| 374 | |
| 375 | template <vkb::BindingType bindingType> |
| 376 | inline void RenderContext<bindingType>::begin_frame() |
| 377 | { |
| 378 | // Only handle surface changes if a swapchain exists |
| 379 | if (swapchain) |
| 380 | { |
| 381 | handle_surface_changes(); |
| 382 | } |
| 383 | |
| 384 | assert(!frame_active && "Frame is still active, please call end_frame"); |
| 385 | |
| 386 | auto &prev_frame = *frames[active_frame_index]; |
| 387 | |
| 388 | // We will use the acquired semaphore in a different frame context, |
| 389 | // so we need to hold ownership. |
| 390 | acquired_semaphore = prev_frame.get_semaphore_pool().request_semaphore_with_ownership(); |
| 391 | |
| 392 | if (swapchain) |
| 393 | { |
| 394 | vk::Result result; |
| 395 | try |
| 396 | { |
| 397 | std::tie(result, active_frame_index) = swapchain->acquire_next_image(acquired_semaphore); |
| 398 | } |
| 399 | catch (vk::OutOfDateKHRError & /*err*/) |
| 400 | { |
| 401 | result = vk::Result::eErrorOutOfDateKHR; |
| 402 | } |
| 403 | |
| 404 | if (result == vk::Result::eSuboptimalKHR || result == vk::Result::eErrorOutOfDateKHR) |
| 405 | { |
| 406 | #if defined(PLATFORM__MACOS) |
| 407 | // On Apple platforms, force swapchain update on both eSuboptimalKHR and eErrorOutOfDateKHR |
| 408 | // eSuboptimalKHR may occur on macOS/iOS following changes to swapchain other than extent/size |
| 409 | bool swapchain_updated = handle_surface_changes(true); |
| 410 | #else |
| 411 | bool swapchain_updated = handle_surface_changes(result == vk::Result::eErrorOutOfDateKHR); |
| 412 | #endif |
| 413 | |
| 414 | if (swapchain_updated) |
| 415 | { |
| 416 | // Need to destroy and reallocate acquired_semaphore since it may have already been signaled |
| 417 | device.get_handle().destroySemaphore(acquired_semaphore); |
| 418 | acquired_semaphore = prev_frame.get_semaphore_pool().request_semaphore_with_ownership(); |
| 419 | std::tie(result, active_frame_index) = swapchain->acquire_next_image(acquired_semaphore); |
| 420 | } |
| 421 | } |
| 422 | |
| 423 | if (result != vk::Result::eSuccess) |
| 424 | { |
| 425 | prev_frame.reset(); |
| 426 | return; |
| 427 | } |
| 428 | } |
| 429 | |
| 430 | // Now the frame is active again |
| 431 | frame_active = true; |
| 432 | |
| 433 | // Wait on all resource to be freed from the previous render to this frame |
no test coverage detected