1 files changed, 129 insertions, 0 deletions

diff --git a/source/base/base_render_vulkan.cpp b/source/base/base_render_vulkan.cpp
new file mode 100644
index 0000000..9295d00
--- /dev/null
+++ b/source/base/base_render_vulkan.cpp
@@ -0,0 +1,129 @@
+#if 0
+#define VK_NO_PROTOTYPES
+
+internal void
+vk_render_entrypoint(MemArena *arena, WinParams *window, Params *params)
+{
+
+    // NOTE: requires #define VK_NO_PROTOTYPES
+    // NOTE: dlopen searches for a path starting with a '/' afterwards it starts searching other directories
+    // thats why the param is called path here. but we pass the name in stead
+    // https://tldp.org/HOWTO/Program-Library-HOWTO/dl-libraries.html
+
+
+
+    VkApplicationInfo app_info{}; // used for creating a vkInstance
+    VkInstanceCreateInfo create_info{};
+
+    //  fill in app info
+    {
+        app_info.sType = VK_STRUCTURE_TYPE_APPLICATION_INFO;
+        app_info.pApplicationName = params->name;
+        app_info.applicationVersion = VK_MAKE_VERSION(1, 0, 0);
+        app_info.pEngineName = window->name;
+        app_info.engineVersion = VK_MAKE_VERSION(1, 0, 0);
+        app_info.apiVersion = VK_API_VERSION_1_0;
+    }
+
+    // fill in create info
+    {
+        create_info.sType = VK_STRUCTURE_TYPE_INSTANCE_CREATE_INFO;
+        create_info.pApplicationInfo = &app_info;
+
+#if 0
+        // TODO: fill in the extenions for windows.
+        // where do we find these?
+        create_info.enabledExtensionCount   = ...;
+        create_info.ppEnabledExtensionNames = ...;
+#endif
+    }
+
+#ifdef BASE_DEBUG
+    bool enable_validation_layer = true;
+#else
+    bool enable_validation_layer = false;
+#endif
+
+
+    bool layer_found  = false;
+    // check validation support
+    ScratchArena scratch = scratch_start(arena);
+
+
+    // gather the validation layers and available layers
+    u32 layer_count;
+    vkEnumerateInstanceLayerProperties(&layer_count, NULL);
+    VkLayerProperties *available_layers;
+    String8List       *validation_layers = PushStructZero(arena, String8List);
+    String8Node vk_layer_khronos_validation_node = ToString8Node(str8("VK_LAYER_KHRONOS_validation"));
+    str8_list_push_node(validation_layers, &vk_layer_khronos_validation_node);
+    available_layers = PushArrayZero(arena, VkLayerProperties, layer_count);
+    vkEnumerateInstanceLayerProperties(&layer_count, available_layers);
+
+    for(String8Node *current_node = validation_layers->first; !is_nil_str8_node(current_node); current_node = current_node->next) {
+        for(u32 index = 0; index < layer_count; ++index) {
+            VkLayerProperties *current_layer = &available_layers[index];
+            String8 current_layer_name = str8(current_layer->layerName);
+            if(str8_is_match(current_node->value, current_layer_name)) {
+                layer_found = true;
+                break;
+            }
+        }
+    }
+
+    // check if we found that specific layer and we can continue
+
+    if(enable_validation_layer) { // check the avalaiobe layers after creating the instance
+        if(!layer_found) {
+            Log("requested validation layer not found!");
+        }
+
+
+        // extract names, null terminated
+        String8 *names_in_one_str8_lit = PushStructZero(arena, String8);
+        for(u32 index = 0; index < layer_count; ++index) {
+            VkLayerProperties *current_layer = &available_layers[index];
+            String8 current_layer_name;
+            if(current_layer != NULL) {
+                current_layer_name       = str8(current_layer->layerName);
+            } else {
+                breakpoint();
+            }
+            str8_append(names_in_one_str8_lit, &current_layer_name);
+        }
+
+        create_info.enabledLayerCount   = layer_count;
+        create_info.ppEnabledLayerNames = (const char *)names_in_one_str8_lit->data;  // TODO: is this fixed???
+    }
+
+    VkInstance instance = VK_NULL_HANDLE;
+    VkResult result = vkCreateInstance(&create_info, NULL, &instance);
+
+    if(result != VK_SUCCESS) { // check the return code of the instance creation
+        Log("Failed to create a VkInstance");
+    } else {
+        scratch_end(&scratch);
+
+        {
+            // TODO: window polling untill it closes
+        }
+    }
+
+    if(instance != VK_NULL_HANDLE) {
+        vkDestroyInstance(instance, nullptr);
+    }
+}
+
+
+internal void
+render_loop()
+{
+
+
+
+
+}
+
+
+
+#endif
\ No newline at end of file