export const GPUPrimitiveTopology = {
	PointList: 'point-list',
	LineList: 'line-list',
	LineStrip: 'line-strip',
	TriangleList: 'triangle-list',
	TriangleStrip: 'triangle-strip',
};

export const GPUShaderStage = ( typeof self !== 'undefined' ) ? self.GPUShaderStage : { VERTEX: 1, FRAGMENT: 2, COMPUTE: 4 };

export const GPUCompareFunction = {
	Never: 'never',
	Less: 'less',
	Equal: 'equal',
	LessEqual: 'less-equal',
	Greater: 'greater',
	NotEqual: 'not-equal',
	GreaterEqual: 'greater-equal',
	Always: 'always'
};

export const GPUStoreOp = {
	Store: 'store',
	Discard: 'discard'
};

export const GPULoadOp = {
	Load: 'load',
	Clear: 'clear'
};

export const GPUFrontFace = {
	CCW: 'ccw',
	CW: 'cw'
};

export const GPUCullMode = {
	None: 'none',
	Front: 'front',
	Back: 'back'
};

export const GPUIndexFormat = {
	Uint16: 'uint16',
	Uint32: 'uint32'
};

export const GPUVertexFormat = {
	Uint8x2: 'uint8x2',
	Uint8x4: 'uint8x4',
	Sint8x2: 'sint8x2',
	Sint8x4: 'sint8x4',
	Unorm8x2: 'unorm8x2',
	Unorm8x4: 'unorm8x4',
	Snorm8x2: 'snorm8x2',
	Snorm8x4: 'snorm8x4',
	Uint16x2: 'uint16x2',
	Uint16x4: 'uint16x4',
	Sint16x2: 'sint16x2',
	Sint16x4: 'sint16x4',
	Unorm16x2: 'unorm16x2',
	Unorm16x4: 'unorm16x4',
	Snorm16x2: 'snorm16x2',
	Snorm16x4: 'snorm16x4',
	Float16x2: 'float16x2',
	Float16x4: 'float16x4',
	Float32: 'float32',
	Float32x2: 'float32x2',
	Float32x3: 'float32x3',
	Float32x4: 'float32x4',
	Uint32: 'uint32',
	Uint32x2: 'uint32x2',
	Uint32x3: 'uint32x3',
	Uint32x4: 'uint32x4',
	Sint32: 'sint32',
	Sint32x2: 'sint32x2',
	Sint32x3: 'sint32x3',
	Sint32x4: 'sint32x4'
};

export const GPUTextureFormat = {

	// 8-bit formats

	R8Unorm: 'r8unorm',
	R8Snorm: 'r8snorm',
	R8Uint: 'r8uint',
	R8Sint: 'r8sint',

	// 16-bit formats

	R16Uint: 'r16uint',
	R16Sint: 'r16sint',
	R16Float: 'r16float',
	RG8Unorm: 'rg8unorm',
	RG8Snorm: 'rg8snorm',
	RG8Uint: 'rg8uint',
	RG8Sint: 'rg8sint',

	// 32-bit formats

	R32Uint: 'r32uint',
	R32Sint: 'r32sint',
	R32Float: 'r32float',
	RG16Uint: 'rg16uint',
	RG16Sint: 'rg16sint',
	RG16Float: 'rg16float',
	RGBA8Unorm: 'rgba8unorm',
	RGBA8UnormSRGB: 'rgba8unorm-srgb',
	RGBA8Snorm: 'rgba8snorm',
	RGBA8Uint: 'rgba8uint',
	RGBA8Sint: 'rgba8sint',
	BGRA8Unorm: 'bgra8unorm',
	BGRA8UnormSRGB: 'bgra8unorm-srgb',
	// Packed 32-bit formats
	RGB9E5UFloat: 'rgb9e5ufloat',
	RGB10A2Unorm: 'rgb10a2unorm',
	RG11B10UFloat: 'rg11b10ufloat',

	// 64-bit formats

	RG32Uint: 'rg32uint',
	RG32Sint: 'rg32sint',
	RG32Float: 'rg32float',
	RGBA16Uint: 'rgba16uint',
	RGBA16Sint: 'rgba16sint',
	RGBA16Float: 'rgba16float',

	// 128-bit formats

	RGBA32Uint: 'rgba32uint',
	RGBA32Sint: 'rgba32sint',
	RGBA32Float: 'rgba32float',

	// Depth and stencil formats

	Stencil8: 'stencil8',
	Depth16Unorm: 'depth16unorm',
	Depth24Plus: 'depth24plus',
	Depth24PlusStencil8: 'depth24plus-stencil8',
	Depth32Float: 'depth32float',

	// 'depth32float-stencil8' extension

	Depth32FloatStencil8: 'depth32float-stencil8',

	// BC compressed formats usable if 'texture-compression-bc' is both
	// supported by the device/user agent and enabled in requestDevice.

