Event logic & handle resize & close for xcb windows

3 files changed, 88 insertions, 24 deletions

diff --git a/src/main.cpp b/src/main.cpp
index 03db2ab..56e8d08 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -55,17 +55,31 @@ int main() {
     while(wnd.isOpen) {
         wnd.poll_events();
 
+        for (auto event: wnd.events) {
+            switch(event.type) {
+                case EVENT_TYPES::RESIZE: {
+                    renderer.recreate_swapchain();
+                    renderer.mapped_data->width = event.width;
+                    renderer.mapped_data->height = event.height;
+                    break;
+                }
+                case EVENT_TYPES::QUIT: {
+                    exit(1);
+                }
+                default: {
+                }
+            }
+        }
+
+        wnd.events.clear();
+
         // To start a frame capture, call StartFrameCapture.
         // You can specify NULL, NULL for the device to capture on if you have only one device and
         // either no windows at all or only one window, and it will capture from that device.
         // See the documentation below for a longer explanation
         if(rdoc_api) rdoc_api->StartFrameCapture(NULL, NULL);
 
-        auto start = std::chrono::high_resolution_clock::now();
         renderer.compute();
-        auto end = std::chrono::high_resolution_clock::now();
-
-        std::cerr << "Image generation took " << std::chrono::duration_cast<std::chrono::milliseconds>(end - start).count() << "ms" << std::endl;
 
         // stop the capture
         if(rdoc_api) rdoc_api->EndFrameCapture(NULL, NULL);
diff --git a/src/vk-renderer.cpp b/src/vk-renderer.cpp
index d5511a9..e2e171e 100644
--- a/src/vk-renderer.cpp
+++ b/src/vk-renderer.cpp
@@ -155,9 +155,7 @@ void vkrenderer::compute() {
 void vkrenderer::recreate_swapchain() {
     VKRESULT(vkWaitForFences(device, 1, &submission_fences[frame_index], VK_TRUE, UINT64_MAX))
 
-    destroy_swapchain();
-
-    create_surface();
+    destroy_swapchain_images();
 
     create_swapchain();
 
@@ -309,6 +307,8 @@ void vkrenderer::create_swapchain() {
 
     surface_format = supported_formats[0];
 
+    VkSwapchainKHR old_swapchain            = swapchain;
+
     VkSwapchainCreateInfoKHR create_info    = {};
     create_info.sType                       = VK_STRUCTURE_TYPE_SWAPCHAIN_CREATE_INFO_KHR;
     create_info.pNext                       = nullptr;
@@ -325,10 +325,13 @@ void vkrenderer::create_swapchain() {
     create_info.compositeAlpha              = VK_COMPOSITE_ALPHA_OPAQUE_BIT_KHR;
     create_info.presentMode                 = VK_PRESENT_MODE_FIFO_KHR;
     create_info.clipped                     = VK_TRUE;
-    create_info.oldSwapchain                = swapchain;
+    create_info.oldSwapchain                = old_swapchain;
 
     VKRESULT(vkCreateSwapchainKHR(device, &create_info, nullptr, &swapchain))
 
+    if (old_swapchain != VK_NULL_HANDLE) {
+        vkDestroySwapchainKHR(device, old_swapchain, nullptr);
+    }
 
     swapchain_images_count = 0;
     VKRESULT(vkGetSwapchainImagesKHR(device, swapchain, (uint32_t*)&swapchain_images_count, VK_NULL_HANDLE))
@@ -560,7 +563,7 @@ void vkrenderer::create_input_buffer(const input_data& inputs) {
 }
 
