abdelrahman/how-to-vulkan
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Add sync objects

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Abdelrahman Said
2026-06-14 15:45:48 +01:00
parent e3195c9b12
commit d2c901f4e4
1 changed files with 70 additions and 28 deletions
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main.cpp
+69 -27
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@@ -37,6 +37,7 @@ enum ExitCode {
EXIT_CODE_NO_SUITABLE_QUEUE_FAMILY, EXIT_CODE_NO_SUITABLE_QUEUE_FAMILY,
EXIT_CODE_NO_SUITABLE_DEPTH_FORMAT, EXIT_CODE_NO_SUITABLE_DEPTH_FORMAT,
EXIT_CODE_MESH_LOAD_FAILED, EXIT_CODE_MESH_LOAD_FAILED,
EXIT_CODE_SYNC_OBJ_CREATE_FAILED,
}; };
struct Vertex { struct Vertex {
@@ -67,42 +68,47 @@ typedef VkImageView *VkImageViewArray;
typedef VkFormat *VkFormatArray; typedef VkFormat *VkFormatArray;
typedef Vertex *VertexArray; typedef Vertex *VertexArray;
typedef ShaderDataBuffer *ShaderDataBufferArray; typedef ShaderDataBuffer *ShaderDataBufferArray;
typedef VkFence *VkFenceArray;
typedef VkSemaphore *VkSemaphoreArray;
wapp_intern inline void check(VkResult result); wapp_intern inline void check(VkResult result);
wapp_intern inline void check_swapchain(VkResult result); wapp_intern inline void check_swapchain(VkResult result);
wapp_intern inline void check(bool result, i32 code); wapp_intern inline void check(bool result, i32 code);
wapp_intern constexpr u32 max_frames_in_flight = 2; wapp_intern constexpr u32 max_frames_in_flight = 2;
wapp_intern bool running = true; wapp_intern bool running = true;
wapp_intern bool update_swapchain = false; wapp_intern bool update_swapchain = false;
wapp_intern f32 display_scale = 1.0f; wapp_intern f32 display_scale = 1.0f;
wapp_intern SDL_Window *window = nullptr; wapp_intern SDL_Window *window = nullptr;
wapp_intern VkInstance instance = VK_NULL_HANDLE; wapp_intern VkInstance instance = VK_NULL_HANDLE;
wapp_intern VkPhysicalDevice physical_device = VK_NULL_HANDLE; wapp_intern VkPhysicalDevice physical_device = VK_NULL_HANDLE;
wapp_intern VkSurfaceKHR surface = VK_NULL_HANDLE; wapp_intern VkSurfaceKHR surface = VK_NULL_HANDLE;
wapp_intern u32 queue_family_index = 0; wapp_intern u32 queue_family_index = 0;
wapp_intern VkDevice device = VK_NULL_HANDLE; wapp_intern VkDevice device = VK_NULL_HANDLE;
wapp_intern VkQueue queue = VK_NULL_HANDLE; wapp_intern VkQueue queue = VK_NULL_HANDLE;
wapp_intern VmaAllocator allocator = VK_NULL_HANDLE; wapp_intern VmaAllocator allocator = VK_NULL_HANDLE;
wapp_intern glm::ivec2 window_size = {}; wapp_intern glm::ivec2 window_size = {};
// NOTE (Abdelrahman): The following three variables are better queried from the physical device // NOTE (Abdelrahman): The following three variables are better queried from the physical device
// to find the different supported values. For the purposes of this tutorial, we're using defaults // to find the different supported values. For the purposes of this tutorial, we're using defaults
// that are guaranteed by the spec to be available on any valid implementation. // that are guaranteed by the spec to be available on any valid implementation.