	BC1RGBAUnorm: 'bc1-rgba-unorm',
	BC1RGBAUnormSRGB: 'bc1-rgba-unorm-srgb',
	BC2RGBAUnorm: 'bc2-rgba-unorm',
	BC2RGBAUnormSRGB: 'bc2-rgba-unorm-srgb',
	BC3RGBAUnorm: 'bc3-rgba-unorm',
	BC3RGBAUnormSRGB: 'bc3-rgba-unorm-srgb',
	BC4RUnorm: 'bc4-r-unorm',
	BC4RSnorm: 'bc4-r-snorm',
	BC5RGUnorm: 'bc5-rg-unorm',
	BC5RGSnorm: 'bc5-rg-snorm',
	BC6HRGBUFloat: 'bc6h-rgb-ufloat',
	BC6HRGBFloat: 'bc6h-rgb-float',
	BC7RGBAUnorm: 'bc7-rgba-unorm',
	BC7RGBAUnormSRGB: 'bc7-rgba-unorm-srgb',

	// ETC2 compressed formats usable if 'texture-compression-etc2' is both
	// supported by the device/user agent and enabled in requestDevice.

	ETC2RGB8Unorm: 'etc2-rgb8unorm',
	ETC2RGB8UnormSRGB: 'etc2-rgb8unorm-srgb',
	ETC2RGB8A1Unorm: 'etc2-rgb8a1unorm',
	ETC2RGB8A1UnormSRGB: 'etc2-rgb8a1unorm-srgb',
	ETC2RGBA8Unorm: 'etc2-rgba8unorm',
	ETC2RGBA8UnormSRGB: 'etc2-rgba8unorm-srgb',
	EACR11Unorm: 'eac-r11unorm',
	EACR11Snorm: 'eac-r11snorm',
	EACRG11Unorm: 'eac-rg11unorm',
	EACRG11Snorm: 'eac-rg11snorm',

	// ASTC compressed formats usable if 'texture-compression-astc' is both
	// supported by the device/user agent and enabled in requestDevice.

	ASTC4x4Unorm: 'astc-4x4-unorm',
	ASTC4x4UnormSRGB: 'astc-4x4-unorm-srgb',
	ASTC5x4Unorm: 'astc-5x4-unorm',
	ASTC5x4UnormSRGB: 'astc-5x4-unorm-srgb',
	ASTC5x5Unorm: 'astc-5x5-unorm',
	ASTC5x5UnormSRGB: 'astc-5x5-unorm-srgb',
	ASTC6x5Unorm: 'astc-6x5-unorm',
	ASTC6x5UnormSRGB: 'astc-6x5-unorm-srgb',
	ASTC6x6Unorm: 'astc-6x6-unorm',
	ASTC6x6UnormSRGB: 'astc-6x6-unorm-srgb',
	ASTC8x5Unorm: 'astc-8x5-unorm',
	ASTC8x5UnormSRGB: 'astc-8x5-unorm-srgb',
	ASTC8x6Unorm: 'astc-8x6-unorm',
	ASTC8x6UnormSRGB: 'astc-8x6-unorm-srgb',
	ASTC8x8Unorm: 'astc-8x8-unorm',
	ASTC8x8UnormSRGB: 'astc-8x8-unorm-srgb',
	ASTC10x5Unorm: 'astc-10x5-unorm',
	ASTC10x5UnormSRGB: 'astc-10x5-unorm-srgb',
	ASTC10x6Unorm: 'astc-10x6-unorm',
	ASTC10x6UnormSRGB: 'astc-10x6-unorm-srgb',
	ASTC10x8Unorm: 'astc-10x8-unorm',
	ASTC10x8UnormSRGB: 'astc-10x8-unorm-srgb',
	ASTC10x10Unorm: 'astc-10x10-unorm',
	ASTC10x10UnormSRGB: 'astc-10x10-unorm-srgb',
	ASTC12x10Unorm: 'astc-12x10-unorm',
	ASTC12x10UnormSRGB: 'astc-12x10-unorm-srgb',
	ASTC12x12Unorm: 'astc-12x12-unorm',
	ASTC12x12UnormSRGB: 'astc-12x12-unorm-srgb',

