL,
+                              hInstance,
+                              NULL);
+        ShowWindow(wnd, SW_SHOW);
+    } else {
+        /* Windowed mode */
+        int w = rt_WindowWidth.i;
+        int h = rt_WindowHeight.i;
+        wnd   = CreateWindowExW(WS_EX_APPWINDOW,
+                              L"vyWndClass",
+                              L"Voyage",
+                              WS_OVERLAPPED | WS_CAPTION | WS_SYSMENU,
+                              CW_USEDEFAULT,
+                              CW_USEDEFAULT,
+                              w,
+                              h,
+                              NULL,
+                              NULL,
+                              hInstance,
+                              NULL);
+        ShowWindow(wnd, SW_SHOW);
+    }
+
+    if (!wnd) {
+        vyReportError("CORE",
+                      "Failed to create the game window: %u",
+                      GetLastError());
+        return 1;
+    }
+
+    vy_renderer_init_info renderer_info = {.hWnd = wnd, .hInstance = hInstance};
+    if (!vyInitGFX(&renderer_info)) {
+        vyReportError("GFX", "Init failed.");
+        return 1;
+    }
+
+    /* Main Loop */
+    bool keep_running = true;
+    while (keep_running) {
+        MSG msg;
+        while (PeekMessageW(&msg, NULL, 0, 0, PM_REMOVE)) {
+            if (msg.message == WM_QUIT) {
+                keep_running = false;
+            } else {
+                TranslateMessage(&msg);
+                DispatchMessageW(&msg);
+            }
+        }
+    }
+
+    vyShutdownGFX();
+    
+    DestroyWindow(wnd);
+    UnregisterClassW(L"vyWndClass", hInstance);
+    
+    vyShutdownFIO();
+
+    return 0;
+}
+
+#endif

src/runtime/app.h

@@ -0,0 +1,20 @@
+#ifndef VY_APP_H
+#define VY_APP_H
+
+/* Platform specific application entry point */
+
+#include "runtime.h"
+
+#ifdef _WIN32
+
+/* Forward declared here, to avoid including windows.h */
+struct HINSTANCE__;
+
+VY_DLLEXPORT int vyWin32Entry(struct HINSTANCE__ *hInstance,
+                 struct HINSTANCE__ *hPrevInstance,
+                 wchar_t *pCmdLine,
+                 int nCmdShow);
+
+#endif
+
+#endif

src/runtime/config.c

@@ -1,6 +1,6 @@
 #include "config.h"
 #include "threading.h"
-#include "voyage.h"
+#include "runtime.h"
 
 #include <stddef.h>
 #include <string.h>

src/runtime/config.h

@@ -1,6 +1,8 @@
 #ifndef VY_CONFIG_H
 #define VY_CONFIG_H
 
+#include "runtime.h"
+
 typedef enum
 {
     VY_CVAR_TYPE_INT,
@@ -36,8 +38,8 @@ typedef struct
                  .s           = (v),                                           \
                  .type        = VY_CVAR_TYPE_STRING}
 
-void vyRegisterCVAR(vy_cvar *cvar);
+VY_DLLEXPORT void vyRegisterCVAR(vy_cvar *cvar);
 
-vy_cvar *vyGetCVAR(const char *name);
+VY_DLLEXPORT vy_cvar *vyGetCVAR(const char *name);
 
 #endif

src/runtime/dynamic_libs.c

@@ -0,0 +1,43 @@
+#include "dynamic_libs.h"
+
+#ifdef _WIN32
+#define WIN32_LEAN_AND_MEAN
+#include <Windows.h>
+
+VY_DLLEXPORT vy_dynlib vyOpenLib(const char *libname) {
+    wchar_t libname_w[MAX_PATH];
+    MultiByteToWideChar(CP_UTF8,
+                        MB_PRECOMPOSED,
+                        libname,
+                        -1,
+                        libname_w,
+                        MAX_PATH);
+    HMODULE mod = LoadLibraryW(libname_w);
+    return (vy_dynlib)mod;
+}
+
+VY_DLLEXPORT void *vyGetSymbol(vy_dynlib lib, const char *symbol) {
+    return (void*)GetProcAddress((HMODULE)lib, symbol);
+}
+
+VY_DLLEXPORT void vyCloseLib(vy_dynlib lib) {
+    FreeLibrary((HMODULE)lib);
+}
+
+#elif defined(__linux__)
+#include <dlfcn.h>
+
+VY_DLLEXPORT vy_dynlib vyOpenLib(const char *libname) {
+    return dlopen(libname, RTLD_NOW | RTLD_LOCAL);
+}
+
+VY_DLLEXPORT void *vyGetSymbol(vy_dynlib lib, const char *symbol) {
+    return dlsym(lib, symbol);
+}
+
+VY_DLLEXPORT void vyCloseLib(vy_dynlib lib) {
+    dlclose(lib);
+}
+
+
+#endif

