01_instance_creation.diff

diff --git a/../steps/00_base_code/main.go b/../steps/01_instance_creation/main.go
index fa094df..c5ea41a 100644
--- a/../steps/00_base_code/main.go
+++ b/../steps/01_instance_creation/main.go
@@ -1,12 +1,20 @@
 package main
 
 import (
+	"github.com/pkg/errors"
 	"github.com/veandco/go-sdl2/sdl"
+	"github.com/vkngwrapper/core/v2"
+	"github.com/vkngwrapper/core/v2/common"
+	"github.com/vkngwrapper/core/v2/core1_0"
+	"github.com/vkngwrapper/extensions/v2/khr_portability_enumeration"
 	"log"
 )
 
 type HelloTriangleApplication struct {
+	loader core.Loader
 	window *sdl.Window
+
+	instance core1_0.Instance
 }
 
 func (app *HelloTriangleApplication) Run() error {
@@ -35,11 +43,16 @@ func (app *HelloTriangleApplication) initWindow() error {
 	}
 	app.window = window
 
+	app.loader, err = core.CreateSystemLoader()
+	if err != nil {
+		return err
+	}
+
 	return nil
 }
 
 func (app *HelloTriangleApplication) initVulkan() error {
-	return nil
+	return app.createInstance()
 }
 
 func (app *HelloTriangleApplication) mainLoop() error {
@@ -57,12 +70,54 @@ appLoop:
 }
 
 func (app *HelloTriangleApplication) cleanup() {
+	if app.instance != nil {
+		app.instance.Destroy(nil)
+	}
+
 	if app.window != nil {
 		app.window.Destroy()
 	}
 	sdl.Quit()
 }
 
+func (app *HelloTriangleApplication) createInstance() error {
+	instanceOptions := core1_0.InstanceCreateInfo{
+		ApplicationName:    "Hello Triangle",
+		ApplicationVersion: common.CreateVersion(1, 0, 0),
+		EngineName:         "No Engine",
+		EngineVersion:      common.CreateVersion(1, 0, 0),
+		APIVersion:         common.Vulkan1_2,
+	}
+
+	// Add extensions
+	sdlExtensions := app.window.VulkanGetInstanceExtensions()
+	extensions, _, err := app.loader.AvailableExtensions()
+	if err != nil {
+		return err
+	}
+
+	for _, ext := range sdlExtensions {
+		_, hasExt := extensions[ext]
+		if !hasExt {
+			return errors.Errorf("createinstance: cannot initialize sdl: missing extension %s", ext)
+		}
+		instanceOptions.EnabledExtensionNames = append(instanceOptions.EnabledExtensionNames, ext)
+	}
+
+	_, enumerationSupported := extensions[khr_portability_enumeration.ExtensionName]
+	if enumerationSupported {
+		instanceOptions.EnabledExtensionNames = append(instanceOptions.EnabledExtensionNames, khr_portability_enumeration.ExtensionName)
+		instanceOptions.Flags |= khr_portability_enumeration.InstanceCreateEnumeratePortability
+	}
+
+	app.instance, _, err = app.loader.CreateInstance(nil, instanceOptions)
+	if err != nil {
+		return err
+	}
+
+	return nil
+}
+
 func main() {
 	app := &HelloTriangleApplication{}