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xo-imgui: refactor ex4a: cleanup() etc.

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This commit is contained in:
Roland Conybeare 2025-11-11 17:01:54 -05:00
commit 826298d097
2 changed files with 107 additions and 75 deletions
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88
xo-imgui/example/ex4a/VulkanApp.cpp
View file

@ -623,4 +623,92 @@ MinimalImGuiVulkan::record_command_buffer(VkCommandBuffer cmdbuf, uint32_t image
}
}
void
MinimalImGuiVulkan::recreate_swapchain()
{
// handle window minimization: wait until window has valid size
this->wait_not_minimized();
// wait until device idle before cleaning up resources
vkDeviceWaitIdle(device_);
// cleanup old swapchain
this->cleanup_framebuffers();
this->cleanup_image_views();
this->cleanup_swapchain();
// create new swapchain
this->create_swapchain();
this->create_image_views();
this->create_framebuffers();
}
void
MinimalImGuiVulkan::wait_not_minimized()
{
int width = 0;
int height = 0;
SDL_GetWindowSize(window_, &width, &height);
while (width == 0 || height == 0) {
SDL_GetWindowSize(window_, &width, &height);
SDL_WaitEvent(nullptr);
}
}
void
MinimalImGuiVulkan::cleanup_framebuffers()
{
for (auto framebuffer : framebuffers_) {
vkDestroyFramebuffer(device_, framebuffer, nullptr);
}
framebuffers_.clear();
}
void
MinimalImGuiVulkan::cleanup_image_views()
{
for (auto imageView : swapchain_image_views_) {
vkDestroyImageView(device_, imageView, nullptr);
}
swapchain_image_views_.clear();
}
void
MinimalImGuiVulkan::cleanup_swapchain()
{
vkDestroySwapchainKHR(device_, this->swapchain_, nullptr);
}
void
MinimalImGuiVulkan::cleanup()
{
ImGui_ImplVulkan_Shutdown();
ImGui_ImplSDL2_Shutdown();
ImGui::DestroyContext();
for (size_t i = 0; i < MAX_FRAMES_IN_FLIGHT; i++) {
vkDestroySemaphore(device_, render_finished_semaphores_[i], nullptr);
vkDestroySemaphore(device_, image_available_semaphores_[i], nullptr);
vkDestroyFence(device_, inflight_fences_[i], nullptr);
}
vkDestroyCommandPool(device_, command_pool_, nullptr);
this->cleanup_framebuffers();
this->cleanup_image_views();
this->cleanup_swapchain();
vkDestroyRenderPass(device_, render_pass_, nullptr);
vkDestroyDescriptorPool(device_, descriptor_pool_, nullptr);
vkDestroyDevice(device_, nullptr);
vkDestroySurfaceKHR(instance_, this->surface_, nullptr);
vkDestroyInstance(instance_, nullptr);
this->instance_ = nullptr;
SDL_DestroyWindow(window_);
this->window_ = nullptr;
SDL_Quit();
}
/* end VulkanApp.cpp */

84
xo-imgui/example/ex4a/VulkanApp.hpp
View file

@ -120,81 +120,25 @@ private:
/* record draw instructions into cmdbuf, framebuffers_[image_ix] */
void record_command_buffer(VkCommandBuffer commandBuffer, uint32_t image_ix);
void recreate_swapchain() {
// handle window minimization: wait until window has valid size
this->wait_not_minimized();
/* Teardown + create swapchain (swapchain + framebuffers + image views).
* Need this after window size changes
*/
void recreate_swapchain();
// wait until device idle before cleaning up resources
vkDeviceWaitIdle(device_);
/* wait until non-minimized window */
void wait_not_minimized();
// cleanup old swapchain
this->cleanup_framebuffers();
this->cleanup_image_views();
this->cleanup_swapchain();
/* orderly disposal of @ref framebuffers_ */
void cleanup_framebuffers();
// create new swapchain
this->create_swapchain();
this->create_image_views();
this->create_framebuffers();
}
/* orderly disposal of @ref swapchain_image_views_ */
void cleanup_image_views();
void wait_not_minimized() {
int width = 0;
int height = 0;
SDL_GetWindowSize(window_, &width, &height);
while (width == 0 || height == 0) {
SDL_GetWindowSize(window_, &width, &height);
SDL_WaitEvent(nullptr);
}
}
/* orderly disposal of @ref swapchain_ */
void cleanup_swapchain();
void cleanup_framebuffers() {
for (auto framebuffer : framebuffers_) {
vkDestroyFramebuffer(device_, framebuffer, nullptr);
}
framebuffers_.clear();
}
void cleanup_image_views() {
for (auto imageView : swapchain_image_views_) {
vkDestroyImageView(device_, imageView, nullptr);
}
swapchain_image_views_.clear();
}
void cleanup_swapchain() {
vkDestroySwapchainKHR(device_, this->swapchain_, nullptr);
}
void cleanup() {
ImGui_ImplVulkan_Shutdown();
ImGui_ImplSDL2_Shutdown();
ImGui::DestroyContext();
for (size_t i = 0; i < MAX_FRAMES_IN_FLIGHT; i++) {
vkDestroySemaphore(device_, render_finished_semaphores_[i], nullptr);
vkDestroySemaphore(device_, image_available_semaphores_[i], nullptr);
vkDestroyFence(device_, inflight_fences_[i], nullptr);
}
vkDestroyCommandPool(device_, command_pool_, nullptr);
this->cleanup_framebuffers();
this->cleanup_image_views();
this->cleanup_swapchain();
vkDestroyRenderPass(device_, render_pass_, nullptr);
vkDestroyDescriptorPool(device_, descriptor_pool_, nullptr);
vkDestroyDevice(device_, nullptr);
vkDestroySurfaceKHR(instance_, this->surface_, nullptr);
vkDestroyInstance(instance_, nullptr);
this->instance_ = nullptr;
SDL_DestroyWindow(window_);
this->window_ = nullptr;
SDL_Quit();
}
/* orderly shutdown */
void cleanup();
private:
SDL_Window* window_ = nullptr;