src/runtime/dynamic_libs.h

@@ -0,0 +1,20 @@
+#ifndef VY_DYNAMIC_LIBS_H
+#define VY_DYNAMIC_LIBS_H
+
+#include "runtime.h"
+
+#ifdef _WIN32
+    #define VY_DLLNAME(s) (s".dll")
+#elif defined(__linux__)
+    #define VY_DLLNAME(s) ("lib"s".so")
+#endif
+
+typedef void *vy_dynlib;
+
+VY_DLLEXPORT vy_dynlib vyOpenLib(const char *libname);
+
+VY_DLLEXPORT void *vyGetSymbol(vy_dynlib lib, const char *symbol);
+
+VY_DLLEXPORT void vyCloseLib(vy_dynlib lib);
+
+#endif

src/runtime/error_report.c

@@ -1,7 +1,7 @@
 #include <stdarg.h>
 #include <stdio.h>
 
-#include "voyage.h"
+#include "runtime.h"
 
 #ifdef _WIN32
 #define WIN32_LEAN_AND_MEAN
@@ -40,7 +40,7 @@ static void LogOut(const char *text)
 #endif
 }
 
-void vyReportError(const char *subsystem, const char *fmt, ...) {
+VY_DLLEXPORT void vyReportError(const char *subsystem, const char *fmt, ...) {
     char buf[256];
 
     int at = snprintf(buf, VY_ARRAY_COUNT(buf) - 1, "[%s] ", subsystem);
@@ -54,7 +54,7 @@ void vyReportError(const char *subsystem, const char *fmt, ...) {
     DisplayErrorBox(buf);
 }
 
-void vyLog(const char *subsystem, const char *fmt, ...) {
+VY_DLLEXPORT void vyLog(const char *subsystem, const char *fmt, ...) {
     char buf[256];
 
     int at = snprintf(buf, VY_ARRAY_COUNT(buf) - 1, "[%s] ", subsystem);

src/runtime/fio.c

@@ -139,7 +139,7 @@ static void *linuxFIOThreadProc(void *);
 static DWORD WINAPI win32FIOThreadProc(_In_ LPVOID);
 #endif
 
-bool vyInitFIO(const vy_fio_config *config) {
+VY_DLLEXPORT bool vyInitFIO(const vy_fio_config *config) {
     unsigned int queue_size = (config->queue_size) ? config->queue_size : 512;
     unsigned int max_file_count =
         (config->max_file_count) ? config->max_file_count : 512;
@@ -165,7 +165,7 @@ bool vyInitFIO(const vy_fio_config *config) {
     return true;
 }
 
-void vyShutdownFIO(void) {
+VY_DLLEXPORT void vyShutdownFIO(void) {
 #ifdef __linux__
     pthread_cancel(_thread);
     pthread_join(_thread, NULL);
@@ -199,7 +199,7 @@ vy_file_id vyGetFileIdFromSpan(vy_text_span path) {
     return fid;
 }
 
-vy_file_id vyAddFileFromSpan(vy_text_span path) {
+VY_DLLEXPORT vy_file_id vyAddFileFromSpan(vy_text_span path) {
     vy_file_id fid = vyGetFileIdFromSpan(path);
 
 #ifdef __linux__
@@ -246,14 +246,14 @@ vy_file_id vyAddFileFromSpan(vy_text_span path) {
     return fid;
 }
 
-vy_file_id vyAddFile(const char *path) {
+VY_DLLEXPORT vy_file_id vyAddFile(const char *path) {
     vy_text_span span;
     span.start  = path;
     span.length = (unsigned int)strlen(path);
     return vyAddFileFromSpan(span);
 }
 