 
-void vkrenderer::destroy_swapchain() {
+void vkrenderer::destroy_swapchain_images() {
     if (swapchain != VK_NULL_HANDLE) {
         for (auto view: swapchain_images_views) {
             vkDestroyImageView(device, view, nullptr);
@@ -568,8 +571,6 @@ void vkrenderer::destroy_swapchain() {
 
         swapchain_images_views.clear();
         swapchain_images.clear();
-
-        vkDestroySwapchainKHR(device, swapchain, nullptr);
     }
 }
 
diff --git a/src/window.cpp b/src/window.cpp
index 7662295..d1d2f4f 100644
--- a/src/window.cpp
+++ b/src/window.cpp
@@ -11,6 +11,9 @@ window::window(uint32_t width, uint32_t height)
     auto setup = xcb_get_setup (connection);
     auto screen_info = xcb_setup_roots_iterator(setup).data;
 
+    xcb_event_mask_t events[] = {
+        XCB_EVENT_MASK_STRUCTURE_NOTIFY,
+    };
     xcb_create_window(
         connection,
         XCB_COPY_FROM_PARENT,
@@ -23,8 +26,29 @@ window::window(uint32_t width, uint32_t height)
         10,
         XCB_WINDOW_CLASS_INPUT_OUTPUT,
         screen_info->root_visual,
-        0,
-        nullptr
+        XCB_CW_EVENT_MASK,
+        events
+    );
+
+    // Ask for WM_PROTOCOLS atom
+    auto protocols_id   = xcb_intern_atom(connection, true, 12, "WM_PROTOCOLS");
+    auto protocols_atom = xcb_intern_atom_reply(connection, protocols_id, NULL)->atom;
+
+    // Ask for WM_DELETE_WINDOW atom
+    auto win_delete_id  = xcb_intern_atom(connection, false, 16, "WM_DELETE_WINDOW");
+    win_delete_atom     = xcb_intern_atom_reply(connection, win_delete_id, NULL)->atom;
+
+    // Allow the window to receive win close events
+    // https://lists.freedesktop.org/archives/xcb/2010-December/006713.html
+    xcb_change_property(
+        connection,
+        XCB_PROP_MODE_REPLACE,
+        win,
+        protocols_atom,
+        4,              // Predefined value for atom type
+        32,
+        1,
+        &win_delete_atom
     );
 
     xcb_map_window(connection, win);
@@ -32,6 +56,41 @@ window::window(uint32_t width, uint32_t height)
 
     isOpen = true;
 }
+
+void window::poll_events() {
+    xcb_generic_event_t *event;
+    while((event = xcb_poll_for_event (connection))) {
+        switch(event->response_type & ~0x80) {
+            case XCB_CONFIGURE_NOTIFY: {
+                auto notify_event = (xcb_configure_notify_event_t*)event;
+
+                if (width != notify_event->width || height != notify_event->height) {
+                    events.push_back({ 
+                        .width  = notify_event->width,
+                        .height = notify_event->height,
+                        .type   = EVENT_TYPES::RESIZE
+                    });
+
+                    width = notify_event->width;
+                    height = notify_event->height;
+                }
+
+                break;
+            }
+            case XCB_CLIENT_MESSAGE: {
+                auto client_message_event = (xcb_client_message_event_t*)event;
+                if (client_message_event->data.data32[0] == win_delete_atom)  {
+                    events.push_back({ .type = EVENT_TYPES::QUIT });
+                }
+            }
+            default: {
+            }
+        }
+
+        free(event);
+    }
+}
+
 #elif defined(WINDOWS)
 LRESULT CALLBACK window::window_procedure(HWND hwnd, UINT umsg, WPARAM wparam, LPARAM lparam) {
     window* win = nullptr;
@@ -102,17 +161,7 @@ LRESULT window::message_handler(HWND hwnd, UINT umsg, WPARAM wparam, LPARAM lpar
             break;
         }
         case WM_SIZE: {
-            RECT rect;
-            if(GetWindowRect(hwnd, &rect))
-            {
-              width = rect.right - rect.left;
-              height = rect.bottom - rect.top;
-            }
-
-            if (renderer != nullptr) {
-                renderer->recreate_swapchain();
-                break;
-            }
+            event.push_back({ EVENT_TYPES::RESIZE });
         }
         default:
             return DefWindowProc(hwnd, umsg, wparam, lparam);