07_image_views.diff

diff --git a/../steps/06_swapchain/main.go b/../steps/07_image_views/main.go
index 5536e3b..e03d590 100644
--- a/../steps/06_swapchain/main.go
+++ b/../steps/07_image_views/main.go
@@ -54,6 +54,7 @@ type HelloTriangleApplication struct {
 	swapchainImages      []core1_0.Image
 	swapchainImageFormat core1_0.Format
 	swapchainExtent      core1_0.Extent2D
+	swapchainImageViews  []core1_0.ImageView
 }
 
 func (app *HelloTriangleApplication) Run() error {
@@ -134,6 +135,10 @@ appLoop:
 }
 
 func (app *HelloTriangleApplication) cleanup() {
+	for _, imageView := range app.swapchainImageViews {
+		imageView.Destroy(nil)
+	}
+
 	if app.swapchain != nil {
 		app.swapchain.Destroy(nil)
 	}
@@ -270,7 +275,7 @@ func (app *HelloTriangleApplication) pickPhysicalDevice() error {
 	}
 
 	if app.physicalDevice == nil {
-		return errors.New("failed to find a suitable GPU!")
+		return errors.Errorf("failed to find a suitable GPU!")
 	}
 
 	return nil
@@ -378,6 +383,39 @@ func (app *HelloTriangleApplication) createSwapchain() error {
 	app.swapchainExtent = extent
 	app.swapchain = swapchain
 
+	images, _, err := swapchain.SwapchainImages()
+	if err != nil {
+		return err
+	}
+	app.swapchainImages = images
+
+	var imageViews []core1_0.ImageView
+	for _, image := range images {
+		view, _, err := app.device.CreateImageView(nil, core1_0.ImageViewCreateInfo{
+			ViewType: core1_0.ImageViewType2D,
+			Image:    image,
+			Format:   surfaceFormat.Format,
+			Components: core1_0.ComponentMapping{
+				R: core1_0.ComponentSwizzleIdentity,
+				G: core1_0.ComponentSwizzleIdentity,
+				B: core1_0.ComponentSwizzleIdentity,
+				A: core1_0.ComponentSwizzleIdentity,
+			},
+			SubresourceRange: core1_0.ImageSubresourceRange{
+				AspectMask:     core1_0.ImageAspectColor,
+				BaseMipLevel:   0,
+				LevelCount:     1,
+				BaseArrayLayer: 0,
+				LayerCount:     1,
+			},
+		})
+		if err != nil {
+			return err
+		}
+
+		imageViews = append(imageViews, view)
+	}
+	app.swapchainImageViews = imageViews
 	app.swapchainImageFormat = surfaceFormat.Format
 
 	return nil