-const char *vyGetFilePath(vy_file_id fid) {
+VY_DLLEXPORT const char *vyGetFilePath(vy_file_id fid) {
     /* Hash Lookup */
     if (fid == 0)
         return NULL;
@@ -286,7 +286,7 @@ const char *vyGetFilePath(vy_file_id fid) {
     return result;
 }
 
-vy_fio_handle vyEnqueueRead(vy_file_id fid) {
+VY_DLLEXPORT vy_fio_handle vyEnqueueRead(vy_file_id fid) {
     vy_fio_handle handle = 0;
 
     do {
@@ -326,7 +326,7 @@ vy_fio_handle vyEnqueueRead(vy_file_id fid) {
     return handle;
 }
 
-void vyAbortFIO(vy_fio_handle fio) {
+VY_DLLEXPORT void vyAbortFIO(vy_fio_handle fio) {
     if (fio == 0)
         return;
 #ifdef __linux__
@@ -346,7 +346,7 @@ void vyAbortFIO(vy_fio_handle fio) {
 #endif
 }
 
-bool vyIsFIOFinished(vy_fio_handle fio) {
+VY_DLLEXPORT bool vyIsFIOFinished(vy_fio_handle fio) {
     if (fio == 0)
         return false;
 #ifdef __linux__
@@ -363,7 +363,8 @@ bool vyIsFIOFinished(vy_fio_handle fio) {
     return result;
 }
 
-bool vyRetrieveReadBuffer(vy_fio_handle fio, vy_file_buffer *buffer) {
+VY_DLLEXPORT bool vyRetrieveReadBuffer(vy_fio_handle fio,
+                                       vy_file_buffer *buffer) {
     if (fio == 0)
         return false;
 
@@ -394,7 +395,7 @@ bool vyRetrieveReadBuffer(vy_fio_handle fio, vy_file_buffer *buffer) {
     return is_finished;
 }
 
-void vyFreeFileBuffer(vy_file_buffer buffer) {
+VY_DLLEXPORT void vyFreeFileBuffer(vy_file_buffer buffer) {
     free(buffer.data);
 }
 

src/runtime/fio.h

@@ -0,0 +1,61 @@
+#ifndef VY_FIO_H
+#define VY_FIO_H
+
+#include <stdbool.h>
+#include <stddef.h>
+#include <stdint.h>
+
+#include "runtime.h"
+
+enum
+{
+    VY_FILE_BUFFER_FLAG_FILE_NOT_FOUND = 0x1,
+    VY_FILE_BUFFER_FLAG_READ_FAILED    = 0x2,
+};
+
+typedef struct {
+    void *data;
+    size_t size;
+    uint32_t flags;
+} vy_file_buffer;
+
+inline bool vyWasFileBufferSuccessful(const vy_file_buffer *fb) {
+    return fb->flags == 0;
+}
+
+/* used to identify a file (XXH3 hash of the path) */
+typedef uint64_t vy_file_id;
+
+typedef unsigned int vy_fio_handle;
+
+typedef struct {
+    unsigned int queue_size;
+    unsigned int max_file_count;
+} vy_fio_config;
+
+VY_DLLEXPORT bool vyInitFIO(const vy_fio_config *config);
+
+VY_DLLEXPORT void vyShutdownFIO(void);
+
+VY_DLLEXPORT vy_file_id vyGetFileId(const char *path);
+
+VY_DLLEXPORT vy_file_id vyGetFileIdFromSpan(vy_text_span path);
+
+VY_DLLEXPORT vy_file_id vyAddFile(const char *path);
+
+VY_DLLEXPORT vy_file_id vyAddFileFromSpan(vy_text_span path);
+
+VY_DLLEXPORT const char *vyGetFilePath(vy_file_id fid);
+
+VY_DLLEXPORT vy_fio_handle vyEnqueueRead(vy_file_id fid);
+
+VY_DLLEXPORT void vyAbortFIO(vy_fio_handle fio);
+
+VY_DLLEXPORT bool vyIsFIOFinished(vy_fio_handle fio);
+
+VY_DLLEXPORT bool vyRetrieveReadBuffer(vy_fio_handle fio,
+                                      vy_file_buffer *buffer);
+
+VY_DLLEXPORT void vyFreeFileBuffer(vy_file_buffer buffer);
+
+#endif

src/runtime/gfx.h

@@ -1,8 +1,6 @@
 #ifndef VY_GFX_H
 #define VY_GFX_H
 
-#include <stdint.h>
-
 /* graphics system. this is the interface of the rendering code.
  *
  * we need (at least) three different renderers:
@@ -11,11 +9,17 @@
  * - object renderer (for static models)
  */
 