wapp_intern VkFormat image_format = VK_FORMAT_B8G8R8A8_SRGB; wapp_intern VkFormat image_format = VK_FORMAT_B8G8R8A8_SRGB;
wapp_intern VkColorSpaceKHR colorspace = VK_COLOR_SPACE_SRGB_NONLINEAR_KHR; wapp_intern VkColorSpaceKHR colorspace = VK_COLOR_SPACE_SRGB_NONLINEAR_KHR;
wapp_intern VkPresentModeKHR present_mode = VK_PRESENT_MODE_FIFO_KHR; wapp_intern VkPresentModeKHR present_mode = VK_PRESENT_MODE_FIFO_KHR;
wapp_intern VkSwapchainKHR swapchain = VK_NULL_HANDLE; wapp_intern VkSwapchainKHR swapchain = VK_NULL_HANDLE;
wapp_intern u32 swapchain_image_count = 0; wapp_intern u32 swapchain_image_count = 0;
wapp_intern VkImageArray swapchain_images = nullptr; wapp_intern VkImageArray swapchain_images = nullptr;
wapp_intern VkImageViewArray swapchain_views = nullptr; wapp_intern VkImageViewArray swapchain_views = nullptr;
wapp_intern VkFormat depth_format = VK_FORMAT_UNDEFINED; wapp_intern VkFormat depth_format = VK_FORMAT_UNDEFINED;
wapp_intern VkImage depth_image = VK_NULL_HANDLE; wapp_intern VkImage depth_image = VK_NULL_HANDLE;
wapp_intern VkImageView depth_view = VK_NULL_HANDLE; wapp_intern VkImageView depth_view = VK_NULL_HANDLE;
wapp_intern VmaAllocation depth_allocation = VK_NULL_HANDLE; wapp_intern VmaAllocation depth_allocation = VK_NULL_HANDLE;
wapp_intern VkBuffer vert_index_buf = VK_NULL_HANDLE; wapp_intern VkBuffer vert_index_buf = VK_NULL_HANDLE;
wapp_intern VmaAllocation vert_index_buf_alloc = VK_NULL_HANDLE; wapp_intern VmaAllocation vert_index_buf_alloc = VK_NULL_HANDLE;
wapp_intern ShaderData shader_data = {}; wapp_intern ShaderData shader_data = {};
wapp_intern ShaderDataBufferArray shader_data_bufs; wapp_intern ShaderDataBufferArray shader_data_bufs;
wapp_intern VkFenceArray fences = nullptr;
wapp_intern VkSemaphoreArray image_acquired_semaphores = nullptr;
wapp_intern VkSemaphoreArray render_completed_semaphores = nullptr;
int main() { int main() {
// {{{ Initialisation // {{{ Initialisation
@@ -538,6 +544,34 @@ int main() {
} }
// }}} // }}}
// Synchronization Objects {{{
fences = wapp_array_alloc_capacity(VkFence, &arena, max_frames_in_flight, ARRAY_INIT_FILLED);
check(fences != nullptr, EXIT_CODE_SYNC_OBJ_CREATE_FAILED);
image_acquired_semaphores = wapp_array_alloc_capacity(VkSemaphore, &arena, max_frames_in_flight, ARRAY_INIT_FILLED);
check(image_acquired_semaphores != nullptr, EXIT_CODE_SYNC_OBJ_CREATE_FAILED);
// The number of semaphores used to signal rendering needs to match that of the swapchain's images
render_completed_semaphores = wapp_array_alloc_capacity(VkSemaphore, &arena, swapchain_image_count, ARRAY_INIT_FILLED);
check(render_completed_semaphores != nullptr, EXIT_CODE_SYNC_OBJ_CREATE_FAILED);
VkFenceCreateInfo fence_create_info = {};
fence_create_info.sType = VK_STRUCTURE_TYPE_FENCE_CREATE_INFO;
fence_create_info.flags = VK_FENCE_CREATE_SIGNALED_BIT;
VkSemaphoreCreateInfo semaphore_create_info = {};
semaphore_create_info.sType = VK_STRUCTURE_TYPE_SEMAPHORE_CREATE_INFO;
for (u32 i = 0; i < max_frames_in_flight; ++i) {
check(vkCreateFence(device, &fence_create_info, NULL, &fences[i]));
check(vkCreateSemaphore(device, &semaphore_create_info, NULL, &image_acquired_semaphores[i]));
}
for (u32 i = 0; i < swapchain_image_count; ++i) {
check(vkCreateSemaphore(device, &semaphore_create_info, NULL, &render_completed_semaphores[i]));
}
// }}}
// {{{ Render Loop // {{{ Render Loop
SDL_Event event = {}; SDL_Event event = {};
while (running) { while (running) {
@@ -557,6 +591,14 @@ int main() {
// }}} // }}}
// {{{ Cleanup // {{{ Cleanup
for (u32 i = 0; i < swapchain_image_count; ++i) {
vkDestroySemaphore(device, render_completed_semaphores[i], NULL);
}
for (u32 i = 0; i < max_frames_in_flight; ++i) {
vkDestroySemaphore(device, image_acquired_semaphores[i], NULL);
vkDestroyFence(device, fences[i], NULL);
}
for (u32 i = 0; i < max_frames_in_flight; ++i) { for (u32 i = 0; i < max_frames_in_flight; ++i) {
vmaDestroyBuffer(allocator, shader_data_bufs[i].buffer, shader_data_bufs[i].allocation); vmaDestroyBuffer(allocator, shader_data_bufs[i].buffer, shader_data_bufs[i].allocation);
} }