XCB window geometry/surface dimensions appear to be stale despite reconfigure

Question

I was working with Vulkan on an XCB-provided window surface under my own windowing abstraction but encountered a rather strange behaviour when recreating the swapchain on recieving a window reconfigure event (XCB_CONFIGURE_NOTIFY).

The values returned by xcb_get_geometry appear to stay as the initial values for the window. i.e. if I created a window of extent 640x480 at (0,0), drag it elsewhere on the screen and resize it - the values returned by xcb_get_geometry will still be 640x480 at (0,0). I tried explicitly flushing and reconfiguring the window to some other value to see whether it was just a case of the events being delivered erroneously - but even though I could see the window visually resizing, xcb_get_geometry still remained the same.

The reason this was highlighted was that Validation Layers (Actual message attached below) notified me the extent I had specified to vkCreateSwapchain was outside the range of acceptable values according to vkGetPhysicalDeviceSurfaceCapabilitiesKHR - also 640x480 despite the window visually being resized and a resize event having been delivered. This too persisted even if I explicitly reconfigured the window before recreating the swapchain.

I feel like I may be missing some sort of surface-resize proc I should be calling, or maybe I have to wait a frame before resizing but I am not sure.

There is a lot of code but I can point out some relevant parts - it's all under this repo.

genstone/genfx/genuwin.c:361 Event polling code - configuration requests are buffered into separate position and window events delivered on the two subsequent calls to the one where the event is actually processed.

genstone/genfx/gengfx.c:902 Swapchain recreation code - shouldn't be problematic as far as I can see and the issue does appear to be on the side of my XCB abstraction but probably better to share as much info as possible.

sandbox/sample/main.c:240 Handling of wrapped Genuwin event and dispatching call to gen_internal_vk_create_swapchain.

The validation error which signalled this (Without Validation Layers submitting VkQueue results in failure):

Fatal: Validation Error: Validation Error: [ VUID-VkSwapchainCreateInfoKHR-imageExtent-01274 ] Object 0: handle = 0x62d000168450, type = VK_OBJECT_TYPE_DEVICE; | MessageID = 0x7cd0911d | vkCreateSwapchainKHR() called with imageExtent = (792,605), which is outside the bounds returned by vkGetPhysicalDeviceSurfaceCapabilitiesKHR(): currentExtent = (640,480), minImageExtent = (640,480), maxImageExtent = (640,480). The Vulkan spec states: imageExtent must be between minImageExtent and maxImageExtent, inclusive, where minImageExtent and maxImageExtent are members of the VkSurfaceCapabilitiesKHR structure returned by vkGetPhysicalDeviceSurfaceCapabilitiesKHR for the surface (https://www.khronos.org/registry/vulkan/specs/1.3-extensions/html/vkspec.html#VUID-VkSwapchainCreateInfoKHR-imageExtent-01274)
Trace: frame #0: 0x0x7f4c9a0afa00 gen_internal_vk_debug_callback() genstone/genfx/gengfx.c
Trace: frame #1: 0x0x7f4c9a0b33e0 gen_internal_vk_create_swapchain() genstone/genfx/gengfx.c
Trace: frame #2: 0x0x7f4c9a0baaa0 gen_gfx_targetable_geometry_update() genstone/genfx/gengfx.c
Trace: frame #3: 0x0x563b13ebcbc0 main() sandbox/sample/main.c

The backtrace is missing any code not tooled by me but you get the idea.

I am using XCB 1.15-1 (according to pacman), and I have submoduled all the Vulkan "stuff" I use (Validation Layers, headers, loader) so they're all up to date with their trunks (at the time I'm posting).

Answer 1

That page contains an iframe, so you need to switch into the frame first before interacting with an element inside it. I see you're using TinyMCE... here's an example test that enters text inside the iframe of a TinyMCE editor using the SeleniumBase framework:

https://github.com/seleniumbase/SeleniumBase/blob/master/examples/test_tinymce.py

To run the example, call pip install seleniumbase, then run the example with pytest.

from seleniumbase import BaseCase


class TinyMceTests(BaseCase):
    def test_tinymce(self):
        self.open("https://seleniumbase.io/tinymce/")
        self.wait_for_element("div.mce-container-body")
        self.click('span:contains("File")')
        self.click('span:contains("New document")')
        self.click('span:contains("Paragraph")')
        self.click('span:contains("Heading 2")')
        self.switch_to_frame("iframe")
        self.add_text("#tinymce", "Automate anything with SeleniumBase!\n")
        self.switch_to_default_content()
        self.click("button i.mce-i-image")
        self.type('input[aria-label="Width"].mce-textbox', "300")
        image_url = "https://seleniumbase.io/img/sb_logo_10.png"
        self.type("input.mce-textbox", image_url + "\n")
        self.switch_to_frame("iframe")
        self.click("h2")
        self.switch_to_default_content()
        self.post_message("Automate anything with SeleniumBase!")
        self.click('span:contains("File")')
        self.click('span:contains("Preview")')
        self.switch_to_frame('iframe[sandbox="allow-scripts"]')
        self.post_message("Learn SeleniumBase Today!")