+#include <stdint.h>
 #include <stdbool.h>
 
-bool vyInitRenderer(void);
+#include "runtime.h"
 
-void vyShutdownRenderer(void);
+/* In renderer_api.h -> Not necessary for almost all gfx usage */
+typedef struct vy_renderer_init_info_s vy_renderer_init_info;
+
+VY_DLLEXPORT bool vyInitGFX(vy_renderer_init_info *renderer_info);
+
+VY_DLLEXPORT void vyShutdownGFX(void);
 
 /* Generational indices for backend objects */
 typedef struct {

src/runtime/gfx_main.c

@@ -0,0 +1,75 @@
+#include <string.h>
+
+#define VY_DONT_DEFINE_RENDERER_GLOBAL
+
+#include "gfx.h"
+#include "renderer_api.h"
+#include "config.h"
+#include "dynamic_libs.h"
+
+/* Attributes are used to bind buffers (or textures) to symbolic values.
+ * For example, an attribute might be bound to "CELL_GRID", which would be
+ * replaced with the (at the time of the invoke) grid buffer of the current
+ * world cell.
+ */
+
+vy_renderer_api g_renderer;
+static vy_dynlib _renderer_lib;
+
+VY_CVAR_S(rt_Renderer,
+          "Select the render backend. Available options: [vk], Default: vk",
+          "vk");
+
+extern bool vyLoadShaders(const char **paths, vy_shader *shaders, unsigned int count);
+
+static bool LoadRenderer(void)
+{
+#define RETRIEVE_SYMBOL(name, type)                                            \
+    g_renderer.name = (type *)vyGetSymbol(_renderer_lib, "vy" #name);          \
+    if (!g_renderer.name) { \
+        vyReportError(                                                         \
+            "GFX",                                                             \
+            "Unable to retrieve renderer function %s from backend %s",         \
+            #name, rt_Renderer.s); \
+    }
+
+    if (strcmp(rt_Renderer.s, "vk") == 0) {
+        _renderer_lib = vyOpenLib(VY_DLLNAME("vyvk"));
+        if (!_renderer_lib) {
+            vyReportError("GFX",
+                          "Unable to load renderer backend: %s",
+                          VY_DLLNAME("vyvk"));
+            return false;
+        }
+        RETRIEVE_SYMBOL(Init, vy_init_renderer_fn);
+        RETRIEVE_SYMBOL(Shutdown, vy_shutdown_renderer_fn);
+        RETRIEVE_SYMBOL(CompileComputePipeline, vy_compile_compute_pipeline_fn);
+        RETRIEVE_SYMBOL(CompileGraphicsPipeline,
+                        vy_compile_graphics_pipeline_fn);
+        return true;
+    } else {
+        vyReportError("GFX", "Unsupported renderer backend: (%s) %s", rt_Renderer.name, rt_Renderer.s);
+        return false;
+    }
+#undef RETRIEVE_SYMBOL
+}
+
+VY_DLLEXPORT bool vyInitGFX(vy_renderer_init_info *renderer_info) {
+
+    if (!LoadRenderer())
+        return false;
+
+    if (g_renderer.Init(renderer_info) != 0)
+        return false;
+
+    /* Init shader programs */
+    const char *shader_files[] = {"shader/cell.shader"};
+    vy_shader shaders[1];
+    if (!vyLoadShaders(shader_files, shaders, 1))
+        return false;
+    return true;
+}
+
+VY_DLLEXPORT void vyShutdownGFX(void) {
+    g_renderer.Shutdown();
+}

src/runtime/gfx_shader_loading.c

@@ -6,10 +6,10 @@
 #include <stdlib.h>
 #include <string.h>
 
+#include "runtime.h"
 #include "fio.h"
 #include "gfx.h"
-#include "gfx_backend.h"
+#include "renderer_api.h"
-#include "voyage.h"
 
 typedef enum {
     VY_STMT_FORM_VALUE,
@@ -289,7 +289,7 @@ static vy_fio_handle DispatchShaderRead(const char *shader,
     return DispatchFileRead(path->value);
 }
 
