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Updated docs to include device and swapchain deletion.

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Fix example triangle to properly exit if swapchain recreation fails.
This commit is contained in:
Charles Giessen 2020-06-08 15:40:33 -06:00
parent 8a053cadc3
commit d169f3e32d
4 changed files with 29 additions and 19 deletions
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11
docs/getting_started.md
View File

@ -185,6 +185,11 @@ auto dev_ret = device_builder.add_pNext(&descriptor_indexing_features)
.build ();
```
To destroy a `vkb::Device`, call `vkb::destroy_device()`.
```cpp
vkb::destroy_device(vkb_device);
```
### Queues
By default, `vkb::DeviceBuilder` will enable one queue from each queue family available on the `VkPhysicalDevice`. This is done because in practice, most use cases only need a single queue from each family.
@ -245,3 +250,9 @@ if !(swap_ret){
// Note that this is the same vkb::Swapchain which was fed into vkb::SwapchainBuilder
vkb_swapchain = swap_ret.value();
```
To destroy the swapchain, call `vkb::destroy_swapchain()`. This is null out the VkSwapchainHandle inside of it.
```cpp
vkb::destroy_swapchain(vkb_swapchain);
```

19
example/triangle.cpp
View File

@ -71,20 +71,23 @@ int device_initialization (Init& init) {
}
int create_swapchain (Init& init) {
vkb::SwapchainBuilder swapchain_builder{ init.device };
auto swap_ret = swapchain_builder.use_default_format_selection ()
.use_default_present_mode_selection ()
auto swap_ret = swapchain_builder
.set_old_swapchain (init.swapchain)
.build ();
static int count = 0;
count++;
std::cout << count << '\n';
if (!swap_ret) {
std::cout << swap_ret.error ().message () << " " << swap_ret.vk_result () << "\n";
init.swapchain.swapchain = VK_NULL_HANDLE;
return -1;
}
init.swapchain = swap_ret.value ();
return 0;
}
int get_queues (Init& init, RenderData& data) {
auto gq = init.device.get_queue (vkb::QueueType::graphics);
if (!gq.has_value ()) {
@ -442,11 +445,7 @@ int recreate_swapchain (Init& init, RenderData& data) {
init.swapchain.destroy_image_views (data.swapchain_image_views);
int created_swapchain = create_swapchain (init);
while (created_swapchain != 0) {
init.swapchain.swapchain = VK_NULL_HANDLE;
created_swapchain = create_swapchain (init);
}
if (0 != create_swapchain (init)) return -1;
if (0 != create_framebuffers (init, data)) return -1;
if (0 != create_command_pool (init, data)) return -1;
if (0 != create_command_buffers (init, data)) return -1;
@ -466,9 +465,8 @@ int draw_frame (Init& init, RenderData& data) {
if (result == VK_ERROR_OUT_OF_DATE_KHR) {
return recreate_swapchain (init, data);
return 0;
} else if (result != VK_SUCCESS && result != VK_SUBOPTIMAL_KHR) {
std::cout << "failed to recreate swapchain. Error " << result << "\n";
std::cout << "failed to acquire swapchain image. Error " << result << "\n";
return -1;
}
@ -515,7 +513,6 @@ int draw_frame (Init& init, RenderData& data) {
result = vkQueuePresentKHR (data.present_queue, &present_info);
if (result == VK_ERROR_OUT_OF_DATE_KHR || result == VK_SUBOPTIMAL_KHR) {
return recreate_swapchain (init, data);
return 0;
} else if (result != VK_SUCCESS) {
std::cout << "failed to present swapchain image\n";
return -1;

6
src/VkBootstrap.cpp
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@ -1292,9 +1292,11 @@ VkExtent2D find_extent (
}
} // namespace detail
void destroy_swapchain (Swapchain const& swapchain) {
if (swapchain.device != VK_NULL_HANDLE && swapchain.swapchain != VK_NULL_HANDLE)
void destroy_swapchain (Swapchain& swapchain) {
if (swapchain.device != VK_NULL_HANDLE && swapchain.swapchain != VK_NULL_HANDLE) {
vkDestroySwapchainKHR (swapchain.device, swapchain.swapchain, swapchain.allocation_callbacks);
swapchain.swapchain = VK_NULL_HANDLE;
}
}
SwapchainBuilder::SwapchainBuilder (Device const& device) {

2
src/VkBootstrap.h
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@ -528,7 +528,7 @@ struct Swapchain {
void destroy_image_views (std::vector<VkImageView> const& image_views);
};
void destroy_swapchain (Swapchain const& swapchain);
void destroy_swapchain (Swapchain & swapchain);
class SwapchainBuilder {
public: