Add image view creation.

src/main.c

@@ -47,6 +47,12 @@ typedef struct ApplicationState {
     //swapchain details:
     SwapChainSupportDetails details;
     VkSwapchainKHR swapchain;
+    uint32_t swapchain_image_count;
+    VkImage* swapchain_images;
+    VkFormat swapchain_image_format;
+    VkExtent2D swapchain_extent;
+    //describes how to access an image and allows access to it
+    VkImageView* swapchain_image_views;
 } ApplicationState;
 
 typedef struct QueueFamilyIndices {
@@ -470,6 +476,43 @@ void create_swap_chain(ApplicationState* state) {
     }
 
     printf("swapchain created\n");
+
+    vkGetSwapchainImagesKHR(state->device, state->swapchain, &image_count, NULL);
+    printf("image count %x\n", image_count);
+    state->swapchain_images = malloc(sizeof(VkImage) * image_count);
+    state->swapchain_image_count = image_count;
+    vkGetSwapchainImagesKHR(state->device, state->swapchain, &image_count, state->swapchain_images);
+    state->swapchain_image_format = format.format;
+    state->swapchain_extent = extent;
+}
+
+void create_image_views(ApplicationState* state) {
+    printf("creating image views\n");
+    state->swapchain_image_views = malloc(sizeof(VkImageView) * state->swapchain_image_count);
+
+    for (int i = 0; i < state->swapchain_image_count; i++) {
+        VkImageViewCreateInfo create_info = {0};
+        create_info.sType = VK_STRUCTURE_TYPE_IMAGE_VIEW_CREATE_INFO;
+        create_info.image = state->swapchain_images[i];
+        create_info.viewType = VK_IMAGE_VIEW_TYPE_2D;
+        create_info.format = state->swapchain_image_format;
+        create_info.components.r = VK_COMPONENT_SWIZZLE_IDENTITY;
+        create_info.components.g = VK_COMPONENT_SWIZZLE_IDENTITY;
+        create_info.components.b = VK_COMPONENT_SWIZZLE_IDENTITY;
+        create_info.components.a = VK_COMPONENT_SWIZZLE_IDENTITY;
+
+        create_info.subresourceRange.aspectMask = VK_IMAGE_ASPECT_COLOR_BIT;
+        create_info.subresourceRange.baseMipLevel = 0;
+        create_info.subresourceRange.levelCount = 1;
+        create_info.subresourceRange.baseArrayLayer = 0;
+        create_info.subresourceRange.layerCount = 1;
+
+        if (vkCreateImageView(state->device, &create_info, NULL, &state->swapchain_image_views[i]) != VK_SUCCESS) {
+            printf("failed to create image view %x\n", i);
+            exit(1);
+        }
+    }
+    printf("created image views\n");
 }
 
 void init_vulkan(ApplicationState* state) {
@@ -478,6 +521,7 @@ void init_vulkan(ApplicationState* state) {
     pick_physical_device(state);
     create_logical_device(state);
     create_swap_chain(state);
+    create_image_views(state);
 }
 
 void main_loop(ApplicationState* state) {
@@ -487,6 +531,9 @@ void main_loop(ApplicationState* state) {
 }
 
 void terminate(ApplicationState* state) {
+    for (int i = 0; i < state->swapchain_image_count; i++) {
+        vkDestroyImageView(state->device, state->swapchain_image_views[i], NULL);
+    }
     vkDestroySwapchainKHR(state->device, state->swapchain, NULL);
     vkDestroyDevice(state->device, NULL);
     vkDestroySurfaceKHR(state->instance, state->surface, NULL);