-static vy_gfx_pipeline_id LinkProgram(vy_parse_state *state,
+static vy_gfx_pipeline_id CreatePipeline(vy_parse_state *state,
                                          const char *file_path,
                                          unsigned int root_list) {
     /* Process the data */
@@ -324,7 +324,7 @@ static vy_gfx_pipeline_id LinkProgram(vy_parse_state *state,
         vy_compute_pipeline_info info;
         info.compute_source         = compute_code.data;
         info.compute_source_length  = compute_code.size;
-        vy_gfx_pipeline_id pipeline = vyCompileComputePipeline(&info);
+        vy_gfx_pipeline_id pipeline = g_renderer.CompileComputePipeline(&info);
         vyFreeFileBuffer(compute_code);
         return pipeline;
     } else if (vertex_read || fragment_read) {
@@ -386,7 +386,7 @@ static vy_gfx_pipeline_id LinkProgram(vy_parse_state *state,
             }
         }
 
-        vy_gfx_pipeline_id pipeline = vyCompileGraphicsPipeline(&info);
+        vy_gfx_pipeline_id pipeline = g_renderer.CompileGraphicsPipeline(&info);
         vyFreeFileBuffer(vertex_code);
         vyFreeFileBuffer(fragment_code);
         return pipeline;
@@ -515,7 +515,7 @@ ParseShaderFile(vy_file_id fid, vy_file_buffer fbuf, vy_shader *shader) {
 
     DbgPrintShaderFile(&state, root_list, 0);
 
-    shader->pipeline = LinkProgram(&state, file_path, root_list);
+    shader->pipeline = CreatePipeline(&state, file_path, root_list);
     if (!VY_IS_GFX_ID_VALID(shader->pipeline)) {
         result = false;
         goto out;

src/runtime/renderer_api.h

@@ -0,0 +1,53 @@
+#ifndef VY_GFX_BACKEND_H
+#define VY_GFX_BACKEND_H
+
+/* Backend functions and types. */
+
+#include <stddef.h>
+
+#include "gfx.h"
+
+#ifdef _WIN32
+struct HINSTANCE__;
+struct HWND__;
+#endif
+
+struct vy_renderer_init_info_s {
+#ifdef _WIN32
+    struct HINSTANCE__ *hInstance;
+    struct HWND__ *hWnd;
+#endif
+};
+
+typedef struct {
+    const char *compute_source;
+    size_t compute_source_length;
+} vy_compute_pipeline_info;
+
+typedef struct {
+    const char *vertex_source;
+    size_t vertex_source_length;
+
+    const char *fragment_source;
+    size_t fragment_source_length;
+} vy_graphics_pipeline_info;
+
+typedef int vy_init_renderer_fn(const vy_renderer_init_info *info);
+typedef void vy_shutdown_renderer_fn(void);
+typedef vy_gfx_pipeline_id
+vy_compile_compute_pipeline_fn(const vy_compute_pipeline_info *info);
+typedef vy_gfx_pipeline_id
+vy_compile_graphics_pipeline_fn(const vy_graphics_pipeline_info *info);
+
+typedef struct {
+    vy_init_renderer_fn *Init;
+    vy_shutdown_renderer_fn *Shutdown;
+    vy_compile_compute_pipeline_fn *CompileComputePipeline;
+    vy_compile_graphics_pipeline_fn *CompileGraphicsPipeline;
+} vy_renderer_api;
+
+#ifndef VY_DONT_DEFINE_RENDERER_GLOBAL
+extern vy_renderer_api g_renderer;
+#endif
+
+#endif

src/runtime/runtime.h

@@ -5,6 +5,12 @@
 
 #include <stddef.h>
 
+#ifdef _WIN32
+        #define VY_DLLEXPORT __declspec(dllexport)
+#else
+        #define VY_DLLEXPORT
+#endif
+
 #define VY_UNUSED(x) ((void)sizeof((x)))
 #define VY_ARRAY_COUNT(x) (sizeof((x)) / sizeof((x)[0]))
 
@@ -13,8 +19,8 @@ typedef struct {
     unsigned int length;
 } vy_text_span;
 
-void vyReportError(const char *subsystem, const char *fmt, ...);
+VY_DLLEXPORT void vyReportError(const char *subsystem, const char *fmt, ...);
 
