Merge "swapchain: increase the minimal buffer count to 3" into sc-dev (e74b34d0) · Commits · e / os / android_frameworks_native-old

vulkan/libvulkan/swapchain.cpp

+33 −16

Original line number	Diff line number	Diff line
		@@ -537,6 +537,30 @@ android_dataspace GetNativeDataspace(VkColorSpaceKHR colorspace) {
		}
		}

		int get_min_buffer_count(ANativeWindow* window,
		uint32_t* out_min_buffer_count) {
		constexpr int kExtraBuffers = 2;

		int err;
		int min_undequeued_buffers;
		err = window->query(window, NATIVE_WINDOW_MIN_UNDEQUEUED_BUFFERS,
		&min_undequeued_buffers);
		if (err != android::OK \|\| min_undequeued_buffers < 0) {
		ALOGE(
		"NATIVE_WINDOW_MIN_UNDEQUEUED_BUFFERS query failed: %s (%d) "
		"value=%d",
		strerror(-err), err, min_undequeued_buffers);
		if (err == android::OK) {
		err = android::UNKNOWN_ERROR;
		}
		return err;
		}

		*out_min_buffer_count =
		static_cast<uint32_t>(min_undequeued_buffers + kExtraBuffers);
		return android::OK;
		}

		} // anonymous namespace

		VKAPI_ATTR
		@@ -848,15 +872,13 @@ VkResult GetPhysicalDeviceSurfacePresentModesKHR(VkPhysicalDevice pdev,

		int err;
		int query_value;
		uint32_t min_buffer_count;
		ANativeWindow* window = SurfaceFromHandle(surface)->window.get();

		err = window->query(window, NATIVE_WINDOW_MIN_UNDEQUEUED_BUFFERS, &query_value);
		if (err != android::OK \|\| query_value < 0) {
		ALOGE("NATIVE_WINDOW_MIN_UNDEQUEUED_BUFFERS query failed: %s (%d) value=%d",
		strerror(-err), err, query_value);
		err = get_min_buffer_count(window, &min_buffer_count);
		if (err != android::OK) {
		return VK_ERROR_SURFACE_LOST_KHR;
		}
		uint32_t min_undequeued_buffers = static_cast<uint32_t>(query_value);

		err = window->query(window, NATIVE_WINDOW_MAX_BUFFER_COUNT, &query_value);
		if (err != android::OK \|\| query_value < 0) {
		@@ -867,7 +889,7 @@ VkResult GetPhysicalDeviceSurfacePresentModesKHR(VkPhysicalDevice pdev,
		uint32_t max_buffer_count = static_cast<uint32_t>(query_value);

		std::vector<VkPresentModeKHR> present_modes;
		if (min_undequeued_buffers + 1 < max_buffer_count)
		if (min_buffer_count < max_buffer_count)
		present_modes.push_back(VK_PRESENT_MODE_MAILBOX_KHR);
		present_modes.push_back(VK_PRESENT_MODE_FIFO_KHR);

		@@ -1188,19 +1210,14 @@ VkResult CreateSwapchainKHR(VkDevice device,
		}
		}

		int query_value;
		err = window->query(window, NATIVE_WINDOW_MIN_UNDEQUEUED_BUFFERS,
		&query_value);
		if (err != android::OK \|\| query_value < 0) {
		ALOGE("window->query failed: %s (%d) value=%d", strerror(-err), err,
		query_value);
		uint32_t min_buffer_count;
		err = get_min_buffer_count(window, &min_buffer_count);
		if (err != android::OK) {
		return VK_ERROR_SURFACE_LOST_KHR;
		}
		uint32_t min_undequeued_buffers = static_cast<uint32_t>(query_value);

		uint32_t num_images =
		(swap_interval ? create_info->minImageCount
		: std::max(3u, create_info->minImageCount)) -
		1 + min_undequeued_buffers;
		std::max(min_buffer_count, create_info->minImageCount);

		// Lower layer insists that we have at least two buffers. This is wasteful
		// and we'd like to relax it in the shared case, but not all the pieces are