};

export const GPUAddressMode = {
	ClampToEdge: 'clamp-to-edge',
	Repeat: 'repeat',
	MirrorRepeat: 'mirror-repeat'
};

export const GPUFilterMode = {
	Linear: 'linear',
	Nearest: 'nearest'
};

export const GPUBlendFactor = {
	Zero: 'zero',
	One: 'one',
	Src: 'src',
	OneMinusSrc: 'one-minus-src',
	SrcAlpha: 'src-alpha',
	OneMinusSrcAlpha: 'one-minus-src-alpha',
	Dst: 'dst',
	OneMinusDst: 'one-minus-dst',
	DstAlpha: 'dst-alpha',
	OneMinusDstAlpha: 'one-minus-dst-alpha',
	SrcAlphaSaturated: 'src-alpha-saturated',
	Constant: 'constant',
	OneMinusConstant: 'one-minus-constant'
};

export const GPUBlendOperation = {
	Add: 'add',
	Subtract: 'subtract',
	ReverseSubtract: 'reverse-subtract',
	Min: 'min',
	Max: 'max'
};

export const GPUColorWriteFlags = {
	None: 0,
	Red: 0x1,
	Green: 0x2,
	Blue: 0x4,
	Alpha: 0x8,
	All: 0xF
};

export const GPUStencilOperation = {
	Keep: 'keep',
	Zero: 'zero',
	Replace: 'replace',
	Invert: 'invert',
	IncrementClamp: 'increment-clamp',
	DecrementClamp: 'decrement-clamp',
	IncrementWrap: 'increment-wrap',
	DecrementWrap: 'decrement-wrap'
};

export const GPUBufferBindingType = {
	Uniform: 'uniform',
	Storage: 'storage',
	ReadOnlyStorage: 'read-only-storage'
};

export const GPUStorageTextureAccess = {
	WriteOnly: 'write-only',
	ReadOnly: 'read-only',
	ReadWrite: 'read-write',
};

export const GPUSamplerBindingType = {
	Filtering: 'filtering',
	NonFiltering: 'non-filtering',
	Comparison: 'comparison'
};

export const GPUTextureSampleType = {
	Float: 'float',
	UnfilterableFloat: 'unfilterable-float',
	Depth: 'depth',
	SInt: 'sint',
	UInt: 'uint'
};

export const GPUTextureDimension = {
	OneD: '1d',
	TwoD: '2d',
	ThreeD: '3d'
};

export const GPUTextureViewDimension = {
	OneD: '1d',
	TwoD: '2d',
	TwoDArray: '2d-array',
	Cube: 'cube',
	CubeArray: 'cube-array',
	ThreeD: '3d'
};

export const GPUTextureAspect = {
	All: 'all',
	StencilOnly: 'stencil-only',
	DepthOnly: 'depth-only'
};

export const GPUInputStepMode = {
	Vertex: 'vertex',
	Instance: 'instance'
};

export const GPUFeatureName = {
	CoreFeaturesAndLimits: 'core-features-and-limits',
	DepthClipControl: 'depth-clip-control',
	Depth32FloatStencil8: 'depth32float-stencil8',
	TextureCompressionBC: 'texture-compression-bc',
	TextureCompressionBCSliced3D: 'texture-compression-bc-sliced-3d',
	TextureCompressionETC2: 'texture-compression-etc2',
	TextureCompressionASTC: 'texture-compression-astc',
	TextureCompressionASTCSliced3D: 'texture-compression-astc-sliced-3d',
	TimestampQuery: 'timestamp-query',
	IndirectFirstInstance: 'indirect-first-instance',
	ShaderF16: 'shader-f16',
	RG11B10UFloat: 'rg11b10ufloat-renderable',
	BGRA8UNormStorage: 'bgra8unorm-storage',
	Float32Filterable: 'float32-filterable',
	Float32Blendable: 'float32-blendable',
	ClipDistances: 'clip-distances',
	DualSourceBlending: 'dual-source-blending',
	Subgroups: 'subgroups',
	TextureFormatsTier1: 'texture-formats-tier1',
	TextureFormatsTier2: 'texture-formats-tier2'
};

export const GPUFeatureMap = {
	'texture-compression-s3tc': 'texture-compression-bc',
	'texture-compression-etc1': 'texture-compression-etc2'
};
