wip: framebuffer creation

1 files changed, 58 insertions, 4 deletions

diff --git a/src/renderer/backends/backend_vulkan.c b/src/renderer/backends/backend_vulkan.c
index 88cc87b..6e80861 100644
--- a/src/renderer/backends/backend_vulkan.c
+++ b/src/renderer/backends/backend_vulkan.c
@@ -75,6 +75,15 @@ typedef struct vulkan_renderpass {
   vulkan_renderpass_state state;
 } vulkan_renderpass;
 
+typedef struct vulkan_framebuffer {
+  VkFramebuffer handle;
+  u32 attachment_count;
+  VkImageView* attachments;
+  vulkan_renderpass* renderpass;
+} vulkan_framebuffer;
+
+KITC_DECL_TYPED_ARRAY(vulkan_framebuffer)
+
 typedef struct vulkan_swapchain {
   VkSurfaceFormatKHR image_format;
   u8 max_frames_in_flight;
@@ -83,6 +92,7 @@ typedef struct vulkan_swapchain {
   VkImage* images;
   VkImageView* views;
   vulkan_image depth_attachment;
+  vulkan_framebuffer_darray* framebuffers;
 } vulkan_swapchain;
 
 typedef enum vulkan_command_buffer_state {
@@ -122,10 +132,6 @@ typedef struct vulkan_context {
 #endif
 } vulkan_context;
 
-typedef struct vulkan_framebuffer {
-  // TODO: struct members
-} vulkan_framebuffer;
-
 static vulkan_context context;
 
 /** @brief Internal backend state */
@@ -385,6 +391,36 @@ void vulkan_image_create(vulkan_context* context, VkImageType image_type, u32 wi
 
 // TODO: vulkan_image_destroy
 
+void vulkan_framebuffer_create(
+  vulkan_context* context,
+  vulkan_renderpass* renderpass,
+  u32 width, u32 height,
+  u32 attachment_count,
+  VkImageView* attachments,
+  vulkan_framebuffer* out_framebuffer
+) {
+  out_framebuffer->attachments = malloc(sizeof(VKImageView) * attachment_count);
+  for (u32 i = 0; i < attachment_count; i++) {
+    out_framebuffer->attachments[i] = attachments[i];
+  }
+  out_framebuffer->attachment_count = attachment_count;
+  out_framebuffer->renderpass = renderpass;
+
+  VkFramebufferCreateInfo framebuffer_create_info = {}; // TODO
+
+  framebuffer_create_info.renderPass = renderpass->handle;
+  // TODO: fill out info - https://youtu.be/Is6CwlsaCFE?si=86ZGxU7S8licijCD&t=252
+
+  vkCreateFramebuffer(
+    context->device.logical_device,
+    &framebuffer_create_info,
+    context->allocator,
+    &out_framebuffer->handle
+  );
+}
+
+// TODO: vulkan_framebuffer_destroy
+
 void vulkan_command_buffer_allocate(vulkan_context* context, VkCommandPool pool, bool is_primary,
                                     vulkan_command_buffer* out_command_buffer) {
   VkCommandBufferAllocateInfo allocate_info = { VK_STRUCTURE_TYPE_COMMAND_BUFFER_ALLOCATE_INFO };
@@ -716,6 +752,20 @@ void create_command_buffers(renderer* ren) {
   }
 }
 
+void regenerate_framebuffers(renderer* ren, vulkan_swapchain* swapchain, vulkan_renderpass* renderpass) {
+  for (u32 i = 0; i < swapchain->image_count; i++) {
+    u32 attachment_count = 2; // one for depth, one for colour
+
+    VkImageView attachments[2] = {
+      swapchain->views[i],
+      swapchain->depth_attachment
+    };
+
+    vulkan_framebuffer_create(context, 
+      renderpass, context.framebuffer_width, context.framebuffer_height, 2, attachments, swapchain->framebuffers->data[i]);
+  }
+}
+
 bool gfx_backend_init(renderer* ren) {
   INFO("loading Vulkan backend");
 
@@ -838,6 +888,10 @@ bool gfx_backend_init(renderer* ren) {
                            vec4(0, 0, context.framebuffer_width, context.framebuffer_height),
                            vec4(0.0, 0.0, 0.2, 1.0), 1.0, 0);
 
+  // Framebiffers creation
+  context.swapchain.framebuffers = vulkan_framebuffer_darray_new(context.swapchain.image_count);
+  regenerate_framebuffers(ren, &context.swapchain, &context.main_renderpass);
+
   // Command buffers creation
   create_command_buffers(ren);