start cleanup

src/main.c

@@ -152,6 +152,25 @@ typedef struct VulkanContextStruct {
   VkDevice device;
   Queues queues;
 
+  // G Buffer
+  GPUPage* g_buffer_page;
+  VkRenderPass g_renderpass;
+  VkFramebuffer g_framebuffer;
+
+  GPUImage g_image_position;
+  GPUImage g_image_normal;
+  GPUImage g_image_depth;
+
+  VkImageView g_image_view_position;
+  VkImageView g_image_view_normal;
+  VkImageView g_image_view_depth;
+
+  VkFormat g_image_format_position;
+  VkFormat g_image_format_normal;
+  VkFormat g_image_format_depth;
+
+
+  // Present Swapchain
   VkSurfaceKHR surface;
 
   SwapchainDetails swapchain_details;
@@ -2375,6 +2394,47 @@ VulkanContext* init_vulkan(GLFWwindow* window, uint32_t max_frames_in_flight) {
     context->in_flight_fences = if_fences;
   }
 
+  result = gpu_page_allocate(context->device, context->memories, 1000000, 0xFFFFFFFF, VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT, VK_MEMORY_PROPERTY_LAZILY_ALLOCATED_BIT, &context->g_buffer_page);
+  if(result != VK_SUCCESS) {
+    return 0;
+  }
+
+  VkImageCreateInfo g_pos_info = {
+    .sType = VK_STRUCTURE_TYPE_IMAGE_CREATE_INFO,
+    .usage = VK_IMAGE_USAGE_COLOR_ATTACHMENT_BIT,
+    .imageType = VK_IMAGE_TYPE_2D,
+    .extent = {
+      .width = context->swapchain_extent.width,
+      .height = context->swapchain_extent.height,
+      .depth = 1,
+    },
+    .mipLevels = 1,
+    .arrayLayers = 1,
+    .samples = VK_SAMPLE_COUNT_1_BIT,
+    .tiling = VK_IMAGE_TILING_OPTIMAL,
+  };
+
+  result = gpu_image_malloc(context->device, context->g_buffer_page, &g_pos_info, &context->g_image_position);
+  if(result != VK_SUCCESS) {
+    return 0;
+  }
+
+  VkImageViewCreateInfo g_pos_view_info = {
+    .sType = VK_STRUCTURE_TYPE_IMAGE_VIEW_CREATE_INFO,
+    .image = context->g_image_position.handle,
+    .viewType = VK_IMAGE_VIEW_TYPE_2D,
+    .format = VK_FORMAT_R16G16B16A16_SFLOAT,
+    .subresourceRange = {
+      .aspectMask = VK_IMAGE_ASPECT_COLOR_BIT,
+      .baseMipLevel = 0,
+      .levelCount = 1,
+      .baseArrayLayer = 0,
+      .layerCount = 1,
+    },
+  };
+
+  result = vkCreateImageView(context->device, &g_pos_view_info, 0, &context->g_image_view_position);
+
   return context;
 }