/*
 * MVKEnvironment.h
 *
 * Copyright (c) 2015-2020 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.
 */


#pragma once

#include "MVKCommonEnvironment.h"
#include "mvk_vulkan.h"


// Expose MoltenVK Apple surface extension functionality
#ifdef VK_USE_PLATFORM_IOS_MVK
#	define vkCreate_PLATFORM_SurfaceMVK			vkCreateIOSSurfaceMVK
#	define Vk_PLATFORM_SurfaceCreateInfoMVK		VkIOSSurfaceCreateInfoMVK
#endif

#ifdef VK_USE_PLATFORM_MACOS_MVK
#	define vkCreate_PLATFORM_SurfaceMVK			vkCreateMacOSSurfaceMVK
#	define Vk_PLATFORM_SurfaceCreateInfoMVK		VkMacOSSurfaceCreateInfoMVK
#endif

/** Macro to determine the Vulkan version supported by MoltenVK. */
#define MVK_VULKAN_API_VERSION		VK_MAKE_VERSION(VK_VERSION_MAJOR(VK_API_VERSION_1_0),	\
													VK_VERSION_MINOR(VK_API_VERSION_1_0),	\
													VK_HEADER_VERSION)

/** 
 * Macro to adjust the specified Vulkan version to a value that can be compared for conformance 
 * against another Vulkan version. This macro strips the patch value from the specified Vulkan
 * version and replaces it with zero. A Vulkan version is comformant with another version if it
 * has the same or higher major and minor values, regardless of the patch value of each version.
 * In particular, by definition, a Vulkan version is conformant with another Vulkan version that
 * has a larger patch number, as long as it has a same or greater major and minor value.
 */
#define MVK_VULKAN_API_VERSION_CONFORM(api_ver)		VK_MAKE_VERSION(VK_VERSION_MAJOR(api_ver),	\
                                                                    VK_VERSION_MINOR(api_ver),	\
                                                                    0)

/** Flip the vertex coordinate in shaders. Enabled by default. */
#ifndef MVK_CONFIG_SHADER_CONVERSION_FLIP_VERTEX_Y
#   define MVK_CONFIG_SHADER_CONVERSION_FLIP_VERTEX_Y    1
#endif

/**
 * Process command queue submissions on the same thread on which the submission call was made.
 * The default value actually depends on whether MTLEvents are supported, becuase if MTLEvents
 * are not supported, then synchronous queues should be turned off by default to ensure the
 * CPU emulation of VkEvent behaviour does not deadlock a queue submission, whereas if MTLEvents
 * are supported, we want sychronous queues for better, and more performant, behaviour.
 * The app can of course still override this default behaviour by setting the
 * MVK_CONFIG_SYNCHRONOUS_QUEUE_SUBMITS env var, or the config directly.
 */
#if MVK_MACOS
#   define MVK_MTLEVENT_MIN_OS  10.14
#endif
#if MVK_IOS
#   define MVK_MTLEVENT_MIN_OS  12.0
#endif
#ifndef MVK_CONFIG_SYNCHRONOUS_QUEUE_SUBMITS
#   define MVK_CONFIG_SYNCHRONOUS_QUEUE_SUBMITS    (mvkOSVersion() >= MVK_MTLEVENT_MIN_OS)
#endif

/** Fill a Metal command buffers when each Vulkan command buffer is filled. */
#ifndef MVK_CONFIG_PREFILL_METAL_COMMAND_BUFFERS
#   define MVK_CONFIG_PREFILL_METAL_COMMAND_BUFFERS    0
#endif

/**
 * The maximum number of Metal command buffers that can be concurrently
 * active per Vulkan queue. Default is Metal's default value of 64.
 */
#ifndef MVK_CONFIG_MAX_ACTIVE_METAL_COMMAND_BUFFERS_PER_QUEUE
#   define MVK_CONFIG_MAX_ACTIVE_METAL_COMMAND_BUFFERS_PER_QUEUE    64
#endif

/** Support more than 8192 occlusion queries per buffer. Enabled by default. */
#ifndef MVK_CONFIG_SUPPORT_LARGE_QUERY_POOLS
#   define MVK_CONFIG_SUPPORT_LARGE_QUERY_POOLS    1
#endif

/** Present surfaces using a command buffer. Enabled by default. */
#ifndef MVK_CONFIG_PRESENT_WITH_COMMAND_BUFFER
#   define MVK_CONFIG_PRESENT_WITH_COMMAND_BUFFER    1
#endif

/** Use nearest sampling to magnify swapchain images. Enabled by default. */
#ifndef MVK_CONFIG_SWAPCHAIN_MAG_FILTER_USE_NEAREST
#   define MVK_CONFIG_SWAPCHAIN_MAG_FILTER_USE_NEAREST    1
#endif

/** The maximum amount of time, in nanoseconds, to wait for a Metal library. Default is infinite. */
#ifndef MVK_CONFIG_METAL_COMPILE_TIMEOUT
#   define MVK_CONFIG_METAL_COMPILE_TIMEOUT    INT64_MAX
#endif

