Definition of some Metal constant values

MetalConstants.h

//******************************************************************************
//
// Copyright (c) 2016 Microsoft Corporation. All rights reserved.
//
// This code is licensed under the MIT License (MIT).
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
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//******************************************************************************
#pragma once

#import <Foundation/NSObjCRuntime.h>
#import <Metal/MetalExport.h>

typedef NS_ENUM(NSUInteger, MTLCompareFunction) {
    MTLCompareFunctionNever = 0,
    MTLCompareFunctionLess = 1,
    MTLCompareFunctionEqual = 2,
    MTLCompareFunctionLessEqual = 3,
    MTLCompareFunctionGreater = 4,
    MTLCompareFunctionNotEqual = 5,
    MTLCompareFunctionGreaterEqual = 6,
    MTLCompareFunctionAlways = 7
};

typedef NS_ENUM(NSUInteger, MTLPixelFormat) {
    MTLPixelFormatInvalid = 0,
    MTLPixelFormatA8Unorm = 1,
    MTLPixelFormatR8Unorm = 10,
    MTLPixelFormatR8Unorm_sRGB = 11,
    MTLPixelFormatR8Snorm = 12,
    MTLPixelFormatR8Uint = 13,
    MTLPixelFormatR8Sint = 14,
    MTLPixelFormatR16Unorm = 20,
    MTLPixelFormatR16Snorm = 22,
    MTLPixelFormatR16Uint = 23,
    MTLPixelFormatR16Sint = 24,
    MTLPixelFormatR16Float = 25,
    MTLPixelFormatRG8Unorm = 30,
    MTLPixelFormatRG8Unorm_sRGB = 31,
    MTLPixelFormatRG8Snorm = 32,
    MTLPixelFormatRG8Uint = 33,
    MTLPixelFormatRG8Sint = 34,
    MTLPixelFormatB5G6R5Unorm = 40,
    MTLPixelFormatA1BGR5Unorm = 41,
    MTLPixelFormatABGR4Unorm = 42,
    MTLPixelFormatBGR5A1Unorm = 43,
    MTLPixelFormatR32Uint = 53,
    MTLPixelFormatR32Sint = 54,
    MTLPixelFormatR32Float = 55,
    MTLPixelFormatRG16Unorm = 60,
    MTLPixelFormatRG16Snorm = 62,
    MTLPixelFormatRG16Uint = 63,
    MTLPixelFormatRG16Sint = 64,
    MTLPixelFormatRG16Float = 65,
    MTLPixelFormatRGBA8Unorm = 70,
    MTLPixelFormatRGBA8Unorm_sRGB = 71,
    MTLPixelFormatRGBA8Snorm = 72,
    MTLPixelFormatRGBA8Uint = 73,
    MTLPixelFormatRGBA8Sint = 74,
    MTLPixelFormatBGRA8Unorm = 80,
    MTLPixelFormatBGRA8Unorm_sRGB = 81,
    MTLPixelFormatRGB10A2Unorm = 90,
    MTLPixelFormatRGB10A2Uint = 91,
    MTLPixelFormatRG11B10Float = 92,
    MTLPixelFormatRGB9E5Float = 93,
    MTLPixelFormatRG32Uint = 103,
    MTLPixelFormatRG32Sint = 104,
    MTLPixelFormatRG32Float = 105,
    MTLPixelFormatRGBA16Unorm = 110,
    MTLPixelFormatRGBA16Snorm = 112,
    MTLPixelFormatRGBA16Uint = 113,
    MTLPixelFormatRGBA16Sint = 114,
    MTLPixelFormatRGBA16Float = 115,
    MTLPixelFormatRGBA32Uint = 123,
    MTLPixelFormatRGBA32Sint = 124,
    MTLPixelFormatRGBA32Float = 125,
    MTLPixelFormatPVRTC_RGB_2BPP = 160,
    MTLPixelFormatPVRTC_RGB_2BPP_sRGB = 161,
    MTLPixelFormatPVRTC_RGB_4BPP = 162,
    MTLPixelFormatPVRTC_RGB_4BPP_sRGB = 163,
    MTLPixelFormatPVRTC_RGBA_2BPP = 164,
    MTLPixelFormatPVRTC_RGBA_2BPP_sRGB = 165,
    MTLPixelFormatPVRTC_RGBA_4BPP = 166,
    MTLPixelFormatPVRTC_RGBA_4BPP_sRGB = 167,
    MTLPixelFormatEAC_R11Unorm = 170,
    MTLPixelFormatEAC_R11Snorm = 172,
    MTLPixelFormatEAC_RG11Unorm = 174,
    MTLPixelFormatEAC_RG11Snorm = 176,
    MTLPixelFormatEAC_RGBA8 = 178,
    MTLPixelFormatEAC_RGBA8_sRGB = 179,
    MTLPixelFormatETC2_RGB8 = 180,
    MTLPixelFormatETC2_RGB8_sRGB = 181,
    MTLPixelFormatETC2_RGB8A1 = 182,
    MTLPixelFormatETC2_RGB8A1_sRGB = 183,
    MTLPixelFormatASTC_4x4_sRGB = 186,
    MTLPixelFormatASTC_5x4_sRGB = 187,
    MTLPixelFormatASTC_5x5_sRGB = 188,
    MTLPixelFormatASTC_6x5_sRGB = 189,
    MTLPixelFormatASTC_6x6_sRGB = 190,
    MTLPixelFormatASTC_8x5_sRGB = 192,
    MTLPixelFormatASTC_8x6_sRGB = 193,
    MTLPixelFormatASTC_8x8_sRGB = 194,
    MTLPixelFormatASTC_10x5_sRGB = 195,
    MTLPixelFormatASTC_10x6_sRGB = 196,
    MTLPixelFormatASTC_10x8_sRGB = 197,
    MTLPixelFormatASTC_10x10_sRGB = 198,
    MTLPixelFormatASTC_12x10_sRGB = 199,
    MTLPixelFormatASTC_12x12_sRGB = 200,
    MTLPixelFormatASTC_4x4_LDR = 204,
    MTLPixelFormatASTC_5x4_LDR = 205,
    MTLPixelFormatASTC_5x5_LDR = 206,
    MTLPixelFormatASTC_6x5_LDR = 207,
    MTLPixelFormatASTC_6x6_LDR = 208,
    MTLPixelFormatASTC_8x5_LDR = 210,
    MTLPixelFormatASTC_8x6_LDR = 211,
    MTLPixelFormatASTC_8x8_LDR = 212,
    MTLPixelFormatASTC_10x5_LDR = 213,
    MTLPixelFormatASTC_10x6_LDR = 214,
    MTLPixelFormatASTC_10x8_LDR = 215,
    MTLPixelFormatASTC_10x10_LDR = 216,
    MTLPixelFormatASTC_12x10_LDR = 217,
    MTLPixelFormatASTC_12x12_LDR = 218,
    MTLPixelFormatGBGR422 = 240,
    MTLPixelFormatBGRG422 = 241,
    MTLPixelFormatDepth32Float = 252,
    MTLPixelFormatStencil8 = 253,
    MTLPixelFormatDepth24Unorm_Stencil8 = 255,
    MTLPixelFormatDepth32Float_Stencil8 = 260,
};