-void vyLog(const char *subsystem, const char *fmt, ...);
+VY_DLLEXPORT void vyLog(const char *subsystem, const char *fmt, ...);
 
 #endif

src/runtime/runtime_cvars.c

@@ -0,0 +1,14 @@
+#include "config.h"
+
+extern vy_cvar rt_Renderer;
+extern vy_cvar rt_Fullscreen;
+extern vy_cvar rt_WindowWidth;
+extern vy_cvar rt_WindowHeight;
+
+void __RegisterRuntimeCVars(void)
+{
+    vyRegisterCVAR(&rt_Renderer);
+    vyRegisterCVAR(&rt_Fullscreen);
+    vyRegisterCVAR(&rt_WindowWidth);
+    vyRegisterCVAR(&rt_WindowHeight);
+}

src/runtime/threading.c

@@ -1,5 +1,5 @@
 #include "threading.h"
-#include "voyage.h"
+#include "runtime.h"
 
 #ifdef _WIN32
 #define WIN32_LEAN_AND_MEAN
@@ -15,7 +15,7 @@ static vy_mutex _mutex[MAX_MUTEX];
 static ptrdiff_t _first_reusable = MAX_MUTEX;
 static ptrdiff_t _next       = 0;
 
-vy_mutex *vyCreateMutex(void) {
+VY_DLLEXPORT vy_mutex *vyCreateMutex(void) {
     if (_first_reusable < MAX_MUTEX) {
         vy_mutex *mtx   = &_mutex[_first_reusable];
         _first_reusable = mtx->next_reusable;
@@ -35,18 +35,18 @@ vy_mutex *vyCreateMutex(void) {
     return NULL;
 }
 
-void vyDestroyMutex(vy_mutex *mutex) {
+VY_DLLEXPORT void vyDestroyMutex(vy_mutex *mutex) {
     ptrdiff_t index      = mutex - &_mutex[0];
     mutex->next_reusable = _first_reusable;
     _first_reusable      = index;
 }
 
-bool vyLockMutex(vy_mutex *mutex) {
+VY_DLLEXPORT bool vyLockMutex(vy_mutex *mutex) {
     return WaitForSingleObject(mutex->handle, INFINITE) == WAIT_OBJECT_0;
 }
 
-bool vyUnlockMutex(vy_mutex *mutex) {
+VY_DLLEXPORT bool vyUnlockMutex(vy_mutex *mutex) {
-    return ReleaseMutex(mutex) != 0;
+    return ReleaseMutex(mutex->handle) != 0;
 }
 
 #elif defined(__linux__)
@@ -62,7 +62,7 @@ static vy_mutex _mutex[MAX_MUTEX];
 static ptrdiff_t _first_reusable = MAX_MUTEX;
 static ptrdiff_t _next           = 0;
 
-vy_mutex *vyCreateMutex(void) {
+VY_DLLEXPORT vy_mutex *vyCreateMutex(void) {
     if (_first_reusable < MAX_MUTEX) {
         vy_mutex *mtx   = &_mutex[_first_reusable];
         _first_reusable = mtx->next_reusable;
@@ -81,17 +81,17 @@ vy_mutex *vyCreateMutex(void) {
     return NULL;
 }
 
-void vyDestroyMutex(vy_mutex *mutex) {
+VY_DLLEXPORT void vyDestroyMutex(vy_mutex *mutex) {
     ptrdiff_t index      = mutex - &_mutex[0];
     mutex->next_reusable = _first_reusable;
     _first_reusable      = index;
 }
 
-bool vyLockMutex(vy_mutex *mutex) {
+VY_DLLEXPORT bool vyLockMutex(vy_mutex *mutex) {
     return pthread_mutex_lock(&mutex->handle) == 0;
 }
 