/** Track performance. Disabled by default. */
#ifndef MVK_CONFIG_PERFORMANCE_TRACKING
#   define MVK_CONFIG_PERFORMANCE_TRACKING    0
#endif

/** Log performance once every this number of frames. Default is zero (never). */
#ifndef MVK_CONFIG_PERFORMANCE_LOGGING_FRAME_COUNT
#   define MVK_CONFIG_PERFORMANCE_LOGGING_FRAME_COUNT    0
#endif

/** Display the MoltenVK logo watermark. Disabled by default. */
#ifndef MVK_CONFIG_DISPLAY_WATERMARK
#   define MVK_CONFIG_DISPLAY_WATERMARK    0
#endif

/** Advertise specialized queue families. Disabled by default. */
#ifndef MVK_CONFIG_SPECIALIZED_QUEUE_FAMILIES
#   define MVK_CONFIG_SPECIALIZED_QUEUE_FAMILIES    0
#endif

/** If the Vulkan app selects a high-power GPU, force the system to use it. Enabled by default. */
#ifndef MVK_CONFIG_SWITCH_SYSTEM_GPU
#   define MVK_CONFIG_SWITCH_SYSTEM_GPU    1
#endif

/** Support full ImageView swizzles. Disabled by default. */
#ifndef MVK_CONFIG_FULL_IMAGE_VIEW_SWIZZLE
#   define MVK_CONFIG_FULL_IMAGE_VIEW_SWIZZLE    0
#endif

/**
 * The index of the queue family whose presentation submissions will
 * be used as the default GPU Capture Scope during debugging in Xcode.
 */
#ifndef MVK_CONFIG_DEFAULT_GPU_CAPTURE_SCOPE_QUEUE_FAMILY_INDEX
#   define MVK_CONFIG_DEFAULT_GPU_CAPTURE_SCOPE_QUEUE_FAMILY_INDEX    0
#endif

/**
 * The index of the queue, within the queue family identified by the
 * MVK_CONFIG_DEFAULT_GPU_CAPTURE_SCOPE_QUEUE_FAMILY_INDEX setting, whose presentation
 * submissions will be used as the default GPU Capture Scope during debugging in Xcode.
 */
#ifndef MVK_CONFIG_DEFAULT_GPU_CAPTURE_SCOPE_QUEUE_INDEX
#   define MVK_CONFIG_DEFAULT_GPU_CAPTURE_SCOPE_QUEUE_INDEX    0
#endif

/**
 * The scope under which to automatically run a GPU capture within Xcode, without the
 * developer having to trigger it manually via the Xcode UI. This is useful when trying
 * to capture a one-shot trace, such as when running a Vulkan CTS test case.
 */
#define MVK_CONFIG_AUTO_GPU_CAPTURE_SCOPE_NONE		0
#define MVK_CONFIG_AUTO_GPU_CAPTURE_SCOPE_DEVICE	1
#ifndef MVK_CONFIG_AUTO_GPU_CAPTURE_SCOPE
#   define MVK_CONFIG_AUTO_GPU_CAPTURE_SCOPE    	MVK_CONFIG_AUTO_GPU_CAPTURE_SCOPE_NONE
#endif

/** Force the use of a low-power GPU if it exists. Disabled by default. */
#ifndef MVK_CONFIG_FORCE_LOW_POWER_GPU
#   define MVK_CONFIG_FORCE_LOW_POWER_GPU    0
#endif

/**
 * Allow the use of MTLFence or MTLEvent for VkSemaphore synchronization behaviour.
 * By default:
 *   - MVK_ALLOW_METAL_FENCES is enabled
 *   - MVK_ALLOW_METAL_EVENTS is disabled
 * */
#ifndef MVK_ALLOW_METAL_FENCES
#   define MVK_ALLOW_METAL_FENCES    1
#endif
#ifndef MVK_ALLOW_METAL_EVENTS
#   define MVK_ALLOW_METAL_EVENTS    0
#endif

/** Substitute Metal 2D textures for Vulkan 1D images. Enabled by default. */
#ifndef MVK_CONFIG_TEXTURE_1D_AS_2D
#   define MVK_CONFIG_TEXTURE_1D_AS_2D    1
#endif

/**
 * IOSurfaces are supported on macOS, and on iOS starting with iOS 11.
 *
 * To enable IOSurface support on iOS in MoltenVK, set the iOS Deployment Target
 * (IPHONEOS_DEPLOYMENT_TARGET) build setting to 11.0 or greater when building
 * MoltenVK, and any app that uses IOSurfaces.
 */
#if MVK_MACOS
#	define MVK_SUPPORT_IOSURFACE_BOOL    1
#endif

#if MVK_IOS
#	define MVK_SUPPORT_IOSURFACE_BOOL	(__IPHONE_OS_VERSION_MIN_REQUIRED >= __IPHONE_11_0)
#endif