| /* |
| * MVKOSExtensions.h |
| * |
| * Copyright (c) 2014-2018 The Brenwill Workshop Ltd. (http://www.brenwill.com) |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| |
| /* This file contains convenient functions for accessing Metal components during execution. */ |
| |
| #pragma once |
| |
| #include "MVKCommonEnvironment.h" |
| #include <vulkan/vulkan.h> |
| |
| #import <Metal/Metal.h> |
| |
| |
| typedef float MVKOSVersion; |
| |
| /** |
| * Returns the operating system version as an MVKOSVersion, which is a float in which the |
| * whole number portion indicates the major version, and the fractional portion indicates |
| * the minor and patch versions, associating 2 decimal places to each. |
| * - (10.12.3) => 10.1203 |
| * - (8.0.2) => 8.0002 |
| */ |
| MVKOSVersion mvkOSVersion(void); |
| |
| /** |
| * Returns a monotonic timestamp value for use in Vulkan and performance timestamping. |
| * |
| * The returned value corresponds to the number of CPU "ticks" since the app was initialized. |
| * |
| * Calling this value twice, subtracting the first value from the second, and then multiplying |
| * the result by the value returned by mvkGetTimestampPeriod() will provide an indication of the |
| * number of nanoseconds between the two calls. The convenience function mvkGetElapsedMilliseconds() |
| * can be used to perform this calculation. |
| */ |
| uint64_t mvkGetTimestamp(); |
| |
| /** Returns the number of nanoseconds between each increment of the value returned by mvkGetTimestamp(). */ |
| double mvkGetTimestampPeriod(); |
| |
| /** |
| * Returns the number of milliseconds elapsed between startTimestamp and endTimestamp, |
| * each of which should be a value returned by mvkGetTimestamp(). |
| * If endTimestamp is zero or not supplied, it is taken to be the current time. |
| * If startTimestamp is zero or not supplied, it is taken to be the time the app was initialized. |
| */ |
| double mvkGetElapsedMilliseconds(uint64_t startTimestamp = 0, uint64_t endTimestamp = 0); |
| |
| |
| #pragma mark - |
| #pragma mark MTLDevice |
| |
| /** Returns an approximation of how much memory, in bytes, the device can use with good performance. */ |
| uint64_t mvkRecommendedMaxWorkingSetSize(id<MTLDevice> mtlDevice); |
| |
| /** Populate the propertes with info about the GPU represented by the MTLDevice. */ |
| void mvkPopulateGPUInfo(VkPhysicalDeviceProperties& devProps, id<MTLDevice> mtlDevice); |
| |