-bool vyUnlockMutex(vy_mutex *mutex) {
+VY_DLLEXPORT bool vyUnlockMutex(vy_mutex *mutex) {
     return pthread_mutex_unlock(&mutex->handle) == 0;
 }
 

src/runtime/threading.h

@@ -0,0 +1,20 @@
+#ifndef VY_THREADING_H
+#define VY_THREADING_H
+
+/* platform independent threading */
+
+#include <stdbool.h>
+
+#include "runtime.h"
+
+typedef struct vy_mutex_s vy_mutex;
+
+VY_DLLEXPORT vy_mutex *vyCreateMutex(void);
+
+VY_DLLEXPORT void vyDestroyMutex(vy_mutex *mutex);
+
+VY_DLLEXPORT bool vyLockMutex(vy_mutex *mutex);
+
+VY_DLLEXPORT bool vyUnlockMutex(vy_mutex *mutex);
+
+#endif

src/voyage.c

@@ -1,115 +0,0 @@
-#include <glad/glad.h>
-
-#include <GLFW/glfw3.h>
-#include <assert.h>
-#include <stdio.h>
-#include <string.h>
-
-#include "fio.h"
-#include "gfx.h"
-#include "threading.h"
-
-static void glfw_error_cb(int err, const char *description) {
-    fprintf(stderr, "[GLFW] %u: %s\n", err, description);
-}
-
-static void make_window_windowed_fullscreen(GLFWwindow *window,
-                                            GLFWmonitor *monitor) {
-    const GLFWvidmode *mode = glfwGetVideoMode(monitor);
-    glfwSetWindowMonitor(window,
-                         monitor,
-                         0,
-                         0,
-                         mode->width,
-                         mode->height,
-                         mode->refreshRate);
-}
-
-static void make_window_windowed(GLFWwindow *window, int w, int h) {
-    glfwSetWindowMonitor(window, NULL, 0, 0, w, h, GLFW_DONT_CARE);
-}
-
-typedef struct {
-    int f1;
-    int esc;
-} key_states;
-
-int main(int argc, char **argv) {
-    glfwSetErrorCallback(glfw_error_cb);
-    if (!glfwInit()) {
-        return 1;
-    }
-    printf("[GFLW] Version: %s\n", glfwGetVersionString());
-
-    /* Create a windowed full screen window */
-    glfwWindowHint(GLFW_CLIENT_API, GLFW_OPENGL_API);
-    glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
-    glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 4);
-    glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 5);
-    GLFWwindow *window = glfwCreateWindow(640, 480, "Voyage", NULL, NULL);
-    if (!window) {
-        fprintf(stderr, "[GFX] Window creation failed.\n");
-        return 1;
-    }
-    glfwMakeContextCurrent(window);
-    glfwSwapInterval(1);
-
-    if (!gladLoadGL()) {
-        fprintf(stderr, "[GFX] OpenGL load failed.\n");
-        return 1;
-    }
-
-    vy_fio_config fio_config = {0};
-    if (!vyInitFIO(&fio_config)) {
-        fprintf(stderr, "[FIO] Init failed.\n");
-        return 1;
-    }
-
-    if (!vyInitRenderer()) {
-        fprintf(stderr, "[GFX] Init failed.\n");
-        return 1;
-    }
-    printf("GL_MAX_SHADER_STORAGE_BUFFER_BINDINGS: %u\n",
-           GL_MAX_SHADER_STORAGE_BUFFER_BINDINGS);
-    printf("GL_MAX_UNIFORM_BUFFER_BINDINGS: %u\n",
-           GL_MAX_UNIFORM_BUFFER_BINDINGS);
-
-    key_states prev_keys = {0};
-    int window_state     = 0;
-
-    while (!glfwWindowShouldClose(window)) {
-        /* Gather input */
-        key_states keys;
-        keys.f1  = glfwGetKey(window, GLFW_KEY_F1);
-        keys.esc = glfwGetKey(window, GLFW_KEY_ESCAPE);
-
-        if (keys.f1 && !prev_keys.f1) {
-            if (window_state)
-                make_window_windowed(window, 640, 480);
-            else
-                make_window_windowed_fullscreen(window,
-                                                glfwGetPrimaryMonitor());
-            window_state = !window_state;
-        }
-
-        if (keys.esc)
-            glfwSetWindowShouldClose(window, GLFW_TRUE);
-
-        int fbw, fbh;
-        glfwGetFramebufferSize(window, &fbw, &fbh);
-        glViewport(0, 0, fbw, fbh);
-        glClearColor(0, 0, 0, 0);
-        glClear(GL_COLOR_BUFFER_BIT);
-
-        glfwSwapBuffers(window);
-        glfwPollEvents();
-        prev_keys = keys;
-    }
-
-    vyShutdownRenderer();
-    vyShutdownFIO();
-
-    glfwDestroyWindow(window);
-    glfwTerminate();
-    return 0;
-}